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6.A. - Page 1 of 4 <br />/<�ik <br />Redwood <br />CitylCallifornia <br />Faunded 1867 <br />A,&/ <br />DATE: January 11, 2021 <br />SUBJECT <br />STAFF REPORT <br />To the Honorable Mayor and City Council <br />From the City Manager <br />Final acceptance of Peninsula No. 2 Potable Water Tank Seismic Improvement Project <br />RECOMMENDATION <br />By motion, accept the Peninsula No. 2 Potable Water Tank Seismic Improvement Project and authorize <br />the release of bonds and retention according to City procedures. <br />STRATEGIC PLAN GUIDING PRINCIPLE <br />Public Safety <br />BACKGROUND <br />On April 13, 2020, the City Council awarded the construction contract for the Peninsula No. 2 Potable <br />Water Tank Seismic Improvement Project to Valentine Corporation of San Rafael California for a price of <br />$1,298,369.00. The Peninsula No. 2 Water Tank is one of two critical water tanks serving the Redwood <br />Shores area. The project scope included strengthening the tank foundation by driving additional steel piles <br />and constructing load transfer concrete slabs, as well as installing flexible pipe -to -tank connections to limit <br />pipe or tank structural damage during an earthquake. The finished work strengthens the ability of the <br />tank to resist strong lateral seismic forces, thereby, ensure its continuous service after an earthquake, and <br />extend the tank's useful life. <br />Specific project components include: <br />• Driving sixty-four battered 12 -inch diameter steel piles; <br />• Constructing thirty-two concrete pile caps and load transfer slabs; <br />• Installing three flexible connectors to connect tank to exterior pipelines; <br />• Replacing a segment of the existing tank sub -drain with a flexible pipe; <br />• Disinfecting and testing pipes and fittings; and <br />Page 1 of 3 <br />City of Redwood City 1017 Middlefield Road, Redwood City, CA. 94063 Tel: 650-780-7000 www.redwoodcity.ore <br />5 <br />