FLOOD10479

• Designation Number: 594
• County: Jefferson
• Community: Jefferson County and Incorporated Areas
• Title: FIS - Jefferson County and Incorporated Areas - Vol 6
• Date: 6/17/2003
• Prepared For: Jefferson County
• Prepared By: FEMA
• Floodplain - Doc Type: Current FEMA Regulatory Floodplain Information

TABLE OF CONTENTS

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1.0 INT ROD U C TI 0 N ......................................................................................................................... 1

1 . 1 Purpo se of S tu d y ..... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . .. 1

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

1.3 Coordination ............................................................................................................. 0 . . .. . . . .. 3

2.0 AREA STUD lED ........................................................................................................................... 5

2.1 S cope of Study.................................................................................................................... 5

2.2 Community Description...................................................................................................... 9

2.3 Principal Flood Prob lerns............. .. .............. ... . .... ....... ........ ... .. .. ... ........ .... ... ... ... ............... 13

2.4 Flood Protection Measures...... .................................. ........................................................ 21

3.0 ENGINEERING METHODS ...... ... ... ...... ... ... .......... ......... ... ......... ....................... ......... .......0....... 24

3 .1 Hydrologic Analyses......... 0.' . . . ... .. .. . . .. .. . . . . . .. . . .. . . . .. . . . 0..... . . . . . . . . . . . . . . .. . . . . . 0.. . . .. .. . . . . ... . . . . . . .. . . . . ... 24

3 . 2 Hydraulic Analyses .... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 30

4.0 FLOODPLAIN MANAGEMENT APPLICA TIONS............................................................... 49

4.1 Flo04p lain Boundaries...................................................................................................... 49

4 . 2 Flood way s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 5 0

5. 0 INSURANCE APPL leA TI ON. . . . . . . . . . .. . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . .. . . . . . .. . . . . . . . . . . . . . . . . . .. 51

6.0 FLOOD INSURANCE RATE MAP. ......................................................................................... 75

7.0 OTHER STUDIES....................................................................................................................... 77

8.0 L 0 C A TI 0 N OF D A T A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 78

9.0 BffiLIOGRAPHY AND REFERENCES ..... ......... .......... ...................................... .................... 78