FLAGLER COUNTY FLORIDA HURRICANE & STORM … Protection/Flagler... · • Sea Turtle Nesting Data...

5
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 CONCERN MONITORING 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 HABITATS Coordination 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 AREA 2A, 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 FLAGLER COUNTY MARINELAND (R-001 TO R-004) 1.9 MILES ATLANTIC INTRACOASTAL WATERWAY ATLANTIC INTRACOASTAL WATERWAY Volusia County SEA TURTLES Problem Dune Happy Dune Tentatively Selected Plan (TSP) (R-080 to R-094)

Transcript of FLAGLER COUNTY FLORIDA HURRICANE & STORM … Protection/Flagler... · • Sea Turtle Nesting Data...

Page 1: FLAGLER COUNTY FLORIDA HURRICANE & STORM … Protection/Flagler... · • Sea Turtle Nesting Data Analysis ... • Serves as nesting habitat for sea turtles ... CLEARWATER BEACH (2.43

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)

Page 2: FLAGLER COUNTY FLORIDA HURRICANE & STORM … Protection/Flagler... · • Sea Turtle Nesting Data Analysis ... • Serves as nesting habitat for sea turtles ... CLEARWATER BEACH (2.43

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

Page 3: FLAGLER COUNTY FLORIDA HURRICANE & STORM … Protection/Flagler... · • Sea Turtle Nesting Data Analysis ... • Serves as nesting habitat for sea turtles ... CLEARWATER BEACH (2.43

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

Page 4: FLAGLER COUNTY FLORIDA HURRICANE & STORM … Protection/Flagler... · • Sea Turtle Nesting Data Analysis ... • Serves as nesting habitat for sea turtles ... CLEARWATER BEACH (2.43

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

Page 5: FLAGLER COUNTY FLORIDA HURRICANE & STORM … Protection/Flagler... · • Sea Turtle Nesting Data Analysis ... • Serves as nesting habitat for sea turtles ... CLEARWATER BEACH (2.43

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