Crystal Springs Pipeline No. 2 extends from a point near the CSPS in unincorporated San Mateo County to the University Mound Reservoir in San Francisco. The pipeline is primarily 60-inch-diameter pipe with a 3.2 mile section that is 54-inch-diameter pipe. The purpose of the project is to improve seismic reliability of the pipeline.
Description
The major project elements consist of:
- Seismic reliability improvements, which include replacing or relocating a total of 1.7 miles of pipe at 12 locations, sliplining 3.5 miles of pipe, retrofitting pipe bridge pier supports at two creek crossings, providing a new connection at the CSPS, and providing a connecting segment with a blind flange for later connection to the New Crystal Springs Bypass Tunnel. The tie-in to the New Crystal Springs Bypass Tunnel will be performed under project CUW-35601, eliminating the need for a second shutdown of the CSPL No. 2.
- Installation of a new isolation valve at the CSPS.
- Facility improvements, which include installing fences and enclosures for exposed facilities, concealing exposed portions of pipe, and painting exposed portions of pipe.
- Upgrading the cathodic protection system along the length of the pipeline.
Scope Refinements
The original project description was based on a condition assessment that was only partially complete. The description therefore contained assumptions regarding the amount of pipe replacement and sliplining that would be required. Those assumptions included replacement of 6 to 7 miles of pipe and 9 miles of either sliplining or relining. The final condition assessment determined that a significantly reduced amount of pipe replacement and relining in the current scope is required.
Contact Suzanne Gautier at (415) 554-3204, email at sgautier@sfwater.org
or Jim Chien at (415) 554-3244, email jchien@sfwater.org
The purpose of the Crystal Springs Pipeline No. 2 Replacement Project is to ensure a safe and reliable water supply for eight Bay Area cities and the County of San Mateo. Cities included in this project are: Burlingame, Millbrae, San Bruno, South San Francisco, Brisbane, Daly City, Hillsborough and San Francisco. During the construction, no interruption of water service is anticipated. Read more
At a May 11 meeting, Residents of the Portola District learned about several important Water System Improvement Program (WSIP) projects that will take place in their neighborhood over the next few years.Read more
