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Construction Projects

Marin Water Worker with Mt. Tam in the background

We are proud of our rich history as California’s first municipal water district, established in 1912. With that distinction, comes the responsibility to address our aging infrastructure. Many of our pipelines are more than 100 years old. Our Capital Improvement Program responsibly replaces aging pipelines with pipes that better withstand earthquakes and have greater overall reliability. 

If you have questions about Marin Water’s construction projects, please contact our Engineering Division at 415.945.1560.

Current Projects

Sir Francis Drake Boulevard Pipeline Replacement Project

Marin Water is installing a new pipeline under a portion of Sir Francis Drake Boulevard in Kentfield, replacing old pipes that date back to 1920. The new pipeline, which also has features that will improve its seismic reliability, is part of our ongoing work to upgrade aging infrastructure and improve the overall reliability of our system. The cost of the project is $3.9 million, and the majority of the work will occur at night to minimize traffic disruptions. Drivers in the area can expect partial lane closures and some traffic delays.

Construction is being done in tandem with Marin County’s Sir Francis Drake Boulevard Rehabilitation Project to reduce costs and minimize disruptions. Construction began in June and continues through June of 2022. For more information about the County's project, visit

Fifth Avenue Pipeline Replacement Project

Marin Water is replacing nearly 4,000 feet of pipe in San Rafael to improve fire flow to the area. The contractor is currently installing mainline pipe and service transfers. To date approximately 3,270 feet of 18-inch pipe have been installed.

Southern Marin Pipeline Replacement Project

This project involves the replacement of over 5,000 feet of pipe in Tiburon and Belvedere, in coordination with the City of Belvedere’s earthquake resiliency program and Sanitary District No. 5’s Cove Road Force Main Replacement Project and planned paving work to minimize public impacts.

The contractor is currently installing mainline pipe on Cove Rd, Beach Rd, Main St and Round Hill Rd. To date, approximately 2,500 feet of 8 and 6-inch water main have been installed. Work on the pipeline in Harrison Street in Sausalito is scheduled to begin in early May.