FLOOD10493

• County: Adams
• County: Arapahoe
• Community: Aurora
• Stream Name: Upper Box Elder Creek
• Basin: South Platte
• Title: Upper Box Elder Creek Outfall Systems Planning Study - Alternative Evaluation Report
• Date: 12/1/1994
• Prepared For: Aurora, Arapahoe County, Adams County, UDFCD
• Prepared By: CH2M Hill
• Floodplain - Doc Type: Floodplain Report/Masterplan

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Typical Stabilized Natural Channel
Typical Wetland-Bottom Channel
Typical Grass-Lined Channel .

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DENl0015182.WP5

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Stable Channel Balance ..
Channel Pattern and Stability

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Comparison of Discharge Estimates Between this Study and the
Beebe Draw Study ...........................
Comparison of Discharge Estimates Between this Study and
Other Box Elder Creek Studies

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Study Area

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Vicinity Map

Figures

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Alternative Concept Screening Matrix ......
General Description of Alternative 1 through 6

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Subwatershed Distribution .......
UDFCD Stream Names and Numbers
Summary of Area Adjustments .......
Summary of Unadjusted Rainfall Depths ..
1 00- Year Peak Discharges at Selected Locations
Runoff Volumes at Selected Locations

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Appendix A. Soils
Appendix B. Existing Imperviousness
Appendix C. Future Imperviousness
Appendix D. Subwatersheds
Appendix E. Watershed 6 (Upstream of Study Area)
Appendix F. Streams and Conveyance Elements
Appendix G. Rainfall
Appendix H. Subwatershed Characteristics
Appendix I. Stream Characteristics
Appendix J. UDSWM2 Connectivity Diagrams
Appendix K. Baseline Peak Discharges
Appendix L. Baseline Peak Discharge verses Stream Station
Appendix M. Baseline Hydrographs at Select Locations
Appendix N. Existing Riparian Resources
Appendix O. Future Arterial Roadways
Appendix P. Alternative 1 Through 6 Plans
Appendix Q. Alternative 1 Through 6 Costs by Stream
Appendix R. Recommended Alternative Plans
Appendix S. Recommended Alternative Peak Discharges
Appendix T. Recommended Alternative Costs by Stream
Appendix U. Recommended Alternative Roadcrossing and Detention Costs
Appendix V. Recommended Alternative Channel Costs

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Appendices

Summary

Representative Unit Costs. . . . . . . . . . . . . . . . .
Summary of Alternative Costs (1994), Coyote Run ........
Summary of Alternative Costs (1994), Upper Box Elder Creek
Hydrologic Impacts of Alternatives ..........
Qualitative Ratings of Alternatives Implementation
Issues, City of Aurora ..................
Qualitative Ratings of Alternatives Implementation
Issues, Arapahoe County, Adams County

of Recommended Alternative Costs (1994)

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and Environmental

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and Environmental

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