FLOOD10390 ‎(2)‎

• County: Moffat
• Community: Craig to Dinosaur National Monument
• Stream Name: Yampa River
• Title: Floodplain Information Report - Yampa River from Craig to Dinosaur National Monument
• Date: 4/1/1996
• Prepared By: CWCB
• Floodplain - Doc Type: Floodplain Report/Masterplan

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TABLE OF CONTENTS

Preface
1.0 INTRODUCTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 1

1.1 Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 1

1.2 Acknowledgements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 1
1.3 Related Flood Studies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 1

2.0 STUDY AREA .............................................. 3

2.1 Location. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3

2.2 Study Reach ........................................... 3

2.3 Basin Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 5
2.4 Summary of Drainage Areas ................................ 5
2.5 Flood Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 7

3.0 HYDROLOGIC ANALYSIS .................................... 10
3.1 Existing Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 10
3.2 New Hydrologic Information ............................... 10
3.3 Equation Selection Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 11
3.4 Hydrologic Findings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . " 11

4.0 HYDRAULIC ANALYSIS ..................................... 14
4.1 Base Mapping ......................................... 14
4.2 Stream Reaches ........................................ 14
4.3 Field Surveys and Cross-Section Preparation .................... 17
4.4 Computing Flood Depths . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 18
4.5 Delineating Flood Boundaries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 19

5.0 INTERPRETATION OF THIS REPORT. . . . . . . . . . . . . . . . . . . . . . . . . . .. 22
5.1 Hydrologic Findings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 22
5.2 Hydraulic Findings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . .. 22
5.3 Floodplain Delineations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 22

6.0 REFERENCES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 23

LIST OF TABLES

TABLE
1 Stream Gage Data
2 Drainage Area Summary
3 Flow Summary
4 Reach Classifications
5 Cross-Section Summary
6 Depth of Flooding Summary

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