Unsteady Spillway Inlet Conditions at the Weatherford Water Supply Reservoir

Document Type

Conference Paper

Journal/Book Title/Conference

1994 National Conference on Hydraulic Engineering


Buffalo, New York

Publication Date



The Weatherford Water Supply Reservoir, in Weatherford, Texas has had frequent lake-side flooding and has experienced unstable spillway operation. Residents complained that the water had risen more than it should during past flood events. Vibrations and noise generated at the inlet have been annoying and have caused some maintenance problems. HDR was hired by the Weatherford Municipal Utility Board to perform a comprehensive study of the service spillway after a December 1991 flood event caused the spillway inlet to fail due to flotation. The objective of the study was to determine the cause of the problems and develop alternatives for reducing the lake-side flooding and the instability at the inlet. The problems were traced to unstable pressure conditions in the tunnel. It was recommended that the existing semi-circular inlet be replaced with a four-cycle radial labyrinth and that modifications be made to the tunnel and outlet structure to increase the tunnel's flow capacity.

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