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REPORT <br />To the Honorable Mayor and City Council <br />From the City Manager <br /> <br />November 9, 2015 <br /> <br />SUBJECT <br />Amendment No. 1 to Design Services Agreement with Carollo Engineers, Inc. for <br />consulting engineering services to support the design and construction of the Bair Island <br />Storm Drain Pump Station <br /> <br />RECOMMENDATION <br />By motion, approve and authorize the City Manager to execute Amendment No. 1 to the <br />Design Services Agreement with Carollo Engineers, Inc. for consulting engineering <br />services for the Bair Island Storm Drain Pump Station in an amount of $63,515.00, for <br />an aggregate amount of $282,299.00. <br /> <br />BACKGROUND <br />The City systematically replaces aging storm infrastructure to ensure the continued <br />reliability of the system. The existing Bair Island Storm Drain Pump Station (BISDPS) <br />was constructed circa 1974 as part of the Bair Island Road Improvements Project. The <br />pump station consists of two (2) vertical shaft mixed-flow 40 horsepower pumps, a <br />manual trash rack and 24” diameter discharge force main. The pump station receives <br />flow from the storm collection system along Bair Island Road and pumps it into <br />Redwood Creek. <br /> <br />The pump station is also being relocated in advance of the planned vehicular bridge <br />extending from Blomquist Street to Bair Island Road. It is anticipated that the existing <br />pump station is in conflict with the future bridge abutments thus requiring the need to <br />relocate the pump station. <br /> <br />Staff issued request for proposals (RFP) to six qualified professional engineering design <br />firms. Based on evaluating all proposals, staff recommended and City Council approved <br />on January 13, 2013 a professional engineering services agreement with Carollo <br />Engineers, Inc. for this project. Carollo completed the design and prepared plans and <br />specifications that were used for the construction of BISDPS. <br /> <br />During construction, it was discovered that a sanitary sewer force main operated by <br />Silicon Valley Clean Water (SVCW) was within the immediate vicinity of the project site. <br />Work was suspended in consideration of the potential risk to the SVCW sewer pipeline. <br />SVCW has since constructed and began operating a new sanitary sewer force main <br />pipeline. SVCW is in the process of decommissioning the original force main. As of this <br />month, the sanitary sewer pipeline that was near the pump station project site is no <br />6.1.A. - Page 1