Thermalito Afterbay Western-Richvale Outlet Repairs

The California Department of Water Resources is forecasting a project titled Thermalito Afterbay Western-Richvale Outlet Repairs, located in Oroville, Butte County. The primary objective is to repair the outlet structure at the Western and Richvale canals. The scope of work includes replacing the hoist anchor to fix a gap between the base plate and gate 3, removing debris and sediment that fell from the embankment immediately upstream of the structures, and backfilling all voids adjacent to the outlet structure. Additionally, the project requires the replacement of fencing and the establishment of a dedicated parking spot for maintenance vehicles. The project is classified under NAICS code 237990 and is managed by Environmental Scientist Robin Carter-Ervin. According to the Notice of Exemption dated August 27, 2025, the work is categorized as a Class 1 categorical exemption under Section 15301, as it involves the repair and maintenance of existing facilities with no significant environmental impact. Performance will take place at the North Thermalito Afterbay on the water side of the Western and Richvale Canals.