Second Lower Feeder PCCP Rehabilitation

Butier Engineering, Inc. provided construction management and inspection services for the rehabilitation of Reaches 3A and 3B of the Second Lower Feeder, a vital pipeline built in 1967 that delivers treated water from the Robert B. Diemer Water Treatment Plant in Yorba Linda to the Palos Verdes Reservoir in Rolling Hills Estates. The project spanned multiple cities and required coordination with various agencies, including Caltrans, DSOD, and the U.S. Army Corps of Engineers.

Butier’s team managed construction across three tightly scheduled shutdown phases, each requiring precise planning and execution within limited timeframes. Despite the challenges, all shutdowns were completed on time and within budget. In total, the projects rehabilitated approximately 25,500 linear feet of prestressed concrete cylinder pipe (PCCP) along the Second Lower Feeder.

Scope of Work

• Excavation access portals and removal of portions of existing PCCP for pipeline access
• Transportation and installation of steel liner pipe
• Expanding and welding the steel liner pipe, grouting the annular space, applying cement mortar lining, and modifying pipeline appurtenant structures
• Installation of bulkhead and gooseneck piping
• Disinfection of pipeline, restoration of the site, controlling traffic, abatement of hazardous materials, and other appurtenant work
• Reach 3B included rehabilitation of three isolation valve structures and two service connections, and installation and removal of the Palos Verdes Reservoir temporary bypass line