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Crystal Springs / San Andreas Transmission Upgrade (WSIP)

Underwater work at the Lower Crystal Springs Reservoir will continue through August 2013.

Project Update
Underwater construction is in progress at both the Lower Crystal Springs Reservoir and San Andreas Lake. Barges, cranes and other equipment are visible in the water from Highway 280 and from nearby roads and trails. Bright yellow booms cross the water in several locations. The booms, called silt curtains, descend underwater to block plants and animals from entering work zones. These curtains also protect water quality by containing disturbed sediment.

Through 2013, divers will work on the outlet structures, tunnels and pipes that move water from the reservoirs to the Harry Tracy Water Treatment Plant. Construction is taking place at depths up to 110 feet.

The new Crystal Springs Pump Station will increase our capacity to supply water after a major earthquake.

Trail maintenance is ongoing at Sawyer Camp Trail in partnership with San Mateo County Parks. Short intervals of trail closure can be expected to complete the work.

Work also continues on the new Crystal Springs Pump Station, a major seismic upgrade project alongside Lower Crystal Springs Dam. It will improve the way we pump Hetch Hetchy water through the Peninsula regional system.

Given the environmental sensitivity of the Peninsula Watershed, the project team is carefully focused on protecting species and water quality.

The Crystal Springs Reservoir System serves as the emergency water supply for over one million people in San Mateo and San Francisco Counties.

Project Description
The Crystal Springs/ San Andreas (CSSA) Transmission System is a series of inlet and outlet structures, pipelines and pumping facilities that move water from the Crystal Springs Reservoirs north to San Andreas Lake and the Harry Tracy Water Treatment Plant, and then into the water distribution pipelines. This system ensures that the Peninsula’s emergency and supplemental water supply can be quickly moved into the water pipes leading to our taps.

In December 2010, the SFPUC and our Contractor, Kiewit Infrastructure West, began the process of seismically reinforcing and improving the reliability of the CSSA system.
The project area (including all construction, staging, and access areas) covers approximately 135 acres and is composed of seven distinct project components running approximately 7.6 miles across the Peninsula Watershed.

The project includes upgrades to the water transmission pipeline adjacent to the Sawyer Camp Trail, the outlet structures at Crystal Springs and San Andreas reservoirs, the Upper Crystal Springs Dam culverts, and the construction of a new Crystal Springs Pump Station.

Project Information

    December 2010
    November 2014
  • COST
    $201 million

Additional information

The information shown reflects the current forecast information published in the latest WSIP Quarterly Report.



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