HomeMy WebLinkAboutItem 4.04 I580TassajSolicitBidCI'TY CLERK FILE 600-35
AG E N DA STATE M E NT
CZTY COUNCTL MEETTNG DATE: November 6~ 2001
SUBJECT:
Authorization to Solicit Bids - Contract No. 01-12, ~
Interstate 580/Tassajara Road Interchange Improvement Project
Report Prepared by: Lee $. Thompson, Public Works Director
ATTACHMENTS:
Plans and Specifications will be available at the City Council
meeting
RECOMMENDATION: Authorize Staff to advertise for bids.
FINANCIAL STATEMENT:
The following are the budget and estimated cost for this project:
Design/Constr. Mgmt./Misc:
Right-of-Way:
Improvements:
Budget Estimated Cost
$ 2,997,116 $ 2,997,116
$ 548,961 $ 548,961
$10,795,568 $ 9,460,000
TOTAL: $14,341,645 $13,006,077
Staff has received the monies advanced by the Alameda County Surplus
Property Authority, Jennifer Lin, Mission Peak Homes, and Greenbriar
Land Co. to construct the project. Also, the supplementary Federal/State
funds programmed for the project have been approved by the State and the
project is fully funded. The advanced funds are being credited against the
required Eastern Dublin Traffic Impact Fees for the various developments.
DESCRIPTION: Staff has completed the plans, specifications and estimates required by
Caltrans to carry on the construction of the 1-580/Tassajara Road Interchange project. The proposed
capital project would increase the capacity of the interchange to accommodate future traffic demand,
including traffic generated by several approved developments north of the projedt site, and to
accommodate existing development south of the interchange.
This project is one of the traffic mitigations identified in the approval of the Eastern Dublin Specific Plan
and has been incorporated into the Eastern Dublin Traffic Impact Fee program.
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The proposed improvements to the interchange would include the following:
· Demolishing the existing two-lane northbound Tassajara Road overcrossing.
· Constru.cting a new three-lane northbound Tassajara Road overcrossing.
· Constructing an auxiliary lane along eastbound 1-580 from the northbound to eastbound Santa Rita
Road on-ramp to the E1 Charro Road off-ramp.
· Widening the westbound 1-580 off-ramp from a one-lane exit to a two-lane exit and providing a
400-meter (1,312-foot) auxiliary lane in advance of the exit.
· Widening the eastbound off-ramp to provide a second left-turn lane at the ramp terminus at the
intersection of Santa Rita Road and Pimlico Drive.
· Lengthening the left-mm lane on southbound Tassajara Road approaching the Pimlico Drive
intersection.
· Narrowing the existing median along westbound Pimlico Drive to provide a four-lane approach at the
Santa Rim intersection.
· Reconstructing the westbound 1-580 loop on-ramp.
· Widening the diagonal westbound 1-580 on-ramp to two lanes.
The existing traffic signals at the ramp intersections would be modified to accommodate the proposed
lane arrangements. Ramp metering, ramp entrance lighting, and intersection lighting would also be
modified as appropriate for the proposed improvements.
Caltrans is finalizing its review of the plans, and it is anticipated that the City will have the encroachment
permit needed to build the project by late November. The City had already received permission from
Pleasanton to perform work within Pleasanton's right-of-way. The construction period is estimated at
approXimately 18 months.
Staff recommends that the City Council authorize solicitation of bids for Contract No. 01-12, Interstate
580/Tassajara Road Interchange Improvement Project°
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