retired as a river/navigation engineer from the U.S. Army Corps of Engineers Waterways Experiment Station in 2004 and became a partner of Computational Hydraulics and Transport (CHT). He has over 45 years of experience in river engineering and sedimentation, fluvial geomorphology, and navigation and environmental related studies. He has been involved with several studies including developing dike systems to improve navigation, alignment of locks and dams for navigation, improvement of flood-control structures, and providing technical assistance to various Corps offices for the solution of sedimentation problems and hydropower plant retrofits at Corps projects. He edited the ASCE Manual 124, Inland Navigation Channel Training Work, contributed to other ASCE manuals, and authored numerous technical papers and reports. In 2005, Pokrefke received the ASCE Hans Albert Einstein Award for his contributions to the science of fixed- and movable-bed modeling and in the application of his expertise in hydraulic and sediment transport processes. Tom holds a MS in Civil Engineering.