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. ASSISted the State of Nebraska with independent evaluations of the hydrologic impacts of the proposed Wyoming Deer Creek Reservoir. . Developed inventory and summary of available surface water allocation models for the Platte River in Nebraska, . Managed the development of a river basin screening model, utilizing integer and separable nonlinear mathematical programming tech, niques, to study integrated surface and grounej, water development and management options available to the Upper Big Blue Natural Re- source District of Nebraska. . Developed tools for analyzing the relationship between surface and groundwater in the Centr~ll Platte River Valley throughout its length through Nebraska, , Assessed historical declines in water supplies from the Enders Reservoir in Nebraska, and linked declines to stream depletions from U1l- stream center-pivot well development. , Evaluated impacts on hydrology and channel morphology of several proposed projects an,d operational instream flow scenarios in the Nort:h Platte, South Platte, and Platte Rivers, . Conducted regime and channel morphology studies in the Platte River of central Nebraska; developed hydraulic characteristic equations and used dominant discharge to assess the effect that changes in flows have had on channel width and depth throughout a critical habitat reach, , Evaluated instream flow requirements for mail1' tainmg the channel of the Platte River f')r whooping crane habitat as part of an environ- mental assessment of impacts of the Two Forks water supply project in Denver, . 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. ~ l!:::J PARSONS Gary L. Lewis, Ph.D., P.E. Slmior Wat~~r Resources Engineer Page 5 , Studied effects of hydrologic changes and chan- nel forming flows in the Platte River on Whooping Crane and other T &E species habitat along the river, . Applied the stream depletion factor (sdf) tech- nique in reverse to evaluate the timing of ground-water return flows which could be ex- pected from a proposed large,scale irrigation project in central Nebraska, . Assisted the Nebraska Game and Parks Com- mission with technical aspects of their water rights applications for direct flow and storage use rights for the proposed Calamus hatchery m central Nebraska, Properties, Distribution and Circulation of Snr- fae", Water . Coauthor of a leading Hydrology textbook, in- troduction to Hydrology, used in dozens of V,S, and international universities, Textbook con- tains one of the most comprehensive treatments of regional river system models, hydrologic modeling, hydrologic budgets, and continuous streamflow simulation. . Served as one of two consulting engmeers en- gaged by FHW A to review and edit the recently- published Hydrology Manual for State DOT En- gmeers. Participation in Multidisciplinary Agency/Consultant Review Teams . Reviewed over 2000 hydraulic and hydologic studies of bridged waterways, levee construction projects, diversion structures, land development proposals, and floodplain fill proposals, . Reviewed numerous river and reservoir opera- tions model reports for a variety of clients, in- cluding North Platte River in Wyoming, Platte River in Nebraska, Republican River m Kansas, Arkansas River in Colorado, Snake River m Idaho, and San Juan River in New Mexico, . Currently serving as Senior Hydrologist to nine cooperative governmental agencIes in the State of Nebraska in developing their decision support 022leWlgI17_d()C/0400~