FLOOD02256

• Designation Number: 431
• County: Larimer
• Community: Unincorporated Larimer County
• Basin: South Platte
• Title: Flood Insurance Study - Larimer County, CO, Unincorporated Areas Volume I of III
• Date: 3/1/1996
• Designation Date: 7/1/1996
• Floodplain - Doc Type: Floodplain Report/Masterplan

TABLE OF CONTENTS
Volume 1
Pae:e
1.0 INTRODUCTION . . . . . . , . . . 1
1.1 Purpose of Study . . . . . . 1
1.2 Authority and Acknowledgments 1
1.3 Coordination , . . . . . 1
,.
2.0 AREA STUDIED . . . . . . . . . . 2
~ 2.1 Scope of Study . . . 2
2.2 Community Description . 4
2.3 Principal Flood Problems . . . . 6
2.4 Flood Protection Measures . 10
3.0 ENGINEERING METHODS . . . . . . . . . . . 11
3.1 Hydrologic Analyses . . 12
3.2 Hydraulic Analyses . . . . . 13
4.0 FLOOD PLAIN MANAGEMENT APPLICATIONS . , 21
4.1 Flood Boundaries . . 21
4.2 Floodways . . . . . . . . 22
5.0 INSURANCE APPLICATION . . . . . . , . . . . 67
5.1 Reach Determinations . . . 67
5.2 Flood Hazard Factors . . . . 67
5.3 Flood Insurance Zones . . . . 74
5.4 Flood Insurance Rate Map Description . . . 74
.
6.0 OTHER STUDIES . . . . . . . . . . 75
.
7.0 LOCATION OF DATA . . . . . . . . 76
8.0 BIBLIOGRAPHY AND REFERENCES . . . . . . . . . 76
9.0 REVISION DESCRIPTIONS . . . . . . . . . . . . 80
9.1 First Revision 81
9.2 Second Revision . . . 86

i