Georgia Flood Risk Mapping Assessment and Planning (MAP) Program - - PowerPoint PPT Presentation

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Georgia Flood Risk Mapping Assessment and Planning (MAP) Program - - PowerPoint PPT Presentation

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Georgia Flood Risk Mapping Assessment and Planning (MAP) Program Heart of Georgia Altamaha Regional Commission June 27, 2019 Haydn Blaize, Manager, Floodplain Unit Role of State The State of Georgia entered into a Cooperating Technical

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Georgia Flood Risk Mapping Assessment and Planning (MAP) Program

Haydn Blaize, Manager, Floodplain Unit Heart of Georgia Altamaha Regional Commission June 27, 2019

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Role of State

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  • The State of Georgia entered into a

Cooperating Technical Partner (CTP) agreement with FEMA’s Region IV in August 1999.

  • State of Georgia now develops and

updates the flood hazard maps for communities in all 159 counties

https://msc.fema.gov/portal/home

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Role of State Cont’d

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The Floodplain Unit provides community outreach and assistance through a structured Community Assistance Program State Support Services Element (CAP SSSE)

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Regulatory Products

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  • DIGITAL FLOOD INSURANCE RATE MAP

(DFIRM)

  • Delineates the Special Flood Hazard Area (area

inundated by the 1% annual chance flood often referred to as the 100-year flood)

  • Flood Risk Zones
  • Base Flood Elevations for Detailed Studies –

water surface elevation during passage of the 1% annual chance flood

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Map Update Process 3-5 Years for Watershed

Discovery Multi-Agency Coordination Meeting Kick-off Meeting Engineering Flood Risk Review Meetings Preliminary FIRMs & FIS

PRELIMINARY PROCESSING POST PRELIMINARY PROCESSING

PDCC Meetings & Open Houses Resolve Appeals & Protests Letter of Final Determination Resilience Meeting Six Month Compliance Period Effective FIRMS & FIS Formal 90- day Appeal Period

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Standard Products

Areas of Mitigation Interest (AOMI) HAZUS Loss Estimates Depth & Probability Grids Changes Since Last FIRM

Non Regulatory Flood Risk Products

  • Levees, dams, other flood control

structures

  • Stream flow constrictions
  • Past Claims Hotspots
  • Key Emergency Routes overtopped
  • At Risk Critical Facilities
  • Areas of significant erosion
  • Significant Land Use Changes
  • Ranking infrastructure, critical facilities,

homes, or parcels based on frequency and/or depth of flooding

  • Identification of mitigation strategies &

potential actions

  • Identification of properties at risk to dam

inundation

  • Ranking repetitive loss properties based
  • n frequency of flooding
  • Identification of technical & funding

resources

  • Level 1 Analysis
  • Average Annualized

Loss Estimates

  • Level 2 Analysis
  • Standard
  • 10%, 4%, 2%, 1%, and 0.2%

annual chance flood frequencies

  • Percent Annual Chance Grid
  • Percent Chance over 30 yrs
  • Water surface elevation grids

(multi-frequency)

  • 20% Annual Chance Flood

Frequency

  • Freeboard Grid
  • Velocity Grids
  • Horizontal Changes in

Flood Hazard Areas

  • Affected structures

and/or population

More accurate loss estimates are produced by including detailed information

  • n local hazard

conditions and/or by replacing the national default inventories with more accurate local inventories of buildings, essential facilities and other infrastructure.

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Role of Community

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  • State and local governments are required to enforce floodplain

management ordinances

  • Residents and business owners with buildings in SFHAs required to

purchase flood insurance

  • Not in the SFHA ? – ALL can purchase flood insurance
  • Close to 35% of claims are from properties NOT in a SFHA
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Role of Community (Cont’d)

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  • A community that does not participate in the NFIP

faces the following challenges:

  • Flood insurance not available through the NFIP
  • No federal flood related grants or loans available
  • No federal flood related disaster assistance available
  • No federal mortgage insurance or loan guarantees

provided

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Regional Information

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Percentage of HoGARC Area in the SFHA Percentage of HoGARC Structures in the SFHA

12% 88% 2% 98%

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Community Information- Percentage

  • f Jurisdictional Area in the SFHA (A-K)

10 5 10 15 20 25 30

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Community Information- Percentage

  • f Jurisdictional Area in the SFHA (L-Z)

11 5 10 15 20 25

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Community Information- Percentage of Jurisdiction’s Structures in the SFHA (A-K)

12 2 4 6 8 10 12

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Community Information- Percentage of Jurisdiction’s Structures in the SFHA (L-Z)

13 1 2 3 4 5 6

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Regional Information

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COMMUNITY NFIP PARTICIPATING POLICIES IN FORCE TOTAL PREMIUM TOTAL COVERAGE TOTAL CLAIMS SINCE 1978 TOTAL PAID SINCE 1978 HoGARC Y: 52; N: 28 477 $363,723 $82,565,100 160 $2,539,494

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Regional Information

15 COMMUNITY NFIP PARTICIPATING POLICIES IN FORCE TOTAL PREMIUM TOTAL COVERAGE TOTAL CLAIMS SINCE 1978 TOTAL PAID SINCE 1978 Abbeville Y 3 $2,048 $428,400 $0 Adrian N $0 $0 $0 Ailey Y $0 $0 $0 Alamo Y $0 $0 $0 Alston Y $0 $0 $0 Appling County Y 56 $37,021 $8,831,200 13 $148,782 Baxley Y 27 $17,640 $4,360,400 8 $100,385 Bellville Y $0 $0 $0 Bleckley Y 3 $15,056 $755,000 $0 Cadwell N $0 $0 $0 Candler County Y 7 $5,059 $1,401,000 $0 Chauncey N $0 $0 $0 Chester N $0 $0 $0 Claxton Y 1 $4,204 $212,400 $0 Cobbtown N $0 $0 $0 Cochran Y 6 $8,146 $509,000 $0 Collins N $0 $0 $0 Daisy N $0 $0 $0 Denton Y 2 $2,434 $331,200 $0 Dexter Y $0 $0 $0

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Regional Information

16 COMMUNITY NFIP PARTICIPATING POLICIES IN FORCE TOTAL PREMIUM TOTAL COVERAGE TOTAL CLAIMS SINCE 1978 TOTAL PAID SINCE 1978 Dodge County Y 9 $6,900 $1,177,000 1 $0 Dublin Y 14 $7,172 $2,926,900 23 $661,137 Dudley N $0 $0 $0 East Dublin Y 5 $3,302 $641,100 16 $411,257 Eastman Y 1 $2,155 $250,000 $0 Emanuel County Y 8 $4,852 $669,500 $0 Evans County Y 9 $4,948 $1,004,200 $0 Garfield N $0 $0 $0 Glennville Y 2 $724 $630,000 2 $33,492 Glenwood Y $0 $0 $0 Graham N $0 $0 $0 Hagan Y 3 $7,050 $461,500 $0 Hazlehurst Y 19 $23,059 $5,005,600 4 $16,992 Helena N $0 $0 $0 Higgston Y $0 $0 $0 Jacksonville Y $0 $0 $0 Jeff Davis County Y 9 $4,259 $767,400 2 $20,617 Jesup Y 41 $27,266 $9,609,700 4 $53,445 Johnson County Y 2 $742 $103,000 1 $36,634 Kite Y $0 $0 $0

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Regional Information

17 COMMUNITY NFIP PARTICIPATING POLICIES IN FORCE TOTAL PREMIUM TOTAL COVERAGE TOTAL CLAIMS SINCE 1978 TOTAL PAID SINCE 1978 Laurens County Y 24 $17,345 $3,723,000 3 $170,010 Lumber City Y 2 $830 $560,000 5 $80,966 Lyons Y 1 $320 $210,000 1 $1,140 Manassas N $0 $0 $0 McRae Y $0 $0 $0 Metter Y 12 $19,982 $2,071,200 1 $3,538 Milan N $0 $0 $0 Montgomery County Y 15 $12,914 $1,404,700 18 $255,044 Montrose N $0 $0 $0 Mount Vernon Y 1 $320 $210,000 4 $1,789 Nunez N $0 $0 $0 Oak Park N $0 $0 $0 Odum Y $0 $0 $0 Pineview N $0 $0 $0 Pitts N $0 $0 $0 Pulaski Y 1 $1,067 $93,500 $0 Reidsville Y 1 $137 $20,000 1 $30,836 Rentz N $0 $0 $0 Rhine N $0 $0 $0 Rochelle N $0 $0 $0

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Regional Information

18 COMMUNITY NFIP PARTICIPATING POLICIES IN FORCE TOTAL PREMIUM TOTAL COVERAGE TOTAL CLAIMS SINCE 1978 TOTAL PAID SINCE 1978 Santa Claus N $0 $0 $0 Scotland Y 1 $462 $145,200 $0 Screven County Y 12 $8,828 $2,251,300 1 $0 Soperton Y $0 $0 $0 Stillmore N $0 $0 $0 Summertown N $0 $0 $0 Surrency N $0 $0 $0 Swainsboro Y 8 $5,331 $1,305,500 2 $10,203 Tarrytown N $0 $0 $0 Tattnall County Y 50 $39,217 $7,101,000 10 $132,903 Telfair County Y 8 $5,165 $1,526,900 1 $11,000 Toombs County Y 34 $16,574 $4,988,100 20 $121,557 Treutlen County Y $0 $0 $0 Twin City N $0 $0 $0 Uvalda Y 2 $2,195 $292,200 5 $23,842 Vidalia Y 20 $8,645 $4,819,700 4 $134,970 Wayne County Y 43 $26,352 $9,507,700 2 $2,743 Wheeler County Y 10 $9,963 $1,016,000 8 $76,212 Wilcox County Y 5 $4,039 $1,244,600 $0 Wrightsville N $0 $0 $0

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JOINING THE NFIP

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Participation in the National Flood Insurance Program (NFIP) is voluntary. To join, the community must:

  • Complete an application;
  • Adopt a resolution of intent to participate and

cooperate with FEMA;

  • Adopt and submit a floodplain management
  • rdinance that meets or exceeds the minimum NFIP
  • criteria. The floodplain management ordinance must

also adopt any FIRM or FHBM for the community.

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Role of Community (Cont’d)

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  • A community that does not participate in the NFIP

faces the following challenges:

  • Flood insurance will not available through NFIP
  • No federal flood related grants or loans available
  • No federal flood related disaster assistance available
  • No federal mortgage insurance or loan guarantees

provided

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Community Rating System

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  • Voluntary incentive program
  • Encourages community floodplain

management activities that exceed the minimum NFIP requirements.

  • Will reduce flood insurance premium rates
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Joining Community Rating System

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NO CRS COMMUNITIES IN REGION

CRS RATING DISCOUNT 10 0% 9 5% 8 10% 7 15% 6 20% 5 25% 4 30% 3 35% 2 40% 1 45%

Best GA Rating - 5

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Disaster Updates Hurricane Irma

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Individual Assistance Applications Approved: 9,398 Total Individual & Households Program Dollars Approved: $13,644,630.64 Total Public Assistance Grants Dollars Obligated: $109,308,033.91

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Disaster Updates Hurricane Michael

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Individual Assistance Applications Approved: 5,007 Total Individual & Households Program Dollars Approved: $11,919,302.16 Total Public Assistance Grants Dollars Obligated: $49,693.68

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Flood Risk Made Available via Website georgiadfirm.com

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Flood Risk Snapshot

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SLIDE 27

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Flood Risk Snapshot

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Georgia Flood MAP Program Projects

Upper Chattahoochee River Basin: Effective 2013 & 2018 Etowah Watershed: Effective 2018 Etowah: Post Preliminary Northern DeKalb County (PMR): Post-Preliminary Middle Savannah: Post-Preliminary Upper Savannah: Post-Preliminary Upper Oconee: Hydraulic Analysis Withlacoochee\Little: Hydrologic Analysis Lower Savannah: Early Study Phase Lower Flint: Early Study Phase Hiawassee: Discovery Upper Little Tennessee: Discovery Completed Pre-Risk MAP Counties (Map Mod.) Georgia Coastal: Effective 2014 (Riverine) & 2017/18 Upper Ocmulgee Watershed: Effective 2016/2017 Middle Chattahoochee-Lake Harding: Effective 2017 Apalachicola: Discovery Upper Suwanee: Discovery Apalachee Bay-St. Marks: Discovery

FY12 –FY18

POST MAP-MODERNIZATION RISK M.A.P. FUNDING FY09 – FY18 $37,572,088

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  • Base Level Engineering (BLE) is an approach that combines high

resolution ground elevation data and automated modeling technology advancements to create engineering models and flood hazard data typically at a large scale, like a watershed.

  • GAEPD proposes to undertake BLE studies on 11,150 stream miles in

47 watersheds (Subject to FEMA Approval and Funding).

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Base Level Engineering (BLE)

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Areas of Cooperation

  • GIS SERVICES
  • DFIRM Databases
  • Flood Risk Products
  • NFIP PARTICIPATION
  • Federal Disaster Relief
  • Manage Development in Special Flood Hazard Areas
  • Flood Insurance Available to Enhance Community Resilience
  • CRS PARTCIPATION
  • Mitigation Strategy
  • Reduction in Flood Insurance Premiums
  • FLOOD ORDINANCE REVISIONS
  • Resilience through Higher Regulatory Standards
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Thank You

Haydn Blaize, Manager, Floodplain Unit haydn.blaize@dnr.ga.gov (404) 463-4935