Studies to Evaluate the Effectiveness of Outlet Flow-Control and Debris Control Devices at McNary and Little Goose Dams, 1998

摘要

During the 1998 spring and summer juvenile salmonid migrations, we conducted descaling evaluations and orifice passage efficiency (OPE) tests using a mark and release method at McNary Dam. Descaling and OPE tests were conducted in Turbine Units 4 and 5, which were equipped with extended-length submersible bar screens and inlet flow vanes, to evaluate outlet flow-control (OFC) and orifice shelter devices. In addition, dipnet recapture efficiency tests were conducted.