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

RAC

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.

​​Flood Hydrology, Reservoir Operation and Spillway Gate Reliability

  • Task Leader for "Analysis of the regulatory framework on flood hazard around the world" and Team Member for “comparison of flood hazard estimation methods for dam safety” under the CEATI Dam Safety Interest Group project for the "Comparison of Flood Hazard Estimation Methods for Dam Safety." (2011-2012).
  • Advisor for development of a Mid-Term River Operations Model of the Lower Colorado River With Uncertainty Analysis for River Operations, Lower Colorado Region, US Bureau of Reclamation, Boulder City, Nevada.
  • Yuba-Feather Forecast-Coordinated Reservoir Operations Feasibility Study: Development of an approach for coordinating the operation of Lake Oroville and New Bullards Bar Reservoirs, California using real-time and planning modes of a Reservoir Release Forecast Model. Yuba County Water Agency and California Department of Water Resources.
  • Emergency Action Inundation Mapping and dam break analyses for Success dam, Sacramento District of the U.S. Army Corps of Engineers.
  • Emergency Action Inundation Mapping and dam break analyses for 25 dams in Fort Worth District of the U.S. Army Corps of Engineers. (2003-2004).
  • PMF determination and dam break modeling for the Hills Creek Dam of Portland District of the US Army Corps of Engineers using HEC-1 and DAMBRK models.
  • Assessment of the reliability of 13 spillway gate systems for the U.S. Army Corps of Engineers Portland, Huntington and Fort Worth Districts with Professor Jack Lewin and Dr. Geoff Ballard and integration in dam safety risk assessments. (2001).
  • Folsom Real-time Reservoir Operations Software: Development and application of real-time and planning modes of Folsom Dam Reservoir Release Forecast Model for U.S. Bureau of Reclamation in collaboration with National Weather Service CA/NV River Forecast Center, Sacramento Area Flood Control Agency (SAFCA), State of California Division of Water Resources, and U.S. Army Corps of Engineers. (1995 – 2003).
  • Hydraulic and hydrologic analyses of urban flooding in Los Angeles, California. Expert testimony and hydraulic and hydrologic analyses of urban drainage facilities and urban flooding using HEC-2, HEC-RAS, and proprietary models. Keller, Price & Moorhead, Redondo Beach, California; Tomaryn and O'Reilly, Torrence, California; and Breidenbach, Buckley, Huchting, Halm & Hamblet, Los Angeles, California. (1995-2002).
  • Estimation of Spillway Evaluation Floods for Two Logan River Dams, Utah. PMF determinations and dam break flood inundation studies for Emergency Action Plans for Logan River First and Third Dams for CH2M Hill, Salt Lake City, Utah and Utah State University Physical Plant, Logan, Utah. (1991).
  • Engineering hydrology and hydraulics including dam break analyses. Dam-break analyses for 15 dams in Baltimore District of the U.S. Army Corps of Engineers.
  • Estimation of Spillway Evaluation Floods for seven Sevier River Basin dams based on the “most likely” outcome of hydrometeorologic variables that would be expected to occur in combination with the PMP Franson-Noble & Associates, Inc., American Fork, Utah (1997).
  • Reevaluation of Spillway Evaluation Floods for the Snowy Mountains Hydro-Electric Authority dams, NSW, Australia. Specialized Snowmelt Consultant for the Reevaluation of Spillway Evaluation Floods for all 15 dams of the Snowy Mountains Hydro-Electric Scheme for Sinclair, Knight, and Merz (formerly HydroTechnology), Armadale, Victoria, Australia. (1995-1996).
  • PMF and spillway evaluation flood determinations and incremental damage assessments for seven Sevier River Basin dams including site-specific PMP. Otter Creek, Piute, Rocky Ford, Gunnison, Sevier Bridge, DMAD, and Gunnison Bend dams of Sevier River Basin in Utah. Utah State Engineer's Office, Salt Lake City, Utah. (1994-1995).
  • Estimation of PMFs for six dams for Lower Colorado River Authority, Texas. Determination of Probable Maximum Floods on a 30,000 square mile area of the Lower Colorado River Authority and dam break studies. (1989-1991).