Slide 1: Hurricane Ivan Surge Inundation Maps Community Coordination Meeting Florida: Escambia, Santa Rosa, and Okaloosa Counties Alabama: Baldwin County December 9, 2004 Slide 2: Meeting Agenda * Introductions * Description of the maps * Where to obtain the maps * Use of the maps for rebuilding * Future outreach efforts * Wrap up Slide 3: Introductions FEMA Staff * Todd Davison – Flood Insurance and Mitigation Division Director, Region IV * Shabbar Saifee – Project Monitor Contractor Staff * Gib Jones, Dewberry * Steve Pardue, URS Corporation * Lyle Hatchett, URS Corporation Slide 4: Purpose of the Project * To develop maps depicting the surge effects of Hurricane Ivan * To provide Ivan-related hazard information to aid in mitigating future flood damages during recovery and redevelopment * To identify areas where more detailed coastal studies are warranted Slide 5: Graphic of one of the Ivan Overview Maps Slide 6: Graphic of a sample Ivan Surge Inundation Map panel Slide 7: Data Themes Presented on the Maps * Base map of aerial photographs * Coastal High Water Marks (HWMs) * Inundation limits * Waterborne debris line * Surge elevation contours * Current FEMA Flood Insurance Rate Maps (FIRM) flood zones and elevations Slide 8: Coastal High Water Marks (HWMs) * Identified and surveyed in the months following Hurricane Ivan * Additional HWM data from National Oceanic and Atmospheric Administration (NOAA), U.S. Army Corps of Engineers (USACE), and local communities (Destin, Santa Rosa County) * HWM data include: * Mud lines * Water stains * Debris * Eyewitness testimony * Some HWM elevations may include wave effects and runup Slide 9: Inundation Limits * Mapped coastal HWM elevations onto digital, pre-storm topographic contour data * Attempted to exclude wave effects * Compared to debris line, and adjusted if appropriate Slide 10: Debris Lines * Delineated from aerial photography flown by the USACE a few days after the storm Surge Elevation Contours * Surge contours mapped at 1-foot intervals based upon coastal HWM elevations * Generalized maximum surge elevation (inherent uncertainty and random and irregular spacing of coastal HWMs) * Contours do not include wave effects Slide 11: Thanks to everyone who provided data! NOAA * USACE * Local counties and communities * Northwest Florida Water Management District * State of Alabama Slide 12: Where to Obtain the Maps www.ivanfloodrecoverymaps.net (correct website address is now www.fema.gov/ivanmaps) Graphics showing front page of website Slide 13: Where to Obtain the Maps www.ivanfloodrecoverymaps.net (correct website address is now www.fema.gov/ivanmaps) Graphics showing one county’s sub-page Slide 14: Where to Obtain the Maps www.ivanfloodrecoverymaps.net (correct website address is now www.fema.gov/ivanmaps) Graphics showing GIS download page Slide 15: How to Use These Maps * These maps document the effects of Hurricane Ivan surge * While they are not directly comparable to effective FIRMs, they can be used to communicate the risks of coastal flooding * Lay the foundation for additional future study How Not to Use These Maps * Flood insurance determinations or insurance rating Slide 16: Future Outreach Activities * Public Meeting on December 16, 2004 * Follow-up technical assistance meetings in January, where necessary Slide 17: Wrap Up * Questions/discussion?