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Model Studies for Potential Modification of Pardee Spillway

by Charles E. Sweeney, Engineering Hydraulics Inc, Redmond, WA, USA,
Andrew M. Bell, Engineering Hydraulics Inc, Redmond, WA, USA,
Thomas C. Demlow, Engineering Hydraulics Inc, Redmond, WA, USA,



Document Type: Proceeding Paper

Part of: Water Power '87

Abstract:

East Bay Municipal Utility District, a public water supply agency in the San Francisco Bay Area, is examining the spillway adequacy of its primary water supply reservoir. Flood routing studies indicate that a PMF would exceed the existing spillway capacity. Conceptual designs were developed for alternatives to increase the spillway capacity and prevent dam overtopping. Hydraulic aspects of these alternatives were designed to increase spillway capacity, prevent chute wall overtopping, and reduce downstream scour potential. The performance of the existing spillway and alternative designs were tested using a physical hydraulic model. Erodible bed model studies were undertaken to assess the potential for scour and undercutting of the spillway. A flip bucket energy dissipator was designed and tested in the model.

Subject Headings: Spillways | Hydraulic models | Hydraulic design | Scour | Hydro power | Wave overtopping | Water supply | San Francisco Bay Area | California | United States

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