FLOOD10332

• County: Eagle
• County: Pitkin
• Community: Basalt
• Stream Name: Roaring Fork River
• Title: Floodplain Information Report
• Date: 7/24/2000
• Prepared For: Basalt, Eagle and Pitkin Counties, CWCB
• Prepared By: Matrix Design Group, Inc.
• Floodplain - Doc Type: Floodplain Report/Masterplan

ort Town oJ Basalt, Eagle & Pitkin Counties, Colorado
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TABLE OF CONTENTS
PREFACE ............................................................................, .................lV
SECTION 1 - INTRODUCTION ........................................................ ,................. 1
1.1 Authorization..........................................................................., .................. 1
1.2 Previous Studies....... ............................................. .................... ,................. 1
1.3 Purpose and Scope .................................................................... ..................2
1.4 Coordination............................................................................. "................ 3
SECTION 2 - STUDY AREA DESCRIPTION .................................. ................. 3
2.1 Drainage Basin Characteristics................................................. ................. 3
2.2 Study Reach Description........................................................... ................. 3
2.3 Climate...................................................................................... ................. 3
2.4 Channel Instability.................................................................... .................4
2.5 Maps and Surveys ........................................... .......................... .................4
SECTION 3 - FLOOD mSTORY....................................................... .................6
3.1 Gage Records............................................................................ ................. 6
3.2 Ruedi Reservoir Operations during the Spring 1995................ .................9
3.3 Summary of Historical Floods............................... ................... ............... 10
SECTION 4 - HYDROLOGIC AND HYDRAULIC ANALYSIS ..... ...............12
4.1 Hydrologic Analysis................................................................. ............... 12
4.2 Hydraulic Analysis.................................................................... ............... 14
SECTION 5 - INTERPRETATION AND USE OF REPORT DATA ............... 15
5.1 Flood Frequency and Discharge .. ............... 15
5.2 Flood Elevations .......................... ............... 15
BIBLIOGRAPHY AND REFERENCES ............... 16
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ort le & Pitkin Counties, Colorado
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LIST OF TABLES AND FIGURES
TABLES:
TABLE 1 - USGS Gaging Stations
TABLE 2 -Design Flood Flows for the Roaring Fork River
TABLE 3 - Flood Frequency - Elevation and Discharge Data
FIGURES:
FIGURE 1 - Gage Records Roaring Fork River above Difficult Creek near Aspen
FIGURE 2 - Gage Records Roaring Fork River near Aspen
FIGURE 3 - Gage Records Roaring Fork River at Aspen
FIGURE 4 - Gage Records Roaring Fork River at Glenwood Springs
FIGURE 5 - Roaring Fork River Hydrology Summary
DRAWINGS:
RFI: Index Sheet
RFl - RF8: Floodplain Maps
IP - 9P: Floodplain Profiles
RS162 - RSlO: River Cross Sections
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