FLOOD00209

• Designation Number: 543
• County: El Paso
• Community: Unincorporated El Paso County
• Title: Flood Insurance Study - Pitkin County, CO, and Incorporated Areas
• Date: 9/1/1988
• Designation Date: 3/1/2001
• Contract/PO #: &&
• Floodplain - Doc Type: Floodplain Report/Masterplan

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TABLE OF CONTENTS

PREFACE .......................................................................................................................................ii

TABLE OF CONTENTS ..............................................................................,..,..........,..................iii

INTRODUCTION ....................................................................................,.,..,............................,.... I

Purpose and Scope...................,.,............,............................................................................ 1

Authorization..................................................................,............,....................................,.. 1

STUDY AREA DESCRIPTION .....................................................................................................2

Community Description ,..............,....,............,..................................................................,. 2

Watershed Descriptions............................................................................................,.......... 2
Flooding Problems and Flooding History ..............................................................,............ 2

Previous Studies..........................................................................,....................................... 3
Community Response to the CWCB Designation and Approval Process .......................... 3

ENGINEERING METHODS ..........................................................................................................4

Hydrologic Analysis ..........................................................................................,.................4

Hydraulic Analysis .,.......,........................................................,..............................,............ 8

Floodplain Mapping ....................................,.........,.......................................,...,.............., 13

FLOODPLAIN MANAGEMENT ,..........,.,..............,..........,.....,............,.,....,..,........................... 14
Local Ordinance Requirements .........................................................................................14

Flood Insurance................................................................................................................. 14
Floodplain Management Alternatives .........,..............................................,......................14

APPENDIX
Location Map
FlS Discharge Rates for Streams Studied by Detailed Methods
Analysis of Approximate Streams by CWCB Regional Regression Equations
HEC-FFA (Bulletin #17B) Analysis of USGS Stream Gaging Station Data

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