The SFPUC repaired and replaced segments of a 19-mile pipeline known as Crystal Springs Pipeline No. 2. As one of the oldest and most central water mains in the regional system, the pipeline was installed in the early 1900s. The goal of this project was to create sustainable and reliable water system infrastructure that supplies San Francisco and neighboring cities with potable water drawn from the Hetch Hetchy Reservoir. Sections of the pipeline were relocated to avoid unstable surfaces that surround the pipe. Retrofitting of the pipe bridge was supported at two locations to withstand seismic events. New sections of pipes were added into the existing pipeline to strengthen the pipe wall. The water system was refined to minimize the potential of corrosion in the pipe and some sections of the pipeline were replaced with thicker welded steel pipe.
KKCS provided cost estimating and scheduling services. Construction methods included open sliplining, weld tests, and hydro-testing of finished sections. Primavera 7 was used to review the contractor's schedule and create weekly, monthly, and time impact analysis reports. KKCS supported the CM team in their responsibility to monitor and control the construction work by reviewing the cost impact of change order requests as well as analyzing the contractor's cost and resource loaded schedule. KKCS recommend corrective actions and change conditions activities to keep the construction effort on schedule and within budget.
San Francisco Public Utilities Commission (SFPUC)
San Francisco, CA