Studies to evaluate the effectiveness of extended-length screens at Little Goose Dam, 1993

Additional testing was done with the extended-length bar screen at McNary Dam during the 1992 outmigration, with similar FGE results (McComas et al. 1993) . These studies led to the development and prototype testing of extended-length bar screens and extended-length traveling screens with various perforated plate porosities at Little Goose Dam in 1993. This report covers the first year of the evaluation of these devices. Specific research objectives for 1993 were: 1) Evaluate the ability of extended-length traveling screens and extended-length bar screens to guide fish during the juvenile salmonid outmigration. 2) Determine the effect of extended-length screens on descaling of juvenile salmonids. Contract no. E86920164