SARASOTA COUNTY FLOODPLAIN MANAGEMENT PLAN Sarasota County | June 2018 SARASOTA COUNTY FLOODPLAIN MANAGEMENT PLAN Prepared for: Sarasota County 1001 Sarasota Center Blvd. Sarasota, Florida 34240 Prepared by: Jones Edmunds & Associates, Inc. 730 NE Waldo Road Gainesville, Florida 32641 Certificate of Engineering Authorization #1841 Jones Edmunds Project No.: 19006-049-01 June 2018 REVISIONS Date Revision June 2018 Revisions TABLE OF CONTENTS 1 INTRODUCTION .................................................................................................................................. 1-1 Purpose .................................................................................................................................................. 1-1 Community Profile .................................................................................................................................. 1-3 Geographic Profile ............................................................................................................................. 1-3 Topography ........................................................................................................................................ 1-3 Climate ........................................................................................................................................... 1-3 Population and Demographics ........................................................................................................... 1-3 Housing ........................................................................................................................................... 1-4 Economy ........................................................................................................................................... 1-4 National Flood Insurance Program ........................................................................................................ 1-5 Community Rating System ..................................................................................................................... 1-5 2 PLAN ORGANIZATION AND DEVELOPMENT .................................................................................. 2-1 Planning Committee ............................................................................................................................... 2-1 Public Involvement ................................................................................................................................. 2-2 Public Meetings .................................................................................................................................. 2-3 Additional Public Information Activities .............................................................................................. 2-3 Coordination ........................................................................................................................................... 2-6 Review of Existing Studies and Information ....................................................................................... 2-6 Coordination with Other Agencies and Organizations ....................................................................... 2-9 3 ASSESSMENT OF FLOOD HAZARDS ............................................................................................... 3-1 Coastal Flooding .................................................................................................................................... 3-1 Inland Flooding ....................................................................................................................................... 3-4 Tropical Storm / Hurricane ................................................................................................................... 3-11 Historical Claims and Repetitive Loss Areas ....................................................................................... 3-15 4 LESS FREQUENT FLOOD HAZARDS AND OTHER TYPES OF HAZARDS ................................... 4-1 Dam Failure ............................................................................................................................................ 4-1 Levee Failure ......................................................................................................................................... 4-1 Coastal Erosion ...................................................................................................................................... 4-4 Other Hazards ........................................................................................................................................ 4-5 Hail Storm ........................................................................................................................................... 4-5 Lightning ........................................................................................................................................... 4-6 Freeze ........................................................................................................................................... 4-6 Tornado ........................................................................................................................................... 4-6 Land subsidence / sinkholes .............................................................................................................. 4-6 i June 2018 Table of Contents Wildfires ........................................................................................................................................... 4-7 5 FUTURE FLOODING ........................................................................................................................... 5-1 Climate Change and Sea Level Rise ..................................................................................................... 5-1 Future Development in the Watershed .................................................................................................. 5-3 Future Conditions Model ........................................................................................................................ 5-6 6 ASSESSMENT OF IMPACTS DUE TO HAZARDS ............................................................................ 6-1 Life Safety .............................................................................................................................................. 6-1 Public Health .......................................................................................................................................... 6-4 Critical Facilities and Infrastructure ........................................................................................................ 6-5 Economy and Major Employers ............................................................................................................. 6-7 Residential and Commercial Buildings .................................................................................................. 6-7 7 NATURAL FLOODPLAIN FUNCTIONS .............................................................................................. 7-1 Beneficial Resources and Functions of Natural Floodplains ................................................................. 7-1 Natural Flood Storage and Erosion Control ....................................................................................... 7-1 Water Quality and Aquifer Recharge ................................................................................................. 7-1 Fish and Wildlife Habitat .................................................................................................................... 7-1 Recreation .......................................................................................................................................... 7-2 Economic Benefit ............................................................................................................................... 7-2 Protecting Our Natural Floodplains ........................................................................................................ 7-2 8 FLOODPLAIN MANAGEMENT PLAN GOALS AND ACTIVITIES ..................................................... 8-1 Goals ................................................................................................................................................... 8-1 Review of Possible Floodplain Management Activities .......................................................................... 8-1 Integration with Sarasota County Post-Disaster Redevelopment Plan ............................................... 8-20 Integration with Sarasota County Local Mitigation Strategy ................................................................ 8-20 9 FLOODPLAIN MANAGEMENT ACTION PLAN .................................................................................. 9-1 Coordination with Other County Initiatives ............................................................................................. 9-1 10 PLAN ADOPTION, IMPLEMENTATION, EVALUATION AND REVISION ....................................... 10-1 11 REFERENCES ................................................................................................................................... 11-1 LIST OF TABLES Table 2-1 Floodplain Management Plan Committee Members ........................................................ 2-1 Table 2-2 FMP Committee Meetings ............................................................................................... 2-2