Antelope Creek Wildlife Crossing Repair
Client: US Fish and Wildlife Service
The Paynes Creek crossing on Antelope Creek within the California Department of Fish & Game (CDFG) Tehama Wildlife Area was a barrier at certain flows for adult spring-run and fall-run Chinook salmon. The crossing was a shallow ford through the streambed constructed of metal sheet plate and grates. Questa, working with the U.S. Fish & Wildlife Service (USFWS) and the CDFG, recommended a clear-span bridge to replace the existing low-flow crossing. Questa compiled basic information on the existing conditions of the site, including initial environmental and engineering studies that quantified the hydrologic and hydraulic environment, investigated the existing geomorphic pattern of the stream, and documented any significant structural constraints.