CRS AUDIT
A STUDY ON TYBEE ISLAND’S CRS AND OPEN SPACE PROGRAM
National Flood Insurance Program
Community Rating System
August 28, 2014
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
TYBEE ISLAND – CRS PROGRAM AUDIT
CATEGORIES OF FLOODPLAIN
MANAGEMENT ACTIVITIES:
• PUBLIC INFORMATION
• MAPPING AND REGULATIONS
• FLOOD DAMAGE REDUCTION
• WARNING AND RESPONSE
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)
1450 POINTS
50 POINTS
350 POINTS
50 POINTS
250 POINTS
600 POINTS
120 POINTS
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)
Credit specific to
properties
Credits local
regulations
Total Site
6 Acres
Total Site
6 Acres
Area in SFHA
3 Acres
Total Site
6 Acres
Area in SFHA
3 Acres
Impervious Area in
SFHA
0.75 Acres
OSP Eligible
2.25 Acres
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 = 100
Acreage of Open Space = 2.25
Ratio of Open Space = 0.0225
(2.25 / 100)
Open Space points for this Site = 32.6
(0.0225 x 1450)
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 = rOSP
rOSP * 1450 = Open Space Points
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 *
Buza Property
6.31
0.6
0.004
0.000
5.18
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
OPEN SPACE PRESERVATION
Total Site = 11.3 acres
OSP Eligible = 7.2 acres
DEED RESTRICTIONS (DR)
ADR / ASFHA = RDR
Deed Restrictions
50 Points
Beach
Dunes
Jaycee Park
Coastal Marshlands
Buza Property
Sallie Pearce
19th Street - Conservation
Buckley Property - Hwy 80
RDR * 50 = DEED RESTRICTION POINTS
aDR
rDR = (aDR/aSFHA)
DR = (rDR*50)
200.1
108.6
9.4
502.25
0.6
7.4
0.6
16.4
0.113
0.061
0.005
0.284
0.000
0.004
0.000
0.009
5.66
3.07
0.27
14.20
0.02
0.21
0.02
0.46
DR = 24
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
NATURAL FUNCTIONING OPEN SPACE (NFOS)
Natural Functioning Open Space
350 Points
ANFOS / ASFHA = RNFOS
RNFOS * 350 = NATURAL FUNCTIONING OPEN SPACE
POINTS
NFOS1 (170 Points)
aNFOS
rNFOS1 = (aNFOS1/aSFHA)
NFOS = (rNFOS1*170)
Beach
Dunes
Jaycee Park
Coastal Marshlands
Buza Property
Sallie Pearce
Buckley Property - Hwy 80
200.1
108.6
9.4
502.25
0.6
7.4
16.4
0.113
0.061
0.005
0.284
0.000
0.004
0.009
19.24
10.44
0.90
48.29
0.06
0.71
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
5.63
NFOS1
82 Points
ONGOING COASTAL INITIATIVES THAT BENEFIT
NFIP AND CRS PROGRAMS
National Flood Insurance Program
Community Rating System
August 28, 2014
COASTAL STORMWATER SUPPLEMENT (CSS)
CSS ELEMENTS
CRS ACTIVITY 450 STORMWATER
REGULATION (MAX 755)
• ORDINANCE
• GREEN INFRASTRUCTURE/LOW IMPACT
DEVELOPMENT FOCUS
• STORMWATER RUNOFF VOLUME/WQ
CONTROL
• DRAINAGE STRUCTURE MAINTENANCE
AGREEMENTS
• REQUIRED FOR NPDES MS4 COMMUNITIES
Stormwater management regulations
Size of development regulated
Managing stormwater volume
Public maintenance regulation
Low impact development
Watershed master plan
Erosion and sedimentation control
Water quality regulations
380
110
225
20
25
315
40
20
• WATER COURSE PROTECTION?
http://epd.georgia.gov/georgia-epd-coastal-stormwater-supplement-stormwater-management-manual
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
10- Step Process
Repetitive loss area analyses
Natural floodplain functions plan
www.CRSresources.org/500
382
140
100
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
290
State review bonus
60
Leverage for non-FEMA
cost sharing (multiplier) %
Higher study standards 160
Floodway standard
110
ONLINE MAPPING RESOURCES
CRS ACTIVITY POINTS AVAILABLE
ONLINE SERVICES
• THE GEORGIA COASTAL HAZARDS PORTAL
• HTTP://GCHP.SKIO.USG.EDU/
• US FISH AND WILDLIFE GEOSPATIAL
SERVICES
• HTTP://WWW.FWS.GOV/GIS/DATA/NAT
IONAL/
Activity 320 Map Information Service
1. Basic FIRM information
2. LiMWA/floodway info/CBRS area
3. Other flood problems not shown on FIRM
4. Flood depth data
5. Special flood-related hazards
6. Historical flood information
7. Natural floodplain functions
Activity 420 (Open Space Preservation)
Preserved open space
Deed restriction on OSP parcel
Natural functions open space
Natural shoreline protection
90
30
20
20
20
20
20
20
c420
OSP
DR
NFOS
NSP
2020
1450
50
350
120
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)
Channel debris removal
Problem site maintenance
Capital improvements program
Stream dumping regulations
Storage basin maintenance
570
200
50
70
30
120
OTHER INITIATIVES?
WHAT’S HAPPENING IN YOUR COMMUNITY?
QUESTIONS?
ED DITOMMASO, AICP GISP
COURTNEY REICH, AICP
(C) (912) 596-3407
ED@ECOLOGICALPLANNING.NET
(C) (912) 656-1316
COURTNEY@ECOLOGICALPLANNING.NET
Ecological Planning Group, LLC
7 East Congress Street, Suite 801
Savannah, GA 31401
www.ecologicalplanning.net