Project Update
Concrete Pours for New Treated Water Reservoir plus Major Electrical Upgrades
This spring, the project is conducting concrete pours for the base slab of the 11 million gallon treated water reservoir (TWR). The base slab is divided into four quadrants for four intensive days of work. At the same time, a small TWR chemical injection vault is being formed and poured. Steel wall forms, column forms and rebar will be installed this summer in preparation for the reservoir concrete wall and column pours. Construction at Harry Tracy is approximately 40% complete.
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Construction of new filter gallery
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Recent welding work at the treated water reservoir. |
The Contractor is upgrading the electrical system at the Harry Tracy Plant’s Raw Water Pump Station and Standby Power Building near the Helen Drive gate in Millbrae. From excavation and installation of underground conduits to commissioning and testing of new electrical equipment, this will be one of the most critical work activities of the spring. Temporary outdoor lighting may be visible to our neighbors, however, night work will primarily be inside the facilities. The Contractor has measures in place to monitor noise and minimize disruption to surrounding neighborhoods.
Harry Tracy water washes a concrete truck exiting the Plant
All trucks are cleaned at a tire wash station before leaving the plant to prevent tracking dirt onto Crystal Springs Road. Pilot cars will continue to escort trucks along the road to maintain safe driving speeds and to ensure safety.
Wildlife Conservation at Harry Tracy
As warm weather approaches, reptiles and amphibians emerge from their winter hibernation. In order to protect special-status species like the San Francisco garter snake and California red legged frog, in addition to other wildlife, we train our staff and contractors to identify protected species, slow down when driving and check under tires before moving parked vehicles.
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| Dark-eyed junco at Harry Tracy Water Treatment Plant. |
Bird deterrent boxes have been placed on site for the spring nesting season. They project a variety of bird calls to discourage nesting in construction areas. SFPUC environmental inspectors also conduct site surveys to avoid impacts on nesting birds.
Project Description
The Harry Tracy Water Treatment Plant, in conjunction with the Crystal Springs Reservoir System (Upper and Lower Crystal Springs Reservoirs) and San Andreas Lake, serves as the emergency back-up and supplementary water supply system for the entire San Francisco Peninsula. Local watershed runoff, along with water from Hetch Hetchy and East Bay sources, is stored in the reservoir system, then feeds into the Harry Tracy Water Treatment Plant, and subsequently is delivered to customers.
This project’s goal is to improve delivery reliability and provide seismic upgrades at this regional water treatment plant to achieve a sustained capacity of 140 million gallons per day (mgd) for at least 60 days, and to provide 140 mgd within 24 hours following a seismic event on the San Andreas Fault. The sustainable capacity will be provided through the addition of filters, upgrades to various systems, and seismic retrofits of critical process units.