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I I I I I I I I I I I I I . Pertinent Drainage Studies . Land Use Maps . Flood Insurance Study E. ANALYSIS AND DESIGN CRITERIA Arapahoe County . Comprehensive Plan . Hydrology Information on Fillmore Tributary . Assessor's Maps with Drainage Facilities . Orchard Road Bridge Information The Major Drainageway Planning and Flood Hazard Area Delineation was performed per the terms of the contract and the guidelines and criteria set forth in the Urban Storm Drainage Criteria Manual (USDCM) (Reference 1). Also utilized were the Storm Drainage Design and Technical Criteria of the various project sponsors. City of Littleton . Construction Plans for Littleton Boulevard Bridge . Perti nent Drainage Studies . Flood Insurance Study . City and Zoning Maps Subsequent to the initial data gathering and field reconnaissance work to establish watershed boundaries and existing storm drainage features, the study area was divided into separate sub-watersheds within the major watershed. The physical parameters (i.e., area, length, slope, and percent imperviousness) of each sub-watershed were then defined and the design storm hydrographs developed for the various recurrence intervals using the Colorado Urban Hydrograph Procedure (COOP, Reference 3). The design rainfall information was obtained from the UD&FCD and the I hour NOAA rainfall depths (Reference 14). City of Englewood . Trail Plans City of Greenwood Village . Horseman's Park Construction Plans The combining of the hydrographs, channel routing, and routing of the flood hydrographs through the existing ponds were performed using the Storm Water Management Model (SWMM, Reference 2). The resulting hydrology was used to define the water surface profiles for the 10-, 50-, and 100-year recurrence interval storms by utilizing the United States Army Corps of Engineer's water surface profile computer program (HEC- 2, Reference 15). South Suburban Parks and Recreation District . Non-motorized Transportation and Greenway Plan F. PROJECT ADVISORY COMMITTEE Colorado Department of Transportation . Construction Plans for Atchinson. Topeka and Sante Fe Bridge Crossing I I I I I I Centennial Water and Sanitation District . Utility Maps This study is sponsored by UD&FCD, Arapahoe County, Douglas County, the City of Englewood, the City of Greenwood Village, and the City of Littleton. In addition to WRC and it's sub-consultants, the Project Advisory Committee for this project included the following sponsors, agencies, companies, and individuals: Denver Water Board . Water Main Maps along Big Dry Creek alignment South Englewood Sanitation District . Utility Maps South Arapahoe Sanitation District (Meurer & Associates) . Utility Maps 1-3