FLOOD10475

• Designation Number: 594
• County: Jefferson
• Community: Jefferson County and Incorporated Areas
• Title: FIS - Jefferson County and Incorporated Areas - Vol 2
• 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 INTR 0 D U CTI ON . 0 . . . . . . .0 . . . . . . . . . 0 . . . 0 . . .. . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . · · · · · · .. · · · · · . .. .. 1

1.1 Purpose of Study...................................................... . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . .. . . . . . . . · .. . . . · .. 1

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

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

2.0 AREA STUDIED ........................................................................................................................... 5

2. 1 Scope of Study. 0 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 0 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . · · . · · . . . . . . . . . · .. 5

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

2.3 Principal Flood Problems.................................................................................................. 13

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

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

3.1 " Hydrologic Analyses............... 0............................................ 0.....0............0......................... 24

3. 2 Hydraulic Analyses ................................0... 0 . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . · · . . . .. 30

4.0 FLOODPLAIN MANAGEMENT APPLICATIONS......... eo....................... eo......................... II 49

4. 1 Flood plain B 0 un dari e s . . . . . . . . 0 . . . . . . . . . . . . . . . . . . . 0 . . . 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 49

4 . 2 Flood way s . . . . . . . . . . 0 . . . 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 . . . . . . . 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 . . 0 . 0 . . . . . .. . . . . . 0 . . 0 . . : . . . .. 50

5.0 INSURANCE APPLICATION............................................................. 0..... .......0.......0................ 51

6.0 FLOOD INSURANCE RATE MAP ....0..............................0.0............... ....0............... ............ ..0.0 75

7.0 OTHER STUDIES..o........o........... 0... .0. ..0.0..........0........0..................0............................................. 77

8.0 LOCA TI 0 N OF D A T A .. .. . . . . . . .. .. . . . .. . . . . .. . .. . . .. .. . . . . . . . . . .. . . . . . '. . . . . . . .". . 0 . .. . . .. . . . . . . . . . . . 0 . . .. . . .. . . . . . .. . .. . . . . . . . . . . .. 78

9.0 BIBLIOGRAPHY AND REFERENCES .............. ............... ..................... ........ ....... ......... ........ 78