Northwest Fisheries Science Center

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Document Type: Report
Center: NWFSC
Document ID: 7731
Title: Efficiency evaluation: Tracy Fish Collecting Facility, Central Valley Project, California
Author/Editor: Daniel W. Bates, Orren Logan, Everett A. Pesonen
Year: 1960
Institution: U.S. Fish and Wildlife Service, Bureau of Commercial Fisheries and U.S. Bureau of Reclamation

Based on tests in both the primary and secondary louvers, collection efficiency at Tracy ranged 65-100%, depending on species, size of fish, and flow velocity.  However, efficiency will exceed 90% most of the time, particularly now that debris removal has been improved and assuming turbulence in the secondary system will be decreased.

The associated facilities operated satisfactorily with the exception of the point of primary bypass discharge into the secondary, the sampling equipment for counting, and the trash rack.  A boom to deflect heavy trash from the trash rack was completed in summer 1960 to alleviate the trash problem, and sampling equipment for counting fish was developed.  A temporary installation in the secondary system has reduced turbulence which caused holdup and loss of fish.  Permanent modifications to alleviate the turbulence problem remain to be designed and constructed.

Notes: 70 pages, plus appendices