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SFPUC updates commissioners on complex Headworks project, warns bids running above estimates
Summary
Project manager Jignesh Desai told commissioners the Headworks upgrade is in active construction but recent bids are running roughly 20% above the May 2018 95% estimates; the design will increase grit and screening removal from roughly 50% to about 90% and staff described geotechnical piling that does not go to bedrock.
Project manager Jignesh Desai told the San Francisco Public Utilities Commission that the Headworks facility upgrade has moved multiple packages into construction but faces higher-than-expected bids that will affect the remaining work. “The current headworks doesn't do a good job in removing the grit and screening,” Desai said, adding that the new design should raise removal “up to 90%” compared with roughly 50% today.
The commission was reminded that the delivery method in use — construction manager/general contractor (CMGC) — lets designers and contractors work together early to reduce risk and sequencing problems. Desai said Scope 1 (site preparation) is roughly 75% complete, Scope 2B has moved into advertisement and Scope 3 into…
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