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Home My WebLink About4.05 Change Order No. 5 San Ramon Rd Phase IV , w CITY OF DUBLIN AGENDA STATEMENT City Council Meeting Date: August 12, 1991 SUBJECT: Contract Change Order No. 5 San Ramon Road Phase IV Project Report by Public Works Director Lee Thompson EXHIBITS ATTACHED: 1) Proposed Contract Change Order Exhibits A and B 2) Sketch showing addition of blocks to top of sound barrier RECOMMENDATION• pprove contract change order and authorize Mayor to 1_ x.W to. FINANCIAL STATEMENT: The cost of the contract change order is estimated to be $33,100. DESCRIPTION: The City Council is requested to approve this change order because the total cost exceeds $25,000, which is the City Manager's limit of approval. The purpose of this contract change order (CCO) is to authorize Redgwick Construction to install two courses of masonry block on top of the low soundwall along the easterly side of San Ramon Road between Vomac Road and Silvergate Drive. The unit price for the work is $16.55 per lineal foot. There is approximately 2,000 lineal feet of soundwall/curb and gutter; therefore, the total estimated cost of the work is $33,100. The contractor will be paid at $16.55 per foot for the exact length of the work. The purpose of this low soundwall rias, to reduce the noise and visual impacts of the San Ramon Road project upori'_the-:east-side residents directly adjacent to the project between Vomac Road and Silvergate Drive. Originally, the soundwall was to be separate from the curb and gutter. The conceptual design had the soundwall along the outside of the shoulder at the top of bank. It was determined that there was a potential safety hazard if the wall were installed in that location because of cars becoming airborne after mounting the six-inch curb; so the final design (reviewed and approved by F .- . Caltrans) moved the soundwall to the curbline and it was cast monolithically with the curb and gutter. Unfortunately, although the height of the soundwall did not change, the angles that it provides coverage for were lessened. Therefore, part of the noise and visual impact which was intended to be mitigated remains. The shape and design of the soundwall did not permit raising the height by adding additional concrete during construction, as it is a standard machine-extruded wall. Staff has proposed a means of raising the height in an aesthetically pleasing manner that will also be functional. The color of the concrete soundwall is the same as the masonry block soundwall installed in a previous project and the block wall being built along the access road entrance for this project. The two rows of masonry block proposed to be added to the top of the concrete soundwall will match the lower pattern of the block soundwalls (one row split face and one row vertical scored blocks) . The blocks will be attached by dowels to the concrete. This will provide a structural connection and also facilitate replacing any blocks that may be damaged in the future. Staff recommends that the City Council approve Contract Change Order No. 5 and authorize the Mayor t6 execute it. ---- ------ --------------------------------------------------------------- ITEM-NO. COPIES TO: Redgwick Construction Ray Miller, Caltrans EXHIBIT "A" 'CHANGE ORDER FORM DATE: July 26 1991 PROJECT NAME: SAN RAMON ROAD IMPROVEMENTS PHASE IV PROJECT CIP #: 9659 PROJECT FINANCE CONTROL ENGINEERING CONTRACT #: .90-01 PERCENT=COMPLETED: 70 COUNCIL-APPROVED CONTRACTOR: REDGWICK CONSTRUCTION CO. APPROVED CONSTRUCTION BUDGET AMOUNT: Original $2,225,000; modified to $2,053,300 in the 1991-92 CIP update. COUNCIL-APPROVED CONTRACT AMOUNT: $ 1,866,639.22 CHANGE AMOUNT CHANGE ORDER NO. 1 $ 7,467.90 CHANGE ORDER NO. 2 $ 967.34 CHANGE ORDER NO. 3 $ 3,586.00 CHANGE ORDER NO. 4 $ 3,367.00 CHANGE ORDER NO. 5 $ 33,100.00 CHANGE ORDER NO. 6 $ CHANGE ORDER NO. 7 $ CHANGE ORDER NO. 8 $ CHANGE ORDER NO. 9 $ CHANGE ORDER NO. 10 $ TOTAL OF ALL CURRENT AND PRIOR CHANGE ORDERS: $ 48,488.24 ADJUSTED CONTRACT AMOUNT: $ 1,915,127.46 PROGRESS PAYMENTS MADE: PAYMENT NO. 1 - $' 147,968.00 PAYMENT NO. 2 $ 143,634.00 PAYMENT NO. 3 $ 5,985.60 PAYMENT NO. 4 $ 171,379.10 PAYMENT NO. 5 $ 454,924.30 PAYMENT NO. 6 . $ 251,590.90 PAYMENT NO. 7 $ PAYMENT NO. 8 $ PAYMENT NO. 9 $ PAYMENT NO. 10 $ PAYMENT NO. 11 $ PAYMENT NO. 12 $ PAYMENT NO. 13 $ PAYMENT NO. 14 $ PAYMENT NO. 15 $ w• TOTAL PROGRESS PAYMENTS: $ 1,175,481.90 ti REMAINING BALANCE ON CONTRACT: $ 739,645.56 n: RECOMMENDATION: X APPROVED APPROVED APPROVED O1 DENIED DENIED DENIED J / . 'G SST Sup -wising City Manager Mayor 4. Dept. Head tip$• CITY OF DUBLIN - EXHIBIT "B" CONTRACT CHANGE ORDER NO. 5 PROJECT/ROAD: SAN RAMON ROAD IMPROVEMENTS PHASE IV PAGE 1 OF 1 PAGES FEDERAL NO. (S) M-A550(4) CONTRACT NO. 90-01 TO: REDGWICK CONSTRUCTION CO. 25599 HUNTWOOD AVE. , HAYWARD CA 94544 You are,hereby directed to make the herein described changes from the plans and specifications or do the following described work not included in the plans and specifications on this contract. NOTE: This Change Order is not effective until approved by the Chief Engineer. Description of work to be done, estimate of quantities, and prices to be paid. Segregate between additional work at contract price, agreed price, and force account. Unless otherwise stated, rates for rental of equipment cover only such time as equipment is actually used and no allowance will be made for idle time. The last percentage shown is the net accumulated increase or decrease from the original quantity in the Engineer's Estimate. EXTRA WORK AT AGREED PRICE: Contractor to install two rows of masonry blocks (one row split face, one row vertical scored) on top of the modified Type 50 soundwall/curb and gutter along the easterly side of the roadway. Dowels to be installed into the soundwall as an attachment for the blocks. The work shall be done at the agreed price of $16.55/ l.f. Estimated length of soundwall/curb and gutter on the easterly side is 2,000 l.f. TOTAL ESTIMATED'COST: $33,100 BY REASON OF THIS ORDER, THE TIME OF COMPLETION WILL BE ADJUSTED AS FOLLOWS: Additional six (6) working days. SUBMITTED BY: MWE DATE: 7/8/91 r .... APPROVAL RECOMMENDED: MWE DATE: 7/8/91 APPROVED, CHIEF ENGINEER, BY: DATE: We, the undersigned contractor, have given careful consideration to the change proposed and hereby agree, if this proposal is approved, that we will provide all equipment, furnish all materials except as may otherwise be noted above, and perform all services necessary for the work above specified, and will accept as full payment therefor the prices shown above. Accepted, Date: Contractor By: Title —If- the Contractor does not sign acceptance of this order, his attention is directed to the requirements of the specifications as to proceeding with the ordered work and filing a written protest within the time therein specified. PROPOSED BLOCK ADDITION AS ORIGINALLY PROPOSED I AS DESIGNED AND APPROVED I r � <�pF SAN RAMON RD SOUND BARRIER CHANGE ORDER