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May 24, 2007

FEMA Texas Gulf Coast Mapping after Hurricane Rita Stephen C. Altman, P.E., CFM Michael Baker, Jr. Inc. May 24, 2007. Outline. Pre-Hurricane Hurricane Rita Post Hurricane. Pre-Hurricane. One Texas Coastal County in Post Preliminary Process Harris County (Effective 6/18/2007)

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May 24, 2007

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  1. FEMA Texas Gulf Coast Mapping after Hurricane RitaStephen C. Altman, P.E., CFMMichael Baker, Jr. Inc. May 24, 2007

  2. Outline • Pre-Hurricane • Hurricane Rita • Post Hurricane

  3. Pre-Hurricane • One Texas Coastal County in Post Preliminary Process • Harris County (Effective 6/18/2007) • Five Texas Coastal Counties initiated with FY05 Flood Map Modernization Funds • Brazoria County • Cameron County • Chambers County • Galveston County • Nueces County

  4. Pre-Hurricane • Topographic Data • Existing Topographic Data • Coastal Storm Surge • Identified as need by FEMA Region VI • USACE-NO • USACE-ERDC • RMC VI • Methodology • ADCIRC • WHAFIS • Funding Limited

  5. Hurricane Rita • September 23, 2005

  6. Hurricane Rita • Landfall September 23, 2005 • Presidential Declared Disaster September 25, 2005 • Damages > $10 Billion (includes Texas and Louisiana)

  7. Post Hurricane • Storm Surge • New Topographic Data • DFIRM Mapping

  8. Storm Surge • Expanded Scope from Pre-Hurricane • Storm Surge Analyses for all 18 Texas Coastal Counties • Expanded Resources for Analyses Team • USACE-NO Nationwide Team • IPET participants • Methodology • Joint Probability Method (JPM) • ADCIRC • STWAVE • WHAFIS • Identical for Texas and Louisiana

  9. Storm Surge • Need for updated Topographic Data • USGS DEM Disadvantages • Too Coarse for Detailed Coastal Mapping • Age of Data • Subsidence • LiDAR Advantages • More Detailed • Flown in 2006 • Schedule • Kick-off April 2007 • Complete December 2007

  10. Topographic Data • Existing Data • Harris County LiDAR Data • Corpus Christi LiDAR Data • TNRIS LiDAR Data (Cameron and Willacy Counties) • Various Community Topographic Data Sets • 10 and 30 Meter USGS DEM

  11. Topographic Data • New LiDAR Data Needed • FEMA Region VI funds (MapMod and DRF) • Leverages Investment in Coastal Analyses • Data to be Acquired/Developed • Bare Earth DEM • Breaklines • 2-foot Contours • Data will be available from TNRIS to Communities

  12. Partners Funded in FY06 to Acquire LiDAR data FEMA IDIQ Nueces County (outside Corpus Christi) TNRIS (FEMA CTP) Aransas Brazoria Calhoun Chambers Galveston Jackson Topographic Data • Jefferson • Matagorda • Orange • Refugio • San Patricio • Victoria

  13. Schedule FEMA IDIQ All data has been submitted to FEMA TNRIS All data has been acquired Bare Earth Data approved in 7 of 12 Counties Breaklines to be submitted to FEMA in June and July 2007 Contour Processing to be submitted late summer 2007 Topographic Data

  14. FY06 Funding Cycle 5 Counties Funded with Disaster Recover Funds (DRF) Chambers, Galveston, Harris, Jefferson, and Orange Covers Coastal Analyses 15 of 18 Coastal Counties Funded with MapMod Funds Includes all Five Counties with FY05 Funding Includes Harris County Will Be Mapped as Physical Map Revision (PMR) Covers all tasks for Non-DRF Counties Covers DFIRM Mapping Tasks for DRF Counties DFIRM Mapping

  15. FY07 MapMod Funding Cycle 2 Additional Counties Kleburg Willacy Schedule Preliminary Maps for all 17 Counties by end of FY08 DFIRM Mapping

  16. DFIRM Mapping

  17. Questions?

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