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Coolidge Dam Abutment Stability and Stabilization

by Chris Powell, U.S. Bureau of Reclamation, Boise, United States,
Ron Pearson, U.S. Bureau of Reclamation, Boise, United States,



Document Type: Proceeding Paper

Part of: Geotechnical Practice in Dam Rehabilitation

Abstract:

This paper focuses on left abutment stability assessments and stabilization measures at Coolidge Dam, Arizona. Initial assessment of abutment stability was based on limited rock strength data and the use of averaged joint surveys which identified the potential critical geologic discontinuities. In light of these initial results, a decision was made to clean off and map critical areas of both abutments. The challenges in applying today's dam safety standards to the rehabilitation of this unique old structure are clearly outlined in discussions of the geologic investigations, abutment stability assessment and design of the abutment stabilization.

Subject Headings: Bridge abutments | Structural safety | Geology | Concrete dams | Subsurface investigation | Structural stability | Structural design | Arizona | United States

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