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Construction Updates

Marin Water Worker with Mt. Tam in the background

Marin Water is proud of its rich history as California’s first municipal water district, established in 1912. With that distinction, comes the responsibility to address aging infrastructure. Many of the district's pipelines are more than 100 years old. The Capital Improvement Program responsibly replaces aging pipelines with pipes that better withstand earthquakes and have greater overall reliability. For any construction project questions, please contact the Engineering Division at 415.945.1560.


Active Construction Projects

Fire & Fuels Management 

With nearly 22,000 acres of public land within the Mount Tamalpais Watershed and the hills of west Marin under our care, the District continues to engage in critical vegetation management work. The ongoing, strategic efforts follow the District's Biodiversity, Fire and Fuels Integrated Plan, which is designed to not only reduce the risk of devastating wildfire, but also bolster ecological health through the removal of invasive plant species. Learn more

Pine Mountain Tanks Project

The Pine Mountain Tunnel was constructed in 1919 to convey water from Alpine Reservoir to Fairfax and San Rafael and was converted to a water storage facility in 1971 and remains in that use today. Replacing the 100-year-old tunnel with two 2-million gallon concrete tanks will enhance water system resiliency and replaces aging infrastructure on the District’s watershed. Learn more

Azalea Hill Restoration 

The Azalea Hill Trail restoration project consolidates use on the two existing routes proposed for upgrades and provides a much-needed connection and safety improvement between the “Lakes” and “Pine Mountain” areas. When complete, the project will result in the removal of more than 4 miles of non-system roads and trails and reduce risk of erosion considerably. Learn more

Treehaven Pipeline Replacement 

Part of Marin Water's Fire Flow Improvement Program, the Treehaven Pipeline Replacement project will install more than a mile of aging, leak-prone pipeline with larger, more seismically stable pipe. Ultimately, this project will increase the volume of water available to fight fires. Learn more.

Worn Spring Road Slide Repairs

Heavy rains in January caused a portion of Worn Spring Road near Phoenix Lake to fail. The road is not only an important access point for emergency vehicles and recreators, it also sits next to a water transmission line that supplies treated water to Ross Reservoir - the primary treated water storage facility for Marin Water customers in Ross Valley. The work, which is expected to last three months, will shore up this important route with a reinforced retaining wall. Learn more