Physical Model Study of Enlarged Fish Ladders for Red Bluff Diversion Dam.Appendix B. Data Results. Final Investigations. Red Bluff Diversion Dam. Fish Passage Program

摘要

The Bureau of Reclamation, Water Resources Research Laboratory, conducted aphysical model study to determine the potential of enlarged fish ladders to improve adult fish passage at Red Bluff Diversion Dam (RBDD). Ineffective fish passage at RBDD has been identified as a contributing factor in the decline of the anadramous fishery resource along the Sacramento River in California. This study was requested under the recently initiated Red Bluff Fish Passage Program (a combined effort of the Bureau of Reclamation, the U.S. Fish and Wildlife Service, the National Marine Fisheries Service, and the California Department of Fish and Game). The results indicate that enlarged ladders have significant potential for generating improved near and far field attraction flow conditions in the diversion dam tailrace, compared with existing ladders. Furthermore, recommended diversion dam operating conditions associated with the proposed enlarged ladders have been identified. These results are intended for use in the development and implementation of solutions for improving fish passage at Red Bluff Diversion Dam.