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Risk Assessment: A Tool for Dam Rehabilitation Decisions

by David S. Bowles, Utah State Univ, Logan, United States,



Document Type: Proceeding Paper

Part of: Geotechnical Practice in Dam Rehabilitation

Abstract:

A phased approach to the dam rehabilitation decision problem is presented. The approach is based on viewing the newer dam safety evaluation approaches of incremental damage assessment (IDA) and risk assessment (RA) as the third and fourth phases, respectively, in a sequential process which begins with the conventional hydraulic adequacy assessment, based on hazard and size classification (Phase 1), followed by structural adequacy assessment (Phase 2). The discussion draws on examples of all four phases of evaluation for various dam owners and operators in the United States. The paper includes a discussion of risk assessment procedures.

Subject Headings: Risk management | Rehabilitation | Dams | Structural analysis | Dam failures | Structural safety | Hydraulic design | United States

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