Wallace Weir and Colusa Basin Drain - Fish Salvage Operations
Colusa Basin Drain and Wallace Weir
and Relocation Efforts (courtesy of CDFW)
Due to various anthropogenic impacts to California’s natural waterways, migration cues for anadromous fish species have been disrupted and lead to increased straying into man made drainages found within the Yolo Bypass (Bypass) and Colusa Basin Drain (CBD). Some of the fish observed in these drainages are threatened and endangered species such as winter and spring-run Chinook salmon, Central Valley Steelhead and Green sturgeon. As such, salvage efforts are necessary to aid in recovery and give stranded individuals a chance to reach spawning grounds and contribute to the spawning population. The data gathered from these salvage efforts has provided the California Department of Fish and Wildlife a better understanding of the specific environmental triggers that lead to adult straying into the Bypass and CBD. This data also helps to inform water management decisions and restoration efforts in the Bypass.
- Data Access