FLOOD10402

• County: Douglas
• Basin: South Platte
• Title: Douglas County, Colorado Flood Warning Assessment - Project No. CI03-037
• Date: 9/1/2004
• Prepared For: Douglas County Public Works, CWCB, Parker Stormwater Utilities, Castle Rock Stor
• Prepared By: HDR
• Floodplain - Doc Type: Flood Mitigation/Flood Warning/Watershed Restoration

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TABLE OF CONTENTS

Executive Summary

Pages i to iii

1.0 Introduction... ............. ............ ...... .... ... ....... ....... ........ ................................... ...... .................. Page 01

2.0 Interviews/Information Gathering............................................................... ................... Pages 01-09

3.0 Weather Prediction and Warning Resources ..... ......... ............................ ...... ....... ......... Pages 09-20

4.0 Weather Detection Resources...................................................................................... Pages 20-30

5.0 Communication Resources........................................................................................... Pages 30-33

6.0 Incident Command Structure and Emergency Operation Center Operations ................ Pages 33-39

7.0 Evacuation Procedures and Policies....... ................ ............ ........ ...... .......... ......................... Page 40

8.0 Flood Orientation.......................................................... ....................... ......................... Pages 40-43

9.0 Potential Flood Hazard Areas....................................................................................... Pages 43-48

10.0 Douglas County Weather Website .............. ......... .................... ................ ............. ...... Pages 48-52

11.0 Summary.................................................................................................................... Pages 52-53

12.0 Summary of Recommendations ..... ........ ........ .............. .......... ........ ....... ............... ....... Pages 53-56

List of Acronyms.................................................................................................................. Pages 57-60

References.................................................................................................... ............................. Page 61

LIST OF FIGURES

Figure 1: Plum Creek near Sedalia Observed/Predicted Hydrograph ............................. Page 13
Figure 2: Map Depicting the Urban Drainage and Flood Control District......................... Page 17
Figure 3: USGS Stream Gage Water Volume on Cherry Creek Near Parker, Colorado. Page 22
Figure 4: USGS Stream Gage Water Height on Cherry Creek Near Parker, Colorado... Page 23
Figure 5: Map Depicting the Urban Drainage and Flood Control District Stream Gages
in Douglas County. ....................................................................................... Page 24
Figure 6: Urban Drainage and Flood Control District Flood Warning Template .............. Page 25
Figure 7: Map Depicting Urban Drainage and Flood Control District Stream gages in

Douglas County....... ......... ....... ............... ............. ....... ...... ....... ......... ............. Page 26

IV