Local Organizing Committee

William Fiedler
Chair

William R. Fiedler, PE is a Civil Engineer with the Bureau of Reclamation's Geotechnical Services Division in Denver, Colorado. He has over 40 years' experience in dam engineering, and has been involved in the design, analysis and evaluation of spillways, outlet works structures and concrete dams. In the later part of his career, Bill has been involved in developing and improving risk methodologies at Reclamation. He has organized and helped present dam safety related workshops for Reclamation, USSD, ICOLD and the Laos Government. He was one of the lead authors of the May 2014 FEMA publication - Technical Manual: Overtopping Protection for Dams.


Chris Thornton
Chair

Chris Thornton, PhD, PE, M. ASCE is the Director of the Engineering Center and Hydraulics Laboratory at Colorado State University. He received his PhD in Hydraulics at Colorado State University and is a registered Professional Engineer in the state of Colorado. He has over 25 years of experience in conducting hydraulic model studies and has specialized in high energy, supercritical flow conditions and performing prototype performance tests on erosion control techniques. Additionally, Dr. Thornton has been instrumental in developing test facilities and protocols to evaluate levee armoring under prototype conditions. His teams at the Hydraulics Laboratory has recently developed a wave overtopping simulator and are currently investigating the stability of dam and levee protective layers from the combined effects of wave and steady state overtopping. Dr. Thornton teaches the Senior Design series for the graduating Civil and Environmental Engineering students and has authored and co-authored numerous papers and reports in the area of open channel hydraulics.


Thomas Hepler
Chair

Tom Hepler, B.S.C.E., P.E., retired from the Bureau of Reclamation in 2014 with 36 years' experience in hydraulic and structural engineering designs for concrete dams and appurtenant structures. He served as Technical Specialist for the Waterways and Concrete Dams Group in Denver, and as Team Leader for numerous concrete and embankment dam modifications for dam safety. Long-time member of ASCE, ASDSO, and USSD. Co-authored Alternatives for Overtopping Protection of Dams (ASCE,1994), Roller-Compacted Concrete Manual (Reclamation, 2005), and Technical Manual: Overtopping Protection for Dams (FEMA, 2014). Tom currently works for Schnabel Engineering in Greensboro, North Carolina.


Miguel À. Toledo
Member

Prof. Toledo has been teaching Dam Engineering at the Technical University of Madrid for more than 20 years, since 1991; has been involved in plenty of designs and studies of dams; and is the coordinator of the Dam Safety Research group (SERPA). So, he is a rare mix of teacher, practitioner and researcher. He has devoted, and still does, much of his research activity to rockfill dam failure due to overtopping and how to avoid it.


Rafael Moràn
Member

Rafael Moràn, PhD is an Assistant Professor of Hydraulic Engineering in the Technical University of Madrid (TUM). His main teaching activities are courses of Dam Engineering and Hydraulic Infrastructures. Previously, he worked for different consultancies for 10 years performing technical studies, construction projects, and technical project management in hydraulic engineering, many of them related to dam construction. His doctoral thesis deals with protections of rockfill dams against extreme through-flows using rockfill downstream toes. His current research lines are focused on dam safety, dam protections and analysis of monitoring data. He has been involved in several National Research Projects in Spain, all of them related to dam safety and unconventional spillways. From 2007 to 2009, he has been the former Director of the branch office of the International Center for Numerical Methods in Engineering (CIMNE) in Madrid and, currently, he is the Director of CIMNE-UPM Classroom, dedicated to the application of advanced numerical models in hydraulic engineering.


Tony Wahl
Member

Tony L. Wahl, M.S., P.E., has worked 25 years as a hydraulic engineer with the Bureau of Reclamation Hydraulics Laboratory at Denver, Colorado, specializing in flow measurement, fish and debris screening, dam breach modeling, and soil erodibility measurements. Recently, Mr. Wahl has completed lab-scale physical model studies and performed numerical modeling to investigate breach processes for canal embankments. He has also led studies to evaluate methods for quantifying the erodibility of cohesive soils, a key input to newer dam and spillway erosion and breach models.


Brian Crookston
Member

Brian M. Crookston, PhD, PE, M.ASCE is a hydraulic engineer with Schnabel Engineering. His consulting and research interests are focused on water conveyance systems, including hydraulic structures, open channel flows, energy dissipation, flow acoustics, dam and levee breaches, overtopping protection, scour and erosion, and physical and numerical modeling. Brian serves on the IAHR Hydraulic Structures Technical Committee Leadership Team and is Scientific Chair of the 6th International Symposium on Hydraulic Structures.