HomeMy WebLinkAboutAttachmt 15 Vargas Mitigated Negative Declaration
Lead Agency:
INITIAL STUDY/
MITIGATED NEGATIVE DECLARATION
FOR THE
VARGAS PROJECT
MARCH 2007
City of Dublin
100 Civic Plaza
Dublin, CA 94568
Attachment 15
Table of Contents
Earlier Analysis............................ .......................................... ................ ...................2
Eastern Dublin Planning Area................................ ............................................. .............3
Project Location and Site Information.............. ..... ... .......... ................................ ...............3
Project Description..... ........................... ... ...... ... ........ ............ ....... ...... ........... ... ... .... ....5
Project Applications................................ ..................... ........................... ............... ... ...7
Exhibit 1: Eastern Dublin Specific Plan Area Map........................................ .................... .. ...9
Exhibit 2: Regional Map. . . .. . . . . .. . . . . . . . . . . .. . . . . . . . .. . . . . . . . .... . . . . .. . . . . . . .. . . . . . . . .. .. . . . .. . . .. . . . . . . . . . . . . . .. . .1 0
Exhibit 3: Vicinity Map........... ............................. ............ ............ ............... ........ .... ....11
Exhibit 4: Aerial Photo. . .. . . .. . . . .. . . . . . . . . .. . . . . . .. . . .. .. . . . . ... . . . . . . .. . . . . . . . . . .. . . . . . . . .. . . . . . . . . . . .. . .. . . . . . . . . ..12
Exhibit 5: Topography Map........ ................. ............................ ......... ... ............ ............ .13
Exhibit 6: Site Section. . .. . .. . .. . .. . . . . .. . . . ... . .. ... . .... . ... . .... ... . .. ... . .. . . . . .. ... . .. . .. . .. . .. . .. . ... ....... ... .14
Exhibit 7: Existing and Proposed Land Use Designations Map........ .................. .............. ....... .15
Exhibit 8: Stage 1 Development Plan........... .... ..... ...... ........................ ......... ............. .......16
Exhibit 9: Preliminary Site Plan. . .. . .. . .. . .. . .. . ... .. . .. . .. . ... . . . .. . .. . .. .... ... .. . ... ... ., . .. . .. . .. . ..... ...... ...17
Exhibit 10: Photo Location Map. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . . . .... .. ... . .. . .. . .. . .. . ..... . .., .. ... . ... ... .18
Exhibit 11: Site Photos............. .... ........ ....... .................. ....................................... ..... .19
Exhibit 12: Jurisdictional Delineation Map.. .......................................................................................... .22
Environmental Checklist. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
Discussion of Checklist........................................................................... ................... .39
Aesthetics. . .. . .. . . . . . .. . . ... . .. . .. ... ... ... . .. . ..... ... . .. ... ....... .. . .. . ... .. . .. . .. . ... .. . .. . . . .... .. . ... . ...39
Agricultural Resources. ................ ...... ........ .............................................. ...... ....42
Air Quality. . ... .. ... . ., . . . . .. . .. . ,. . . . . .. . . . . ... .. . .. . .. . .. . .. . .. . .. .... ... .. ... . ... .. ... . .. . .. . . .. .. ... . ... ..43
Biological Resources.......... ........................................................................... ....46
Cultural Resources......................................................................................... ..56
Geology and Soils......................................................................................... ...57
Hazards and Hazardous Materials....................................................................... ...60
Hydrology and Water Quality........... ......... ............... ........ .......... ............ ............ .61
Land Use and Planning............................. .................. ........................... ..... ... ....65
Mineral Resources. . .. . ... ... .. . .. . .. ... . .. ......... . ... .. ......... ... . .. . ...... .. . .. . . . ......... ... . ....... .65
Noise........................................................................................................ ...66
Population and Housing.................... ....................... .................................. .........67
Public Services.............................................................................................. ..68
Recreation. . ... .. . .. . .. . .. . .. . . . . .. . .. ... . .. . ..... . .. :.. ... ... ... ... . ... ... .. . .. . .. . .. . .. .. . . .. ... . .......... . .70
Transportation/Traffic................................................................................... .....71
Utilities and Service System.............................................................................. ..85
Mandatory Findings of Significance. .... .. ... ....... ... .. . .. . ... .. ... .... ... .. . .. . .. .... . .. ..... .... ..... .87
Appendices.. .............. ... .... ... ...... ........... .... ........ ....... ..... .... ...... ..... ....... ..... ... .... ..... ..88
A: Biological Resources Analysis
B: Tree Report
C: Preliminary Geologic and Geotechnical Report
D: Hydrologic Analysis
E: Moller Ranch/Casamira Valley Traffic Study
F: Excerpt from the Dublin Ranch West Supplemental Environmental Impact Report
Mitigated Negative Declaration
Vargas Property
P A 06-030
Earlier Analysis
On May 10, 1993, the Dublin City Council adopted Resolution No. 51-93, certifying an Environmental
Impact Report (EIR) for the Eastern Dublin General Plan Amendment and Eastern Dublin Specific Plan
(Eastern Dublin EIR, SCH #91103064). The certified EIR consisted of a Draft EIR and Responses to
Comments bound volumes, as well as an Addendum dated May 4, 1993, assessing a reduced
development alternative. The City Council adopted Resolution No. 53-93 approving a General Plan
Amendment and a Specific Plan for the reduced area alternative on May 10, 1993. On August 22,1994,
the City Council adopted a second Addendum updating wastewater disposal plans for Eastern Dublin.
For identified impacts that could not be mitigated to a less than significant level, the City Council
adopted a Statement of Overriding Considerations for cumulative traffic, extension of certain community
facilities (natural gas, electric and telephone service), regional air quality, noise and other impacts.
The Eastern Dublin Specific Plan was adopted by the City to encourage orderly growth of the Eastern
Dublin area. Because the Eastern Dublin project proposed urbanization of the almost completely
undeveloped Eastern Dublin area, the Eastern Dublin EIR also analyzed conversion of agricultural and
open space lands to urban uses. These impacts together with visual impacts from urbanization were also
determined to be significant and unavoidable. Where the Eastern Dublin EIR identified impacts that
could be mitigated, the previously adopted mitigation measures that are applicable to this Project and
Project site continue to apply to the proposed Vargas project. The Eastern Dublin EIR, Resolutions 51-
93 and 53-93, and the 1994 Addendum are incorporated herein by reference and are available for review
i~ the Planning Division at the Dublin City Hall, 100 Civic Plaza, Dublin, California during normal
business hours.
The Eastern Dublin EIR was a Program EIR and evaluated the potential environmental effects of
urbanizing Eastern Dublin over a 20 to 30 year period. As such, the Eastern Dublin EIR addressed the
cumulative effects of developing in agricultural and open space areas and the basic policy considerations
accompanying the change in character from undeveloped to developed lands. Since certification of the
EIR, many implementing projects along Tassajara Road such as Dublin Ranch West, Mission Peak, and
Pinn Brothers/Silvera Ranch, as well as projects elsewhere in Eastern Dublin such as Dublin Ranch and
Fallon Village have been approved, relying to various degrees on the Program EIR.
Consistent with CEQA Guidelines ~ 15168(c), (d), and ~~ 15162, 15163, this initial study examines
whether additional environmental review is required for the Vargas Project. Later discussion sections of
the initial study checklist will identify where cumulative and/or programmatic analyses occurred in the
Eastern Dublin EIR, and will identify Eastern Dublin EIR mitigation measures that apply to the Project.
Pursuant to CEQA's tiering principles, the initial study will also identifY site or project specific impacts
that were not addressed in the Program EIR, if any. While tiering is generally limited to implementing
projects that are consistent with the general plan, the general plan and specific plan amendments for the
Project are proposed for residential uses, as under the current plans, but at a reduced density. Therefore,
Initial Study/Mitigated Negative Declaration for the Vargas Project
City of Dublin 2
March 2007
the previously identified impacts related to project density are expected to be within the scope ofthe
Program EIR, as further analyzed below.
Consistent with CEQA Guidelines ~ 15168(c), (d), and ~S 15162, 15163, this initial study examines
whether additional environmental review is required for the Vargas Project. Later discussion sections of
the initial study checklist will identify where cumulative and/or programmatic analyses occurred in the
Eastern Dublin EIR, and will identifY Eastern Dublin EIR mitigation measures that apply to the Project.
Pursuant to CEQA's tiering principles, the initial study will also identifY site or project specific impacts
that were not addressed in the Program EIR, if any. While tiering is generally limited to implementing
projects that are consistent with the general plan, the general plan and specific plan amendments for the
Project are proposed for residential uses, as under the current plans, but at a reduced density. Therefore,
the previously identified impacts related to project density are expected to be within the scope ofthe
Program EIR, as further analyzed below. A portion of the cumulative traffic analysis tiers from the
certified Dublin Ranch West/Wallis Ranch Supplemental EIR. as further discussed in Section XV,
Transportation/Traffic.
Eastern Dublin Planning Area
The City Council approved the Eastern Dublin General Plan Amendment in 1993 for an approximately
4,200 acre area. Most of the area designated on the General Plan for development was also located in
the approximately 3,300 acre Specific Plan area. Other areas designated in the General Plan for future
development have since been added to the Specific Plan, such as portions of Fallon Village. The Eastern
Dublin Specific Plan was adopted by the City Council in 1993 and has been amended several times since
then to include new properties and development consistent with the General Plan. The original Eastern
Dublin Specific Plan envisioned a balanced community comprised of mixed residential types and
commercial uses. The Dublin General Plan and Eastern Dublin Specific Plan are incorporated herein by
reference and are available for review in the Planning Division at the Dublin City Hall, 100 Civic Plaza,
Dublin, CA during normal business hours.
The Eastern Dublin planning area is located east of Dougherty Road and is between the Alameda/Contra
Costa County border and 1-580 (see Exhibit 1). The planning area is characterized by relatively flat
topography along 1-580 with gently roIling foothills as the land moves away from 1-580 to the north near
the border of Alameda and Contra Costa County. At the time the Eastern Dublin Specific Plan was
developed, Eastern Dublin was comprised of farmland, grazing and rural residential sites.
Exhibit 1 shows the limits of the planning area.
Project Location and Site Information
The Project site is located at 7020 Tassajara Road in the Eastern Dublin Specific Plan area, outside of
the City Limits, but within the City Sphere of Influence (Exhibits 2 and 3). The site is located in
unincorporated Alameda County (outside City Limits). The County zoning for this property is A
(Agriculture). The property has a Dublin General Plan/Specific Plan land use designation of Medium-
Density Residential and Medium/High-Density Residential.
March 2007
Initial Study/Mitigated Negative Declaration for the Vargas Project
City of Dublin 3
The project is in an area that is currently transitioning from rural residential home sites and grazing uses
to residential developments (Exhibit 4), in accordance with the Dublin General Plan and Eastern Dublin
Specific Plan. The Project site is 5.0 gross acres in size (4.38 total acres) and is located adjacent to
Tassajara Road (to the east) and Tassajara Creek (to the west), north of Fallon Road. The creek bed and
bank are located off of the property; however, this area is located in close proximity to the western
property line ofthe Project site (see Exhibits 10 and 11). The Vargas property consists of sparse
shrubbery, few trees and non-native grassland. The Tassajara Creek is located adjacent to the western
property line and the top of the creek bank is visible from a portion of Tassajara Road. The Eastern
Dublin Comprehensive Stream Restoration Program requires all development to be set back a minimum
of 100 feet from the top of the creek bank and a portion of the property is within this required setback
(Exhibit 9). The Stream Comprehensive Stream Restoration Program is incorporated herein by reference
and is available for review in City Hall in the Planning Division during normal business hours.
The Eastern Dublin Specific Plan was adopted by the City of Dublin in 1993 and has been modified
several times since then to include additional properties. The Vargas property has been within the plan
since its inception, and has been designated for residential use and medium and medium/high densities.
Surrounding properties include the Tipper property to the north which has a general plan land use
designation of Medium-Density Residential and currently has one dwelling unit and a few accessory
structures on it. The Fredrich property is located to the south ofthe project site and is designated as
Medium/High-Density Residential and Neighborhood Commercial in the general plan. The Fredrich
property is currently developed with one dwelling unit and a few accessory structures and was recently
annexed to the City as part of the Mission Peak annexation. The Moller Ranch/Casamira Valley project
is located to the east ofthe property across Tassajara Road and is currently under review for attached and
detached dweIling units. Dublin Ranch WestlWallis Ranch is located to the west of the project site and
was recently annexed to the City. The City has also approved the Dublin Ranch West project for a 1,094
dwelling unit residential development.
Existing access to the residence is taken from a shared driveway (with the Fredrich property) off of
Tassajara Road. In addition to the house, an existing pool and several accessory structures are located in
this area. Secondary access may also be taken from a second driveway off of Tassajara Road to a cluster
of accessory structures (Exhibit 4) which includes a horse barn and a lean-to.
The existing site was part of Rancho San Ramon and was used for grazing up into the mid-twentieth
century. The property was sold off in the mid-twentieth century and a dwelling unit was constructed in
the 1960's. That dwelling unit remains and today the property has a one-story house and several
accessory structures. Since 1984, a non-conforming contractor yard has operated at this property in the
several accessory structures located off of the second entrance to the property and adjacent to the western
property line. The contractors yard is a non-conforming use in the Alameda County Agriculture Zoning
District.
Initial Study/Mitigated Negative Declaration for the Vargas Project
City of Dublin 4
March 2007
Project Description
The Applicant, Sun Valley Land Development Company, is proposing to develop the Vargas property
with 33 detached units on a 5 gross acre site. As discussed above, the existing site is currently being used
for one residential dwelling with related accessory structures including a small horse barn. The proposed
number of units is lower than what the existing land use designation allows to be constructed on the site
and a General Plan and Specific Plan Amendment will be required. The proposed Project also includes a
small pedestrian trail near the creek, native landscaping in the areas adjacent to the creek as well as
landscaping throughout the development and on Tassajara Road. The project also includes new dwelling
units, grading, streets, driveways and fencing. The existing structures located on the site will be removed
in order to accommodate the new residential development.
The proposed Project also includes a PD-Planned Development District prezoning and related Stage 1
Development Plan and an annexation to the City, Pre-Annexation Agreement and annexation into the
Dublin San Ramon Services District. Among other things, the Stage I Development Plan establishes the
site area, conceptual site plan, proposed density and the maximum number of dwelling units for future
development on the site. The Stage 1 Development Plan is used to prezone the property only. Once the
Applicant is ready to propose the actual development, the Applicant will then apply for a Stage 2
Development Plan and Rezone, tentative map and a Site Development Review. The project will then be
reviewed in greater detail during the Stage 2 rezoning, tentative map and Site Development Review
because project-level plans will be submitted at that time.
Grading will be required on the site to provide suitable building pads, interior roads and utilities. The
site will be recontoured and a portion of the site will be filled in to raise the existing grade (Exhibit 5 and
6). The existing knoll located on the property (where the existing house sits) will also be removed.
Specific Plan/General Plan Amendment
The project includes a request to change the General Plan and Specific Plan Land Use Designations on
the site. The Project site currently has two land use designations: Medium-Density Residential
(approximately 1.4 gross acres) which permits a density of 6.1 - 14.0 dwelling units per acre, and
Medium/High-Density Residential (approximately 3.6 gross acres) which permits a density of 14.1 -
25.0 dwelling units per acre. Based on the existing land use designations, a minimum of 59 units would
be required to be constructed and a maximum of 110 units could be constructed on the site (Exhibit 7).
The Eastern Dublin EIR included the Vargas property and studied development on the site with 55 units
(the midpoint of the maximum number of permitted units).
Although the site is approximately 5 gross acres (4.38 total acres), the developer believes that only 2.5
acres are developable on the site due to the ultimate Tassajara Road street right-of-way and the required
100 foot setback to the top of the Tassajara Creek bank (which is located outside of the property on the
west side). Additionally, the developer would like to construct detached units on the site which further
reduces the number of units which can be constructed on the site.
The following chart shows the existing density, the proposed density, and the total number of units that
would be permitted:
Initial Study/Mitigated Negative Declaration for the Vargas Project
City of Dublin 5
March 2007
Table 1: Existing and Proposed Land Uses
Existing Land Use Designations Proposed Land Use Designation
Medium-Density 1.4 8.5-19.6 5.0 30.5-70
Residential (6.1-14.0
du/acres)
Medium/High Density 3.6 50-90 -- --
Residential (14.0-25.0
du/acres)
Total Permitted 5.0 Gross Acres 59-11 0 units 5.0 Gross Acres 31-70 units
Total Proposed 33 units
As shown in the above table, the existing land use designations require that a minimum of 59 dwelling
units and a maximum of 110 dwelling units be constructed on the five acre parcel. The proposed land
use designation change to Medium-Density Residential would reduce the overall density on the site and
lower the permitted number of dwelling units by 40, resulting in a maximum of 70 units. The Applicant
has indicated that a maximum of 33 units would be constructed on the site in the Stage 1 Development
Plan (Exhibits 8 and 9).
Residential density in the vicinity of this development varies. The Tipper property located to the north of
the Vargas property has a land use designation of medium density residential (6.1-14.0 dwelling
units/acre). Wallis Ranch located adjacent to the Vargas and Tipper properties and has land use
designations of single family (0.9-6.0 dwelling units/acre), medium density (6.1-14.0 dwelling units/acre)
and medium high density (14.1-25.0 dwelling units/acre). The Mission Peak development located to the
southeast of the property has a density of single family and rural residential (1 dwelling unit/100 acres).
The Silvera Ranch development is located southeast of the project site and has densities of medium
density, medium high density and rural residential and is currently under construction. The Casamira
Valley Project, currently under review, has proposed a change to the existing land use designations on
the site to allow Medium Density Residential and Rural Residential to permit the construction of 298
units on 226 acres of land.
Stage 1 Development Plan
The Stage 1 Development Plan submitted for this project indicates that there will be a maximum of 33
detached dwelling units on the Project site. This number falls between the minimum number and
maximum number of dwelling units permitted once the land use designation is changed to Medium-
Density Residential. The proposed number of dwelling units is much lower than the maximum, 70,
permitted and the density would be 6.6 dwelling units/acre as proposed.
Lot sizes will vary on the site depending on the location of the lot and size of the house. The smallest lot
will be 21 feet wide x 67 feet in length and the largest lot will be 27 feet wide x 67 feet in length. A new
roadway will loop around the units. Lots will face the creek, internal roadway or an auto court. No lots
will face Tassajara Road and no lots will have direct access from Tassajara Road.
Two entrances will provide access into the site. The main entrance will be a four-way traffic signal and
the entrance will line up with the Moller Ranch/Casamira Valley entrance to the east of the Project site.
Initial Study/Mitigated Negative Declaration for the Vargas Project
City of Dublin 6
March 2007
Secondary access may be taken on the north side of the project through a break in the existing median
(this access point does not allow for a left turn onto Tassajara Road from the Project site).
The proposed internal roadway will be set back a minimum of 100 feet from the creek bank. This
setback is required by the City's adopted Eastern Dublin Comprehensive Stream Restoration Program.
The residential properties will be set back an additional 30 feet from the stream bank (for a total of 130
feet). A pedestrian trail will be installed adjacent to the creek area which will connect to a pedestrian
trail on the Fredrich property if the Fredrich property is developed in the future.
A new water quality pond detention basin will be constructed adjacent to the new internal roadway on
the eastern side of the property. Some of the surface water from the site will be directed to this detention
basin. The remainder ofthe surface water runoff will be directed to the storm drain system via a
connection on Tassajara Road.
Water will be provided to the Project by the Dublin San Ramon Services District (DSRSD) by an
extension of an existing Zone 3 water line which currently terminates in Fallon Road at the Silvera
Ranch Drive intersection. This water line will be extended northerly to the Tassajara Road/Fallon Road
intersection and will then by extended northerly along Tassajara Road to the Project site.
Wastewater service will be provided to the project by DSRSD with the extension of an existing sanitary
sewer line in Tassajara Road at Silvera Ranch Drive south of the site. The sanitary sewer line will be
extended to the intersection of Fallon Road and Tassajara Road and will serve the Project site.
Tassajara Road is designated as a scenic corridor by the Eastern Dublin Specific Plan. As such, the
Project will be designed to protect the scenic qualities of the site.
The Project will be constructed in a single phase. The preliminary Site Plan is shown in Exhibit 8.
Project Applications
Project applications considered in this Mitigated Negative Declaration include a reorganization to annex
the Project area into the City of Dublin and the Dublin San Ramon Services District, General and
Specific Plan Amendments and prezoning ofthe unincorporated project (Planned Development - Stage 1
Development Plan).
Annexation
The project site is currently within an unincorporated portion of Alameda County. In order for the
project to come under the jurisdiction of the City of Dublin, and to receive urban services from the
Dublin San Ramon Services District (DSRSD), annexation of the site to the City and to DSRSD must be
approved by the Alameda County Local Agency Formation Commission (LAFCo), which is a State
mandated local agency that oyersees boundary changes to cities and special districts, the formation of
new agencies including incorporation of new cities, and the consolidation of existing agencies. State law
requires that a City prezone (Planned Development - Stage 1 Development Plan) an area proposed for
annexation, and that prezoning must be consistent with the approved General Plan and Specific Plan
uses for the property. The Wallis Ranch property located to the west of the Project site and the Fredrich
property located to the south of this site were recently annexed into the City Limits. The Moller Ranch
March 2007
Initial Study/Mitigated Negative Declaration for the Vargas Project
City of Dublin 7
property located to the east of the Project site and the Tipper property located to the north are anticipated
to be annexed at the same time as the Vargas property.
Stage 1 Development Plan
The Planned Development - Stage 1 Development Plan is an Ordinance which requires a minimum of
three Public Hearings. The Stage 1 Development Plan must include all information required by Chapter
8.32 of the Dublin Zoning Ordinance including, but not limited to, a site plan, proposed density,
maximum number of residential units and a Master Landscape Plan. The purpose of the Stage 1
Development Plan is to prezone a property with development plan information in order to annex the
property into the City of Dublin. The Planning Commission must hold at least one Public Hearing and
the City Council must review the project during two Public Hearings.
General Plan Amendment
As proposed by the Applicant, a General Plan Amendment is required in order to change the General
Plan Land Use Designations on the site from Medium-Density and Medium/High-Density Residential
(Exhibit 7) to Medium-Density Residential to reduce the overall density of the site to allow the
construction of the proposed 33 detached residential dweIling unit development as shown on the Stage 1
Development Plan (Exhibit 8).
Specific Plan Amendment
As proposed by the Applicant, a Specific Plan Amendment is required in order to change the Eastern
Dublin Specific Plan Land Use Designations on the site from Medium-Density and Medium/High-
Density Residential (Exhibit 7) to Medium-Density Residential to allow the construction of the proposed
33 detached residential dwelling unit development as shown on the Stage 1 Development Plan (Exhibit
8).
Pre-Annexation Agreement
The goals and policies of the Eastern Dublin Specific Plan require land that is annexed and new
development to be revenue neutral. Prior to a submittal of an annexation request to LAFCo, the City
requires that an annexation agreement be entered into by the developer.. The annexation agreement will
guarantee that the cost of providing services to the area will not exceed the revenue received from the
area and will also assure that the financing goals and policies of the General Plan and Specific Plan are
met. The Pre-Annexation Agreement is currently being drafted and will be presented to the Planning
Commission during a future public hearing. The Planning Commission will then make a
recommendation to the City Council on whether or not to adopt the Agreement.
Next Steps
Once the property is annexed into the City of Dublin, the Applicants would need to apply for a Stage 2
Planned Development Rezone, Site Development Review (SDR), Development Agreement (DA),
Tentative Map (TM) and all construction permits prior to construction of the proposed residential
development.
Initial Study/Mitigated Negative Declaration for the Vargas Project
City of Dublin 8
March 2007
Eastern Dublin Specific Plan Area
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City of Dublin
Environmental Checklist Form
Initial Study
This Initial Study has been prepared in accordance with the provisions of the California Environmental
Quality Act (CEQA), the State CEQA Guidelines and the CEQA Guidelines adopted by the City of
Dublin. The Initial Study assesses the potential environmental impacts of implementing the proposed
project described below. The Initial Study consists of a completed environmental checklist, and a brief
explanation of the environmental topics addressed in the checklist.
1. Project title:
Vargas
2. Lead agency name and address:
City of Dublin
100 Civic Plaza
Dublin, CA 94588
3. Contact person and phone number: Erica Fraser, Senior Planner, City of Dublin Planning
Division (925) 833-6610
4. Project location:
7020 Tassajara Road, Dublin, CA 94568
5. Assessors Parcel Number(s):
986-0004-002-01
6. Project sponsor's name and address: Fred Musser
Sun Valley Land Company
4471 Stoneridge Drive Suite B
Pleasanton CA 94588
7. General Plan Designation:
Medium Density Residential (as proposed)
8. Zoning:
A (Agriculture) District (existing)
PD (Planned Development) District (proposed)
9. Specific Plan Designation:
Medium Density Residential (as proposed)
10. Description of project:
Proposed Specific Plan/General Plan Amendment for the Vargas property in the Eastern Dublin
Specific Plan area, PD Prezoning and related Stage 1 Development Plan, Pre-Annexation
Agreement and Annexation.
11. Surrounding land uses and setting:
The project site is located within the Eastern Dublin Specific Plan area and outside City Limits. The
property is located between Tassajara Road and the Tassajara Creek. Surrounding properties include
the Tipper property to the north which has a general plan land use designation of Medium-Density
Initial Study/Mitigated Negative Declaration for the Vargas Project March 2007
City of Dublin 23
Residential and currently has one dwelling unit and a few accessory structures on it. The Fredrich
property is located to the south of the project site and has a general plan land use designation of
Medium/High-Density Residential and Neighborhood Commercial. The Fredrich property is
currently developed with one dweIling unit and a few accessory structures and was recently annexed
to the City as part of the Mission Peak annexation. The Moller Ranch/Casamira Valley project is
located to the east of the property across Tassajara Road and is currently under review for attached
and detached dwelling units. Dublin Ranch West/Wallis Ranch is located to the west of the project
site and was recently annexed to the City. The City has also approved the Dublin Ranch West
project for a 1,094 dwelling unit residential development.
12. Other public agencies whose approval is required: (e.g., permits, financing approval, or
participation agreement.)
Annexation (Alameda County LAFCO)
Tentative and Final Subdivision Maps (City of Dublin)
Stage 2 PD Rezone (City of Dublin)
Site Development Review (City of Dublin)
Grading and Building Permits (City of Dublin)
Sewer and Water Connections (DSRSD)
ENVIRONMENTAL FACTORS POTENTIALLY AFFECTED:
The environmental factors checked below would be potentially affected by this project, involving at least
one impact that is a "Potentially Significant Impact" as indicated by the checklist on the following pages.
GJ Aesthetics
D Agriculture Resources
GJ Air Quality
GJ Biological Resources
GJ Cultural Resources
GJ Geology /Soils
GJ Hazards & Hazardous MaterialsGJ Hydrology / Water Quality
D Land Use / Planning
D Mineral Resources
GJ Noise
D Population / Housing
GJ Public Services
D Recreation
GJ Transportation/Traffic
GJ Utilities / Service Systems
GJ Mandatory Findings of Significance
Initial Study/Mitigated Negative Declaration for the Vargas Project
City of Dublin 24
March 2007
DETERMINATION:
On the basis of this initial evaluation:
_ 1 find that the proposed project COULD NOT have a significant effect on the environment, and
a NEGATIVE DECLARATION will be prepared.
X 1 find that although the proposed project could have a significant effect on the environment, there
will not be a significant effect in this case because revisions in the project have been made by or agreed
to by the project proponent. A MITIGATED NEGATIVE DECLARATION will be prepared.
_ I find that the proposed project MAY have a significant effect on the environment, and an
ENVIRONMENTAL IMPACT REPORT is required.
_ 1 find that the proposed project MAY have a "potentially significant impact" or "potentially
significant unless mitigated" impact on the environment, but at least one effect 1) has been adequately
analyzed in an earlier document pursuant to applicable legal standards, and 2) has been addressed by
mitigation measures based on the earlier analysis as described on attached sheets. An
ENVIRONMENT AL IMPACT REPORT is required, but it must analyze only the effects that remain
to be addressed.
_ 1 find that although the proposed project could have a significant effect on the environment,
because all potentially significant effects (a) have been analyzed adequately in an earlier EIR or
NEGATIVE DECLARATION pursuant to applicable standards, and (b) have been avoided or
mitigated pursuant to that earlier EIR or NEGATIVE DECLARATION, including revisions or
mitigation measures that are impose upon the proposed project, nothing further is required.
~C,
MO-rcl-- d (dW I
Date
Signature
Ex~-\ C G- C-.
Printed name
t-rcl;~€ r-
Initial Study/Mitigated Negative Declaration for the Vargas Project
City of Dublin 25
March 2007
Evaluation of Environmental Impacts
The source of determination is listed in parenthesis. See listing of sources used to determine each
potential impact at the end of the checklist. A full discussion of each item is found following the
checklist. The purpose of this initial study is to determine whether additional environmental review is
required beyond that in the Eastern Dublin Environmental Impact Report. The checklist responses
and related discussions identifY the related analysis in the Eastern Dublin EIR, including impacts and
adopted mitigation measures. The checklist responses and checklist discussions also disclose whether
additional impacts and/or mitigations are required for the Project.
I. AESTHETICS -- Would the project:
a) Have a substantial adverse impact on a scenic vista?
(Source 1,3,9)
b) Substantially damage scenic resources, including, but no
limited to, trees, rock outcroppings, and historic buildings
within a state scenic highway? (Source: 1,3,9)
c) Substantially degrade the existing visual character or
quality of the site and its surroundings? (Source: 1,3,9)
d) Create a new source of substantial light or glare which
would adversely affect day or nighttime views in the area?
(Source: 1,3,9)
II. AGRICULTURE RESOURCES -- In determining
whether impacts to agricultural resources are significant
environmental effects, lead agencies may refer to the
California Agricultural Land Evaluation and Site
Assessment Model (1997) prepared by the California Dept.
of Conservation as an optional model to use in assessing
impacts on agriculture and farmland. Would the project:
a) Convert Prime Farmland, Unique Farmland, or Farmland
of Statewide Importance (Farmland), as shown on the maps
prepared pursuant to the Farmland Mapping and Monitorin
Program of the California Resources Agency, to non-
agricultural use? (Source: 1,6,7)
Potentially Less Than Less Than No
Significant Significant Significant Impact
Impact with Impact
Mitigation
Incorporation
X
X
t
X
X
X
.g
Initial Study/Mitigated Negative Declaration for the Vargas Project
City of Dublin 26
March 2007
b) Conflict with existing zoning for agricultural use, or a
Williamson Act contract? (Source: 1,6,7)
c) Involve other changes in the existing environment which
due to their location or nature, could result in conversion of
Farmland, to non-agricultural use?
(Source: 1,6,7)
III. AIR QUALITY -- Where available, the significance
Criteria established by the applicable air quality
Management or air pollution control district may be
Relied upon to make the following determinations. Would
the project:
a) Conflict with or obstruct implementation of the
applicable air quality plan?(Source: 6, 19)
b) Violate any air quality standard or contribute
substantially to an existing or projected air quality
violation? (Source: 6, 19)
c) Result in a cumulatively considerable net increase of
any criteria pollutant for which the project region is non-
attainment under an applicable federal or state ambient
air quality standard (including releasing emissions which
exceed quantitative thresholds for ozone precursors)?
(Source: 6, 19)
d) Expose sensitive receptors to substantial pollutant
concentrations?(Source: 6, 19)
e) Create objectionable odors affecting a substantial
number ofpeople?(Source: 6, 19)
Potentially Less Than Less Than No
Significant Significant Significant Impact
Impact with Impact
Mitigation
Incorporation
X
X
,
X
X
X
X
X
Initial Study/Mitigated Negative Declaration for the Vargas Project
City of Dublin 27
March 2007
Potentially Less Than Less Than No
Significant Significant Significant Impact
Impact with Impact
Mitigation
Incorporation
IV. BIOLOGICAL RESOURCES --Would the project:
a) Have a substantial adverse effect, either directly or X
through habitat modifications, on any species identified as a
candidate, sensitive, or special status species in local or
regional plans, policies, or regulations, or by the California
Department ofFish and Game or U.S. Fish and Wildlife
Service? (Source: 1,6,7,10)
X
b) Have a substantial adverse effect on any riparian habitat
or other sensitive natural community identified in local or
regional plans, policies, regulations or by the California
Department ofFish and Game or US Fish and Wildlife
Service? (Source: 1,6,7,10)
X
c) Have a substantial adverse effect on federally protected
wetlands as defined by Section 404 of the Clean Water Act
(including, but not limited to, marsh, vernal pool, coastal,
etc.) through direct removal, filling, hydrological
interruption, or other means? (Source: 1,6,7,10, 18)
X
d) Interfere substantially with the movement of any native
resident or migratory fish or wildlife species or with
established native resident or migratory wildlife corridors,
or impede the use of native wildlife nursery sites?
(Source: 1,6,7,10, 15, 16, 17, 18)
X
e) Conflict with any local policies or ordinances protecting
biological resources, such as a tree preservation policy or
ordinance? (Source: 1,4,6,7,11, 18)
X
f) Conflict with the provisions of an adopted Habitat
Conservation Plan, Natural Community Conservation Plan
or other approved local, regional, or state habitat
conservation plan? (Source: 1,4,6,7,11)
V. CULTURAL RESOURCES - Would the project:
a) Cause a substantial adverse change in the significance X
of a historical resource as defined in ~ 15064.5? (Source:
6,12)
Initial Study/Mitigated Negative Declaration for the Vargas Project
City of Dublin 28
March 2007
b) Cause a substantial adverse change in the significance
of an archaeological resource pursuant to ~ 15064.5?
(Source: 6,12)
c) Directly or indirectly destroy a unique paleontological
resource or site or unique geologic feature? (Source: 6,12)
d) Disturb any human remains, including those interred
outside of formal cemeteries? (Source: 6,12)
VI. GEOLOGY AND SOILS -- Would the project:
a) Expose people or structures to potential substantial
adverse effects, including the risk of loss, injury, or death
involving:
i) Rupture of a known earthquake fault, as delineated on the
most recent Alquist-Priolo Earthquake Fault Zoning Map
issued by the State Geologist for the area or based on other
substantial evidence of a known fault? Refer to Division of
Mines and Geology Special Publication 42. (Source:
6,13,18)
ii) Strong seismic ground shaking? (Source: 6,13)
iii) Seismic-related ground failure, including liquefaction?
(Source: 6,13)
iv) Landslides? (Source: 6,13)
b) Result in substantial soil erosion or the loss of topsoil?
(Source: 6,13)
c) Be located on a geologic unit or soil that is unstable, or
that would become unstable as a result of the project, and
potentially result in on- or off-site landslide, lateral
spreading, subsidence, liquefaction or collapse?
(Source: 6,13)
Potentially Less Than Less Than No
Significant Significant Significant Impact
Impact with Impact
Mitigation
Incorporation
X
X
X
X
X
X
X
X
X
X
Initial Study/Mitigated Negative Declaration for the Vargas Project
City of Dublin 29
March 2007
d) Be located on expansive soil, as defined in Table 18-1-B
of the Uniform Building Code (1994), creating substantial
risks to life or property? (Source: 6,13)
e) Have soils incapable of adequately supporting the use of
septic tanks or alternative waste water disposal systems
where sewers are not available for the disposal of waste
water? (Source: 6,13)
VII. HAZARDS AND HAZARDOUS MATERIALS --
Would the project:
a) Create a significant hazard to the public or the
environment through the routine transport, use, or disposal
of hazardous materials? (Source: 6)
b) Create a significant hazard to the pu~lic or the
environment through reasonably foreseeable upset and
accident conditions involving the release of hazardous
materials into the environment? (Source: 6)
c) Emit hazardous emissions or handle hazardous or acutely
hazardous materials, substances, or waste within one-quarter
mile of an existing or proposed school? (Source:6)
d) Be located on a site which is included on a list of
hazardous materials sites compiled pursuant to
Government Code Section 65962.5 and, as a result,
would it create a significant hazard to the public or the
environment? (Source: 6)
e) For a project located within an airport land use plan
or, where such a plan has not been adopted, within two
miles of a public airport or public use airport, would the
project result in a safety hazard for people residing or
working in the project area? (Source: 6)
f) For a project within the vicinity of a private airstrip,
would the project result in a safety hazard for people
residing or working in the project area? (Source: 6)
Potentially Less Than Less Than No
Significant Significant Significant Impact
Impact with Impact
Mitigation
Incorporation
X
.
X
X
X
X
X
X
X
Initial Study/Mitigated Negative Declaration for the Vargas Project
City of Dublin 30
March 2007
Potentially Less Than Less Than No
Significant Significant Significant Impact
Impact with Impact
Mitigation
Incorporation
X
g) Impair implementation of or physically interfere with
an adopted emergency response plan or emergency
evacuation plan? (Source: 6)
X
h) Expose people or structures to a significant risk of loss,
injury or death involving wildland fires, including where
wildlands are adjacent to urbanized areas or where
residences are intermixed with wildlands? (Source: 6)
VIII. HYDROLOGY AND WATER QUALITY -
Would the project:
X
a) Violate any water quality standards or waste discharge
requirements? (Source: 2,6)
X
b) Substantially deplete groundwater supplies or interfere
substantially with groundwater recharge such that there
would be a net deficit in aquifer volume or a lowering of
the local groundwater table level (e.g., the production
rate of pre-existing nearby wells would drop to a level
which would not support existing land uses or planned
uses for which permits have been granted)? (Source: 2,6)
X
c) Substantially alter the existing drainage pattern of the
site or area, including through the alteration ofthe
course of a stream or river, in a manner which would
result in substantial erosion or siltation on- or off-site?
(Source:2,6)
X
d) Substantially alter the existing drainage pattern of the
site or area, including through the alteration of the
course of a stream or river, or substantially increase the
rate or amount of surface runoff in a manner which would
result in flooding on- or off-site? (Source: 2,6)
X
e) Create or contribute runoff water which would exceed
the capacity of existing or planned stormwater drainage
systems or provide substantial additional sources of
polluted runoff? (Source: 2,6)
X
f) Otherwise substantially degrade water quality?
(Source: 2,6)
Initial Study/Mitigated Negative Declaration for the Vargas Project
City of Dublin 31
March 2007
g) Place housing within a 100-year flood hazard area as
mapped on a federal Flood Hazard Boundary or Flood
Insurance Rate Map or other flood hazard delineation map?
(Source: 1,2,6)
h) Place within a 100-year flood hazard area structures
which would impede or redirect flood flows? (Source:2,6)
i) Expose people or structures to a significant risk of loss,
injury or death involving flooding, including flooding as a
result of the failure of a levee or dam? (Source: 1,2,6)
j) Expose people or sturctures to a significant risk of loss,
injury or death involving inundation by seiche, tsunami, or
mudflow?
(Source: 1,6,13)
IX. LAND USE AND PLANNING - Would the project:
a) Physically divide an established community?
(Source: 1 ,6,7)
b) Conflict with any applicable land use plan, policy, or
regulation of an agency with jurisdiction over the project
(including, but not limited to the general plan, specific
plan, local coastal program, or zoning ordinance)
adopted for the purpose of avoiding or mitigating an
environmental effect? (Source: 1,6,7)
c) Conflict with any applicable habitat conservation plan
or natural community conservation plan? (Source: 1,6,7)
X. MINERAL RESOURCES -- Would the project:
a) Result in the loss of availability of a known mineral
resource that would be of value to the region and the
residents of the state? (Source: 4,6,7)
Potentially Less Than Less Than No
Significant Significant Significant Impact
Impact with Impact
Mitigation
Incorporation
X
X
X
X
X
X
X
X
Initial Study/Mitigated Negative Declaration for the Vargas Project
City of Dublin 32
March 2007
b) Result in the loss of availability of a locally-important
mineral resource recovery site delineated on a local
general plan, specific plan or other land use plan?
(Source: 4,6,7)
XI. NOISE - Would the project result in:
a) Exposure of persons to or generation of noise levels in
excess of standards established in the local general plan
or noise ordinance, or applicable standards of other
agencies? (Source: 6)
b) Exposure of persons to or generation of excessive
groundborne vibration or groundborne noise levels?
(Source: 6)
c) A substantial permanent increase in ambient noise
levels in the project vicinity above levels existing without
the project? (Source: 6)
d) A substantial temporary or periodic increase in
ambient noise levels in the project vicinity above levels
existing without the project? (Source: 6)
e) For a project located within an airport land use plan
or, where such a plan has not been adopted, within two
miles of a public airport or public use airport, would the
project expose people residing or working in the project
area to excessive noise levels? (Source: 1,6)
f) For a project within the vicinity of a private airstrip,
would the project expose people residing or working in
the project area to excessive noise levels? (Source: 1,6)
XII. POPULATION AND HOUSING-
Would the project:
Potentially Less Than Less Than No
Significant Significant Significant Impact
Impact with Impact
Mitigation
Incorporation
X
X
X
X
X
X
X
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March 2007
a) Induce substantial population growth in an area,
either directly (for example, by proposing new homes and
businesses) or indirectly (for example, through extension
of roads or other infrastructure)? (Source: 6,8)
b) Displace substantial numbers of existing housing,
necessitating the construction of replacement housing
elsewhere? (Source: 3)
c) Displace substantial numbers of people, necessitating
the construction of replacement housing elsewhere?
(Source: 3,8)
XIII. PUBLIC SERVICES
a) Would the project result in substantial adverse
physical impacts associated with the provision of new or
physically altered governmental facilities, need for new
or physically altered governmental facilities, the
construction of which could cause significant
environmental impacts, in order to maintain acceptable
service ratios, response times or other performance
objectives for any of the public services:
Fire Protection? (Source: 2,6)
Police Protection? (Source: 2,6)
Schools? (Source: 2,6)
Parks? (Source: 2,6)
Other Public Facilities? (Source: 2,6)
XIV. RECREATlON--
a) Would the project increase the use of existing
neighborhood and regional parks or other recreational
facilities such that substantial physical deterioration of
the facility would occur or be accelerated? (Source:2,6)
Potentially Less Than Less Than No
Significant Significant Significant Impact
Impact with Impact
Mitigation
Incorporation
X
X
X
X
X
X
X
X
X
X
Initial Study/Mitigated Negative Declaration for the Vargas Project
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March 2007
b) Does the project include recreational facilities or
require the construction or expansion of recreational
facilities which might have an adverse physical effect on
the environment? (Source: 2,6)
XV. TRANSPORT A TION/TRAFFIC -
Would the project:
a) Cause an increase in traffic which is substantial in
relation to the existing traffic load and capacity of the
street system (i.e., result in a substantial increase in either
the number of vehicle trips, the volume to capacity ratio
on roads, or congestion at intersections)? (Source: 14)
b) Exceed, either individually or cumulatively, a level of
service standard established by the county congestion
management agency for designated roads or highways?
(Source: 14, 15)
c) Result in a change in air traffic patterns, including
either an increase in traffic levels or a change in location
that results in substantial safety risks? (Source: 14)
d) Substantially increase hazards due to a design feature
(e.g., sharp curves or dangerous intersections) or
incompatible uses (e.g., farm equipment)? (Source: 14)
e) Result in inadequate emergency access? (Source: 14)
f) Result in inadequate parking capacity? (Source: 14)
g) Conflict with adopted policies, plans, or programs
supporting alternative transportation (e.g., bus turnouts,
bicycle racks)? (Source: 14)
XVI. UTILITIES AND SERVICE SYSTEMS --
Would the project:
Potentially Less Than Less Than No
Significant Significant Significant Impact
Impact with Impact
Mitigation
Incornoration
X
X
X
X
X
X
X
.
X
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March 2007
a) Exceed wastewater treatment requirements of the
applicable Regional Water Quality Control Board?
(Source: 2,6)
b) Require or result in the construction of new water or
wastewater treatment facilities or expansion of existing
facilities, the construction of which could cause
significant environmental effects? (Source: 2,6,7)
c) Require or result in the construction of new storm
water drainage facilities or expansion of existing
facilities, the construction of which could cause
significant environmental effects? (Source: 2,6,7)
d) Have sufficient water supplies available to serve the
project from existing entitlements and resources, or are
new or expanded entitlements needed? (Source: 2,6,7)
e) Result in a determination by the wastewater treatment
provider which serves or may serve the project that it has
adequate capacity to serve the project's projected
demand in addition to the provider's existing
commitments? (Source: 2,6,7)
f) Be served by a landfill with sufficient permitted
capacity to accommodate the project's solid waste
disposal needs? (Source: 2,6,7)
g) Comply with federal, state, and local statutes and
regulations related to solid waste? (Source: 2,6,7)
Potentially Less Than Less Than No
Significant Significant Significant Impact
Impact with Impact
Mitigation
Incorporation
X
.
X
X
X
X
X
X
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March 2007
XVII. MANDATORY FINDINGS OF SIGNIFICANCE-
Potentially Less Than Less Than No
Significant Significant Significant Impact
Impact with Impact
Mitigation
Incorporation
X
X
X
a) Does the project have the potential to degrade the quality
of the environment, substantially reduce the habitat of a
fish or wildlife species, cause a fish or wildlife population
to drop below self-sustaining levels, threaten to eliminate
a plant or animal community, reduce the number or restrict
the range of a rare or endangered plant or animal or
eliminate important examples of the major periods of
California history or prehistory?
b) Does the project have impacts that are individually
limited, but cumulatively considerable? ("Cumulatively
considerable" means that the incremental effects of a
project are considerable when viewed in connection with
the effects of past projects, the effects of other current
projects, and the effects of probable future projects)?
c) Does the project have environmental effects
which will cause substantial adverse effects on
human beings, either directly or indirectly?
Sources used to determine potential environmental impacts:
1. Location ofproject.
2. Discussion with City Staff or affected special districts.
3. Field review.
4. City of Dublin General Plan.
5. City of Dublin Zoning Ordinance.
6. Eastern Dublin EIR.
7. Eastern Dublin Specific Plan.
8. Stage 1 Development Plan.
9. Eastern Dublin Scenic Corridor Policies and Standards.
10. Biological Resources Analysis dated August 2006.
11. Tree Report.
12. Cultural Resources Analysis dated July 2006.
13. Geotechnical Report dated July 2006.
14. Moller Ranch/Casamira Valley Traffic Study dated July 2006.
15. Dublin Ranch West Draft Supplemental Environmental Impact Report.
16. Discussions with Jeff Olberding of Olberding Enyironmental, Inc.
Initial Study/Mitigated Negative Declaration for the Vargas Project
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March 2007
17. Eastern Dublin San Joaquin Kit Fox Protection Plan.
18. City's GIS maps and information.
19. Eastern Dublin Comprehensive Stream Restoration Program.
20. Bay Area Air Quality Management District CEQA Guidelines.
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March 2007
Discussion of Checklist
Legend
PS:
LS/M:
LS:
N1:
Potentially Significant
Less Than Significant After Mitigation
Less Than Significant Impact
No Impact
The following information is provided for the environmental checklist.
I. Aesthetics
The Vargas property is located near the border of Alameda and Contra Costa County. The property is
located adjacent to the Tassajara Creek (located outside of the property line) and a Stream Corridor/Open
Space area (the stream corridor designation is in the General Plan and the open space designation is from the
Eastern Dublin Specific Plan). The property slopes down from a small hill where the existing house sits to a
flat portion located between Tassajara Road and the creek. The flat portion currently sits below Tassajara
Road and gently slopes down to the property line where the land then drops off to the Tassajara Creek. The
Tassajara Creek sits outside of the property, however, the Creek is adjacent to the property and the top of the
bank is visible from Tassajara Road.
The property is also located within the Eastern Dublin Scenic Corridor and development must conform to
the Eastern Dublin Specific Plan Policy 6-39 and the adopted Eastern Dublin Scenic Corridor Policies and
Programs (EDSCPP). The Vargas property is located within Zone 4: Tassjara Village (Figure 5 of the
EDSCPP). The purpose of the EDSCPP is to allow project development to occur in the area while
maintaining the visual character of the ridgelands, watercourses and distinct landscape features for travelers
on the designated scenic routes.
The Vargas property does not have any visually sensitive ridgelands on the property (see Figure 6.3 in the
Eastern Dublin EIR). There are visually sensitive ridgelands on the Moller Ranch/Casamira Valley site, east
of the property, however, due to the location of these ridgelands, the proposed Project will not interfere with
views of these visually sensitive ridgelands. Additionally, during the Stage 2 and Site Development Review
phases of the project when more detailed architectural drawings are submitted, the City will ensure that the
design of the project uses high quality design and visual character pursuant to Policy 6-31 in the Eastern
Dublin Specific Plan.
The Vargas property is partially blocked from view on northbound Tassajara Road by the large knoll on the
Fredrich property. As mentioned above, the top of the creek bank of the Tassajara Creek is visible from
Tassajara Road and some of the riparian plantings including Heritage Trees (located off of the property) are
visible from the road.
The Eastern Dublin Environmental Impact Report discusses impacts 3.8/A, Standardized "Tract
Development," 3.8/B, Alteration of Rural/Open Space Visual Character, 3.8/C, Obscuring Distinctive
Natural Features, 3.8/G, Alteration of Visual Character of Watercourses and 3.8/J, Scenic Routes, which
relate to development of this site as a residential community. These impacts relate to the change in the site
from a rural use to a more dense residential development and the impact of the development to the existing
Initial Study/Mitigated Negative Declaration for the Vargas Project March 2007
City of Dublin 39
view from Tassajara Road. The Eastern Dublin Specific Plan and the Eastern Dublin EIR contain policies
and mitigation measures (discussed in more detail below) which reduce these impacts so that the
development is well designed, relates well to the surrounding area, preserves natural features on the site and
therefore protects the existing view from Tassajara Road in accordance with the Eastern Dublin Scenic
Corridor Policies and Programs.
a) Have a substantial adverse impact on a scenic vista? LS/M. The project site is located within the
Eastern Dublin Scenic Corridor, as defined by the adopted Eastern Dublin Scenic Corridor Policies
and Programs (EDSCPP). As discussed above, the existing property sits below Tassajara Road on a
large portion of the property with the house sitting on a small hill. The Stage 1 Development Plans
shows that much of the property will be regraded and small hill will be removed. The property
located to the south of this property features a hill/knoll and the Tassajara Creek is located to the
west of the property.
The Eastern Dublin EIR contains Mitigation Measure 3.8/3.0, related to obscuring distinctive
natural features, which requires development in Eastern Dublin to preserve views of distinctive
natural features such as hills, stands of trees, and creeks.
As shown on the conceptual site plan (contained in the Stage 1 Development Plan, Exhibit 8), the
parcels will be setback a minimum of 100 feet from the top of the creek bank in order to preserve
views of the Creek inside the development and to allow views of the Tassajara Creek from
Tassajara Road. The minimum 100 foot setback and placement of the parcels, as shown on the
Stage 1 Development Plan, will ensure that travelers on Tassajara Road can see the top of the creek
bank (similar to the view from Tassajara Road today) from the two entrances into the project.
The intent of the Eastern Dublin Scenic Corridor Policies and Prorgams document is to maintain
the visual character ofthe ridgelands, watercourses and distinct landscape features for travelers on
the designated scenic routes while allowing development in the area. The following mitigation
measures are included to ensure that the design of the residential development including the height
ofthe units will preserve the existing views of the Tassajara Creek to ensure that development of
the Project complies with these requirements and the requirements of the Eastern Dublin Specific
Plan which will reduce visual impacts to a less than significant level:
Mitigation Measure 1: A visual survey/analysis of the development shall be
submitted in conjunction with the Stage 2 Rezone and Site Development Review to
ensure that the proposed development including design, height and location complies
with the Eastern Dublin Scenic Corridor Policies and Programs and that views of the
creek bank from Tassajara Road are maintained. Additionally, the visual analysis
shall show that distinctive natural features will be visible once the development is
complete.
Mitigation Measure 2: The Stage 2 Rezone and Site Development Review plans
shall show that residential development shall be designed to retain as much of the
existing topography as possible. The residential development shall comply with the
Eastern Dublin Scenic Corridor Policies and Standards which require projects to
maintain the visual character of the ridgelands, watercourses and distinct landscape
Initial Study/Mitigated Negative Declaration for the Vargas Project
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March 2007
features for travelers on the designated scenic routes.
b) Would the Project have a substantial impact on a state scenic highway? NI. The project site is not
located adjacent to a state designated scenic highway.
c) Substantially degrade existing visual character or the quality of the site? LS/M. As noted above,
the property is located in a unique area which offers many visual resources to the community.
Additionally, the change in use on the site from rural residential to a medium density residential
development will alter the existing character of the site.
The existing site does have a rural residential character due to the small house, accessory
structures, open landscape and horse barn. Development of the site to a residential development
with 33 dwelling units will significantly impact the existing rural character of the site by
eliminating the existing buildings and constructing the new development.
The Eastern Dublin EIR identified several visual resources impacts and contains related mitigation
measures in Section 3.8 which are aimed at reducing visual impacts on the City. Mitigation
Measures 3.8/4.0-4.5 aim to minimize grading of project sites and requires developers to retain as
much of the natural grade as possible and the proposed Project will comply because the amount of
grading on the site will be limited as shown on the preliminary grading plan in the Stage 1
Development Plan. Mitigation Measure 3.8/6.0 requires the development to be sited in such a
manner as to maintain visual access of the creek. Mitigation Measure 3.8/8.1 requires the
developer to submit a detailed visual analysis of the project during the Site Development Review
process, when detailed house plans will be provided, to ensure that the height of the units do not
detract views of the site.
Additionally, compliance with Mitigation Measure 1 and 2 will reduce visual impacts resulting
from development on the site and will ensure that development on the site will conform to the
adopted Eastern Dublin Scenic Corridor Policies and Standards.
Although these mitigation measures will limit impacts of the development on the existing rural
character of the site, the loss of the character of the site is a significant impact that cannot be
mitigated. A Statement of Overriding Considerations was adopted for Impact 3.8/B, Alteration of
Rural/Open Space Visual Character, in the Eastern Dublin EIR related to the loss of the rural
character of this area which is a significant and unavoidable impact due to development of the
property.
d) Create light or glare? LS/M. New street lighting related to the construction ofa residential
development will result in an increase in the amount of light and glare on the site and in the
surrounding area. In some instances, the additional lighting could result in negative aesthetic
impact through the "spill over" of unwanted lighting onto adjacent residential properties. The
following mitigation measure is included to reduce spillover ofIighting impacts to a less-than-
significant level:
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March 2007
Mitigation Measure 3: Pole-mounted street lights shall be equipped with cut-off
lenses and oriented down toward interior streets to minimize unwanted light and glare
spill over.
II. Agricultural Resources
Historically, the site was used for grazing purposes prior to the 1960's (these activities may have ceased as
early as the 1940's). In the 1960's, the site was developed with a house and related accessory structures and
agriculture uses were discontinued at that time. The site is currently used for a residential dwelling unit and
a contractor construction storage yard. Although the County of Alameda zoning designation for this property
is Agriculture, the General Plan and the Eastern Dublin Specific Plan designated this land for future
residential development.
The Eastern Dublin Environmental Impact Report identifies impacts 3.1/C, Discontinuation of Agricultural
Uses and 3.1/D, Loss of Farmland of Local Importance as less than significant, which relate to the
development of this site and the loss in any potential agricultural uses that may have occurred on the site in
the future if the site was not developed as a residential development.
The Eastern Dublin Environmental Impact Report identified the Vargas property as having an existing rural
residential land use (Figure 3.I-A in the Eastern Dublin EIR), the Eastern Dublin EIR further identified the
Vargas property as being suitable for agriculture and "locally important farmland'; (see Figure 3.1-B). The
property is small in size, 4.38 acres (5.0 gross acres), and therefore is not eligible to be enrolled in the
Williamson Act. The small size of the property makes it unlikely that the parcel would be able to support
profitable agricultural operations on it. Additionally, the site is not classified as Prime Farmland, Unique
Farmland or Farmland of Statewide Importance.
Project Impacts
a-c) Convert Prime Farmland, conflict with agricultural zoning or involve other changes which could
result in conversion offarmland to a non-agricultural use? LS. Although Figure 3.1-B in the
Eastern Dublin EIR identifies this property as being "locally important farmland," the property is
small in size and is not suitable to support commercial agricultural uses. As previously discussed,
agricultural uses were discontinued on the site when the site was split from the Rancho San
Ramon. In recent years, the site has been used for residential uses and a contractors construction
storage yard. The site has been designated as being "locally important farmland," and the Eastern
Dublin EIR noted that the Agricultural Suitability Map for Eastern Dublin, prepared by the Soil
Conservation Service, found that no soils in Eastern Dublin supported Prime Farmland or
Farmlands of Statewide Importance. As noted in Figure 3.1-B of the Eastern Dublin EIR, the
Project site is shown as being "locally important farmland" and is not classified as Prime
Farmland, Unique Farmland or Farmland of Statewide Importance. Pursuant to CEQA, the loss of
farmland is only considered to be significant if the loss in farmland falls into one of those three
categories. Additionally, the proposed Project includes the construction of a residential
development which is consistent with the General Plan and the Eastern Dublin Specific Plan.
Any potential future agricultural use of this property will be lost as a result of the proposed
development as analyzed and found less than significant in the Eastern Dublin EIR. The Project
proposes no additional or different development beyond that assumed in the Eastern Dublin EIR,
Initial Study/Mitigated Negative Declaration for the Vargas Project March 2007
City of Dublin 42
and results in no agricultural resources impacts beyond those in the Eastern Dublin EIR. A
Statement of Overriding Considerations was adopted for Impact 3.1/F, Cumulative Loss of
Agricultural and Open Space Lands in the Eastern Dublin EIR.
ITI. Air Quality
Dublin is located in the Tri -Valley Air Basin. Within the Basin, state and federal standards for nitrogen
dioxide, sulfur dioxide and lead are met. Standards for other airborne pollutants, including ozone, carbon
monoxide and suspended particulate matter (PM-I0) are not met in at least a portion of the Basin.
The document Bay Area Air Quality Management District (BAAQMD) CEQA Guidelines were published
after the Eastern Dublin EIR was certified by the City Council. The guidelines establish the following
criteria; which are the significance criteria for the purposes of this initial study (BAAQMD 1999).
· A significant impact on local air quality is defined as an increase in carbon monoxide concentrations
that causes a violation of the most stringent ambient air quality standard for carbon monoxide (20
ppm for the one-hour averaging period, 9.0 ppm for the eight-hour averaging period).
· A significant impact on regional air quality is defined as an increase in emission of an ozone
precursor or PMIO exceeding the BAAQMD thresholds of significance or 80 pounds per day or 15
tons per year for ozone precursors or PMIO.
· Any proposed project that would individually have a significant air quality impact would be
considered to have a significant cumulative air quality impact.
· Any project with the potential to frequently expose the public to objectionable odors would be
deemed to have a significant impact.
The Eastern Dublin EIR identifies significant impacts 3.111 A, Dust Deposition Soiling Nuisance from
Construction Activity, 3.11/B, Construction Equipment/Vehicle Emissions, 3.llIC, Mobile Source
Emissions: ROG or NOx, 3.1 liE, Stationary Source Emissions which apply to the proposed Project. Related
mitigation measures continue to apply to implementing projects such as the proposed Project.
Since preparation of the Eastern Dublin EIR there have been several regulatory changes, changes in the
methods of air quality analysis and changes to applicable thresholds of environmental significance.
Changes to the Regulatory Setting
Ambient Air Quality Standards. The Federal and California ambient air quality standards are summarized in
the table below for important pollutants and have changed since certification of the Eastern Dublin EIR. The
federal and state ambient standards were developed independently with differing purposes and methods,
although both federal and state standards are intended to avoid health-related effects. As a result, the federal
and state standards differ in some cases. In general, the California state standards are more stringent.
Initial Study/Mitigated Negative Declaration for the Vargas Project
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March 2007
Table 2: Federal and State Ambient Air Quality Standards
Avera in Time
1 Hour
8 Hour
24 Hour
Annual
24 Hour
Annual
8 Hour
I Hour
Annual
1 Hour
Annual
24 Hour
3 Hour
1 Hour
30 Da Avera e
Calendar Quarter
Source: California Air Resource Board (as of 5/17/06)
Pollutant
Ozone (03)
Respirable Particulate
Matter (PMIO)
Fine Particulate Matter
(PMzs)
Carbon Monoxide (CO)
Nitrogen Dioxide (NOz)
Sulfur Dioxide (SOz)
Lead
Sensitive Receptors
California Standards
0.09 m
0.070
50 ug/m
20u m
Federal Standards
m
0.25
m
0.04
0.030 m
0.14
m
1.5 u m
The Bay Area Air Quality Management District defines sensitive receptors as facilities where sensitive
receptor groups (children, the elderly, the acutely ill and the chronically ill) are likely to be located. These
land uses include residences, schools, playgrounds, child-care centers, retirement homes, convalescent
homes, hospitals and medical clinics.
Project Impacts
a) Would the project conflict or obstruct implementation of an air quality plan? NI. The proposed
Project would generate additional vehicular traffic to and in Dublin and the Tri- Valley area. The
associated vehicular trips would generate carbon monoxide, reactive organic gasses, nitrogen
oxide, sulfur dioxide and particulate matter (PMIO).
The proposed project would not conflict with the local Clean Air Plan adopted by the Bay Area Air
Quality Management District because the Clean Air Plan is based on local general plans and the
Dublin General Plan which designates the site as a residential development with up to 110
dwelling units. Further, the Eastern Dublin EIR analysis assumed residential densities at the
midpoint of the general plan range, and thus would have assumed approximately 55 units for the
Project site. The number of dwelling units on the site has been reduced to 36 units pursuant to the
Stage 1 Development Plan and the General Plan Amendment and Specific Plan Amendment to
reduce density on the site to Medium-Density Residential. Therefore, the project conforms to and
would not conflict with or obstruct implementation of the Bay Area Air Quality Management
District's Clean Air Plan.
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b) Would the project violate any air quality standards? LS/M. During the construction of the building
and site improvements air quality standards could be exceeded as a result of dust and equipment
emissions. Consistent with construction Impacts 3.11/A and B in the EDEIR, the Project will be
required to conform to Mitigation Measures 3.11/1.0 - 3.11/4.0 in the Eastern Dublin EIR which
requires construction equipment emission control and dust reduction measures during construction
of the project. The Project will also be required to comply with Mitigation Measures 3.11/12.0-13,
for Stationary Source Emissions Impact 3.11IE of the EIR, which require the development to be
designed to include energy conserving features, such as insulation and energy star appliances,
which will be reviewed during the Building Permit stage when formal house plans with
construction details will be submitted..
Despite the establishment of both federal and state standards for PM2.5 (particulate matter, 2.5
microns), the BAAQMD has not development a threshold of significance for this pollutant in the
BAAQMD CEQA Guidelines. For this analysis, PM25 impacts would be considered significant if
project emissions of PM 10 exceed 80 pounds per day. The BAAQMD CEQA Guidelines are
incorporated herein by reference and are available for review in the Planning Division in City Hall
located at 100 Civic Plaza during normal business hours.
The current BAAQMD significance threshold for construction dust impact is based on the
appropriateness of construction dust controls. The BAAQMD CEQA Guidelines provide feasible
control measures for construction emission ofPMIO.
Construction activities, including grading, would have the potential to cause nuisance relate to dust
and PMIO. The current BAAQMD significance threshold for construction dust impact is based on
the appropriateness of construction dust controls. If the appropriate construction controls are
implemented, then air pollutant emissions for construction activities would be considered less
significant. Mitigation Measure 3.11/1.0 in the Eastern Dublin EIR implements most, but not all,
of the currently recommended dust emission reduction measures.
In addition to the mitigation measures identified in 3.11/1.0 of Eastern Dublin EIR that will be
incorporated into the Project to reduce dust emissions, the Project must adhere to the following
mitigations during construction of the Project to reduce impacts related to construction air quality
to a less than significant level. Compliance with these measure will be reviewed during the
Building Permit stage when the contractor will be required to submit a dust emission control plan
and the City will verify compliance with these measures during construction.
Mitigation Measure 4: Construction contractors shall water or cover stockpiles of
debris, soil and other materials that can be blown by the wind during construction of
the development.
Mitigation Measure 5: Construction contractors shall sweep (preferably with water
sweepers) all paved access roads, parking areas and staging areas at construction sites
daily.
Mitigation Measure 6: Construction contractors shall install sandbags or other
erosion control measures to prevent silt runoff to public roadways.
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March 2007
According to the BAAQMD CEQA guidelines, implementation of the above mitigation measures
would reduce construction period air quality impacts to a less than significant level.
A Statement of Overriding Considerations was adopted upon approval of the Eastern Dublin
project because the EIR assumed that cumulative air quality impacts as a result of construction
equipment could not be reduced to a less than significant impact even with mitigation (Impact
3.11A, Dust Deposition Soiling Nuisance from Construction Activity, and B, Construction
Equipment/Vehicle Emissions, in the Eastern Dublin EIR).
Similarly, the Eastern Dublin EIR indicates that air quality impacts related to mobile source
emission of Reactive Organic Gasses and Nitrogen Oxide, both precursor indicators of smog, and
stationary source emission were found to exceed regional air quality standards even with mitigation
measures and were included in the Statement of Overriding Considerations (Impacts 3.1l1C and
3.1 liE). The Project is substantially smaller than the project assumed in the Eastern Dublin EIR,
but is not small enough to reduce Impacts 3.1l1C and E to a less than significant level based on the
reduction estimated in the Eastern Dublin EIR as necessary to avoid significant impacts.
c) Would the project result in cumulatively considerable air pollutants? LS. A previously discussed,
the proposed Project proposes to construct 33 units which is lower than the number of units (55,
the midpoint range) studied in the Eastern Dublin EIR for this property. The ozone contributed by
this project would be lower than what was studied in the EIR for the Eastern Dublin General Plan
Amendment/Specific Plan Amendment and therefore, there would be a cumulative decrease in
pollutants from what was previously determined in the Eastern Dublin EIR resulting from this
Project and no further analysis is required.
d) Would the project expose sensitive receptors to substantial pollutant concentrations? LS. The
proposed Project would expose residents and sensitive receptors to air emission from mobile
sources, including reactive organic gasses, nitrogen oxides and particulates. However, if the
proposed Project is approved, a total of33 dwelling units will be constructed on the Vargas
property which is 22 units less than what was studied in the Eastern Dublin EIR (and significantly
lower than the 110 units which are permitted by the current land use designations). The proposed
Project is small in size and is lower than what was studied in the Eastern Dublin EIR . The
BAAQMD considersPMIO emissions of 80 pound per day to be a substantial pollutant. In this
case, due to the total number of daily trips (250), the Project would generate significant less than
80 pounds p~r day.
e) Would the project create objectionable odors? LS. The proposed Project includes typical
residential uses which do not typically create objectionable odors.
IV. Biological Resources
A biological survey of Eastern Dublin was conducted in 1989 in conjunction with the Eastern Dublin EIR. A
detailed site biological analysis of the Project site was conducted by Olberding Environmental, Inc. in June
2006, attached as Appendix A to this Mitigated Negative Declaration and incorporated herein by reference,
and the information in this section is based on that analysis. The Analysis is also available for review at City
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City of Dublin 46
March 2007
Hall in the Planning Division during normal business hours. Olberding Environmental conducted site visits
and reviewed available information to determine ifthere were any special status species or habitats on the
site.
The Eastern Dublin EIR classifies the Project site as a ruderal field (see Figure 3.7-A in the Eastern Dublin
EIR). The EIR further defines a ruderal field as an area consisting of native and non-native species
predominantly consisting of introduced weeds such as thistles, mustards and grasses. The biological analysis
notes that the property consists mainly of grazed non-native grassland habitat. This habitat is common in
California as the result of human alteration of the perennial grasslands by grazing, fire suppression and the
introduction of exotic annual grasses and weed species.
The existing property contains a house and accessory structures and was used for grazing purposes in the
past. The property currently contains a house and related residential accessory structures, a horse barn and a
accessory structures related to a contractors storage yard. Debris is strewn across the northern portion of the
property.
The northern portion of the property has very few buildings and has an open space feel. Nonnative trees and
low shrubs are scattered throughout the site and the site has non native grasses. No heritage trees are located
on the site. The Tassajara Creek is located adjacent to the property on the west side (outside the property).
The property is dominated by flatlands with a small mound where the existing house and garage are located.
The land has a gently sloping topography with elevations ranging between 466 feet (at the creek bank) to
498 feet (at Tassajara Road). The land is currently used as a storage yard, for residential uses and for horse
grazing which leaves little or no vegetation in some areas.
The Eastern Dublin EIR identifies impacts 3.7/A, Direct Habitat Loss, 3.7/B, Indirect Impacts of Vegetation
Removal, 3.7/C, Loss or Degradation of Botanically Sensitive Habitat, 3.7/D, San Joaquin Kit Fox, 3.7/F,
Red-legged Frog, 3.7/G California Tiger Salamander, 3.7/M, Burrowing Owl which may relate to the
development of the site including impacts related to grading and construction activities. All mitigation
measures adopted for these impacts continue to apply to this Project.
Riparian Habitat
The Tassajara Creek is located adjacent to the property on the west side (outside the property line, see
Exhibit 8). Trees are located on the creek bank and adjacent to the property line. The arroyo willow is the
dominant riparian tree species and forms dense thickets across and along the waterway. Live Oak trees form
the border around the riparian habitat. The edge of the riparian area is vegetated with mugwort, poison oak,
blackberry and annual grasses. The location of these trees may be found in the arborist report attached as
Appendix B, incorporated herein.
Wetlands
A jurisdictional delineation of Waters ofthe United States has been submitted to the United States Army
Corps of Engineers (US ACE) for the Vargas property, but the USACE has not yet verified this delineation.
The Section 404 Delineation Map submitted to the USACE indicates that approximately .483 acres of
USACE jurisdictional habitats have been identified on the Vargas property. The location of these wetlands
can be found in Exhibit 12.
Plants
March 2007
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City of Dublin 47
Annual grass lands are found on sloping hills and flat lands throughout the property. The grassland habitat
found on the property is dominated by wild oat, ripgut brome and soft chess. Broafleaf plants are also
located on the property and consist of winter vetch, red-stemmed filaree and sheep sorrel. Plant species
observed by Olberding Environmental on the site can be found in Table 1 of Appendix A. No special status
plants were observed on the site.
Animals
The habitat with grassland and some open areas and trees may provide a suitable habitat for wildlife species.
The habitat does provide a good habitat for amphibians, reptiles, birds and mammals. The occurrence of
these species however is limited based on the existing condition of the property and its historical use as
grazing land and current use, as a residential property with horses and a contractors storage yard, which has
damaged the habitat of a portion of the property due to the construction of accessory structures, trucks, roads
and debris which is strewn on the northern portion of the property. Animal species observed by Olberding
Environmental on the site can be found in Table 1 of Appendix A. No foraging or nesting raptor species,
special status reptiles or amphibians or special status mammals were observed on the site.
Project Impacts
a) Would the Project have a substantial adverse impact on a candidate, sensitive or special status
species? LS/M. As discussed in the section above, a Biological Resources Analysis was conducted
by Olberding Environmental. The Analysis also included a sit visit to determine if any special
status plants or animals were located on the site. The Analysis and site visit determined that there
are no special status plants or animals presently on the site. Construction of the Vargas project is
not anticipated to begin for a minimum of two years based on the estimated time to process the
annexation request and subsequent Site Development Review, Subdivision Maps and Building
Permit. Because construction is not anticipated to occur for a minimum of two years, there is the
potential for special status plants or animals to move to the site due to construction projects in the
area including the Wallis Ranch (Dublin Ranch West) project. If these species move to the site,
they could be adversely affected by Project construction activities. This is a potentially significant
impact.
Raptors. A raptor survey was conducted on the property as part of the biological analysis. The
survey as conducted to determine if Golden Eagles (California Species of Concern), Red-Tailed
Hawk (State Protected species), Red-Shouldered Hawk (Stated Protected species), Northern
Harrier (California Species of Concern), American Kestrel (State Protected species), Cooper's
Hawk (State Protected species), Sharp-Shinned Hawk (State Protected species) or the White-Tailed
Kite (Federal Species of Concern and California Department of Fish and Game Fully Protected
species) were located on the site.
No raptor nests were discovered on the Project site or adjacent to the property. A red-tailed hawk
was observed on the site during the raptor survey, however a nest was not found on or adjacent to
the site. Although raptor nests were not discovered during the survey, there are trees, located
adjacent to the property which may provide a suitable habitat for raptor nesting and raptors could
forage on the site in the future. As discussed above, because construction of the site is not
anticipated to begin for several ~ears, raptors may forage on the property in the future. Although
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City of Dublin 48
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raptor nests were not on the site during the raptor survey, the following Mitigation Measure has
been included to ensure that the development will not harm raptor nests in the future in the event
that raptor nests may locate in the area based on the discussion in this section, and will reduce
potential impacts to less than significant:
Mitigation Measure 7: A pre-construction survey shall be conducted for nesting
raptors prior to the start of grading or construction within 100 feet of any known
nesting tree(s). If eggs have been laid, a buffer shall be established around the nest
tree and the site shall be protected from January 1 until August 1, or until the young
have fledged. The buffer shall be determined by a qualified biologist (as determined
by the City). If a known nesting tree or vegetation is removed, it shall only occur
during the raptor non-breeding season which occurs from the months of October to
December.
California Red-Legged Frog. The Tassajara Creek located adjacent to the property is considered to
be a potentially suitable breeding habitat for the California Red-Legged Frog (a Federally
Threatened and California Species of Concern) because the creek contains abundant emergent
vegetation that is appropriate breeding habitat. The California Red-Legged Frog has been observed
off of the project site in 1992 on the Tassajara Creek at a location that is within a mile of the
property. A sighting in 1998 was located within a mile of the property within the east fork of the
Tassajara Creek, approximately 0.4 miles northeast of the property. The California Red-Legged
Frog has also been documented in pool habitat within a tributary to Tassajara Creek located
approximately 0.5 miles southwest of the property (1999 sighting). This species was not observed
during the 2006 biological survey conducted by Olberding Environmental.
As discussed above, because construction of the site is not anticipated to begin for several years,
the California Red-Legged Frog may locate on the property in the future. The following Mitigation
Measure has been included to ensure that the development will not harm the California Red-
Legged Frog in the future in the event that California Red-Legged Frog locates in the area based on
the discussion in this section and will reduce potential impacts to less than significant:
Mitigation Measure 8: A pre-construction survey to determine if there are California
Red-Legged. Frogs one or near the site shall be conducted no more than 60 days prior
to construction or grading on the Project site. A copy of the survey report shall be
submitted to the Community Development Department for review prior to the
issuance of any grading or Building Permit. Should the survey determine that these
species are located on the site, the developer shall work with the Community
Development Department, a qualified biologist (as determined by the City) and the
Department of Fish and Game and Fish and Wildlife Service to determine any
additional measures that shall be placed on the project to avoid impacts to these
speCIes.
California Tiger Salamander. The annual grasslands on the site are potentially suitable aestivation
habitat for the California Tiger Salamander (a Federal Threatened and Endangered Species and a
California Species of Concern). California ground squirrel burrows located on the property could
also serve as aestivation habitat. In 1998, California Tiger Salamander larvae were documented at a
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stock pond located 1.4 miles south of the Vargas property. An adult California Tiger Salamander
was documented immediately west of Tassajara Creek in 1997 at a location that is 0.6 miles north
of the County Rehabilitation Center at a distance of 1.4 miles southwest of the property. In 2000,
California Tiger Salamander were documented at a stock pond located 0.7 miles east of Tassajara
Road and 0.7 miles south of the Alameda/Contra Costa County line, 0.71 miles north of the
property. This species was not observed during the 2006 biological survey conducted by Olberding
Environmental. The developer of the Project will be required to construct a pre-construction survey
60 days prior to construction to determine if there are any California Tiger Salamanders on the site
in accordance with Mitigation Measure 3.7/20.0 in the Eastern Dublin EIR and Mitigation Measure
8 included in this Mitigated Negative Declaration.
As discussed above, because construction of the site is not anticipated to begin for several years,
the California Tiger Salamander may locate on the property in the future. The following Mitigation
Measures have been included to ensure that the development will not harm the California Tiger
Salamander in the future in the event that species locates on the Project site prior to construction of
the development and will reduce potential impacts to less than significance:
Mitigation Measure 9: A pre-construction survey to determine ifthere are California
Tiger Salamanders on or near the site shall be conducted no more than 60 days prior
to construction or grading on the Project site. A copy of the survey report shall be
submitted to the Community Development Department for review prior to the
issuance of any grading or Building Permit. Should the survey determine that these
species are located on the site, the developer shall work with the Community
Development Department, a qualified biologist (as determined by the City) and the
Department of Fish and Game and Fish and Wildlife Service to determine any
additional measures that shall be placed on the project to avoid impacts to these
speCIes.
Mitigation Measure 10: If the California Tiger Salamander is found within or close
to the area proposed for grading and/or construction and could, in the opinion of the
resource agency be impacted, a California Tiger Salamander management plan shall
be prepared by. a qualified biologist (as determined by the City) and the Project
developer and shall be approved by the California Department of Fish and Game and
the United States Fish and Wildlife Service prior to the start of construction. The plan
shall detail how the California Tiger Salamander will be managed before and during
construction activities and shall include the following:
1) Installation of a temporary herpetological fence prior to any ground
disturbance around the entire development footprint, or the area designated by
the resource agencies which shall prevent the California Tiger Salamander from
entering the construction site and shall remain in place until a permanent fence
or barrier approved by the resource agencies is installed. A maintenance
schedule for the temporary fences shall also be provided.
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2) A trapping and relocation plan shall be prepared that details how aestivating
California Tiger Salamander individuals will be adequately relocated from the
development footprint and into permanently suitable aestivation habitat.
3) Exclusionary barriers shall be installed prior to the onset of winter rains
which stimulate the California Tiger Salamander to move to breeding ponds. A
qualified biologist (as determined by the City) shall monitor the installation of
the barriers to ensure that they are properly installed.
4) The barrier fencing shall be maintained and monitored continuously for the
duration of the construction of the development and site to ensure that migrating
and dispersing California Tiger Salamanders do not re-enter the construction
area.
5) The exclusion fencing shall remain in place until the construction of the
development and site is complete.
6) A qualified biologist (as determined by the City) shall be present during
grading and ground disturbance construction activities to ensure that there is no
harm to California Tiger Salamanders.
7) Grading and vegetation clearing shall not occur within 750 feet of the
California Tiger Salamander breeding pond, if a breeding pond is found on the
site in the future, during the breeding and migrating season which occurs from
November to June.
Mitigation Measure 11: A permanent herpetological fence or barrier shall be
installed around the north, east and southern area of the residential footprint following
construction activities to prevent movement of the California Tiger Salamander into
the developed area.
San JoaQuin Kit Fox. The grasslands on the property provide a potentially suitable habitat for the
San Joaquin Kit Fox (Federally Endangered and a California Threatened Species) due to the friable
soils, access to migratory corridors, abundance of rodents and nearby source of freshwater. The
Vargas property falls within the known historical range of the San Joaquin Kit Fox. The most
recent observation occurred on August 20, 2002 where one adult was observed 7 miles northeast of
Livermore at a distance of approximately 10.2 miles east of the property. This species was not
observed during the 2006 biological survey conducted by Olberding Environmental and no species
sightings have occurred in the surrounding area. Based on negative survey results for the Kit Fox
within the Eastern Dublin area and the surrounding areas, the Fit Fox appears to be absent from the
Eastern Dublin Area including the project site (please refer to the analysis in the certified Dublin
Ranch West Draft Supplemental Environmental Impact Report with analysis prepared by H.T.
Harvey and Associates. The analysis is incorporated herein by reference and available for public
review in the Planning Division at the Dublin City Hall, 100 Civic Plaza, Dublin CA, during
normal business hours.) Additionally, this species was not observed during the 2006 biological
survey conducted by Olberding Environmental.
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March 2007
The Eastern Dublin EIR requires compliance with Mitigation Measure 3.7/18.0 which states that a
Section 7 consultation may be invoked to reduce impacts to the kit fox if found on the site to a less
than significant level. Mitigation Measure 3.7/8.1, which requires a habitat management plan, and
Mitigation Measure 3.7/19.0 which states that the use of rodenticides and herbicides should be
restricted on the Project site.
Since certification of the Eastern Dublin EIR, the United States Fish and Wildlife Service
(USFWS) has updated its recommendations for survey protocols and protection measures (USFWS
1997 and 1999) for the Kit Fox. The City of Dublin adopted the Eastern Dublin San Joaquin Kit
Fox Protection Pal which contains guidelines for avoiding, minimizing and offsetting impacts to
the kit fox. These guidelines follow the USFWS Standardized Recommendations for Protection of
the San Joaquin Kit Fox.
Although the San Joaquin Kit Fox is not anticipated to be present on the site or use the site as a
migratory route, the following Mitigation Measure is included in order to reduce impacts related to
the San Joaquin Kit Fox to a less than significant level in the event that the Kit Fox is located on
the Project site in the future:
Mitigation Measure 12: The Project shall comply with the Eastern Dublin San
Joaquin Kit Fox Protection Plan.
Southwestern Pond Turtle. The Biological Resource Analysis indicates that although the Project
site is a suitable habitat for the southwestern pond turtle (a California Species of Concern), these
species were not found on the site during their survey. All construction of the Project is required to
maintain a 100 foot setback from the creek as required by the Eastern Dublin Comprehensive
Stream Restoration Program and the City will not permit encroachment into this area for
construction or the storage of any equipment or materials. Because this creek area has been
determined to be a suitable habitat for this species, it is possible that the species may be found on
the site in the future because construction and grading activities are not anticipated to begin on the
site for several years. To reduce potentially significant impacts related to the Southwestern Pond
Turtle, in the event that the species is found on the site in the future, the following mitigation
measure has been included to reduce potential impacts to a less-than-significant level:
Mitigation Measure 13: Prior to the issuance of any grading or Building Permit, a
survey shall be conducted to determine if the Southwestern Pond Turtle is located
within the Tassajara Creek corridor adjacent to the Vargas property and to locate their
positions if any are found. If any Southwestern Pond Turtles are found on the site, the
turtles shall be moved (under the supervision of a qualified biologist and consistent
with applicable resource agency protocols) or the area shall be blocked off from
construction and foot traffic.
Burrowing Owl. The survey conducted in conjunction with the Analysis surveyed the Project site
to determine if the Burrowing Owl (California Species of Concern) was present on the site.
Burrowing Owls are typically found in open annual grassland habitats typical with some of the
open areas on the Project site. Although the Burrowing Owl was not found on this site (including
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City of Dublin 52
March 2007
no presence of burrows or nest spots) the Burrowing Owl could locate on this spot ifthe property is
left vacant for a period of time. The developer of the Project will be required to conduct a pre-
construction survey 60 days prior to construction to determine if there are any Burrowing Owls on
the site in accordance with Mitigation Measure 3.7/20.0 in the Eastern Dublin EIR. Mitigation
Measure 3.7/27.0 in the Eastern Dublin EIR requires a minimum buffer nesting sites identified in
the survey. Additionally, in order to reduce the potential impacts of this project related to this
species, the following mitigation measures shall be implemented to reduce this potential impact to
a less-than-significant level:
Mitigation Measure 14: A pre-construction survey shall be conducted by a qualified
biologist (as determined by the City) for burrowing owls prior to any ground
disturbance between September 1 and January 31. If ground disturbance is delayed or
suspended for more than 30 days after the survey, the site shall be re-surveyed. If no
over-wintering birds are present, burrows shall be removed prior to the nesting
season. If over-wintering birds are present, no disturbance shall occur within 150 feet
of occupied burrows. If burrowing owls must be moved from the disturbance area
during this period, passive relocation measures shall be prepared and implemented
according to current California Department of Fish and Game burrowing owl
guidelines, approved by the Department and completed prior to construction.
Mitigation Measure 15: If construction is scheduled during the nesting season of
February 1 through September 1, a pre-construction survey shall be conducted within
30 days prior to construction or ground disturbance. A minimum 250 foot buffer shall
be maintained during the breeding season around active burrowing owl nesting sites
identified in pre-construction surveys to avoid direct loss of individuals.
Mitigation Measure 16: If destruction of occupied burrows during either the
breeding or non-breeding season, or any burrows that were found to be occupied
during the pre-construction surveys is unavoidable, a strategy shall be developed to
replace such burrows by enhancing existing burrows or creating artificial burrows at a
2: 1 ratio on permanently protected lands adjacent to occupied burrowing owl habitat
and shall include permanent protection of a minimum of 6.5 acres of burrowing owl
habitat per pair or unpaired resident owl. A plan shall be prepared by a qualified
biologist (as determined by the City) and the developer and shall be approved by the
California Department of Fish and Game which describes the creation or
enhancement of burrows, maintenance of burrows and management of foraging
habitat, monitoring procedures and significant criteria, funding assurance, annual
reporting requirements to the California Department of Fish and Game, contingency
and remediation measures.
Special Status Plants. Olberding Environmental surveyed the property to determine if any special
status plant species were located on the Project site. Several special status plant species were
identified as having the potential to occur on the site identified by the California Natural Diversity
Database. The property was surveyed to determine if Heartscale (California Native Plant Society
(CNPS) List lB), Brittlescale (CNPS List lB), San Joaquin Spearscale (CNPS List lB), Congdon's
Tarplant (NPS List lB), Palmate-Bracted Bird's-Beak (Federal Endangered, California
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Endangered, NPS List IB), Diablo Helianthella (CNPS List IB), Hairless Popcorn Flower (CNPS
List lA), Saline Clover (CNPS List lB) and the Caper-Fruited Tropidocarpum (CNPS List lB)
plant species were located on the site. The survey of the special status plant species, conducted in
June and August, determined that special status plant species were not located on the property at
this time. These species are known to grow only from specific habitat types. The specific habitat
types or "micro-climates" necessary for most of the plant species to occur on this property are not
found within the boundaries of the Vargas property. Although the plant surveys determined that
there are no special status plant species on the site, these species have the potential to occur in the
future as discussed at the beginning of this section. To reduce potentially significant impacts
related to special status plant species, the following mitigation measure has been included to
require a new survey to be conducted prior to construction which will reduce future impacts to
special status plant species to a less-than-significant level:
Mitigation Measure 17: Prior to issuance of any grading or Building Permits
including sitework permits, a plant survey shall be conducted on the site to determine
if any special status plant species are located on the site. A copy of the report shall be
submitted to the Community Development Department for review prior to the
issuance of the Building Permit. Any rare plants shall be staked and the California
Department of Fish and Game shall be immediately notified of their presence. If
special status plants are found on the site and will be disturbed due to grading or
construction, the Project developer shall protect or relocate the plant(s) as required by
the respective resource agency. Copies of the surveys and measures to protect or
relocate plants as required by the resource agency, shall be submitted to the City prior
to the issuance of a grading or Building permit, whichever is issued first.
b,c) Would the Project have a substantial adverse impact on riparian habitat or federally protected
wetlands? LS/M Approximately .483 acres of United States Army Corps of Engineers (USACE)
jurisdictional habitats (including .086 acres of jurisdictional waters and .397 acres of jurisdictional
wetlands) occur on the site near the existing swimming pool and next to the horse barn (see Exhibit
12), based on the delineation submitted to the USACE. These areas will be required to be filled in
to accommodate the Project which is a significant impact. The biologist for the Project (Olberding
Environmental, Inc.) has applied for formal delineation of these jurisdictional habitats from the
USACE.
The following Mitigation Measure has been include to reduce impacts related to the loss III
jurisdictional areas, resulting from the proposed Project, to a less than significant level:
Mitigation Measure 18: Prior to issuance of a Building Permit or grading permit, the
developer shall apply for and receive all required permits for formal delineation from
the United States Army Corps of Engineers for the jurisdictional waters and
jurisdiction wetlands on the Project site.
Mitigation Measure 19: Prior to issuance of a Building Permit or a grading permit,
the Project developers shall retain a qualified biologist (as determined by the City) to
develop a plan to mitigate impacts to .397 acres of wetlands at a 2:1 ratio and impacts
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City of Dublin 54
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to .086 acres of Waters of the United States, not including wetlands, at a 1:1 ratio
(total mitigation for USACE jurisdictional waters will total .88 acres) through
creation of new wetlands, or as otherwise approved by the Corps of Engineers.
The Tassajara Creek is located adjacent to the site on the western side of the property. Construction
of the roads and residential development will not occur within 100 feet from the top of the creek
bank. Due to the location of the creek (adjacent to the west side of the property) the developer will
be required to follow Mitigation Measures 3.7/6.0, 3.7/ 8.0, 3.7/13.0 and 3.7/14.0 and Mitigation
Measure 25 (which requires a Stormwater Pollution Prevention Plan to be submitted for review
and implemented during construction to limit erosion) to ensure that the creek will be protected
during and after grading and construction to reduce erosion impacts to the creek related to the
development of this site as a residential development.
Although the residential dweIling units and roadways will be constructed outside of the creek
setback, the new creekside trail and water quality pond will be located within the 100 foot creek
setback. The encroachment for these types of features is permitted by the Eastern Dublin
Comprehensive Stream Restoration Program, incorporated herein by reference and available for
review in the Planning Division in City Hall located at 100 Civic Plaza in Dublin during normal
business hours. In order to ensure the protection of the riparian resources and the creek during the
construction of these improvements, the following Mitigation Measures have been included to
reduce impacts to the creek and riparian resources to a less than significant level.
Mitigation Measure 20: Construction and grading activities related to the trail
system and water quality pond, located within the 100 foot creek setback, shall not
occur during the wet season which occurs from October 1 through Apri115.
Mitigation Measure 21: Prior to issuance of a Building Permit or grading permit, a
protection plan shall be prepared which details how the creek and riparian resources
will be protected during construction of the trail and water quality pond. At a
minimum, the plan shall include construction fencing, project schedule and measures
for erosion control.
d) Would the Project interfere with movement of native fish or wildlife species? LS/M. No native fish
are located on the site because the Tassajara Creek is located outside of the property and no
structures or construction activities are proposed in the creek. No significant wildlife movement
was observed on or across the site and therefore it is not anticipated that the development will
interfere with such actions. Construction of the Project is not anticipated to begin for a minimum
of two years and there is a potential for special status animal species to be found on the site in the
future due to the plant habitat on the site and future construction activities in the area.
Incorporation of all of the Mitigation Measures discussed under section A, Mitigation Measures 7-
17, will reduce potentially significant impacts related to the movement of wildlife on the Project
site to a less than significant level if special status species were found on the property in the future.
e,f) Would the Project conflict with local policies or ordinances protecting biological resources or
any adopted Habitat Conservation Plans or Natural Community Conservation Plans? NI.
Although severallarge trees are present on the site, there are no trees on the site which meet the
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City of Dublin 55
March 2007
requirements for protection under the City's Heritage Tree Ordinance according to the Tree
Report and Inventory prepared by Hort Science in August of 2006, incorporated herein by
reference and available for review in the Planning Division in City Hall located at 100 Civic
Plaza in Dublin during normal business hours. The project plans include a Landscape Plan
which shows that new landscaping will be planted throughout the site. The site is not located
within the boundaries of any Habitat Conservation Plan. There are no other habitat
conservation plans that are applicable to the Project.
V. Cultural Resources
A Cultural Resources Assessment was conducted by Basin Research Associates for the Project site and is
incorporated herein and is available for review during normal business hours in City Hall in the Planning
Division located at 100 Civic Plaza in Dublin. The Vargas residential area is located at the apex of a small
hill/knoll and consists of a single story rectangular ranch house with attached garage, shed and swimming
pool, and a combination garage with a lean-to. The ranch house is constructed of wooden vertical boards.
The level land located at the base of the hill is currently used to stable horses. Two accessory structures are
located along the western property line. The structures located on the property are not historical and are of
no architectural importance (as noted in the Cultural Analysis).
Eastern Dublin was previously surveyed in conjunction with the Eastern Dublin EIR. The survey identified
several potentially significant archeological resources in Eastern Dublin, but did not indicate the presence of
any resources on this property. Mitigation Measure 3.9/6.0 required project-level archeological surveys to be
conducted as part of the application process in Eastern Dublin. A detailed cultural resources assessment was
conducted on the Project site by Basin Research Associates in 2006. Neither the 1988 survey nor the 2006
site specific survey noted the presence of any cultural resources on the site.
The Eastern Dublin EIR identified impacts 3.9/B, Disruption or Destruction of Unidentified Pre-Historic
Resources and 3.9/D, Disruption or Destruction of Unidentified Historic Resources which relate to
construction and grading activities that will occur on this site in the future. All Mitigation Measures adopted
for these impacts and included in the Eastern Dublin EIR continue to apply to this Project.
Project Impacts
a) Would the Project cause substantial adverse changes to significant historic resources? Nl. The
2006 Cultural Resources Assessment did not identifY any historic resources on the site. Therefore,
the possibility of encountering historic resources is considered remote and no impact is expected.
b-d) Would the Project cause a substantial adverse change in the significance of an archeological
resource or destroy a paleontological resource or unique geological feature or disturb human
remains? LS/M. No cultural resources remain on the graded surface of the site. Any cultural
resources which are currently buried beneath the ground surface would be re-buried by the
proposed Project. The possibility does exist, however, that cultural resources could be buried
on the site and could be discovered during excavation or grading of the site. In the event that
such resources are encountered Mitigation Measures 3.9/5.0 - 6.0 in the Eastern Dublin EIR
which require cessation of construction activities if historic or prehistoric remains are found
and the development of an action plan in the event that remains are found and the following
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mitigation measure have been included to reduce potential impacts to a less-than-significant
level.
Mitigation Measure 22: Despite negative results for archeological resources
within the project area, the possibility that undetected prehistoric archeological
resources might exist on the property must be recognized and a contingency plan
shall be developed in accordance with CEQA Guidelines Section 15064.5 to
handle discoveries during project construction. In the event that any prehistoric
material is discovered, work shall be halted in the immediate vicinity of the site
until a qualified archeologist inspects the discovery, and, ifnecessary implement a
plan for further evaluative testing and/or retrieval of endangered materials.
VI. Geology and Soils
A Preliminary Geologic and Geotechnical Report was prepared for the property in 2006 by ENGEO Inc
(incorporated herein as Appendix C). The report determined that construction of the residential development
was feasible on the site from a geotechnical standpoint.
Stream Corridor
The Eastern Dublin Comprehensive Stream Restoration Program adopted in June of 1996 requires a
minimum 100 foot setback from the top of the bank of the Tassajara Creek to roads and structures in order
to ensure both structural safety to buildings and related improvements adjacent to creeks and to provide a
buffer of sensitive habitat within the creeks. The required setback is noted on the attached Stage 1
Development Plan in Exhibit 8.
Seismic
The Project area is part of the San Francisco Bay Area, a seismically active region. The significant
earthquakes that occur in the Bay Area are generally associated with crustal movement along well-defined,
active fault zones ofthe San Andreas Fault system, which regionally trend in a northwesterly direction. The
San Andreas Fault, which generated the great San Francisco earthquake of 1906, passes southwest of the
site. Two other major active faults in the area are the Hayward Fault and the Calaveras Fault. The Project
area, however, is not located within an Earthquake Fault Zone for active faults and no faults are mapped on
the site.
Site Soils
Fill material is located at the top of the creek bank and at the entrance to the site and consist of clayey sand
and silty clay. Native soil on the site consists of silty clay and sandy clay interbedded with very dense silty
sand cover bedrock. The clayey deposit has a generally stiff to very stiff consistency. Bedrock on the site
consist of weathered claystone, siltstone and sandstone.
Landform and Topography
The site has a sloping topography. Existing elevations on the site range from approximately 466 feet above
sea level near the top of the creek bank to 490 feet above sea level at Tassajara Road. The Vargas property
sits below the existing Tassajara Road and slopes up from the bank of the Tassajara Creek.
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The Eastern Dublin EIR identified impacts 3.6/B, Earthquake Ground Shaking: Primary Effects, 3.6/D,
Substantial Alteration to project Site Landforms, 3.6/1, Natural Slope Stability, 3.6/J Cut-and-Fill Slope
Stability and 3.6/K Erosion and Sedimentation: Construction-Related which relate to the development of
this project. All Mitigation Measures adopted for these impacts and included in the Eastern Dublin EIR
continue to apply to this Project.
Project Impacts
a) Would the Project expose people or structures to potential substantial adverse impacts, including
loss, injury or death related to ground rupture, seismic ground shaking, ground failure or
landslides involving:
i) Rupture of a known earthquake fault, as delineated on the most recent Aquist-Priolo
Earthquake Fault Zoning Map issued by the State Geologist for the area or based on other
substantial evidence of a known Fault (Refer to the Division of Mines and Geology Special
Publication 42)? LS. The Project site is subject to ground shaking caused by a number of
regional faults. Under moderate to severe seismic events which are probable in the Bay Area,
buildings, utilities and other improvements would be subject to damage caused by ground
shaking.
The Project site is not located within the Alquist-Priolo Earthquake Safety Zone and therefore
the potential for ground rupture is anticipated to be minimal. The project will be required to
comply with Mitigation Measures 3.6/1.0 through 3.6/8.0 and 3.6/12.0 in the Eastern Dublin
EIR which require that the development be designed to minimize alteration of the existing
land and reduce groundwater impacts due to irrigation. During the Building Permit review of
the project, the City will review the construction plans to ensure that the residential units will
conform to all Uniform Building Code requirements which aim to reduce impacts associated
with earthquakes in the area. With compliance with the Uniform Building Code, the Project
will not be exposed to rupture of an earthquake fault to any degree greater than what was
identified in the Eastern Dublin EIR. As a result, the effects on a seismic event on the Project
will be less than significant.
ii) Strong Seismic Shaking? LS. As discussed above, there are no active faults either on or
within close proximity ofthe site. However, the site is subject to severe ground shaking from
active and potentially active faults in the greater Bay Area, including the Hayward, San
Andreas, Greenville and Calaveras Faults. The potential primary effects for earthquake
ground shaking is common to the San Francisco Bay region and was identified as a
significant and unavoidable impact in the Eastern Dublin EIR and a Statement of Overriding
Considerations was adopted for Impact 3.6/B, Earthquake Ground Shaking, Primary Effects.
The development can expect to experience at least one moderate to severe earthquake during
the life span of the development. Ground shaking is a hazard that cannot be eliminated,
however, it can be partially mitigated through proper attention to seismic structural design
and observance of good construction practices. Construction of the Project will be required to
conform to the California Building Code (CBC) at the time of Building Permit issuance in
accordance with Mitigation Measure 3.6/1.0 of the Eastern Dublin EIR.
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Secondary effects of earthquake ground shaking include possible seismically induced
landslides, differential compaction and/or settlement. Secondary effects were identified in the
Eastern Dublin EIR as a potentially significant impact (Impact 3.6/C). The measures listed in
the Eastern Dublin EIR to reduce ground shaking impacts will mitigate secondary impacts to
a less than significant level.
The proposed Project is consistent with the intended use of the property, as a residential
development, as noted in the Eastern Dublin Specific Plan and Dublin General Plan and
would not have any new or greater impacts, with respect to ground shaking, than identified in
the Eastern Dublin EIR.
The Project will be required to comply with Mitigation Measures 3.6/3.0 (removal of
unstable materials), 3.6/4.0 (Applicant is required to improve the stability of fills), 3.6/5.0
(requires that fill settlement be reduced), 3.6/6.0 (project must be designed to accommodate
settlement without failure) and 3.6/7.0 (a design level geotechnical report must be submitted
in conjunction with a Building Permit).
iii) Seismic related ground failure, including liquefaction? LS. The Preliminary Geologic and
Geotechnical Report (Appendix C) indicates that the site is comprised of silty clay and sandy
clay interbedded with very dense silty sand over bedrock. The Report notes that the very fine-
grained silty sand layers found on the site are not considered to be liquefiable due to the
dense consistency. Based on the geotechnical report that was prepared for the site, there is no
impact to the Project due to liquefaction.
iv) Landslides? LS. As noted in the Geologic and Geotechnical Report, according to regional
landslides maps, no landslides were mapped on the site or observed on the site by ENGEO,
Inc. The Report does indicate that some of the fill located near the existing entrance to the
site and at the top of the creek bank could result in impacts in the future. Adherence to
Mitigation Measures 3.6/3.0-7.0 and 3.6/20.0 - 26.0 in the Eastern Dublin EIR which require
stability of the fill material and grading plans which conform to the Uniform Building Code
will reduce these impacts to a less-than-significant level.
b) Result in erosion and/or the loss of topsoil? LS. The construction of all of the land uses contained
in the Eastern Dublin Specific Plan will have the potential to increase erosion in the area. The
Project will be required to comply with Mitigation Measures 3.6/27.0 and 3.6/28.0 which requires
the Project to prepare and implement erosion plans which ensures that this impact remains less-
than-significant.
Soil erosion and the loss of topsoil could occur during project grading and construction activities
especially during the winter months when rainfall typically occurs, if the soils are not properly
protected. The exposure of the dirt to rainfall and wind could result in soil erosion.
The preliminary site plan (Exhibit 8) indicates that a water quality pond (detention pond) will be
constructed onthe west side of the property within the creek setback close to the development's
internal road. Some of the surface water from the development will be directed into this pond. The
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pond would allow sediment and debris from low-flow surface water to remain in the pond and not
be discharged into the adjacent Tassajara Creek (located adjacent to, but outside of the property).
The detention pond will remove most of the sedimentation and debris from the development. For
the remainder of the surface water, the water will drain into a storm drain where it will attach to the
storm drain system on Tassajara Road.
Adherence to Mitigation Measures 3.6/27.0 and 28.0 in the Eastern Dublin EIR which require that
grading activities be timed to avoid the rainy season as much as possible, that interim control
measures be implemented to control runoff and that the Project reduce erosion potential, require
appropriate design, construction and continued maintenance of surface and subsurface drainage to
ensure that erosion and/or loss of topsoil impacts remain less than significant.
c-d) Is the site located on soil that is unstable or expansive or may potentially result in landslides or
collapse? LS/M. As discussed in the Geotechnical Report, some unengineered fill was placed on
the site which ranges from 2 to 5 feet thick and is located at the entrance to the site and near the top
of the creek bank. The Report recommends that this fill be removed and recompacted. The
following Mitigation Measure is included to reduce impacts related to unstable soil to a less than
significant level:
Mitigation Measure 23: Site Preparation and grading recommendations to remove
unstable fill materials included on page 3 in the Preliminary Geologic and
Geotechnical Report prepared by ENGEO, Inc. for the Project site shall be
incorporated into the grading plan.
e) Does the Project site have soils incapable of supporting on-site septic tanks or alternative waste
disposal systems? NI. The Project will be connected to a sanitary sewer system provided by the
Dublin San Ramon Services District and therefore septic tanks or alternative waste disposal
systems will not be used.
VII. Hazards and Hazardous Materials
The project site is currently developed with one residential dwelling unit with a few accessory structures and
has been used for residential purposes since the 1960's. Pursuant to Government Code Section 65962.5, the
site is not located on a hazardous waste and substance site. The Eastern Dublin Environmental Impact
Report did not address any impacts related to Hazards and Hazardous Materials.
Project Impacts
a, b, c) Would the Project create a significant hazard to the public through the transport, use, disposal
or emission of hazardous materials? LS. The proposed use ofthe site is residential with some open
space, landscape areas and a driveway. Only minor quantities of potentially hazardous materials
including lawn chemicals, household solvents, pesticides and similar items would be associated
with the development that would pose a less than significant impact.
d) Would the Project be located on a site which is included on a list of hazardous materials sites? NI.
Pursuant to Government Code Section 65962.5, the site is not located on a hazardous waste and
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substance site. Additionally, the site has primarily been used as a residence since the 1960's and
typically this use does not have hazardous waste associated with it.
e, f) If the site is located within an airport land use plan or within the vicinity of a private airstrip,
would the Project result in a safety hazard for people working or residing in the area? NI. The
project is not located within an airport land use plan or within the vicinity of a private air strip.
The Project area is located approximately four miles northwest of the Livermore Municipal
Airport.
g) Would the proposed Project impair the implementation of the adopted emergency response plan or
emergency evacuation plan? LS. Adequate emergency access will be provided in the area through
the existing streets. City Staff including the Alameda County Fire Department and the Dublin
Police Services Department have reviewed the site plan included with the Stage I Development
Plan. Both the Police Services Department and the Alameda County Fire Department have
determined that adequate access is provided to the site via the two access points and the break in
the median along Tassajara Road to allow to entry points into the site from northbound Tassajara
Road.
h) Would the proposed project expose people or structures to a significant risk of loss, injury or death
involving wildland fires? LS/M. The Project site is located near undeveloped areas and although
the Project site is not located within a Fire Buffer Zone, there is a potential for wildland fires.
Additionally, the project site is located approximately 2 miles from the nearest fire station. The
City's adopted Wildfire Management Plan aims to reduce wildfire impacts on residential
dwellings. The Plan requires developers to design the dwelling units in order to provide features
such as Class A roof materials, fire sprinkler, approved landscape materials and building materials.
In order to ensure that the proposed development will be adequately designed with respect to safety
the following mitigation measure has been included to reduce these impacts to a less-than-
significant level and the Project will be reviewed for compliance with this Mitigation Measure
when detailed construction plans are submitted:
Mitigation Measure 24: The development shall be designed in such a manner as to
comply with relevant provisions of the City of Dublin's Wildfire Management Plan.
The development shall also include automatic sprinklers on all of the homes. The
design of the Project shall comply with all Alameda County Fire Department rules
and regulations, City of Dublin standards and the California Fire Code.
Vill. Hydrology and Water Quality.
The project site has a gently sloping topography and the Tassajara Creek is located adjacent to the Project
site on the west side of the property. The Federal Emergency Management Agency (FEMA) has determined
that this property is located outside of a special flood hazard area (Map date November 2002).
The Dublin San Ramon Services District (DSRSD) operates the water distribution system that supplies
water to the City of Dublin. The Alameda County Flood Control and Conservation District (Zone 7) owns
the water supply.
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The Project site currently drains to the Tassajara Creek by overland flow or via a road-side swale along
Tassajara Road. A HydrologylDrainage Report was prepared in September of2006 by Ruggeri, Jensen, Azar
and Associates which reviewed the proposed residential development on the Project site. This report is
incorporated herein and is attached to this Mitigated Negative Declaration as Appendix D.
As development continues to occur in the Eastern Dublin Specific Plan area, more impervious surfaces
would be created by paved street, houses, sidewalks, driveways and patios. The additional impervious
surfaces (over what currently exists on the site) will increase water runoffto the creek and drainage channels
in the area.
Water quality in California is regulated by the United States Environmental Protection Agency's (EP A)
National Pollution Discharge Elimination System (NPDES) which controls the discharge of pollutants to
water bodies from point and non-point sources. In the San Francisco Bay Area, this program is administered
by the San Francisco Bay Area Regional Water Quality Control Board (RWQCB). Federal regulations were
issued in November 1990, and were recently updated to expand the authority of the R WQCB to include
permitting of storm water discharges from municipal storm sewer systems, industrial processes and
construction sites which will disturb an area which is larger than one acre. The City of Dublin is a co-
permittee of the Alameda County Clean Water Program (ACCWP) which is a coordinated effort by local
governments in Alameda County to improve the water quality of the San Francisco Bay.
A potential impact to storm water quality is from non-point sources of water pollution. Nonpoint source
(NPS) pollution, unlike pollution from industrial and sewage treatment plants, comes from many diffuse
sources. NPS pollution is caused by rainfall moving over and through the ground. As the runoff moves,
it picks up and carries away natural and human-made pollutants, finally depositing them into lakes,
creeks, wetlands, coastal waters, and underground sources of drinking water. These pollutants include,
but are not limited to fertilizers, herbicides, insecticides, oil, sediment from construction sites, eroding
creek banks and pet waste.
The Eastern Dublin EIR identified impacts 3.5/P, Overdraft of Local Groundwater Resources 3.5fY,
Potential Flooding, 3.5/Z, Reduced Groundwater Recharge and 3.6-J, Cut and Fill Slope Stability which
relate to the development of this site as a residential development which increases the amount of impervious
surfaces on the site. All Mitigation Measures in the Eastern Dublin EIR for these impacts continue to apply
to this Project.
Project Impacts
a) Would the Project violate any water quality standards or waste discharge requirements? LS/M.
Construction of the Project would require grading in order to construct the building pads,
roadways, utilities and other improvements. The Stage 1 Development Plan indicates that due to
the topography on the site, grading and filling activities will occur on the site. The proposed
grading and fill activities are anticipated to increase the possibility of soil erosion into the creek
located adjacent to the Project site, during these activities, which could be a potentially significant
impact. The following Mitigation Measure will ensure that potential water quality impacts as a
result of the Project are reduced to a less-than-significant level:
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Mitigation Measure 25: The developer of the Vargas property shall prepare a
Stormwater Pollution Prevention Plan (SWPPP) which lists Best Management
Practices to reduce construction and post-construction activities to a less-than-
significant level. Measures may include, but shall not be limited to revegetation of
graded areas, silt fencing and the use ofbiofiIters within landscape areas. The SWPPP
shall conform to standards adopted by the Regional Waster Quality Control Board and
the City of Dublin. The SWPPP shall be approved by both agencies and shall obtain a
Notice of Intent from the State Water Resources Control Board prior to the issuance
of grading permits.
b) Would the Project substantially deplete groundwater recharge areas or lowering of water tables?
LS. The Eastern Dublin EIR discussed Impacts 3.5P, Overdraft of Local Groundwater Resources
and 3.5/Z, Reduced Groundwater Recharge, and conformance with Mitigation Measures 3.5/25.0,
3.5/49.0 and 3.5/50.0 in the Eastern Dublin EIR encourage connection to a public water system,
such as DSRSD, to plan facilities and manage programs to protect water quality and to support
groundwater recharge programs. These measures will reduce impacts to groundwater recharge and
water tables to a less-than-significant level. Mitigation Measure 3.5/6.0 requires developers to
install water conserving features such as low flow toilets and shower heads in the development and
compliance with this mitigation measure will be reviewed when detailed construction plans are
submitted for this development during the Building Permit phase of the Project.
c) Would the Project substantially alter drainage patterns or result in flooding on or off the project
site which would result in substantial erosion or siltation on- or off-site? LS/M. The Eastern
Dublin EIR anticipated that implementation of the land uses in the Eastern Dublin Specific plan
with related grading and re-contouring, would change the existing natural drainage patterns.
Grading, fill and recontouring of the Project site will change the natural drainage patter of the site.
The existing site slopes up to Tassajara Road and most of water drains down towards the creek. As
part of the Project, the site will be graded so that it is relatively flat. Stormwater runoff from the
development would eventually flow to the appropriate Zone 7 facility via a storm drainage system.
The Project site is located in the Eastern Dublin Specific Plan area and facilities to support storm
water runoff from the Project site were previously planned for. Mitigation Measure 25 above has
been included to require a Stormwater Pollution Prevention Plan (SWPPP) to reduce runoff
impacts to a less-than-significant level.
d) Would the Project substantially alter drainage patterns or result in flooding either on or off the
Project site which would result in flooding on- or off-site? LS. As discussed above, construction of
the proposed Project will alter existing drainage patterns within the area. Drainage on the site will
be required to connect with existing and planned drainage improvements within the Eastern Dublin
planning area. Utility and Grading plans, which show compliance with this, will be required to be
submitted in conjunction with the Stage 2 and Site Development Review for the residential
development and subsequent Building Permit application. The Project will also be required to
conform to Mitigation Measure 3.5/44.0,3.5/46.0 and 3.5/47.0 in the Eastern Dublin EIR which
requires adequate planning of the development and on-site drainage to minimize flooding as a
result of the development. The Stage I Development Plan indicates that a water quality detention
basin will be constructed near the creek bank and drainage will be diverted to this basin or the
existing storm drain on Tassajara Road which will in a less than significant potential for flooding.
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e) Would the Project create storm water runoff that would exceed the capacity of drainage systems or
add substantial amounts of polluted runoff? LS/M. Construction of the Project is anticipated to
lead to an increase in stormwater runoff from the Project site due to the increase in impervious
surfaces on the site. The following Mitigation Measure will reduce this impact to a less-than-
significant level by requiring the developer to pay for the development's fair share of
improvements necessary to support development in Eastern Dublin:
Mitigation Measure 26: In accordance with the City's Municipal Stormwater Permit,
Section C.3, a drainage and hydrology study shall be submitted to the City of Dublin
Public Works Department, including historic drainage flows from the site, estimated
increases in the amount of stormwater runoff and the ability of downstream facilities
to accommodate flow increase shall be submitted prior to the issuance of grading
permits. This report shall also document the project's fair share contribution to fund
any improvements in downstream facilities that are required to support this project
and shall be submitted with the Stage 2 Rezone and Site Development Review plans.
A water quality detention pond will be constructed adjacent to the Tassajara Creek to treat surface
water runoff from a portion of the Project site. Storm drains which will divert some of the runoff to
the existing storm drain system on Tassajara Road will also be constructed. The Eastern Dublin
Specific Plan and Dublin General Plan anticipated a dense residential development on the site and
the Project will not create more impervious surfaces than were anticipated in the Eastern Dublin
EIR. The following Mitigation Measures have been included to reduce impacts related to new
surface drainage and storm drains on the Project site:
Mitigation Measure 27: The siting of the storm drainage infrastructure shall be
consistent with the Resource Management Policies of the Eastern Dublin Specific
Plan.
t) Would the Project substantially degrade water quality? LS/M. The proposed project would not
degrade water quality. As discussed above, mitigation measures included in the Eastern Dublin
EIR and Mitigation Measure 25, which requires a SWPPP, will reduce water quality impacts to a
less than significant level.
g) Would the Project place housing within a 1 OO-year flood hazard area as mapped by a Floor
Insurance Rate Map? NI. No portion of the Project site is located within a flood hazard area as
defined by the Federal Emergency Management Agency.
h) Would the Project place within a lOO-year flood hazard boundary structures that impede or
redirectj/oodflows? NI. No portion of the Project site is located within a flood hazard area as
defined by the Federal Emergency Management Agency.
i) Would the Project expose people or structures to a significant risk of loss, injury or death
involving inundation by seiche, tsunami or mudflow? NI. There are no bodies of water located
nearby that could impact the Project due to either a seiche or tsunami, therefore there is no impact
to this project.
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j) Would the Project result in inundation by seiche, tsunami or mudflows? LS. The site is not located
near a significant body of water which could result in a seiche. The risk of a potential mudflow is
considered low since no historic mudflows or landslides have been identified on the site. There are
no bodies of water located nearby that could impact the Project due to either a seiche or tsunami
IX. Land Use and Planning
The Project site is located within the Eastern Dublin Specific Plan Area, but is located outside ofthe City
Limit line. The proposed Project is located across Tassajara Road from the Moller Ranch/Casamira Valley
project which is currently under review and will include attached and detached dwelling units. Wallis Ranch
is located to the west of this property and a Site Development Review to allow up to 1,094 dwelling units on
the property is currently under review. The properties located to the north and south of the project site are
each currently developed with one residential unit and accessory structures and the Eastern Dublin Specific
Plan land use designation for the property to the north is Medium-Density Residential and the property to the
south is Medium/High-Density Residential and Neighborhood Commercial. The Eastern Dublin EIR did not
identify any impacts related to Land Use and Planning resulting from development of Eastern Dublin.
Project Impacts
a) Would the proposed Project physically divide an established community? NI. The project site is
currently developed with a residential dwelling unit and accessory structures and has been planned
for residential development since the adoption of the Eastern Dublin General Plan Amenendment
and Specific Plan. The proposal includes an amendment to the existing land use designations of
Medium-Density and Medium/High-Density Residential to Medium-Density Residential which
will lower the exiting density on the site and will be more compatible with the surrounding area.
Therefore, the proposed project including a Specific Plan and General Plan Amendment would not
disrupt the established community.
b) Would the Project conflict with any applicable land use plan, policy or regulation? NI. The
proposed Project includes a General Plan and Specific Plan Amendment for the proposed reduction
in density.
c) Would the Project conflict with a habitat or natural community conservation plan? NI. A Habitat
or natural community conservation plan has not been adopted for this area and therefore
development on the project site would not impact an established plan.
X. Mineral Resources
The Project site contains no known mineral resources. There are currently no mining activities on the site
and there is no evidence that mining occurred in the past.
Project Impacts
a, b) Would the project result in the loss of availability of significant mineral resources? NI. No known
sources of mineral resources exist on the site; therefore there is no foreseeable impact.
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XI. Noise
Major sources of noise on and adjacent to the project site include noise generated by vehicles on Tassajara
Road. Figure 3.1 OB in the Eastern Dublin EIR indicates that noise levels on Tassajara Road will reach or
exceed 60 CNEL (Community Noise Equivalent Level). The Eastern Dublin EIR identifies this impact
(Impact 3.IO/A) as a significant impact and includes several mitigation measures aimed at reducing noise
impacts on residential dwellings.
The Eastern Dublin EIR identified Impacts 3.IO/A, Exposure of Proposed Housing to Future Roadway
Noise, 3.1 O/B, Exposure of Existing Residences to Future Roadway Noise, 3.1 OlD, Exposure of Proposed
Residential Development to Noise from Future Military Training Activities at Parks Reserve Forces
Training Area (Camp Parks RFTA) and the County Jail and, 3.IO/E, Exposure of Existing and Proposed
Residences to Construction Noise which relate to the proposed development. All Mitigation Measures in the
Eastern Dublin EIR for the impacts will apply to this Project.
Project Impacts
a, d) Would the Project expose persons or generation of noise levels in excess of standards established
by the General Plan or other applicable standards? LS/M. Construction of the residential
development would result in short term noise impacts during construction of the development. The
developer of the Project will be required to comply with Mitigation Measures 3.10/4.0 and 3.10/5.0
in the Eastern Dublin EIR which requires the developer to prepare a construction noise
management plan to minimize impacts of construction noise.
The developer will also be required to submit an acoustical analysis to show how the interior noise
level of the residential units will be controlled to a CNEL of 45 dB as required by Mitigation
Measure 3.10/1.0 in the Eastern Dublin EIR. The developer will also be required to provide noise
barriers or berms or include other measures to provide noise control for outdoor spaces. This
analysis will be required to be submitted with the detailed construction plans which will provide
specific information on how the interior noise level will be reduced. The Stage 2 and Site
Development Review plans will be required to show how noise will be reduced in outdoor spaces.
With the incorporation of the following Mitigation Measure, noise impacts to the Project site will
be less than significant:
Mitigation Measure 28: The Stage 2 and Site Development Review plans shall show
noise barriers, berms or solid fencing, which are attractively designed, to control noise
in outdoor spaces (including rear and side yards) to comply with applicable noise
standards. A noise study shall be prepared for the development and submitted with the
detailed construction plans prior to issuance of a Building Permit. The noise study
shall evaluate noise impacts of traffic on Tassajara Road on the Project. The
construction plans shall include the measures recommended in the analysis and the
interior noise level shall be brought to 45 dBA or less
b) Would the Project expose persons to excessive groundborne vibration or groundborne noise
levels? NI. No impacts are anticipated for groundborne vibration or noise, since no sources of
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vibration currently exist or will exist within or adjacent to the Project, such as heavy industrial
facilities or railroads.
c, d) Would the Project substantially increase permanent or periodic ambient noise levels? NI. The
proposed Project may result in an increase in noise levels in the area due to an increase in traffic in
the area. The increase in traffic will be lower than what was previously studied in the Eastern
Dublin EIR due to the reduction in the number of dwelling units on the site, however the noise
generated by the auto trips related to the new development are an unavoidable impact. A Statement
of Overriding Considerations (Impact 3.10/B) was adopted for this impact on the Eastern Dublin
EIR and there is no additional impact beyond that analyzed in the Eastern Dublin EIR.
Additional noise will be generated on a temporary basis during grading activities and construction
of the residential units. This noise would be generated by trucks activity, construction equipment
and tools. Mitigation Measure 3.104.0 requires that the developer submit a Construction Noise
Management Plan to minimize noise impacts on residents which will include a construction and
grading schedule, construction hours and other noise limiting measures. This Plan will be required
to be approved prior to issuance of a Building Permit.
e,f) For a Project located within an airport land use plan or within two miles of an airport, would
the project expose people to excessive noise levels? NI. The property is located approximately
four miles from the Livermore airport and is not within an airport land use plan; therefore there
is no impact.
XII. Population and Housing
The adopted Eastern Dublin Specific Plan anticipates that there will be 13,648 dwelling units in Eastern
Dublin at full build out. The City population as of January 1, 2006 was estimated by the State Department of
Finance to be 41,907. The Association of Bay Area Governments (ABAG) Projections 2005 estimates that
the City's population will grow to 50,000 in 2010 and will grow to 78,200 by the year 2030. The Eastern
Dublin EIR did not identifY any impacts related to population and housing resulting from development of
Eastern Dublin.
Project Impacts
a) Would the Project induce substantial population growth in an area, either directly or indirectly?
NI. Annexation and development of the site was planned for in the Eastern Dublin Specific Plan
and Dublin General Plan. The potential for growth inducing impacts of development under the
General Plan was analyzed in Section 5.2 of the Eastern Dublin EIR and in the Response to
Comment 32-55 of the Eastern Dublin Final EIR. The proposed residential development of 33
units would not substantially increase the number of people in the area. The proposed number of
units is lower than the 110 units which are currently permitted for this property based on the
existing land use designations of Medium-Density and Medium/High-Density Residential and the
55 units assumed in the Eastern Dublin EIR. Because the proposed number of dwelling units is
lower than what was planned for in the Eastern Dublin Specific Plan and Dublin General Plan, the
Project will not induce a substantial population growth in this area over what was reviewed in the
Eastern Dublin EIR.
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b, c) Would the Project displace a substantial number of existing housing units or people? LS. The
existing site has one residential dwelling unit which would be removed in conjunction with
development on the site. The removal of this unit would not displace a large number of people.
XIII. Public Services
Fire Protection: The City of Dublin contracts with the Alameda County Fire Department for fire protection
services including fire suppression, fire prevention, education, inspection services and hazardous material
control to the community. The Eastern Dublin EIR identified impacts 3.4/C, Demand for Increased Fire
Services, 3.4/D, Fire Response to Outlying Areas and 3.4/E, Exposure to Wildlands Hazards which relate to
the provision of fire services and safety of residents on the site as a result of the proposed development. All
mitigation measures adopted for these impacts continue to apply to this Project.
Police Protection: The City of Dublin contracts with the Alameda County Sheriff Department to provide 24-
hour security patrols throughout the community in addition to crime prevention, crime suppression and
traffic safety. The Eastern Dublin EIR identified impacts 3.4/A, Demand for Increased Police Services and
3.4/B, Police Services Accessibility, which all relate to the new development and increase in residents on the
site. All mitigation measures adopted for these impacts continue to apply to this Project.
Schools. The Dublin Unified School District (DUSD) provides educational services to residents in the City
of Dublin. The Eastern Dublin EIR identified impacts 3.4/F, Demand for New Classroom Space, 3.4/G,
Demand for Junior High Schools, 3.4/H, Overcrowding of Schools, 3.4/1, Impact on School Financing
District Jurisdiction, and 3.4/J, Financial Burden on School Districts which relate to the development ofthis
site. All mitigation measures adopted for these impacts continue to apply to this Project.
Parks. Public parks are provided throughout the area by the City of Dublin. Parks in the City and area
include neighborhood parks and community parks. The Eastern Dublin EIR identified impacts 3.4/K,
Demand for Park Facilities, 3.4/L, Park Facilities and Fiscal Impact, and 3.4/M, Impact on Regional
Trail System which relate to the development of this site and an increase in demand for park facilities
due to an increase in residents in the area. All mitigation measures adopted for these impacts continue to
apply to this Project.
Other Public Services: Maintenance of public streets, roads and other governmental facilities are the
responsibility of the City of Dublin Public Works Department. Solid waste services are provided by
Amador Valley Industries. The Eastern Dublin EIR identified impacts 3.4/0, Increased Solid Waste
Production, and 3.4/P, Impact on Solid Waste Disposal Facilities which relates to an increase in solid
waste service demand on the site. All mitigation measures adopted for these impacts continue to apply to
this Project.
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Project Impacts
a) Would the Project result in impacts associated with the provision of the following services?
i) Fire protection? LS/M. Construction of the proposed project would increase demand for fire and
emergency services on the site. As part of Site Development Review and Building Permit Review
of this project, specific fire protection requirements will be imposed to ensure compliance with the
California Fire Code.
The Project will be required to comply with Mitigation Measures 3.4/6.0-3.4/11.0 which require
Applicants to fund new fire facilities in the Eastern Dublin planning area, ensure adequate water
supplies and pressure for fire suppression and minimize wildland fire hazards. Adherence to these
measures will reduce these impacts to a less-than-significant level. Additionally, the Project will be
required to comply with Mitigation Measure 17 contained in this Mitigated Negative Declaration
which requires the residential development to be designed in such a manner as to reduce impacts
associated from wildland fires and ensure adequate emergency access on the site.
ii) Police protection? LS. An increase in the demand for police services may occur as a result of the
new development. The Project was preliminarily reviewed with respect to safety and as part ofthe
Site Development and Building Permit review process, specific security requirements will be
continued to be review on the Project when more detailed plans are submitted (including lighting
levels and locations) to ensure compliance with applicable provisions ofthe City of Dublin
Municipal Code and in accordance with Mitigation Measure 3.4/5.0.
iii) Schools? LS. Construction of the new residential development will increase the demand for school
facilities over what currently exists on the site but less than what was assumed in the Eastern
Dublin EIR. Payment of statutory school mitigation fees is deemed full mitigation of school
impacts under SB 50.
iv) Parks? LS. Construction of the development will result in an increase in demand for park facilities
over what currently exists on the site. Prior to the issuance of a Building permit, the developer will
be required to pay a Public Facilities Fee in accordance with Mitigation Measure 3.4/24.0. The
Public Facilities Fee collected by the City from developers allows the City to construct, upgrade
and maintain park facilities to meet the demands of new developments. Additionally, in accordance
with Mitigation Measure 3.4/36.0, the Stage I Development Plan proposes a public trail adjacent to
the stream corridor to provide access to the open space area to minimize impacts of the
development on open space connections (Impact 3.4IN).
v) Other Public Services?
Maintenance of public facilities, including roads? LS. Approval of the project would increase the
long-term maintenance demand for roads. However, funding to meet the additional demands will
be provided by project payment of the City's Public Facilities Fee and Traffic Impact Fee and any
other applicable fee program.
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Solid waste generation? LS. Approval of the Project would increase generation of solid waste
during construction and during the life of the buildings. The Project will be required to provide
adequate access for garbage trucks for pick-up services. Additionally, the City's current waste
provider, Amador Valley Industries, provides garbage, recycling and organics (yard and food
waste) curbside pick-up which aims to reduce the amount of waste sent to area landfills as
discussed in Mitigation Measures 3.4/37.0-3.4/40.0.
XIV. Recreation
Nearby community and recreational facilities include: two future neighborhood parks, the Ted Fairfield Park
(near the Project site) and the proposed neighborhood park on the Moller Ranch/Casamira Valley Project
Site located across Tassajara Road. The Project will also be served by the Emerald Glenn Park, Dublin
Swim Center, the Dublin Sports Park, the Dublin Library and many other parks and recreational areas in the
City. Regional recreation facilities are provided by the East Bay Regional Park District.
Project Impacts
a) Would the project increase the use of existing and neighborhood or regional parks? LS. The
proposed residential development will result in an increase in demand for recreational facilities due
to an increase in the population on the Project site. The developer will be required to pay a Public
Facilities Fee in order to offset impacts ofthe development by ensuring adequate facilities are
provided in the City and maintained to comply with Mitigation Measures 3.4/29.0-3.4/31.0, in the
Eastern Dublin EIR which requires the developer to payor install their fair share of planned park
facilities, among other things.
The Stage 1 Development Plan (Exhibit 8) indicates that a trail system will be constructed on the
interior of the property which will connect to Dublin Boulevard and run parallel to the Tassajara
Creek as required by Mitigation measure 3.4/32.0 in the Eastern Dublin EIR which requires that
adequate trail systems are provided. This trail system will benefit residents in the area as well as
residents in the new development. The trail may also be used to connect to the Casamira Valley
development, located to the east of this property, which has an extensive trail system.
b) Does the Project include recreational facilities or require the construction or expansion of
facilities which may have an adverse impact on the environment? LS. The proposed Project does
not include any recreational facilities and will not require expansion of any facilities due to the low
number of dwelling units.
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XV. Transportation/Traffic
Development on this site was assumed in the traffic study for the Eastern Dublin EIR (Chapter 3.3 of the
EDEIR) and has also been assumed in buildout conditions in subsequent EIRs in the City, such as the
Dublin Ranch West/Wallis Ranch certified EIR (hereafter, Wallis Ranch SEIR). Traffic impacts as a result
of the proposed Project are less than the midpoint development potential of approximately 55 units which
was studied in the Eastern Dublin EIR and subsequent Eastern Dublin EIRs because the development
potential on the Property has been reduced to 33 units (which is significantly lower than the 110 units
allowed with the current land use designations).
The Traffic Study for Moller Ranch/Casamira Valley (Kimley-Horn and Associates, July 2006, hereafter
"Traffic Study"), included the Vargas property. The Traffic Study included a review of the Vargas property
with a total of 86 units based on the maximum General Plan density. The Traffic Study is attached as
Appendix E, is incorporated herein by reference, and is available for review at the Planning Division,
Dublin City Hall, 100 Civic Plaza, Dublin CA, 94568. The Traffic Study was incorporated as part of the
draft Supplemental Environmental Impact Report for the Moller Ranch/Casamira Valley project and
indicated that development on the Vargas property would result in 313 daily in and 313 daily out trips as a
result of the development of86 units on the site. According to the City's Traffic Engineer, the proposed 33
dwelling unit residential project would result in 125 daily in and 125 daily out trips which are 188 trips less,
each, than assumed in the Traffic Study.
Existing Transportation Network
The project site is served by a number ofregional freeways and local arterial and collector roadways
including:
Interstate 580 - An eight lane east-west freeway that connects Dublin with local cities such as Livermore to
the east and Hayward and Oakland to the west. Interchanges near the project site include
Dougherty/Hopyard Road, Hacienda Drive, Tassajara Road/Santa Rita Road and Fallon Road/El Charro
Road.
Interstate 680 - A six-lane north-south freeway through Alameda and Contra Costa Counties that connects
Dublin to local cities such as San Ramon and Danville to the north and Pleasanton and Fremont to the south.
In 2002, the new southbound 1-680 two-lane flyover connecting to eastbound 1-580 was completed and
opened to traffic. A direct one-lane connector ramp also exists connecting northbound 1-680 to eastbound 1-
580.
Dougherty Road - A six lane road between Dublin Boulevard and 1-580 (the road continues as a six lane
road as Hopyard Road in Pleasanton). This road reduces to four lanes from Dublin Boulevard to the
Alameda County/Contra Costa border where it reduces to two lanes.
Dublin Boulevard - This is a major arterial roadway in the City. The road extends fromthe western City
Limits and will connect with Fallon Road (in the east) in the future.
Hacienda Drive - An arterial roadway designed to provide access to 1-580. This road contains six lanes
south ofI-580 and four lanes north of Dublin Boulevard.
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Arnold Drive - This is a north-south two lane road which connects Gleason Drive to Dublin Boulevard. The
road will extend south of Dublin Boulevard in the future to connect with the Dublin Transit Center.
Gleason Drive - This is an east-west two-lane road parallel to and north of Dublin Boulevard. Gleason
Drive runs from Arnold Drive to Fallon Road. Portions of Gleason Drive are four lanes and a portion ofthis
road is two lanes.
Tassajara Road - This road extends from Santa Rita Road at 1-580 to the Town of Dan vi lie (where it
becomes Camino Tassajara). The road is a four lane road which turns into a two lane road in the more rural
areas of the City.
Santa Rita Road - A six lane divided urban arterial roadway from the 1-580 interchange south to Valley
Avenue in Pleasanton. This road primarily serves the east side of Pleasant on, including the Hacienda
Business Park and provides access to downtown Pleasanton.
Fallon Road - A two lane road which extends from 1-580 and connects with Gleason Drive. In the future,
Dublin Boulevard will be extended and will connect with Fallon Road and Fallon Road will connect with
Tassajara Road.
Existing Transit Services
Altamont Commuter Express (ACE) Rail - The Altamont Commuter Express operates three trains per day
between Stockton and San Jose. The trains provide westbound service in the morning and eastbound service
in the evenings. The ACE train has stations in Livermore near the downtown and on Vasco Road. The train
also has one stop in Pleasanton on Pleasanton Avenue near Main Street. The Pleasanton ACE train station is
likely to be used by Dublin commuters and bus services connect to the station which provides a transit link
to Dublin.
Livermore Amador Valley Transit Authority (also known as WHEELS)- The Livermore Amador Valley
Transit Authority provides bus service to the communities of Dublin, Pleasanton and Livermore. Several
lines provide service to Eastern Dublin. The closest stop near the Project site is on Dublin Ranch Road near
Tassajara Road (south of the Vargas property). The WHEELS bus system connects to both the ACE train
and the BART station. It is expected that the existing bus lines will be expanded further as additional homes
are built in the Eastern Dublin area.
Dial-A-Ride (DAR) - Dial-A-Ride is a bus service which will pick a resident up and drop the resident off at
a desired location, by appointment. DAR is available for residents in Dublin, Pleasanton and Livermore who
have a disability or heath related condition and are unable to board the bus or are unable to get to a bus stop.
Bay Area Rapid Transit (BART) - BART operates trains between the Dublin/Pleasanton BART Station near
Hacienda Drive and the Oakland/San Francisco area. Service is available seven days a week. The BART
station is accessible by automobile, the bus system, bicycles, pedestrians and private shuttles. BART
anticipates that construction will begin on a new BART station in Western Dublin in 2007, however it is
anticipated that residents of the Vargas Project will likely use the station near Hacienda Drive.
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Existing Levels of Service.
The existing AM and PM peak hour traffic volume counts were conducted at nine existing study area intersectiol
in April 2005. The study intersections include the following existing and future intersections.
1. Dougherty Road / Dublin Boulevard
2. Hacienda Drive / 1-580 Eastbound Ramps
3. Hacienda Drive / 1-580 Westbound Ramps
4. Hacienda Drive / Dublin Boulevard
5. Santa Rita Road / 1-580 Eastbound Ramps-Pimlico Drive
6. Tassajara Road / 1-580 Westbound Ramps
7. Tassajara Road / Dublin Boulevard
8. Tassajara Road / Fallon Road (Future Intersection)
9. Fallon Road / Dublin Boulevard (Future Intersection)
10. El Charro Road / 1-580 Eastbound Ramps
11. Fallon Road / 1-580 Westbound Ramps
12. Fallon Road / Street "E" (Future Intersection)
13. Tassajara Road / North Project Access (Future Intersection)
14. Tassajara Road / South Project Access (Future Intersection)
Table 3, below, summarizes the results of the signalized and unsignalized intersection level of service analyses :f(
existing conditions. Detailed calculations are contained in Appendix 8.6. Currently, all nine existing study
intersections operate at acceptable service levels during the peak hours.
Table 3: Existing Intersection Levels of Service
Study Intersection AM Peak Hour PM Peak Hour
V/C LOS V/C LOS
Signalized Intersections
Dougherty Road/Dublin 0.60 A 0.77 C
Boulevard
Hacienda Drive/I-580 Eastbound 0.53 A 0.42 A
Ramps
Hacienda Drive/I-580 Westbound 0.33 A 0.33 A
Ramps
Hacienda Drive/Dublin 0.24 A 0.50 A
Boulevard
Santa Rita/I-580 Eastbound Off- 0.37 A 0.45 A
Ramp/Pimlico Drive
Tassajara Road/I-580 Westbound 0.38 A 0.36 A
Ramps
Tassaiara Road/Dublin Boulevard 0.35 A 0.41 A
Tassajara Road/Fallon Road N/A N/A N/A N/A
(Future Intersection)
Fallon Road/Dublin Boulevard N/A N/A N/A N/A
(Future Intersection)
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Study Intersection AM Peak Hour PM Peak Hour
V/C LOS V/C LOS
Fallon Road/Street "E" (Future N/A N/A N/A N/A
Intersection)
Tassajara Road/North Project N/A N/A N/A N/A
Access (Future Intersection)
Tassajara Road/South Project N/A N/A N/A N/A
Access (Future Intersection) U nsignalized Intersections
El Charro Road/I-580 EB Off- 9.1 A 19.7 C
ramp
Fallon Road/I-580 WB Off-ramp 9.6 A 9.2 A
Source: Casamira Valley Traffic Study, Kimley-Hom and Associates, 2006
Standards of Significance. The following standards of significance are used in the Initial Study
traffic analysis.
Intersections. An impact would be significant if an intersection previously mitigated to an
acceptable level would now exceed acceptable levels. In addition, an impact would be significant
if a new intersection is identified as exceeding acceptable levels and if such intersection was not
previously identified in the Eastern Dublin EIR as a study intersection. The Dublin General Plan
requires that the City strive for LOS D at intersections. (General Plan Circulation and Scenic Highways
Guiding Policy F).
Routes of Regional Significance. With respect to routes of regional significance, an impact would be
significant if such routes would fail to comply with the applicable standard of the General Plan The
General Plan requires the City to make a good faith effort to maintain LOS D on arterial segments of,
and at the intersections of, routes of regional significance (Dublin Boulevard, Dougherty Road,
Tassajara Road and San Ramon Road) or implement transportation improvements or other
measures to improve the level of service. If such improvements are not possible or sufficient, and
the Tri- Valley Transportation Council cannot resolve the matter, the City may modify the level of
service standard assuming other jurisdictions are not physically impacted (General Plan Circulation
and Scenic Highways Guiding Policy E).
Road Segments. The maximum Average Daily Traffic (ADT) threshold standards of the General Plan
for two-lane roadways (15,000 vehicles per day), four-lane roadways (30,000vpd), six-lane roadways
(50,000 vpd), and eight-lane roadways (70,000 vpd) are used to determine the through lane
requirements.
Freeway Segments. The LOS for a freeway segment is based on peak hour traffic volumes in
terms of number of passenger cars per hour. Similar to intersection operation, the 2000
Highway Capacity Manual ranks
volume-to-capacity ratios for freeway segment operation ranging from LOS A (freeflow condition)
to LOS F (highly congested condition). LOS E represents "at capacity" operation. The standard for
freeway impacts is based upon the Alameda County Congestion Management Agency (ACCMA)
monitoring standards and is established at LOS E.
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Public Transit. Public transit impacts would be significant if the demand for public transit service
would be increased above that which could be accommodated by local transit operators or agencies.
Traffic Safety. CEQA allows for consideration of increased hazards on roadway facilities as part of the
basis for identifying standards of significance. A significant traffic safety impact would include a
design feature, such as a sharp curve or dangerous intersection, that would not be consistent with City
of Dublin engineering design standards or standards published by other traffic engineering
professional organizations.
Baseline Conditions
Baseline conditions are existing conditions with the addition of traffic from approved and pending projects
in Dublin, Pleasanton and Dougherty Valley as discussed in the Traffic Study.
For Baseline conditions, three of the future intersections (Tassajara Road/Fallon Road, Fallon Road/Dublin
Boulevard, Fallon Road/Street "E") are assumed to be in place and signalized as part of other development
improvements expected in the area. The northeasterly leg of the Tassajara Road/Fallon Road intersection
will be constructed as part of the Fallon Crossings development. The Fallon Road/Dublin Boulevard
improvements are expected to be completed as part of developments within the Dublin Ranch area. The
Fallon Road/Street "E" intersection will be constructed as part of Phase 4 of the Silveria Ranch
development. The interim geometries for the Tassajara Road/Fallon Road, Fallon Road/Dublin Boulevard,
and Fallon Road/Street "E" under the Baseline scenario are shown in the Traffic Study.
Under Baseline conditions, the intersections ofEl Charro Road/I-580 Eastbound Ramps and Fallon Road/I-
580 Westbound Ramps will be widened and signalized as part of the Phase I Fallon Road Interchange
Improvement project.
The following improvements have been planned by the City of Dublin for the Dublin Boulevard/Dougherty
Road intersection:
. Three left-turn lanes, three through lanes, and two right-turn lanes on the northbound Dougherty
Road approach;
. Two left-turn lanes, three through lanes and one shared through/right-turn lanes on the southbound
Dougherty Road approach;
. Two left-turn lanes, three through lanes and two right-turn lanes on the eastbound Dublin Boulevard
approach; and
. Three left-turn lanes, three through lanes and one right-turn lane on the westbound Dublin
Boulevard approach.
These improvements are included in the City's 5-year Capital Improvement Program (CIP) and are
expected to be implemented by the time the Vargas Project is completed. The current CIP project to install
these improvements at Dublin Boulevard and Dougherty Road is funded by project developers who are
required to pay their pro-rata share of the cost to construct these improvements through payment of the
Eastern Dublin Traffic Impact Fee.
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Baseline Trip Generation
Trip generation is defined as the number of "vehicle trips" produced by a particular land use or project. A
trip is defined as a one-direction vehicle movement. The total number of trips generated by each land use
includes both inbound and outbound trips.
The trip rates are obtained from the standard reference Trip Generation, 7th Edition, published by the
Institute of Transportation Engineers (ITE). Trips rates were also obtained from previous traffic study
reports of corresponding projects. Approved and pending projects in Tables Cl and C2, respectively, of the
Traffic Study are expected to generate a total of approximately 110,276 additional daily trips, with 9,792
trips occurring during the AM peak hour, and 10,526 trips occurring during the PM peak hour. These
figures assume development of the Vargas site at 86 units.
Baseline Levels of Service
Table 4, below, summarizes the results of the signalized intersection level of service analyses for Baseline
conditions using the ICU methodology adopted by the CCT A and used by the City of Dublin. Detailed
calculations can be found in the Traffic Study.
All ofthe study intersections are expected to continue to operate at an acceptable service level under Baseline
conditions.
Table 4: Intersection Levels of Service - Baseline Conditions
Study Intersection AM Peak Hour PM Peak Hour
V/C LOS V/C LOS
Dougherty RoadlDublin Boulevard 0.64 B 0.73 C
Hacienda Drive/I-580 Eastbound Ramps 0.67 B 0.61 B
Hacienda Drive/I-580 Westbound Ramps 0.61 B 0.50 A
Hacienda Drive/Dublin Boulevard 0.50 A 0.70 B
Santa Rita/I-580 Eastbound Off- 0.70 B 0.70 B
Ramp/Pimlico Drive
Tassajara Road/I-580 Westbound Ramps 0.62 B 0.73 C
Tassajara RoadlDublin Boulevard 0.71 C 0.74 C
Tassajara Road/Fallon Road 0.62 B 0.47 A
Fallon RoadlDublin Boulevard 0.44 A 0.42 A
El Charro Road/I-580 Eastbound Ramps 0.07 A 0.10 A
Fallon Road/I-580 Westbound Ramps 0.22 A 0.37 A
Fallon Road/Street "E" 0.09 A 0.14 A
Tassajara RoadINorth Project Access n/a n/a n/a n/a
Tassajara Road/South Project Access n/a n/a n/a n/a
Source: Casamira Valley Traffic Study, Kimley-Hom and Associates, 2006
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Project Trip Generation
The Project is anticipated to generate 21AM peak hour trips and 24 PM peak hour trips based on the ITE
Trip Generation, ih Edition for a 33-unit residential subdivision. .
Baseline Plus Project Levels of Service
Under the Baseline Plus Project scenario, all study intersections are expected to operate at acceptable service
levels. Traffic generated by the Project results in very small changes to V/C ratios and no changes in LOS at the
study intersections. No potentially significant supplemental impacts are iden~ified for the Baseline Plus Project
scenario. The proposed Project, as discussed in this Mitigated Negative Declaration, has fewer dwelling units th~
what was previously studied in the Eastern Dublin EIR.
Table 5: Intersection Levels of Service - Baseline Plus Project Conditions
Study Intersection AM Peak Hour PM Peak Hour
V/C LOS I V/C LOS
Dougherty Road/Dublin Boulevard 0.64 B 0.74 C
Hacienda Drive/I-580 Eastbound Ramps 0.67 B 0.61 B
Hacienda Drive/I-580 Westbound Ramps 0.61 B 0.50 A
Hacienda Drive/Dublin Boulevard 0.50 A 0.70 B
Santa Rita/I-580 Eastbound Off- 0.70 B 0.71 C
Ramp/Pimlico Drive
Tassajara Road/I-580 Westbound Ramps 0.62 B 0.75 C
Tassajara Road/Dublin Boulevard 0.71 C 0.76 C
Tassajara Road/Fallon Road 0.67 B 0.50 A
Fallon Road/Dublin Boulevard 0.44 A 0.42 A
El Charro Road/I-580 Eastbound Ramps 0.07 A 0.10 A
Fallon Road/I-580 Westbound Ramps 0.22 A 0.37 A
Fallon Road/Street "E" 0.09 A 0.14 A
Tassajara Road/North Project Access 0.56 A 0.65 B
Tassajara Road/South Project Access 0.59 A 0.68 B
Source: Casamira Valley Traffic Study, KimZey-Horn and Associates, 2006
Buildout (Cumulative) Conditions
Future traffic from buildout projects in Dublin, Pleasanton and Dougherty Valley were added to the
Baseline Plus Project Conditions. Buildout (cumulative) conditions are based on local general plans and
expected to be in place in Year 2025. City staff provided a list of build out projects which are shown in
Table C3 of Appendix C ofthe Traffic Study. All of these land uses are included in the new Dublin Travel
Demand Model (DTDM) for cumulative traffic analysis. The DTDM was used to forecast traffic volumes
under Buildout Conditions (Year 2025).
Roadway improvements included in the Eastern Dublin Traffic Impact Fee (TIF) are planned within the
study area and are assumed in the Buildout conditions analysis. They include the following:
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Dublin Boulevard/Tassajara Road Capacity Improvements- Addition of two westbound left-turn lanes,
one through lane and one right-turn lane; two northbound through lanes; one eastbound through lane;
and one southbound left-turn lane. Some of these improvements have been constructed, but not open to
traffic.
Scarlett Drive Extension- Extension of Scarlett Drive to the north from Dublin Boulevard to Dougherty
Road and associated intersection improvements at Dublin Boulevard/Scarlett Drive and Dougherty
Road/Scarlett Drive.
Dublin BoulevardlHacienda Drive Capacity Improvements- Addition of one westbound right-turn lane
and conversion of a northbound right-turn lane to a third through lane.
Hacienda Drive/I-580 Westbound Off-ramp Capacity Improvements- Widening of the northbound
Hacienda overpass to four lanes to accommodate an exclusive lane leading to the 1-580 westbound loop
on-ramp. Addition of one shared right/left-turn lane on the westbound off-ramp approach.
Hacienda Drive/I-580 Eastbound off-ramp Capacity Improvement-: Addition of one shared right/left-
turn lane on the off-ramp approach.
Dublin Boulevard/Dougherty Road Capacity Improvement: Addition of ultimate improvements as
identified on page 64 ofthe Draft SEIR for the Fallon Village Project. These improvements are
expected to be implemented in 2007.
Under this Buildout scenario, Dublin Boulevard (six lanes) is assumed to be extended to North Canyons
Parkway in Livermore, and Central Parkway (two lanes) is assumed to be extended to Fallon Road. Phase
II Fallon Road interchange improvements are also assumed to be in place for the buildout scenario. These
improvements are included as part of the Eastern Dublin Traffic Impact Fee program.
Under Buildout conditions, each project access intersection with Tassajara Road will have the following
lane configurations:
Northbound approach - Three through lanes, one left-turn lane and one right-turn lane.
Southbound approach - One left-turn lane, one right-turn lane and three through lanes.
Westbound approach- One left-turn lane and one right-turn lane.
Eastbound approach - One left-turn lane and one right-turn lane.
Buildout Levels of Service
As shown on Table 6, below, under the buildout scenario, the intersections of Dougherty RoadlDublin Boulevarc
and Santa Rita Road/I-580 Eastbound Ramps/Pimlico Drive are expected to operate unacceptable at Level of
Service (LOS) E during the PM peak hour. All other intersections in the Project area are expected to operate
acceptably under the Buildout Scenario.
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Table 6. Intersection Levels of Service, Buildout Conditions
AM Peak Hour PM Peak
Study Intersection Hour
V/C LOS V/C LOS
Dougherty Road/Dublin Boulevard 0.77 C 0.93 E
Hacienda Drive/I-580 Eastbound Ramps 0.81 D 0.60 A
Hacienda Drive/I-580 Westbound Ramps 0.79 C 0.65 B
Hacienda Drive/Dublin Boulevard 0.86 D 0.84 D
Santa Rita/I-580 Eastbound Off- 0.81 D 0.95 E
Ramp/Pimlico Drive
-- With third eastbound left-turn lane 0.75 C 0.84 D
Tassajara Road/I-580 Westbound Ramps 0.71 C 0.71 C
Tassajara RoadlDublin Boulevard 0.89 D 0.80 C
Tassajara Road/Fallon Road/Project Access 0.50 A 0.82 D
Fallon Road/Dublin Boulevard 0.76 C 0.89 D
El Charro Road/I-580 Eastbound Ramps 0.59 A 0.49 A
Fallon Road/I-580 Westbound Ramps 0.64 B 0.66 B
Fallon Road/Street "E" 0.42 A 0.40 A
Tassajara Road/North Project Access 0.62 B 0.58 A
Tassajara Road/South Project Access 0.64 B 0.59 A
Source: Casamira Valley Traffic Study, KimZey-Horn and Associates, 2006
Project Impacts
a) Would the Project cause an increase in traffic, which is substantial in relation to existing traffic
load and street capacity? LS/M. The Traffic Study concluded that the proposed Project would not
result in significant impacts to intersections near the Project site with the completion of several
planned improvements in the area (as discussed under the Baseline Conditions section).
Additionally, the impacts associated with this development are less than what has previously been
studied due to a reduction in the number of units on the site to 33 residences. The Project is subject
to payment ofthe City's Traffic Impact Fee which funds improvements aimed at easing traffic
congestion and funding specific improvements identified in the Eastern Dublin EIR (Mitigation
Measures 3.3/2.1-3.3/4.0 and 3.3/6.0-3.3/14.0).
As described in the Traffic Study, a roadway segment analysis was conducted to determine the
number of through lanes that would be needed to have various roadway segments operate at
acceptable levels of service for all study scenarios.
Initial Study/Mitigated Negative Declaration for the Vargas Project
City of Dublin 79
March 2007
Roadway Segment Analysis
In general, ADT volumes for existing and future scenarios were estimated by assuming that the
PM peak hour volumes were equivalent to 10 percent of daily volumes. The daily trips from the
proposed Project are based on the appropriate ITE daily trip rate. Table 7, below, shows the
average daily traffic on Tassajara Road under Existing, Baseline, Baseline plus Project, and
Buildout Conditions, where the majority of the Project trips are expected to travel.
Table 7: Roadway Segment ADT
Study Scenario ADT
Roadway Segment Baseline Plus
Existing Baseline Proiect Buildout
Northbound Tassajara Road between Interstate-580 11,920 22,175 22,260 30,300
and Dublin Boulevard
Tassajara Road between Dublin Boulevard and 18,260 34,735 34,880 48,800
Gleason Drive
Tassajara Road between Gleason Drive and North 14,540 32,010 32,230 40,450
Dublin Ranch Drive
Tassajara Road between North Dublin Ranch Drive 6,850 19,880 20,100 32,650
and Northern Access for Dublin Ranch West
Tassajara Road between Northern Access for Dublin 6,850 14,390 14,610 27,060
Ranch West and Fallon Road
Tassajara Road between Fallon Road and County 6,850 13,500 13,760 26,430
Limit
Source: Casamira Valley Traffic Study, Kimley-Horn and Associates, 2006, and Dublin Traffic Engineer, 2007
The first three segments of Tassajara Road, as shown in Table 7, have already been improved to
four lanes. Fallon Crossings and Wallis Ranch are required to widen Tassajara Road along the
fourth and fifth segments, which currently consist of two lanes of traffic.
The proposed Project would contribute additional traffic to Tassajara Road. This includes the
segment of Tassajara Road between Fallon Road and the County Limit, the segment ofTassajara
Road between Northern Access for Dublin Ranch West and Fallon Road and the segment of
Tassajara Road between North Dublin Ranch Drive and Northern Access for Dublin Ranch West.
If the widening ofthese roadway segments to four lanes does not occur, Tassajara Road will lack
adequate roadway capacity for the Project. This is a potentially significant impact. This impact
would be reduced to a less-than-significant level through adherence to the following Mitigation
Measure:
Mitigation Measure 29: The Project developer shall widen Tassajara Road between North
Dublin Ranch Drive and the City/County line to four lanes, in the event that this Project is
developed prior to the Fallon Crossings or Casamira Valley projects, and shall dedicate
additional property as determined by the Dublin City Engineer,
Initial Study/Mitigated Negative Declaration for the Vargas Project
City of Dublin 80
March 2007
b) Would the Project exceed, either individually or cumulatively, a LOS standard established by the
County CMAfor designated roads? LS/M. The following sections provide a discussion on the
cumulative impacts related to the construction of the proposed Project on designated roads:
Dublin Boulevard/Dougherty Road
Under buildout conditions of Eastern Dublin, the intersection of Dougherty Road/Dublin
Boulevard is expected to operate unacceptably during the PM peak hour.
As noted above, the Eastern Dublin EIR traffic analysis has been updated over time, most
recently in the 2005 certified Supplemental EIR for the Wallis Ranch project located south and
west ofthe Project (SCH 2003022082). The Wallis Ranch SEIR analyzed cumulative buildout
conditions at the Dublin Boulevard/Dougherty Road intersection, including development of the
Vargas site at the midpoint of the General Plan density range. Supplemental Impact TRA-l
identified the effect of build out traffic at this intersection as significant and unavoidable.
Because development ofthe Vargas site was assumed in the Wallis Ranch SEIR cumulative
buildout analysis of the Dublin Boulevard/Dougherty Road intersection, this Initial Study
incorporates by reference and tiers from that analysis, which is attached as Appendix F and
incorporated herein by reference.
As shown in Table 6, the Level of Service (LOS) at buildout, the Traffic Study determined that
the Dublin Boulevard and Dougherty Road intersection will operate at LOS E. As noted in the
Wallis Ranch SEIR (p. 107) and the Traffic Study, additional improvements to improve the LOS
at the Dougherty Road/Dublin Boulevard intersection to an acceptable LOS D or better under
Buildout Conditions would require adding a fourth northbound left-turn lane on Dougherty Road.
Allowing four lanes of traffic to perform a left-turn movement simultaneously would raise major
concerns regarding the safety of such an operation. Moreover, additional improvements to
reduce traffic impacts at this intersection are not feasible given the physical constraints at the
intersection.
The Traffic Study identified the following two mitigation measures to reduce the previously
identified impact.
Mitigation Measure 30: Improvements at the Dublin Boulevard/Dougherty Road
intersection are included in the Eastern Dublin Traffic Impact Fee (TIF) program.
The project is required to make its fair share payment of impact fees for these
improvements.
Mitigation Measure 31: The project developer shall advance to the City
applicable monies for acquisition of right-of-way and construction of the
improvements assumed in this study for the intersection of Dublin
Boulevard/Dougherty Road. The amount of money advanced to the City shall be
based on the developer's fair share ofthe deficit (spread over those projects that
are required to make up the deficit) between funds available to the City from
Category 2 Eastern Dublin TIF funds and the estimated cost of acquiring the right-
of-way and constructing the improvements. The City will provide credit for
Category 2 Eastern Dublin TIF to the developer for any advance of monies made
Initial Study/Mitigated Negative Declaration for the Vargas Project
City of Dublin 81
March 2007
for the improvements planned for the Dublin BoulevardIDougherty Road
intersection.
Implementation of these mitigations may reduce the impact, but not to a level of less than
significant. Thus, the impact remains significant and unavoidable as identified in the Wallis
Ranch SEIR. There is no impact beyond that identified in the previous SEIR.
On a periodic basis, the City should monitor the operations of Dougherty RoadlDublin
Boulevard, as well as other intersections at the 1-580 interchanges, during the PM peak hour.
Level of service analysis for this intersection should be updated as forecasted peak hour volumes
become available.
Santa Rita Road/I-580 eastbound ramps/Pimlico Drive
Under buildout conditions of Eastern Dublin, the intersection of Santa Rita Road/I-580 eastbound
ramps/Pimlico Drive is expected to operate unacceptably during the PM peak hour. This is a
potentially significant impact.
The following Mitigation Measure shall be implemented to reduce this impact to a less than
significant level:
Mitigation Measure 32: The Project developer shall contribute a pro-rata share of the cost to
improve the Santa Rita Road/I-580 Eastbound Ramp/Pimlico Drive intersection to include a
third left-turn lane for the eastbound off-ramp approach at this intersection and other
downstream improvements including modifications to the striping on the northbound lanes of
the Tassajara Road/I-580 overpass to accept traffic from the third left-turn lane and maintain
three northbound through lanes at the Tassajara Road/I-580 Westbound Ramps intersection.
Alternatively, the Project Developer shall contribute a fair share of the cost to install the
above improvements by payment of the Eastern Dublin Traffic Impact Fee, if the Traffic
Impact Fee is updated to include the above intersection improvements prior to the time
building permits are issued for the Project.
Freeway Impacts
Evaluation of freeway levels of service is a different process than intersection levels of service.
Level of service for freeways is based upon peak hour traffic volumes (number of passenger cars
per hour). In practice as in theory, volume, density and speed are directly correlated, and the
analyst can calculate anyone of these factors knowing the other two. Traffic flow is used as the
basis for freeway levels of service and for calculating the impacts of the project on 1-580 and 1-
680 operations in 2030. Based on Caltrans guidelines, Year 2030 is used for this freeway
analysis under future traffic conditions.
The forecasts for Year 2030 conditions were derived by applying a 10 percent increase to the
forecasted volumes for the Year 2025 conditions. The 10 percent increase is based on an
assumed growth rate of two percent per year for a five-year period. This figure was derived by
examining both past and projected growth rates along the 1-580 corridor. For the period 1994 to
2004 annual traffic increases on 1-580 at the project site were 2.47 percent, based on annual count
information available from Caltrans. There is a 2.13 percent annual growth rate in the 1-580
Initial Study/Mitigated Negative Declaration for the Vargas Project
City of Dublin 82
March 2007
corridor between 2003 (measured counts) and 2025 (CCT A model). Two percent was selected
for the next five years (2025 to 2030) based on the premise that the rate of growth is slightly
declining and the 1-580 corridor is experiencing increasing levels of congestion.
The Project is required to pay for its proportionate share of impacts to 1-580 and 1-680, by
payment of Tri-Valley Transportation Deyelopment (TVTD) Fees to construct planned freeway
improvements, including HOV lanes, auxiliary lanes, and interchange improvements. Pursuant to
Mitigation Measures 3.3/3.0 and 3.3/5.0 of the Eastern Dublin EIR, the Project shall contribute a
proportionate share to the construction of auxiliary lanes on 1-580 by paying a regional fee, which
the City has implemented through Category 3 Eastern Dublin Traffic Impact Fee, followed by the
TVTD Fee. Both the Category 3 Eastern Dublin Traffic Impact Fee and the TVTD Fee (which
has substituted for the Category 3 Eastern Dublin Traffic Impact Fee) include HOV lanes on 1-
580 from Tassajara Road to Vasco Road, as specified in the TVTD Fee Strategic Expenditure
Plan. The Project will also pay for its proportionate share toward public transportation
improvements to help reduce traffic on the freeways and other roadways in the Tri-Valley Area,
by payment of the TVTD Fee. Two of the improvements to be funded by the TVTD Fees are the
West Dublin BART Station and the Express Bus Service from Livermore to the East Dublin
BART station.
The following table provides a summary of the Levels of Service with and without the Project
on the local freeways.
Table 8: Freeway Analysis Summary
Freeway Segment Capacity
1-580,1-680 to Dou he
Eastbound D
Westbound D
1-580, Dou he
Eastbound D
F
F
F
F
D
F
D
D
E
Initial Study/Mitigated Negative Declaration for the Vargas Project
City of Dublin 83
March 2007 .
Freeway Segment Capacity
F
Even without the proposed Project, the study mainline segments along 1-580 and 1-680 in the
vicinity ofthe Project site would operate unacceptably under Year 2030 conditions. The Eastern
Dublin EIR identified impacts to local freeways as a significant and unavoidable impact. The
addition of the Project trips to these freeway segments would remain a significant unavoidable
cumulative impact (Impacts 3.3/B, E and I). There is no impact beyond that analyzed in the
Eastern Dublin EIR.
Alameda County Congestion Management Plan
The proposed Project is consistent with the Alameda County Congestion Management Plan
because the proposed number of dwelling units, 33, is less than what was previously reviewed in
the Eastern Dublin EIR and is less than the number of units permitted by the existing General
Plan on which the Congestion Management Plan is based.
c) Would the Project result in a change in air traffic patterns? NI. The proposed project would have
no impact on air traffic patterns because it is a residential development.
d) Would the project substantially increase hazards due to a design feature or incompatible use?
LS/M. Approval of the Project would result in the construction of new driveways, circulation
routes, and access points. All new streets and other circulation improyements on the site will be
constructed in accordance with City design requirements to provide adequate turning radii, provide
for maximum sight visibility distances and minimize other potential hazards.
The proposed Project will result in the construction of two entrances/exits onto Tassajara Road.
These entrances/exits onto Tassajara Road will provide access to the Project site from northbound
and southbound Tassajara Road and will allow vehicles to exit the property and go northbound or
southbound on Tassajara Road. Without adequate controls, these access point could conflict with
access to the Moller Ranch/Casamira Valley project across Tassajara Road. This is a potentially
significant impact. In order to ensure a safe entrance and exit area, the following mitigation
measure shall be implemented to reduce this impact to a less than significant level:
Mitigation Measure 33: The Site Development Review and Stage 2 Rezone project
plans shall show that the southern entrance/exit on the Project site will line up with
the southern entrance/exit located on the Moller Ranch/Casamira Valley project site.
The developer shall also install a traffic signal at the intersections of Tassajara Road
and the southern entrance/exit for the Project.
Initial Study/Mitigated Negative Declaration for the Vargas Project
City of Dublin 84
March 2007
e) Would the Project result in inadequate emergency access? LS. The proposed Project has been
reviewed with respect to emergency access by the City's Fire Department and the Police
Department. These departments have determined that adequate access will be provided to the site
by the two Project access points. Additionally, by providing a break in the proposed median, as
shown on the Stage 1 Development Plan, to allow a second left turn in lane from northbound
Tassajara Road, both departments will be able to access the site in the event of an emergency from
either entrance.
f) Would the Project result in inadequate parking capacity? LS/M. The proposed Project will be
reviewed in detail during the Stage 2 Rezone and Site Development Review process when detailed
construction level dwelling unit plans are submitted to the City. The City will ensure that adequate
parking will be provided to support the residential development during that review. In order to
ensure that the Project will provide adequate parking to support the development, the following
mitigation measure requires a parking analysis to ensure that the final design of the development
including off-street and on-street parking will support the parking needs of the residential
development:
Mitigation Measure 34: The final project design shall provide adequate parking to
serve the residential development. A detailed parking analysis which reviews on-
street and off-street parking provided for the residential development shall be
submitted in conjunction with the detailed Stage 2 Rezone plans and the Site
Development Review.
g) Would the Project create hazards or barriers for pedestrians or bicyclists? LS. The Project will
include a creekside path, new roads, access to the site and sidewalks. The Stage 1 Development
Plan has been reviewed by City departments and it has been determined that the proposed
development will not create any safety hazards to pedestrians or bicyclists. The Eastern Dublin
EIR also identified impacts related to the safe street crossings for pedestrians and bicycles
(Impacts 3.3P, Street Crossings). Mitigation Measures 3.3/16.0 and 16.1 were included which
required a bicycle/pedestrian path parallel to Tassajara Creek and requires that pedestrian paths
be located so that their crossings of major street coincide with a signalized intersection. The
Vargas property will have a new pedestrian path adjacent to the Creek (see Preliminary Site Plan
for exact location) and signalized intersections as specified above in Mitigation Measure 26.
The signalized intersections can be accessed via a new sidewalk on Tassajara Road as well as by
sidewalks in the Vargas development. Pedestrians can use the new signalized intersections to
access the west side ofTassajara Road and the trail system Neighborhood Square and
community facilities on the Casamira Valley site located east of this project.
XVI. Utilities and Service Systems
The project site is served by the following service providers:
Sewage treatment and local water supply: Dublin San Ramon Services District and Alameda County Flood
Control and Water Conservation District, Zone 7.
Initial Study/Mitigated Negative Declaration for the Vargas Project
City of Dublin 85
March 2007
Regional water supply and distribution: Alameda County Flood Control and Water Conservation District,
Zone 7
Storm drainage: City of Dublin/Alameda County Flood Control and Water Conservation District, Zone 7.
Project Impacts
a) Would the Project exceed wastewater treatment requirements of the RWQCB? LS. The regional
wastewater treatment plant is currently operating in compliance with local, state and federal water
quality standards. Additionally, as previously discussed, the proposed Project area is located within
the Eastern Dublin Specific Plan area and the project has been previously reviewed with respect to
these requirements in the Eastern Dublin EIR. Additionally, impacts that were previously reviewed
have been reduced due to the reduction in the number of dwelling units that will be constructed on
the site. Mitigation Measures 3.5/1.0 through 3.5/22.0 in the Eastern Dublin EIR addresses
wastewater collection, plant capacity, treatment and storage and will apply to this project. The
proposed Project proposes 33 units rather than the 55 units previously studied in the Eastern
Dublin EIR. As a result, the Project would require less water than previously evaluated.
b) Would the Project require new water or wastewater treatment facilities or expansion of existing
facilities? LS. Existing water and sewer lines will need to be extended to serve the Project site. The
extension has been planned as part of the Eastern Dublin Specific Plan and the proposed Project
will not impact this extension and the Dublin San Ramon Services District has determined that
they will be able to serve the development.
c) Would the proposed Project require new storm drainage facilities? LS/M. A new drainage system
will be constructed as part of the construction of this project. The Project will be required to
comply with Mitigation Measure 25 which requires the development of a Stormwater Pollution
Prevention Plan to ensure that the proposed drainage system will accommodate stormwater runoff
from the Project.
d) Are sufficient water supplies available to support the Project? LS. The proposed Project will
increase the demand for water for domestic and irrigation purposes. The increase in water can be
accommodated by Zone 7 and the Dublin San Ramon Services District.
e) Does the current wastewater provider have adequate capacity to serve the project? LS. Approval
of the Project will increase the demand for wastewater treatment over present conditions. The
Dublin San Ramon Services District whose service master plans are based on potential
development under the General Plan.
f) Would the project be served by a landfill with adequate capacity to serve the Project? LS. The City
of Dublin contracts with the Amador Valley Industries Disposal Company to collect solid waste
from households and businesses and transport the waste to the landfill. Amador Valley Industries
also provides recycling services including paper, glass, aluminum, yard waste and food scraps. The
solid waste that would be generated by the Project is less than what was estimated in the Eastern
Dublin EIR because the project proposes to construct fewer units than what is allowed by the
Specific Plan and what was studied in the Eastern Dublin EIR.
Initial Study/Mitigated Negative Declaration for the Vargas Project
City of Dublin 86
March 2007
g) Would the Project comply with federal, state and local statues and regulations related to solid
waster? NI. The City of Dublin and the City's solid waste provider would ensure that developer of
the Project would adhere to federal, state and local solid waste regulations.
XVII. Mandatory Findings of Significance
a) Does the project have the potential to degrade the quality of the environment, substantially reduce
the habitat of fish or wildlife species, cause a fish or wildlife population to drop below self-
sustaining levels, threaten to eliminate a plant or animal community, reduce the number of or
restrict the range of a rare of endangered plant or animal or eliminate important examples of the
major periods of California history or prehistory? LS/M. The analysis indicates that the proposed
Project will not have a significant adverse impact on the overall environmental quality, including
biological resources or cultural resources with adherence to the appropriate Mitigation Measures in
the Eastern Dublin EIR and the Mitigation Measures incorporated in this Mitigated Negative
Declaration. A biological analysis was conducted on the Project site to determine if any plant or
animal species would be impacted as a result of the construction of the proposed Project. Based on
the result of the analysis, which was peer reviewed by a consultant to the City, the Project would
not have any significant impacts to biological resources with the incorporation of the mitigation
measures. Additionally, the Cultural Analysis has determined that there are no know cultural or
historical resources on the Project site that would be impacted as a result of the development ofthe
site.
b) Does the Project have impacts that are individually limited, but cumulatively considerable? LS/M.
Although incremental increases and cumulative effects such as traffic, noise, air emissions and
demand for public services and utilities would occur, these cumulative impacts were adequately
addressed in the Eastern Dublin Environmental Impact Report. Although impacts resulting from
the development of the site will be increased over current conditions, the project is included in the
General Plan and the Eastern Dublin Specific Plan and impacts have been reviewed in both the
Eastern Dublin EIR and this Mitigated Negative Declaration. The proposed development will
result in a lower number of dwelling units that what was previously reviewed in the Eastern Dublin
EIR. No new significant cumulative environmental impacts are expected to occur as a result ofthis
Project with adherence to the appropriate Mitigation Measures in the Eastern Dublin EIR and the
Mitigation Measures incorporated in this Mitigated Negative Declaration.
c) Does the Project have environmental effects which will cause substantial adverse effects on human
beings, either directly or indirectly? LS/M. The development of the proposed Project would not
have any environmental effects in addition to those identified in the Eastern Dublin Environmental
Impact Report, except as identified in this Mitigated Negative Declaration. Based on the project
design, as shown on the Stage 1 Development Plan, and mitigation measures to minimize impacts,
the proposed Project would not have any adverse effects on human being either directly or
indirectly. All of the impacts as a result of this Project have been identified in the Eastern Dublin
EIR or in this Initial Study. No significant impacts on human beings, directly or indirectly, are
expected to occur as a result of the Project with adherence to the appropriate Mitigation Measures
in the Eastern Dublin EIR and the Mitigation Measures incorporated in this Mitigated Negative
Declaration.
Initial Study/Mitigated Negative Declaration for the Vargas Project
City of Dublin 87
March 2007
Appendix A:
Biological Resources Analysis
Initial Study/Mitigated Negative Declaration for the Vargas Project
City of Dublin
March 2007
BIOLOGICAL RESOURCES ANALYSIS
FOR THE
VARGAS/FREDERICK PROPERTY
ALAMEDA COUNTY, CALIFORNIA
Prepared for:
SUN VALLEY LAND DEVELOPMENT CO.
4471 Stoneridge Drive, Suite B
Pleasanton, California 94588
Phone: (925) 461-3580
Contact: Dave Marquardt
Prepared by:
OLBERDING ENVIRONMENTAL, INC.
Wetland Regulatory Consultants
1390 Willow Pass Road, Suite 370
Concord, California 94520
Phone: (925) 825-2111 - FAX (925) 825-2112
Contact: Jeff Olberding
AUGUST 2006
TABLE OF CONTENTS
1.0 INTRODUCTION ........................................................................................................... 1
2.0 LOCATION .................... ......... ................ ................ ................. ......... .... ...... .... .... .... ........ I
3.0 PROPERTY DESCRIPTION .......................................................................................... 1
4.0 REGULATORY SETTING ............................................................................................. 2
4.1 Federal Regulatory Setting ................................................................,.................... 2
4.1.1 Plants and Wildlife......................................................................................2
4.1.2 Wetlands/Waters.... .......................... ................... .............. ...... .................... 2
4.1.3 Migratory Bird Treaty Act .......................................................................... 3
4.2 State Regulatory Setting ......................................................................................... 4
4.2.1 Plants and Wildlife...................................................................................... 4
4.2.2 Wetlands/Waters............. ......... ................ ................ ............ ....................... 5
5.0 METHODS OF ANALYSIS FOR GENERAL BIOLOGICAL RESOURCES.............. 5
5.1 Plant Survey Methods.............................................................................................6
5.1.1 Review of Literature and Data Sources...................................................... 6
5.1.2 Field Surveys.............................. .......... ............ ............. ..,... ............. ........... 7
5.2 Wildlife Survey Methods........................................................................................ 7
5.2.1 Review of Literature and Data Sources ...................................................... 7
5.2.2 Field Surveys. ...... .......... ........ ............. ........................ .................. ............... 8
6.0 RESULTS FOR GENERAL BIOLOGICAL RESOURCES .......................................... 8
6.1 Plant Survey Results ............................................................................................... 9
6.1.1 Floristic Inventory and Habitat Characterization...................................... 9
6.1.2 Special-Status Plant Species..................................................................... 10
6.2 Wildlife Survey Results ........................................................................................ 14
6.2.1 General Wildlife Species and Habitats..................................................... 14
6.2.2 Special-Status Wildlife Species ................................................................. 15
7.0 CONCLUSIONS.... .......... ................ ........ ........ ................ ............ ........ .......... .... ............ 22
7.1 Special-Status Plants.............................................................................................22
7.2 Special-Status Wildlife ......................................................................................... 22
8.0 RECOMMENDATIONS ............................................................................................... 23
9.0 LITERATURE CITED .................................................................................................. 26
11
ATTACHMENTS
ATTACHMENT NO. I
FIGURES
Figure No. I
Figure No.2
Figure No.3
Figure No.4
Figure No.5
Regional Map
Vicinity Map
USGS Quadrangle Map
Aerial Photograph
CNDDB Locations of Special-Status Plants and Animals
ATTACHMENT NO.2
TABLES
Table No. I. Species Observed Within! Adjacent to the Survey Area
Table No.2. Special-Status Species Occurring in the Livermore and
Dublin 7.5 Minute Quadrangle Maps
ATTACHMENT NO. 3
SITE PHOTOGRAPHS
This report should be cited as: Olberding Environmental, Inc. August 2006. Biological Resources Analysis for the
Vargas/Frederick Property, Alameda County. CalifOrnia. Prepared for Sun Valley Land Development Company, Pleasanton,
California.
111
1.0 INTRODUCTION
At the request of Sun Valley Land Development Company, Olberding Environmental, Inc. has
conducted a biological resources analysis ofthe VargasIFrederick Property (Property), located east
of Dublin, Alameda County, California. This biological analysis includes a review of previously
prepared biological reports/information, pertinent literature on habitat characteristics ofthe site, and
a review of information related to species of plants and animals that could potentially utilize the
described habitats. This biological resources analysis included a review of relevant background
information, including the California Natural Diversity Data Base (CNDDB) and the California
Native Plant Society's (CNPS) Inventory of Rare and Endangered Vascular Plants of California, as
well as field investigations. This report documents the methods, results and conclusions for the
reconnaissance level biological resources analysis for the Property.
2.0 LOCATION
The Property is located in Alameda County, just south of the Contra Costa/Alameda County line
(Attachment I, Figure I). The Property is located east of the city of Dublin and is on the west side
of Tassajara Road approximately 2.5 miles north of the Santa Rita exit off Highway 580
(Attachment I, Figure 2). The Property is situated immediately after the first bend on Tassajara
Road where it curves east to cross over Moller Creek (east fork of Tassajara Creek). Access is
gained to the site via Tassajara Road. The property is bounded on the east by Tassajara Road, on the
west by uplands adjacent to Tassajara Creek, on the north by undeveloped lands and on the south by
a residential area (Attachment I, Figure 3). The Property is a part ofthe Tassajara Creek watershed
and is located immediately east ofTassajara Creek. Attachment I, Figure 3 identifies the location of
the property on the USGS 7.5 Quadrangle Map for Livermore. Figure 4 is an aerial map of the
Property .
3.0 PROPERTY DESCRIPTION
The shape and dimension ofthe Property are illustrated on Attachment I, Figure 4. The Property is
irregularly shaped and its eastern boundary is formed by Tassajara Road. Most of the western
boundary is linear and is oriented north to south. Tassajara Creek and associated riparian habitat
lies to the west ofthe Property. The southern Property boundary runs immediately south of Moller
Creek). The confluence ofTassajara and Moller Creek is located several hundred feet southwest of
the subject Property.
The Property is dominated by flat lands and a single hill is positioned at its center. The land has a
gently sloping topography with elevations ranging between 466 to 498 feet and the hill rising to
approximately 525 feet above sea level. The land is currently being used for agricultural purposes
and is dominated by grazed, non-native grassland habitat. The Property contains a horse corral area.
A small grove of eucalyptus trees is located on an adjacent property approximately 100 feet from the
southwestern corner of the subject Property. A short paved road provides access into the Property
from Tassajara Road. Two single family homes, several barns and associated outbuildings are
I
located within the Property boundaries. A horse stable is located on the northern portion ofthe site.
The surrounding land use varies dramatically due to the large size of the Property. Undeveloped
lands lie to the north of the Property. Tassajara Road lies to the east of the Property with newly
developed residential areas located east of the road. The western boundary lies close to Tassajara
Creek and additional open space habitat. South of the Property is a mix of open space with rural
development.
4.0 REGULATORY SETTING
4.1 Federal Regulatory Setting
4.1.1 Plants and Wildlife
The federal Endangered Species Act (ESA) of 1973 (16 USC 1531 et seq., as amended) prohibits
federal agencies from authorizing, permitting, or funding any action that would result in biological
jeopardy to a plant or animal species listed as Threatened or Endangered under the Act. Listed
species are taxa for which proposed and final rules have been published in the Federal Register (U.S.
Fish and Wildlife Service (USFWS], 2006a and 2006b). If a proposed project may jeopardize listed
species, Section 7 ofthe ESA requires consideration of those species through formal consultations
with the USFWS. Federal Proposed species (USFWS, 2006c) are species for which a proposed
listing as Threatened or Endangered under ESA has been published in the Federal Register. If a
proposed project may jeopardize proposed species, Section 7 of the ESA affords consideration of
those species through informal conferences with USFWS. The USFWS defines federal Candidate
species as "those taxa for which we have on file sufficient information on biological vulnerability
and threats to support issuance of a proposed rule to list, but issuance of the proposed rule is
precluded by other higher priority listing actions." (USFWS, 2006c). Federal Candidate species are
not afforded formal protection, although USFWS encourages other federal agencies to give
consideration to Candidate species in environmental planning.
4.1.2 Wetlands/Waters
The federal government, acting through the U.S. Army Corps of Engineers (Corps) and the
Environmental Protection Agency (EP A), has jurisdiction over all "waters of the United States" as
authorized by S404 of the Clean Water Act (CW A) and S 10 of the Rivers and Harbors Act of 1899
(33 CFR Parts 320-330). Projects that cause the discharge of dredged or fill material into waters of
the United States require permitting by the Corps. Actions affecting small areas of jurisdictional
waters ofthe United States may qualify for a Nationwide Permit (NWP), provided conditions of the
permit are met, such as avoiding impacts to threatened or endangered species or to important cultural
sites. Projects that affect larger areas or which do not meet the conditions of an NWP require an
Individual Permit. The process for obtaining an Individual Permit requires a detailed alternatives
analysis and development of a comprehensive mitigation/monitoring plan.
Waters of the United States are classified as wetlands, navigable waters, or other waters. Wetlands
are transitional habitats between upland terrestrial areas and deeper aquatic habitats such as rivers
2
and lakes. Under federal regulation, wetlands are defined as "those areas that are inundated or
saturated by surface or ground water at a frequency and duration sufficient to support, and that under
normal conditions do support, a prevalence of vegetation typically adapted for life in saturated soil
conditions" (33 CFR Part 328.3[b]). Swamps, marshes, bogs, fens and estuaries are all defined as
wetlands, as are seasonally saturated or inundated areas such as vernal pools, alkali wetlands, seeps,
and springs. In addition, portions of the riparian habitat along a river or stream may be a wetland
where the riparian vegetation is at or below the ordinary high water mark and thus also meets the
wetland hydrology and hydric soil criteria.
Navigable waters include all waters subject to the ebb and flow of the tides, including the open
ocean, tidal bays, and tidal sloughs. Navigable waters also include some large, non-tidal rivers and
lakes, which are important for transportation in commerce. The jurisdictional limit over navigable
waters extends laterally to the entire water surface and bed ofthe waterbody landward to the limits
ofthe mean high tide line. For non-tidal rivers or lakes, which have been designated (by the Corps)
to be navigable waters, the limit of jurisdiction along the shoreline is defined by the ordinary high
water mark. Other waters refer to waters of the United States other than wetlands or navigable
waters. Other waters include streams and ponds, which are generally open water bodies and are not
vegetated. Other waters can be perennial or intermittent water bodies and waterways. The Corps
regulates other waters to the outward limit of the ordinary high water mark. Streams should exhibit
a defined channel, bed and banks to be delineated as other waters.
The Corps does not generally consider "non-tidal drainage and irrigation ditches excavated on dry
land" to be jurisdictional waters of the United States (and such ditches would therefore not be
regulated by the Corps (33 CFR Parts 320-330, November 13, 1986). Other areas generally not
considered jurisdictional waters include: 1) artificially irrigated areas that would revert to upland
habitat if the irrigation ceased; 2) artificial lakes and ponds created by excavating and/or diking of
dry land to collect and retain water, used exclusively for such purposes as stock watering, irrigation,
settling basins, orrice growing; 3) waste treatment ponds; 4) ponds formed by construction activities
including borrow pits until abandoned; and 5) ponds created for aesthetic reasons such as reflecting
or ornamental ponds (33 CFR Part 328.3). However, the preamble also states that "the Corps
reserves the right on a case-by-case basis to determine that a particular waterbody within these
categories" can be regulated as a jurisdictional water. The EP A also has authority to determine
jurisdictional waters ofthe U.S. on a case-by-case basis. Riparian habitat that is above the ordinary
high water mark and does not meet the three-parameter criteria for a wetland, would not be regulated
as jurisdictional waters of the United States.
4.1.3 Migratory Bird Treaty Act
Raptors are migratory bird species protected by international treaty under the Migratory Bird Treaty
Act (MBTA) of1918 (16 U.S.c. 703-711). The MBTAmakes it unlawful to take, possess, buy, sell,
purchase, or barter any migratory bird listed in 50 C.F.R. Part 10, including feathers or other parts,
nests, eggs, or products, except as allowed by implementing regulations (50 C.F.R. 21). Sections
3503, 3503.5, and 3800 of the California Department of Fish and Game Code prohibit the take,
possession, or destruction of birds, their nests or eggs. Implementation of the take provisions
requires that project-related disturbance at active nesting territories be reduced or eliminated during
3
critical phases of the nesting cycle (March 1 - August 15, annually). Disturbance that causes nest
abandonment and/or loss of reproductive effort (e.g., killing or abandonment of eggs or young) or
the loss of habitat upon which the birds depend is considered "taking" and is potentially punishable
by fines and/or imprisonment. Such taking would also violate federal law protecting migratory birds
(e.g., MBTA).
4.2 State Regulatory Setting
4.2.1 Plants and Wildlife
Project permitting and approval requires compliance with California Environmental Quality Act
(CEQA), the 1984 California Endangered Species Act (CESA), and the 1977 Native Plant Protection
Act (NPPA). The CESA and NPPA authorize the California Fish and Game Commission to
designate Endangered, Threatened and Rare species and to regulate the taking of these species
(SS2050-2098, Fish & Game Code). The California Code of Regulations (Title 14, S670.5) lists
animal species considered Endangered or Threatened by the State.
The Natural Heritage Division ofthe California Department ofFish and Game (CDFG) administers
the state rare species program. The CDFG maintains lists of designated Endangered, Threatened,
and Rare plant and animal species (CDFG, 2006 and 2005). Listed species either were designated
under the NPP A or designated by the Fish and Game Commission. In addition to recognizing three
levels of endangerment, the CDFG can afford interim protection to candidate species while they are
being reviewed by the Fish and Game Commission.
The CDFG also maintains a list of animal species of special concern (CDFG, 2006), most of which
are species whose breeding populations in California may face extirpation. Although these species
have no legal status, the CDFG recommends considering them during analysis of proposed project
impacts to protect declining populations and avoid the need to list them as endangered in the future.
Under provisions of SI5380(d) of the CEQA Guidelines, the project lead agency and CDFG, in
making a determination of significance, must treat non-listed plant and animal species as equivalent
to listed species if such species satisfy the minimum biological criteria for listing. In general, the
CDFG considers plant species on List IA (Plants Presumed Extinct in California), List lB (Plants
Rare, Threatened, or Endangered in California and elsewhere), or List 2 (Plants Rare, Threatened, or
Endangered in California, but More Common Elsewhere) of the California Native Plant Society's
(CNPS) Inventory of Rare and Endangered Vascular Plants of California (Skinner and Pavlik 1994)
as qualifying for legal protection under S l5380(d). Species on CNPS List 3 or 4 may, but generally
do not, qualify for protection under this provision.
Sensitive habitats include riparian corridors, wetlands, habitats for legally protected species and
CDFG Species of Special Concern, areas of high biological diversity, areas providing important
wildlife habitat, and unusual or regionally restricted habitat types. Habitat types considered
sensitive include those listed on the California Natural Diversity Data Base's (CNDDB) working list
of "high priority" habitats (i.e., those habitats that are rare or endangered within the borders of
California) (Holland, 1986).
4
4.2.2 Wetlands/Waters
The Regional Water Quality Control Board (RWQCB) regulates activities in wetlands and other
waters through 9401 of the Clean Water Act. Section 40 1 requires a state water quality certification
for projects subject to 404 regulations. Requirements of the certification include mitigation for loss
of wetland habitat. In the San Francisco Bay region, the RWQCB may take the lead over the Corps
in determining wetland mitigation requirements. California Fish and Game Code SS 1600-1607
require the CDFG be notified of any activity that could affect the bank or bed of any stream that has
value to fish and wildlife. Upon notification, the CDFG has the discretion to execute a Streambed
Alteration Agreement. The CDFG defines streams as follows:
"... a body of water that flows at least periodically.. . through a bed or channel having banks
and supportingfish and other aquatic life. This includes watercourses having a subsurface
flow that supports or has supported riparian vegetation. "
(Streambed Alteration Program, California Department ofFish and Game).
In practice, CDFG authority is extended to any "blue line" stream shown on a USGS topographic
map, as well as unmapped channels with a definable bank and bed. Wetlands, as defined by the
Corps, need not be present for CDFG to exert authority.
5.0 METHODS OF ANALYSIS FOR GENERAL BIOLOGICAL RESOURCES
A special-status plant and wildlife species database search and review was conducted using the
CNDDB and other sources. An additional search was conducted for special-status plants using
California Native Plant Society Inventory on-line (CNPS). Special-status species reports were
accessed by searching the CNDDB database by the Livermore and Dublin 7.5-minute quadrangles,
which surround the Property, and by examining those species that have been identified in the
vicinity ofthe Property. The database report identified special-status species known to occur in the
region or those that have the potential to occur in the vicinity ofthe Property. The CNDDB report
was used to focus special-status species analysis of the site prior to the reconnaissance surveys
(CNDDB 2006).
Olberding Environmental biologists conducted an initial reconnaissance-level survey of the Property
on June 1,2006. A second survey was performed on August 7, 2006, for the purpose of performing
a focused plant survey and nesting raptor survey. All surveys consisted of walking throughout the
site and evaluating the Property and adjacent lands for potential biological resources. Existing
conditions, observed plants and wildlife, adjacent land use, soils and potential biological resource
constraints were recorded during the visit. Plant and wildlife species observed within and adjacent
to the Property during the surveys are included in Attachment 2, Table 1.
The objectives ofthe field surveys were to determine the potential presence or absence of special-
status species habitat listed in the CNDDB database report and to identifY any wetland areas that
could be potentially regulated by the Corps (CNDDB 2006). In addition, Olberding EnvironmentalC
5
biologists looked for other potential sensitive species or habitats, which may not have been obvious
from background database reports or research. Surveys conducted after the growing season or
conducted outside of the specific flowering period for a special-status plant cannot conclusively
determine the presence or absence of such plant species; therefore, site conditions and habitat type
were used to determine potential for occurrence. When suitable habitat was observed to support a
special-status plant or animal species it was noted in the discussion for that particular species.
Regulatory agencies evaluate the possibility of occurrence based on habitats observed on site and the
degree of connectivity with other special-status animal habitats in the vicinity ofthe Property. These
factors are discussed in each special-status plant or animal section.
Sources consulted for agency status information include USFWS (2005a, 2005b) for federally listed
species and CDFG (2005a) for State of California listed species. Based on information from the
above sources, Olberding Environmental developed a target list of special-status plants and animals
with the potential to occur within or in the vicinity of the Property (Attachment 2, Table 2).
5.1 Plant Survey Methods
The purposes ofthe botanical surveys were (I) To characterize the habitat types (plant communities)
of the study area; (2) to determine whether any suitable habitat for any special-status plant species,
occurs within the study area; and (3) to determine whether any sensitive habitat types (wetlands)
occur within the study area. Site conditions and plant habitat surveys are important tools in
determining the potential occurrence of plants not recorded during surveys (e.g., special-status
plants) because presence cannot conclusively be determined if field surveys are conducted after the
growing season or conducted outside a specific flowering period.
The surveys followed the CDFG (2000) and CNPS (2001) published survey guidelines. These
guidelines state that special-status surveys should be conducted at the proper time of year when
special-status and locally significant plants are both evident and identifiable. These guidelines also
state that the surveys be floristic in nature with every plant observed identified to the species,
subspecies, or variety as necessary to determine their rarity status. Finally, these surveys must be
conducted in a manner that is consistent with conservation ethics and accepted plant collection and
documentation techniques. Following these guidelines, surveys were conducted during the time
period when special-status plant species from the region were known to be evident and flowering.
All regions of the property were examined by walking line transects through the entire site, and by
closely examining the microhabitats that could potentially support special-status plants.
All the plants found on the project site were identified to species. A list of all vascular plant taxa
encountered with in the project site was recorded in the field. Plants that needed further evaluation
were collected and keyed in the lab. Final determinations for collected plant material were made by
keying using The Jepson Manual.
5.1.1 Review of Literature and Data Sources
6
Botanists from Olberding Environmental conducted focused surveys ofIiterature and special-status
species databases in order to identifY special-status plant species and sensitive habitat types with
potential to occur in the study area. Sources reviewed include: CNDDB occurrence records
(CNDDB 2006) and CNPS Inventory (Skinner and Pavlik 1994) for the Livermore and Dublin
USGS 7.5 quadrangles; and standard flora (Hickman 1993). From the above sources, a list of
special-status plant species with potential to occur in the project vicinity was developed (Attachment
2, Table 2).
5.1.2 Field Surveys
An Olberding Environmental botanist conducted a reconnaissance-level survey to determine habitat
types and the potential for special-status plants based on the observed habitat types on June 1,2006.
All vascular plant species that were identifiable at the time of the survey were recorded and
identified using keys and descriptions in Hickman (1993).
A second survey was performed on August 7, 2006, in order to focus on the identification of special-
status plant species recognized as having the potential to occur on the Property based on the
observed habitat types and reviewed CNDDB records. The habitat types occurring on the Property
were characterized according to pre-established categories. In classifYing the habitat types on the
site, the generalized plant community classification schemes of A Manual of California Vegetation
(Sawyer and Keeler-Wolf 1995) were consulted. The final classification and characterization ofthe
habitat types of the study area were based on field observations.
5.2 Wildlife Survey Methods
The purposes of the wildlife surveys were to identifY special-status wildlife species and/or potential
special-status wildlife habitats within the study area.
5.2.1 Review of Literature and Data Sources
A focused review ofIiterature and data sources was conducted in order to determine which special-
status wildlife species had potential to occur in the vicinity of the Property. Current agency status
information was obtained from USFWS (2006b, c) for species listed as Threatened or Endangered,
as well as Proposed and Candidate species for listing, under the federal ESA; and from CDFG (2005,
2005b) for species listed as Threatened, or Endangered by the state of California under the CESA, or
listed as "species of special concern" by CDFG. From the above sources, a list of special-status
wildlife species with potential to occur in the project vicinity was developed (Attachment 2, Table
2).
7
5.2.2 Field Surveys
General Wildlife Survev
Olberding Environmental biologists conducted surveys of species habitat within the entire study
area, including visible portions of the adjacent properties on June I and August 7, 2006. The
purpose of the habitat surveys was to evaluate wildlife habitats and the potential for any protected
species to occur on or adjacent to the Property.
Reconnaissance-Level Raptor Survev
Reconnaissance-level raptor surveys were conducted on the Property on June I and August 7, 2006.
Observation points were established on the periphery ofthe Property to view raptor activity over a
fifteen to thirty-minute time period. This survey was conducted with the use of binoculars and notes
were taken for each species occurrence. Additionally, utility poles and perch sites in the vicinity of
the Property were observed. All raptor activity within and adjacent to the Property was recorded
during the reconnaissance-level observation period.
Reconnaissance-Level Burrowing Owl (Athene cunicularia) Survev
Reconnaissance-level burrowing owl (Athene cunicularia) surveys were also conducted on the
Property on June I and August 7, 2006 to identify potential burrow sites or burrowing owl use of on-
site habitat. The general presence and density of suitable burrow sites (e.g., rodent burrows) was
evaluated for the Property. Rodent burrows encountered during the site visit were investigated for
presence of potential burrowing owl residence. Each potential burrow observed was evaluated for
the presence of castings, whitewash, bones, feathers or other signs of burrowing owl habitation.
Observations were recorded. The fence line around the Property and any potential perching sites
were investigated for signs of castings at the base of the posts.
Special-Status Plant Survevs
Habitats known to potentially support special-status plant species, and areas in which special-status
plants had previously been known to occur were surveyed on June I, 2006. These areas were
surveyed to determine if special-status plants were still present, and the approximate number of
plants that were present. A second focused survey was performed on August 7, 2006.
6.0 RESULTS FOR GENERAL BIOLOGICAL RESOURCES
The search and review of the CNDDB database reports revealed the occurrence of special-status
plant and wildlife species that occur in annual grassland, coastal oak woodland, and valley foothill
riparian habitats (CNDDB 2006). The CNDDB database and background data were reviewed for the
Livermore and Dublin 7.5 minute quadrangles (Attachment 2, Table 2). Those animals listed in
Attachment 2, Table 2 were reviewed for their potential to occur on the Property based on general
8
habitat types. Many of the plant and animal species identified by the CNDDB in the quadrangles
require a specific habitat microclimate that was found not to occur within the Property.
6.1 Plant Survey Results
6.1.1 Floristic Inventory and Habitat Characterization
In classifYing the habitat types on the Property, generalized plant community classification schemes
were used (Sawyer and Keeler-Wolf 1995). The final classification and characterization of the
habitat types of the study area were based on field observations.
Annual Grassland
The grassland habitat on the Property best corresponded with the annual grassland description found
in Mayer (1988). The annual grassland is found on the sloping hillsides and flat lands throughout
the Property. The grassland is dominated by wild oat (Avena fatua), ripgut brome (Bromus
diandrus) and soft chess (Bromus hordeaceous), while the broadleafplants consist of winter vetch
(Vicia villosa), red-stemmed filaree (Erodium cicutarium), and sheep sorrel (Rumex acetosella).
Valley Foothill Riparian
Abundant riparian habitat grows along both the Moller Creek and Tassajara Creek corridors. The
riparian vegetation forms a dense cover over most of the channel features. The habitat on the
Property (Moller Creek) is more accurately described as a willow dominated riparian corridor with
associate tree species. The arroyo willow (Salix lasiolepis) is the dominant riparian tree species and
forms dense thickets across and along the waterway. Live oak (Quercus agrifolia) trees form the
border the riparian habitat. The edges of the riparian areas are vegetated with mugwort (Artemisia
douglasiana), poison oak (Toxicodendron diversilobum), blackberry (Rubus ursinus), and annual
grasses. Some areas are overwhelmed with the growth of invasive species.
Creek Channel
A portion of Moller Creek flows across the southern portion ofthe Property. The creek area includes
the channel, adjacent side slopes and floodplain terraces below the top of the creek banks. The
channel segment flowing through the Property is generally in a degraded state due to extreme
erosion which has resulted in a 15-20 foot eroded channel section. The cross-section is complex and
represents an geomorphologic state with moderately to steeply sloped banks, generally with signs of
over-steepening or significant erosion. The channel is moderately sinuous and has not been
straightened or engineered. The creek gradient is moderate and the elevation drops are relatively
stable. Erosion is evident both up- and downstream providing further evidence that this is a
relatively unstable system.
The channel feature was observed to be dry with the exception of several shallow stagnant pools.
The average water depth in the pools measured approximately 3-5 inches. The channel contains a
bed composed primarily of sand and fine sediment with several small areas containing small to
9
medium sized cobble. The average width of the channel was estimated to be 8 feet based on
measurements taken during the second reconnaissance survey. The channel bottom did not contain
any areas dominated by wetland or hydrophytic species. Common species observed on the
embankments included mugwort, poison oak, blackberry, and annual grasses.
Seasonal Wetland Habitat
Three small potential seasonal wetland features occur along the base of a hill located at the northern
portion of the Property. These wetlands appear to have formed as a result of irrigation and/or a
leaking pool structure. Most of this area was devoid of any standing water at the time ofthe survey,
however, 6 shallow depressions dug in the soil filled with water in several minutes. The seasonal
wetland was dominated by English plantain (Plantago lanceolata), harding grass (Phalaris
aquatica), tall flatsedge (Cyperus eragrostis), Himalayan blackberry, hyssop loosestrife (Lythrum
hyssopifolia), curly dock, redstem filaree (Erodium cicutarium), annual rabbit's-foot grass
(Polypogon monspeliensis), and Italian ryegrass. The soil in this area was saturated at the time of
the survey and also showed signs of hoof shear, which is used as an indicator of wetland hydrology.
This wetland area exhibited a dominance ofhydrophytic vegetation and meets the Corps vegetation
criteria to be determined a wetland.
6.1.2 Special-Status Plant Species
Special-status plant species include species listed as Rare, Threatened, or Endangered by the
USFWS (2006a) or by the State of California (CDFG, 2006a). Federal Proposed and Candidate
species (USFWS, 2006b) are also special-status species. Special-status species also include species
listed on List lA, List lB, or List2 ofthe CNPS Inventory (Skinner and Pavlik, 1994; CNPS 2005).
All species in the above categories fall under state regulatory authority under the provisions of
CEQA, and may also fall under federal regulatory authority. Considered special-status species are
species included on List 3 (Plants about Which We Need More Information-A Review List) or List 4
(Plants of Limited Distribution-A Watch List) of the CNPS Inventory. These species are considered to
be of lower sensitivity, and generally do not fall under specific state or federal regulatory authority.
Specific mitigation considerations are not generally required for List 3 and List 4 species.
A CNDDB map of special status plants occurring in the vicinity of the Property is provided in
Attachment 1, Figure 5. Attachment 2, Table 2 includes a list of special-status plants with the
potential to occur within or in the immediate vicinity ofthe Property based on a review ofthe USGS
7.5 minute quadrangles for Livermore and Dublin. The special-status plant species identified by the
CND D B as potentially occurring in the Property are known to grow only from specific habitat types.
The specific habitats or "micro-climate" necessary for most of the plant species to occur are not
found within the boundaries of the subject Property. The habitats necessary for the CNDDB
reported plant species consist of non-native annual grassland, chaparral, coastal scrub, coastal dunes
alkaline flats, and marshes or swamps. The following special status plant species were reviewed for
their potential to occur on the Property.
Heartscale (Atriplex cordulata). CNPS List tB.
10
Heartscale is an annual shrub of the family Chenopodiaceae, the Goosefoot family. Leaves and
stems of this bush are gray and scaly. It has a pistillate inflorescence with bracts in fruit of3.5 to 5
mm, fused to the middle. Heartscale can be found in Alameda, Contra Costa, and Merced Counties
among others, but is considered extirpated in San Joaquin, Stanislaus, and Yolo Counties. It is
found in chenopod scrub, meadow, seep, and saline or alkaline valley and foothill grassland habitats,
and blooms from April through October.
The annual grassland habitat on the Property is considered potentially suitable for heartscale. There
are no CNDDB occurrences ofheartscale within a five-mile radius ofthe Property. Due to the lack
of recent occurrences and this history of grazing on the Property, heartscale is considered unlikely to
be present on the site. Focused surveys for heartscale were conducted during the recognized
blooming period in 2006. Results of the spring/summer surveys resulted in a negative finding for
heartscale. This species is not present on the Property.
Brittlescale (Atriplex depressa). CNPS List lB.
Brittlescale is an annual herb in the Goosefoot family. The leaves ofthis plant are ovate to cordate
and covered in a dense white scale. It has a pistillate inflorescence with bracts in fruit 2 to 3.5 mm,
fused near the top. Fruit is ovate or diamond-shaped and covered in a white scale. This species is
generally found in chenopod scrub, meadow, seep, playa, valley and foothill grassland, and vernal
pool habitats in alkaline, clay soils. It occurs in Alameda, Contra Costa, Colusa, Fresno, Glenn,
Merced, Solano, Tulare, and Yolo Counties. The blooming period is from May to October. Threats
to brittlescale include grazing and development.
The annual grassland habitat on the Property is considered potentially suitable for brittlescale. There
are no CNDDB occurrences of brittle scale within a five-mile radius ofthe Property. Due to the lack
of recent occurrences, and the history of grazing on the Property, brittlescale is considered unlikely
to be present. Focused surveys for heartscale were conducted during the recognized blooming
period in 2006. Results of the spring/summer surveys resulted in a negative finding for heartscale.
This species is not present on the Property.
San JoaQuin Svearscale (Atriplex ioaQuiniana). CNPS List lB.
San Joaquin spearscale is an annual herb in the family Chenopodiaceae. Leaves of the San Joaquin
spearscale are ovate to triangular, with fine gray scales above. Flowers are dense and spike or
panicle-like with dark brown seeds. It is found in Alameda, Contra Costa, Merced, Monterey, Napa,
Sacramento, San Benito, Solano, and Yolo Counties. It is considered extirpated in Santa Clara, San
Joaquin, and Tulare counties. Habitat for the San Joaquin spearscale includes chenopod scrub,
meadows, seeps, playas, and valley and foothill grasslands with alkaline soils. Blooming occurs
between April and October. Three occurrences ofthis species have been made from 1996 to 2004
within the vicinity ofthe Project Site. The closest occurrence was recorded 1993 (Occurrence #35),
where approximately 10,000 plants were observed in Amador Valley approximately 0.4 miles west
of Fallon Road, located at a distance of approximately 1.8 miles south southeast ofthe Property.
11
Due to the occurrence of this species in the areas surrounding the Property and the presence of
suitable habitat on the site, San Joaquin spearscale was considered somewhat likely to be present on
the Property. Directed surveys were conducted during the recognized blooming period in 2006.
Results of the spring/summer surveys resulted in a negative finding for San Joaquin spearscale. This
species is not present on the Property.
Con2don's Tarvlant (Centromadia parrvi ssp. conf!doniil. CNPS List IB
Congdon's tarplant is a member ofthe genus Hemizonia in the sunflower family (Asteraceae). It is one
of four subspecies of Parry's tarplant (Hemizonia parryi). Congdon's tarplant is a prostrate to erect,
annual herb with rigidly spine-tipped leaves and yellow ray- and disk- flowers (head). It occurs in valley
and foothill grasslands in moist alkaline soils and blooms between June and November. Historically,
Congdon's tarplant was distributed from Solano County south to San Luis Obispo County. The non-
native annual grassland on the Property is potentially suitable habitat to support this species.
Several observations of this species have been made in the vicinity of the Property. The closest
occurrence ofthis species to the vicinity ofthe Property was documented in 1998 (Occurrence #43),
where approximately 9,600 individuals were observed in grassland habitat along Tassajara Road
about 2.2 miles north ofI-580, north of Pleasanton, at a location that is immediately south ofthe
Property. The plant has been sighted along Tassajara Road about 0.7 miles north ofI-580, north of
Pleasanton approximately 1.5 miles south of the Property.
Due to the occurrence of this species in the areas surrounding the Property and the presence of
suitable habitat on the site, Congdon's tarplant was considered somewhat likely to be present on the
Property. Directed surveys were conducted during the recognized blooming period in 2006. Results
ofthe spring/summer surveys resulted in a negative finding for Congdon's tarplant. This species is
not present on the Property.
Palmate-Bracted Bird's-Beak (Cordvlanthus palmatus). Federal Endan2ered, California
Endan2ered, CNPS List lB.
Palmate-bracted bird's-beak is endemic to California. It is considered seriously endangered in this
state. This plant is gray-green in color, glandular and hairy. Flowers are whitish with pale lavender
sides. Palmate-bracted bird's-beak occurs in Alameda, Colusa, Fresno, Madera, and Yolo Counties,
but is considered extirpated in San Joaquin County. It is found in chenopod scrub, and valley and
foothill grassland habitats with alkaline soils. Blooming occurs between May and October.
The annual grassland habitat is considered potentially suitable for palmate-bracted bird's-beak.
There are no occurrences ofthis species within a five-mile radius ofthe Property. Due to the lack of
recent occurrences, and the history of grazing, palmate-bracted bird's-beak is considered unlikely to
be present on the site. Focused surveys for heartscale were conducted during the recognized
blooming period in 2006. Results of the spring/summer surveys resulted in a negative finding for
heartscale. This species is not present on the Property.
12
Diablo Helianthella (Helianthella castanea) CNPS lB.
Diablo helianthella is a perennial that exhibits yellow sunflowers that bloom between April and
June. The plant has simple broad leaves that are attached at the base of the stem and grows up to
two feet in height. The Diablo helianthella is known to grow in broadleaved upland forest,
chaparral, cismontane woodland, coastal scrub, riparian woodland, and valley and foothill grassland
habitats.
The annual grassland habitat within the Property considered potentially suitable for Diablo
helianthella. There are no CNDDB occurrences of this species within a five-mile radius of the
Property, so this species is considered unlikely to be present on the site. Focused surveys for
heartscale were conducted during the recognized blooming period in 2006. Results of the
spring/summer surveys resulted in a negative finding for heartscale. This species is not present on
the Property.
Hairless Popcorn Flower (Plaldobothrvs Idaber). CNPS List lA
Hairless popcorn flower is an annual herb that is a member of the forget-me-not (Boraginaceae)
family. Hairless popcorn flower is on CNPS List IA. It has no federal or state listing status.
Historically, this plant occurred in Alameda, Merced, Marin, San Benito and Santa Clara Counties,
however, this species is now presumed extirpated throughout this entire region. This species was
last observed in Livermore in 1942 and is presumed absent from the site. Hairless popcorn flower is
associated with meadows and seeps in alkaline soils, and in coastal salt marshes and swamps.
Potential seep habitat was observed on the Property, however, alkali soils were absent from those
locations. Focused surveys for the hairless popcorn flower were not conducted during the recognized
blooming period (March-May) in 2006. Results ofthe spring/summer surveys resulted in a negative
finding for hairless popcorn flower. Based on the limiting factors described above, this species
would not be expected to be present on the Property.
Saline Clover (Trifolium defJaufJeratum var. hvdrofJhilum). CNPS List lB.
Saline clover is a member of the pea family, Fabaceae. It blooms between April and June. This
species is found in marshes and swamps, mesic valley and foothill grasslands with alkaline soils, and
vernal pools, between 0 and 300 meters in elevation. It is thought to occur in Alameda, Colusa,
Monterey, Napa, San Benito, Santa Clara, San Luis Obispo, San Mateo, Solano, and Sonoma
Counties. It is threatened by development and current fieldwork is needed to determine if
populations still exist in many counties.
The closest occurrence of this plant to the Property was documented in 2002 when 60 plants were
sighted east of Tassajara Road, north of highway 580, south of Dublin Avenue, at a location that is
approximately 2.2 miles south of the Property. Due to the occurrence ofthis species in the areas
surrounding the Property and the presence of suitable habitat on the site, Congdon's tarplant was
considered somewhat likely to be present on the Property. Directed surveys were conducted during
the recognized blooming period in 2006. Results of the spring/summer surveys resulted in a negative
finding for Congdon's tarplant. This species is not present on the Property.
13
Caper-Fruited Tropidocarpum (TrofJidocarfJum cafJfJarideum). CNPS List lB
Caper-fruited tropidocarpum is an annual herb from the mustard family (Brassicaceae). This species
was once found in Alameda, Contra Costa, Glenn, Monterey, Santa Clara, San Joaquin, and San Luis
Obispo Counties. It is now presumed extirpated in all but San Luis Obispo County. This species is
known to occur on hillsides in valley and foothill grassland habitats with alkaline soils.
The annual grassland habitat is considered potentially suitable for caper-fruited tropidocarpum.
This species occurred historically in the lands east of the city of Livermore, but has not been
recorded in the area since 1897. Caper-fruited tropidocarpum is associated with valley and foothill
grasslands on alkaline hills. This habitat was observed on the Property. Focused surveys for the
caper-fruited tropidocarpum were not conducted during the recognized blooming period (March-
April) in 2006. Results ofthe spring/summer surveys resulted in a negative finding for caper-fruited
tropidocarpum. Based on the limiting factors described above, this species would not be expected to
be present on the Property.
6.2 Wildlife Survey Results
6.2.1 General Wildlife Species and Habitats
Wildlife species commonly occurring within habitat types present on the Property are discussed on
the following page:
Non-native Annual Grassland
Botta's pocket gopher (Thomomys bottae) and meadow voles (Microtus californicus), subspecies
unknown, tunnel tailings were observed in the non-native grassland habitat in the Property area. The
grassland habitat is also suitable nesting habitat for the burrowing owl and northern harrier. Small
mammals that forage on the seeds and plants found in annual grasslands include field mouse
(Peromyscus sp.), California ground squirrel (Spermophilus beecheyi), and black-tailed jack rabbit
(Lepus californicus). California ground squirrel and black-tailed jackrabbit were observed during
the survey. The identification of small mammals in these grassland areas makes them potential
foraging sites for raptors such as hawks and owls, and other predators such as snakes and feral cat
(Felis cattus). Typical reptile species that would be expected to occur in this habitat could include
western fence lizard (Sceloporus occidentalis), and gopher snakes (Pituophis catenifer). Passerine
birds (having feet adapted to perching) noted in the non-native grassland include, mourning dove
(Zenaida macroura), and black phoebe (Sayornis nigricans). A red-tailed hawk (Buteo jamaicensis)
was observed foraging in the grassland. A grove of eucalyptus trees is also located immediately
south of the Property in the non-native grassland habitat.
Willow Riparian and Oak Woodland
Numerous passerines are found within the willow riparian habitat including species such as the plain
titmouse (Parus inornatus), acorn woodpecker (Melanerpesformicivorus) California towhee (Pipilo
14
fuscus), yellow-rumped warbler (Dendroica coronata), chestnut-backed chickadee (Parus
rufescens), and bushtit (Psaltriparus minimus). The willow riparian habitat on the Property provides
nesting opportunities for passerines and raptor species. The trees in the riparian and oak woodland
areas are appropriate for use by both raptors and smaller bird species. The red-shouldered hawk and
American kestrel could find suitable nesting opportunity within the wooded habitats on the Property.
A small grove of eucalyptus trees were observed directly outside of the southwestern Property
boundary. These trees could provide potential nesting sites for various raptor species.
Creek Channel
The riparian habitat provided in the creek corridor is used by many species due to the presence of
vegetation cover and potential food sources. Mammals such as raccoon (Procyon lotor) and
opossum (Didelphis virginiana) use the corridor for local movement, food and cover, but were not
actually observed on the site. The western pond turtle and the California red-legged frog are known
to be on the site and use habitats within the riparian areas. Also, numerous bird species are found in
the creek corridor as there is an abundant food source of insects within the trees. The birds observed
along the creek corridor consisted of spotted towhee (Pipilo maculatus), California towhee (Pipilo
crissalis), white-breasted nuthatch (Sitta carolinensis), and plain titmouse (Parus inornatus) to name
a few. Please see Table 2 of Attachment 2 for a complete list of wildlife observed on the Property.
Seasonal Wetland Habitat
During rainy periods, the seasonal wetlands support wildlife species such as Pacific treefrogs
(Pseudacris regilla), western toads (Bufo boreas), and small invertebrates. Wading birds such as
snowy egret (Egretta thula), great egret (Ardea alba), great blue heron (Ardea herodias), killdeer
(Charadrius vociferous), and common snipe (Gallinago gallinago) may forage in these areas during
wet conditions as well. Although the majority of the potential wetland was dry at the time of the
survey, water was observed to saturate the soil to the surface providing prolonged foraging for these
species into the summer months. During the dry season, wildlife species that use the annual
grasslands will be found in the seasonal wetlands.
6.2.2 Special-Status Wildlife Species
A CNDDB map of special status plants occurring in the vicinity of the Property is provided in
Attachment I, Figure 5. Attachment 2, Table 2 includes a list of special-status wildlife species with
potential to occur in the project area. Special-status wildlife species include species listed as Rare,
Threatened, or Endangered by the USFWS (2005b & 2005c) or by the State of California (CDFG,
2005b).
The search and review of the CNDDB database reports revealed the occurrence of special-status
species that could potentially occur in the annual grassland, developed, and seasonal wetland
habitats supported by the Property. In addition, several state-protected raptors could forage and nest
on the Property. Attachment 2, Table 2 provides a summary ofthe species, their status, and habitat
requirements. For the analysis of the site, the following specific discussions on the special-status
15
wildlife included the following species:
INVERTEBRATES
Vernal Pool Fairv Shrimp (Branchinecta lvnchi). Federal Threatened.
The vernal pool fairy shrimp is approximately 3/4 inches in length. This species inhabits seasonal
wetlands such as alkaline pools, intermittent drainages, drainage ditches, oxbows, stockponds, and
vernal pools and swales. The eggs of the vernal pool fairy shrimp become encysted during dry
periods and hatch when seasonal wetlands refill. Threats to the vernal pool fairy shrimp include loss
of habitat, agriculture, foot traffic, and off-road vehicles.
There are no listed CNDDB occurrences of this species within a five-mile radius of the Property.
The closest sighting located approximately 6.4 miles east south east of the Property was recorded in
1996. The sighting was documented 0.6 mile east ofthe intersection of Hartford Avenue and North
Livermore Avenue, 1.3 miles north of interstate 580 in seasonal wetland habitat surrounded by non-
native annual grassland upland habitat. Due to the lack of nearby occurrences and suitable vernal
pools or seasonal wetlands required for successful breeding, the vernal pool fairy shrimp is
considered unlikely to occur on site. This species is presumed to be absent from the Property.
AMPHIBIANS
California Red-Let!t!ed Frot! (Rana aurora dravtoniil. Federallv Threatened. California
Species of Concern.
California red-legged frog (CRLF) is a State Species of Concern and is federally listed as threatened.
The CRLF is found in lowlands, foothill woodland and grasslands, near marshes, lakes, ponds or
other water sources. These amphibians require dense shrubby or emergent vegetation closely
associated with deep still or slow moving water. Generally these frogs favor intermittent streams
with water at least 2.5 feet deep and where the shoreline has relatively intact emergent or shoreline
vegetation. The red-legged frog is known from streams with relatively low gradients and those
waters where introduced fish and bullfrogs are absent. The red-legged frog occurs west ofthe Sierra
Nevada-Cascade and in the Coast Ranges along the entire length of the state.
The Tassajara Creek channel is considered potentially suitable breeding habitat for CRLF. The
creek contains abundant emergent vegetation in pool habitat that is appropriate CRLF breeding
habitat. There are multiple occurrences ofCRLF in the immediate vicinity of the Property. CRLF
have been previously documented in Tassajara Creek at a location that is within a mile of the
Property (1992 sighting). CRLF have also been documented in pool habitat within a tributary to
Tassajara Creek located approximately 0.5 miles southeast ofthe Property (1999 sighting). A third
recent sighting within a mile of the Property is a sighting located within the east fork of Tassajara
Creek, approximately 0.4 miles northeast of the Property (1998 sighting). CRLF are expected to
occur throughout the Tassajara Creek watershed in creek, riparian and upland habitat with
appropriate cover for frogs. This species was not observed during the 2006 survey.
16
California Tieer Salamander (Ambvstoma californiense) FederaIThreatened/Endant!ered.
California Species of Concern
Adult California tiger salamanders inhabit rolling grassland and oak savannah. Adults spend most
of the year in subterranean retreats such as rodent burrows, but may be found on the surface during
dispersal to and from breeding sites. The preferred breeding sites are vernal pools and other
temporary ponds. However, CTS may use permanent manmade ponds as breeding habitat.
California tiger salamander adults begin migrating to ponds after the first heavy rains of fall and can
be found in or around the breeding ponds during and after winter rainstorm events. In extremely dry
years, California tiger salamanders may not reproduce. After mating, females lay several small
clusters of eggs, which contain from I to over 100 eggs. The eggs are deposited on both emergent
and submerged vegetation, as well as submerged detritus. A minimum often weeks is required to
complete larval development through metamorphosis, at which time the larvae will normally weigh
about 10 grams. Larvae remaining in pools for a longer time period can grow to much larger sizes.
Upon metamorphosis, juvenile California tiger salamanders migrate in large masses at night from the
drying breeding sites to refuge sites. Prior to this migration, the juveniles spend anywhere from a
few hours to a few days near the pond margin. Adult California tiger salamanders are largely
opportunistic feeders, preying upon arthropod and annelid species that occur in burrow systems, as
well as aquatic invertebrates found within seasonal pools. The larvae feed on aquatic invertebrates
and insects, showing a distinct preference for larvae of the Pacific tree frog.
On August 4,2004, the U.S. Fish and Wildlife Service announced the listing of the California Tiger
Salamander as threatened throughout its range, with the exception ofthe Sonoma and Santa Barbara
County populations which are currently listed as endangered (USFWS 2005). On August 23, 2005,
the Service designated 199,109 acres of critical habitat inl9 counties for the Central California
population of the California tiger salamander. On August 2,2005, they proposed 74,223 acres of
critical habitat for the Sonoma population. This habitat is located in the Santa Rosa Plain in central
Sonoma, and includes lands bordered on the west by Laguna de Santa Rosa, to the south by Skillman
Road northwest of Petaluma, to the east by foothills, and to the north by Windsor Creek. In
addition, a recovery plan for the Sonoma population is currently under development.
The annual grassland habitat on the Property is considered potentially suitable aestivation habitat for
the California tiger salamander. There are multiple occurrences ofCTS in the immediate vicinity of
the Property. California ground squirrel burrows that could serve as aestivation habitat were found
within the annual grassland habitat. In 1998, CTS larvae were documented at a stock pond located
1.4 miles south of the Property. An adult CTS was documented immediately west of Tassajara
Creek in 1997, at a location that is 0.6 miles north ofthe County Rehabilitation Center, at a distance
of 1.4 miles southwest ofthe Property. In 2000, CTS were documented at a stock pond located 0.7
miles east of Tassajara Road and 0.7 miles south of the Alameda/Contra Costa County line, 0.71
miles southeast of the Property. This species was not observed during the 2006 survey.
REPTILES
Southwestern Pond Turtle (Clemmvs marmorata fJallida). California Species of Concern.
17
The southwestern pond turtle is a thoroughly aquatic turtle that may be found in marshes, ponds,
streams and irrigation ditches where aquatic vegetation is present. The turtles require basking sites
and suitable upland habitat for egg laying. Suitable breeding upland habitats may consist of sandy
banks or grassy open fields. The southwestern pond turtle is a smaller relative to the western pond
turtle. Southwestern pond turtles have been observed within Tassajara Creek in pool habitat
occurring approximately 0.75 miles south of the Property. Habitat for the southwestern pond turtle is
present in the stretch of Tassajara Creek that runs immediately west of the Property. The site
contains suitable upland habitat for nesting; habitat adjacent to the site contains permanent water in
which the turtle may forage. Specific surveys for southwestern pond turtles were not conducted on
the Property; however, none were observed during reconnaissance level surveys. This species was
not observed during the 2006 survey.
Alameda Whipsnake (MasticofJhis lateralis eurvxanthus). Federal Threatened Species.
The Alameda whipsnake is one of two subspecies ofthe California whipsnake, distinguished from
the chaparral whip snake (M l. lateralis) by the broad orange striping on its sides. Adults reach
approximately 3 to 5 feet in length and show a sooty black to dark brown back, cream colored
undersides and pinkish tail. This species is typically found in chapparal, northern coastal sage scrub,
and coastal sage habitats, however annual grasslands, oak woodlands, and oak savannah serve as
habitat during the breeding season. Egg-laying occurs near scrub habitat, on ungrazed grasslands
with scattered shrub cover. The known distribution for Alameda whipsnake includes Sobrante
Ridge, Oakaland Hills, Mount Diablo, the Black Hills, and Wauhab Ridge.
The Property occurs immediately east of Proposed Critical Habitat for the Alameda whipsnake.
There is a single occurrence of the Alameda whipsnake documented in 1996 at an unknown location
within the Dublin quadrangle. Habitat documented at the location of the sighting was described as
brush scrub and annual grassland habitat. There is no scrub habitat suitable for the Alameda
whipsnake at the Property. Due to the barriers to movement between known habitat for the snake,
and a lack of occurrences in the vicinity of the Property, the Alameda whipsnake is considered
unlikely to occur on the Property. This species was not observed during the 2006 survey.
BIRDS
Golden Eat!le (Aquila chrvsaetos). California Species of Concern.
The golden eagle is typically found in open grasslands, pastures, oak woodland, often near lakes and
rivers. Golden eagles have been observed foraging within the rolling grassland habitat occurring
immediately east of the Property (multiple sightings in 2004). Nesting habitat includes, isolated
ledges and tall trees. Threats include human disturbance, loss of habitat, shooting, lead poisoning
and electrocution from power lines. Grasslands on the Property are considered potentially suitable
foraging habitat for the golden eagle, but this species is not expected to nest on the site. The golden
eagle has been observed in grassland habitat immediately east of Tassajara Road, east of the
Property. The golden eagle was not observed during surveys of the site.
Red-Tailed Hawk (Buteo iamaicensis). State Protected
18
The red-tailed hawk is a large Buteo that is distinct due to the red color ofthe tail feathers in contrast
to the brown color of the main body. Not all red-tail hawks exhibit this coloration on their tail and
gradations may occur especially in young birds. Red-tailed hawks hunt rodents by soaring over
grassland habitat. Nest trees for red-tailed hawks are usually tall trees with a well developed canopy
that include a strong branching structure on which to build a nest. Red-tailed hawks find ample
foraging and nesting habitat in the annual grassland and oak savanna habitat throughout all of the
development sites. Suitable nest trees occur on the in the oak woodland and riparian area on the
Property. A red tailed hawk was observed to forage over the site during the reconnaissance site
visit, but no evidence of current nesting was detected.
Red-Shouldered Hawk (Buteo lineatus). State Protected.
The red-shouldered hawk is a medium-sized, slender Buteo with long legs and a long tail and is
smaller than the red-tailed hawk. Upperparts are dark with pale spotting, and rusty-reddish feathers
on the wing create the distinctive shoulder patch. The tail has several wide, dark bars; the
intervening narrow stripes and the tip ofthe tail are white, and there is variation in the number of tail
bars among adults and juveniles. The habitat that the red-shouldered hawk prefers varies from
bottomland hardwoods and riparian areas to upland deciduous or mixed deciduous-conifer forest,
and almost always includes some form of water, such as a swamp, marsh, river, or pond. In the
west, sometimes the red-shouldered hawk occurs in coniferous forests, and it has been expanding
range of occupied habitats to include various woodlands, including stands of eucalyptus trees amid
urban sprawl. The riparian habitat associated with Tassajara Creek is considered potentially suitable
foraging and nesting habitat for the red-shouldered hawk. This species was not observed during the
reconnaissance survey, but has been observed within the Tassajara Creek corridor and is considered
likely to occur within the site. .
Northern Harrier (Cicus cvaneus). California Species of Concern.
Northern harriers require open annual grassland habitats and prefer dense ground vegetation or
grasses in which to build nests. They are distinguished from other similar species by their prominent
white rump patch. Males are pale gray in color while females are brown with dark streaking on the
breast. These birds are ground nesters and utilize habitats ranging from annual grassland to seasonal
wetland for this purpose. The grassland habitat at the Property is considered suitable foraging
habitat for the northern harrier. It is not considered suitable to support nesting northern harriers
because,
due to grazing of most of the site, the vegetation is sparse and does not provide sufficient cover for
nesting sites. This species was not observed during the 2006 survey.
19
American Kestrel (Falco sfJarverius). State Protected.
. The American kestrel is the smallest of raptor species and is distinct due to its diminutive size and
the barring on its head. The female kestrel is slightly larger than the male bird and is differentiated
by its brown and red coloration. The male kestrel is slightly smaller than the female and has grey
wing patches near the top of the wing. Kestrels utilize cavities in trees for nesting and hunt small
rodents and sometimes small birds. Annual grasslands on the Property are considered potentially
suitable foraging habitat for this species. Nesting areas would be available in the trees along the
Tassajara Creek corridor or in the oak woodland located on the hillsides. American kestrels were
not observed on the site during the reconnaissance survey.
Cooper's Hawk (AccifJiter coofJerii). State Protected
Cooper's hawks are medium sized raptors that exhibit the same coloration in both males and
females. Differences do occur between the sexes but is limited to sizing as the females are much
larger than the males. These hawks are broad-winged and long-tailed. They have a short, dark,
hooked beak and short, rounded wings. The very long tail of the Cooper's hawk is rounded at tip.
These birds often fly with several quick wing beats and a short glide, but also soar. The large
angular head projects far beyond wings when soaring. The back and upper wing coloration of the
Cooper's hawk is blue-gray while the breast, belly and underwing coverts are white and marked by
fine, thin, reddish bars. The habitat in which the Cooper's hawk is found consists of woodlands and
riparian areas where small birds occur, the. main prey base for these raptors. The riparian habitat on
the Property is suitable for this raptor species, but no Cooper's hawks were observed during any
survey.
Sharp-Shinned Hawk (AccifJiter striatus). State Protected.
The sharp-shinned hawk is a small raptor with short, rounded wings. This hawk has a long tail that
is squared-off at tip with prominent comers. This raptor typically flies with several quick, snappy
wing beats and a short glide, but also soars. Its small rounded head does not project far beyond
wings when soaring. The adult sharp-shinned hawk exhibits a red eye, black cap, and a blue-gray
back and upper wings. The white breast, belly and under wing coverts are marked by fine, thin,
reddish bars. This species hunts in woodlands, riparian areas and even densely vegetated urban
areas. These raptors capture small birds, rodents and reptiles. Often they hunt along the edges of
woodlands, shorelines, and riparian habitats where migrating passerines are found. Nesting habitat
for these raptors consists of woodlands, coniferous forest, and dense oak woodland adjacent or close
to open areas. The riparian woodland habitat is considered potentially suitable foraging and nesting
habitat for the sharp-shinned hawk, but this species was not observed during visits to the site.
White-Tailed Kite (Elan us caeruleus). Federal Species of Concern, CDFG: Fully Protected
The white-tailed kite is falcon-shaped with a long white tail. This raptor has black patches on the
20
shoulders that are highly visible while the bird is flying or perching. White-tailed kites forage in
annual grasslands, farmlands, orchards, chaparral, and at the edges of marshes and meadows. They
are found nesting in trees and shrubs such as willows (Salix sp.), California sycamore (Platanus
racemosa), and live oak (Quercus agrifolia) often near marshes, lakes, rivers, or ponds. This raptor
often hovers while inspecting the ground below for prey. The annual grasslands are considered
potentially suitable foraging habitat for white-tailed kites, while small trees and shrubs throughout
the Property could potentially serve as nesting habitat. White-tailed kites were not observed during
surveys of the site.
Burrowint! Owl (Athene cunicularia). California Species of Special Concern.
The U.S. Fish and Wildlife Service has identified the burrowing owl is as a "candidate" species.
Candidate species are animals and plants that may warrant official listing as threatened or
endangered, but there is no conclusive data to give them this protection at the present time. As a
candidate species, burrowing owls receive no legal protection under the Endangered Species Act
(ESA). However, this species does receive some legal protection from the U.S. through the
Migratory Bird Treaty Act, which forbids the destruction ofthe birds and active nests. In California,
the burrowing owl considered a "species of special concern."
Burrowing owls are ground dwelling members ofthe owl family and are small brown to tan colored
birds with bold spots and barring. Burrowing owls generally require open annual grassland habitats
in which to nest, but can be found on abandoned lots, roads, airports, and. other urban areas.
Burrowing owls generally use abandoned California ground squirrel (Spermophilus beecheyi) holes
for their nesting burrow, but are also known to use pipes or other debris for nesting purposes.
Burrowing owls prefer annual grassland habitats with low vegetative cover. The breeding season for
burrowing owls occurs from March through August. Burrowing owls often nest in loose colonies
about 100 yards apart. They lay 3 to 12 eggs from mid-May to early June. The female incubates the
clutch for about 28 days, while the male provides her with food. The young owls begin appearing at
the burrow's entrance two weeks after hatching and leave the nest to hunt for insects on their own
after about 45 days. The chicks can fly well at 6 weeks old.
Close investigation ofthe annual grassland habitat within the site detected unsuitable nesting habitat
and marginal foraging habitat for this species. No burrows or burrowing mammals were observed
during the survey where a burrowing owl could establish a nest site. No burrowing owls or
secondary evidence of their presence was detected within the Property boundaries during the
reconnaissance survey. Burrowing owls are presumed absent from the Property at this time.
MAMMALS
San Joaquin Kit Fox (VulfJes macrotis mutica). Federally Endant!ered, State Threatened.
21
The San Joaquin kit fox (SJKF) has a slim body with large, conspicuous ears, and a long, bushy,
black tipped tail. It is the smallest canid species in North America. The SJKF lives in annual
grassland habitats where friable soils are present in which they may excavate den sites. The general
habitat requirement for the kit fox is annual grasslands or grassy open habitat stages with scattered
shrubby vegetation. Food requirements for the SJKF are rodents, insects, and even garbage in
urbanized areas. Grassland habitats with a large rodent prey base and loose textured soils are
thought to provide the best habitat for the SJKF.
The Property falls within the known historical range of the SJKF. There have been 2 recent
occurrences of the kit fox in the vicinity of the Property. The most recent observation was on
August 20,2002 (Occurrence #58), where I adult was observed 7 miles northeast of Livermore, 0.6
miles directly east of Brushy Peak, at a distance of approximately 10.2 miles east of the Property.
The annual grassland habitat on the Property is considered suitable habitat for the SJKF due to the
friable soils, access to migratory corridors, abundance of rodents, and nearby source of freshwater in
Sand Creek. This species was not encountered during the reconnaissance survey.
7.0 CONCLUSIONS
7.1 Special-Status Plants
The non-native annual grassland and oak woodland habitats on the development site consist of
common habitat types that generally lack the special micro requirements that would support the
majority of the special-status plants identified by the data bases. Special-status plants tend to be
those species that are limited in their occurrence to a specific niche, such as provided by the
chemical properties found in serpentine, the sand dunes, chaparral, or other coastal habitats. Based
on a review of information contained in the CNDDB, habitat types were identified which could
potentially SUJport heartscale, hairless popcorn flower, brittlescale, San Joaquin spearscale, palmate-
bracted bird's-beak, Congdon's tarplant, diable helianthella, saline clover and caper-fruited
tropidocarpum. Focused plant surveys performed in June and August were conducted during the
appropriate blooming period for all but two ofthe plant species (diable helianthella and caper-fruited
tropidocarpum). No special-status plants were observed on the Property. Both the diable helianthella
and caper-fruited tropidocarpum require alkali soils which were not observed on the Property. The
lack of alkali :;oils would greatly reduce the potential for these plants to occur on the subject Property.
7.2 Special-Status Wildlife
Foraging or Nesting Raptor Species - The entire development site is suitable for raptor species
due to the laq:e acreage of grassland, woodland, and riparian habitat on and surrounding the subject
Property. Tl:e red-tailed hawk, red-shouldered hawk, American kestrel, Cooper's hawk, sharp-
shinned hawk, and white-tailed kite could find nesting and foraging opportunities on or adjacent to
the Property based on the presence of the specific habitat types identified for these species. The
golden eagle and northern harrier could potentially forage on the site. A red-tailed hawk that was
exhibiting telritorial behavior typical of nesting birds. However, no nests were identified on or
directly adjacent to the Property during spring/summer surveys. A grove of eucalyptus trees is also
22
located immediately south ofthe Property in the non-native grassland habitat. No raptor nests were
found in the canopy ofthe eucalyptus trees at the time ofthe surveys. The Department ofFish and
Game normally imposes a setback from all active raptor nest trees. The eucalyptus trees are in close
enough proximity to the Property that a setback buffer would encroach onto the Property.
Special Status Reptiles and Amphibians - The California red-legged frog, California tiger
salamander and the southwestern pond turtle may find suitable habitat within the Property. The
habitat within the Tassajara Creek corridor is considered to be suitable habitat to support the
California red-legged frogs and the southwestern pond turtle. Annual grassland habitat located
within the Property may support the California tiger salamander. Given that these species have been
recorded in the vicinity of the Property it is likely that that they occur on site.
Special-Status Mammals - The annual grassland habitat within the Property could be utilized by
the San Joaquin kit fox.
8.0 RECOMMENDA nONS
. Proposed activities on the Property may result in vegetation removals that could directly
destroy nests, eggs and immature birds, and would remove future nesting habitat for birds,
including sensitive species such as migrating songbirds. If impacts to onsite trees cannot be
avoided, then the removal of these trees should occur outside the breeding season, which is
typically between January and July.
. Pre-construction surveys for nesting raptors would be necessary due to the presence of
suitable nesting trees on and adjacent to the Property. The tall redwood tree and the oak
trees on the site represent potential nesting habitat for raptors and should be surveyed if
removal of the trees is to occur after January and prior to July. Raptor surveys are also
recommended if grading is to occur within a I OO-foot distance of any known nesting site. If
required, surveys should be performed prior to January to identify and potential nesting trees
prior to the birds laying eggs. Once eggs have been laid, a buffer must be established around
the nest site and the site protected until August I or until the young have fledged.
. Several special-status plant species have been identified as having the potentially to occur on
the Property based on occurrence of appropriate habitat types. The CDFG requires a IO-day
notification period prior to any grading or earthworks that will impact a listed plant species.
Therefore, it is recommended that prior to construction a survey be performed to document
absence/presence of any special-status plant species. Staking of rare plants on site would be
required so that salvage of said plant material could be accomplished by CDFG.
. Habitat on and adjacent to the Property may be suitable to support the California red-legged
frog and the California tiger salamander. Potentially suitable habitat for California red-
legged frogs has been documented to occur within Tassajara Creek and its tributaries. Pre-
construction surveys should be conducted no more than 3-days prior to construction to
determine absence/presence within the construction area. Implementation of appropriate
23
mitigation measures would ensure that impacts to red-legged frog, and California tiger
salamander would be avoided or minimized. Mitigation measures may include set back
buffers from the riparian corridor, limits on construction timing, onsite construction
monitoring, and installation of silt fencing along the project and habitat interface. These
measures should be determined through consultation with the Department ofFish and Game
and Fish and the U.S. Fish and Wildlife Service.
. Potentially suitable habitat for the southwestern pond turtle has been identified within the
Tassajara Creek corridor. If construction is to occur within the creek corridor or within 50
feet of the channel, a pre-construction survey should be conducted for the turtles to locate
their positions. If possible, any southwestern pond turtles identified in the construction area
should be moved prior to commencement of construction activity.
. Potentially suitable habitat for the San Joaquin kit fox has been identified within the annual
grassland habitat on the Property. If vegetation clearing or construction is to occur within
the annual grassland habitat, a pre-construction survey should be conducted to determine if
the kit fox is present.
. It is recommended that a formal jurisdictional delineation be conducted in accordance with
U.S. Army Corps of Engineers guidelines. This delineation would determine the boundaries
of the creek feature and potential seasonal wetlands, and determine if any ofthe features are
under the jurisdiction of the Corps or Regional Water Quality Control Board. If these
features are determined to be jurisdictional, permit applications must be filed with the Corps
CDFG, and Regional Water Quality Control Board prior to any work.
. Grading and excavation activities could expose soil to increased rates of erosion during
Property construction periods. During construction, runoff from the proposed Property could
adversely affect any aquatic life that may be in the potential seasonal wetland on the
Property. Surface water runoff could remove particles of fill or excavated soil from the site,
or could erode soil down-gradient, if the flow were not controlled. Deposition of eroded
material in the wetland could increase turbidity, thereby endangering aquatic life.
Implementation of appropriate mitigation measures would ensure that impacts to aquatic
organisms would be avoided or minimized. Mitigation measures may include best
management practices (BMP's) such as hay bales, silt fencing, placement of straw mulch,
and hydro seeding of exposed soils after construction as identified in the Storm Water
Pollution Prevention Plan (SWPPP).
. Additional surveys for burrowing owl, a CDFG species of concern, may be necessary on the
site to determine presence or absence ofthis species ifthe site is left fallow for an extended
period of time. If present, nest exclusion doors or avoidance buffers may be used as
negotiated with CDFG. No disturbance should occur within 50 m (approx. 160 ft.) of
occupied burrows during the non-breeding season of September I through January 31 or
within 75 m (approx. 250 ft.) during the breeding season of February 1 through August 31.
Avoidance also requires that a minimum of 6.5 acres of foraging habitat be preserved
24
contiguous with occupied burrow sites for each pair of breeding burrowing owls (with or
without dependent young) or single unpaired resident bird.
25
9.0 LITERATURE CITED
California Department ofFish and Game Natural Diversity DataBase, computer listings and map
locations of historic and current recorded occurrences of special-status species and natural
communities of special concern for USGS 7.5 minute quadrangle maps: Livermore and Dublin.
June 2006.
CDFG 2006. California Wildlife Habitat Relationships. http://www.dfg.ca.gov/whdab/index.html
California Department ofFish and Game. 2006. Special animals. http://w\v.dfg.ca.gov/endangcrcd/
special_ animals.html.
. 2006. State and federally listed Endangered, Threatened, and Rare plants of California.
http://www.dfg.ca. gov / endangered/t_ eplnt. pdf.
. 2006. State and federally listed Endangered and Threatened animals of California.
http://www.dfg.ca.gov!endangcrcd!t c animal.pdf.
California Native Plant Society (CNPS). 2006. Inventory of Rare and Endangered Plants (online
edition, v6-04dl). California Native Plant Society. Sacramento, CA. Accessed on Dec., 15:12:16
from http://www.cnps.org/inventory
Ehrlich, P.R., D.S. Dobkin, and D. Wheye. 1988. The Birder's Handbook: a field guide to the
natural history of North American birds. Simon & Schuster, Inc., New York. 785 pp.
Hickman, J. C. (ed.). 1993. The Jepson manual: higher plants of California. University of California
Press, Berkeley, CA. 1400 pp.
Holland (1986) Preliminary Description of the Natural Communities of California. CDFG.
Mayer, K. E. and Laudenslayer W.F. 1988. A Guide to Wildlife Habitats of California. California
Pierce, Robert J. 1995. Wetland Delineation Lecture Notes. Wetland Training Institute, Inc.,
Poolesville, MD. WTI 95-2. 200pp.
Sawyer and Keeler-Wolf. 1995. A Manual of California Vegetation. California Native Plant
Society.
Skinner, M. W. and B. M. Pavlik (eds.). 1994. Inventory ofrare and endangered vascular plants of
California. California Native Plant Society Special Publication No.1 (5th edition). California Native
Plant Society, Sacramento, CA. 338 pp.
Sibley, D.A. 2000. The Sibley Guide to Birds. Alfred Knopf, New York.
26
Sibley, e.G., and B.L. Munroe, Jr. 1990. Distribution and taxonomy of birds of the world. Yale
University Press, New Haven and London. 1111 pp.
U.S. Fish and Wildlife Service, Resource Management Group, Inc. 1993. National List of Plant
Species that Occur in Wetlands. Region IO-California.
U.S. Fish and Wildlife Service. 2005. Recovery Plan for the Tidewater Goby (Eucyclogobius
newberryi). U.S. Fish and Wildlife Service, Portland, Oregon. vi + 199 pp.
United States Fish and Wildlife Service. 2006a. Endangered and threatened plants.
http://www.fws.gov/r9endspp/cfrl712.pdf.
. 2006b. Endangered and threatened wildlife and plants; review of plant and animal
taxa that are Candidates or Proposed for listing as Endangered or Threatened; annual notice of
findings on recycled petitions; annual description of progress on listing actions; proposed rule.
Federal Register 64(205): 57534-57547.
. 2006c. Endangered and threatened wildlife. http://www.fws.gov/
rgendspp/cfrI711.pdf (31 December 2002).
. USFWS 2006. Endangered Plants
http://sacramento.hvs.gOv!es/plantsppaccts!legenere.htm
27
ATTACHMENTS
Figure No.1
Figure No.2
Figure No.3
Figure No.4
Figure No.5
ATTACHMENT NO.1
FIGURES
Regional Map
Vicinity Map
USGS Quadrangle Map for Livermore
Aerial Photograph
CNDDB Locations of Special-Status
Plants and Animals
Figure No.1
Regional Map
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Strut Atl;l~ USA,!} 2005
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Phone: (925) 825-2111
Figure I
Regional Map of the
Vargas/I<redrick I'roperty
Dublin, Califomia
This document is not intcnded for detail desi n work.
Figure No.2
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Phone: (925) 825-2111
Figure 2
Vicinity Map of the
Vargas/Fredrick Property
Dublin, California
This document is not intended for detail desi n work.
Figure No.3
USGS Quadrangle Map
for Livermore
~" .. ...
Olberding Environmental, Inc.
1390 Willow Pass Road, Suite 370
Concord, CA 94520
Phone: (925) 825-2111
Figurc 3
USGS Quadranglc Map of thc
Vargas/Frcdrick Propcrty
Livcrmorc Quadrangle
Dublin, California
This document is not intended for detail design work.
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Figure No.4
Aerial Photograph
Olbcrding Environlllcntal, Inc.
] 390 Willow Pass Road, Suitc 370
Concord, CA 94520
Phonc: (925) 825-2] 1 ]
Figure 4
Aerial Photograph of the
Vargas/Fredrick Property
Dublin, California
This document is not intendcd for detail design work.
Figure No.5
CNDDB Locations of Special-Status Plants and Animals
lnro: Site aV<lUAble 0'.11 hMp:l/lmaps..Jlg.ca.gov
Olbcrding Environlllcntal, Inc.
1390 Willow Pass Road, Suite 370
Concord, CA 94520
Phone: (925) 825-2111
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Figurc 5
CNDDB Locations of Spccial Status
Plants and Animals
Vargas/Frederick Property, California
This documcnt is not intended for detail desi n work.
ATTACHMENT NO.2
TABLES
Table No. 1
Plant and Animal Species Observed
Table 1
Plant and Animal Species Observed
~ 3 Scientific Nam.e ....... \))./ Nlime ..s
... ........
Achillea mille{olium Yarrow
Avena barbata Slender oat
Avena fatua Wild oat
Baccharis pilularis Coyote brush
Brassica ni5<ra Black mustard
Bromus carinatus California brome
Bromus diandrus Rip-gut brome
Bromus hordeaceous Soft chess
Bromus madritensis sso. rubens Foxtail chess
Bromus stamineus Brome
Carduus pvchnocelphalus Italian thistle
Centarea solstitialis Yellow starthistIe
Clavtonia perfoliata Miner's lettuce
Dichelostemma capitatum Blue dicks
Elvmus f;laucus Blue wild rye
Erodium cicutarium Red-stemmed filaree
Erodium moschatum White-stemmed filaree
Geranium dissectum Cut-leaf geranium
Geranium molle Dove geranium
Hordeum marinum var. f!ussoneanum Mediterranean barley
Hordeum murinum var. levorinum Foxtail
Lolium multiflorum Italian rye grass
Lotus scoparius Deer weed
Lotus vurshianus Blue luoine
Malva parviflora Cheeseweed
Medica5<o polymorpha Burclover
Mimulus aurantiacus Sticky monkey flower
Oxalis albicans Oxalis
Picris echiodes Prickly oxtongue
Quercus awi(olia Coast live oak
Urtica dioica Stinging nettle
Ravhanus sativa Wild radish
Rubus discolor Himalavan blackberry
Rubus ursinus California blackberry
Rumex acetosella Sheep sorrel
Rumex crisp us Curly dock
Salix lasiolepis Arroyo willow
Sisvrichium bellum Blue-eyed grass
Table 1
Plant and Animal Species Observed
, M', ," ....~T.i.....',.;">. ,..iX/')!.n...)!> iJi ..'....,, .. Name ---. T
,
Toxicodendron diversilobum Poison oak
Animal Species Observed
Birds
Af!elaius phoeniceus Red-winged blackbird
Buteo ;amaicensis Red-tailed hawk
Callipepla californica California quail
CalYTJte anna Anna's hummingbird
Cathartes aura Turkey vulture
Colaptes auratus Northern flicker
Corvus brachyrhynchos American Crow
Eupha)!Us cyanocephalus Brewer's blackbird
Junco hyemalis Dark-eyed junco
Melanerpes formicivorous Acorn woodpecker
Parus inornatus . Plain titmouse
Parus rufescens Chestnut-backed chickadee
Pipilo crissalis California towhee
Pipilo maculatus Spotted towhee
Poecile rufescens Chestnut-backed chickadee
Psaltriparus minimus Bushtit
Sayornis nif(ricans Black phoebe
Sialia mexicana Western bluebird
Sturnus vulf(aris European starling
Sutta carolinensis White-breasted nuthatch
Zenaida macroura Mourning dove
Zonotrichia leucophrys White-crowned sparrow
Mammals
Spermophilus beecheyi California ground squirrel
Table No.2
Special-Status Species for the Livermore and Dublin
7.5 Minute Quadrangle Maps
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ATTACHMENT NO.3
SITE PHOTOGRAPHS
~""
Photo No. I. Grazed grassland habitat. Tbe hill with non-native grassland babitat appears in tbe baekgronnd.
View fadn south.
Photo No.2. Western bO~lIIdary of the Property with non-native grassland habitat and valley oak woodland
habitat alon Tassa 'ara Creek channel in the back round. View fadn west.
Olberding Environmental, Inc.
Var as/FrederickPro erty- J nne 2006
Photo No. 3.Dirt access road into the Property. View facing west fl'OlIInear the center of the Property with
lotential wetland identified b the arrow.
}.i
11
i1
Photo No.4.
Olberding Environmental, Inc.
Var as/Frederick Pro ert - June 2006
Appendix B:
Tree Report
Initial Study/Mitigated Negative Declaration for the Vargas Project
City of Dublin
March 2007
TREE REPORT
V argas/F red rich property
Dublin, CA
PREPARED FOR:
Sun Valley Land Development
4471 Stoneridge Dr., Suite B
Pleasanton, CA 94588
PREPARED BY:
HortScience, Inc.
4125 Mohr Ave., Suite F
Pleasanton CA 94566
August, 2006
. 4125 Mohr Ave., Suite F
Pleasanton CA 94566
9254840211
FAX: 9254845096
Tree Report
Vargas/Fredrich property
Dublin, CA
Table of Contents
Page
Introduction and Overview
1
1
2
3
6
7
Survey Methods
Description of Trees
Suitability for Preservation
Evaluation of Impacts and Recommendations
Appraisal of Value
Tree Preservation Guidelines
8
List of Tables
Table 1. Tree condition and frequency of occurrence
Table 2. Suitability for Preservation
Table 3. Trees recommended for removal
3
4
6
Table 4. Appraised value of trees recommended for preservation 8
Attachments
Tree Survey Map
Tree Survey Form
Sun Valley Land Development. August, 2006
Tree Report, Vargas/Fredrich property
HortScience, Inc.
Page 1
Introduction and Overview
Sun Valley Land Development is planning to develop the Vargas/Fredrich properties on
Camino Tassajara, in Dublin. Currently, the properties contain three single family
residences and several outbuildings. Tassajara creek borders the property to the south
and west. The proposed development would subdivide the property into 76 lots.
HortScience, Inc. was asked to prepare a Tree Report for the site for review by the City
of Dublin.
This report provides the following information:
1. An evaluation of the health and structural condition of the trees from a visual
inspection.
2. An evaluation of the impacts of the proposed development on the trees.
3. Recommendations for tree preservation and protection during construction.
4. The appraised value of trees recommended for preservation.
Survey Methods
Trees 6" in diameter and larger were surveyed on August 23,2006. The survey
procedure consisted of the following steps:
1. Identifying the tree as to species;
2. Tagging each tree with an identifying number and recording its location on a
map;
3. Measuring the trunk diameter at a point 54" above grade;
4. Evaluating the health and structural condition using a scale of 1 - 5:
5 - A healthy, vigorous tree, reasonably free of signs and symptoms of
disease, with good structure and form typical of the species.
4 - Tree with slight decline in vigor, small amount of twig dieback, minor
structural defects that could be corrected.
3 - Tree with moderate vigor, moderate twig and small branch dieback,
thinning of crown, poor leaf color, moderate structural defects that
might be mitigated with regular care.
2 - Tree in decline, epicormic growth, extensive dieback of medium to large
branches, significant structural defects that cannot be abated.
1 - Tree in severe decline, dieback of scaffold branches and/or trunk; most
of foliage from epicormics; extensive structural defects that cannot be
abated.
5. Rating the suitability for preservation as "good", "moderate" or "poor".
Suitability for preservation considers the health, age and structural condition
of the tree species, and its potential to remain an asset to the site for years
to come.
Good: Trees with good health and structural stability that have the
potential for longevity at the site.
Moderate: Trees with someWhat declining health and/or structural
defects than can be abated with treatment. The tree will
require more intense management and monitoring, and may
have shorter life span than those in 'good' category.
Poor: Trees in poor health or with significant structural defects that
cannot be mitigated. Tree is expected to continue to decline,
regardless of treatment. The species or individual tree may
have characteristics that are undesirable for landscapes, and
generally are unsuited for use areas.
Sun Valley Land Development. August, 2006
Tree Report, Vargas/Fredrich property
HortScience, Inc.
Page 2
Description of Trees
Thirty-eight (38) trees, representing 17 species, were assessed. Vegetation at the site
was highly diverse. Planted exotics surrounded the existing homes and outbuildings,
while large-diameter oaks were restricted to Tassajara creek.
Average tree condition was fair, with 17 trees, or 45% of the population. Sixteen (16)
trees (42%) were in good condition and 5 (13%) were poor (Table 1, following page).
Trees growing around the houses were landscape species, and included coast redwood,
mulberry and deodar cedar. Mulberry trees were in fair condition, having been topped.
Young coast redwoods were in fair to poor condition, suffering from varying degrees of
water stress.
Four (4) trees were surveyed on Camino Tassajara (#219-222), including two (2)
Lombardy poplars and two (2) olives. One (1) of the Lombardy poplars had been topped
for utility line clearance, while the olives both had trunks wounds with decay.
Three (3) mature valley oaks (#247-249) were growing on the eastern bank of Tassajara
creek. Trunks of the trees were down-slope from the existing graded area and all three
had branches that swept to the ground (Photo 1).
The City of Dublin defines several species, including valley oak, with trunk diameters of
24" or greater as "Heritage". By this definition, valley oak #248 was the only tree
surveyed which qualifiied as "Heritage". Removal of a "Heritage" tree requires a permit
issued by the City of Dublin Community Development Department.
Photo 1: Trees
#247-249 (R to
L) were growing
on the bank of
Tassajara creek.
Trunks were
down-slope from
the existing
graded area.
Appendix C:
Preliminary Geologic and Geotechnical Report
Initial Study/Mitigated Negative Declaration for the Vargas Project
City of Dublin
March 2007
ENGEO
INCORPORATED
GEOTECHNICAL
ENVIRONMENTAL
WATER RESOURCES
CONSTRUCTION SERVICES
Project No.
7431.1.001.01
July 14,2006
Mr. Fred Musser
Sun Valley Land Development
4471 Stoneridge Drive, Suite B
Pleasanton, CA 94568
Subject:
Fredrich and Vargas Properties
6960 and 7020 Tassajara Road
Dublin, California
PRELIMINARY GEOLOGIC AND GEOTECHNICAL FINDINGS
References: 1. ENGEO Inc.; Preliminary Geotechnical Field Exploration, The TVPOA
Planning Area, Contra Costa County, California; March 22, 1993; Project
No. 3283-W4.
2. ENGEO Inc.; Preliminary Geotechnical Exploration, Moller Ranch, Tassajara
Road, Alameda County, California; April 7, 2003; Project No. 5661.1.003.01.
Dear Mr. Musser:
At your request, we are providing preliminary geologic and geoteclmical findings based on our
site visit and field explorations for the subject site in Dublin, California.
The study area (APN 986-0004-002-0 I and 986-0004-002-03) is located west of Tassajara Road
and east of Tassajara Creek, near the Contra Costa County and Alameda County boundary line.
The site is approximately 12.9 acres in area. Based on available maps and aerial photos, the
current site consists of residential structures. The site contains a knoll near Tassajara Road with
side slopes draining toward the Tassajara Creek. The lowest elevation is approximately 465 feet
above mean sea level near the western property line at top of the creek bank, and the highest
elevation is approximately 530 feet at the knoll. Natural slope gradient is approximately 3:1
(horizontal: vertical).
Our work conducted to date has included the following: review of available literature, geologic
maps, and previous geotechnical repOlts pertinent to the site; drilling four exploratory borings
and eight test pits within the proposed properties, sampling and laboratory testing of subsurface
materials from the boreholes and test pits. In addition, black and white stereo-paired aerial
photographs were used for the purpose of observing natural landforms on the site. These
photographs were used to study geomorphic features, interpret the relationships between
landfonns and the underlying rock, soil, and geologic structures, and observe the presence,
character and activity of slope failures on or adjacent to the site. The findings of our boring and
test pit exploration were used in conjunction with the aerial photograph interpretation and
literature review to produce the geotechnical exploration report.
20]0 Crow Canyon Place' Suite 250 . San Ramon. CA 94583-4634 . (925) 866-9000 . Fax (888) 279-2698
www.engeo.com
Sun Valley Land Development
Fredrich and Vargas Properties
PRELIMINARY GEOLOGIC AND GEOTECHNICAL FINDINGS
7431.1.001.01
July 14, 2006
Page 2
According to the field exploration, fill material, approximately 2 to 5 feet thick, was encountered
at the top of the creek bank and at the entry to the site and consists of clayey sand and silty clay.
The native soil encountered at the site predominantly consists of silty clay to sandy clay
interbedded with very dense silty sand over bedrock. The clayey deposit is generally stiff to very
stiff consistency. Bedrock at the site consists of weathered claystone, siltstone and sandstone.
PRELIMINARY FINDINGS
Based on our site visit, available document and map research, aerial photograph interpretation,
and field exploration, we are providing the following preliminary findings.
Feasibility
· The proposed development is feasible from a geotechnical standpoint.
Geologic/Geotechnical Conditions
.. There are no known active faults traversing the site, and the property is not within an
Alquist-Priolo Earthquake Fault Zone.
· Strong ground shaking is anticipated at the site during the life of the project. This hazard is
common to all of the Bay Area.
· According to the regional landslide maps by Nilsen (1975) and Majmundar (1991), no
landslides were mapped within the site. In addition, no landslides were observed within the
site based on our stereo-paired aerial photographs interpretation and site reconnaissance.
· The risk from tsunamis or seiches is considered negligible at the site. Ground lurching is
possible at the site as in other locations in the Bay Area, but the offset or strain is expected to
be minor.
· Based on our exploratory data, the very fine-grained silty sand layers found III our test
borings are not considered to be liquefiable due to the dense consistency.
· The primary geologic consideration for the construction of the site is the stability of existing
and proposed slopes. Slope stability considerations can be addressed though proper grading
teclmiques, such as construction of drained keyways. Rough estimate for keyway excavation
volume is approximately 65,000 cubic yards. The amount for the keyway excavation is
estimated to be $260,000 based on a $4 per cubic yard basis.
Sun Valley Land Development
Fredrich and Vargas Properties
PRELIMINAR Y GEOLOGIC AND GEOTECHNICAL FINDINGS
7431.1.001.0 I
July 14,2006
Page 3
. According to the preliminary grading plan, some of the development area will belocated near
the top of bank of the Tassajara Creek. Based on our stereo-paired aerial photographs
interpretation and site reconnaissance, the existing creek banks appears to be incised and
eroded. Adequate setback distance between the creek banks and the on-site residential
dwellings and improvement should be provided.
. Site bedrock will be rippable with conventional heavy equipment. Local areas of partially
cemented rock may be encountered.
. Two small areas with unengineered fill, about 2 to 5 feet thick, were observed at the site. This
unengineered fill should be removed and recompacted.
. The site soils and bedrock materials have a high to critically high expansion potential
(Plasticity Index of 31 to 42). The effects of expansive soils can be reduced with a proper
combination of grading and foundation design techniques.
. Based on the preliminary grading concepts, laboratory test results, engineering analyses, and
experience in the region, the proposed engineered fills subject to future wetting can be
expected to exhibit settlement or swell. The magnitude of post-construction volume change is
depending on soil type, compaction effort, moisture content and fill thickness. Fill
compaction recommendations will be designed to reduce the swelling/settlement potential of
fills.
. Differential building movements due to differential till thickness, and the effect of significant
variations in materials in areas of cut and cut-fill transitions can be mitigated by localized
subexcavation and replacement by engineered fill.
. It is recommended that graded fill or cut slopes less than 8 feet in vertical height be no steeper
than 2:1 (horizontal:vertical). Graded cut or fill slopes 8 feet or greater should be constructed
at a slope gradient of 3: I.
We look forward to working with you on this project. If you have any questions regarding the
scope of our services, please do not hesitate to contact us.
Very truly yours,
ENGEO INCORPORATED
Reviewed by:
< f7f'
d. u
lllgs
(~
Y SOwn Munger
Appendix D:
Hydrologic Analysis
Initial Study/Mitigated Negative Declaration for the Vargas Project
City of Dublin
March 2007
Duggeri - .
I"Jensen -
.. I^ zar &.. Associates
:n .:jt.'Ie1It.'I::I:t:J,......:I..1..,1l"1..~h~...tll:l'J:l...I.j...'tI
..
Jab Na. 061037
September 29,2006
Mark Lander, City Engineer
City .of Dublin
100 Civic Plaza
Dublin, CA 84568
RE: Vargas/Fredrich Praperty
Dear Mr. Musser:
Sunumuized belaw are the preliminary findings .of .our hydrologic analysis for the praposed
residential redevelopment .of the subject property. Alsa enclosed is the preliminary
hydrology/drainage exhibit and calcula.tions. .
A. Hydrology
The praject site currently drains to T assajara Creek either by overland flaw.or via a road-side
swale along Tassajara Raad. It is a relatively small site with steep-slope& in claseproximity to
the creek. Based pn the aerial topography, th<.!re are a few existing small buildings, a pool,
two access drives ta Tassajara Road and a knallwith a house ol~:thetap. Graund caver
cansists of only a few trees spread aut aver the site. .
The trend ib. palicy far discharge is not ta allaw an increase in discharge rate fram
predevelopment candition ta past develapment canditi.on. Based on the existing condition
.of mastly bare graund and the proposed density of development, a detention basin with a. -
minimum starage volume of approximately I! 4 acre-feet will be needed'ta stare the
incre~ental runaff generated fram the proposed development. Due to the existing and
proposed grades, the site layaut, :j-nd the required depth of the starm drain, a detentian pond
does riot appear practical. Inst~ad, we prapase to up size about 800 lineal feet .of storm drain
pipe ta 54" ta detail? the 10and 100 year starms and meter them o_ut to the starm drain
system in Tassajara R.oad. This will attenuate the flaw to pre-develaped run.off rates.
The .on-site .starm drainageassaciated with directly cannected imperviaus areas will need to
be treated by Best Management Practices (EMP's) prior to being discharged into the storm
dr,;iln system in Tassajara Road as required by Alameda County C3' requirements. This can
be largely accomplished with the use .of grassy swales along the single laadedstreets and
bubble up inlets in the front yards .of the lats. The double loaded streets can utilize a
RECEIVED
4690 ChabatDrive, Suite 200 . Pleasantan CA 94588 . Phane (925)227-9100 . Fax (925) 22700<)01 1 2006,
OUBLIN PLft,.....ING
mechanical means of treatment such as a CDS media @ter or another City of Dublin
approved device.
Very truly yours,
Ruggeri-]ensen-Azar & Associates
/
~--'""."- --.'
Mark Falgout, PE
Enclosure
4690 Chabot Drive, Suite 200 . Pleasanton CA 94588 . Phone (92Q) 227-9100 . Fax (925) 227-9300
JOB NO:
JOB NAME:
DATE:
PREPARED BY:
SHEET NO.
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Phone (408) 848-0300
FAX (408) 848-0302
o Pleasanton
Phone (925) 227-9100
FAX (925) 227-9300
o Walnut Creek
Phone (925) 935-7710
FAX (925) 935-7763
Table of Contents
V ARGAS_PRELIM_pipe _ storage.gpw
Friday, Sep 29 2006, 11: 13 AM
Hydraflow Hydrographs by Intelisolve
Hydrograph Return Period Recap ...................................................................... 1
1 - Year
Hydrog raph Reports ........................................................................................................... 2
Hydrograph No.1, SCS Runoff, EX RUNOFF .................................................................. 2
Hydrograph No.2, SCS Runoff, PROPOSED .................................................................. 3
Hydrograph No.3, Reservoir, Pipe Storage ..................................................................... 4
Pond Report................................................................................................................. 5
10 - Year
Hyd rograph Reports ........................................................................................................... 6
Hydrograph No.1, SCS Runoff, EX RUNOFF .................................................................. 6
Hydrograph No.2, SCS Runoff, PROPOSED .................................................................. 7
Hydrograph No.3, Reservoir, Pipe Storage ..................................................................... 8
Pond Report................................................................................................................. 9
100 - Year
Hydrograph Reports ......... ................................ .... .......... ............ ... ........ .......... ........ ......... 10
Hydrograph No.1, SCS Runoff, EX RUNOFF ................................................................ 10
Hydrograph No.2, SCS Runoff, PROPOSED ................................................................ 11
Hydrograph No.3, Reservoir, Pipe Storage.... ..... .... ...................................................... 12
Pond Report............................................................................................................... 13
1
Hydrograph Return Period Recap
Hyd. Hydrograph Inflow Peak Outflow (cfs) Hydrograph
, No. type Hyd(s) description
(origin) 1-Yr 2-Yr 3-Yr 5-Yr 10-Yr 25-Yr 50-Yr 100-Yr
I 1 SCS Runoff ~------ 0.00 ------- ------- ------- 2.81 ------- ------- 6.47 EX RUNOFF
2 SCS Runoff ---.--- 0.01 ------- ------- ------- 6.33 ------- ------- 10.72 PROPOSED
I 3 Reservoir 2 0.00 ------- --._--- ------- 2.80 ------- ------- 6.31 Pipe Storage
I
I
I
I
I
I
I
I
I
,
I
I
,
:
,
I Proj. file: VARGAS_PRELlM_pipe_storage.gpw Friday, Sep 29 2006, 11 :13 AM
Hydraftow Hydrographs by Intelisolve
Hydrograph Plot
2
Hydraflow Hydrographs by Intelisolve
Friday, Sep 29 2006,11:13 AM
Hyd. No. 1
EX RUNOFF
Hydrograph type = SCS Runoff
Storm frequency = 1 yrs
Drainage area = 6.200 ac
Basin Slope = 0.0%
T c method = TR55
Total precip. = 0.33 in
Storm duration = 24 hrs
Peak discharge = 0.00 cfs
Time interval = 6 min
Curve number = 80
Hydraulic length = 0 ft
Time of cone. (Tc) = 16.00 min
Distribution = Type I
Shape factor = 484
Hydrograph Volume = 0 cuft
Q (cfs)
0.10
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.02
0.01
0.00
0
EX RUNOFF
Hyd. No.1 -- 1 Yr
29
58
87
116
145
174
203
232
Q (cfs)
0.10
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.02
0.01
0.00
261 290
Time (hrs)
- HydNo.1
Hydrograph Plot
3
Hydraflow Hydrographs by Intelisolve
Friday. Sep 29 2006,11:13 AM
Hyd. No. 2
PROPOSED
Hydrograph type = SCS Runoff
Storm frequency = 1 yrs
Drainage area = 6.220 ac
Basin Slope = 0.0%
T c method = USER
Total precip. = 0.33 in
Storm duration = 24 hrs
Peak discharge = 0.01 cfs
Time interval = 6 min
Curve number = 92
Hydraulic length = 0 ft
Time of cone. (Tc) = 10.00 min
Distribution = Type I
Shape factor = 484
Q (cfs)
0.10
Hydrograph Volume = 503 cult
PROPOSED
Hyd. NO.2 -- 1 Yr
0.09
-1--- -
I( -
\
0.08
0.07
0.06
0.05
0.04
0.03
0.02
0.01
0.00
0.00
26
Time (hrs)
o
2
4
6
8
10
12
14
16
18
20
22
24
- HydNo.2
Q (cfs)
0.10
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.02
0.01
Hydrograph Plot
4
Hydraflow Hydrographs by Intelisolve
Hyd. No. 3
Pipe Storage
Hydrograph type
Storm frequency
Inflow hyd. No.
Reservoir name
= Reservoir
= 1 yrs
= 2
= Pipe Storage
Friday, Sep 29 2006,11:13 AM
Peak discharge
Time interval
Max. Elevation
Max. Storage
= 0.00 cfs
= 6 min
= 480.83 ft
= 503 cuft
Storage Indication method used.
Q (cfs)
0.10
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.02
0.01 II.-.....
0.00
0 29
- Hyd NO.3
58
87
- Hyd NO.2
Pipe Storage
Hyd. No.3 -- 1 Yr
116
145
Hydrograph Volume = 0 cult
174
203
232
261
Q (cfs)
0.10
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.02
0.01
0.00
290
Time (hrs)
Pond Report
I:
~
Friday. Sep 29 2006.11:13 AM
Hydraflow Hydrographs by Inlelisolve
Pond No.3. Pipe Storage
Pond Data
Pipe dia. = 4.50 ft Pipe length = 795.0 ft No. Barrels = 1.0 Slope = 0.20 % Invert elev. = 479.83 ft
Stage I Storage Table
Stage (ft) Elevation (ft) Contour area (sqft) Iner. Storage (euft) Total storage (euft)
0.00 479.83 00 0 0
0.30 480.13 00 62 62
0.61 480.44 00 109 171
0.91 480.74 00 197 367
1.22 481.05 00 495 862
1.52 481.35 00 651 1,513
1.83 481.66 00 793 2,306
2.13 481.96 00 921 3,227
2.44 482.27 00 995 4,222
2.74 482.57 00 1,042 5,264
3.05 482.88 00 1,061 6,325
3.35 483.18 00 1,064 7,389
3.65 483.48 00 1,039 8,428
3.96 483.79 00 995 9,423
4.26 484.09 00 920 10,343
4.57 484.40 00 794 11,137
4.87 484.70 00 649 11,785
5.18 485.01 00 494 12,279
5.48 485.31 00 196 12,476
5.79 485.62 00 109 12,585
6.09 485.92 00 62 12,646
Culvert I Orifice Structures
[A] [B] [C] [0]
Rise (in) 12.00 8.00 6.00 0.00
Span (in) 12.00 8.00 6.00 0.00
No. Barrels 1 1 1 0
Invert EI. (ft) = 479.83 479.83 481.00 0.00
Length (ft) = 10.00 0.00 0.00 0.00
Slope (%) = 0.30 0.00 0.00 0.00
N-Value = .013 .013 .013 .013
Orif. Coeff. = 0.60 0.60 0.60 0.60
Multi-Stage = nfa Yes Yes No
Weir Structures
[A] [8] [C] [0]
Crest Len (ft) = 3.14 0.50 0.00 0.00
Crest EI. (ft) = 483.50 483.17 0.00 0.00
Weir Coeff. = 3.33 3.33 0.00 0.00
Weir Type = Riser Reel
Multi-Stage = Yes Yes No No
Exfiltration = 0.000 infhr (Wet area) Tailwater Elev. = 481.65 ft
.- ~
--- ----
----- ....
------- ...-
Slage(ft)
7.00
6.00
5.00
4.00
3.00
2.00
1.00
0.00
0.00
1.00
2.00
3.00
- Total Q
Note: Culvert/Orifice outflows have been analyzed under inlet and outlet control.
Stage I Discharge
Stage (ft)
7.00
6.00
5.00
4.00
3.00
2.00
1.00
4.00
5.00
6.00
7.00
0.00
8.00
Discharge (cfs)
Hydrograph Plot
6
Hydranow Hydrographs by Intelisolve
Friday, Sep 29 2006, 11: 13 AM
Hyd. No. 1
EX RUNOFF
Hydrograph type = SCS Runoff
Storm frequency = 1 0 yrs
Drainage area = 6.200 ac
Basin Slope = 0.0%
T c method = TR55
Total precip. = 2.57 in
Storm duration = 24 hrs
Peak discharge = 2.81 cfs
Time interval = 6 min
Curve number = 80
Hydraulic length = 0 ft
Time of cone. (Tc) = 16.00 min
Distribution = Type I
Shape factor = 484
Hydrograph Volume = 19,783 cull
Q (cfs)
3.00
EX RUNOFF
Hyd. NO.1 -- 10 Yr
Q (cfs)
3.00
2.00
~ ~
) -
\
2.00
1.00
1.00
0.00
o
2
4
6
8
10
12
14
16
18
20
22
24
0.00
26
Time (hrs)
- HydNo.1
Hydrograph Plot
7
Hydraflow Hydrographs by Intelisolve
Friday, Sep 29 2006, 11 :13 AM
Hyd. No. 2
PROPOSED
Hydrograph type = SCS Runoff
Storm frequency = 1 0 yrs
Drainage area = 6.220 ac
Basin Slope = 0.0%
T c method = USER
Total precip. = 2.57 in
Storm duration = 24 hrs
Peak discharge = 6.33 cfs
Time interval = 6 min
Curve number = 92
Hydraulic length = 0 ft
Time of cone. (Tc) = 10.00 min
Distribution = Type I
Shape factor = 484
Q (cfs)
7.00
Hydrograph Volume = 37,214 cult
PROPOSED
Hyd. NO.2 -- 10 Yr
6.00
-~--
.----
\
J "- I---
-- 1\
5.00
4.00
3.00
2.00
1.00
0.00
o
18
24
2
4
6
8
10
12
14
16
20
22
- HydNo.2
Q (cfs)
7.00
6.00
5.00
4.00
3.00
2.00
1.00
0.00
26
Time (hrs)
Hydrograph Plot
8
Hydraflow Hydrographs by Intelisolve
Friday, Sep 29 2006,11:13 AM
Hyd. No. 3
Pipe Storage
Hydrograph type
Storm frequency
Inflow hyd. No.
Reservoir name
= Reservoir
= 1 0 yrs
= 2
= Pipe Storage
Peak discharge
Time interval
Max. Elevation
Max. Storage
= 2.80 cfs
= 6 min
= 483.28 ft
= 7,731 cuft
Storage Indication method used.
Hydrograph Volume = 34,987 cult
Q (cfs)
7.00
Pipe Storage
Hyd. NO.3 -- 10 Yr
Q (cfs)
6.00
\\
\\
V '---- ,
-- \..
7.00
6.00
5.00
5.00
4.00
4.00
3.00
3.00
2.00
2.00
1.00
1.00
0.00
o
2
4
6
8
10
12
14
16
18
20
22
24
0.00
26
Time (hrs)
- HydNo. 3
- Hyd NO.2
Pond Report
9
Friday, Sep 292006,11:13 AM
Hydraflow Hydrographs by Inlelisolve
Pond No. 3 - Pipe Storage
Pond Data
Pipe dia. = 4.50 ft Pipe length = 795.0 ft No. Barrels = 1.0 Slope = 0.20 % Invert elev. = 479.83 ft
Stage I Storage Table
Stage (ft) Elevation (ft) Contour area (sqft) Incr. Storage (cuft) Total storage (cuft)
0.00 479.83 00 0 0
0.30 480.13 00 62 62
0.61 480.44 00 109 171
0.91 480.74 00 197 367
1.22 481.05 00 495 862
1.52 481.35 00 651 1,513
1.83 481.66 00 793 2,306
2.13 481.96 00 921 3,227
2.44 482.27 00 995 4,222
2.74 482.57 00 1.042 5,264
3.05 482.88 00 1,061 6,325
3.35 483.18 00 1,064 7,389
3.65 483.48 00 1,039 8,428
3.96 483.79 00 995 9,423
4.26 484.09 00 920 10,343
4.57 484.40 00 794 11,137
4.87 484.70 00 649 11,785
5.18 485.01 00 494 12,279
5.48 485.31 00 196 12.476
5.79 485.62 00 109 12,585
6.09 485.92 00 62 12.646
Culvert I Orifice Structures
[A] [B) [C] [D)
Rise (in) = 12.00 8.00 6.00 0.00
Span (in) = 12.00 8.00 6.00 0.00
No. Barrels = 1 1 1 0
Invert EI. (ft) = 479.83 479.83 481.00 0.00
Length (ft) = 10.00 0.00 0.00 0.00
Slope (%) = 0.30 0.00 0.00 0.00
N-Value = .013 .013 .013 .013
Orif. Coeff. = 0.60 0.60 0.60 0.60
Multi-Stage = nfa Yes Yes No
Weir Structures
[A] [B) [C) [D)
Crest Len (ft) = 3.14 0.50 0.00 0.00
Crest EI. (ft) = 483.50 483.17 0.00 0.00
Weir Coeff. = 3.33 3.33 0.00 0.00
Weir Type = Riser Reel
Multi-Stage = Yes Yes No No
Exfiltration = 0.000 infhr (Wet area) Tailwater Elev. = 481.65 Il
~ ~
--- ~
~ l--
------- ..-/
Stage (Il)
7.00
6.00
5.00
4.00
3.00
2.00
1.00
0.00
0.00
2.00
3.00
1.00
- Total Q
Note: CulverUOrifice oulflows have been analyzed under inlet and oullet control.
Stage I Discharge
Stage (Il)
7.00
6.00
5.00
4.00
3.00
2.00
1.00
4.00
6.00
0.00
8.00
Discharge (efs)
5.00
7.00
Hydrograph Plot
10
Hydraflow Hydrographs by Intelisolve
Friday, Sep 29 2006.11:13 AM
Hyd. No. 1
EX RUNOFF
Hydrograph type = SCS Runoff
Storm frequency = 1 00 yrs
Drainage area = 6.200 ac
Basin Slope = 0.0%
T c method = TR55
Total precip. = 3.85 in
Storm duration = 24 hrs
Peak discharge = 6.47 cfs
Time interval = 6 min
Curve number = 80
Hydraulic length = 0 ft
Time of cone. (Tc) = 16.00 min
Distribution = Type I
Shape factor = 484
Hydrograph Volume = 40,477 cuft
Q (cfs)
7.00
EX RUNOFF
Hyd. NO.1 -- 100 Yr
Q (cfs)
7.00
6.00
--- ~- -
-I--
\
) ..... ~
-
- \.
6.00
5.00
5.00
4.00
4.00
3.00
3.00
2.00
2.00
1.00
1.00
0.00
o
2
4
6
8
10
12
14
16
18
20
22
24
0.00
26
Time (hrs)
- HydNo.1
11
Hydrograph Plot
Hydraflow Hydrographs by Intelisolve
Friday, Sep 29 2006,11:13 AM
Hyd. No. 2
PROPOSED
Hydrograph type = SCS Runoff
Storm frequency = 1 00 yrs
Drainage area = 6.220 ac
Basin Slope = 0.0%
T c method = USER
Total precip. = 3.85 in
Storm duration = 24 hrs
Peak discharge = 10.72 cfs
Time interval = 6 min
Curve number = 92
Hydraulic length = 0 ft
Time of cone. (Tc) = 10.00 min
Distribution = Type I
Shape factor = 484
Hydrograph Volume = 62,928 cuft
Q (cfs)
12.00
PROPOSED
Hyd. No.2 -- 100 Yr
Q (cfs)
12.00
2.00
\
l/ ~ --------
--- I\.
10.00
10.00
8.00
8.00
6.00
6.00
4.00
4.00
2.00
o
2
4
6
8
10
12
14
16
18
20
22
24
0.00
26
Time (hrs)
0.00
- Hyd No.2
Hydrograph Plot
12
Hydraftow Hydrographs by Intelisolve
Friday. Sep 29 2006,11:13 AM
Hyd. No. 3
Pipe Storage
Hydrograph type
Storm frequency
Inflow hyd. No.
Reservoir name
= Reservoir
= 100 yrs
= 2
= Pipe Storage
Peak discharge
Time interval
Max. Elevation
Max. Storage
= 6.31 cfs
= 6 min
= 484.51 ft
= 11,371 cuft
Storage Indication method used.
Hydrograph Volume = 60,701 cuft
Q (cfs)
12.00
Pipe Storage
Hyd. NO.3 -- 100 Yr
Q (cfs)
12.00
8.00
---
-
\\
) '; ~
....
-:- "
10.00
10.00
8.00
6.00
6.00
4.00
4.00
2.00
2.00
0.00
o
2
4
6
8
10
12
14
16
18
20
22
24
0.00
26
Time (hrs)
- HydNo. 3
- Hyd No. 2
Pond Report
13
Friday, Sep 29 2006,11:13 AM
Hydrafiow Hydrographs by Inlelisolve
Pond No. 3 - Pipe Storage
Pond Data
Pipe dia. = 4.50 ft Pipe length = 795.0 ft No. Barrels = 1.0 Slope = 0.20 % Invert elev. = 479.83 ft
Stage I Storage Table
Stage (ft) Elevation (ft) Contour area (sqft) Incr. Storage (cuft) Total storage (cuft)
0.00 479.83 00 0 0
0.30 480.13 00 62 62
0.61 480.44 00 109 171
0.91 480.74 00 197 367
1.22 481.05 00 495 862
1.52 481.35 00 651 1,513
1.83 481.66 00 793 2,306
2.13 481.96 00 921 3,227
2.44 482.27 00 995 4,222
2.74 482.57 00 1,042 5,264
3.05 482.88 00 1,061 6,325
3.35 483.18 00 1,064 7,389
3.65 483.48 00 1,039 8,428
3.96 483.79 00 995 9,423
4.26 484.09 00 920 10,343
4.57 484.40 00 794 11,137
4.87 484.70 00 649 11,785
5.18 485.01 00 494 12,279
5.48 485.31 00 196 12,476
5.79 485.62 00 109 12,585
6.09 485.92 00 62 12,646
Culvert I Orifice Structures
[A] [B] [C] [0]
Rise (in) 12.00 8.00 6.00 0.00
Span (in) = 12.00 8.00 6.00 0.00
No. Barrels = 1 1 1 0
Invert EI. (ft) = 479.83 479.83 481.00 0.00
Length (ft) = 10.00 0.00 0.00 0.00
Slope ("!o) = 0.30 0.00 0.00 0.00
N-Value = .013 .013 .013 .013
Orif. Coeff. = 0.60 0.60 0.60 0.60
Multi-Stage = n/a Yes Yes No
Weir Structures
[A] [B] [C] [0]
Crest Len (ft) = 3.14 0.50 0.00 0.00
Crest EI. (ft) = 483.50 483.17 0.00 0.00
Weir Coeff. = 3.33 3.33 0.00 0.00
Weir Type = Riser Rect
Multi-Stage = Yes Yes No No
Exfiltration = 0.000 in/hr (Wet area) Tailwater Elev. = 481.65 ft
........ ~
-- ~
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------ V
--
Stage (ft)
7.00
6.00
5.00
4.00
3.00
2.00
1.00
0.00
0.00
1.00
2.00
3.00
- Total Q
Note: Culvert/Orifice outflows have been analyzed under inlet and outlet controL
Stage I Discharge
Stage (ft)
7.00
6.00
5.00
4.00
3.00
2.00
1.00
4.00
5.00
6.00
7.00
0.00
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Discharge (ets)
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DUBLIN, CALIFORNIA
Appendix E:
Moller Ranch/Casamira Valley Traffic Study
Initial Study/Mitigated Negative Declaration for the Vargas Project
City of Dublin
March 2007
A Traffic Study for the Proposed
Casamira Valley Development
DRAFT
Traffic Report
Prepared for:
City of Dublin
Prepared by:
........ _ .,.. Kimley-Horn
......... _ r ~ and Associates, Inc.
July 17, 2006
REC::IVEO
JUL 1 9 2006
DUBLIN PLA
IVNING
097059009
Copyright @ 2006, Kimley-Horn and Associates, Inc.
. j
TABLE OF CONTENTS
, ,
1 INTRODUCTION AND SUMMARY ................................................................................................... 1
1.1 INTRODUCTION .............................................................................................................................. 1
1.2 SUMMARy........ ............ .......... .......... .... ............. .................... ........... ................... ......... ..... ....... ..... 1
2 INTERSECTION ANALYSIS METHODOLOGY ..............;................................................................ 8
2.1 STUDY INTERSECTIONS AND SCENARIOS......................................................................................... 8
2.2 LEVEL OF SERVICE ANALYSIS METHODOLOGy...................,............................................................. 9
2.3 SIGNIFICANT IMPACT CRITERIA .......................................................................................................9
3 EXISTING CONDITIONS .............. ................................................................................................... 11
3.1 ROADWAY NElWORK ................................................................................................................... 11
3.2 ExiSTING TRANSIT SERVICE ......................................................................................................... 13
3.3 LEVEL OF SERVICE ANALYSIS (EXISTING CONDITIONS) .................................................................. 13
4 BASELINE CONDITIONS ............................................................................................................... 16
4.1 INTRODUCTION ............... ......................................... ............................................ ........................ 16
4.2 TRIP GENERATION ..................................................................... ................. .................... ....... ...... 16
4.3 TRIP DISTRIBUTION AND ASSIGNMENT........................................................................................... 16
4.4 PLANNED ROADWAY IMPROVEMENTS............................................................................................ 17
4.5 LEVEL OF SERVICE ANALYSIS (BASELINE CONDITIONS).................................................................. 19
5 BASELINE PLUS PROJECT CONDITIONS................................................................................... 20
5.1 INTRODUCTION ............................................................................................................................ 20
5.2 PROJECT TRIP GENERATION ........................................................................................................ 20
5.3 PROJECT TRIP DISTRIBUTION AND ASSIGNMENT ............................................................................ 20
5.4 LEVEL OF SERVICE ANALYSIS (BASELINE PLUS PROJECT CONDITIONS) .......................................... 20
5.5 RECOMMENDED OFF-SITE PROJECT IMPROVEMENTS .................................................................... 24
5.6 SITE ACCESS, PARKING AND CIRCULATION ................................................................................... 25
6 BUILDOUT CON DITIONS ............................................................................................................... 26
6.1 INTRODUCTION.. ....................................... .................................. .................................. ............... 26
6.2 BUILDOUT ROADWAY IMPROVEMENTS........................................,.................................................. 26
6.3 LEVEL OF SERVICE ANALYSIS (BUILDOUT CONDITIONS) ................................................................. 27
7 ROADWAY SEGMENT ANALYSIS ................................................................................................ 31
, ,
, ,
, ,
!
,; ~
8 FREEWAY ANALYSIS ............................................................... ..................................................... 34
9 BASELINE PLUS PROJECT ALTERNATIVE CONDITIONS ........................................................ 36
9.1 INTRODUCTION ....................................................................... ......................... ....... ..................... 36
9.2 PROJECT TRIP GENERATION ........................................................................................................36
9.3 PROJECT TRIP DISTRIBUTION AND ASSiGNMENT............................................................................ 36
9.4 LEVEL OF SERVICE ANALYSIS (BASELINE PLUS PROJECT ALTERNATIVE CONDITIONS) ..................... 36
9.5 RECOMMENDED OFF-SITE PROJECT IMPROVEMENTS .................................................................... 39
9.6 SITE ACCESS, PARKING AND CIRCULATION ................................................................................... 39
10 BUILDOUT WITH PROJECT ALTERNATIVE CONDITIONS ...................................................... 40
10.1 INTRODUCTION ........ ............ ............. ............ ................................................ ................... ..... ..... 40
10.2 BUILDOUT ROADWAY IMPROVEMENTS.........................................................................................40
10.3 LEVEL OF SERVICE ANALYSIS (BUILDOUTWITH PROJECT ALTERATIVE CONDITIONS) .................... 40
11 ROADWAY SEGMENT ANALYSIS WITH PROJECT ALTERNATIVE .......................................41
12 FREEWAY ANALYSIS WITH PROJECT ALTERNATIVE ...........................................................43
13 CONCLUSIONS ..................................................................... ........................................................ 45
LIST OF TABLES
r'
TABLE 1: INTERSECTION LEVELS OF SERVICE - EXISTING CONDITIONS .................................................... 15
TABLE 2; INTERSECTION LEVELS OF SERVICE - BASELINE CONDITIONS.................................................... 19
TABLE 3: PROPOSED PROJECT TRIP GENERATION .................................................................................. 20
TABLE 4; INTERSECTION LEVELS OF SERVICE - BASELINE PLUS PROJECT CONDITIONS............................. 24
TABLE 5: INTERSECTION LEVELS OF SERVICE - BUllOOUT CONDITIONS ................................................... 29
TABLE 6: ROADWAY SEGMENT ADT ....................................................................................................... 31
TABLE 7; SUMMARY OF FREEWAY ANALYSIS ...........................................................................................35
TABLE 8: PROPOSED PROJECT ALTERNATIVE TRIP GENERATION ............................................................. 36
TABLE 9; INTERSECTION LEVELS OF SERVICE - BASELINE PLUS PROJECT ALTERNATIVE CONDITIONS ....... 39
TABLE 10: ROADWAY SEGMENT ADTwlTH PROJECT ALTERNATIVE......................................................... 41
TABLE 11; SUMMARY OF PROJECT ALTERNATIVE FREEWAY ANALYSIS ..................................................... 43
LIST OF FIGURES
FIGURE 1: VICINITY MAP .......................................................................................................................... 6
FIGURE 2: PROPOSED SITE PLAN ..................................................................................:,.......................... 7
FIGURE 3: EXISTING LANE GEOMETRy.................................................................................................... 12
FIGURE 4: EXISTING TURNING MOVEMENT VOLUMES............................................................................... 14
FIGURE 5: BASELINE TURNING MOVEMENT VOLUMES.............................................................................. 18
FIGURE 6: PROJECT TRIP ASSIGNMENT .................................................................................................. 22
FIGURE 7: BASELINE PLUS PROJECT TURNING MOVEMENT VOLUMES....................................................... 23
FIGURE 8: BUILDOUT TURNING MOVEMENT VOLUMES .........................................._.................................. 28
FIGURE 9: AVERAGE DAILY TRAFFIC (ADT) ON TASSAJARA ROAD ........................................................... 33
FIGURE 10: PROJECT ALTERNATIVE TRIP ASSIGNMENT ...........................................................................37
FIGURE 11: BASELINE PLUS PROJECT ALTERNATIVE TURNING MOVEMENT VOLUMES................................ 38
FIGURE 12: AVERAGE DAILY TRAFFIC (ADT) ON TASSAJARA ROAD WITH PROJECT ALTERNATIVE ............. 42
LIST OF APPENDICES
ApPENDIX A - LEVEL OF SERVICE METHODOLOGY
ApPENDIX B - LEVEL OF SERVICE WORKSHEETS: EXISTING CONDITIONS
ApPENDIX C - LIST OF ApPROVED, PENDING PROJECTS AND BUILDOUT PROJECTS, LANE GEOMETRY AND
CONTROL ASSUMPTIONS, AND TURNING MOVEMENT VOLUMES
APPENDIX D - LEVEL OF SERVICE WORKSHEETS; BASELINE CONDITIONS
ApPENDIX E - LEVEL OF SERVICE WORKSHEETS: BASELINE PLUS PROJECT CONDITIONS
APPENDIX F - LEVEL OF SERVICE WORKSHEETS: BASELINE PLUS PROJECT ALTERNATIVE CONDITIONS
ApPENDIX G - LEVEL OF SERVICE WORKSHEETS: BUllOOUT CONDITIONS
JIIIII"'1__1n1 Kimlay-Hom
IIIIl..J ~ and Associa1es, Inc.
Introduction and Summary
1 INTRODUCTION AND SUMMARY
1.1 Introduction
, I
, .
This report presents the results of Kimley-Horn's traffic impact study of the proposed Casamira Valley
development to be located on the Moller Property, a vacant parcel to the east of Tassajara Road and
north of the future Fallon Crossings site. The proposed Project would include a total of 179 single-
family homes and 16 duplex units. Figure 1 shows the study area, and Figure 2 shows the proposed
Project site plan.
Analysis of an alternative site plan and land use (the "Project alternative") is also included in this
report. The Project alternative would include 326 attached town homes to be built on the Project site.
The purpose of this traffic study is to evaluate the proposed Project with respect to the potential traffic
impacts, short-term and long-term roadway and circulation needs, potential mitigation measures, and
any critical traffic issues that should be addressed in the on-going planning process. Nine existing
and five future intersections near the proposed Project were identified as locations that may
potentially be impacted by the development. Arterial roadway segments and freeway segments were
also analyzed for potential impacts.
, .
The intersection and roadway operating conditions were evaluated under the following six scenarios:
I.
1 . Existing Conditions
2. . Baseline Conditions
3. Baseline Plus Project Conditions
4. Buildout Conditions (Year 2025)
5. Baseline Plus Project Alternative Conditions
6. Buildout With Project Alternative Conditions
This traffic study will be used as a background document to identify impacts and mitigation measures
related to environmental review of the Casamira Valley Project under CEQA. The study will also be
used to evaluate the proposed circulation and access for the Project under the design and
improvement standards and policies in the City's general plan, specific plan, and subdivision and
zoning ordinances. Pursuant to this evaluation, the study recommends measures that are not
required as CEQA mitigations, but will improve the Project's circulation and access and assure
compliance with applicable design and operation standards and policies.
A residential development Project, Fallon Crossings, is proposed on the Mission Peak property
located adjacent to the south of the Casamira Valley Project. A traffic study for the Fallon Crossings
Project was completed in September 2005 (T JKM Transportation Consultants. "A Traffic Study for the
Proposed Fallon Crossings Development." September 28, 2005). This document ("Fallon Crossings
report") served as the base for this Casamira Valley traffic study. Much of the analyses for Existing
and Buildout Conditions were taken directly from the Fallon Crossings report per the City's request.
Other analysis and recommendations were taken from this report as noted.
1.2 Summary
The proposed Project is expected to generate 141 AM peak-hour trips and 189 PM peak-hour trips,
while the proposed Project alternative of 326 attached townhomes is expected to generate 143 AM
peak-hour trips and 170 PM peak-hour trips. Neither proposed land use for the Project is expected to
generate more AM or PM peak-hour trips than designated by the City's General Plan; therefore, no
additional traffic impact analysis of the Project is required by the Alameda County Congestion
Management Agency (ACCMA) to satisfy the land Use Analysis Program of the Alameda County
Congestion Management Program (CMP).
Casamira Valley Residential Development
Final Traffic Report
July 17, 2006
Page 1
.....-J_- r-. K1m1ey-Hom
IIII.....J ~ and Associates, Inc.
Introduction and Summary
, .
Currently, all existing study intersections operate at acceptable levels of service. They are all
expected to continue to operate acceptably under Baseline, Baseline Plus Project, and Baseline Plus
Project Alternative Conditions.
Under Buildout Conditions and Buildout With Project Alternative Conditions, 12 of the 14 study
intersections are expected to operate acceptably during the peak hours. The intersections of
Dougherty Road/Dublin Boulevard and Santa Rita Road/I-580 Eastbound Ramps are expected to
operate unacceptably during the PM peak hour.
Cumulative Impacts and Mitiqations
Required mitigation measures for Buildout and Buildout With Project Alternative Conditions, as
included in the Fallon Crossings report, are described below. All references to the "Project" include
the original proposed Project and the Project alternative. No additional mitigations are required as
part of the analysis for the Casamira Valley Project.
1. The Dougherty Road/Dublin Boulevard intersection will operate at LOS E during the PM peak
hour under Buildout Conditions (including the Project). This LOS represents a significant
cumulative impact.
Mitigation Measure 1. Improvements at the Dublin Boulevard/Dougherty Road
intersection are included in the Eastern Dublin Traffic Impact Fee (TIF) program. The
Project is required to make its fair share payment of impact fees for these
improvements.
The Project developer shall advance to the City applicable monies for acquisition of
right-of-way and construction of the improvements assumed in this study for the
intersection of Dublin Boulevard/Dougherty Road. The amount of money advanced to
the City shall be based on the developer's fair share of the deficit (spread over those
Projects that are required to make up the deficit) between funds available to the City
from Category 2 Eastern Dublin TIF funds and the estimated cost of acquiring the
right-of-way and constructing the improvements. The City will provide credit for
Category 2 Eastern Dublin TIF to the developer for any advance of monies made for
the improvements planned for the Dublin BoulevardlDougherty Road intersection.
Additional improvements to improve the LOS at the Dougherty Road/Dublin Boulevard
intersection to an acceptable level (LOS D or better) under Buildout Conditions would require
adding a fourth northbound left-turn lane on Dougherty Road. Allowing four lanes of traffic to
perform a left-turn movement simultaneously would raise major concerns regarding the safety
of such an operation. Moreover, additional improvements to reduce traffic impacts at this
intersection are not feasible given the physical constraints at the intersection. On a periodic
basis, the City should monitor the operations of Dougherty RoadlDublin Boulevard, as well as
other intersections at the 1-580 interchanges, during the PM peak hour. Level of service
analysis for this intersection should be updated as forecasted peak hour volumes become
available.
Therefore, the impact at the Dougherty Road/Dublin Boulevard intersection under Buildout
Conditions remains a significant cumulative impact.
2. The Santa Rita/I-580 Eastbound Ramps intersection will operate at LOS E during the PM
peak hour under Buildout Conditions (including the Project). This LOS represents a
significant cumulative impact.
CasamJra Valley Residential Development
Final Traffic Report
July 17, 2006
Page 2
~_-n Kimley-Hom
~ U and Associates, Inc.
Introduction and Summary
Adding a third left turn lane for the eastbound off-ramp approach at the intersection of Santa
Rita Road/I-580 Eastbound Ramps is expected to improve the intersection level of service to
LOS 0 during the PM peak hour under Buildout Conditions.
, I
Mitigation Measure 2. The Project developer shall contribute a pro-rata share of the
cost to improve the intersection of Santa Rita Roadll-580 Eastbound Off.Ramp-Pimlico
Drive to include a third left-turn lane for the eastbound off-ramp approach at this
intersection and other downstream improvements including modifications to the
striping on the northbound lanes of the Tassajara Roadll-580 overpass to accept traffic
from the third left-turn lane and maintain three northbound through lanes at the
Tassajara Roadll-580 Westbound Ramps intersection.
The current Eastern Dublin TIF program does not include this improvement; however, the
program will be amended in 2006 to include this improvement. With this improvement, the
impact at the Santa Rita/I-580 Eastbound Ramps intersection under Buildout Conditions will
be reduced to a less-than-significant level.
3. With the proposed Project traffic added to Year 2030 No Project mainline freeway volumes,
projected LOS on 1-580 and 1-680 would remain unchanged. However, with a projected LOS
F on various segments of 1-580 and 1-680, Project trips would be adding to an already
deficient condition. These specific segments would not meet the ACCMA monitoring
standard of LOS E during the AM or PM peak hour. This is considered a significant
cumulative impact.
Although efficiency improvements (such as HOV Lanes) and expanded public transportation
could be added in the 1-580 corridor, little or no additional freeway capacity for single-
occupant vehicles is planned. Actions to encourage alternative travel modes include
advocating HOV lanes on 1-580, extending BART to Livermore, implementing the 1-580 Smart
Corridor approach (including adaptive signal timing, transit priority systems, incident
management, and ramp metering), and supporting other major investments in transit. In
addition, the City of Dublin plans to construct the Dublin Boulevard extension to North
Canyons Parkway in Livermore as a six-lane parallel arterial that will provide additional lane
capacity along the 1-580 corridor.
Mitigation Measure 3. The Project is required to pay the Tri-Valley Transportation
Development (TVTD) Fee for its proportionate share of 1-580 and 1-680 improvements,
including HOV lanes, auxiliary lanes, and interchange improvements. The Project will
also pay its proportionate share toward public transportation improvements (e.g., West
Dublin BART Station and Express Bus Service from Livermore to East Dublin BART
Station) by payment of the TVTD Fee.
Even though the above improvements will ameliorate traffic conditions on 1-580 and 1-680 in
the Tri-Valley, they will not mitigate the contribution of projected traffic demand from the
Project on these freeways to a less-than-significant level. Therefore, the impact on the
freeway system of 1-580 and 1-680 in the Project area remains a significant, unavoidable
cumulative impact, and no additional impact beyond the analyses of the Eastern Dublin EIR
or subsequent supplemental EIRs is identified.
Casamira Valley Residential Development
Final Traffic Report
July 17, 1006
Page 3
, .
j
~_-~ Kimley"Hom
~ ~ and Associates, Inc.
Introduction and Summary
Recommended Proiect Improvements
The following sections present measures that are not required as CEQA mitigations, but will improve
the Project's circulation and access and assure compliance with applicable City design and operation
standards and policies.
, .
Off-Site Project Improvements
1. Based on traffic safety considerations, traffic signals should be installed to control traffic at
the two intersections providing access to and from the Project site.
2. Under Baseline Plus Project Conditions, for each northbound approach to intersections of
Tassajara Road/North Project Access Street and Tassajara Road/South Project Access
Street, one through lane and one exclusive 150-foot right-turn lane with a 90-foot taper
should be provided for Project traffic entering the site. For each southbound approach, one
through lane and an exclusive 150-foot left-turn lane with a 90-foot taper should be provided
for Project traffic entering the site. Each westbound approach should have an exclusive left-
turn lane and an exclusive 150-foot right-turn lane with a 90-foot taper for Project traffic
exiting the site. Each intersection should include a protected southbound left-turn phase.
3. The traffic signals at the two Project access intersections should be coordinated to optimize
traffic flow in the Project area. If possible, these intersections should be coordinated with the
future intersection of Tassajara Road/Fallon Road.
4. According to the site plan, the two Project access intersections are approximately 625 feet
apart, shorter than the minirnum 750-foot spacing between signalized intersections desired
by the City. The proposed spacing of these intersections should be increased closer to 750
feet if topographical restrictions permit.
5. The projected average daily traffic (ADT) for the segment of Tassajara Road between Fallon
Road and the County Limit is 13,760 vehicles per day (vpd) and 13,860 vpd under Baseline
Plus Project Conditions and Baseline Plus Project Alternative Conditions, respectively.
These volumes approach the 15,000 vpd maximum threshold standard for two-lane
roadways. Because the Casamira Valley Project is directly adjacent to this roadway segment
and will contribute to.the projected ADT on this segment, the Casamira Valley Project should
construct this widening.
6. The projected ADT for the segment of Tassajara Road between Northern Access for Dublin
Ranch West and Fallon Road is 14,610 vpd and 14,690 vpd under Baseline Plus Project
Conditions and Baseline Plus Project Alternative Conditions, respectively. These volumes
approach the 15,000 vpd maximum threshold standard for two-lane roadways. The Fallon
Crossings report recommended that the Fallon Crossings developers widen this roadway
segment from two lanes to four lanes. Because the Casamira Valley Project will contribute to
the projected ADT on this segment, the Casamira Valley Project should. construct this
widening in the event that this Project or Project Alternative is developed prior to the Fallon
Crossings Project.
7. The projected ADT for the segment of Tassajara Road between North Dublin Ranch Drive
and Northern Access for Dublin Ranch West is 18,630 vpd under Baseline Conditions. The
projected ADT is 20,100 vpd and 20,180 vpd under Baseline Plus Project Conditions and
Baseline Plus Project Alternative Conditions, respectively. These volumes exceed the
15,000 vpd maximum threshold standard for two-lane roadways. The Dublin Ranch West
report recommended that the Dublin Ranch West developers widen this roadway segment
from two lanes to four lanes. Because the Casamira Valley Project will contribute to the
projected ADT on this segment, the Casamira Valley Project should construct this widening in
Casamira Valley Residential Development
Final Traffic Report
July 17, 2006
Page"
I'
~_-., Kimley-Hom
~ U and Associales, Inc.
Introduction and Summary
the event that this Project or Project Alternative is developed prior to the Dublin Ranch West
Project.
On-Site Project Improvements
1. If bicycle lanes are placed on streets, chokers should be designed to allow bicyclists to pass
unencumbered. Signage reading "Driveways Ahead" may be posted in advance of houses to
alert drivers of driveways to serve as another means to help reduce vehicle speeds and
increase safety.
2. If speeding is observed along the Project access roads, additional traffic calming measures to
the'chokers could help maintain appropriate speeds. Narrowing the travel lanes to 11 feet
could help reduce travel speeds.
3. Seventeen homes (Lots 1-17) will front North Project Access Street before the first connector
street between North Project Access Street and South Project Access Street. Seven homes
(Lots 18-24) will front South Project Access Street before this. first connector street. These
homes will be situated on horizontal .and vertical curves that may reduce stopping sight
distance to driveways. Minimum sight distances and other roadway geometry issues should
be provided based on the City's design standards and verified during the review process.
4. The minimum distance between all driveways should be 20 feet to allow for one parking
space.
The annexation request for the proposed Project includes the Moller property and additional property
adjacent to the west (Tipper and Vargas properties). The Dublin Travel Demand Model (DTDM) used
to estimate traffic Conditions in the study area under Year 2025 Buildout Conditions included trips
generated by the Tipper and Vargas properties in accordance with the City of Dublin General Plan.
As such, traffic impacts associated with the annexation Project included future development of all
three properties that will be subject to the annexation (Moller, Tipper, and Vargas properties).
Therefore, no additional traffic impacts or mitigations are required for the annexation Project beyond
those described in this study for the Casamira Valley PrOject.
Casamira Valley Residential Development
Final Traffic Report
July 17, 2006
Page 5
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Intersection Analysis Methodology
2 INTERSECTION ANALYSIS METHODOLOGY
; .
2.1 Study Intersections and Scenarios
The following nine existing and five future intersections were identified as locations that may
potentially be impacted by the proposed Project:
1. Dougherty Road / Dublin Boulevard
2. Hacienda Drive 11-580 Eastbound Ramps
3. Hacienda Drive / 1-580 Westbound Ramps
4. Hacienda Drive I Dublin Boulevard
5. Santa Rita Road 11-580 Eastbound Ramps-Pimlico Drive
6. Tassajara Road 11-580 Westbound Ramps
7. Tassajara Road / Dublin Boulevard
8. Tassajara Road I Fallon Road (Future Intersection)
9. Fallon Road / Dublin Boulevard (Future Intersection)
10. EI Charro Road / 1-580 Eastbound Ramps
11. Fallon Road 11-580 Westbound Ramps
12. Fallon Road I Street "E" (Future Intersection)
13. Tassajara Road / North Project Access (Future Intersection)
14. Tassajara Road I South Project Access (Future Intersection)
The study intersections listed above were analyzed for the AM and PM peak periods for the following
four general scenarios:
· Existing Conditions - This scenario evaluates existing (April 2005) traffic volumes and
roadway conditions based on traffic counts, field surveys, and analysis extracted directly
from the Fallon Crossings traffic study.
· Baseline Conditions - This scenario uses existing land use conditions plus future traffic
from approved and pending Projects in Dublin, Pleasanton, and Dougherty Valley.
Approved Projects are developments that are under construction, built but not fully
occupied, or not built but have final site development review (or equivalent) approval.
Baseline Conditions for the proposed Project were developed by subtracting trips
generated by the Casamira Valley Project from the Baseline Plus Project Conditions as
presented in the Fallon Crossings traffic study, using the trip distribution and assignment
applied in that study.
· Baseline Plus Project Conditions - This scenario adds trips generated by the proposed
Casamira Valley to Baseline Conditions.
· Year 2025 Buildout Conditions - This scenario uses the traffic volume forecasts
obtained from the (DTDM) for Year 2025. Year 2025 Buildout With Project Conditions
model includes all of the approved, pending, future build out (including "general plan")
Projects, and the proposed Casamira Valley Project. For freeways, this scenario uses
Year 2030 forecasts derived from DTDM forecasts for Year 2025, as Caltrans currently
utilizes Year 2030 as the horizon year for analysis of freeway operations. Buildout
Conditions were taken directly from the Fallon Crossings traffic study.
Casamira Valley Residential Development
Final Traffic Report
July 17,2006
Page 8
~_-~ Kimiey-Hom
~ U and Associales, Inc.
Intersection Analysis Methodology
2.2 Level of Service Analysis Methodology
Sionalized Intersections
Level of service (LOS) is a measure of the quality of the overall operating characteristics of an
intersection, street, or highway. It is defined in terms of volume-to-capacity (VIC) ratios, which can be
correlated to travel time, traffic conflicts and interruptions, freedom to maneuver, driving convenience
and comfort, and operating costs. Level of service is dependent upon traffic volume and composition
of traffic.
LOS qualifies operating conditions at intersections ranging from LOS A (free-flow condition) to LOS F
(highly congested condition). The LOS calculations utilize Intersection Capacity Utilization (ICU)
methodology adopted by the Contra Costa Transportation Authority (CCTA) for signalized
intersections.
Unsianalized Intersections
The evaluation of unsignalized intersections applied the operations method of the 2000 Highway
Capacity Manual. For two-way stop-controlled intersections the average control delay for the worst
approach is reported. As for signalized intersections, LOS ranges from LOS A (free-flow condition) to
LOS F (highly congested condition).
Appendix A presents methodologies used in the LOS analysis for signalized and unsignalized
intersections.
2.3 Significant Impact Criteria
The following significant impact criteria were taken from the Fallon Crossings report.
Intersections
An impact would be significant if an intersection previously mitigated to an acceptable level would
now exceed acceptable levels. In addition, an impact would be significant jf a new intersection is
identified as exceeding acceptable levels and if such intersection was not previously identified in the
Eastern Dublin ErR as a study intersection. The General Plan standard requires that the City strive
for LOS D at intersections (General Plan Circulation and Scenic Highways Guiding Policy F).
Routes of Reaional Sianificance
With respect to routes of regional significance, an impact would be significant if such routes would fail
to comply with the applicable standard of the General Plan. The General Plan requires the City to
make a good faith effort to maintain LOS D on arterial segments of, and at the intersections of, routes
of regional significance (Dublin Boulevard, Dougherty Road, Tassajara Road and San Ramon Road)
or implement transportation improvements or other measures to improve the level of service. If such
improvements are not possible or sufficient, and the Tri-Valley Transportation Council cannot resolve
the matter, the City may modify the level of service standard assuming other jurisdictions are not
physically impacted (General Plan Circulation and Scenic Highways Guiding Policy E).
The maximum ADT threshold standards of the General Plan are used to determine the through lane
requirements for two-lane roadways (15,000 vpd), four-lane roadways (30,000 vpd), six-lane
roadways (50,000 vpd), and eight-lane roadways (70,000 vpd).
Casamira Valley Residential Development
Final Traffic Report
July 17, 2006
Page 9
11II""1__.... Kimley-Hom
III..J ~ and Associates, Inc.
Intersection Analysis Methodology
Freewav Seaments
,.
The LOS for a freeway segment is based on peak hour traffic volumes in terms of number of
passenger cars per hour. Similar to intersection operation, the 2000 Highway Capacity Manual ranks
volume-to-capacity ratios for freeway segment operation ranging from LOS A (free-flow condition) to
LOS F (highly congested condition). The standard for freeway impacts is based upon the Alameda
County Congestion Management Agency (ACCMA) monitoring standards and is established at LOS
E, which represents "at capacity" operation.
Public Transit
Public transit impacts would be significant if the demand for public transit service would be increased
above that which could be accommodated by local transit operators or agencies.
Traffic Safety
CEQA allows for consideration of increased hazards on roadway facilities as part of the basis for
identifying standards of significance. A significant traffic safety impact would include a design feature,
such as a sharp curve or dangerous intersection, which would not be consistent with City of Dublin
engineering design standards or standards published by other traffic engineering professional
organizations.
Casamira Valley Residential Development
Final TrajJic Report
July 17, 2006
Page 10
~-_~ Kimley-Hom
IIII....J ~ and Associates, Inc.
Existing Conditions
3 EXISTING CONDITIONS
3.1 Roadway Network
Because the Fallon Crossings Project is adjacent to the proposed Casamira Valley Project, lane
geometry, traffic counts, and intersection analysis were taken directly from the Fallon Crossings
report.
The description below of important roadways serving the Project site was taken from the Fallon
Crossings report.
Interstate 580 is an eight-lane east-west freeway that connects Dublin with local cities such as
Livennore and Pleasanton as well as regional origins and destinations such as Oakland, Hayward
and Tracy. In the vicinity of the proposed Project, 1-580 carries between 184,000 and 198,000 vpd
(according to Caltrans' 2003 Traffic Volumes on California State Highways) with interchanges at
Dougherty Road/Hopyard Road, Hacienda Drive, Tassajara Road/Santa Rita Road and Fallon
Road/EI Charro Road.
Interstate 680 is a six-lane north-south freeway through Alameda and Contra Costa Counties serving
such communities as Dublin, Pleasanton, and San Ramon. The new southbound 1-680 two-lane
f1yover connecting to eastbound 1-580 was completed and opened to traffic in 2002. A direct one-lane
connector ramp also exists connecting northbound 1-680 to eastbound 1-580.
Dublin Boulevard is an east-west, major arterial in the City of Dublin. Dublin Boulevard, west of
Dougherty Road, is a four to six lane divided road fronted largely by retail and commercial uses.
Between Dougherty Road and Tassajara Road, Dublin Boulevard is a six-lane divided arterial fronted
primarily by residential, commercial and vacant lands. Dublin Boulevard extends east of Tassajara
Road to Keegan Street as a four-to-five lane roadway fronted by new residential development.
Tassajara Road connects with Santa Rita Road at 1-580 to the south and continues north to the Town
of Danville. It is four lanes wide between 1-580 and North Dublin Ranch Road. North of the Contra
Costa County line, it is named Camino Tassajara. Camino Tassajara is used primarily for local traffic
in the Tassajara Valley, with some through traffic.
Santa Rita Road is a six-lane divided urban arterial from the 1-580 interchange south to Valley
Avenue. It serves the east side of Pleasanton, including the Hacienda Business Park, and provides
access to the downtown Pleasanton area.
Central Parkway is a two-to-three lane east-west collector that extends from Arnold Road to Keegan
Street (east of Tassajara Road). An extension of Central Parkway east of Fallon Road is being
planned as part of the Eastern Dublin Properties Project.
Hacienda Drive is an arterial designed to provide access to 1-580. North of 1-580, Hacienda Drive is a
three-to-six-Iane arterial running in the north-south direction from Gleason Drive southerly to 1-580. It
is primarily fronted by commercial, office and residential uses. South of 1-580, Hacienda Drive is a
six-lane divided road, a major arterial in the City of Pleasanton.
Figure 3 illustrates the existing lane geometry and intersection control at the nine existing study
intersections.
Casamira Valley Residential Development
Final Traffic Report
July 17, 2006
Page 11
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Existing Conditions
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3.2
Existing Transit Service
, )
The description below of existing transit service in the Project area was taken from the Fallon
Crossings report.
, )
Altamont Commuter Express (ACE): The Altamont Commuter Express operates three trains per day
between Stockton and San Jose. The trains provide westbound service in the morning and eastbound
service in the evening. The trains have Tri-Valley stations at Vasco Road in ~ivermore and near the
downtowns of Livermore and Pleasanton, the latter of which is most likely to serve Dublin commuters.
The ACE train was not in operation at the time the Eastern Dublin Specific Plan and General Plan
Amendment were approved and the Eastern Dublin EIR was certified.
, ,
Livermore - Amador Valley Transit Authority (LA VT A - Wheels): The Livermore-Amador Valley
Transit Authority provides bus service to the communities of Dublin, Pleasanton and Livermore.
Several bus lines currently provide service to Eastern Dublin, including lines 12, 12X, 10A, 1A, 1B,
20X and the ACE connector. Lines operate on approximately 30-minute headways. It is expected
that these lines would be expanded further as additional homes and businesses are constructed in
the Eastern Dublin area. There is a Wheels bus connection between each ACE train and the
Dublin/Pleasanton BART station with intermediate stops. Fixed route transit service, Direct Access
Responsive Transit (DART), is also available in the Dublin area.
, j
BART: The Bay Area Rapid Transit (BART) District operates trains between the Dublin-PJeasanton
station near Hacienda Drive and the Oakland-San Francisco area. BART runs at 15- to 20-minute
headways between 4:00 AM and 12:00 AM on weekdays. Saturday service is available every 20
minutes between 6:00 AM and 12:45 AM. Service is also available on Sunday from 8:00 AM to 12:45
AM with 20-minute headways. The Dublin-Pleasanton station is accessible by private auto, taxi cabs,
buses, and private shuttles as well as by pedestrians and bicyclists. The parking lot has a capacity of
approximately 1,680 parking stalls on the north side of 1-580 (i.e., Dublin side), in addition to more
parking stalls on the south side of 1-580 (i.e., Pleasanton side).
3.3 level of Service Analysis (Existin~ Conditions)
The existing AM and PM peak hour traffic volume counts were conducted at the nine existing study
intersections in April 2005. Figure 4 shows the current peak hour turning movement volumes at the
study intersections.
Table 1 summarizes the results of the signalized and unsignalized intersection level of service
analyses for existing conditions. Detailed calculations are contained in Appendix B. Currently, all
nine existing study intersections operate at acceptable service levels during the peak hours.
Casamira VaHey Residential Development
Final Traffic Report
July 17, 2006
Page 13
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Existing Conditions
Table 1: Intersection Levels of Service - Existin Conditions
Signalized Intersections
1 Dougherty Road/Dublin Boulevard 0.60 A 0.77 C
2 Hacienda Drive/I-580 Eastbound Ramps 0.53 A 0.42 A
3 Hacienda Drive/I-580 Westbound 0.33 A 0.33 A
Ram s
4 Hacienda Drive/Dublin Boulevard 0.24 A 0.50 A
5 Santa Rita/I-580 Eastbound Off-Ramp- 0.37 A 0.45 A
Pimlico Drive
6 Tassajara Roadll-580 Westbound 0.38 A 0.36 A
Ram s
7 Tassajara Road/Dublin Boulevard 0.35 A 0.41 A
8 Tassajara Road/Fallon Road (Future N/A N/A N/A N/A
Intersection)
9 Fallon Road/Dublin Boulevard (Future N/A N/A N/A N/A
Intersection)
12 Fallon Road/Street "E" (Future N/A N/A N/A N/A
Intersection
13 Tassajara Road/North Project Access N/A N/A N/A N/A
(Future Intersection)
14 T assajara Road/South Project Access N/A N/A. N/A N/A
(Future Intersection)
Unsignalized Intersections
10
EI Charro Roadll-580 Eastbound Off-
ram
9.1
A
19.7
11
Fallon Road/I-580 Westbound Off-ramp
9.6
A
9.2
C
A
Source: TJKM Transportation Consultants. 'A Traffic Study for the Proposed Fallon Crossings Development' September 28,2005.
CasamJra Valley Residential Develop~nt
Final Traffic Report
July 17,2006
Page 15
~__.... Kimley-Hom
IIIIl....J U and Associales, Inc.
Baseline Conditions
f:
4 BASELINE CONDITIONS
Most of the discussion of the Baseline Conditions in the following sections was taken directly from the
Fallon Crossings study.
( .
4.1 Introduction
Baseline Conditions for the proposed Project were developed by subtracting trips generated by the
Casamira Valley Project from the Baseline Plus Project Conditions as presented in the Fallon
Crossings traffic study. The trip distribution and assignment assumptions applied in the Fallon
Crossings report were used in this analysis.
Baseline Conditions are Existing Conditions with the addition of traffic from approved and pending
Projects in Dublin, Pleasanton, and Dougherty Valley. Approved Projects in Dublin are developments
that are under construction, built but not fully occupied, or not built but have final site development
review (SDR) approval. City of Dublin staff provided a list of approved and pending Projects within
their jurisdiction. The City of Pleasanton and Contra Costa County were contacted in May 2005 to
ascertain approved and pending Projects, both north and south of the City of Dublin that potentially
could impact the study intersections. Tables C1 and C2 of Appendix C list approved and pending
Projects in Dublin, respectively. Table C4 of Appendix C lists approved and pending Projects in
Pleasanton and Dougherty Valley.
4.2 Trip Generation
Trip generation is defined as the number of "vehicle trips' produced by a particular land use or
Project. A trip is defined as a one-direction vehicle movement. The total number of trips generated
by each land use includes the inbound and outbound trips.
The trip rates are obtained from the standard reference Trip Generation, 7th Edition, published by the
Institute of Transportation Engineers (ITE). Trips rates were also obtained from previous traffic study
reports of corresponding Projects. Tables C1 and C2 of Appendix C summarize the trip generation
assumptions for the approved and pending Projects in Dublin, respectively. The approved Projects
identified in Table C1 are expected to generate a total of approximately 79,118 additional daily trips,
with 7,206 trips occurring during the AM peak hour, and 7,968 trips occurring during the PM peak
hour. Subtracting the number of trips associated with the Casamira Valley (Moller Property) Project,
the pending Projects identified in Table C2 are expected to generate a total of approximately 31,634
additional daily trips, with 2,586 trips occurring during the AM peak hour, and 2,766 trips occurring
during the PM peak hour.
4.3 Trip Distribution and Assignment
Trip distribution is the process of determining what proportions of vehicle trips would travel between
the Project site and various destinations within a study area. Trip assignment is the process of
determining the various paths vehicles would take from the Project site to each destination. Trip
distribution assumptions were taken from the Fallon Crossings traffic study. They were developed
based on information from previous traffic studies of approved Projects, knowledge of the area,
consultation with City staff and results from the new DTDM. Trips from approved Projects and
pending Projects were added to the existing volumes to forecast the turning volumes under Baseline
(Existing + Approved + Pending) Conditions. The traffic volumes at the study intersections for this
scenario take into account future traffic (approved plus pending) to and from Pleasanton and
Dougherty Valley.
Casamira Valley Residential Development
Final Traffic Report
July 17, 2006
Page 16
~_-r-. Kimrey-Horn
a..J U and Associates, Inc.
Baseline Conditions
, .
Figure 5 shows the forecasted turning movement volumes at the study intersections under Baseline
Conditions. Figure C1 of Appendix C illustrates lane geometry and intersection control assumptions
for Baseline Conditions. Appendix C contains Baseline Conditions turning movement volumes for
each study intersection.
4.4 Planned Roadway Improvements
For this scenario, three of the future intersections (Tassajara Road/Fallon Road, Fallon Road/Dublin
Boulevard, Fallon Road/Street "E") are assumed to be in place and signalized as part of other
development improvements expected in the area. The northeasterly leg of the Tassajara Road/Fallon
Road intersection will be constructed as part of the Fallon Crossings development. The Fallon
Road/Street "En intersection will be constructed as part of Phase 4 of the Silveria Ranch
development. The interim geometries for the Tassajara Road/Fallon Road, Fallon Road/Dublin
Boulevard, and Fallon Road/Street "En under the Baseline Conditions are shown in Figure C1 in
Appendix C.
Under Baseline Conditions, the intersections of EI Charro Road/I-580 Eastbound Ramps and Fallon
Road/l-580 Westbound Ramps will be widened and signalized as part of the Phase I Fallon Road
Interchange Improvement Project.
The intersection of Dublin Boulevard/Dougherty Road would consist of the following lane
configurations based on the improvements planned by the City of Dublin for this intersection:
· Northbound Dougherty Road approach would have three left-turn lanes, three through lanes,
and two right-turn lanes.
· Southbound Dougherty Road approach would have two left-turn lanes, three through lanes
and one shared through/right-turn lane.
· Eastbound Dublin Boulevard approach would include two left-turn lanes, three through lanes
and two right-turn lanes.
· Westbound Dublin Boulevard approach would have three left-turn lanes, three through lanes
and one right-turn lane.
These improvements are included in the City's 5-year Capital Improvement Program (CIP) and are
expected to be implemented by the time the proposed Fallon Crossings Project is fully developed.
The current CIP Project to install these improvements at Dublin Boulevard and Dougherty Road is
funded by Project developers who are required to pay their pro-rata share of the cost to construct
these improvements through payment of the Eastern Dublin Traffic Impact Fee.
The extension of Fallon Road north to Tassajara Road will include two lanes of traffic for the interim
(Eastern Dublin TIF improvement).
Casamira Valley Residential Development
Final Traffic Report
July 17, 2006
Page 17
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4.5 Level of Service Analysis (Baseline Conditions)
Table 2 summarizes the results of the signalized intersection level of service analyses for Baseline
Conditions using the fCU methodology adopted by the CCTA. Detailed calculations are contained in
Appendix D.
Table 2: Intersection Levels of Service - Baseline Conditions
1 Dougherty Road/Dublin Boulevard 0.64 B 0.73 C
2 Hacienda Drive/I-580 Eastbound Ramps 0.67 B 0.61 B
3 Hacienda Drive/I-580 Westbound Ramps 0.61 B 0.50 A
4 Hacienda Drive/Dublin Boulevard 0.50 A 0.70 B
5 Santa Rita/I-580 Eastbound Off-Ramp- 0.70 B 0.70 B
Pimlico Drive
6 Tassajara Road/I-580 Westbound Ramps 0.62 B 0.73 C
7 Tassajara Road/Dublin Boulevard 0.71 C 0.74 C
8 Tassajara Road/Fallon Road 0.62 B 0.47 A
9 Fallon Road/Dublin Boulevard 0.44 A 0.42 A
10 EI Charro Roadll-580 Eastbound Ramps 0.07 A 0.10 A
11 Fallon Road/I-580 Westbound Ramps 0.22 A 0.37 A
12 Fallon Road/Street "E" 0.09 A 0.14 A
13 Tassajara Road/North Project Access n/a n/a n/a n/a
14 Tassajara Road/South Project Access n/a n/a n/a n/a
All of the study intersections are expected to continue to operate at an acceptable service level under
Baseline Conditions.
Casamira Valley Residential Development
Final Traffic Report
July 17, 2006
Page 19
~=~
Kimley-Hom
and Associates, Inc.
Baseline Plus Project Conditions
5 BASELINE PLUS PROJECT CONDITIONS
Most of the discussion of the Baseline Plus Project Conditions in the following sections was taken
directly from the Fallon Crossings study. New onsite and offsite Project improvements and circulation
recommendations were developed for the proposed Project.
5.1 Introduction
This scenario adds trips generated by proposed Casamira Valley development to conditions in the
Baseline Conditions. The proposed Project will include 179 single-family homes and 16 duplex units.
Access to the proposed Project will be provided at North Access Road and South Access Road.
These two roads will form two full-access intersections with Tassajara Road. See Figure 2.
5.2 Project Trip Generation
Trip Generation, fh Edition, published by the Institute of Transportation Engineers (ITE), was used to
estimate the number of trips generated by the proposed Project. Summarized in Table 3, the Project
will generate 141 AM peak hour trips and 189 PM peak hour trips.
Single-Family 179 9.57 1,713 0.19 0.56 34 100 134 0.65 0.36 114 67 181
Homes
Residential
Townhouse! 16 5.86 94 0.07 0.37 6 7 0.35 0.17 5 3 8
Condominium
TOTAL 1,807 TOTAL 35 106 141 TOTAL 119 70 189
Source: Trip Generation, 7'" Edition, by ITE (Land Use Codes 210 & 230)
The proposed Project is consistent with the General Plan and Eastern Dublin Specific Plan and is not
expected to generate more AM or PM peak hour trips than anticipated in the City's General Plan;
therefore, no additional traffic impact analysis of the Project is required by the Alameda County
Congestion Management Agency (ACCMA) to satisfy the Land Use Analysis Program of the Alameda
County Congestion Management Program (CMP).
5.3 Project Trip Distribution and Assignment
Trip distribution and assignment assumptions for the proposed Project were taken from the Fallon
Crossings report and developed based on existing travel patterns, knowledge of the study area, input
from City staff, and results from the new Dublin Travel Demand Model. Trip distribution and
assignment assumptions used in Baseline Plus Project Conditions are shown in detail in Figure 6.
Twenty percent of all Project trips were assumed to be local within the study area; therefore, they
were assigned to study area intersections as appropriate. Appendix C contains Baseline Plus Project
Conditions turning movement volumes for each study intersection.
5.4 Level of Service Analysis (Baseline Plus Project Conditions)
Figure 7 shows the forecasted turning movement volumes at the study intersections under Baseline
Plus Project Conditions. Table 4 summarizes the results of the intersection level of service analysis.
Detailed calculations are contained in Appendix E.
Casamira Valley Residential Development
Final Traffic Report
July 17, 2006
Page 20
~=~
Kimley-Hom
and Associates, Inc.
Baseline Plus Project Conditions
The lane geometry and planned roadway improvements for this scenario would be the same as those
described in the previous chapter for Baseline Conditions. The lane geometry assumptions and
intersection control at the study intersections are provided in Figure C1 of Appendix C.
Casamira Valley Residentiat Development
Final Traffic Report
July 17, 2006
Page 21
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Table 4: Intersection levels of Service - Baseline Plus Pro.ect Conditions
1 Dougherty Road/Dublin Boulevard 0.64 B 0.74 C
2 Hacienda Drive/I-580 Eastbound Ramps 0.67 B 0.61 B
3 Hacienda Drive/I-580 Westbound Ramps 0.61 B 0.50 A
4 Hacienda Drive/Dublin Boulevard 0.50 A 0.70 B
5 Santa Rita/I-580 Eastbound Off-Ramp- 0.70 B 0.71 C
Pimlico Drive
6 Tassajara Road/I-580 Westbound Ramps 0.62 B 0.75 C
7 Tassajara Road/Dublin Boulevard 0.71 C 0.76 C
8 Tassajara Road/Fallon Road 0.67 B 0.50 A
9 Fallon Road/Dublin Boulevard 0.44 A 0.42 A
10 EI Charro Road/I-580 Eastbound Ramps 0.07 A 0.10 A
11 Fallon Road/I-580 Westbound Ramps 0.22 A 0.37 A
12 Fallon Road/Street "E" 0.09 A 0.14 A
13 Tassajara Road/North Project Access 0.56 A 0.65 B
14 Tassajara Road/South Project Access 0.59 A 0.68 B
Under the Baseline Plus Project Conditions, all study intersections are expected to operate at
acceptable service levels. Traffic generated by the Project results in very small changes to V/C ratios
and no changes in LOS at the study intersections. No potentially significant impacts are identified for
this scenario.
5.5 Recommended Off-Site Project Improvements
The following Project specific off-site improvements are recommended to improve access and
operations related to proposed circulation features of the Project:
1. Based on traffic safety considerations, traffic signals should be installed to control traffic at
the two intersections providing access to and from the Project site.
2. Under Baseline Plus Project Conditions, for each northbound approach to intersections of
Tassajara Road/North Project Access Street and Tassajara Road/South Project Access
Street, one through lane and one exclusive 150-foot right-turn lane with a gO-foot taper
should be provided for Project traffic entering the site. For each southbound approach, one
through lane and an exclusive 150-foot left-turn lane with a gO-foot taper should be provided
for Project traffic entering the site. Each westbound approach should have an exclusive left-
turn lane and an exclusive 150-foot right-turn lane with a gO-foot taper for Project traffic
exiting the site. Each intersection should include a protected southbound left-turn phase.
3. The traffic signals at the two Project access intersections should be coordinated to optimize
traffic flow in the Project area. If possible, these intersections should be coordinated with the
future intersection of Tassajara Road/Fallon Road.
Casamira Valley Residential Development
Final Traffic Report
July 17, 2006
Page 24
~__r-. Kimley-Hom
~ ~ and Associates, Inc.
Baseline Plus Project Conditions
4. According to the site plan, the two Project access intersections are approximately 625 feet
apart, shorter than the minimum 750-foot spacing between signalized intersections desired
by the City. The proposed spacing of these intersections should be increased closer to 750
feet if topographical restrictions permit.
5.6 Site Access, Parking, and Circulation
The proposed site plan was supplied by the City and was used in the site access, parking, and
circulation evaluations (Ruggeri, Jensen, Azar & Associates. "Preliminary Site Plan - Casamira
Valley." September 20, 2005). As shown on Figure 2, Project access will be at two driveways on
Tassajara Road. Based on review of the Project design from the proposed site plan, no significant
Project impacts are expected in terms of site access and circulation. The following are design
recommendations to improve site access, parking, and circulation for the Project area.
Both North Project Access Street and South Project Access Street run roughly east-west and form
tee-intersections to the west with Tassajara Road. Based on the proposed site plan, both streets are
approximately 32 feet wide with one travel lane in each direction. Although the streets are not
completely straight and level, they may induce speeding due to their width and the large distance
between Tassajara Road and the majority of housing lots. Installing traffic calming devices in
accordance with the City's standards would be appropriate in controlling travel speeds.
According to the site plan, mid-block curb extensions ("chokers") are proposed in advance of all
houses in both directions of travel. The travel way is reduced to approximately 24 feet through the
chokers, which is sufficient width to accommodate emergency vehicles. If bicycle lanes are placed on
streets, chokers should be designed to allow bicyclists to pass unencumbered. Signage reading
"Driveways Ahead" may be posted in advance of houses to alert drivers of driveways and to serve as
another means to help reduce vehicle speeds and increase safety.
Assuming 12 feet each for two travel lanes on the 32-foot wide access roads, one 8-foot parking lane
can be accommodated along one side of each street; however, parking would be desirable only
adjacent to parcel driveways. Along the stretches of road where parking is not provided, the wide
roadway could induce speeding. An alternative lane configuration would be 12 feet each for two
travel lanes with 4-foot bicycle lanes on each side; however, grades greater than 10 percent would
likely discourage most riders from using provided bicycle lanes.
If speeding is observed along the Project access roads, additional traffic calming measures with the
chokers could help maintain appropriate speeds. Narrowing the travel lanes to 11 feet could help
reduce travel speeds.
Seventeen homes (Lots 1-17) will front North Project Access Street before the first connector street
between North Project Access Street and South Project Access Street. Seven homes (Lots 18-24)
will front South Project Access Street before this first connector street. These homes will be situated
on horizontal and vertical curves that may reduce stopping sight distance to driveways. Minimum
sight distances and other roadway geometry issues should be provided based on the City's design
standards and verified during the review process.
According to the site plan, roads providing access to Lots 37-186 on the eastern side of the Project
site will widen to approximately 36 feet. This width is sufficient to accommodate emergency vehicle
access. If 8-foot parking lanes are provided on both sides of the streets, the remaining 20 feet of
travel way should be sufficient to allow opposing vehicles to pass, given the expected low volumes on
the streets.
The minimum distance between all driveways should be 20 feet to allow for one parking space.
Casandra Valley Residential Development
Final Traffic Report
July 17, 2006
Page 25
~=~
Kimley-Hom
and Associates, Inc.
Buildout Conditions
6 BUILDOUT CONDITIONS
This scenario adds traffic from buildout Projects in Dublin, Pleasanton and Dougherty Valley, to the
Baseline Plus Project Conditions. Buildout Conditions are based on local general plans and
expected to be in place in Year 2025. Most of the discussion and conditions were taken from the
Fallon Crossings traffic study.
6.1 Introduction
City staff provided a list of buildout Projects as shown in Table C3 of Appendix C. All of these land
uses are included in the new DTDM. The DTDM was used to forecast traffic volumes under Buildout
Conditions (Year 2025).
6.2 Buildout Roadway Improvements
Additional roadway improvements beyond those discussed previously in this report are planned within
the study area and are assumed in the Buildout Conditions analysis. They include the following:
Dublin BoulevardlTassajara Road Capacity Improvements - Addition of two westbound left-turn
lanes, one through lane and one right-turn lane; two northbound through lanes; one eastbound
through lane; and one southbound left-turn lane. Some of these improvements have been
constructed, but not open to traffic (Eastern Dublin T1F improvement).
Scarlett Drive Extension - Extension of Scarlett Drive from Dublin Boulevard north to Dougherty Road
and associated intersection improvements at Dublin Boulevard/Scarlett Drive and Dougherty
RoadlScarlett Drive (Eastern Dublin TIF improvement).
Dublin BoulevardlHacienda Drive Capacity Improvements - Addition of one westbound right-turn lane
and conversion of a northbound right-turn lane to a third through lane (Eastern Dublin T1F
improvement).
Hacienda Drive/I-S8G Westbound Off-ramp Capacity Improvements - Widening of the northbound
Hacienda overpass to four lanes to accommodate an exclusive lane leading to the 1-580 westbound
loop on-ramp. Addition of one shared righUleft-turn lane on the off-ramp approach (Eastern Dublin
T1F improvement).
Hacienda Drive/I-S8G Eastbound off-ramp capacity improvement - Addition of one shared righUleft-
turn lane on the off-ramp approach (Eastern Dublin T1F improvement).
Dublin Boulevard/Dougherty Road Capacity Improvement - Addition of ultimate improvements as
identified on pages 158, 159 and 167 of the Transit Center Draft EIR and page 3.6-17 of the East
Dublin Properties Draft Supplemental EIR. Both EIRs were certified in connection with related Project
approvals. These improvements are expected to occur with the full development of the Transit
Center Project (Eastern Dublin T1F Improvement).
Under this scenario, Dublin Boulevard (six lanes) is assumed to be extended to North Canyons
Parkway in Livermore, and Central Parkway (two or four lanes) is assumed to be extended to east of
Fallon Road. Phase II Fallon Road interchange improvements are also assumed to be in place for
Buildout Conditions.
Casamira Valley Residential Development
Final Traffic Report
July 17, 2006
Page 26
11II"'1-_ ~ Kimlay-Hom
~ U and Associa1es, Inc.
Buildout Conditions
Proiect Access Intersections
Under Buildout Conditions, each Project access intersection with Tassajara Road will have the
following lane configurations:
. Northbound approach: three through lanes and one right-turn lane.
. Southbound approach: one left-turn lane and three through lanes.
. Westbound approach: one left-turn lane and one right-turn lane.
6.3 Level of Service Analysis (Buildout Conditions)
Figure 8 shows the forecasted turning movement volumes for Buildout Conditions. Table 5
summarizes the results of the LOS analysis. The lane geometry assumptions and intersection control
at the study intersections under Buildout Conditions are provided in Figure C2 of Appendix C. The
detailed LOS calculations are contained in Appendix G.
Casamira Valley Residential Development
Final Traffic Report
July 17, 2006
Page 27
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Buildout Conditions
Table 5: Intersection Levels of Service - Buildout Conditions
1 Dougherty Road/Dublin Boulevard 0.77 C 0.93 E
2 Hacienda Drivell-S80 Eastbound Ramps 0.81 D 0.60 A
3 Hacienda Drive/I-S80 Westbound Ramps 0.79 C 0.65 B
4 Hacienda Drive/Dublin Boulevard 0.86 D 0.84 D
Santa Rita/I-S80 Eastbound Off-Ramp- 0.81 D 0.95 E
5 Pimlico Drive
- With third eastbound left-tum lane 0.75 C 0.84 D
6 Tassajara Road/I-580 Westbound Ramps 0.71 C 0.71 C
7 Tassajara Road/Dublin Boulevard 0.89 D 0.80 C
8 Tassajara Road/Fallon Road/Project Access 0.50 A 0.82 D
9 Fallon Road/Dublin Boulevard 0.76 C 0.89 D
10 EI Charro Road/I-580 Eastbound Ramps 0.59 A 0.49 A
11 Fallon Road/I-580 Westbound Ramps 0.64 B 0.66 B
12 Fallon Road/Street "E" 0.42 A 0.40 A
13 Tassajara Road/North Project Access 0.62 B 0.58 A
14 Tassajara Road/South Project Access 0.64 B 0.59 B
Source: TJKM Transportation Consultants. "A Traffic Study for the Proposed Fallon Crossings Development." September 28,2005 for Intersection 10 1-12.
Under the Buildout Conditions, operations at the two Project access intersections are expected to be
acceptable. The intersections of Dougherty Road/Dublin Boulevard and Santa Rita Road/I-S80
Eastbound Ramps-Pimlico Drive are expected to operate unacceptably at LOS E during the PM peak
hour, as described below.
Cumulative Impact 1
The Dougherty Road/Dublin Boulevard intersection would operate at LOS E (V/C = 0.93) during the
PM peak hour under Buildout Conditions (including the Project). This LOS represents a significant
cumulative impact.
Mitioation Measure 1
Improvements at the Dublin Boulevard/Dougherty Road intersection are included in
the Eastern Dublin Traffic Impact Fee (TIF) program. The Project is required to make
its fair share payment of impact fees for these improvements.
The Project developer shall advance to the City applicable monies for acquisition of
right-of-way and construction of the improvements assumed in this study for the
intersection of Dublin Boulevard/Dougherty Road~ The amount of money advanced to
the City shall be based on the developer's fair share of the deficit (spread over those
Projects that are required to make up the deficit) between funds available to the City
from Category 2 Eastern Dublin T1F funds and the estimated cost of acquiring the
right-of-way and constructing the improvements. The City will provide credit for
Casamira Valley Residential Development
Final Traffic Report
July 17, 2006
Page 29
~=~
Kimley-Hom
and Associates, Inc.
Buildout Conditions
Category 2 Eastern Dublin TIF to the developer for any advance of monies made for
the improvements planned for the Dublin Boulevard/Dougherty Road intersection.
Additional improvements to improve the LOS at the Dougherty RoadlDublin Boulevard intersection to
an acceptable level (LOS D or better) under Buildout Conditions would require adding a fourth
northbound left-turn lane on Dougherty Road. Allowing four lanes of traffic to perforrn a left-turn
movement simultaneously would raise major concerns regarding the safety of such an operation.
Moreover, additional improvements to reduce traffic impacts at this intersection are not feasible given
the physical constraints at the intersection. On a periodic basis, the City should monitor the
operations of Dougherty RoadlDublin Boulevard, as well as other intersections at the 1-580
interchanges, during the PM peak hour. Level of service analysis for this intersection should be
updated as forecasted peak hour volumes become available.
Therefore, the impact at the Dougherty Road/Dublin Boulevard intersection under Buildout Conditions
remains a significant cumulative impact.
Cumulative Impact 2
The Santa Ritall-580 Eastbound Ramps intersection would operate at LOS E (V/C = 0.95) during the
PM peak hour under Buildout Conditions (including the Project). This LOS represents a significant
cumulative impact.
Widening the eastbound off-ramp approach to include three left turn lanes, one through lane, and one
free right turn lane at the intersection of Santa Rita Roadll-580 Eastbound Off-Ramps-Pimlico Drive is
expected to improve the intersection level of service to LOS D during the PM peak hour.
Mitioation Measure 2
The Project developer shall contribute a pro-rata share of the cost to improve the
intersection of Santa Rita Roadll-580 Eastbound Off-Ramp-Pimlico Drive to include a
third left-turn lane for the eastbound off-ramp approach at this intersection and other
downstream improvements including modifications to the striping on the northbound
lanes of the Tassajara Roadll-580 overpass to accept traffic from the third left-turn lane
and maintain three northbound through lanes at the Tassajara Road/l-580 Westbound
Ramps intersection.
The current Eastern Dublin TIF program does not include this improvement; however, the program
will be amended in 2006 to include this improvement. With this improvement, the impact at the Santa
Ritall-580 Eastbound Ramps intersection under Buildout Conditions will be reduced to a less-than-
significant level.
Casamira Valley Residential Development
Final Traffic Report
July 17, 2006
Page 30
~=~
Kimley-Hom
and Associates, Inc.
Roadway Segment Analysis
7 ROADWAY SEGMENT ANALYSIS
Roadway segment analysis was conducted to determine the number of through lanes that would be
needed to have various roadway segments operate at acceptable levels of service for all study
scenarios. Existing ADT and Buildout ADT were obtained from the Fallon Crossings report.
In general, ADT volumes for existing and future scenarios were estimated by assuming that the PM
peak hour volumes were equivalent to 10 percent of daily volumes. The daily trips from the proposed
Project are based on the appropriate ITE daily trip rate. Table 6 presents the ADT on Tassajara
Road (where the majority of the Project trips are expected to travel) under Existing, Baseline,
Baseline Plus Project, and Buildout Conditions. Figure 9 also presents the same data in graphed
format.
1. Northbound Tassajara Road
between Interstate-S80 and Dublin 11,920 21,700 22,260 30,300
Boulevard
2. Tassajara Road between Dublin 18,260 33,900 34,880 48,800
Boulevard and Gleason Drive
3. Tassajara Road between Gleason 14,540 30,760 32,230 40,450
Drive and North Dublin Ranch Drive
4. Tassajara Road between North 6.8501
Dublin Ranch Drive and Northern 18,630 20,100 32,650
Access for Dublin Ranch West
5. Tassajara Road between Northern
Access for Dublin Ranch West and 6,850 13,140 14,610 27,060
Fallon Road
6. Tassajara Road between Fallon 6,850 12,030 13,760 26,430
Road and County Limit
Notes: From machine counts taken in May 2005.
Recommended Off-Site Proiect Improvements
1. The projected ADT for the segment of Tassajara Road between Fallon Road and the County
Limit is 13,760 vpd under Baseline Plus Project Conditions. This volume approaches the
15,000 vpd maximum threshold standard for two-lane roadways. Because the Casarnira
Valley Project is located directly adjacent to this roadway segment and will contribute to the
projected ADT on this segment, the Casamira Valley Project should construct this widening.
2. The projected ADT for the segment of Tassajara Road between Northern Access for Dublin
Ranch West and Fallon Road is 14,610 vpd under Baseline Plus Project Conditions. This
volume approaches the 15,000 vpd maximum threshold standard for two-lane roadways.
The Fallon Crossings report recommended that the Fallon Crossings developers widen this
roadway segment from two lanes to four lanes. Because the Casamira Valley Project will
contribute to the projected ADT on this segment, the Casamira Valley Project should
construct this widening in the event that this Project is developed prior to the Fallon
Crossings Project.
Casamira Valley Residential Development
Final Traffic Report
July 17,2006
Page 31
~=~
Kimley-Horn
and Associates, Inc.
Roadway Segment Analysis
3. The projected ADT for the segment of Tassajara Road between North Dublin Ranch Drive
and Northern Access for Dublin Ranch West is 18,630 vpd under Baseline Conditions and
20,100 vpd under Baseline Plus Project Conditions. These volumes exceed the 15,000 vpd
maximum threshold standard for two-lane roadways. The Dublin Ranch West report
recommended that the Dublin Ranch West developers widen this roadway segment from two
lanes to four lanes. Because the Casamira Valley Project will contribute to the projected ADT
on this segment, the Casamira Valley Project should construct this widening in the event that
this Project is developed prior to the Dublin Ranch West Project.
Casamira Valley Residential Development
Final Traffic Report
July 17, 2006
Page 32
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Baseline Plus Project Alternative Conditions
9 BASELINE PLUS PROJECT AL TERNATIVE ANALYSIS
Developers of the Casamira Valley Residential Project submitted a request to the City of Dublin to
study an alternative site plan and land use (the "Project alternative"). The Project alternative would
include 326 attached townhomes to be built on the Project site. The City has requested that Kimley-
Horn identify impacts to transportation and recommend Project improvements for the proposed
Project alternative.
9.1 Introduction
This scenario adds trips generated by the proposed Casamira Valley Project alternative to conditions
in the Baseline Conditions presented in Chapter 4.
9.2 Project Trip Generation
Trip Generation, fh Edition, published by the Institute of Transportation Engineers (ITE), was used to
estimate the number of trips generated by the proposed Project alternative, Summarized in Table 8,
the Project alternative will generate 143 AM peak hour trips and 170 PM peak hour trips. By
comparison, the original proposed Project will generate 141 AM peak hour trips and 189 PM peak
hour trips.
Residential
Condominium/ 326 5.86 1,910 0.07 0.37 24 119 143 0.35 0.17 114 56 170
Townhouse
Source: Trip Generation, 7. Edftion, by ITE (Land Use Code 230)
The proposed Project alternative is consistent with the General Plan and Eastern Dublin Specific Plan
and is not expected to generate more AM or PM peak hour trips than anticipated in the City's General
Plan; therefore, no additional traffic impact analysis of the Project alternative is required by the
Alameda County Congestion Management Agency (ACCMA) to satisfy the Land Use Analysis
Program of the Alameda County Congestion Management Program (CMP).
9.3 Project Trip Distribution and Assignment
Trip distribution and assignment assumptions for the Project alternative are based on those
presented in Chapter 5. Trip distribution and assignment assumptions used in Baseline Plus Project
Alternative Conditions are shown in detail in Figure 10. Appendix C contains turning movement
volumes under Baseline Plus Project Alternative Conditions for each study intersection.
9.4 Level of Service Analysis (Baseline Plus Project Alternative Conditions)
Figure 11 shows the forecasted turning movement volumes at the study intersections under the
Baseline Plus Project Alternative Conditions. Table 9 summarizes the results of the intersection level
of service analysis. Detailed calculations are contained in Appendix F.
The lane geometry and planned roadway improvements for this scenario would be the same as those
described for Baseline Conditions. The lane geometry assumptions and intersection control at the
study intersections are provided in Figure C1 of Appendix C.
Casamira Valley Residential Development
Final Traffic Report
July 17, 2006
Page 36
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Kimley-Hom
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Baseline Plus Project Alternative Conditions
Table 9: Intersection Levels of Service - Baseline Plus Pro'ect Alternative Conditions
Dougherty Road/Dublin Boulevard 0.64 B 0.74 C
2 Hacienda Drivell-580 Eastbound Ramps 0.67 B 0.61 B
3 Hacienda Drive/I-580 Westbound Ramps 0.61 B 0.50 A
4 Hacienda Drive/Dublin Boulevard 0.50 A 0.70 B
5 Santa Rita/I-580 Eastbound Off-Ramp- 0.70 B 0.71 C
Pimlico Drive
6 Tassajara Road/I-580 Westbound Ramps 0.62 B 0.74 C
7 Tassajara Road/Dublin Boulevard 0.72 C 0.76 C
8 Tassajara Road/Fallon Road 0.68 B 0.49 A
9 Fallon Road/Dublin Boulevard 0.44 A 0.42 A
10 EI Charro Roadll-580 Eastbound Ramps 0.07 A 0.10 A
11 Fallon Road/I-S80 Westbound Ramps 0.22 A 0.37 A
12 Fallon Road/Street "E" 0.09 A 0.14 A
13 Tassajara Road/North Project Access 0.56 A 0.64 B
14 Tassajara Road/South Project Access 0.60 A 0.68 B
Under the Baseline Plus Project Alternative Conditions, all study intersections are expected to
operate at acceptable service levels. Traffic generated by the Project alternative results in very small
changes to V/C ratios from Baseline Conditions and no changes in LOS at the study intersections.
The Project alternative results in changes to V/C ratios of no greater than 0.01 when compared to
results under Baseline Plus Project Conditions. No potentially significant impacts are identified for
this scenario.
9.5 Recommended Off-Site Project Improvements
Because intersection LOS results are nearly identical with the proposed Project and with the Project
alternative, the same off-site improvements presented in Chapter 5 are recommended for the
Baseline Plus Project Alternative Conditions.
9.6 Site Access, Parking, and Circulation
From discussions with City staff, no specific site plan has been developed for the Project alternative.
However, the two roads providing access to the site will remain the same, and no significant changes
to the on-site circulation are expected; therefore, the same improvements to site access, parking, and
circulation presented in Chapter 5 are recommended for the Baseline Plus Project Alternative
Conditions.
Casamira Valley Residential Development
Final Traffic Report
July 17, 2006
Page 39
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Kimley-Hom
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Buildout With Project Alternative Conditions
10 BUILDOUT WITH PROJECT ALTERNATIVE CONDITIONS
This scenario adds traffic from buildout Projects in Dublin, Pleasanton and Dougherty Valley, to the
Baseline Plus Project Alternative Conditions. Buildout With Project Alternative Conditions are based
on local general plans and expected to be in place in Year 2025.
10.1 Introduction
City staff provided a list of buildout Projects as shown in Table C3 of Appendix C. All of these land
uses are included in the new DTDM. The DTDM was used to forecast traffic volumes under Buildout
Conditions (Year 2025), which included more conservative trip generation assumptions for the Moller
property than the proposed Project alternative.
10.2 Buildout Roadway Improvements
The same additional roadway improvements presented in Chapter 6 are assumed for the Buildout
With Project Alternative Conditions.
10.3 Level of Service Analysis (Buildout With Project Alternative Conditions)
The proposed Project alternative will generate 143 AM peak hour trips and 170 PM peak hour trips.
By comparison, the original proposed Project will generate 141 AM peak hour trips and 189 PM peak
hour trips. Because the Project alternative will generate nearly the same number of trips as the
original proposed Project, the LOS analysis results presented in Chapter 6 are applicable to Buildout
With Project Alternative Conditions.
The proposed Project alternative is expected to have the same impacts to intersections as the original
proposed Project; therefore, the mitigation measures discussed in Chapter 6 are recommended under
Buildout With Project Alternative Conditions.
Casamira Valley Residential Development
Final Traffic Report
July 17, 2006
Page 40
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Kimley-Hom
and Associates, Inc.
Roadway Segment Analysis
With Project Alternative
11 ROADWAY SEGMENT ANALYSIS WITH PROJECT ALTERNATIVE
Roadway segment analysis was conducted for Baseline Plus Project Alternative and Buildout With
Project Alternative Conditions following the same methodology in Chapter 7. Table 10 presents the
ADT on Tassajara Road (where the majority of the Project trips are expected to travel) under Existing,
Baseline, Baseline Plus Project, and Buildout Conditions. Figure 12 also presents the same data in
graphed format.
1. Northbound Tassajara Road
between Interstate-580 and Dublin 11,920 21,700 22,290 30,330
Boulevard
2. Tassajara Road between Dublin 18,260 33,900 34,940 48,860
Boulevard and Gleason Drive
3. Tassajara Road between Gleason 14,540 30,760 32,310 40,530
Drive and North Dublin Ranch Drive
4. Tassajara Road between North 6,8501
Dublin Ranch Drive and Northern 18,630 20,180 32,730
Access for Dublin Ranch West
5. Tassajara Road between Northern
Access for Dublin Ranch West and 6,850 13,140 14,690 27,140
Fallon Road
6. Tassajara Road between Fallon 6,850 12,030 13,860 26,530
Road and County Limit
Notes: From machine counts taken in May 2005.
The Project alternative will add more vehicles onto each study roadway segment than the original
proposed Project, based on the daily trip generation rates.
Recommended Off-Site Proiect Improvements
Because the Project alternative will not result in a significant change in ADT from the original
proposed Project, the same off-site improvements presented in Chapter 7 are recommended for the
Project alternative scenario.
Casamira Valley Residential Development
Final Traffic Report
July 17, 2006
Page 41
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~=~
Kimley-Hom
and Associates, Inc.
Freeway Analysis with Project Alternative
12 FREEWAY ANALYSIS WITH PROJECT ALTERNATIVE
Freeway segment analysis was conducted with the Project alternative following the same
methodology in Chapter 8. Table 11 summarizes the forecasted volumes and expected levels of
service for two scenarios in 2030: without the Project alternative and with the Project alternative.
1-580,1-680 to Dougherty Road/Hopyard Road
Eastbound 9,200 6,608 D 6,803 D
Westbound 11,500 7,861 D 8,443 D
1-580, Dougherty Road/Hopyard Road to Hacienda Drive
Eastbound 14,800 11 ,423 D D 11 ,432 D 11,208 D
Westbound 10,200 10,513 F 10,780 F 10,540 F 10,796 F
1-580, Hacienda Drive to Tassajara Road/Santa Rita Road
Eastbound 11,500 9,501 D 11 ,490 F 9,510 D 11,517 F
Westbound 10,200 11,324 F 10,420 F 11,351 F 1 0,436 F
1-580, Tassajara Road/Santa Rita Road to Fallon Road/EI Charro Road
Eastbound 10,200 8,323 D 10,252 F 8.337 D 10,260 F
Westbound 10,200 8,953 D 8,102 D 8,957 D 8,115 D
1-580, Fallon Road to Airway Boulevard
Eastbound F
Westbound 10,200 D
1-680, Alcosta Boulevard to 1-580
Northbound 9,200 6,504 D 7,774 D 6,509 D 7,787 D
Southbound 9,200 9,250 F 8,927 E 9,257 F 8,931 E
1-680, 1-580 to Stoneridge Drive
Northbound 6,900 6,007 D 6,971 F 6,009 D 6,975 F
Southbound 7,900 7,370 E 6,958 E 7,374 E 6,959 E
Source: 2000 Highway Capacity Manual, Chapter 23, Exhibit23.2, LOS Criteria for Basic Freeway Segments
Maximum Service Flow Rate for freeway segments=2,300 vehicles/hr/lane, aux.=Auxiliary Lane
If number of lanes on freeway segment= N+aux., capacity of segment=(N*2300+1 000) vehicles/hr
Traffic from development in Eastern Dublin was identified as a significant unavoidable cumulative
impact on Interstate-580 in the Eastern Dublin EIR (Impacts 3.3/E and 3.3/B).
Even without the proposed Project alternative, the study mainline segments along 1-580 and 1-680 in
the vicinity of the Project site would operate unacceptably under Year 2030 conditions. The addition
of the alternative Project trips to these freeway segments would be considered a significant
unavoidable cumulative impact.
The alternative Project is required to pay for its proportionate share of impacts to 1-580 and 1-680, by
payment of TVTD Fees to construct planned freeway improvements, including HOV lanes, auxiliary
lanes, and interchange improvements. The alternative Project will also pay for its proportionate share
toward public transportation improvements to help reduce traffic on the freeways and other roadways
in the Tri-Valley Area, by payment of the TVTD Fee; two of the improvements to be funded by the
Casamira Valley Residential Development
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Ju(v 17, 2006
Page 43
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Kimley-Hom
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Freeway Analysis with Project Alternative
TVTD Fees are the West Dublin BART Station and the Express Bus Service from Livermore to the
East Dublin BART station.
The alternative Project's contribution of additional traffic to local freeways would be consistent with
what was originally analyzed in the Eastern Dublin EIR, since the number of trips that would be
generated from the proposed development is consistent with the approved General Plan and Eastern
Dublin Specific Plan. No additional impact beyond the analyses of the Eastern Dublin EIR or
subsequent supplemental EIRs is identified.
Casamira Valley Residential Development
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July 17, 2006
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Kimley-Hom
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Conclusions
13 CONCLUSIONS
The following points summarize the traffic impacts outlined above resulting from the proposed
Casamira Valley development:
. The proposed Project is expected to generate 141 AM peak-hour trips and 189 PM peak-hour
trips.
. Because the Project is consistent with the City of Dublin General Plan, it is not expected to
generate more AM or PM peak hour trips than the City's General Plan. As a result, no
additional traffic impact analysis of the Project is required by the Alameda County Congestion
Management Agency (ACCMA) to satisfy the Land Use Analysis Program of the Alameda
County Congestion Management Program (CMP).
. Currently, all existing study intersections operate at acceptable levels of service.
· All study intersections are expected to continue to operate acceptably under Baseline
Conditions.
. All study intersections are expected to operate acceptably under Baseline Plus Project
Conditions.
. Under Buildout Conditions, the intersections of Dougherty RoadlDublin Boulevard and Santa
Rita Road/I-580 Eastbound Off-Ramp are expected to operate unacceptably during the PM
peak hour, as described below.
. The proposed Project alternative is expected to generate 143 AM peak-hour trips and 170
PM peak-hour trips. The Project alternative is expected to have the same impacts to
intersections, roadway segments, and freeway segments as the original proposed Project.
No additional traffic impact analysis of the Project alternative is required by ACCMA.
Cumulative Impacts and MitiQations
Required mitigation measures for Buildout and Buildout With Project Alternative Conditions, as
included in the Fallon Crossings report, are described below. All references to the "Project" include
the original proposed Project and the Project alternative. No additional mitigations are required as
part of the analysis for the Casamira Valley Project.
1. The Dougherty Road/Dublin Boulevard intersection would operate at LOS E (V/C = 0.93)
during the PM peak hour under Buildout Conditions (including the Project). This LOS
represents a significant cumulative impact.
Mitigation Measure 1. Improvements at the Dublin Boulevard/Dougherty Road
intersection are included in the Eastern Dublin Traffic Impact Fee (TIF) program. The
Project is required to make its fair share payment of impact fees for these
improvements.
The Project developer shall advance to the City applicable monies for acquisition of
right-of-way and construction of the improvements assumed in this study for the
intersection of Dublin Boulevard/Dougherty Road. The amount of money advanced to
the City shall be based on the developer's fair share of the deficit (spread over those
Projects that are required to make up the deficit) between funds available to the City
from Category 2 Eastern Dublin TIF funds and the estimated cost of acquiring the
Casamira Valley Residential Development
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July 17, 2006
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Kimley-Hom
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Conclusions
right-of-way and constructing the improvements. The City will provide credit for
Category 2 Eastern Dublin TIF to the developer for any advance of monies made for
the improvements planned for the Dublin Boulevard/Dougherty Road intersection.
Additional improvements to improve the LOS at the Dougherty Road/Dublin Boulevard
intersection to an acceptable level (LOS D or better) under Buildout Conditions would require
adding a fourth northbound left turn lane on Dougherty Road. Allowing four lanes of traffic to
perform a left turn movement simultaneously would raise major concerns regarding the safety
of such an operation. Moreover, additional improvements to reduce traffic impacts at this
intersection are not feasible given the physical constraints at the intersection. On a periodic
basis, the City should monitor the operations of Dougherty RoadlDublin Boulevard, as well as
other intersections at the 1-580 interchanges, during the PM peak hour. Level of service
analysis for this intersection should be updated as forecasted peak hour volumes become
available.
Therefore, the impact at the Dougherty Road/Dublin Boulevard intersection under Buildout
Conditions remains a significant cumulative impact.
2. The Santa Ritall-580 Eastbound Ramps intersection would operate at LOS E (V/C = 0.95)
during the PM peak hour under Buildout Conditions (including the Project). This LOS
represents a significant cumulative impact.
Adding a third left turn lane for the eastbound off-ramp approach at the intersection of Santa
Rita Roadll-580 Eastbound Ramps is expected to improve the intersection level of service to
LOS D during the PM peak hour under Buildout Conditions.
Mitigation Measure 2. The Project developer shall contribute a pro-rata share of the
cost to improve the intersection of Santa Rita Road/I-580 Eastbound Off-Ramp-Pimlico
Drive to include a third left-turn lane for the eastbound off-ramp approach at this
intersection and other downstream improvements including modifications to the
striping on the northbound lanes of the Tassajara Roadll-580 overpass to accept traffic
from the third left-turn lane and maintain three northbound through lanes at the
Tassajara Roadll-580 Westbound Ramps intersection.
The current Eastern Dublin TIF program does not include this improvement; however, the
program will be amended in 2006 to include this improvement. With this improvement, the
impact at the Santa Ritall-580 Eastbound Ramps intersection under Buildout Conditions will
be reduced to a less-than-significant level.
3. With the proposed Project traffic added to Year 2030 No Project mainline freeway volumes,
projected LOS on 1-580 and 1-680 would remain unchanged. However, with a projected LOS
F on various segments of 1-580 and 1-680, Project trips would be adding to an already
deficient condition. These specific segments would not meet the ACCMA monitoring
standard of LOS E during the AM or PM peak hour. This is considered a significant
cumulative impact.
Although efficiency improvements (such as HOV Lanes) and expanded public transportation
could be added in the 1-580 corridor, little or no additional freeway capacity for single-
occupant vehicles is planned. Actions to encourage alternative travel modes include
advocating HOV lanes on 1-580, extending BART to Livermore, implementing the 1-580 Smart
Corridor approach (including adaptive signal timing, transit priority systems, incident
management, and ramp metering), and supporting other major investments in transit. In
addition, the City of Dublin plans to construct the Dublin Boulevard extension to North
Canyons Parkway in Livermore as a six-lane parallel arterial that will provide additional lane
capacity along the 1-580 corridor.
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July 17, 2006
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Conclusions
Mitigation Measure 3. The Project is required to pay the Tri-Valley Transportation
Development (TVTD) Fee for its proportionate share of 1-580 and 1-680 improvements,
including HOV lanes, auxiliary lanes, and interchange improvements. The Project will
also pay its proportionate share toward public transportation improvements (e.g., West
Dublin BART Station and Express Bus Service from Livermore to East Dublin BART
Station) by payment of the TVTD Fee.
Even though the above improvements will ameliorate traffic conditions on 1-580 and 1-680 in
the Tri-Valley, they will not mitigate the contribution of projected traffic demand from the
Project on these freeways to a less-than-significant level. Therefore, the impact on the
freeway system of 1-580 and 1-680 in the Project area remains a significant, unavoidable
cumulative impact, and no additional impact beyond the analyses of the Eastern Dublin EIR
or subsequent supplemental EIRs is identified.
Recommended Proiect Improvements
The following sections present measures that are not required as CEQA mitigations, but will improve
the Project's circulation and access and assure compliance with applicable City design and operation
standards and policies. .
Off-Site Project Improvements
1. Based on traffic safety considerations, traffic signals should be installed to control traffic at
the two intersections providing access to and from the Project site.
2. Under Baseline Plus Project Conditions, for each northbound approach to intersections of
Tassajara Road/North Project Access Street and Tassajara Road/South Project Access
Street, one through lane and one exclusive 150-foot right-turn lane with a 90-foot taper
should be provided for Project traffic entering the site. For each southbound approach, one
through lane and an exclusive 150-foot left-turn lane with a 90-foot taper should be provided
for Project traffic entering the site. Each westbound approach should have an exclusive left-
turn lane and an exclusive 150-foot right-turn lane with a 90-foot taper for Project traffic
exiting the site. Each intersection should be controlled with a protected southbound left-turn
phase.
3. The traffic signals at the two Project access intersections should be coordinated to optimize
traffic flow in the Project area. If possible, these intersections should be coordinated with the
future intersection of Tassajara Road/Fallon Road.
4. According to the site plan, the two Project access intersections are approximately 625 feet
apart, shorter than the minimum 750-foot spacing between signalized intersections desired
by the City. The proposed spacing of these intersections should be increased closer to 750
feet if topographical restrictions permit.
5. The projected average daily traffic (ADT) for the segment of Tassajara Road between Fallon
Road and the County Limit is 13,760 vehicles per day (vpd) and 13,860 vpd under Baseline
Plus Project Conditions and Baseline Plus Project Alternative Conditions, respectively.
These volumes approach the 15,000 vpd maximum threshold standard for two-lane
roadways. Because the Casamira Valley Project is directly adjacent to this roadway segment
and will contribute to the projected ADT on this segment, the Casarnira Valley Project should
construct this widening.
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July 17, 2006
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Conclusions
6. The projected ADT for the segment of Tassajara Road between Northern Access for Dublin
Ranch West and Fallon Road is 14,610 vpd and 14,690 vpd under Baseline Plus Project
Conditions and Baseline Plus Project Alternative Conditions, respectively. These volumes
approach the 15,000 vpd maximum threshold standard for two-lane roadways. The Fallon
Crossings report recommended that the Fallon Crossings developers widen this roadway
segment from two lanes to four lanes. Because the Casamira Valley Project will contribute to
the projected ADT on this segment, the Casamira Valley Project should construct this
widening in the event that this Project or Project Alternative is developed prior to the Fallon
Crossings Project.
7. The projected ADT for the segment of Tassajara Road between North Dublin Ranch Drive
and Northern Access for Dublin Ranch West is 18,630 vpd under Baseline Conditions. The
projected ADT is 20,100 vpd and 20,180 vpd under Baseline Plus Project Conditions and
Baseline Plus Project Alternative Conditions, respectively. These volumes exceed the
15,000 vpd maximum threshold standard for two-lane roadways. The Dublin Ranch West
report recommended that the Dublin Ranch West developers widen this roadway segment
from two lanes to four lanes. Because the Casamira Valley Project will contribute to the
projected ADT on this segment, the Casamira Valley Project should construct this widening in
the event that this Project or Project Alternative is developed prior to the Dublin Ranch West
Project.
On-Site Project Improvements
1. If bicycle lanes are placed on streets, chokers should be designed to allow bicyclists to pass
unencumbered. Signage reading "Driveways Ahead" may be posted in advance of houses to
alert drivers of driveways to serve as another means to help reduce vehicle speeds and
increase safety.
2. If speeding is observed along the Project access roads, additional traffic calming measures to
the chokers could help maintain appropriate speeds. Narrowing the travel lanes to 11 feet
could help reduce travel speeds.
3. Seventeen homes (Lots 1-17) will front North Project Access Street before the first connector
street between North Project Access Street and South Project Access Street. Seven homes
(Lots 18-24) will front South Project Access Street before this first connector street. These
homes will be situated on horizontal and vertical curves that may reduce stopping sight
distance to driveways. Minimum sight distances and other roadway geometry issues should
be provided based on the City's design standards and verified during the review process.
4. The minimum distance between all driveways should be 20 feet to allow for one parking
space.
The annexation request for the proposed Project includes the Moller property and additional property
adjacent to the west (Tipper and Vargas properties). The Dublin Travel Demand Model used to
estimate traffic conditions in the study area under Year 2025 Buildout Conditions included trips
generated by the Tipper and Vargas properties in accordance with the City of Dublin General Plan.
As such, traffic impacts associated with the annexation Project included future development of all
three properties that will be subject to the annexation (Moller, Tipper, and Vargas properties).
Therefore, no additional traffic impacts or mitigations are required for the annexation Project beyond
those described in this study for the Casamira Valley Project.
Casamira Valley Residential Development
Final TrajJic Report
July 17, 2006
Page 48
~=~
Kimley-Hom
and Associates, Inc.
ApPENDIX A - LEVEL OF SERVICE METHODOLOGY
SOURCE: TJKM TRANSPORTATION CONSULTANTS. "A TRAFFIC STUDY FOR THE
PROPOSED FALLON CROSSINGS DEVELOPMENT." SEPTEMBER 28, 2005.
" i
DESCRIPTION OF INTERSECTION CAPACITY ANALYSIS
CCTA SIGNAUZED METHODqLOGY
1
I
'. I
Background
,
,
The CerA intersection capacity analysis methodology is described in detail in the Technical
Procedures Manual of the CCfA, January, 199t It is identical to the Circular 212 Planning
metbodologyexcept that the lane capacity has been increl!sed from 1500 vph to between 1650 to
1800 vph based on saturation flow measurements taken at four intersections in Contra. Costa
County. (See following Table 9 from the Technical Procedures Manual.)
On average, saturation flow rates for left-turn lanes were <lVer ten percent lower than for through
lanes. However, insufficient data was collected to provide statistical accuracy for the averages.
Thus, saturation flow rates for through lanes are equal to those for turn lanes.
This methodology determines the critical movement for each phase of traffic. It then sums the
critical volume-to-capacity ratio by phase to detennine the intersection volume-to-capacity ratio.
Circular 212, on the other hand, sums the critical movement volumes themselves and compares
them.to the total capacity of the intersection to determine, in effect, the vo1ume-to-capacity ratio
of the intersection as a whole. .
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Level of Service
The volume-to-capacity ratio is re1atedto level of service (LOS). The following level of service
for Signalized Intersections depicts the relationship between the volUJil~to-capacity ratio and level
of service. An intersection operating at capacity would operate at LOS E. Level of Service F is
not possible for existing conditions, but can be forecasted for future conditions when volume
projections exceed existing capacities.
..., j
Input Data
t i
The intelSec1ion capacity worle sheets use a code to identify different lane configurations. This
nomenclature is described on the following Description of Lane Configurations. Right turn on
red adjustments are aCcounted for as well as unequal distrlbution of turn volumes in double turn
lanes. For more infonnation, seeQrcular 212 and the CCfA Technical Procedures Manual.
"-( J
LEVEL OF SERVICE RANGES
Lj
VOLUME TO MAXIMUM SUM OF CRITICAL VOLUMES
LOS CAPACITY RATIO 2-Phase , 3-Phase 4+-Phase
A ~ O~60 1,080 1,030 990
B 0.61 - 0.70 1,260 1,200 1,160
C 0.71 - 0.80 1,440 1,380 1,320
D 0.81 - 0.90 1,620 1,550 1,490
0.91 - 1.00 1,800 1,720 . 1,650
E
F -----------Not Applicable----------
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Source: Contra Costa COIUltyGrOwth Management Program, Teclmical Procedures, Table 9.
cctavc.app
. I
DESCRIPTION OF LANE CONFIGURA.TION FORMAT
The nmnberof lanes and the use of the lanes Is denoted with a special nomenclature described below: .
Lane Nomenclature
X. Y . Where X Denotes the total number of lanes available fon particular movement.
Y Denotes how the lanes are used. .
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I'~
0 1.011. . A lane used exclusively for a particular movement (i.e. exclusive left-turn lane).
_ I.OT
1.0 L
P - .
I'~ A lane which is shared. that is, either of two different movements can be made
. .
1 1.111. from a particular lane (i.e. a lane which is shared by through and right-turn
~. 2J T
1.0 L traffic) .
II
"~ Denotes two or more through lanes in which two lanes are shared, one with
2 :l':. . ~;
1.1 L . left-turit traffic, the other with right-turn traffic.
I:
3 Denotes an expressway throughmQvement.
I'~
' .
'. "=".- ~ ~ Denotes a right-tmn movement from a wide outside lane where right-tuIn . .
4
. I 1.0 L vehicles can bypass through traffic sharing the iane to make a right-turn on red.
" .
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5 ~- 2.0 T
.- . right-turn arrow and prohibition on the conflicting U.turn movement.
.. 1JI L
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I'~ Denotes a right-turn movement from a shared lane with a right.turn arrow and
6 ...1.611.
-...UT
- l.oL prohibition on the conflicitng U-turn movement.
I: .
7,8,9 Denotes a turning movement which haS a separate lane to turn into. as shown
below: .
It'f)~_ 1.7 It Turn lane which is shared with a through lane orleft.turn lane and under signal
7 2.1 T control, and which has its own lane to turn itito. There must be at least two
It:t 1.0 L through lanes.
Il't~ '.
1.811. Exclusive turn lane which is under signal control. an,d which has its own lane
8 ~. 2.0 T
It:t loOL to turn into; ,
It:t~_ ~: Exclusive turn lane not under signal control and which has an exclusive lane to
9 tU,l1 into, often referred to as a "free" turn. Since the volumes in this lane do not
1.0 l. conflict with other intersection movements, the V IC ratio of the free right.tum
I t:t movemen t is not included in the sum of critical V IC ratios.
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PART A. TWO-WAY STOP-CONTROLLED INTERSECTIONS
I. INTRODUCTION - PART A
In this section a methodology for analyzing capacity and level of service of two-way
stop-controlled (TWSC) intersections is presented.
II. METHODOLOGY- PART A
Capacity analysis at TWSC intersections depends on a clear description and
understanding of the interaction of drivers on the minor or stop-controlled approach with
drivers on the major street. Both gap acceptance and empirical models have been
developed to describe this interaction. Procedures described in this chapter rely on a gap
acceptance model developed and refined' in Germany (1). The concepts from this model
are described in Chapter 10. Exhibit 17-1 illustrates input to and the basic computation
order of the method described in this chapter.
LEVEL-OF-SERVicE CRITERIA
Level of service (LOS) for a TWSC intersection is determined by the computed or
measured control delay and is defined for each minor movement. LOS is not defined for
the intersection as a whole. LOS criteria are given in Exhibit 17-2.
. Both theoretical and empirical
approaches have been used
to arrive at a methodology
LOS is not defined for the
overall intersection
Highway Capacity Manual 2000
The LOS criteria for TWSC intersections are somewhat different froin the criteria
used in Chapter 1'6 for signalized intersections primarily because different transportation
facilities create different driver perceptions. The expectation is that a signalized .
intersection is designed to carry higher traffic volumes and experience greater delay than
an unsignalized intersection.
LOS thresholds differ from
those for signalized
intersections to reflect
different driver expectations
Highway Capacity Manual 2000
EXHIBIT 17-1. TWSC UNSIGNALIZED INTERSECTION METHODOLOGY
Input
- Geometric data
- Hourly turning mowmeot volumes
- HllaVt vehicle percentages
-Pedestriandata
- UpslIllam sl nal data
Compute pap times
- Critical gap times
- follow-up times
Adjust potential capaclty and compute mCMlment capacity
- Impedance effects . .
- Shared-lane operation
- Effects of upstream signals
- Two-stage gap acceptance process
- Aared minor-street approaches
Compute Queue lengths
J
Compute control delays
EXHIBIT 17-2. LEVEL-Of-SERVICE CRITERIA fOR TWSC INTERSECTIONS
Level of Service Average Control Delay (s!veh)
A ~10
B >1~15
C > 15-25
D > 25-35
E > 35-50
F >W
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Chapter 17 - Unsignalized Intersectlons
Methodology. TWSe intersections
17-2
.......-J_ -.... Kimley-Hom
-......J ~ and Associates, Inc.
ApPENDIX B - LEVEL OF SERVICE WORKSHEETS:
EXISTING CONDITIONS
SOURCE: T JKM TRANSPORTATION CONSULTANTS. "A TRAFFIC STUDY FOR THE
PROPOSED FALLON CROSSINGS DEVELOPMENT." SEPTEMBER 28, 2005.
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Two-Way Stop Control
Page I '
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.
TWO-WAY STOP CONTROL SUMMARY
General Information ' Site Information
.
~alyst Arun Intersection 10. EI Charro/l-580 EB
~aencv/Co. TJKM Ramps
rTurisdiction City of Dublin
Date Performed 5/4/2005 nalvsis Year 2005 I
:t\nalysis Time Period lAM Peak !
Proiect ID 157-189 ,
EastlWest Street: 1-580 EB RamDs North/South Street: EI ChafTO
Intersection Orientation: North-South IStudv Period (hrs); 0.25
Vehicle Volumes and Adlustments
Malor Street Northbound Southbound
Movement 1 2 3 4 5 6
L T R l T R i
!Volume 0 36 14 39 6 0
Peak-Hour Factor, PHF 0.90 0.90 0.90 0.90 0.90 0.90
Hourly Flow Rate, HFR , 0 40 15 43 6 0 1
Percent Heaw Vehicles 0 - - 0 - - I
Median Type UndMded
RT Channelized , 0 0
Lanes 0 1 1 0 1 0
Configuration T , R LT
Upstream Sriinal 0 0 I
Minor Street ' Westbound Eastbound
Movement 7 8 9 10 11 12
L T R L T R I
Volume 0 0 0 47 4 50 I
Peak-Hour Factor, PHF 0.90 0.90 0.90 0.90 0.90 0.90
Hourlv Flow Rate, HFR 0 0 0 52 4 55
Percent Heaw Vehicles 0 0 0 0 0 0 1
Percent Grade (%) 0 0
Flared Approach N N -,
Storage 0 0 1
RT Channelized 0 0
Lanes 0 0 , 0 0 1 1
Configuration LT R
Delav. Queue Lenoth and Level of Service ~
Approach N8 S8 Westbound Eastbound 1
Movement 1 4 7 8 9 10 11 12
Lane Configuration LT LT R
v (vph) 43 56 55
C (m) (vph) 1563 825 1083
v/c 0.03 0.07 0,05
95% queue length 0.08 0.22 0,16
Control Delay 7.4 9.7 8,5
LOS A A A
f6.pproach Delay - - 9.1
lA.pproach LOS - - A
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Versior,4.l i
file:I/C:\Documents%20and%20Settinl!s\l'lfJl'li~ncirl'ln TWM\ TAt''' 101.. ")nQof+;~ MI'T"___I...... I_Ar
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Two- Way Stop Control
Page I of2
. ~O.WAYSTOPCONTROLSUMMARY
lGenerallnformatlon Site Information
~nalyst 14ron ntersection 10. EI Chsrrol/-580 EB
Ramos
~aencY/Co. TJKM . I'urisdlctlon Citv of Dublin
Date Performed 5/4/2005 nalysis.y ear 2005
Analvsls Time Period PM Peak Project ID 157-189
EastlWest Street: 1.580 EB Ramos North/South Street: EI Charro ,
Intersection Orientation: North-South Study Period (hrs): 0.25
Vehicle Volumes and Adjustments .
. Malar Street Northbound . Southbound
Movement 1 2 3 4 5 6
L T R L T R
. !Volume 0 12 15 575 8 0
Peak-Hour Factor, PHF 0.90 0.90 0.90 0.90 0.90 0.90
Hourly Flow Rate, HFR 0 13 16 638 . 8 0
Percent Heavv Vehicles 0 - - 0 - -
Median Type . . Undivided.
RT Channelized 0 0
Lanes 0 1 1 0 1 0
Configuration T R . . LT
Upstream Sianal 0 0
Minor Street Westbound Eastbound
MGvement 7 8 9 10 11 12 .
L T R L . T R
Volume 0 0 0 5 ... 11 40
Peak-Hour Factor, PHF 0.90 0.90 . 0.90 0.90 0.90 0.90
Hourly Flow Rate, HFR 0 0 0 5 12 44
Percent Heavv Vehicles. . 0 0 0 0 0 . 0
Percent Grade (%) 0 0
Flared Approach N N
Storage 0 0
RT Channelized 0 0
Lanes 0 0 0 0 1 1
Confiauration ... LT R
Delay. Queue Lenath and Level of Service
fA.pproach . . N8 S8 Westbound . Eastbound
Movement 1 4 7 8 9 10 . 11 r 12
Lane Configuration LT LT R
Iv (vph) 638 17 44
C (rn) (vph) 1597 99 1080
v/c 0.40 0.17 0.04
95% queue length 1.96 0.59 0.13
Control Delay 8.7 48.8 8.5
LOS A I E A
Approach Delay - .. 19.7
Approach LOS - - C
Copyright (:I 2000 University of Florida; All Rights Reserved
Version 4.1
Two-Way Stop Control'
Page 1 of2
~
TWO-WAY STOP CONTROL SUMMARY I !
,
General Information Site Information
IAnalyst Arun Intersection 11. Fallon/l-580 we ,
RamDs
IlAQency/Co. TJKM 'urisdiction Citv of Dublin
,
Date Performed 5/4/2005 nalysis Year 2005
tvlalysis Time Period AM Peak Project 10 157-189
EastlWest Street: '-580 we RamDs North/South Street Fallon
Intersection Orientation: North-South StudY Period (hrs): 0.25
Vehicle Volumes and Adiustments "
Malor Street Northbound Southbound
Movement 1 2 3 4 5 6
L T R L T R
Volume 86 9 0 0 11 98
Peak-Hour Factor, PHF 0.90 0.90 0.90 0.90 0.90 0.90
Hourly Flow Rate, HFR 95 10 0 0 12 108
Percent Heavy Vehicles 0 - - 0 - -
Median Type Undivided
RT Channelized 0 0
Lanes 0 1 0 0 1 0
ConfiQuration LT TR
Uostream Sienal 0 0
Minor Street Westbound Eastbound
Movement 7 8 9 10 11 12
L T R L T R
Volume 28 10 50 0 0 0
Peak-Hour Factor, PHF 0.90 0.90 0,90 0.90 0.90 0.90
Hourly Flow Rate, HFR 31 11 55 0 0 0
Percent Heavy Vehicles 0 0 0 0 0 0
Percent Grade (%) 0 0
Flared Approach .N N
Storage 0 0
RT Channelized 0 0
Lanes 0 1 1 0 0 0
Configuration LT R .
Delay. Queue Lenath and Level of ServIce .
pproach NB S8 Westbound Eastbound
Movement 1 4 7 8 9 10 11 12
Lane Configuration LT LT R
" (vph) 95 42 55
C (m) (vph) 1480 644 1077
v/c 0,06 0.07 0.05
95% queue length 0.21 0,21 0.16 .
Control Delay 7.6 11,0 8.5
LOS A . B A
Approach Delay 9.6 "
- -
Approach LOS - - A
Copyright 0 2000 University oi Fiorida, All Rights Reserved version 4
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Two~Way Stop Control
Page 1 of2
~O.WAYSTOPCONTROLSUMMARY .
Gene.rallnformatlon Site Information
Analyst Arun Intersection 11. Fal/on/l-580 WB
Agency/co. TJKM , RamDs
',lJrlsdlction CItv of Dub/In
DatEIPerfonned 514/2005 alvslsYear 2005,
A.halysls Time Period PM Peak RrolectlO 157...189
." "
EastlWest Street '-,580 WB, Ramps North/South 'Street: FIJI/on
InterseCtion Orientation: North~So/.lth StudyPerlodlhrj): 0.25
Vehicle Volumes and Adiustlllents
Malor Street Northbound Southbound'
Moyement 1 2 3 4 5 6
, L T R L T R
volume 12 10 0 0 594 69
Peak-Hour Factor, PHF 0.90 0.90 0.90 0.90 0.90 0.90
Hourly Flow Rate, HFR 13 11. 0 0 660 76
Percent Heavy Vehicles o. - - 0 - -
Median Type , Undivided
RT Channelized 0 0
Lanes 0 1 0 0 1 0
Configuration LT TR
Uostream Sional 0 0
Minor Street Westbound , . Eastbound
Movement 7 8 9 10 11 12
L T R L T R
!Volume 5 0 33 0 0 0
Peak-Hour Factor, PHF 0.90 0.90 , 0.90 0.90 0.90 0.90
Hourly Flow Rate, HFR 5 0 , 36 0 0 0
Percent Heavy Vehicles 0 0 0 0 0 0
Percent Grade (%) 0 0
Flared Approach N N
Storage 0 0
RT Channelized 0 0
Lanes , 0 1 1 0 0 0
Configuration LT R
Delav. Queue Lenath and Level of Service
Approach N8 S8 Westbound Eastbound
Movement 1 4 7 8 9 10 11 12
Lane Configuration LT LT R
v (vph) 13 5 36
C (m) (vph) 879 384 1076
v/c 0.01 0.01 0.03
95% queue length 0.05 0.04 0.10
Control Delay 9.2 14.5 8.5
Los A B A
lI.pproach Delay - - 9.2 ,
'\pproach LOS - - A
Copyright C 2000 Univemity of Florida, All Rights Reserved
Version 4.1
~-.... Kimley-Hom
~- ~ and Associates, Inc.
ApPENDIX C - LIST OF ApPROVED, PENDING PROJECTS,
AND BUILDOUT PROJECTS, LANE GEOMETRY AND CONTROL
ASSUMPTIONS, AND TURNING MOVEMENT VOLUMES
i
I,
I:
TABLE C1: APPROVED PROJECTS IN DUBLIN (As of December 2005)
ITE % Unoccupied Rates Tolal Trips . % Pass.sy Net New Trips
Traffix Land Use Size 1 Units PM Oallv AM PM Saturdav Dally Traffic2 AM PM Saturday Dallv
Development Name Code Occupied Size AM Saturdav
Zone In Out In Out In Out In Out In Out In Out In Out In Out AM PM Sat In Out In Out In Out In Out
113 Blael< Mountain Sinale Familv Residential' 210 7 29% 5 d.u. 0.19 0.56 0.65 0.36 0.51 0.43 4.79 4.79 1 3 3 2 3 2 24 24 1 3 3 2 3 2 24 24
114 Braddock and Loaan: EDPO Slnole Familv Residential' 210 1076 0% 1078 d.u. 0.18 0.53 0.54 0.31 0.46 0.41 4.29 4.29 191 573 565 329 522 444 4620 4620 191 573 585 329 522 444 4620 4620
4 Chacon Dental Office ' 720 5.00 0% 5.00 ksf 1.94 0.49 0.99 2.67 2.07 1.56 18.07 18.07 10 2 5 13 10 8 90 90 10 2 5 13 10 8 90 90
29 Dublin Ranch A 18-HoIe Golf Course 430 18 100% 0 holes 1.75 0.47 1.21 1.53 2.25 2.34 17.87 17.87 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
42 Dublin Ranch A-I Sinale Famliv Residential' 210 110 67% 36 d.u. 0.20 0.59 0.68 0.38 0.53 0.45 5.14 5.14 6 19 22 12 17 15 167 167 6 19 22 12 17 15 167 167
43 Dublin Ranch A-2 Sinale Famllv Residential' 210 51 63% 19 d.u. 0.22 0.66 0.73 0.41 0.60 0.51 5.47 5.47 4 11 13 7 10 9 94 . 94 4 11 13 7 10 9 94 94
44 Dublin Ranch A-3 Sinale Famllv Residential' 210 83 31% 57 d.u. 0.20 0.61 0.70 0.39 0.55 0.47 5.26 5.26 10 31 38 20 28 24 270 .270 10 31 38 20 28 24 270 270
45 Dublin Ranch A-4 Sinale Famllv Residential' 210 56 24% 42 d.u. 0.22 0.65 0.73 0.41 0.59 0.50 5.44 5.44 8 25 28 16 22 19 206 206 8 25 28 16 22 19 206 206
46 Dublin Ranch A-5 Single Family Residential' 210 62 47% 33 d.u. 0.21 0.64 0.72 0.41 0.57 0.49 5.39 5.39 6 19 21 12 17 15 160 160 6 19 21 12 17 15 160 160
1001 Fairway Parcell B Hl-H2 Senior Aoartment ~ 253 325 0% 325 d.u. 0.12 0.26 0.28 0.16 0.15 0.15 1.74 1.74 39 85 91 52 49 49 sse 566 39 85 91 52 49 49 sse sse
1002 Fairway Parcel 2 B Hl-H2 Familv Aoartment ~ 220 304 0% 304 d.u. 0.08 0.43 0.42 0.20 0.28 0.26 3.32 3.32 24 131 128 61 79 79 1008 1008 24 131 128 61 79 79 1008 1008
1003 Fairway Parcel 3 B Hl-H2 Condo = 220 304 0% 304 d.u. 0.08 0.43 0.42 0.20 0.26 0.26 3.32 3.32 24 131 126 61 79 79 1008 1008 24 131 128 61 79 79 1006 1008
38 Dublin Ranch G Cottaoes MH.l 230 200 68% 64 d.u. 0.07 0.37 0.36 0.18 0.25 0.22 2.93 2.93 4 21 21 10 14 13 169 169 4 21 21 10 14 13 169 169
38 Dublin Ranch G Courtvaros MH.2 230 281 48% 146 d.u. 0.07 0.37 0.36 0.18 0.25 0.22 2.93 2.93 9 49 47 24 33 29 385 385 9 49 47 24 33 29 385 385
38 Dublin Ranch G VUlasH-l 230 289 50% 145 d.u. 0.07 0.37 0.36 0.18 0.25 0.22 2.93 2.93 9 45 47 23 33 29 382 .382 9 48 47 23 33 29 382 382
38 Dublin Ranch G Terraces H-2 230 626 22% 458 d.u. 0.07 0.37 0.36 0.18 0.25 0.22 2.93 2.93 31 163 158 79 110 97 1287 1287 31 163 158 79 110 97 1287 1287
38 Dublin Ranch G Neiohborhood Park NA 5.60 0% 5.60 acres 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
22 .' Dublin Ranch L-6 Single Family Residential' 210 117 69% 36 d.u. 0.20 0.59 0.68 0.38 0.53 0.45 5.12 5.12 6 19 22 12 17 15 166 166 6 19 22 12 17 15 166 166
19 Emerald Glen Pointe Research and Develooment Center' 760 677.76 55% 304.99 ksf 0.89 0.18 0.14 0.82 0.13 0.11 3.65 3.65 271 56 44 250 40 34 1113 1113 271 56 44 250 40 34 1113 1113
18 Greenbriar Phase 1 Sinale Famllv Residential' 210 126 94% 8 d.u. 0.19 0.58 0.87 0.38 0.53 0.45 5.09 5.09 2 5 5 3 4 4 41 41 2 5 5 3 4 4 41 41
18 Greenbriar Phase 3 Sinale Familv Residential' 210 108 0% 108 d.u. 0.20 0.59 0.68 0.38 0.53 0.45 5.15 5.15 21 64 74 41 58 49 556 556 21 64 74 41 58 49 556 558
18 Greenbriar Phase 5 Sinole Family Residential' 210 1 0% 1 d.u. 0.19 0.56 0.85 0.36 0.51 0.43 4.79 4.79 0 1 1 0 1 0 5 s 0 1 1 0 1 0 5 5
1 Palace Auto Auto Dealership' 841 11.33 0% 11.33 ksf 1.61 0.60 1.12 1.68 1.51 1.46 18.75 18.75 18 7 13 19 17 17 212 212 34 26 18 7 8 14 13 13 176 176
11 Pinn Brothers (Silveria) Sinale Familv Residential 22 210 79 0% 79 d.u. 0.19 0.56 0.65 0.36 0.51 0.43 4.79 4.79 15 44 51 28 40 34 378 378 15 44 51 28 40 34 378 378
11 PiM Brothers (Silveria) Ouster Homes" 210 73 0% 73 d.u. 0.19 0.56 0.65 0.36 0.51 0.43 4.79 4.79 14 41 47 26 37 31 350 .350 14 41 47 26 37 31 350 350
11 PiM Brothers (Silveria) Condominiums " 230 102 0% 102 d.u. 0.07 0.36 0.36 0.18 0.25 0.22 2.93 2.93 7 37 37 18 26 22 299 299 7 37 37 18 26 22 299 299
121 Senior Center Multi-Famllv Residential' 220 54 0% 54 d.u. 0.09 0.47 0.60 0.29 0.40 0.40 4.24 4.24 5 25 32 16 22 22 229 229 5 25 32 16 22 22 229 229
109 Valley Center Retail 3.11 814 5.00 0% 5.00 ksf 1.75 1.62 1.11 1.45 2.17 2.01 20.34 20.34 9 8 6 7 11 10 102 102 34 26 9 8 4 5 8 7 85 85
109 Valley Center Office 3 710 3.00 0% 3.00 ksf 1.37 0.19 0.25 1.24 0.22 0.19 5.51 5.51 4 1 1 4 1 1 17 17 4 1 1 4 1 1 17 17
129 Valley Christian Center Jr.lSr. Hioh School. Administration 3.21 530 200 0% 200 ouoils 0.32 0.14 0.06 0.09 0.09 0.03 0.90 0.90 64 28 12 18 18 6 180 180 64 28 12 18 18 6 180 180
129 Valley Christian Center Senior Center, Counselina (Church) 3.2 560 30.00 0% 30.00 ksf 0.39 0.33 0.36 0.30 2.41 0.85 4.56 4.56 12 10 11 9 72 26 137 137 12 10 11 9 72 26 137 137
129 Valley Christian Center Staff Expansion 27 NA 10 0% 10 emp. NA NA NA NA NA NA NA NA 10 0 0 10 0 0 10 10 10 0 0 10 0 0 10 10
121 Enea Village Parkway RetailJ.11 814 8.53 0% 8.53 ksf 1.75 1.62 1.11 1.48 2.17 2.01 20.34 20.34 15 14 9 13 19 17 173 173 34 26 15 14 5 9 14 12 144 144
121 Enea Village Parkway OfficeJ 710 5.58 0% 5.58 ksf 1.37 0.19 0.25 1.24 0.22 0.19 5.51 5.51 8 1 1 7 1 1 31 31 8 1 1 7 1 1 31 31
25 auanv Lane School K_123.26 521 750 0% 750 pupils 0.55 0.37 0.08 0.12 0.09 0.03 0.90 0.90 413 278 60 90 68 23 675 675 413 278 60 90 68 23 675 675
1005 IKEA15 IKEA NA 1.00 0% 1 Location 22.VU 24.00 200.0 224.0 733.0 795.0 2759 2759 22 24 200 224 733 795 2759 2759 22 24 128 152 733 795 2759 2759
129 Bancor Pak n Save ITwnhm' Townhouse 13 231 110 0% 110 d.u. 0.17 0.50 0.5 0.4 0.4 0.3 3 3 18 54 52 39 43 36 322 322 18 54 52 39 43 36 322 322
129 Bancor Pak n Save lAots\ Multi-Familv Residential13 220 130 0% 130 d.u. 0.08 0.43 0.4 0.2 0.3 0.3 3 3 11 56 54 27 34 34 431 431 11 56 54 27 34 34 431 431
129 Bancor Prol 8909 San Ramon Townhouse 14 231 55 0% 55 d.u. 0.17 0.50 0.47 0.36 0.39 0.33 2.93 2.93 9 27 26 20 21 18 161 161 9 27 26 20 21 18 161 161
125 Hall of Justice Courthouse NA 13 0% 13 rms Rates not aoollcable. Net new trios obtained from Courn EIR. 582 128 170 540 0 0 2969 2969 582 128 170 540 0 0 2969 2969
15 KolI Dublin Corp Center Ph. 2 OfficeS 710 179.85 0% 179.85 ksf 1.48 0.20 0.27 1.30 0.18 0.16 5.79 5.79 252 36 48 233 33 28 1041 1041 262 36 48 233 33 28 1041 1041
32/50 Dublin Ranch B Med Medium-Hiah Residential 6 220 262 0% 262 d.u. 0.08 0.43 0.44 0.21 0.26 0.26 3.39 3.39 19 101 104 50 61 61 799 799 19 101 104 50 61 61 799 799
50 Dublin Ranch BMH Medium-Hiah Residential 6 220 172 0% 172 d.u. 0.08 0.43 0.44 0.21 0.26 0.26 3.39 3.39 13 67 67 33 40 40 524 524 13 67 67 33 35 35 524 524
36/37 Dublin Ranch F Medium-HiQh Residential 6 220 630 0% 630 d.u. 0.08 0.42 0.38 0.19 0.26 0.26 3.10 3.10 46 239 217 107 147 147 1760 1760. 46 239 217 107 79 79 1760 1760
36/37 Dublin Ranch F Medium-Hioh Residential' 220 420 0% 420 d.u. 0.08 0.42 0.39 0.19 0.26 0.26 3.16 3.16 31 160 148 73 98 98 1193 1193 31 160 148 73 68 68 1193 1193
26 Dublin Ranch F Middle School' 522 1200 0% ouoils 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
27 Dublin Ranch F-l Multi-Familv Residential 6 220 119 0% 119 d.u. 0.08 0.44 0.47 0.23 0.29 0.29 3.56 3.56 10 52 56 27 34 34 424 424 10 52 56 27 31 31 424 424
28 Dubtin Ranch F-2 Sinole Familv Residential 6 220 121 0% 121 d.u. 0.19 0.58 0.67 0.38 0.53 0.45 5.10 5.10 21 64 73 41 57 49 556 556 21 64 73 41 57 49 556 556
126 Dublin Ranch West (Wallis) SillQle Familv Residential 28 210 75 0% 75 d.u. 0.19 0.56 0.65 0.36 0.51 0.43 4.79 4.79 14 42 49 27 38 32 359 359 14 42 49 27 38 32 359 359
126 Dubiin Ranch West (Wallis' Single Familv Resldentia' .. 210 557 0% 557 d.u. 0.19 0.58 0.65 0.36 0.51 0.43 4.79 4.79 106 312 362 201 284 240 2668 2668 106 312 362 201 284 240 2668 2668
126 Dublin Ranch West (Wallis' Multi-Familv Residential 28 220 178 0% 178 d.u. 0.08 0.43 0.42 0.20 0.26 0.26 3.32 3.32 14 77 75 36 46 46 591 591 14 77 75 36 46 46 591 591
126 Dublin Ranch West (Wallis' Multi-FamilvResidential 28 220 224 0% 224 d.u. 0.08 0.43 0.42 0.20 0.26 0.26 3.32 3.32 18 96 94 45 58 58 744 744 18 96 94 45 58 66 744 744
4 Dublin Transit Center Aoartments29 220 265 0% 265 d.u. 0.08 0.43 0.42 0.20 0.26 0.26 3.32 3.32 21 114 111 53 69 69 880 880 21 114 111 53 69 69 880 880
4 EAH Trans~ Center Medium-HiQh Residential 6 220 112 0% 112 d.u. 0.08 0.44 0.47 0.23 0.26 0.26 3.60 3.60 8 45 48 24 26 26 362 362 8 45 48 24 26 26 362 36'
4 Avalon Bay Transit Center Medium-High Residential' 220 305 0% 305 d.u. 0.08 0.43 0.40 0.20 0.26 0.26 3.22 3.22 22 117 111 55 71 71 883 883 22 117 111 55 71 71 883 883
4 O.R. Horton Transit Center Medium-High Residential 6 220 257 0% 257 d.u. 0.08 0.43 0.41 0.20 0.26 0.26 3.26 3.26 19 99 95 47 60 60 754 754 19 99 95 47 60 60 754 754
5 W. Leaacv/AMB Ollice Ollice' 710 150.5 0% 150.5 ksf 1.48 0.20 0.27 1.30 0.18 0.16 5.79 5.79 262 36 48 233 33 28 1041 1041 262 36 48 233 33 28 1041 1041
5 W. Leoacv/AMB Aoartments Medium-Hiah Residential 6 220 304 0% 304 d.u. 0.08 0.43 0.40 0.20 0.26 0.26 3.22 3.22 22 117 110 54 71 71 880 880 22 117 110 54 55 55 880 880
21 Marrio! Hotel SltefTrumark Retail 3,11 814 45 0% 45 ksf 1.75 1.62 1.11 1.48 2.17 2.01 20.34 20.34 79 73 50 67 98 90 915 915 34 26 79 73 30 47 74 66 759 759
113 Schaefer Ranch Single Family Residential 210 302 0% 302 d.u. 0.18 0.55 0.62 0.35 0.50 0.42 4.74 4.74 55 166 186 105 150 128 1433 1433 55 166 186 105 150 128 1433 1433
Tolal lolal 2954 4252 4314 3654 3783 3483 39559 39559 2954 4252 4210 3550 3625 3324 39321 39321
Land Use Database_Update_060506.xls
Source: T JKM Transportation Consultants, "A Traffic Study for the Proposed Fallon Crossings Development," September 28, 2005, and Updates by City Staff.
Table Cl. Approved Projects
TABLE C2: PENDING PROJECTS IN DUBLIN (As of December 2005)
Trafflx ITE Rates Total Trips % Pass-Sy Net New Trips
Development Name Land Use Size' Units Traffic' .
Zone Code AM PM Saturday Dally AM PM Saturday Dally AM PM Saturday Dally
In Out In Out In Out In Out In Out In Out In Out In Out AM PM Sat In Out In Out In Out In Out
115 Armv Residential Multi-Family Residential 220 114 d.u. 0.08 0.44 0.47 0.23 0.29 0.29 3.59 3.59 10 50 54 27 33 33 409 409 10 50 54 27 33 33 409 409
119 Dolan Lumber Auto Dealership (47 Stalls)' 841 70.00 ksf 1.61 0.60 1.12 1.68 1.51 1.46 18.75 18.75 113 42 78 118 106 102 1313 1313 34 26 113 42 45 85 79 75 1090 1090
3RJ37 Dublin Ranch F PUbllclSemi-Pubic 7," 560 37.64 !<sf 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
3RJ37 Dubin Ranch F Single Family ResIdential (Low) . 210 196 d.u. 0.19 0.56 0.64 0.36 0.51 0.43 4.91 4.91 33 99 113 64 90 76 866 866 33 99 113 64 90 76 866 866
4 DubRn Trans11 Center BART Parking Structure "" NA 1680 I oko spes No additional trios. rkina sIrUdure to reoIlC9 the 1,680 exIstino surface III rkino lot s t8C9S for the BART station. . 0 0 0 0 0 0 0 0
20 GM Auto Man B Expansion Auto Service . 840 23.15 ksf 1.91 1.03 1.69 1.69 0.79 0.79 16.9 16.9 44 24 39 39 18 18 391 391 62 56 56 23 3 17 17 8 8 160 160
20 GM Auto Mall C Auto Dealership' 641 53.00 ksf 1.61 0.60 1.12 1.68 1.51 1.46 18.75 18.75 85 32 59 89 80 n 994 994 34 26 85 32 34 64 60 57 825 825
1005 IKEA Hioh Tum-Over Restaurants 832 25.86 ksf 4.82 4.45 6.52 4.34 12.60 7.40 65.17 65.17 125 115 169 112 326 191 1685 1685 43 43 125 115 109 52 215 80 1685 1685
1005 Shooolno Center 820 109.36 ksf 0.94 0.60 2.92 3.17 4.40 4.06. 33.01 33.01 103 66 320 346 481 444 3610 3610 34 26 103 66 207 233 361 324 3610 3610
128 Casamlra Valley (Moller Poperty REMOVEDl Single Family Residential' 210 269 d.u. 0.18 0.55 0.62 0.35 0.50 0.43 4.79 4.79 49 148 168 94 135 115 1288 1288
128 Mission Peak Single Family Residential' 210 103 d.u. 0.20 0.60 0.69 0.39 0.54 0.46 5.20 5.20 21 62 71 40 56 47 536 536 21 62 71 40 56 47 536 536
113 Schaefer Ranch Retail 3.11 814 26.00 !<sf 1.75 1.62 1.11 1.48 2.17 2.01 20.34 20.34 46 42 29 36 56 52 529 529 34 26 45 42 18 27 42 36 439 439
121 See's Vacant Lot Retail 3,11 814 7.905 !<sf 1.75 1.62 1.11 1.48 2.17 2.01 20.34 20.34 14 13 9 12 17 16 161 161 34 26 14 13 5 8 13 12 134 134
109 Shamrock Ford Site/Circuit Citv Retan" 863 30.00 !<sf 1.83 1.63 2.21 2.30 4.49 3.98 22.52 22.52 55 49 66 69 135 119 676 676 34 26 55 49 44 46 100 88 561 561
5 west Dublin BART S.P.: OrlxJLegacy Multi-Family Residential" 220 210 d.u. Rates not . Net new trins obtained from specffic plan S1udies. 30 155 151 74 127 62 1202 1202
5 West Dublin BART S.P. Business Hotel' 312 150 rooms Rates not .nnRcable. Net new trino obtained from soecIfic oian studies. 46 32 50 33 61 40 491 491
5 West Dublin BART S.P. QuaRty Restaurant" 831 7.50 !<sf Rates not aoo&cable. Net new trios obtained from soecIfic plan S1udles. 5 1 37 19 48 33 337 337
5 West Dublin BART S.P. 0fIIce " 710 360.70 !<sf Rates not aopicable. Net new trips obtained from soeclfic oian studies. 590 80 110 531 97 80 2365 2365
5 West Dublin BART S.P. BART" NA 713.00 spaces Rates not annficable. Net new triDS obtained from soecIfic oian studies. 354 92 85 296 35 81 1107 110
Grand Total Total 1653 933 1150 1616 1425 1134 15817 15817
Land Use Database_Update_060506.xls
Source: TKJM Transportation Consultants, 'A Traffic Study for the Proposed Fallon Crossings Development," September 28,2005, and Updates by City Staff.
Table C2. Pending
TABLE C3: BUILDOUT PROJECTS IN DUBLIN (As of December 2005)
Traffix ITE Rates Total Trips -I. Pass-By Net New Trips
Zone Development Name Land Use Code Size 1 Units AM PM Saturday Dally AM PM Saturday Dally Traffic' AM PM Saturday Dally
In Out In Out In Out In Out In Out In Out In Out In Out AM PM Sat In Out In Out In Out In Out
14 15A Corporate Headquarters Building" 714 433.50 ksf 1.15 0.09 0.12 1.06 0.22 0.19 3.28 3.28 424 33 44 391 81 70 1209 1209 424 33 44 391 81 70 1209 1209
12 16A Corporate Headquarters Building " 714 428.50 ksf 1.15 0.09 0.12 1.06 0.22 0.19 3.28 3.28 419 33 44 386 80 69 1195 1195 419 33 44 386 80 69 1195 1195
114 Anderson: EDPO Single Family Residential' 210 71 d.u. 0.19 0.55 0.65 0.36 0.51 0.43 4.79 4.79 13 39 46 26 38 31 340 340 13 39 46 26 38 31 340 340
114 Anderson: EDPO Ught Industrial' 110 317.11 ksf 0.81 0.11 0.12 0.86 0.Q7 0.Q7 3.49 3.49 257 35 38 273 22 22 1107 1107 257 35 38 273 22 22 1107 1107
114 Branaugh: EDPO Light Industrial' 110 120.35 ksf 0.81 0.11 0.12 0.86 0.07 0.07 3.49 3.49 97 13 14 104 8 8 420 420 97 13 14 104 8 8 420 420
114 BranauQh: EDPO Single Family Residential' 210 98 d.u. 0.19 0.55 0.65 0.36 0.51 0.43 4.79 4.79 19 54 64 35 50 42 469 469 19 54 64 35 50 42 469 469
1t6 EDPO SE and S.Central Light Industrial' 110 564.22 ksf 0.81 0.11 0.12 0.86 0.07 0.Q7 3.49 3.49 457 62 68 485 39 39 1969 1969 457 62 68 465 39 39 1969 1969
5 Corrie Site Auto Dealership 841 33.90 ksf 1.61 0.60 1.12 1.68 1.51 1.46 18.75 18.75 55 20 38 57 51 49 636 636 34 26 55 20 22 41 38 38 528 528
117 Croak: EDPO Single Family Residential" 210 426 d.u. 0.18 0.54 0.60 0.33 0.49 0.42 4.62 4.62 77 231 254 143 210 179 1966 1966 77 231 254 143 210 179 1966 1966
118 DiManto Multi-Family Residential' 220 540 d.u. 0.08 0.42 0.39 0.19 0.40 0.40 3.12 3.12 43 228 208 103 218 218 1685 1685 43 228 208 103 218 218 1685 1685
120 DiManto Commercial/ Retail Commercials 820 846.46 ksf 0.41 0.26 1.46 1.58 2.15 1.99 15.90 15.90 348 223 1234 1337 1822 1682 13458 13458 34 26 348 223 797 900 1386 1226 11170 11170
121 Downtown Core S.P. Commercial' 820 237.85 ksf Rates not applicable. Net new trips obtained from soecific oIan studies. 49 67 242 221 320 296 2747 2747
121 Downtown Core S.P. Office 1 710 54.72 ksf Rates not applicable. Net new trips obtained from soecific plan studies. 418 57 77 376 67 57 1675 1675
121 Downtown Core S.P. Multi-Family Residential" 220 100 d.u. Rates not acollcable. Net new trips obtained from soecific plan studies. 6 30 29 14 16 20 232 232
50 Dublin Ranch B Commertial' 820 163.35 ksf 0.80 0.51 2.55 2.76 3.82 3.53 28.61 28.61 118 75 375 406 562 519 4206 4206 34 26 118 75 242 273 421 378 3491 3491
35 Dublin Ranch C Commercials 820 375.05 ksf 0.57 0.37 1.92 2.08 2.86 2.64 21.28 21.26 193 123 649 703 965 891 7177 7177 34 26 193 123 419 473 724 650 5957 5957
35 Dublin Ranch C Office 6 710 1301.31 ksf 0.97 0.13 0.20 0.98 0.13 0.11 3.68 3.66 1142 156 235 1149 152 129 4285 4285 1142 156 235 1149 152 129 4285 4285
122 Dublin Ranch D Single Family Residential' 210 1 d.u. 0.19 0.55 0.65 0.36 0.51 0.43 4.79 4.79 0 1 1 0 1 0 5 5 0 1 1 0 1 0 5 5
34 Dublin Ranch E Elementary School; 520 295 pupils 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
38/37 Dublin Ranch F Neighborhood Park NA 6.7.0 acres 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
38 Dublin Ranch G PubliclSemi-Public ;.10 580 20.26 ksf 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
107 Dublin Ranch (Town Center VC) G Commercial 3.11 814 230.00 ksf 1.75 1.62 1.11 1.48 2.17 2.01 20.34 20.34 403 373 255 340 499 462 4678 4678 34 26 403 373 154 239 374 337 3883 3883
40/41 Dublin Ranch H CommercialS 820 384.44 ksf 0.57 0.38 1.91 2.07 2.83 2.62 21.07 21.07 196 125 660 715 981 905 7292 7292 34 26 196 125 426 481 736 660 6052 6052
40/41 Dublin Ranch H Research and Development Center' 760 860.53 ksf 0.86 0.18 0.14 0.79 0.09 0.07 3.50 3.50 668 137 108 611 70 54 2710 2710 668 137 108 611 70 54 2710 2710
4 Dublin Transit Center Apartments '" 220 823 d.u. 0.08 0.43 0.42 0.20 0.26 0.26 3.32 3.32 49 265 259 123 160 160 2049 2049 49 265 259 123 160 160 2049 2049
4 Dublin Transit Center Corporate Office 31 714 2000 ksf 1.37 0.10 0.15 1.24 0.22 0.22 3.86 3.86 2329 170 255 2108 374 374 6582 6562 2329 170 255 2108 374 374 6562 6562
4 Dublin Transil Center Speciality Retail " 814 70 ksf No additional trips. Retail is considered 'ancillarV' to the proposed T.C. office space and would not generate extemallrips. 34 26 0 0 0 0 0 0 0 0
125 Government Center Office '.'u 714 669.77 ksf 1.24 0.09 0.13 1.07 0.21 0.18 3.74 3.74 833 63 88 713 138 118 2505 2505 833 63 88 713 138 118 2505 2505
18 Greenbriar Phase 4 Single Family Residential' 210 164 d.u. 0.19 0.57 0.65 0.37 0.51 0.44 4.98 4.98 31 93 107 60 84 72 817 817 31 93 107 60 84 72 817 817
18 GYlli Single Family Residential' 210 10 d.u. 0.19 0.56 0.65 0.36 0.51 0.43 4.79 4.79 2 6 7 4 5 4 48 48 2 6 7 4 5 4 48 48
132 Herrera 'Frederich' Multi-Family Residential' 220 68 d.u. 0.09 0.46 0.55 0.27 0.35 0.35 3.98 3.98 6 31 37 18 24 24 271 271 6 31 37 18 24 24 271 271
132 Herrera "Frederich" Commercial 3.11 814 58.81 ksf 1.75 1.62 1.11 1.48 2.17 2.01 20.34 20.34 103 95 65 87 128 118 1196 1196 34 26 103 95 39 61 96 86 993 993
124 Jordan:EDPO Single Family Residential' 210 788 d.u. 0.18 0.53 0.58 0.32 0.49 0.41 4.39 4.39 140 421 441 248 383 326 3483 3463 140 421 441 248 383 326 3463 3463
127 Jordan:EDPO Multi-Family Residential' 220 436 d.u. 0.08 0.42 0.39 0.19 0.23 0.23 3.15 3.15 35 185 171 84 99 99 1374 1374 35 185 171 84 99 99 1374 1374
127 EDPO SE and S.Central Commercial 6 820 376.14 ksf 0.57 0.36 1.92 2.08 2.86 2.64 21.24 21.24 215 137 723 783 1074 992 7989 7989 34 26 215 137 467 527 805 723 6631 6631
132 Moura "Tipper'" Multi-Family Residential' 220 82 d.u. 0.09 0.45 0.52 0.25 0.32 0.32 3.81 3.81 7 37 42 21 26 26 313 313 7 37 42 21 26 26 313 313
11 Neilsen Single Family Residential' 210 1 d.u. 0.19 0.58 0.65 0.36 0.51 0.43 4.79 4.79 0 1 1 0 1 0 5 5 0 1 1 0 1 0 5 5
102 Ralev 'Kobold' Multi-Family Residential' 220 20 d.u. 0.08 0.43 0.42 0.20 0.26 0.26 3.32 3.32 2 9 8 4 5 5 66 66 2 9 8 4 5 5 66 66
128 Redgewlck Single-Family Residential' 210 67 d.u. 0.19 0.56 0.65 0.36 0.51 0.43 4.79 4.79 13 38 44 24 34 29 321 321 13 38 44 24 34 29 321 321
114 RiQhetti:EOPO Single Family Residential (Low) , 210 95 d.u. 0.19 0.56 0.65 0.36 0.86 0.43 4.79 4.79 18 53 62 34 82 41 455 455 18 53 62 34 82 41 455 455
114 Righelti: EDPO Light Industrial J 110 255.32 ksf 0.81 0.11 0.12 086 0.07 0.07 3.49 3.49 207 28 31 220 18 18 891 891 207 28 31 220 18 18 891 891
114 TMI Chen: EDPO Multi-Family Residential' 220 332 d.u. 0.08 0.43 0.40 0.20 0.28 0.28 3.20 3.20 27 141 133 65 93 93 1062 1062 27 141 133 65 93 93 1062 1062
114 TMI Chen: ED PO Commercial 6 820 582.57 ksf 0.48 0.31 1.66 1.79 2.45 2.26 18.17 18.17 279 178 964 1045 1428 1318 10584 10584 34 26 279 178 622 703 1071 961 8785 8785
114 TMI Chen: EDPO Light Industrial J 110 287.09 ksf 0.81 0.11 0.12 0.86 0.07 0.07 3.49 3.49 233 32 34 247 20 20 1002 1002 233 32 34 247 20 20 1002 1002
132 Vargas Single Family Residential J 210 14 d.u. 0.19 0.56 0.65 0.36 0.51 0.43 4.79 4.79 3 8 9 5 7 6 67 67 3 8 9 5 7 6 67 67
132 Vargas Condominium 6 230 72 d.u. 0.09 0.46 0.44 0.21 0.47 0.40 3.42 3.42 7 33 31 15 34 29 246 246 7 33 31 15 34 29 246 246
5 West Dublin BART S.P. Commercial 1. 820 344.07 ksf Rates not applicable. Net new trips obtained from specific plan studies. 238 171 867 901 1243 1110 10418 10418
Grand Total Total 10179 4310 7287 12909 9831 8845 101439 101439
Land Use Database_Update_060506.xls
Source: TKJM Transportation Consultants, "A Traffic Study for the Proposed Fallon Crossings Development: September 28. 2005, and Updates by City Staff.
Table C3. Buildout
Table C4: Pleasanton and Douaherty Valley land Use Assumptions
Future Baseline Traffic Estimates
Trips
Land Use Size Units AM PM Dailv
In Out In Out Total
IIMedlcal GllnlC 72 ksf 140 35 74 200 2601
MF Units 21 d.u. 1 9 9 4 139
Office 207 ksf 284 39 52 256 2279
Retirement Home 65 d.u. 5 9 10 5 380
Light Industrial 679 ksf 495 109 129 496 4723
Retail 200 ksf 126 81 360 518 8596
SF Units 178 d.u. 34 100 116 63 1704
Warehouse 56 ksf 21 4 7 22 278
Pleasanton total" 1106 386 .757 1564 20700
Shape II Single Famill3 815 d.u. 20 60 68 39 1014
Shapell Multi-Famill3 335 d.u. 4 19 18 9 289
Windemere Single Famill3 2012 d.u. 49 147 169 95 2503
Windemere Condos33 322 d.u. 3 15 15 7 245
Windemere Apartments33 743 d.u. 8 41 40 20 640
Dougherty Valley total 4227 d.u. 50 173 311 170 4691
Grand Total 1156 559 1068 1734 25391
" Pleasanton Baseline Land Use was assumed to be 23 percent of Pleasanton Buildout
land Use Database_Update_060506.x1s
Source: TKJM Transportation Consultants. -A Traffic Study for lhe Proposed Fallon Crossings Development." September 28. 2005.
Table C4. Pleasanton.Dougherty
Footnotes for Tables C1, C2 and C3
1 All land use sizes are based on information provided by the City or extracted from previous project
reports as directed by the City.
2 Pass-by traffic percentages obtained from the Institute of Transportation Engineers (ITE) Trip
Generation Handbook, October 1998. Shaded values are assumed same as weekday PM peak.
3 Trip rates are average rates from the ITE Trip Generation, 6th Edition, according to the guiding
principles stated in the Trip Generation Handbook, October 1998.
4 AM, PM, and daily trip rates are based on Fina/ Report Transportation and Parking Impacts for the
Proposed Armstrong Garden Center, City of Dublin, June 21, 2002. Saturday trip rates are averages
rates from the ITE Trip Generation, 6th Edition, according to the guiding principles stated in the Trip
Generation Handbook, October 1998.
5 AM, PM, and daily trip rates are based on Final A Traffic Study for the Proposed Trumark Homes
Development in the City of Dublin, December 15, 1999. Saturday trip rates are average rates from the
ITE Trip Generation, 6th Edition, according to the guiding principles stated in the Trip Generation
Handbook, October 1998.
6 Trip rates for developments based on regression equation from the ITE Trip Generation, 6th Edition,
according to the guiding principles stated in the Trip Generation Handbook, October 1998. Fairway
Ranch staff report specified that density bonus increase was linked to Dublin Ranch Areas B-E total unit
counts remaining at 1,875. Since the 744 Apts. allowed under the PD were increased by 186 units as a
density bonus, 186 units of SFR have been removed from the 958 SFR allowed under the PD for a total
of 772 SFR (M) units. In addition, 90 units from Area B M1 have been removed because M1 has been
included in the Area F North GPA proposal for a total of 682 units.
7 Land uses that will not generate external trips. All trips will be internal to the development.
8 AM, PM, and daily trip rates are based on Consultant's Report on the Transportation Impacts for the
Proposed Dublin Volkswagen Auto Dealership, City of Dublin, December 1999. Saturday trip rates are
averages rates from the ITE Trip Generation, 6th Edition, according to the guiding principles stated in
the Trip Generation Handbook, October 1998.
9 AM and PM trip rates are averages rates from the ITE Trip Generation, 6th Edition, according to the
guiding principles stated in the Trip Generation Handbook, October 1998. Assumed PM rates are 10%
of daily rates and used ratio of weekday rate to Saturday rate and applied to PM rate to get Saturday
peak hour rate.
10 AM, PM, and daily trip rates are based on Final A Traffic Study for the Proposed Emerald Glen Village
Apartments Development in the City of Dublin, March 20, 2000. Saturday trip rates are averages rates
from the ITE Trip Generation, 6th Edition, according to the guiding principles stated in the Trip
Generation Handbook, October 1998.
11 For Specialty Retail (use 814), AM trip rates were based on the ratio of AM to PM peak hour of
generator, multiplied by the PM rate. Saturday peak rates for use 814 was based on the ratio of
Saturday peak hour of generator to Saturday for Shopping Center (use 820), multiplied by Saturday rate
for use 814.
Land Use Oatabase_Update_060506.x1s
Source: TKJM Transportation Consultants. -A Traffic Study for the Proposed Fallon Crossings Development.~ September 28, 2005.
Footnotes
Page 5
12 There is no trip Generation for Saturday from land use 845 thus, this is based on 846 which had similar
AM and PM peak hour trip generation rates.
13 AM, PM and daily trip rates were based on Draft Focused Traffic Ana/ysis for the Proposed Dublin
ViI/age Development, May 30,2003. Saturday trip rates for Townhouse (use 231) were based on the
ratio of Saturday peak to PM peak for use 230, multiplied by the PM peak rate for use 231. For
Apartment (use 220), average Saturday trip rates were used.
14
AM, PM and daily trip rates were based on Final Focused Traffic Analysis for the Proposed San Ramon
Village Plaza Deve/opment, June 10,2003. Saturday trip rates for Townhouse (use 231) were based
on the ratio of Saturday peak to PM peak for use 230, multiplied by the PM peak rate for use 231.
15 Trip generation based on Fina/ Report: IKEA Retai/ Center Transportation Study, Dublin, California,
August 2003.
16 AM, PM, and daily trip rates are based on Focused Traffic Circulation Analysis for the Proposed Cisco
Systems Projects, City of Dublin, May 21, 2001. Saturday trip rates are average rates for General
Office Building (use 710) from the ITE Trip Generation, 6th Edition, according to the guiding principles
stated in the Trip Generation Handbook, October 1998.
17
Net new trips for AM, PM, and daily based on Consultant's Report on the Transportation Impact for the
Proposed Village Parkway, Downtown Core, and West BART Station Specific Plans, City of Dublin.
Net new trips were adjusted proportionately in some cases to reflect current projections. Assumed 15%
reduction in office trips due to proximity to the West Dublin BART station. Also assumed 34% pass-by
trips for commercial during the PM peak. Used ratio of Saturday rates to PM rates from ITE Trip
Generation and applied to PM net new trips to determine Saturday net new trips. Residential trips
include a 30% reduction based on proximity to the BART Station as specified in the above report.
Business Hotel and Quality Restaurant trips are based on ITE trip rates for the Orix Development.
18 Public/semi public area is assumed to be a church based on information provided by the City. The
floor/area ratio assumed is 0.15 based on survey of a few churches in Fremont, CA.
19 Only 50% of high school trips will be external trips, the rest will be internal to the development.
20 ITE Trip Generation for Corporate Headquarters Building (714) was used for rates because
government office building (730) only has one observation and corporate headquarters building is a
single tenant office building similar to government office building. Saturday trip rates were based on the
ratio of PM average rate for corporate headquarters building to PM average rate for general office
building, multiplied by the Saturday peak rate for general office building.
21 PM trip rate is based on Consultant's Report on the Transportation and Parking Impacts for the
Proposed Shamrock Marketplace Shopping Center Expansion, September 8, 2000. AM, Saturday, and
daily trip rates based on ITE Trip Generation 6th ed.
Land Use Database_Updale_060506.xls
Source: TKJM Transportation Consultants. -A Traffic Study for the Proposed Fallon Crossings Development.- September 28, 2005.
Footnotes
Page 6
22 Trip rates based on proposed trip generation provided by T JKM, as part of Revised Draft Traffic Study
for the Proposed Silveria Ranch Development in the City of Dublin, August 29, 2003. Daily and
Saturday peak trip rates are average rates from the ITE Trip Generation, 6th Edition, according to the
guiding principles stated in the Trip Generation Handbook, October 1998.
23 BART traffic based on Table 4.5-5 Dublin Trip Generation - Proposed Project from Draft Supplemental
Environmental Impact Report for the West DublinlPleasanton BART Station and Transit Village Project,
November 2000. Saturday peak hour trips were determined from the ratio between daily weekday
BART trips and Saturday BART trips (42% obtained from BART system wide ridership data). Saturday
peak hour trips were calculated by using the same ratio as weekday PM peak hourlDaily trips (12.4%).
In and out trips were determined by using the same split as the weekday PM peak hour (30% in and
70% out).
24 Trip generation based on Supplemental Traffic Circulation Analysis for the Proposed Commerce One
Project, City of Dublin, December 22,2000. Saturday rate based on ITE trip generation for Corporate
Headquarter (714), Trips are not shown because IKEA project will replace this development.
25 Trip rates based on proposed trip generation provided by T JKM, as part of Fina/ Traffic Study for the
Proposed Fairway Ranch Development in the City of Dublin, April 15, 2003. Daily and Saturday peak
trip rates are average rates from the ITE Trip Generation, 6th Edition, according to the guiding
principles stated in the Trip Generation Handbook, October 1998.
26 Saturday and weekday trip generation rates based on High School land use (530).
27 Trip rates based on assumptions in Traffic Impact Study for Dublin Valley Christian Center Proposed
Expansion, May 2001.
28 Trip rates based on proposed trip generation provided by T JKM, as part of Draft Fina/ Traffic Study for
the Proposed Dublin Ranch West Development in the City of Dublin, August 26, 2003. Daily and
Saturday peak trip rates are average rates from the ITE Trip Generation, 6th Edition, according to the
guiding principles stated in the Trip Generation Handbook, October 1998.
29 25% reduction in trips due to proximity to the East Dublin BART Station, City of Dublin Consultant's
Report: Transportation Impacts For the Proposed Dublin Transit Center, April 27, 2001.
30 Based on City of Dublin Consultant's Report: Transportation Impacts For the Proposed Dublin Transit
Center, April 27, 2001, the proposed BART parking structure would not add any additional parking
spaces to the existing East Dublin BART station. Currently, there are 1,680 existing surface parking lot
spaces for the BART station. These surface spaces would be replaced by the proposed 1,680-space
BART parking structure. Therefore, the proposed BART parking structure would not result in additional
traffic volumes on the surrounding street network.
31 15% reduction in trips to account for residential/employment interaction and increased use of transit
due to proximity to the East Dublin BART Station, City of Dublin Consultant's Report: Transportation
Impacts For the Proposed Dublin Transit Center, April 27, 2001.
32 Specialty retail rates obtained from City of Dublin Consultant's Report: Transportation Impacts For the
Proposed Dublin Transit Center, April 27, 2001.
land Use Database_Update_060506.xls
Source: TKJM Transportation Consultants. -A Traffic Study for the Proposed Fallon Crossings Development: September 28. 2005.
Footnotes
Page 7
33 According to the Dougherty Valley General Plan, Specific Plan, and Related Technical Appendices,
June 1992, only 13 percent of the Dougherty Valley traffic will travel through Eastern Dublin area via
Tassajara Road and Dougherty Road, therefore only those trips are reflected in the trip generation
table. Trip rates are based on average rates from the ITE Trip Generation, 6th Edition.
34 Trip rates are based on ITE rates for Electronic Superstore (863). Saturday trip rates were derived by
applying the Saturday/PM peak ratio for Home Improvement Superstore (862) to the PM peak rate for
Electronic Superstore.
Land Use Database_Update_060506.x1s
Source: TKJM Transportation Consultants. -A Traffic Study for the Proposed Fallon Crossings Oevelopment.~ September 28, 2005.
Footnotes
Page 6
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ApPENDIX D - LEVEL OF SERVICE WORKSHEETS:
BASELINE CONDITIONS
INTERSECTION 3
JURISDICTION CIT~
COUNT DATE
3 of 14
n OF PHASES
2
H-S STREET:HACIENDR DR.
OF DUBLIN
vel' . I' I'
E-\1 STREET: 1-580 1m RAI1PS
METHOD :CCTA
PEAl{ HOUR :PM
TIME :BRSELINE
SPLIT ?
NS
o NO
4
0.0 2.0
A
1--
N
II-i-E
S
313 RIGHT
RIGHT fHRU LEFT
1247 862
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1.9 3.0
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r+
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0.0
~I
o
2.0
A
I
1418
.-
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NO
UOLUI1E=2
NE CUC:T
EB CUC:R
SB CUC:L
1m CUC:L
=0.3939
=0.0000
=0.0000
=0.1091
TOTAL UI'C
LOS
S I'IARRANT<U.R)
0.50
A
V.V
-----FILES-------
.A=~
B=
C=
D=
E=
1=:fITIl~
2- I
3 . I
4=1
5=-- ~- .
6=
7=
8=
9=
~
CAP=
PRN=PRN
ver 2.35 12/05/05
E-Il STREET: I -580 \lB :RAMPS
METHOD :CCTA
PEAH HOUR :AM
-----FILES-------
.. A=~
B=
c=
D=
E=
1=~--i1IIlIlIIIIIIII-1
2-
3 ,
4=~ III
5=---
6=
7=
8=
9=
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CAP=
PRN=PRN
CCTA INTERSECTION CAPACII~ ANALYSIS
INTERSECTION 6 N-S STREET:TASSAJARA :RD.
JURISDICTION CITY OF DUBLIN
COUNT DATE
6 of 14
ff OF PHASES
2
TINE :BASELINE
LEFT
THRU
RIGHT
1379
~-.J
1.9
NS SPLIT ?
o NO
L~ to
0.0 2.0 L- 591 RIGHI
H
ll-t-E
S
A
0---' 0.0
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1358
I
'f
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V -<l---, A, r+
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NO 0 1487 771
2.0 r- 662 LEFT
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RIGHT
UOLUME=1
HB CUC:T =0.4131
EB CUC:R =0.0000
SB CUC:L =0.0000
WB CUC:L =0.2023
TOTAL U/C
LOS
S UARRAHT(U.R)
0.62
B
Y.Y
HB CUC:T =0.4473
EB CUC:L =0.2253 TOTAL U/C 0.74
SB CUC:L =0.0194 LOS C
1m CUC:TR =0.0515 S IIARRANI<U.R) 'LY.
CCTA INTERSECTION CAPACITV ANAL~SIS
INTERSECTION 8 N-S STREET:TASSAJARA RD.
JURISDICTION CITV OF DUBLIN
COUNT DAlE
8 of 14
It OF PIJASES
3
uer 2.35 07/17/06
E-U SIlmEr :FALLON RD.
METHOD :CCIA
PEAl< HOUR :PM
TIME :BASELINE
LEFI
TI-IRtI
JUGHT
728
..j~
1.0
N
II-/-E
S
3 HI GfJ1'
30 THRU
IHRU LEFT
52
I
'f
1.0
HS SPLIT ?
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~. &
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iJ,
1107---1 2.0
52~' 1.1
(HO. OF LANES)
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v
1 LEFT
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V ~~ A .-...
EW SPLIT ? ! I I
NO 46 9 2
RIGHI
UOLUt1E=2
HB CUC:L
EB CUC:L
SB CUC:R
I,IB CUC:I
=0.0267
=0.3540
=0.0692
=0.0174
TOInL U/C
LOS
S I.IARRANHU.JD
0.47
A
V.V
-----FILES-------
.A=~
B=
C=
D=
E=
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5=
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PRH=PRH
JI""1- r-. Kimley-Hom
~_ ~ and Associa1es, Inc.
ApPENDIX E - LEVEL OF SERVICE WORKSHEETS:
BASELINE PLUS PROJECT CONDITIONS
HB CUC:~ =0.2190
EB CUC:! =0.2183 ~OIAL U/C 0.74
SB CUC:L =0.1707 LOS C
HB CUC:L =0_1273 S \.IARRANI<U 1D ... ...
vep 2.35 ~2/05/05
IHJ STREET: 1-'580 UB llAMPS
METHOD :CCTA
PEAl( HOUR :AM
CCTA INTERSECTION CAPACITY ANALYSIS
INTERSECTION 6 H-S STREET:~ASSAJAllA llD.
JURISDICTION CITV OF DUBLIN
COUNT DATE
6 of :14
tt OFPllflSES
2
lIME :BASE+PROJECT
H
tl-l-E
S
LEFI
1'IIRU
111 GIlT
HI SPLI T
NO
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:1406
A -4.-3
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HS SPLIT ?
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i~
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A
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o THRU
662 LEFT
2.0 .-
'V
0-, 0.0 0.0 2.0 :1.9
? 'V ~I t r
o ~500 '7?~
UOLUME=3
NB CUC:~ =0.416'7
EB CUC:R =0.0000
SB CUC:L =0.0000
UB CUC:L =0.2023
TOTAL U/C
LOS
S 1,IARRAHT<U 1l)
3.62
B
Y V
-----FILES-------
.A=~
B=
C=
D=
E=
:1=~
2~' I
3=':
4=L____-=_ _
5=
6=
'7=
8=
9=
~
CAP=
PRH=PRH
uer 2.35 12/05/05
E-I! STREET :DUBLI N lILUD.
METHOD :CCTA
PEAl( HOUR :AM
CCTA INTERSECTION CAPACIT~ ANALYSIS
INTERSECTION 9 H-S STREET:FALLON ~D.
JURISDICTION CITY OF DUBLIN
COUNT DATE
9 of i4
fi OF PHASES
3
TIME :lIA8E+PROJECT
LEFT
~HRU
R I GIlT
5i
&. "'1~
33-1 1.0 1.0
THRU LEFT
630
~'-+
i.0 0.0
N
U-f-E
S
o RIGHT
o THRU
o LEFT
NS SPLIT ?
o NO
Ii.
0.0 1-
0~ 0.0 (NO. OF LANES) 0.0~--
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? 'f .olI~ AI' r+
Ell SPLIT I I
NO 59 298 0
0.0 ~
"I'
UOLUME=3
NB CUC:L =0.0189
ED CUC:R =0.0560
811 CUC:T =0.3663
WB CUC:L =0.0000
TOTAL U/C
LOS
S tJRRRANT<U.~)
0.44
A
N.V
-----FILES-------
.A=~
11=
c=
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1=_
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9=
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~_~ Kimley-Hom
~_U and Associa1es, Inc.
ApPENDIX F - LEVEL OF SERVICE WORKSHEETS:
BASELINE PLUS PROJECT ALTERNATIVE CONDITIONS
CCTA INTERSECTION CAPACITY ANALYSIS
INTERSECTION 1 N-S STREET:DOUGHERTY RD.
JURISDICTION CITY OF DUBLIN
COUNT DATE
1 of 14
tl OF PHASES
8
TIME :BASE+PROJ ALT
LEFT
vcr 2.35 06/02/06
E-II STREET :DUIlLIN BLUD.
HEnlOD : CCTA
PEAl{ HOUR :AM
-----FILES-------
.A=~
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2=~
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tl
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V
RIGHT I!Hm LEFT "IS SPLIT -t
177 1291 550 NO
A ~.-J ~ 4 A
116--1 2.0 1.1 4.1 2.0 1.0 L- 411 RIGHT
644~ 3.0 (NO. OF LANES)
RICIn 382--, 2.5 3.0 3.0 2.5
V -"4-m AI ~
Ell SPLIT ? I I
NO 741 652 491
nnm
UOLUME=1
NIl CUC L =0.1722
EB CUC T =0.1301 TOTAL U/C 0.64
SB CUC TR =0.2224 LOS B
UB CUC L =0.1134 S IJARRANT<U R) Y Y
CCTA INTERSECTION CAPACITY ANALYSIS
INTERSECTION 1 N-S STREET:DOUGHERTYRD.
JURISDICTION CITY OF DUBLIN
COUNT DATE
1 of 14
tt OF PHASES
8
TIME :BASE+PROJ ALT
tOCl' 2.35 06/02/06
B-II STREET :DUBLIN BLUD.
METHOD :CCTA
PEAl{ HOUR :PM
-----FILES-------
.fl=~
Il=
c=
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B=
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2=~
3=
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7=
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HIGHT THRU LEFT W, SPLIT ?
137 691 512 NO
4.-J ~ 4 A
1.1 4.1 2.0 1.0 L- 452 RIGHT
N
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S
LEFT
THIlU
RIGHT
&
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(NO. OF LANES) 3.0 -<1--
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I
768 1084 623
Ell SPLIT ?
NO
886 TlUUl
548 LEFT
UOLUME=2
HE CUG:T =0.2190
En CUC:I =0.2188 TOTAL U/C 0.74
SB CUC:L =0.1707 LOS C
lIB CUC:L =0.1273 S UflRRflNT<U JI) Y Y
vep 2.35 06/05/06
E-l! STREET: 1-580 \olB 'RAMPS
METHOD : CCTA
PEAK HOUR :P/1
CCTA INTERSECTION CAPACITY ANALYSIS
INTERSECTION 3 H-S Sl'REET:HACIENDA DR.
JURISDICTION CITY OF DUBLIN
COUNT DATE
3 of 1.4.
tt OF P!HISES
2
TIME :BASE+PROJ ALl
LEFT
lllRU
RIGHT
RIGHT
1247
~~
1..9
num LEFT
863
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3.0
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N
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NS
o NO
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HB CUC:I
ED CUC:R
SB CUC:L
IlB CUC:L
=0.3944
::0.0000
=0.0000
=0.1091
TOTAL U/C
LOS
S UARRANI<U R)
0.50
A
'l y
-----FILES-------
.I'l=~
11=
C=
D=
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PRN=PRN
NB CUC:L =0.0000
EB CUC:L =0.0000 TOTAL U/C 0.37
SB CUC:! =0.2631 LOS ~
VB CUC:R =0.1057 S WARRANI(U R) Y Y
~=~
Kimley-Hom
and Associates, Inc.
ApPENDIX G - LEVEL OF SERVICE WORKSHEETS:
BUILDOUT CONDITIONS
SOURCE: TJKM TRANSPORTATION CONSULTANTS. "A TRAFFIC STUDY FOR THE
Proposed Fallon Crossings Development." September 28.2005.
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Appendix F:
Excerpt from the Dublin Ranch West Supplemental Environmental.lmpact Report
(pages 103-107)
Initial StudylMitigated Negative Declaration for the Vargas Project
City of Dublin
March 2007
6 Hacienda Drive/ Gleason Drive 0.12 A 0.10 A
7 Santa Rita/I-580 Eastbound 0.60 A 0.68 B
Ramps/Pimlico Drive
8 Tassajara Road/I-580 Westbound Ramps 0.44 A 0.59 A
9 Tassajara Road/Dublin Boulevard 0.43 A 0.54 A
10 Tassajara Road / Central Parkway 0.47 A 0.45 A
11 Tassajara Road/Gleason Drive 0.47 A 0.52 A
12 Tassajara Road/South Dublin Ranch 0.42 A 0.48 A
Drive
13 Tassajara Road/North Dublin Ranch 0.44 A 0.36 A
Drive
14 Tassajara Road/ Quarry Lane School 0.43 A 0.38 A
Driveway
15 Tassajara Road/Northern Project Access 0.67 B 0.64 A
16 Tassajara Road/Fallon Road (Future Intersection)
19 Fallon Road/Dublin Boulevard (Future Intersection)
20 Fallon Road/ Gleason Drive (Future Intersection)
21 Fallon Road/ Antone Way 0.12 A 0.13 A
22 Hacienda Drive/Martinelli 0.30 A 0.34 A
Way /Hacienda Crossings
A.M Peak Hour P.M Peak Hour
ID Unsignalized Intersections* Delay Delay
sec/veh LOS sec/veh LOS
EI Charro Road/I-580 Eastbound Ramps - - - -
17 - Eastbound 1-580 EB Off-ramp (18.9) (C) (20.8) (C)
Approach
Fallon Road/I-580 Westbound Ramps - - - -
18 - Westbound 1-580 WE Off-ramp (12.3) (B) (11.9) (B)
Approach
Note: vie = volume to capacity ratio; LOS = level of Service;
X.X (X.X) = Overall Intersection Delay or lOS (Minor Movements Delay or lOS).
*HCM 2000 methodology does not report the overall intersection delay for one-way STOP
intersections.
Source: T JKM Transportation Consultants. 2004
Supplemental Traffic Impact TRA-2. Impacts to study intersections under
Buildout conditions.
The Buildout scenario includes the Baseline plus Project scenario added to full
buildout of all approved developments and all land uses included in the adopted
General Plans for Dublin, Pleasanton and the Dougherty Valley.
It is estimated that the Buildout projects in Dublin, Pleasanton and Dougherty
Valley, combined, would generate a total of approximately 376,437 additional
Dublin Ranch West Draft Supplemental EIR Page 103
City of Dublin November 2004
daily trips, with 27,641 trips occurring during the a.m. peak hour, and 36,985 trips
occurring during the p.m. peak hour. These trips include the vehicle trips that are
expected to be generated by the approved but not constructed IKEA project that
is to be located at the southwest comer of Dublin Boulevard and Hacienda Drive.
Trip distribution assumptions for the Buildout projects were developed based on
information from other previous traffic studies, knowledge of the area, an origin
and destination survey conducted in Apri12003, and consultation with Gty staff.
Traffic generated by the developments in Dublin, Pleasanton and Dougherty
Valley was assigned to the roadway system using the software TRAFFIX. The
assigned traffic was added to the Baseline plus Project turning movement
volumes to obtain Buildout traffic forecasts. Traffic assignments used the closest
proximity interchanges to access 1-580 while traffic was also distributed more
evenly among the interchanges in a manner consistent with the effects of ramp
metering on traffic patterns in the study area.
The Buildout TRAFFIX model used in this study represents the conditions of
approved, pending and buildout projects (including IKEA) in Dublin, as well as
approved and buildout projects within the Gty of Pleasanton, and Dougherty
Valley in Contra Costa County. This TRAFFIX model was developed jointly by
Fehr & Peers and TJKM Transportation Consultants to distribute and assign
traffic to the study intersections and analyze projects in Dublin. The model was
developed in order to better understand traffic on a local level, such as at key
intersections and local streets, which a regional model, such as the 2025 Tri-
Valley Model, does not fully consider. While the 1RAFFIX model uses a local
focus approach to forecast traffic within the Gty of Dublin, the model also takes
into account regional traffic patterns by considering potential traffic diversions
from 1-580 to adjacent surface streets within the 1-580 corridor. The output from
the 1RAFFIX model is shared with other consultants to maintain consistency in
the Gty of Dublin. The final traffic forecasts in this study were also compared to
Pleasanton's forecasts at affected interchanges for consistency between models.
Buildout roadway improvements
Additional roadway improvements beyond those discussed previously in this
report are planned within the Eastern Dublin area and are assumed in the
Buildout conditions analysis. They include:
Dublin Boule:vard/Tassajara Road Capacity Improvements: Addition of two
westbound left-turn lanes, one through lane and one right-turn lane; one
northbound left-turn lane and two through lanes; one eastbound left-turn
lane and one through lane; and one southbound left-turn lane. Some of these
improvements have been constructed, but not necessarily opened to traffic
(Eastern Dublin TIF improvement).
Scarlett Drive Extension: Extension of Scarlett Drive from Dublin Boulevard
north to Dougherty Road and associated intersection improvements at
Dublin Boulevard / Scarlett Drive and Dougherty Road/ Scarlett Drive, as
identified in the Transit Center EIR (Eastern Dublin TIF improvement). With the
Dublin Ranch West Draft Supplemental EtR
City of Dublin
Page 104
November 2004
Scarlett Drive extension, it was assumed that 75 percent of the volumes hr
the southbound left turn from Dougherty Road onto Dublin Boulevard and
the westbound right turn from Dublin Boulevard onto Dougherty Road were
assumed to shift to the Scarlett Drive extension.
Dublin Boulevard/Hacienda Drive Capacity Improvements: Addition of one
westbound right-turn lane and conversion of a northboundright-tum lane to
a third through lane (Eastern Dublin TIF improvement).
Hacienda Drive Widening: Widening of southbound Hacienda Drive from one
to two through lanes from Gleason Drive to Central Parkway (Eastern Dublin
TIF improvement).
Central Parkway Widening: Widening of Central Parkway from two to four
through lanes between Arnold Road and Tassajara Road (Eastern Dublin TIF
improvement).
Hacienda Drive/I-SSO Westbound Off-ramp Capacity Improvements: Widening of
the northbound Hacienda overpass to four lanes to accommodate an
exclusive lane leading to the 1-580 westbound loop on-ramp, and addition of
one shared right/left-turn lane on the off-ramp approach (Eastern Dublin TIF
improvement). These improvements are also identified in the Transit Center
and East Dublin Properties EIRs.
Hacienda Drive/I-SSO Eastbound off-ramp capacity improvement: Addition of one
shared right/left-turn lane on the off-ramp approach (Eastern Dublin TIF
improvement). lbis improvement is also identified in the East Dublin
Properties (EDPO) EIR.
Dublin Boulevard/Dougherty Road Capacity Improvement: Addition of related
ultimate improvements such as the widening of the 1-580 westbound
diagonal on-ramp at Dougherty Road to two single-occupancy-vehicle lanes,
as identified on pages 159 and 167 of the Transit Center Draft EIR and page
3.6-17 of the East Dublin Properties Draft Supplemental EIR. These
improvements are expected to occur with the development of the Transit
Center project (Eastern Dublin TIF Improvement).
Fallon Road Extension: Extension of Fallon Road north to Tassajara Road to
include four lanes of traffic (Eastern Dublin TIF Improvement).
Under this scenario, Dublin Boulevard (six lanes), Central Parkway (jour lanes) and
Gleason Drive (jour lanes) are assumed to be extended to Fallon Road.
Table 16 summarizes the results of the LOS analysis. The detailed LOS
calculations are contained in Appendix F of the Traffic Study.
Dublin Ranch West Draft Supplemental EIR
City of Dublin
Page 105
November 2004
Table 16. Intersection Level of Service under Buildout Conditions
A.M. Peak Hour P.M. Peak. Hour
ID Signalized Intersections
v/e LOS v/c LOS
1 Dougherty Road/Dublin Boulevard 0.76 C 0.92 E
2 Hacienda Drive/I-580 Eastbound 0.73 C 0.70 B
Ramps
3 Hacienda Drive/I-580 Westbound 0.82 D 0.50 A
Ramps
4 Hacienda Drive/Dublin Boulevard 0.67 B 0.98 E
5 Hacienda Drive/ Central Parkway 0.57 A 0.58 A
6 Hacienda Drive/ Gleason Drive 0.32 A 0.51 A
7 Santa Rita/I-580 Eastbound 0.89 D 0.89 D
Ramps/Pimlico Drive
8 Tassajara Road/I-580 Westbound 0.78 C 0.83 D
Ramps
9 Tassajara Road/Dublin Boulevard 0.65 B 0.82 D
10 Tassajara Road/Central Parkway 0.67 B 0.65 B
11 Tassajara Road/Gleason Drive 0.67 B 0.73 C
12 Tassajara Road/South Dublin Ranch 0.70 B 0.64 B
Drive
13 Tassajara Road/North Dublin Ranch 0.66 B 0.52 A
Drive .
14 Tassajara Road/Quarry Lane School 0.64 B 0.50 A
Driveway
15 Tassajara Road/Northern Project 0.64 B 0.62 B
Access
16 Tassajara Road/Fallon Road 0.27 A 0.47 A
17 E1 Charro Road/I-580 Eastbound 0.50 A 0.74 C
Ramps
18 Fallon Road/I-5S0 Westbound Ramps 0.51 A 0.73 C
19 Fallon Road/Dublin Boulevard 0.64 B 0.86 D
20 Fallon Road/ Gleason Drive 0.30 A 0.43 A
.
21 Fallon Road/ Antone Way . 0.24 A 0.28 A
22 Hacienda Drive/Martinelli 0.54 A 0.89 D
Way/Hacienda Crossings
Source: T JKM Transportation Consultants. 2004
Note: vIe = volume to capacity ratio; LOS = Level of Service;
X.X (X.X) = Overall Intersection Delay or LOS (Minor Movements
Dublin Ranch West Draft Supplemental EIR
City of Dublin
Page 106
November 2004
As shown in Table 16, twenty of the 22 study intersections are expected to
operate acceptably during the Alv1 and PM peak hours under Buildout. The
remaining two intersections of Dublin Boulevard/Dougherty Road and Dublin
Boulevard/Hacienda Drive are expected to operate below LOS D during the p.m.
peak hour despite the planned roadway improvements.
Dublin Boulevard/Dougherl:.}f Road. The Eastern Dublin EIR identified significant
impacts to this intersection based on potential LOS F operations. (Impact 3.3/F.)
Mitigation measure 3.3/6.0 called for future construction of additional lanes to
maintain LOS D operations, with fair share funding contributions from new
development in Eastern Dublin. The Gty has adopted an Eastern Dublin Traffic
Impact Fee in compliance with this mitigation. The Project is subject to this fee,
and other adopted traffic impact fees. As shown in Table 16, above, however, the
intersection is projected to operate at LOS E with planned intersection
improvements. 'This reduction in intersection operations from the Eastern Dublin
EIR would be a significant supplemental impact.
As mitigation, the Project traffic analysis recommends installation of a fourth
exclusive through lane on eastbound Dublin Boulevard. However, this
improvement is not feasible given the physical constraints at this intersection.
Thus, intersection operations would be a supplemental significant unavoidable
impact.
Dublin Boulevard/Hacienda Drive. The Eastern Dublin EIR identified significant
cumulative impacts to this intersection based on potential LOS F operations,
noting that no further widening of the intersection would be feasible. (Impact
3.3/M.) Mitigation measure 3.3/13.0 called for the Gty to participate in regional
transportation studies and funding programs. The Gty has so participated, and
the Project will be subject to adopted regional traffic fees.
As shown in Table 16 above, the intersection is projected to operate at LOS E
with planned intersection improvements; this is an improved operation
compared to the LOS identified in the Eastern Dublin EIR. As mitigation, the
Project traffic analysis recommends installation of a fourth exclusive through
lane on eastbound Dublin Boulevard. Consistent with the Eastern Dublin EIR,
and as noted above, this improvement is not feasible given the physical
constraints at this intersection. With the slightly improved operation at this
intersection, there are no significant impacts beyond those identified in the
Eastern Dublin EIR, and thus no supplemental impacts would occur.
Supplemental Impact TRA-3. Cumulative increase of Project related traffic on
adjacent freeways.
Development in Eastern Dublin was identified as a significant unavoidable
cumulative impact in the Eastern Dublin EIR (reference impact ThA 3.3/B, 1-580
freeway, 1-680 Freeway-Hacienda).
The cumulative daily traffic volumes projected in the Eastern Dublin EIR
(reference Table 3.3-9) on the 1-580, 1-680 freeways are close to the year 2003
Dublin Ranch West Draft Supplemental EIR
City of Dublin
Page 1 07
November 2004