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<br />SECflON I <br /> <br /> <br />EXECUTIVE SUMMARY <br /> <br />Section l, the executive summary, provides an ove1View of the <br />"Rocky Flats Plant Drainage and Flood Control Master Plan. " <br />Each section is summarized below. <br /> <br />OVERVIEW <br /> <br />The "Rocky Flats Plant Drainage and Flood Control Master Plan" (referred to herein as the <br />"Master Plan") is a comprehensive analysis of the flood hydrology from the western edge of <br />the Rocky Flats Plant site to Indiana Street, which includes the drainage basins of Great <br />Western Reservoir and Standley Lake. To ensure compatibility with downstream drainage <br />plans approved by the Urban Drainage and Flood Control District (UDFCD), the Master <br />Plan utilizes the methodology and fully integrates the past planning work of UDFCD. In <br />addition, the Master Plan also uses prior hydrologic studies for the plant site and the Great <br />Western Reservoir and Standley Lake drainage basins. The Master Plan is designed as a <br />hydrologic reference for future work at Rocky Flats, and includes review letters issued by <br />UDFCD and the Colorado Water Conservation Board which indicate acceptance of the <br />rainfall, hydrology and runoff parameters contained in the Master Plan. <br /> <br />STUDY AREA <br /> <br />The Master Plan study area lies west of Indiana Street. Drainages considered include Coal <br />Creek, Rock Creek, Walnut. Creek, Woman Creek, and Upper Big Dry Creek. Two <br />municipal reservoirs, Great Western Reservoir and Standley Lake, are located downstream <br />(east) of Rocky Flats. The Master Plan addresses the topography, hydrology, soils, and <br />geology of the drainage basins within the study area. <br />