West Marin Drainage Rehabilitation



A culvert assessment was conducted to assess potential structural deficiencies of approximately 150 culverts along 14-miles of roadways in unincorporated areas of West Marin. The culvert assessment report identified 32 road culverts requiring improvement due to dilapidated conditions that could lead to issue relating to flooding risk, public safety, and environmental regulations.  In addition, this project will address 3 roadside bank slip outs.


This project is funded by the County Road & Bridge Fund.

Traffic Impacts

There will likely be traffic impacts during construction with delays, which are expected to be less than ten minutes at a time.


Summer 2023

  • Anticipated start of construction
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