FLOOD00684

• County: Jefferson
• Community: Golden
• Stream Name: Ralston Creek
• Title: Floodplain Information for Ralston Creek at Schwarzwalder Mine
• Date: 6/1/1981
• Prepared For: Jefferson County
• Prepared By: CWCB
• Floodplain - Doc Type: Floodplain Report/Masterplan

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TABLE OF CONTENTS

Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

Purpose. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Study Reach............................................... 1

Drainage Bas in. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Mapping. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Hydrology. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Hydraulics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Flood Damages............................................. 7

Appendix A - Extracts from Ralston Creek Hydrology
Appendix B - Plotting Table
. Appendix C - Flood Profile
Appendix D - Cross-Sections
Appendix E - Hydraulic Analysis

ILLUSTRATIONS

Location Map............................................. 2

Bas in Map................................................ 4

Photographs of the Channel............................8-11

Flooded Area Map....................................... .12

Cover: Schwartzwalder Mine in Ralston Creek Canyon looking
downstream (southeast) from the mine waste pile
overlooking the storage yard.

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