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REPORT <br />To the Honorable Mayor and City Council <br />From the City Manager <br /> <br />March 28, 2016 <br /> <br />SUBJECT <br />Reject all Bids – Walnut Street and Maple Street Sewer Interceptor Improvement <br />Project <br /> <br />RECOMMENDATION <br />Reject all bids and authorize staff to readvertise this project for public bidding. <br /> <br />BACKGROUND <br />The existing Walnut Street sewer trunk main was constructed circa 1970. It is a 48-inch <br />diameter gravity sewer main that conveys the flows from the west side of U.S. Highway <br />101 to the Maple Street Pump Station located east of the highway. All wastewater <br />generated west of U.S. Highway 101 is carried through this single pipeline to the Maple <br />Street Pump Station and subsequently pumped into the Silicon Valley Clean Water <br />(SVCW) conveyance system for treatment at the SVCW’s wastewater plant. The Walnut <br />Street Sewer Interceptor Project is necessary to ensure the reliability of the wastewater <br />collection system. This existing pipeline will remain in service and a new pipeline will be <br />constructed to improve the reliability of the sanitary sewer system. <br /> <br />Council awarded the final engineering design and construction administration for the <br />project on January 13, 2014 to Kennedy/Jenks Consultants of San Jose, California. <br /> <br />ANALYSIS <br />The project consists of the following improvements: <br />1) Demolition and abandonment of existing utilities. <br />2) Perform sewer bypass as needed to construct project. <br />3) Jacking and receiving shafts for tunneling operations. <br />4) Installation of 60-inch sewer pipe using trenchless methods beneath <br />Highway 101. <br />5) Sewer diversion structures including stop logs. <br />6) Open cut installation of 18, 48, and 60-inch sewers and associated manholes. <br />7) Final paving site restoration and seal coating of streets. <br /> <br />The six bids received at the bid opening on February 24, 2016, are summarized in the <br />table below. <br /> <br /> <br />6.1.C. - Page 1