Turbine Intake Modification for Fish Passage

by Fahmi Ismail, US Army Corps of Engineers, Portland, OR, USA,
Richard Vaughn, US Army Corps of Engineers, Portland, OR, USA,
Ronald Walker, US Army Corps of Engineers, Portland, OR, USA,

Document Type: Proceeding Paper

Part of: Water Power '87


This paper describes one solution the U. S. Army Corps of Engineers has found to improve juvenile fish guidance at Bonneville Second Powerhouse on the Columbia River. Juvenile fish passage did not meet the expected percentage of success. Model testing indicated that flow patterns and thus juvenile fish guidance could be improved by adding turbine intake extensions to the upstream face of the powerhouse. The design team investigated the feasibility of four different geometric configurations using various materials. Using preliminary calculations, it was concluded that the geometric configuration which was best for the fish guidance was feasible to construct. The paper will focus upon loading conditions, support of the structures, methods of design analysis, fabrication and solutions to the installation problems.

Subject Headings: Turbines | Fish management | Rivers and streams | Geometrics | Hydraulic design | Hydraulic loads | Hydro power | Water intakes

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