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o Developed various decision-support models of segments of the Platte River System in Colo, rado, Wyoming and Nebraska, o Textbook, Introduction to Hydrology, 4th Ed" has one of most comprehensive treatments of water budget analyses, natural flow, and re- gional river system models. Surface Water System Design o Participated in formulating a mathematical op- timization and stream simulation model and conducting preliminary screening on a full range of structural and nonstructural options for deal- ing with continuing flood problems in the Weeping Water Watershed of southeastern Ne- braska; utilized regional objectives to search for a feasible project in an area where national eco- nomic development criteria were previously un- able to provide relief, , Managed the preliminary assessment of five alternative dam sites as part of a feasibility study of a proposed irrigation re-regulation project in eastern Wyoming on Horse Creek, a tributary to the North Platte River, o Managed the development of a river basin screening model, utilizing integer and separable nonlinear mathematical programming tech- niques, to study integrated surface and ground- water development and management options available to the Upper Big Blue Natural Re- source District of Nebraska, Sedimentation, Geomorphology and River Res- toration Currently designing numerous UPRR bridge waterways and preparing floodplain revision documents on alluvial fans. o Currently serving as technical director for geo- morphologic aspects of Corps of Engineers eco- system restoration project for flood control planning for the City of East St. Louis. , Conducted regime and channel morphology studles in the Platte River of central Nebraska; developed hydraulic characteristic equations and @'~ PARSONS Gary L, Lewis, Ph.D., P.E. Sl~nior Watl~r Resources Engineer Page 8 used dominant discharge to assess the effect that changes in flows have had on channel width and depth throughout a critical habitat reach for threatened and endangered species, o Authored Ch. 9, "Sediment Management," in the recent ASCE Manual of Practice on Design of River and Reservoir Intakes for Hydroelectric Plants, o Currently writing the "Shallow Reservoir Sedi, mentation" chapter for the upcoming interna- tional manual on Reservoir Sedimentation, o Performed channel stability analysis for anum, ber of streams throughout the western U,S, o Conducted history of channel.,forming flow technology for Denver Water Department and presented results to Colorado Division I Water Court regarding purported instream flow channel maintenance requirements of the 1893 Organic Administration Act. . Following the severe Missoun and Mississippi River overflows in 1993, participated in several studies of causes of channel migration, levee overtoppings and bridge washouts, Assessed solutions to future flooding and scour problems, and designed several counternleasure and river restoration systems, PROFESSIONAL AFFILIATIONS American Railway Bridge and Building Association American Railway Engineering and Maintenance. of-Way Association American Society of Forensic Engineers America Society of Civil Engineers American Water Resources ASSOCIation National Association of Forensic Engineers Universities Council on water Resources American Society of Testing and Materials National AssociatIOn of Water Institute Directors Colorado Association of Floodplain Managers 0221ewigl17.doc,'O..lOOi<l