FLOOD03385

• Designation Number: 312
• County: Arapahoe
• Community: Littleton
• Stream Name: Lower Dad Clark Gulch, and DFA 0068
• Basin: South Platte
• Title: Flood Hazard Area Delineation - Lower Dad Clark Gulch, and DFA 0068
• Date: 11/1/1990
• Designation Date: 3/1/1991
• Floodplain - Doc Type: Floodplain Report/Masterplan

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FLOOD HAZARD AREA
DELINEATION
DAD CLARK GULCH & DFA 0068

Figure 2-1
Figure A-2a
Figure A-2b
Figure A-3
Figure A-4
Figure A-5

TABLE OF CONTENTS

SECTION

PAGE

1.0 PREFACE

LIST OF FIGURES

Vicinity Map
CUHP and SWMM Network - Rangeview
CUHP and SWMM Network - Jackass and Lower Dad Clark
Flood Discharge Profile - Rangeview Gulch
FIDod Discharge Profile - Jackass Gulch
FIDod Discharge Profile - Lower Dad Clark Gulch

1.1 Authorization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 LIST OF TABLES
1.2 Purpose and Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Table 3-1 1-Hour Rainfall Depths
1.3 Acknowledgements ............................ . 1 Table A-1 Basin Parameters
2.0 STUDY AREA DESCRIPTION Table B-1 Floodplain and Floodway Reference Data
2.1 Location .................................... . 2
2.2 Drainage Basin Characteristics . . . . . . . . . . . . . . . . . . . . . 2 SHEET INDEX
2.3 Sub-basin Delineation .......................... . 3 Sheet No. Title
3.0 HYDROLOGY 1 Title Sheet
2-3 Location Sheets
3.1 Basin Parameters ............................. . 4 4 Plan Rangeview Gulch Stations 10+00 to 27+00
3.2 Design Rainfall ............................... . 4
3.3 Hydrographs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 5 Plan Rangeview Gulch Stations 27+00 tD 33+00
3.4 Flood Routing 4 6 Profile Rangeview Gulch Stations 10+00 to 33+00
................................ .
3.5 Upper Dad Clark Gulch Basin .................... . 4 7 Plan and Profile Rangeview Gulch Stations 33+00 to 61 +00
4.0 FLOODPLAIN EVALUATION 8 Plan and Profile Rangeview Gulch Stations 61 +00 to 88+00
9 Plan Jackass Gulch Stations 0+00 to 20+00
4.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 10 Profile Jackass Gulch Stations
0+00 to 20+00
4.2 Design Criteria ............................... . 5
4.3 Analysis 5 11 Plan and Profile Jackass Gulch Stations 20+00 to 48+00
.................................... .
4.4 Flood Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 12 Plan and Profile Jackass Gulch Stations 48+00 to 75+00
4.5 Floodplain and Floodway Data .................... . 6 13 Plan and Profile Jackass Gulch Stations 75+00 to 96+00
14 Plan Lower Dad Clark Gulch Shallow Flooding
APPENDIX A: Hydrologic Data Summary 15 Plan and Profile Lower Dad Clark Gulch Stations 0+00 to 28+00
APPENDIX B: Floodplain and Floodway Reference Data 16 Plan and Profile Lower Dad Clark Gulch Stations 28+00 to 56+00

FLOOD HAZARD AREA DELINEATION MAPS