1. Hurricane Ike Recovery Efforts in Unincorporated Areas of Galveston County Presented to NWF Conference February 28, 2012 Michael Tehrani, P.E., CFM Dewey H. Brunt III, P.E.

2. Hurricane Ike Recovery Hurricane Ike Landfall on Galveston Island on September 13, 2008 Category 2 Storm - sustained winds of 110 mph, storm surge 5 to 17 feet. Estimated $27 billion in damages, 3 rd costliest in U.S. history. Thousands of homes damaged or destroyed. Damage Inspection Teams from 3 consultants were mobilized on September 21, 2008.

3. Hurricane Ike Recovery Galveston County Storm Surge 12.0 ft 16.0 ft 12.6 ft 14.8 ft

4. Hurricane Ike Recovery Galveston County Inundation Depths

5. Hurricane Ike Recovery NFIP Requirements Substantially Damaged Structures are those that the cost of restoring the structure to its pre-damage condition equals or exceeds 50 percent of the pre-damage market value. When repaired, Substantially Damaged Structures within the floodplain are required to have the lowest floor elevated to or above the base flood elevation.

6. Hurricane Ike Recovery Problem Thousands of structures damaged or totally destroyed Displaced residents needed to get back to their homes to begin repairs Determine degree of damage to structures so that building permits could be issued

7. Hurricane Ike Recovery Damage Assessments Galveston County Unincorporated Areas –Mainland –Bolivar Peninsula Phased Process –Preliminary Damage Assessments –Detailed Inspections / Residential Substantial Damage Assessments (RSDE)

8. Hurricane Ike Recovery Damage Assessment Tools GIS Galveston County Appraisal District (GCAD) FIRM Maps FEMA’s RSDE Software, Forms & Guidelines Aerial Images –Pre Ike –Post Ike Excel Summary Sheet

9. Hurricane Ike Recovery Challenges for Processing the Data Thousands of Structures required Inspection Coordination Between Consultants Coordination with Galveston County Coordination Between Office and Field Inspection Crews Accuracy Consistency Organization and Accountability

10. Hurricane Ike Recovery Why Use GIS? Organizational Integration GCAD Data RSDE Software Excel Spreadsheet (Summary Report) Aerial Photos Inspection Photos Make Better Decisions Query Information Analyze Information Make Maps Excellent Quality High Flexibility Very Fast

11. Hurricane Ike Recovery Organizational Integration

12. Hurricane Ike Recovery GCAD Data Example

13. Hurricane Ike Recovery GCAD Data - San Leon

14. Hurricane Ike Recovery BROADWAY ST Huitt-Zollars Project Limits

15. Hurricane Ike Recovery Floodplain Boundary

16. Hurricane Ike Recovery Structures to be Inspected

17. Hurricane Ike Recovery GIS Map-Making Example – San Leon Overlay with parcel and address data Overlay with aerial photo Identify parcels to be inspected Verify number of structures on each parcel Expedited damage inspections

18. Hurricane Ike Recovery Preliminary Damage Assessment Map

19. Hurricane Ike Recovery Detailed Inspection Map

20. Hurricane Ike Recovery Substantially Damaged Structures

21. Hurricane Ike Recovery Preliminary Damage Assessment Structures Minimal or Minor Damage 1,236 Potential Substantial Damage1,774 Total 3,010 Unincorporated Mainland Area Of the 1,774 Potential Substantial Damage Structures, 564 were classified as Substantially Damaged. Detailed Inspection

22. Hurricane Ike Recovery Use of Pre- and Post-Ike Pictometry Overlay with parcel and address data Identify totally destroyed structures Identify parcels to be Inspected Expedited damage inspections GIS Map-Making Example – Bolivar

23. Hurricane Ike Recovery USGS Oblique Aerial Photo of Bolivar Peninsula

24. Hurricane Ike Recovery USGS Oblique Aerial Photo of Bolivar Peninsula

25. Hurricane Ike Recovery Pre–Ike Parcel Map

26. Hurricane Ike Recovery Post–Ike Parcel Map

27. Hurricane Ike Recovery Bolivar Peninsula Structures Minimal or Minor Damage1,064 Potential Substantial Damage 663 Destroyed or Washed Away3,451 Total 5,178 Preliminary Damage Assessment Detailed Inspection Of the 663 Potential Substantial Damage Structures, 229 were classified as Substantially Damaged

28. Hurricane Ike Recovery Geocoded Photos Reduce Inspection Time Reduce processing Time Increased Organization & Accuracy Improve Decision Process Limited to Outside of Structures New Technology FEMA SDE Program

29. Hurricane Ike Recovery Geocoded Photos 7th

30. Hurricane Ike Recovery Questions