Seismic and reliability upgrades are continuing at over 20 locations inside the Harry Tracy Water Treatment Plant. The Plant will undergo an intensive period of work from October 15 through December 15th.
During this period, the Contractor expects to complete a seismic upgrade of the water pipeline located underground along the hillside behind Meadows School in Millbrae. A new steel pipe will be placed inside the existing pipe in a process called sliplining. The pipeline conveys drinking water from the Harry Tracy Water Treatment Plant to the Peninsula.
Building a modern, seismically sound, 11 million gallon treated water reservoir is a complex endeavor.
The new 11 million gallon treated water reservoir is over 60% complete as its concrete walls are forming into a full circle. The Contractor has started building the 49-foot tall columns which will support a “floating” cap with points of contact rather than an attached roof, to help the reservoir withstand a major seismic event.
Work is also progressing on new filters, retrofitting and installing critical process and electrical equipment, and upgrading piping systems. A swing shift will continue to operate until 2:00 a.m. most Mondays through Saturdays. Construction lights used in work areas may be visible during the evenings; however, the Contractor is working to minimize any disruption to neighbors.
Our Contractor, Kiewit Infrastructure West Co., is working in multiple areas within the Harry Tracy Plant, part of the Hetch Hetchy Water System Improvement Program. Seismic retrofits and electrical upgrades will allow us to reliably provide up to 140 million gallons of water per day, for 60 days, within 24 hours of a major earthquake. Harry Tracy serves several communities on the Peninsula in addition to San Francisco.