East Branch East Weaver Creek Migration Barrier Removal

The East Branch East Weaver Creek Migration Barrier Removal project, managed by the Trinity County Department of Transportation in Weaverville, California, involves replacing an existing 8 by 60 foot elliptical CMP culvert with a 15 foot 9 inch by 8 foot by 66 foot aluminum box culvert. This infrastructure upgrade is designed to remove a fish migration barrier to increase habitat for listed Coho salmon and improve flow capacity for Q100 flows of East Branch Creek. The installation includes wing and head walls, a natural stream bottom configuration, and boulder clusters within the channel. The project is categorized as a forecast under NAICS code 237990 and has been granted a CEQA categorical exemption as it replaces an existing facility without expanding roadway capacity. Construction activities and ground disturbing work are strictly limited to a Limited Operating Period from June 15th through October 15th. The project will implement a detour expected to last between one and three weeks with hourly openings. Contractors must adhere to rigorous environmental and fire safety standards, including the use of USFS approved spark arrestors, maintaining on-site fire suppression caches and water trucks, and following the 5Cs Water Quality and Stream Habitat Protection Manual. Compliance with the North Coast Regional Water Quality Control Board and California Department of Fish and Wildlife is required, with specific mandates for daily equipment leak inspections and visual surveys for bird nests.