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CRS AUDIT
A STUDY ON TYBEE ISLAND’S CRS AND OPEN SPACE PROGRAM
National Flood Insurance Program Community Rating SystemAugust 28, 2014
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BACKGROUND
• CRS RECERTIFICATION & CYCLE VISIT APRIL 2014
• NEW CRS MANUAL 2013
• CHANGES TO ACTIVITIES / CREDITS
• BIGGERT WATERS ACT/HOMEOWNER FLOOD INSURANCE AFFORDABILITY ACT OF 2014
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TYBEE ISLAND – CRS PROGRAM AUDIT
CATEGORIES OF FLOODPLAIN MANAGEMENT ACTIVITIES:
• PUBLIC INFORMATION
• MAPPING AND REGULATIONS
• FLOOD DAMAGE REDUCTION
• WARNING AND RESPONSE
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OPEN SPACE PRESERVATION
1450 POINTS
50 POINTS
350 POINTS
50 POINTS
250 POINTS
600 POINTS
120 POINTS
• Open Space Preservation (OSP)• Deed Restrictions (DR)• Natural Functions Open Space (NFSP)• Special Flood-Related Hazard Open
Space (SHOS)• Open Space Incentives (OSI)• Low-Density Zoning (LZ)• Natural Shoreline Protection (NSP)
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OPEN SPACE PRESERVATION
• Open Space Preservation (OSP)• Deed Restrictions (DR)• Natural Functions Open Space (NFSP)• Special Flood-Related Hazard Open Space
(SHOS)
• Open Space Incentives (OSI)• Low-Density Zoning (LZ)• Natural Shoreline Protection (NSP)
Credits local regulations
Credit specific to properties
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Total Site6 Acres
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Total Site6 Acres
Area in SFHA3 Acres
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Total Site
6 Acres
Area in SFHA
3 Acres
Impervious Area in SFHA
0.75 Acres
OSP Eligible
2.25 Acres
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Total Site
6 Acres
Area in SFHA
3 Acres
Impervious Area in SFHA
0.75 Acres
OSP Eligible
2.25 Acres
Total acreage in SFHA = 100Acreage of Open Space = 2.25Ratio of Open Space = 0.0225
(2.25 / 100)Open Space points for this Site =
32.6 (0.0225 x 1450)
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OPEN SPACE PRESERVATION• TOTAL ACREAGE OF THE CITY
• 2,046 ACRES
• TOTAL ACREAGE OF SPECIAL FLOOD HAZARD AREA
• 1,768 (86% OF CITY)
• AE ZONE, 1,200 ACRES (59%)
• VE ZONE, 568 ACRES (28%)
• Beach• Dunes• Parks• Coastal Marshlands• Conservation
Easements• Other
aOSP / aSFHA = rOSPrOSP * 1450 = Open Space
Points
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OPEN SPACE PRESERVATION (OSP)
aOSP rOSP = (OSP / aSFHA)
OSP Points (rOSP*1450)
Beach 200.1 0.113 164.11
Dunes 108.6 0.061 89.07
Memorial Park 7.2 0.004 5.90
Jaycee Park 9.4 0.005 7.71
Tybee Lighthouse * 6 0.003 4.92
Coastal Marshlands 502.25 0.284 411.92
4-H Center * 6.31 0.004 5.18Buza Property 0.6 0.000 0.49
Sallie Pearce 7.4 0.004 6.07
19th Street - Conservation 0.6 0.000 0.49
Buckley Property - Hwy 80 16.4 0.009 13.45
OSP = 710
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OPEN SPACE PRESERVATION
Total Site = 11.3 acres
OSP Eligible = 7.2 acres
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DEED RESTRICTIONS (DR)ADR / ASFHA = RDR
RDR * 50 = DEED RESTRICTION POINTS
aDR rDR = (aDR/aSFHA) DR = (rDR*50)
Beach 200.1 0.113 5.66Dunes 108.6 0.061 3.07
Jaycee Park 9.4 0.005 0.27
Coastal Marshlands 502.25 0.284 14.20
Buza Property 0.6 0.000 0.02
Sallie Pearce 7.4 0.004 0.2119th Street - Conservation 0.6 0.000 0.02Buckley Property - Hwy
80 16.4 0.009 0.46
Deed Restrictions50 Points
DR = 24
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COASTAL MARSHLANDS PROTECTION ACT
• GENERAL ASSEMBLY DECLARES THAT COASTAL MARSHLANDS OF GA ARE A VITAL NATURAL RESOURCE SYSTEM
• MARSHLANDS PROVIDE THE FOLLOWING
• HABITAT
• NUTRIENTS
• BUFFERS AGAINST FLOODING AND EROSION
• DISSEMINATE POLLUTANTS
• NATURAL RECREATIONAL RESOURCE
• ECONOMIC RESOURCE
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NATURAL FUNCTIONING OPEN SPACE (NFOS)
ANFOS / ASFHA = RNFOS
RNFOS * 350 = NATURAL FUNCTIONING OPEN SPACE POINTS
Natural Functioning Open Space350 Points
NFOS1 (170 Points) aNFOS rNFOS1 = (aNFOS1/aSFHA) NFOS = (rNFOS1*170)
Beach 200.1 0.113 19.24Dunes 108.6 0.061 10.44
Jaycee Park 9.4 0.005 0.90Coastal Marshlands 502.25 0.284 48.29
Buza Property 0.6 0.000 0.06Sallie Pearce 7.4 0.004 0.71
Buckley Property - Hwy 80 16.4 0.009 1.58
NFOS 3 (50 Points) aNFOS3 rNFOS3 = (aNFOS3/aSFHA) NFOS3 = (rNFOS3*50)
Critical habitit for piping plover (portion of the beach)
199 0.113 5.63NFOS1
82 Points
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ONGOING COASTAL INITIATIVES THAT BENEFIT NFIP AND CRS PROGRAMS
National Flood Insurance Program Community Rating SystemAugust 28, 2014
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COASTAL STORMWATER SUPPLEMENT (CSS)
CSS ELEMENTS
• ORDINANCE
• GREEN INFRASTRUCTURE/LOW IMPACT DEVELOPMENT FOCUS
• STORMWATER RUNOFF VOLUME/WQ CONTROL
• DRAINAGE STRUCTURE MAINTENANCE AGREEMENTS
• REQUIRED FOR NPDES MS4 COMMUNITIES
• WATER COURSE PROTECTION?
CRS ACTIVITY 450 STORMWATER REGULATION (MAX 755)
Stormwater management regulations 380Size of development regulated 110Managing stormwater volume 225Public maintenance regulation 20Low impact development 25Watershed master plan 315Erosion and sedimentation control 40Water quality regulations 20
http://epd.georgia.gov/georgia-epd-coastal-stormwater-supplement-stormwater-management-manual
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COUNTY HAZARD MITIGATION PLANNING
COASTAL PLANNING INITIATIVES
• COASTAL HAZARD PLANS DUE FOR AN UPDATE 2014 – 2016.
• GEORGIA COASTAL HAZARDS COMMUNITY OF PRACTICE
• CHATHAM COUNTY NATURAL RESOURCES PROTECTION COMMISSION
• CRC COASTAL HAZARD MITIGATION PLAN
ACTIVITY 510 - FLOODPLAIN MANAGEMENT
Floodplain management plan 382
10- Step ProcessRepetitive loss area analyses 140Natural floodplain functions plan 100www.CRSresources.org/500
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COASTAL FLOOD MAP PROJECT
• INLAND PHASE COMPLETED
• COASTAL PHASE IN PROGRESS, TO BE COMPLETED 2015/2106
• PARTNERS: FEMA, GA DNR, NOAA, CRC, LOCAL GOVERNMENT
• LOCAL CONTRIBUTIONS OF RESOURCES/LOCAL STUDIES
ACTIVITY 410 FLOODPLAIN MAPPING
New study 290State review bonus 60Leverage for non-FEMA cost sharing (multiplier) %Higher study standards 160Floodway standard 110
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ONLINE MAPPING RESOURCES
ONLINE SERVICES• THE GEORGIA COASTAL HAZARDS
PORTAL
• HTTP://GCHP.SKIO.USG.EDU/
• US FISH AND WILDLIFE GEOSPATIAL SERVICES
• HTTP://WWW.FWS.GOV/GIS/DATA/NATIONAL/
CRS ACTIVITY POINTS AVAILABLE
Activity 420 (Open Space Preservation) c420
2020
Preserved open space OSP145
0Deed restriction on OSP parcel DR 50Natural functions open space NFOS 350Natural shoreline protection NSP 120
Activity 320 Map Information Service 901. Basic FIRM information 302. LiMWA/floodway info/CBRS area 203. Other flood problems not shown on FIRM 204. Flood depth data 205. Special flood-related hazards 206. Historical flood information 207. Natural floodplain functions 20
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DRAINAGE SYSTEM OPERATION & MAINTENANCE
COASTAL/STATEWIDE PROGRAMS
• SPECIAL OPTION LOCAL SALES TAX
• NPDES PERMITS
• MS4 PHASE I & II
• WATERSHED PROTECTION PLANS
CRS ACTIVITIES
Activity 540 (Drainage System Maintenance) 570Channel debris removal 200Problem site maintenance 50Capital improvements program 70Stream dumping regulations 30Storage basin maintenance 120
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OTHER INITIATIVES?WHAT’S HAPPENING IN YOUR COMMUNITY?
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QUESTIONS?
ED DITOMMASO, AICP GISP(C) (912) [email protected]
COURTNEY REICH, AICP(C) (912) [email protected]
Ecological Planning Group, LLC7 East Congress Street, Suite 801Savannah, GA 31401www.ecologicalplanning.net