Marsh Creek Reservoir Restoration and Total Mercury Reduction Project

The Marsh Creek Reservoir Restoration and Total Mercury Reduction Project, managed by Contra Costa County in California, is a multi-benefit initiative designed to enhance flood capacity, water quality, and public recreation while improving the local ecosystem. The scope of work involves excavating excess sediment and debris from the reservoir's wet pool, drying and disposing of the material onsite, and installing a high flow diversion. Additionally, the project includes habitat restoration, the cleaning and maintenance of the primary outfall and gate operations, and the installation of cattle exclusion fencing. Identified as Project No. WO8104, CP#23-35, this effort is currently listed as a forecast with a posted date of August 12, 2026. The project will be performed in California, specifically within the 94513 zip code area. Key points of contact for the initiative include Senior Planner Syd Sotoodeh and Environmental Analyst III Laura Cremin.