gis: improvements to dnr permitting and floodplain management lacey duncan may 2012
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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. - PowerPoint PPT PresentationTRANSCRIPT
GIS: Improvements to DNR Permitting and Floodplain Management
Lacey DuncanMay 2012
Improvements in 2011
• DNR Permitting – Public Freshwater Lakes
• Floodplain Analysis / Regulatory Assessment (FARA) Maps
• LiDAR/Orthoimagery Availability
Public Freshwater Lake Permits
IC 14-26-2 Lake Preservation Act
*Underwater Beaches**SeawallsDredgingBoatwells
Group PiersFish Attractors
Aerators
*Shoreline classification required**Shoreline delineation and classification required
Year Permits Inspected
2011 56%
2010 57%
2009 67%
2008 68%
2007 73%
2006 73%
2005 77%
2004 88%
2003 93%
2002 96%
2001 93%
• Rule Changes
• Improved research capabilities
• Triage
• Overall Development on PFL
Inspection Reduction
Transfer of Inspections to Central Office
2000-2010 1 field inspector
2011 8 inspectors
Creation of 3 Regions
Total Public Freshwater Lake Permits
Region 3 Region 2 Region 1
Lake Inspections
Old Method of Shoreline Delineation
• Triangulate every measurement– Required 3 measurements for 1 shoreline break
• Final sketch skewed without compass• IntelliCAD 2000
Old Method of Shoreline Delineation
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
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
Inspection Preparation
Permit Application
Inspection Preparation
Using routefinder9:31 Total Travel Time5:45 Drive Time
Final Lake Sketch
Final Lake Sketch
Long Lake Sketch
West
East
Old Method
New Method
Breaks in Shoreline 18 18
Tie Points Needed 72 54
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
Old Method
Pre-DFIRM
The Driving Forces
April 201232 Counties
March 201111 Counties
New Floodplain Mapping
Electronic Submittals
INdiana Floodplain Information Portal
New DFIRM
New FARA Format
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
The .mxd
DNR Floodplain Map
Zone AE/Floodway
DNR Floodplain Map
Zone A
2011 LiDAR and Orthoimagery
• New Imagery for DNR Floodplain Map and Lake Sketches
• Increasing Hydraulic Ratings
20112005
3D Analyst
2011
Improving the Accuracy of the FARA
2005
Improving the Accuracy of the FARA
2011
2005
Increasing Elevation Determinations
Tot
al N
umbe
r
Year
Lacey [email protected]