AgdaPkt 2009-10-12 - Laserfiche WebLink

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6.1 B Page 1 REPCJRT To the Honorable Mayor and City Council From the Ci Mana er October 12, 2009 SUBJECT Additional Construction Budget Request - Redwood City Recycled Water Project — Phase I — Bayfront Distribution System - Bid Package 8 (East Bayshore Road, Bair Island Road, Redwood Creek, Highway '101, and Maple Street) RECOMMENDATI4N Authorize, by motion, the City Manager to increase the contract amount up to 25% as necessary to complete the construction of this project contracted to Peak Engine�ring, Inc. BACKGROUND On February 9, 2009, the City Council awarded the construction for the Redwood City Recycled Water Project — Phase 1 — Bayftont Distribufion System — Bid Package 8 Project to the lowest responsible bidder, Peak Engineering, Inc., of San Francisco, for their responsive and responsible low bid of $949,45Q.00 and authorized the City Manager to increase the contract amount up to 14% if necessary. Sixteen bids were received at the bid opening on January 21, 24�9. The low bid of $949,450.00 from Peak Engineering, Inc., was 38% lower than the engineer's estimate of $'1,550,000.00 for the cost of construction. Staff attributed more bidders and lower bid amounts than typical to a very competitive bidding environment due to the economic downturn. This project is the ninth recycled water distribution pipeline construction project. The scope of work extends the recently installed recycled water transmission piping system in the Redwood Shores and Bair Island bike path areas to the Seaport Boulevard area, between Bair Island Road and Maple S#reet. More than 1,84� linear feet of PVC (polyvinyl chloride) and welded s#eel pipe, 24 inches in diameter, will be installed along East Bayshore Road, Bair Is�and Road, Redwood Creek, Highway 101, and Maple Street. Completion of this project, anticipated in October 2009, in conjunction with the completion of Bid Package 5A concludes constru�tion of Phase I of the recycled water transmission piping system. At that point, service will be available to all Redwood City customers east of Highway 101. Change orders are representative of unanticipated work to accommodate unforeseeable site conditions on this project. As of September 1, 2009, Bid Package 8 was 60% complete and change orders totaling approximately $54,841.00 have been issued. The remaining 40% of the work, af the Highway 101 State bridge crossing over Redwood Creek, is the most challenging portion of the project and an additional $130,710.00 is estimated as required to complete this construction. Unforeseeable site conditions on this project have required additional work that incfudes modifying bridge pipe supports, revising the bridge pipe alignment due to the depth of the bridge foundation, adding an epoxy coated steel pipe due to utility conflicts, and adding steel we�ding. The condi#ions