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<br /> Czty (!I' Littleton
<br />Table of Contents
<br />1. Introduction............,....,...,.. ,
<br /> 1.1, Authorization.............. ..
<br /> 1,2, Purpose and Scope ..,..
<br /> 1,3. Mapping and Surveys ..
<br /> 1.4. . Background Information
<br /> 1.5. Analysis and Design Criteria
<br /> 1,6, Acknowledgments......,....,... ,
<br />2. Watershed Description....,....,.....
<br /> 2,1. Location............., ..........,."..,
<br /> 2,2. Massey Draw..,..........,....,....
<br /> 2.3. SJCD (South),..............,......,
<br /> 2.4. Flood History ........"...........,..
<br />3. Hydrologic Analysis....,....,.........
<br /> 3.1. Methodology..,................... ..
<br /> 3.2, Subwatershed Delineation '"
<br /> 3.3, Watershed Imperviousness.
<br /> 3.4. Depression Losses ............,..
<br /> 3.5, Infiltration,....,;....,......,......,.. ..
<br /> 3,6. Rainfall,.... '....,... ....., ....,..,......
<br /> 3,7. UDSWM Routing Element Parameters
<br /> 3.8. Model Calibration......,.. ,..,........,..,..,....,
<br /> 3,9, Resu Its,.............,..............................,...
<br />4. Hydraulic Analysis....................................
<br /> 4.1, Methodology ".......,..."..,.",..",.,...,.....,.
<br />5. Flood Hazard Area Delineation.................
<br /> 5,1. General.........,............................"...... ..
<br /> 5.2. Comparison with the Effective Flood Insurance Study
<br /> 5,3. Floodplain and Floodway Data
<br />6. References
<br />
<br />
<br />
<br />1-1
<br />1-1
<br />1-1
<br />1-1
<br />1-1
<br />1-1
<br />1-1
<br />2-1
<br />2-1
<br />2-1
<br />2-1
<br />2-1
<br />3-1
<br />3-1
<br />3-1
<br />3-1
<br />3-1
<br />3-1
<br />3-1
<br />3-1
<br />3-2
<br />3-2
<br />4-1
<br />4-1
<br />5-1
<br />5-1
<br />5-1
<br />5-1
<br />6-1
<br />
<br />Table A-2
<br />Table A-3
<br />Table A-4
<br />Table A-5
<br />
<br />Table 7
<br />Table A-1
<br />
<br />UDSWM Conveyance Element
<br />Baseline Peak Discharges for
<br />
<br />Massey Draw and SJCD (South)
<br />
<br />SJCD (South) Floodplain and Floodway Data
<br />CUHP Subwatershed Characteristics, Massey Draw
<br />CUHP Subwatershed Characteristics, SJCD (South)
<br />Parameters,
<br />Parameters
<br />
<br />UDSWM Conveyance Element
<br />
<br />SJCD (South)
<br />
<br />Massey Draw
<br />
<br />,A-17
<br />.A-18
<br />.A-21
<br />,A-23
<br />
<br />5-9
<br />.A-15
<br />
<br />Table 5
<br />Table 6
<br />
<br />Comparison of 1978 and 2005 FHAD Water Surface Elevations
<br />Massey Draw Floodplain and Floodway Data
<br />
<br />5-1
<br />5-2
<br />
<br />Table 1
<br />Table 2
<br />Table 3
<br />Table 4
<br />
<br />Comparison of
<br />Baseline Model
<br />
<br />100-Year
<br />
<br />100-Year
<br />
<br />One-Hour
<br />
<br />Flows
<br />
<br />Flows
<br />
<br />Ralnfa
<br />
<br />Depths
<br />Reported In UDFCD Memorandum
<br />from Flood Insurance Study,
<br />OO-YearFlows: Target Flows
<br />
<br />Calibration Model and Modified
<br />
<br />3-1
<br />3-2
<br />3-2
<br />
<br />3-2
<br />
<br />List
<br />
<br />of Tables
<br />
<br />Flood Hazard Area Delineation Drawings Massey Draw and SJCD (South)
<br />
<br />Appendix A - HydrOlogic Analysis Figures and Tables
<br />
<br />Flood Hazard Area Delineation
<br />Massey Draw and SJCD (South)
<br />December 2005
<br />
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