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GIS: Improvements to DNR Permitting and Floodplain Management Lacey Duncan May 2012

GIS: Improvements to DNR Permitting and Floodplain Management Lacey Duncan May 2012. Improvements in 2011. DNR Permitting – Public Freshwater Lakes Floodplain Analysis / Regulatory Assessment (FARA) Maps LiDAR/Orthoimagery Availability. Public Freshwater Lake Permits.

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GIS: Improvements to DNR Permitting and Floodplain Management Lacey Duncan May 2012

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  1. GIS: Improvements to DNR Permitting and Floodplain Management Lacey Duncan May 2012

  2. Improvements in 2011 • DNR Permitting – Public Freshwater Lakes • Floodplain Analysis / Regulatory Assessment (FARA) Maps • LiDAR/Orthoimagery Availability

  3. Public Freshwater Lake Permits IC 14-26-2 Lake Preservation Act *Underwater Beaches **Seawalls Dredging Boatwells Group Piers Fish Attractors Aerators *Shoreline classification required **Shoreline delineation and classification required

  4. Inspection Reduction • Rule Changes • Improved research capabilities • Triage • Overall Development on PFL • 2000 • 1999 2005

  5. Transfer of Inspections to Central Office 2000-2010 1 field inspector 2011 8 inspectors Creation of 3 Regions

  6. Total Public Freshwater Lake Permits Region 3 Region 2 Region 1

  7. Lake Inspections

  8. Old Method of Shoreline Delineation • Triangulate every measurement • Required 3 measurements for 1 shoreline break • Final sketch skewed without compass • IntelliCAD 2000

  9. Old Method of Shoreline Delineation

  10. Lake Inspection Need • Efficient data collection prior to inspection • Decrease time in field • Little commitment in office upon return • Keep re-inspections to a minimum • Improved quality product for customer

  11. Inspection Preparation • Prepare lake sketch • Identify 250’ range for site • Locate staff gage and legal lake level data • Research relevant permits • Shoreline Classification • Permitted Seawalls • Unresolved Violations

  12. Inspection Preparation Permit Application

  13. Inspection Preparation Using routefinder 9:31 Total Travel Time 5:45 Drive Time

  14. Final Lake Sketch

  15. Final Lake Sketch

  16. Long Lake Sketch West East

  17. Floodplain Analysis and Regulatory Assessment (FARA) A thorough approach to the response letter • Connect the FARA to the legend in the map • Address floodway and flood insurance • Electronic signatures • Emailed Response

  18. Old Method

  19. Pre-DFIRM

  20. The Driving Forces Electronic Submittals New Floodplain Mapping April 2012 32 Counties March 2011 11 Counties

  21. INdiana Floodplain Information Portal

  22. New DFIRM

  23. New FARA Format

  24. Development of the .mxd • Getting the Shapefiles • Published Special Flood Hazard Area • Preliminary Special Flood Hazard Area • Ohio River Floodway • Improving the Process • Using the DFIRM Political Areas to determine local Floodplain Administrator • Developing the map language

  25. The .mxd

  26. DNR Floodplain Map Zone AE/Floodway

  27. DNR Floodplain Map Zone A

  28. 2011 LiDAR and Orthoimagery • New Imagery for DNR Floodplain Map and Lake Sketches • Increasing Hydraulic Ratings 2005 2011

  29. 3D Analyst 2011

  30. Improving the Accuracy of the FARA 2005

  31. Improving the Accuracy of the FARA 2011 2005

  32. Increasing Elevation Determinations Total Number Year

  33. Lacey Duncan lduncan@dnr.in.gov

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