IMPLEMENTING COMPREHENSIVE

WATERSHED MANAGEMENT

through the

Watershed Management Program

FOR

CITRUS COUNTY

AND

INCORPORATED COMMUNITIES

May 9, 2006

What Does Flood Protection Mean To You?

•Protection of Homes and Structures

•Protection of Areas that Normally, or even Occasionally, Flood

•Loss of Life

Too Much

Too Little

Watershed Evaluation

Watershed Management Plan

Implementation of BMPs

Maintenance ofWatershed Parameters and Models

Topographic Information

Watershed Management ProgramFive Elements

Watershed Evaluation

Watershed Management Plan

Implementation of BMPs

Maintenance ofWatershed Parameters and Models

Topographic Information

Watershed Management ProgramFive Elements

Digital Terrain Model

Topographic Information

Topographic InformationLIDAR Acquisition Simulation

LIDAR – Multiple Returns

zx

y

GPS + INSControlled

1st Return

2nd Return

3rd Return

Multiple ReturnIntensity of Return

POSITION OFINSTRUMENT

LIDAR HEIGHT ANDCOVER DETERMINATION

Watershed Evaluation

Watershed Management Plan

Implementation of BMPs

Maintenance ofWatershed Parameters and Models

Topographic Information

Watershed Management Program

Pictures of a Watershed Evaluation

Watershed Evaluation

Watershed Management Plan

Implementation of BMPs

Watershed Model Updates

Topographic Information

Watershed Management Program

Watershed Model

Floodplain Analysis

Level of Service

BMP Alternative Analysis

Survey

Watershed ParametersIn District’s Standard

GIS Format

FEMA FIRM maps

Watershed Management Plan

Watershed Management Plan

Watershed Model

Floodplain Analysis

Level of Service

BMP Alternative Analysis

Survey

Watershed ParametersIn District’s Standard

GIS format

FEMA FIRM maps

Watershed Model

Floodplain Analysis

Level of Service

BMP Alternative Analysis

Survey

Watershed parametersIn District’s standard

GIS format

FEMA FIRM maps

Watershed Model

Floodplain Analysis

Level of Service

BMP Alternative Analysis

Survey

Watershed parametersIn District’s standard

GIS format

FEMA FIRM maps

High Water Surface

Elevation

Watershed Model

Floodplain Analysis

Level of Service

BMP Alternative Analysis

Survey

Watershed parametersIn District’s standard

GIS format

FEMA FIRM maps

Watershed Evaluation

Watershed Management Plan

Implementation of BMPs

Maintenance ofWatershed Parameters and Models

Topographic Information

Watershed Management Program

Watershed Evaluation

Watershed Management Plan

Implementation of BMPs

Maintenance ofWatershed Parameters and Models

Topographic Information

Watershed Management Program

Maintenance of Watershed Parameters and Models

Watershed Evaluation

Watershed Management Plan

Implementation of BMPs

Maintenance ofWatershed Parameters and Models

Topographic Information

ERP Permitting

Desired Watershed Condition

Watershed Model

How do We work toward the Desired Watershed Condition?

COORDINATION

Watershed Management Program Coordination Document

• The WMP document was started in 2003 and is continually being updated.

• Continued cooperation and coordination is a beneficial and efficient use of resources.

• Recognize that each agency has flood protection responsibilities.

• County and SWFWMD each are committing approximately $1,000,000 annually to the WMP.

• FEMA has provided $800,000 to update DFIRMs

Basin Boundaries

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11

12

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13

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Holder

Lecanto

Dunnellon

Inverness

Homosassa

Red LevelStokes Ferry

Crystal River

Chassahowitzka

Homosassa Springs

Aerial Topography (LiDAR)

2004

20062006

Cities

Roads

Watershed

Complete

On Going

Not Scheduled

2006

2007

2008

2009

2010

2011

2012 - 2016

Watershed Evaluation

−

4A Citrus County WMPC

3

56

2

9

18

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Holder

Lecanto

Dunnellon

Inverness

Homosassa

Red LevelStokes Ferry

Crystal River

Chassahowitzka

Homosassa Springs

Citrus CountyWatershed Management Implementation Costs Summary

Watershed Number Watershed Name FY 2006 FY 2007 FY 2008 FY 2009 FY 2010 FY 2011

FY 2012-2016 Total Costs

1 Lower Withlacoochee River $3,700 $0 $0 $0 $3,000 $35,000 $28,000 $69,7002 Red Level $52,600 $0 $0 $0 $225,000 $358,000 $260,000 $895,6003 Withlacoochee River $0 $0 $0 $329,000 $367,000 $230,000 $343,000 $1,269,0004 North of Barge Canal $6,900 $0 $0 $0 $0 $10,000 $82,000 $98,9005 Crystal River $85,000 $387,000 $641,000 $370,000 $0 $0 $0 $1,483,0006 Tsala Apopka Outlet $56,100 $239,000 $289,000 $218,000 $0 $0 $0 $802,1007 Shinn Ditch $7,000 $0 $0 $17,000 $48,000 $27,000 $10,000 $109,0008 Ozello $22,100 $0 $0 $65,000 $151,000 $32,000 $0 $270,1009 Homosassa South Fork $45,300 $0 $64,000 $0 $0 $0 $0 $109,30010 Leslie Heifner Canal $4,100 $0 $0 $0 $14,000 $46,000 $6,000 $70,10011 Cardinal Lane $66,100 $234,000 $409,000 $41,000 $183,000 $0 $0 $933,10012 Chassahowitzka River $65,900 $0 $205,000 $311,000 $93,000 $160,000 $0 $834,90013 Lizzie Hart Sink $0 $0 $0 $0 $75,000 $114,000 $93,000 $282,00014 McKethan Lake Outlet $0 $0 $0 $38,000 $88,000 $13,000 $0 $139,00015 Lake Bradley $27,000 $0 $0 $0 $118,000 $180,000 $130,000 $455,00016 Floral City $46,000 $0 $0 $183,000 $279,000 $65,000 $143,000 $716,00017 Inverness $48,300 $172,000 $347,000 $206,000 $0 $0 $0 $773,30018 Center Ridge $0 $326,000 $534,000 $57,000 $254,000 $0 $0 $1,171,00019 Homosassa River - South $4,900 $68,000 $7,000 $28,000 $0 $0 $0 $107,90020 Homosassa River - North $16,200 $155,000 $23,000 $64,000 $0 $0 $0 $258,200

$0 $0 $0 $37,000 $40,000 $44,000 $284,000 $405,000

Total $557,200 $1,581,000 $2,519,000 $1,964,000 $1,938,000 $1,314,000 $1,379,000 $11,252,200$148,700 $307,000 $445,200 $386,500 $304,700 $224,700 $162,700 $1,979,500$129,900 $358,500 $539,300 $595,500 $664,300 $432,300 $526,800 $3,246,600$278,600 $665,500 $984,500 $982,000 $969,000 $657,000 $689,500 $5,226,100

$0 $250,000 $550,000 $0 $0 $0 $0 $800,000

Note:

Maintenance of Watershed Parameters & Models

Costs are for planning purposes only. Actual projects in any given year will require additional project area analysis.

SWFWMD Coastal Rivers Basin Board

County ContributionFEMA Contribution

SWFWMD Withlacoochee River Basin Board

National Flood Insurance Program (NFIP)

• Flood Insurance– Property owners in participating communities

purchase flood insurance

• Floodplain Management– Participating communities adopt and enforce

floodplain management ordinance

• Flood Hazard Mapping– Develop flooding limits

How Do We Make Sound Decisions?

The Result The Result —— Outdated MapsOutdated Maps

Why Update Flood Maps?

• Updated flood maps are critical to:– Reduce potential loss of life and property

through sound floodplain management

– Reduce National Flood Insurance Program (NFIP) and disaster costs

– Protect natural and beneficial values of floodplains

National Flood Map Modernization (Map Mod)

• Nationwide 5-year effort, up to $1 billion

• Update FEMA Flood Insurance Rate Maps (FIRMs) for the entire nation

• Produce quality maps

• Reduce map production time

• Reduce cost/time for future updates

• Produce seamless, nationwide flood data

Map Mod Benefits to Community

• Updated FIRM into a digital product (DFIRM)– GIS information– Includes database

• Improved tool for floodplain management• Provide better flood insurance coverage and rating• Countywide format for DFIRM• Community input into process• Leverage previous community investments• Streamline revision process

Detailed Study Areas

Marion County Flood RiskWatershed Name

Watershed Area

(Sqmi)COUNTY

Effective FEMA Zone

A (Sqmi)

Preliminary DFIRM Zone

A (Sqmi)

Wetland Area

(Sqmi)

Percent Effective Zone A

Percent Pre. DFIRM Zone A

Percent Wetland

Revised Detailed

Non-Revised

Date of Study

Priest Prairie Drain 29.85 Marion 6.19 6.20 2.61 21% 21% 9% X Jan-79Flemington 72.13 Marion 9.88 13.16 3.26 14% 18% 5% X Feb-99Blichton 17.53 Marion 0.38 2.25 0.19 2% 13% 1% X Feb-99West Ocala 21.96 Marion 0.27 0.27 0.09 1% 1% 0% X Jan-79Lake Stafford South 13.15 Marion 0.12 0.12 0.08 1% 1% 1% X Jan-79Lake Stafford East 34.31 Marion 1.63 1.64 0.30 5% 5% 1% X Jan-79Hog Prairie 55.10 Marion 5.28 13.21 1.29 10% 24% 2% X Aug-00Cotton Plant 1 6.34 Marion 0.00 1.18 0.07 0% 19% 1% X Aug-00SR200 20.96 Marion 0.04 4.07 0.06 0% 19% 0% X Aug-00SR200 (Martel) 5.20 Marion 0.00 0.95 0.00 0% 18% 0% X Aug-00Ocala (Northwest Ocala) 17.47 Marion 0.26 3.13 0.23 1% 18% 1% X Aug-00Cotton Plant 2 15.34 Marion 0.07 1.99 0.03 0% 13% 0% X Aug-00Cotton Plant 3 12.28 Marion 0.00 1.98 0.01 0% 16% 0% X Aug-00Blue Run 67.78 Marion 2.39 2.42 1.66 4% 4% 2% X Jan-79Withlacoochee River 66.60 Marion 28.04 28.69 11.74 42% 43% 18% X Feb-76East Bronson 6.14 Marion 1.48 1.51 0.98 24% 25% 16% X Jan-79Bell Branch 4.14 Marion 1.79 1.78 1.67 43% 43% 40% X Jan-79Turner Creek 1.97 Marion 0.25 0.25 0.49 13% 13% 25% X Jan-79Gum Swamp 36.14 Marion 6.26 6.25 2.83 17% 17% 8% X Jan-79Big Jones Creek 8.85 Marion 0.10 0.10 0.05 1% 1% 1% X Jan-79Withlacoochee Region 11.97 Marion 1.40 2.66 0.10 12% 22% 1% X Aug-00Withlacoochee River 2 Marion 0.00 0.00 0.00 0% 0% 0% X Feb-76Ocala 18.88 0.33 3.48 2% 18% X Aug-00Bellview 2.43 0.01 0.51 0% 21% X Aug-00

Total 546.52 66.16 97.80 27.73Revised-detailed 234.32 17.65 48.57 5.25 8% 21%

Sq Mi 30.91Acres 11298 31083

19785

Citrus CountyWATERSHED MANAGEMENT PROGRAM

COORDINATION DOCUMENT

Memorandum of Understanding

• Data Collection

• Watershed Characterization

•Floodplain Analysis

•Implementation

Review and Adoption

DFIRMs - 2009

NEXT STEPS

• Complete LiDAR• Continue Coordination on MOU• Complete Watershed Basin Studies• Create and Adopt DFIRMs• Update when New Studies are Complete• Identify and Construct Stormwater

Improvements to Correct Deficiencies in Level of Service

Overflow Structure

Canal Project

Questions?