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

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Presentation on theme: "GIS: Improvements to DNR Permitting and Floodplain Management Lacey Duncan May 2012."— Presentation transcript:

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 Year Permits Inspected 201156% 201057% 200967% 200868% 200773% 200673% 200577% 200488% 200393% 200296% 200193% Rule Changes Improved research capabilities Triage Overall Development on PFL Inspection Reduction General License Unity Database Triage 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 3Region 2Region 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 Research site Conduct inspection Complete final sketch

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

16 Long Lake Sketch West East Old Method New Method Breaks in Shoreline 18 Tie Points Needed 7254

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 April 2012 32 Counties March 2011 11 Counties New Floodplain Mapping Electronic Submittals

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 20112005

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 No Elevation Data Send Cross Section Letter Property Owner Hires Surveyor Submits Survey to DNR DNR sends FARA

33 Lacey Duncan lduncan@dnr.in.gov


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