AgdaPkt 2016-04-25 Closed and Joint SA PFA

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6.1.F. - Page 1 REPORT To the Honorable Mayor and City Council From the City Manager April 25, 2016 SUBJECT Award of Contract —Walnut Street and Maple Street Sewer Interceptor Improvement Project RECOMMENDATION By motion, approve, and authorize the City Manager to execute the contract documents and award the standard form contract 00520 for the Walnut Street and Maple Street Sewer Interceptor Improvement Project to JMB Construction, Inc. of South San Francisco, CA for their responsive and responsible low base bid of $2,708,000.00 and authorize the City Manager to increase the contract amount, if necessary, up to 10% of the amount awarded BACKGROUND The existing Walnut Street sewer trunk main was constructed circa 1970. It is a 48-inch diameter gravity sewer main that conveys the flows from the west side of U.S. Highway 101 to the Maple Street Pump Station located east of the highway. All wastewater generated west of U.S. Highway 101 is carried through this single pipeline to the Maple Street Pump Station and subsequently pumped into the Silicon Valley Clean Water (SVCW) conveyance system for treatment at the SVCW's wastewater plant. The Walnut Street Sewer Interceptor Project is necessary to ensure the reliability of the wastewater collection system. This existing pipeline will remain in service and a new pipeline will be constructed to improve the reliability of the sanitary sewer system. Council awarded the final engineering design and construction administration for the project on January 13, 2014 to Kennedy/Jenks Consultants of San Jose, CA. The project was advertised with bids opened on February 24, 2016, and upon the recommendation of City Staff, Council rejected all bids on March 28, 2016. Staff made revisions to the Contract Documents and re-advertised the project as directed by Council. ANALYSIS The project consists of the following improvements: 1) Demolition and Abandonment of Existing Utilities. 2) Perform Sewer Bypass as needed to construct project. 3) Jacking and Receiving Shafts for tunneling operations.