​​​​​​​Dam Safety Risk Assessment and Risk Management

  • Expert Risk Assessment Advisor. Alternatives Evaluation and Risk Analyses for the Rose Creek Tailings Area, Faro Mine. Prepared for Yukon Government with CH2M-Hill, Whitehorse, Yukon, Canada. (2012).
  • Advisor for the baseline and alterative risk management plans risk assessment of Pine Creek Dam for the Oklahoma District, U.S. Army Corps of Engineers.
  • Co-Project Manager, Portfolio risk assessment for 116 dams for Welsh Water, Wales with Atkins.
  • Project Manager for pilot risk assessments for two large K-water dams with new emergency spillways in Korea and various training activities for K-water staff.
  • Project Manager and Expert Consultant for the development of a Portfolio Risk Management (PRM) process for the 49 projects of the Tennessee Valley Authority’s River Operations Strategic Business Unit, including development of an Initial Screening methodology initiate PRM implementation, implementation of two trial screening risk assessments (SRAs), and development of software to support the SRAs, consequences estimation, reporting portfolio risk assessment results, and prioritization of investigations and risk reduction measures.
  • Member of a working group to develop a risk assessment methodology for a risk-informed Dam Safety Program for the National Water Commission (CONAGUA or Comisión Nacional del Agua), Mexico City, México.
    Member of working group to develop a UK approach to Risk Assessment for Reservoir Safety Management for the Department of the Environment, UK.

  • Member of working group to scope a new risk-informed approach to reservoir safety regulation and basis for the development of procedures to impose differential requirements for reservoir safety to implement the UK Flood and Water Management Act 2010 which replaces the prescriptive 1975 Reservoirs Act for the Department for Environment Food and Rural Affairs (Defra), UK.
  • Expert Advisor for the portfolio risk assessment of 20 dams for the Duero River Basin Authority, Spain.
  • Member of the working group to scope improvements to the Quantitative Risk Assessment Methodology for the UK. Department of the Environment, London, England.
  • Project Manager and Risk Assessment Facilitator for the risk assessment of two dams that potentially affect the safety of a nuclear power plant for submission to the U.S. Nuclear Regulatory Commission for a confidential client.
  • Advisor and Coordinator for the baseline and alterative risk management plans risk assessment of Reaches 2 and 3 of the Herbert Hoover Dike for the Jacksonville District, U.S. Army Corps of Engineers.
  • Project Manager for the Risk-based Evaluations of Potential Operating Restrictions for Lake Cumberland (Wolf Creek Dam) Uncertainty Analysis for the Nashville District, US Army Corps of Engineers, Nashville, Tennessee.
  • Risk Assessment Facilitator for the first FERC risk assessment for the NIPSCO Norway and Oakdale hydroelectric dams for the investigation of alternatives for resolving spillway adequacy issues with MWH, Chicago, Illinois.
  • Project Manager for Development of Reservoir Safety Portfolio Risk Assessment Management Information System and review of UK Defra QRA, United Utilities, Warrington, England.
  • Expert Advisor for the Inquiry into Bulk Water Charges to the South West Irrigation Cooperative (Harvey Water) resulting from the Western Australia Water Corporation’s planned dam safety expenditures including evaluation of a cross-government approach to expenditure on life safety, cost allocation and impact analysis, for the Economic Regulation Authority, Perth, Western Australia with to Marsden Jacob Associates.
  • Consultant for the Project on Integrated Water Management Reinforcement in Mexico for Development of a Regulatory Impact Analysis Methodology to Evaluate the Benefit/Cost Ratio of a Dam Safety Regulation, World Meteorological Organization for the National Water Agency (CAN), Mexico.
  • Development of a generalized event tree analysis tool, DAMRAE (DAM safety Risk Analysis Engine) for the U.S. Army Corps of Engineers.
  • Development of a simulation procedure for life-loss estimation (LIFESim) for use in dam safety risk assessment for the U.S. Army Corps of Engineers and ANCOLD.
  • Development of portfolio risk management decision support software for a large dam owner.
  • Consultant to the U.S. Army Corps of Engineers for their first dam safety risk assessments on individual dams and a portfolio of dams, for development and application of a portfolio risk assessment process, for development of procedures for evaluation of residual risk associated with flood risk reduction projects, and for extreme flood characterization.
  • Project Manager, Risk-based Evaluation of Operating Restrictions for Success Lake. Sacramento District, U.S. Army Corps of Engineers.
    Project Manager, Portfolio risk assessment for 178 dams for United Utilities, England.

  • Advisor on dam safety risk management and potential failure modes analysis for Ontario Power Generation, Toronto, Canada.
  • Project Manager, Update of Portfolio Risk Assessment and Advisor on Dam Safety Remediation Program for Western Australia Water Corporation.
  • Project Manager, Risk assessment of Alamo Dam, U.S. Army Corps of Engineers, Los Angeles District.
  • Project Manager, Risk assessment of Hills Creek Dam, U.S. Army Corps of Engineers, Portland District.
  • Project Manager, Portfolio risk assessment for 25 dams, Fort Worth District, U.S. Army Corps of Engineers.
  • Project Manager, Portfolio risk assessment for 18 dams in the Huntington District, U.S. Army Corps of Engineers and screening-level engineering assessment of 35 dams.
  • Project Manager, Portfolio risk assessment for 15 dams, Baltimore District, U.S. Army Corps of Engineers.
  • Risk Assessment Advisor, Portfolio Evaluation of 20 dams for Coliban Water, Victoria.
  • Project Manager, Portfolio Evaluation of 17 South Australian Water Corporation Large Dams.
  • Project Manager, Risk assessment of Hume and Dartmouth Dams, Department of Land and Water Conservation, New South Wales, and Goulburn-Murray Water Authority, Victoria.
  • Advisor, Development of Risk Assessment and Public Protection Guidelines, U.S. Bureau of Reclamation.
  • Facilitator, Mormon Island Auxiliary Dike Risk Assessment, Folsom Project for evaluation of potential operating restrictions, US Bureau of Reclamation, Denver, Colorado.
  • Risk Assessment Consultant, Portfolio Evaluation of 15 Snowy Mountain Hydro-Electric Authority’s Referable Dams.
  • Preliminary risk analysis of 40 dams for the State Engineer, State of Utah.
  • Consultant to the State of Victoria, Australia, for their state-wide implementation of new risk-based dam safety management guidelines for the newly established water authorities.
  • Advisor on dam safety program issues for South Australian Water Corporation.
  • Organizer and facilitator of an international extreme flood estimation workshop, U.S. Bureau of Reclamation.
  • Review of risk-based criteria for consideration by the Utah State Engineer (State Dam Safety Regulator).
  • Invited Contributor - Event Tree Section - "Risk Assessment Commentary" and Co-author - Chapters on the "Roles of Probability and Judgement", Canadian Electricity Association (CEA), Risk Assessment Guidelines.
  • Risk Assessment Project Manager and facilitator, Statewide Review of Dam Safety for over 270 large dams, Office of Water Reform, State of Victoria to provide: the safety status of referable dams, the general status and operational service performance of all headworks assets, the analysis of the overall status of risks, costs, and adequacy of maintenance of headworks against appropriate best practices/guidelines, the development of an approach to provide consistency and acceptable risk management of headworks including establishing principles and guidelines, and the assessment of future costs and works programs at various risk levels against current business investment plans and assessing implications for: pricing, longer term asset and operational integrity, due diligence, and business viability.
  • Project Manager, Incremental consequence assessment and risk assessment at Ming Teh Dam, Taiwan Provincial Water Conservancy Bureau.
  • Risk Assessment Advisor, Risk Assessment of Horseshoe and Bartlett Dams for Salt River Project, Arizona, USA.
  • Risk Assessment Manager, Risk Assessment of Tongue River Dam, State of Montana, USA.
  • Project Manager, Risk Assessment of Bear River and Hams Fork Dams and presentation to FERC in Washington DC, Utah Power and Light Company, USA.
  • Development of probabilistic slope stability analysis techniques for the U.S. Bureau of Mines and the U.S. Army Corps of Engineers and application to the evaluation of two tailings dams in Arizona.
  • Cooperative study with the U.S. Bureau of Reclamation during the pioneering development stages of the Bureau's "Guidelines to Decision Analysis" (USBR, ACER Memorandum No. 7, 1986).

Internationally recognized as pioneers and leaders in Dam Safety Risk Assessment and Risk Management.


Engineers and Economists, LLC

David S. Bowles, Ph.D., P.E., P.H., D.WRE, F.ASCE, F.AWRA

Managing Principal

Phone: +1.435.770.8709

Email: David_S_Bowles@hotmail.com

Professor Emeritus of Civil and Environmental Engineering
Utah State University |Logan | Utah | U.S.A.