FLOOD10513 ‎(2)‎

• County: Garfield
• Community: Garfield County and Unincorporated Areas
• Title: FIS - Garfield County and Unincorporated Areas - Vol 2
• Date: 8/2/2006
• Prepared For: Garfield County
• Prepared By: FEMA
• Floodplain - Doc Type: Current FEMA Regulatory Floodplain Information

TABLE OF CONTENTS

Pa2e

1.0 INTR 0 D U CTI ON. . . . . . . . . . . . . .. . ..Oo ... . . . . . . . . . . . . . . . . . . . . .. . .. .Oo . . . ... . . . . . . .. ... .. . . . . . .. . . . . . . ... . . . . . .. .. ... . . . . . . . .. .. .. . . . . . . . . . . .. . . . . . . . . .. ... . .. .. . .. 1

1 . 1 Purpose of Study.......... . . .... . .. . .. . . .. . .. . . . . .. ... . . . . . . ... .. . .. .. .. . .. . .. . ... .. . .... .. .. . . . . .. . .. . .. .. .. .. .. . .. .. .. . .. .. ... .. . . .. . . . . . . . . . . . . ... .. ... . . . ... . ... .. . . . . ... 1

1.2 Authority and Acknowledgments u....... u..... .......................................................... ................................................1

1.3 Coordination........ ........ ........ ..... ......................................................... ............................................. ...... 2

2.0 AREA STUDIED......................................................................................................................................................... .. .. . . 2

2.1 Scope of Study. .... .. . . . . .. . ... ... .. . .. . .. . .. ... . ... . . ... .... . . . .... . . ... .... . .... Oo.Oo ........ .. ... . . .... .... . . . . ... . . . . . .. . . . . . . . .... . ......... . ... . . ... .. .. .. .. 2

2.2 Community Description...................................................................................................................................... 5

2.3 Principal Flood Prob lerns..... .. . .. ...... . .... ..... . .. . . . . . . .. ..... . . . ... ... ... ..... ........ . ..... .... .. .. . .. . . .. . . ..... . . ... . ... . . .. .... . .... . . . Oo.... .... . .. .. .. 7

2.4 Flood Protection Measures .....................................................................Oo.......................................Oo.... 8

3.0 ENGINEERING METHODS........... Oo.................... ........ ....... .... .Oo.......... .................... OoOo.. ......... Oo.... ...... 9

3 .1 Hydrologic Analyses.................................................................................................................... 9

3. 2 Hydraulic Analyses................................................................................................................ 12

3 . 3 Vertical Datum .............................Oo..Oo..............Oo........................................Oo....Oo.Oo.............Oo.OoOo............. 14

4.0 FLOODPLAIN MANAGEMENT APPLICATIONS .....................................................................15

4.1 Floodplain Boundaries............................................................................................................ 15

4.2 Flood ways. . . . . . . . . . .. .. . .. . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . .. . . .. . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . .. . . . . . . . .. . .. . . . . . . .. . . .. . ... 1 6

5.0 INSURANCE APPLICATION. .... ........................... .Oo.... ......... .Oo.........................OoOo.......... ............ ....18

5.1 Reach Determinations................................................................................................................ .18

5.2 Flood Hazard Factors................... ....................Oo........................................ .............................Oo..... ..19

5.3 Flood msuran ce Zones.................................................................................................................. 1 9

6.0 FLOOD INSURANCE RATE MAP........ ... ......... ............ .... ... ... ... .... ...... ...... ...... .......... ...... ..... .... ..20

7 . 0 0 THE R STUD IE S. . .. . . . . . . . . . . . . . .. . . . . . . . . .. . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . .. . . . . . . . . . . . . .. . . . ... . . 2 0

8.0 L 0 C A TI ON OF D AT A... . .. . . . .. ... . . . .. .. Oo" .. .. . . ... .. . . .. .. . . . .. .. .. .... . . .. .. . . .. .. .. ... .. . . . . . .. .. .. . . . .. . . . .. .. .. . .. . . . .. . . .. . . .. . . . . . . .. . .. . .' . . . . .. . . . . . . . .. .. . . .. .. . .. 21

9.0 BffiLIOGRAPHY AND REFERENCES ...... ................................... ....................................... .............21