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Published byOswin Pitts Modified over 9 years ago
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GIS: Improvements to DNR Permitting and Floodplain Management Lacey Duncan May 2012
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Improvements in 2011 DNR Permitting – Public Freshwater Lakes Floodplain Analysis / Regulatory Assessment (FARA) Maps LiDAR/Orthoimagery Availability
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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
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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
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Transfer of Inspections to Central Office 2000-2010 1 field inspector 2011 8 inspectors Creation of 3 Regions
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Total Public Freshwater Lake Permits Region 3Region 2Region 1
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Lake Inspections
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Old Method of Shoreline Delineation Triangulate every measurement – Required 3 measurements for 1 shoreline break Final sketch skewed without compass IntelliCAD 2000
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Old Method of Shoreline Delineation
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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
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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
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Inspection Preparation Permit Application
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Inspection Preparation Using routefinder 9:31 Total Travel Time 5:45 Drive Time
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Final Lake Sketch
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Long Lake Sketch West East Old Method New Method Breaks in Shoreline 18 Tie Points Needed 7254
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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
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Old Method
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Pre-DFIRM
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The Driving Forces April 2012 32 Counties March 2011 11 Counties New Floodplain Mapping Electronic Submittals
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INdiana Floodplain Information Portal
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New DFIRM
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New FARA Format
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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
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The.mxd
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DNR Floodplain Map Zone AE/Floodway
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DNR Floodplain Map Zone A
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2011 LiDAR and Orthoimagery New Imagery for DNR Floodplain Map and Lake Sketches Increasing Hydraulic Ratings 20112005
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3D Analyst 2011
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Improving the Accuracy of the FARA 2005
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Improving the Accuracy of the FARA 2011 2005
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Increasing Elevation Determinations Total Number Year No Elevation Data Send Cross Section Letter Property Owner Hires Surveyor Submits Survey to DNR DNR sends FARA
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Lacey Duncan lduncan@dnr.in.gov
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