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I I I I I I I I I I I I I I I I I I I w, oJ _. ... '0. ". 000987 SYNOPSIS This report presents the results of a feasibility analysis to identify improvement opt ions for the reach of Cherry Creek from Arapahoe Road to the Dougl as County 1 i ne. The work was performed under contract with the Cherry Creek Basin Technical Advisory Committee/Bill L. Walters Companies by the joint venture of BRW, Inc. and WRC Engineering, Inc. The scope of the analysis is summarized as follows: 1. Collect and analyze existing hydrologic and hydraul ic data for the purpose of defining constraints and identifying problems of develop- ing property adjacent to Cherry Creek. 2. Perform a qualitative analysis of the river morphology and sedimen- tation characteristics of Cherry Creek to define additional con- straints for improvements to Cherry Creek. 3. Develop and evaluate alternative solutions that maximize land use, minimize cost of improvements, satisfy concerns of regulatory agencies, and minimize the chances for upstream and downstream problems. 4. Prepare preliminary design and cost estimates of the selected alternative and document the results in a report. The project area consists of 3.3 stream miles of Cherry Creek upstream of Arapahoe Road and is bounded by Parker Road, Jordan Road, the Douglas County line and Arapahoe Road. Cherry Creek drains approximately 336 square miles at the downstream limit of the project area. The present land use in the area is mainly small farms. The proposed land use is mostly a residential mixture with larger tracts for retail, commercial and business. A review of the river morphology and sedimentation characteristics of Cherry Creek was performed using historic streamflow and runoff data, aerial photographs before and after various floods, samples from the creek bed, and v