FLOOD04017

• County: Jefferson
• County: Denver
• Community: Columbine Valley, Denver
• Stream Name: Dutch Creek, Lilley Gulch, Coon Creek,
• Basin: South Platte
• Title: Flood Hazard Area Delineation
• Date: 5/1/1978
• Prepared For: Jefferson County / Arapahoe County
• Prepared By: UDFCD
• Contract/PO #: &&
• Floodplain - Doc Type: Floodplain Report/Masterplan

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TABLE OF CONTENTS

PREFACE
Authorization
Purpose & Scope
Data Acknowledgments

DRAINAGE BASIN DESCRIPTION
Locat i on
Drainage Basin Characteristics
Sub-Basin Delineation

HAZARDS

DRAINAGE BASIN FLOOD HISTORY & FLOOD
Historical Flood Information
Description of Flood Hazards
Factors Which Reduce Flood Hazard

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HYDROLOGIC AND HYDRAULIC DETERMINATIONS
Basin Parameters
Design Rainstorms
Infiltration Rate/Retention
Hydrographs
Flood Routing

FLOOD PLAIN EVALUATION
Criteria
Analysis
Flood Plain and Floodway Data
Flood Velocities

SUMMARY

APPENDICES

Appendix A
Appendix B
Appendix C

Basin Parameters
Hydrologic Data and Calculations
Flood Plain and Floodway Reference

LI ST OF FIGURES

Figure I

Vicinity Map

LI ST OF TABLES

Table I
Table 2

Historical Flood Discharges
Peak Flows

Data

LIST OF DRAWINGS

Page No.

Drawi ng No.
I
II
III
I to 16
17 to 18
19 to 27
28 to 31
32 to 42
43 to 45
46 to 47
48 to 51

Ti tie

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2

Title Sheet
Drawing Index
Basin Boundaries

Dutch Creek - 450+00 to 0+00
North Branch Dutch Creek - 49+00

2
2
2
4

Li II ey Gu I ch - 232+00 to 0+00
North Branch Li II ey Gu I ch - 100+00
Coon Creek - 294+00 to 0+00
North Branch Coon Creek - 84+00

5
5
6
6

Dutch Creek - Columbine Area SW & SE

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7
7
7
7
8

Three Lakes Tributary - 123+00

9
9
10
II
II

12

A-I
B-1 to B-6
C-l to C-13

3

5
9

to 0+00

to 0+00

to 0+00

to S. Platte River