Project Description 

This project replaces 2.9 miles of cast iron water mains with welded steel pipe. Owned by Marin Water, these mains are large underground sections of pipeline that carry drinking water from Marin Water’s pumping stations to customer properties. This project will also replace 197 service laterals, which is Marin Water-owned piping that connects the water main to the service meter and subsequent customer-owned piping.

Project Fact Sheet

• Review in English or Spanish (PDF)

Benefits

This project will replace Marin Water's aging underground water infrastructure along various streets in Marin City. The improvements will help reduce water loss due to leaks and strengthen the overall resilience of the community’s drinking water system. The existing cast iron pipeline is leak-prone, and the community has experienced several large leaks resulting in disruption in water service at various times over the years. New seismically resilient welded steel pipe will replace the existing cast iron water main, and new service laterals from the main to the service meters will also be replaced with this project.

Schedule and Status

• Design: Summer 2022 - Winter 2023/24
• Phase I Construction: Spring 2024 - Winter 2024/25
• Phase II Construction: Winter 2024/25 - Fall 2025

Funding Sources 

This project is largely funded through part of a larger $6.4 million grant awarded by the California Department of Water Resources. The remainder is funded through Marin Water's Capital Maintenance Fund.

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