AgdaPkt 2012-03-05 - Laserfiche WebLink

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6.1.C. - Page 1 RE PO RT To the Honorable Mayor and City Council From the Cit Mana er March 5, 2012 SUBJECT Award of Contract — Sanitary Sewer Pump Station No. 14 Improvements Project RECOMMENDATION Approve, by motion, the contract documents and award the standard form contract 00520 for the Sanitary Sewer Pump Station No. 14 Improvements Project to the lowest responsible bidder, Casey Construction, Inc. of Emerald Hills for their low bid of $369,918.00 and authorize the City Manager to increase the contract amount, if necessary, up to 10% of the amount awarded. BACKGROUND Redwood Shores has a total of 26 sewer pump stations. Over the past ten years, the city has made improvements to sanitary sewer pump stations 1, 2, 3, 10, 12 and 15, which are older pump stations built in the 1980's under outdated design standards, to improve the pumping efficiency, functionality both during normal operation and emergency conditions, ease of operation, safety and maintainability of the facility. Pump stations are selected for improvements after Engineering and Public Works Services staff evaluate the condition of the existing facilities. ANALYSIS Pump Station 14 conveys flow to Pump Station 15. This project focuses on the safety of the facility and on ensuring that adequate flows can be maintained during an emergency. Improvements will include installation of two new and larger 5 horsepower submersible pumps that attach to guide rails, which is part of our current design standards. This allows the pumps to be efficiently raised and lowered for servicing, which eliminates the need for maintenance staff to descend into the wet well. Other improvements include new variable speed drive controls to increase the efficiency of the pumps, new motor control center, new piping, rehabilitation of the wet well's interior surface to extend the useful life of the station, and a permanent emergency standby engine generator to replace an outdated engine generator and ensure continuous service of the pump station in the event of power failure.