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Jeffrey A. Schaefer, Ph.D., P.E., P.G. and David M. Schaaf, P.E.

In 2005 the U.S. Army Corps of Engineers (USACE) developed and implemented a Screening Portfolio Risk Assessment (SPRA) process for Dam Safety. The screening process considered loading frequency, an engineering rating to estimate a relative probability of failure, and both human life and economic consequences of failure. The results were utilized as a tool to help prioritize funding for dam safety modification projects and required studies. Three multidisciplinary cadres evaluated what was considered the worst 10% of the USACE’s dam projects in 2005 and the next worst 10% in 2006. The dams evaluated included flood control, navigation, and multi-purpose dams. Approximately seventy facilities were evaluated each year.

As a result of the aging of the USACE’s dam portfolio and the state of the art at the time of design and construction (mostly 1940’s-50’s), significant dam safety deficiencies exist at many USACE dams. This paper summarizes the major deficiencies identified from the SPRA process. Examples, including foundation seepage, karst development, embankment stability, gate deterioration, liquefiable foundations, and inadequate spillway capacity are provided along with discussion on which deficiencies contribute the greatest risk.

Now showing 1–12 of 56 search results:

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    2006  Papers

    2006 – A Summary Of Major Dam Safety Deficiencies Identified By The Initial U.S. Army Corps Of Engineers’ Screening Portfolio Risk Assessment Program

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    2006  Papers

    2006 – Accessing Deep Storage at Warragamba Dam

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    2006  Papers

    2006 – Achieving Benefits From Instrumentation And Survey Measurements Of Dam Behaviour

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    2006  Papers

    2006 – ALARP Considerations for Dam Safety – Are We There Yet?

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    2006  Papers

    2006 – An Overview of the U.S. Army Corps of Engineers’ Screening for Portfolio Risk Assessment for Dam Safety Program

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    2006  Papers

    2006 – Contemporary Issues Concerning the Instrumentation/Survey of Dams from the Legal Perspective

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    2006  Papers

    2006 – Corporate Governance For Dam Safety

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    2006  Papers

    2006 – Corporate Governance for Dam Safety

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    2006  Papers

    2006 – Dam Instrumentation or Damn Instrumentation – A South African Perspective

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    2006  Papers

    2006 – Dam Monitoring at Verbund – Austrian Hydro Power

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    2006  Papers

    2006 – Dam Safety Management in Austria

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    2006  Papers

    2006 – Design and Construction of the Gattonvale Offstream Storage

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    2006  Papers

    2006 – Design and Construction of the Ridges Basin Dam

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    2006  Papers

    2006 – Developing Techniques for New Dam Design and Construction Management – Recent New Zealand Experience

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    2006  Papers

    2006 – Development and Application of a Risk Analysis and Prioritisation Tool (RAPT) for Dam Safety Management

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    2006  Papers

    2006 – Effect of Geology on Dam Construction Projects in Iran

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