San Geronimo Pipeline Upgrade Project

planned

The project involves replacing seismically vulnerable segments of a pipeline that carries untreated water across the San Geronimo Creek. The pipeline, part of the North Marin Line constructed in 1957, conveys raw water from Kent Lake and Nicasio Reservoir to the San Geronimo treatment plant. The upgrade includes installing about 1,700 feet of pipe under Sir Francis Drake Boulevard at Lower Peters Dam Road, relocating a valve, removing old pipe and concrete pilings in the creek, and replacing the pipe crossing the creek from Nicasio Reservoir with a new 36-inch pipe elevated on a steel truss. The project aims to ensure the pipeline's operability and reduce risks of debris buildup and damage.