gis: improvements to dnr permitting and floodplain management lacey duncan may 2012

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 Duncanlduncan@dnr.in.gov