J. C. Boyle Hydroelectric Project Spillway Model Study

by Thomas C. Demlow, Engineering Hydraulics, Inc, United States,
Timothy C. O'Connor, Engineering Hydraulics, Inc, United States,
George S. Bingham, Engineering Hydraulics, Inc, United States,



Document Type: Proceeding Paper

Part of: Waterpower '89

Abstract:

The J.C. Boyle Hydroelectric Project is an 80 MW facility near Klamath Falls, Oregon. The project consists of a concrete canal, tunnel, parallel penstocks and two Francis turbines. Upstream of the tunnel section the canal widens to form a forebay and spillway used to control transients when a unit shuts down. Since the project was commissioned in 1958 a large ravine has developed at the end of the spillway and sections of the chute has been undermined and lost. The hydraulic design of the chute termination structure and protection scheme in the ravine was developed using a physical model. The chute termination structure was constructed in prefabricated prestressed sections and cantilevered out over the ravine. The plunge pool protection scheme was constructed from existing boulders repositioned to form a pervious dike.

Subject Headings: Hydro power | Spillways | Project management | Hydraulic models | Hydraulic design | Stream channels | Drop structures | Oregon | United States

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