U.S. ARMY CORPS OF ENGINEERS Ι Jacksonville District www.saj.usace.army.mil • 800-291-9405
FLAGLER COUNTY FLORIDA HURRICANE & STORM DAMAGE REDUCTION STUDY
ENVIRONMENTAL CONSIDERATION
DUNE HABITAT SHOREBIRDS SUBSTRATE RESOURCES
OTHER SPECIES OF CONCERNMONITORING SPECIES TO AVOID & MINIMIZE IMPACTS DURING CONSTRUCTION
PROCESS (NATIONAL ENVIRONMENTAL POLICY ACT (NEPA)NEPA is a federal law enacted in 1969. As required by NEPA, the Corps evaluates the potential environmental impacts to the human environment. The findings are explained in an Environmental Assessment (EA) and are available for public review and comment before any decisions are made or actions are taken. Findings compare the preferred alternative to the No-action alternative (Future without Project).
ENVIRONMENTAL ASSESSMENT IDENTIFIES SPECIES OF CONCERN & SENSITIVE HABITATS WITH CONSIDERATION OF PROTECTED SPECIES & CRITICAL HABITATSCoordination with applicable environmental regulatory agencies; avoid and minimize environmental impacts to the maximum extent practicable; monitor species during and after construction.
ENVIRONMENTAL ASSESSMENT SURVEYS & ANALYSIS• Biological survey of resources • Sea Turtle Nesting Data Analysis• Fish Data Analysis• Piping Plover and Shorebird Analysis• Right Whale Wintering Habitat Study• Nearshore and Borrow Area Sidescan Sonar Survey• Geo-technical Survey of Sand Resources
ENVIRONMENTAL CONSEQUENCES & BENEFITS• Dune rehabilitation will reestablish living shoreline• Establish high biodiversity for marine habitat • Serves as nesting habitat for sea turtles• Stabilize coastline by natural sand & dune vegetation • Promote biodiversity of native plant species• Provide aesthetic view to promote tourism
R-067
CULTURAL RESOURCES CONSIDERATION• Archeological surveys have been completed for shoreline environment only• The Corps is developing surveys for both the nearshore and borrow areas to determine the potential presence of any cultural resources• The Corps will develop survey procedures in conjunction with Flagler County and the Bureau of Energy Management (BOEM) for both nearshore and offshore borrow areas.
BORROW AREA2A, B AND C
R-101
R-004
R-010
R-020
R-040
R-050
R-030
R-060
R-067
HWY 101
I-95
Flagler County
R-080
R-094
PAINTERS HILL(R-050 TO R-060) 1.9 MILES
BEVERLY BEACH(R-060 TO R-067) 1.3 MILES
FLAGLER BEACH(R-067 TO R-101) 6.4 MILES
FLAGLERCOUNTY
MARINELAND(R-001 TO R-004) 1.9 MILES
R-101R-101
R-004R-004
R-050R-050R-050R-050
R-060R-060
R-067R-067
R-010R-010
R-020R-020
R-030R-030
R-040R-040
HWY 101HWY 101
I-95I-95
Flagler CountyFlagler CountyFlagler CountyFlagler County
R-080R-080
R-094R-094
PAINTERS HILLPAINTERS HILLPAINTERS HILLPAINTERS HILL(R-050 TO R-060) (R-050 TO R-060) 1.9 MILES1.9 MILES
BEVERLY BEACHBEVERLY BEACHBEVERLY BEACHBEVERLY BEACH(R-060 TO R-067) (R-060 TO R-067) 1.3 MILES1.3 MILES
FLAGLER BEACHFLAGLER BEACHFLAGLER BEACHFLAGLER BEACH(R-067 TO R-101) (R-067 TO R-101) (R-067 TO R-101)
MARINELANDMARINELANDMARINELANDMARINELAND(R-001 TO R-004) (R-001 TO R-004) 1.9 MILES
ATLANTIC INTRAC
OASTAL W
ATERWAY
ATLANTIC INTRAC
OASTAL W
ATERWAY
Volusia County
SEA TURTLES
Problem Dune
Happy Dune
Tentatively Selected Plan (TSP) (R-080 to R-094)
U.S. ARMY CORPS OF ENGINEERS Ι Jacksonville District www.saj.usace.army.mil • 800-291-9405
FLAGLER COUNTY FLORIDA HURRICANE & STORM DAMAGE REDUCTION STUDY
STUDY OVERVIEW
MARINELAND.6 MILES
PAINTERS HILL1.9 MILES
BEVERLY BEACH1.3 MILES
Guana State Park
R-001
R-001
R-050
R-060
R-050R-050 R-060
R-067
R-060R-060
R-101
R-004
R-010
R-020
R-040
R-050
R-030
R-060
R-067
HWY 101
I-95
Flagler County
R-080
R-094
PAINTERS HILL(R-050 TO R-060) 1.9 MILES
BEVERLY BEACH(R-060 TO R-067) 1.3 MILES
FLAGLER BEACH(R-067 TO R-101) 6.4 MILES
FLAGLERCOUNTY
MARINELAND(R-001 TO R-004) 1.9 MILES
R-004R-004
R-050R-050R-050R-050
R-060R-060
R-067R-067
R-010R-010
R-020R-020
R-030R-030
R-040R-040
R-101R-101
HWY 101HWY 101
I-95I-95
Flagler CountyFlagler CountyFlagler CountyFlagler County
R-080R-080
R-094R-094
PAINTERS HILLPAINTERS HILLPAINTERS HILLPAINTERS HILL(R-050 TO R-060) (R-050 TO R-060) 1.9 MILES1.9 MILES
BEVERLY BEACHBEVERLY BEACHBEVERLY BEACHBEVERLY BEACH(R-060 TO R-067) (R-060 TO R-067) 1.3 MILES1.3 MILES
FLAGLER BEACHFLAGLER BEACHFLAGLER BEACHFLAGLER BEACH(R-067 TO R-101) (R-067 TO R-101) (R-067 TO R-101)
MARINELANDMARINELANDMARINELANDMARINELAND(R-001 TO R-004) (R-001 TO R-004) 1.9 MILES
ATLANTIC INTRAC
OASTAL W
ATERWAY
ATLANTIC INTRAC
OASTAL W
ATERWAY
Volusia County
R-080R-080
Tentatively Selected Plan (TSP) (R-080 to R-094)
FLAGLER COUNTYHURRICANE AND STORM DAMAGE REDUCTION FEASIBILITY STUDY AND ENVIRONMENTAL IMPACT STATEMENTGOALReduce damages caused by erosion and coastal storms to coastal infrastructure along the Flagler County shoreline.
OBJECTIVES• Reduce storm damages to coastal infrastructure • Maintain opportunities for recreational use of beach
and nearshore areas• Maintain environmental quality and integrity• Maintain a safe hurricane evacuation route
PUBLIC PARTICIPATIONThe Jacksonville District invites the public to review and comment on the Draft Integrated Feasibility Study and Environmental Assessment.
PARTICIPATE TODAYPlease provide your comments on the Flagler County Hurricane and Storm Damage Reduc-tion Study. The Draft Study and Environmental Assessment are available online at http://1.usa.gov/1fCScyH.
Comments may be submitted:
1. Using a comment sheet provided here today
2. Electronically entering them at: FlaglerHSDR.Comments @usace.army.mil
3. Writing and mailing them to: U.S. Army Corps of Engineers Jacksonville District P.O. Box 4970 Jacksonville, FL 32232-0019 attn: Kathleen McConnell
CORPS CIVIL WORKSPROCESS & STUDY TIMELINE
Problem IdentificationMAY 2002: The authority for conducting the study is contained in House Resolution 2676
Reconnaissance StudyMAR 2004: Reconnaissance Report indicates Federal interest in conducting a Feasibility Study
Feasibility Study(with integrated NEPA)
SEPT 2004: Feasibility Cost Sharing Agreement (FCSA) executed2008: Feasibility Study initiated and scoping letter sent to local residents and agencies2014: Feasibility Study completed and approved
Project Authorizationand Appropriations
*2016: Project Authorized by Congress in a Water Resources Development Act (WRDA) Bill*2016: Appropriations Granted in an Energy & Water Development Bill
Project Construction*2017: Initial Project Construction
*Subject to Future Federal Funding
Six Step PlanningProcess• Specify Problems and
Opportunities• Inventory and Forecast
Conditions• Formulate Alternative Plans• Evaluate Effects of
Alternative Plans• Compare Alternative Plans• Select Recommended Plan
R-067
R-101
EXISTINGREVETMENT
FLAGLER BEACH6.4 MILES
U.S. ARMY CORPS OF ENGINEERS Ι Jacksonville District www.saj.usace.army.mil • 800-291-9405
FLAGLER COUNTY FLORIDA HURRICANE & STORM DAMAGE REDUCTION STUDY
ECONOMIC CONSIDERATION
R-101
R-004
R-010
R-020
R-040
R-050
R-030
R-060
R-067
HWY 101
i-95
Flagler County
R-080
R-094
PAINTERS HILL(R-050 TO R-060) 1.9 MILES
BEVERLY BEACH(R-060 TO R-067) 1.3 MILES
FLAGLER BEACH(R-067 TO R-101) 6.4 MILES
FLAGLERCOUNTY
MARINELAND(R-001 TO R-004) 1.9 MILES
R-004R-004
R-050R-050R-050R-050
R-060R-060
R-067R-067
R-010R-010
R-020R-020
R-030R-030
R-040R-040
R-101R-101
HWY 101HWY 101
i-95i-95
Flagler CountyFlagler CountyFlagler CountyFlagler CountyFlagler CountyFlagler County
R-080R-080
R-094R-094
PAINTERS HILLPAINTERS HILLPAINTERS HILLPAINTERS HILL(R-050 TO R-060) (R-050 TO R-060) 1.9 MILES1.9 MILES
BEVERLY BEACHBEVERLY BEACHBEVERLY BEACHBEVERLY BEACH(R-060 TO R-067) (R-060 TO R-067) 1.3 MILES1.3 MILES
FLAGLER BEACHFLAGLER BEACHFLAGLER BEACHFLAGLER BEACH(R-067 TO R-101) (R-067 TO R-101) (R-067 TO R-101)
MARINELANDMARINELANDMARINELANDMARINELAND(R-001 TO R-004) (R-001 TO R-004) 1.9 MILES
ATLANTIC INTRAC
OASTAL W
ATERWAY
ATLANTIC INTRAC
OASTAL W
ATERWAY
Volusia County
R-080R-080
Tentatively Selected Plan (TSP) (R-080 to R-094)
Most damages are maintenance
on revetment and road in
Reach-C
Reach-A has inadequate
public access
Federal project could not
economically be justi�ed for
Reaches-B & D
Dune nourishment in Reach-C meets study objectives and most
reasonably maximizes national economic
development
EconomicSummary in
Average AnnualDollars
Price Level
Discount Rate
Storm DamageReduction Bene�ts
Recreation Bene�ts
Total Bene�ts
Cost
Net Bene�ts
Bene�t Cost Ratio
Summary
FY14
3.5%
$1,971,000
$72,000
$2,043,000
$1,119,000
$924,000
1.83
PLAN PERFORMANCE
ALTERNATIVE EVALUATIONFUTURE WITHOUT PROJECT CONDITION
HURRICANE & STORM DAMAGE REDUCTION ECONOMIC ANALYSIS
FEDERAL OBJECTIVEReasonably maximize net national economic de-velopment
STUDY OBJECTIVEDevelop plan to reduce risk of hurricane & storm damages
REASON FOR ECONOMIC ANALYSISMeasure value of accomplishing study objective relative to the cost to determine federal interest
REACH-A REACH-B REACH-C REACH-DMostly
residential structures seaward of
A1A
Low erosion rates
Development landward of
A1A
FDOT revetment/
Seawall High erosion rates Development landward of
A1A
Gamble Rogers Park
Some Development landward of
A1A
DECISION CRITERIABene�ts/Cost > 1
• National Economic Development Plan = Plan that most reasonably maximizes Net National Economic Development Bene�ts
Bene�ts• Storm Damage Reduction• Recreation
Cost• Initial Construction• Periodic Renourishment• Maintenance• Mitigation & Monitoring
ANALYTICAL METHODS
REACH-A
REACH-B
REACH-C
REACH-D
U.S. ARMY CORPS OF ENGINEERS Ι Jacksonville District www.saj.usace.army.mil • 800-291-9405
FLAGLER COUNTY FLORIDA HURRICANE & STORM DAMAGE REDUCTION STUDY
ENGINEERING CONSIDERATION
Pre-Project
R-101
R-004
R-010
R-020
R-040
R-050
R-030
R-060
R-067
HWY 101
i-95
Flagler County
R-080
R-094
PAINTERS HILL(R-050 TO R-060) 1.9 MILES
BEVERLY BEACH(R-060 TO R-067) 1.3 MILES
FLAGLER BEACH(R-067 TO R-101) 6.4 MILES
FLAGLERCOUNTY
MARINELAND(R-001 TO R-004) 1.9 MILES
R-004R-004
R-050R-050R-050R-050
R-060R-060
R-067R-067
R-010R-010
R-020R-020
R-030R-030
R-040R-040
R-101R-101
HWY 101HWY 101
i-95i-95
Flagler CountyFlagler CountyFlagler CountyFlagler County
R-080R-080
R-094R-094
PAINTERS HILLPAINTERS HILLPAINTERS HILLPAINTERS HILL(R-050 TO R-060) (R-050 TO R-060) 1.9 MILES1.9 MILES
BEVERLY BEACHBEVERLY BEACHBEVERLY BEACHBEVERLY BEACH(R-060 TO R-067) (R-060 TO R-067) 1.3 MILES1.3 MILES
FLAGLER BEACHFLAGLER BEACHFLAGLER BEACHFLAGLER BEACH(R-067 TO R-101) (R-067 TO R-101) (R-067 TO R-101)
MARINELANDMARINELANDMARINELANDMARINELAND(R-001 TO R-004) (R-001 TO R-004) 1.9 MILES
ATLANTIC INTRAC
OASTAL W
ATERWAY
ATLANTIC INTRAC
OASTAL W
ATERWAY
Volusia County
R-080R-080
Tentatively Selected Plan (TSP) (R-080 to R-094)
FLAGLER COUNTY PHYSICAL CONDITIONS• Net littoral transport from north to south• Dominant winds from the northeast• Mean monthly wave heights range from 2.26 feet in July to 4.49 feet in November• Mean ocean tidal range of 4.2 feet• Historic sea level rise estimated at 0.0079 feet/year• On average the bluff (dune) is about 10 feet higher than the beach berm
Name
Description
Shoreline Length
# of Anticipated Nourishment Events
Average Nourishment Interval
FDEP Monuments
Average Volume of each nourishment event (cubic yards)
Total Volume over life of project (cubic yards)
Reach CduneH
10-foot seaward extension of the existing dune and beach pro�le in Reach-C
2.6 miles
5
11 years
R80 - R94
320,000
1,600,000
R-067
R-101
EXISTINGREVETMENT
FLAGLER BEACH6.4 MILES
Post-Project
Conc
eptu
al R
ende
ring
TYPICAL PROFILE FOR TSP - REACH C, DUNE H
DISTANCE FROM R-MONUMENT (FT)
ELEV
ATIO
N (F
T-N
AVD
88)
25
20
15
10
5
0
-5100 125 150 175 200 225 250 275 300 325 350 375 400
Base
line
To Depth of Closure
Measured ExistingExisting (Idealized)Construction Template10 Ft Dune Extension
FLORIDA BEACHES GEOLOGY
TYPICAL BEACH PROFILE
MODERN COASTAL DEVELOPMENT
SEDIMENT TRANSPORT IN THE COASTAL ZONE
SEA LEVELGEORGIAALABAMA
FLORIDA
INTERGLACIAL SHORELINE
(150 feet above present sea level)
GLACIAL SHORELINE
(300 feet below present sea level)
• About 13,000 years ago the Florida coastline was much farther seaward.
• Even at that time people were drawn to the beaches. The coastline was a great place to live for the same reasons it is today.
• As glaciers melted, sea level rose and about 5,000 years ago the shoreline reached a shape similar to what it is today.
• The paleo-indian infrastructure was highly mobile. As the coastline moved landward, they could likely relocate with relative ease.
Coastal beaches function as a system. The beach not only includes the dunes and berm, or the dry part of the beach, but also the wet part of the beach that slopes underwater.
Decades of beachfront development has interrupted the natural and necessary movement of sediment and interferred with coastal processes at our nation’s beaches. Because people highly value the economic, recreational and environmental resources on the coasts, there is public interest in protecting our nation’s beaches.
Hurricane and Storm Damage Reduction projects can help safeguard the public’s investment in our nation’s coasts.
• Rates of relative local mean sea level observed at long term tide stations (minimum of 30 years of data) around Florida indicate that sea level is rising between 0-3 mm/year or 0-1 feet per century. (Source: NOAA)
• Recent climate research by the Intergovernmental Panel on Climate Change (IPCC) predicts continued or accelerated global warming for the 21st Century and possibly beyond, which will cause a continued or accelerated rise in global mean sea-level.
The coastal zone – where land, sea and sky all interact – is a complex system of sediment movement that ultimately defines the morphology, or shape of a natural coastline. Captive to the forces of wind, waves and currents, sediment within the coastal system is forever moving. As sediment is transported throughout the system by natural forces, the coastline both erodes as sand is transported away from the beach and accretes as sand is deposited onto the beach. The process of sediment moving perpendicular to the shorelineis called cross-shore transport. Long-shore sediment transport describes sediment movement parallel to the coastline. At inlets, tidal currents can transport sediment along with other forces to create shoals. Sand deposited on the inside of the inlet creates flood shoals, and sand deposited seaward of the inlet creates ebb shoals. Aeolean transport (wind-driven) moves sand from or to dunes and dry beaches. During storms the forces that drive sediment movement intensify and changes to the natural system can be greater.
LAND AREA (about 150 feet elevation)
PENSACOLA (2.10 mm/year)
APALACHICOLA (1.38 mm/year)
PANAMA CITY (0.75 mm/year)
CEDAR KEY (1.80 mm/year)
ST. PETERSBURG(2.36 mm/year)
CLEARWATER BEACH(2.43 mm/year)
FORT MYERS(2.4 0 mm/year)
NAPLES(2.02 mm/year)
KEY WEST(2.02 mm/year) VACA KEY
(2.78 mm/year)
MIAMI BEACH(2.39 mm/year)
DAYTONA BEACH(2.32 mm/year)
FERNANDINA BEACH(2.02 mm/year)
MAYPORT(2.40 mm/year)
FLORIDA
(2.10 mm/year)
APALACHICOLAAPALACHICOLA(1.38 mm/year)
PANAMA CITY(0.75 mm/year)(0.75 mm/year)
CEDAR KEYCEDAR KEY(1.80 mm/year)
ST. PETERSBURG(2.36 mm/year)
CLEARWATER BEACH(2.43 mm/year)
FORT MYERS(2.4 0 mm/year)
NAPLESNAPLES(2.02 mm/year)
KEY WEST(2.02 mm/year) VACA KEY
(2.78 mm/year)
MIAMI BEACH
DAYTONA BEACH(2.32 mm/year)
(2.02 mm/year)
MAYPORT(2.40 mm/year)
MODERN COASTAL DEVELOPMENTDecades of beachfront development has interrupted the natural aDecades of beachfront development has interrupted the natural amovement of sediment and interferred with coastal processes at Because people highly value the economic, recreational and envion the coasts, there is public interest in protecting our natio
Hurricane and Storm Damage Reduction projects can help safeguarinvestment in our nation’s coasts.
COASTAL AREA
BEACH OR SHORE
BACKSHORE OR BERM FORESHORE
CO
AST
LINE
HIGH WATER LEVEL
LOW WATER LEVEL
BOTTOM
DUNE
INLAND
OFFSHORE
HIGH WATER LEVEL
LOW WATER LEVEL
BEACH OR SHOREINLAND
FORESHOREBACKSHORE OR BERM
Inland Waterway
Mainland
Inland Waterway
Barrier Island
Ebb EbbShoal
FloodFloodShoal
Mainland
LongshoreSedimentTransport
Barrier Island Breaching
Barrier Island
Sandbar
Cross-shoreSedimentTransport
Dune System
Winds, Waves and
Ocean Currents
U.S. ARMY CORPS OF ENGINEERS | Jacksonville District www. saj.usace.army.mil • 800-291-9405
FLORIDA BEACH BASICS