Amelia Island Beach Management

AMELIA ISAND, FLORIDA
BEACH MANAGEMENT
PARTNERING AND PERSERVERENCE
Erik Olsen, PE
olsen associates, inc.
KEYNOTE PRESENTATION
FSBPA 2009
olsen
IN ORDER TO ADDRESS SHORE
PROTECTION TODAY
LOCAL INTERESTS PARTNER WITH:
• FDEP
• FPS
• BB&CS
• Nassau County
• US NAVY
• USACOE
Port Authority
• F.I.N.D.
olsen
“LOCAL INTERESTS”
ON AMELIA ISLAND
• City of Fernandina Beach (Sponsor)
• Nassau County
• South Amelia Island Shore
Stabilization Association Municipal
S
Service
i Benefit
B
fit Unit
U it (MSBU)
olsen
YOU ARE HERE
REGIONAL SETTING
olsen
Big & Little
Talbot
Island
State
Parks
(3,600 acres)
National
Seashore
Fort Clinch
Cli h
State Park
(1224 acres)
Amelia Island
State Park
(230 acres)
PUBLICLY OWNED LANDS
olsen
Fort Clinch ((1998))
CONSTRUCTED IN 19th CENTURY
olsen
FL
et al.
GA
LIMITS OF NASSAU COUNTY SHOREFRONT
olsen
FL
et al.
GA
FDEP DESIGNATED CRITICAL EROSION
olsen
Principal Sources of LongLong-Term
Erosion--Navigation Impacts
Erosion
• Stabilization of St.
St Mary
Mary’s
s
Entrance (1800’s)
• Stabilization of St. Johns
River
Ri
(1800’s)
(1800’ )
olsen
St.
St Mary’s
Mary s Entrance
• Work
W k began
b
in
i 1881
• N. Jetty (19,300 ft)
• S. Jetty (11,200 ft)
50+
MCY
olsen
Amelia Island
Nassau Sound
Little
Talbot
Island
1857
Location
St. Johns
St
J h
River
Entrance
olsen
Historical
Shorelines
2001 Photo
Amelia Island
State Park - 1984
olsen
Historical
Shorelines
Amelia
Island
Atlantic
Ocean
A.I.S.P.
Nassau
Sound
2001 Photo
olsen
Island-wide Pre
IslandPre--Nourishment Historical
Erosion Control Solutions Included:
• Groins (1900’s)
• Revetments (1965)
• Geotubes
• Dune
D e Re
Restoration
to tio
• Beach scraping (early 1970’s)
• Beach disposal
olsen
• Fernandina Beach
• American Beach
Revetments
constructed by
Federal Government
after Hurricane
Dora (1964)
olsen
olsen
Proactive Shore Stabilization Soln.
Soln 1
St. Mary’s
y Entrance
Strategic Beach
p
at
Disposal
N. Amelia Island
((1974 – Present))
olsen
St
St. Mary’s
Mary s Beach Disposal
• Source – Federal Navigation Channel
•
•
•
•
Maintenance
Initiated in 1978, mol
Has placed over 5 Mcy to date
Disposal authorized islandisland-wide:
onsho e and nearshore
onshore
nea sho e
Primary drivingdriving-force today is the
Kings Bay, GA Naval Submarine Base
olsen
Memorandum of
Understanding
(MOU)
•
U.S. Navy / USACOE
/ St
State
t off Florida
Fl id
•
Beach Disposal of all
compatible
tibl material
t i l
on Amelia Island
•
N cost to State
No
S
or
Local Gov’t
•
Facilitated
ili
d routinely
i l
since 1986
•
Further codified by
Inlet Mgt Plan
adopted in 1998
St. Mary’s Entrance
Trident Class
olsen
Proactive Partnering –
St. Mary’s Entrance
• Protects Ft. Clinch (first priority)
• Enhance
E h
F
Fernandina
di
B
Beach
h
Note: Island
Island--wide disposal is
authorized by both MOU and
Permit. Principal funding
source – U.S.
U S Navy
olsen
Amelia Island Proactive Shore
Stabilization Soln. 2
South Amelia
Island Beach
Restoration
Program
(No -Federal)
(Non(Non
Fede l)
olsen
olsen
olsen
olsen
olsen
The Plan to Save South Amelia Island
• SAISSA, Inc. – formed to address a
chronic erosion problem along the
South Island shoreline.
shoreline.
• Nassau County established the
SAISS--MSBU tto fund
SAISS
f d a project
j t
• 1994 – a 2.6Mcy, 18,000ft long beach
restoration project was constructed.
constructed.
• All ffunding
di
was llocal.
l
olsen
olsen
olsen
First Renourishment
In 2002, SAISSA and the Florida Park
Service partnered to include the AISP in
the first scheduled maintenance of the
beach restoration project and to
construct several stabilizing structures
beneficial to both the Park and the
renourishment project.
This allowed for some State cost sharing.
olsen
Damage to AISP Maritime Forest
High Tide
TUBE
High Tide
olsen
Amelia Island
State Park
olsen
South Amelia Island
Beach Restoration
• 1994 SAISSA Project:
j
1.76 Mm3
R-60 to RR-78 ((5,600
,
m))
Designed and permitted
in 18 months
• 2002 JOINT Project:
1 6 Mm3
1.6
R-60 to R
R--79.5
A.I.S.P.
2001 Photo
A.I.S.P. – Amelia Island State Park
olsen
Phase II Stabilization
To introduce structural stabilization in
order to reduce end losses from a
5 6 km (3.5
5.6
(3 5 miles) updrift beach
restoration project …
Nassau
Sound
Amelia Island
A.I.S.P.
Atlantic Ocean
Beach Fill – Phase I
(2002)
2001 Photo
olsen
Phase II Stabilization
… to recapture State Park acreage lost
to erosion …
Nassau
Sound
Amelia Island
A.I.S.P.
Atlantic Ocean
Beach Fill – Phase I
(2002)
2001 Photo
olsen
Project
j
Goal
…without adversely affecting
the balance of sediment transport
q
to maintain the downdrift inlet
required
facing shoreline of the state park.
Amelia
Island
Nassau
Sound
AISP
A.I.S.P.
Atlantic Ocean
Terminal
Structure?
2001 Photo
olsen
Phase II Stabilization Design Precepts
• Reduce end losses from the
beach fill project,
• Recapture eroded State
Park lands,,
• Protect endangered unique
maritime
iti
forest,
f
t and
d
• Re
Re--establish endangered
species habitat.
olsen
Regional Environmental
Protection Requirements*
Requirements*
•
No impact to downdrift
(inlet facing) shoreline
* By Permit
olsen
Atlantic
Ocean
Nassau
Sound
olsen
Regional Environmental
Protection Requirements*
Requirements*
•
No impact to downdrift
(inlet facing) shoreline,
shoreline
•
No impact
p
to Nassau Sound
sediment budget,
* By Permit
olsen
Regional Environmental
Protection Requirements*
Requirements*
•
No impact to downdrift
(inlet facing) shoreline,
shoreline
•
No impact to Nassau Sound
sediment budget,
•
No impact to Bird
Bi d Island Shoal
Complex.
* By Permit
olsen
Amelia
Island
Bird Island
Shoals
olsen
Alternative Solutions
A.) Beach fill alone – not acceptable,
acceptable,
B.) Radial Groin Field(s),
C.) Terminal structure(s),
D.) Breakwater(s),
olsen
Selected Plan
•
465 meter long “leaky”
terminal structure,
•
93 meter long detached
breakwater,
breakwater
•
Strategic
g updrift
p
placement of
p
advance beach fill to maximize
impoundment effects.
olsen
“Hinge Point”
Detached breakwater
Concept 6
A.I.S.P.
Leaky Terminal Structure
Nassau Sound
Atlantic Ocean
Little Talbot Island
2001
olsen
Concept Plan
(Pre--Beach Fill)
(Pre
Amelia Island
State Park
P
Potential
i l Acreage
A
to be Recaptured
Privately
Owned
Lands
2001 Photo
olsen
2,253,000
R-74
+10.0
+9.0
+6.0
AP-22
2 252 000
2,252,000
MHW (+3.2)
0.0
MLW (-2.1)
R-75
Atlantic Ocean
Predicted
Pl f
Planform
AP-23
2,251,000
R-76
South Amelia
Island
November 2002
Northing (ft, NAD2
27)
2,250,000
R-82
Salient at
Hinge Point
AP-25
R-77
R-77.5
10
R-81
2,249,000
Impounded
Sh
Shoreline
li
R-78
9
R-80
R-79.5
R-7
78.5
R-79
6
2,248,000
3.2
-2.1
6
3.2
-2.1
2,247,000
Spit
2,246,000
GRAPHIC SCALE
Nassau Sound
359,000
360,000
0
361,000
362,000
363,000
Easting (ft, NAD27)
364,000
500
1,000 FT
365,000
olsen
Anticipated
p
Shoreline Response
p
without Detached Breakwater
AISP
Anticipated
Shoreline
Response
Existing
Terminal
Groin
Detached
Breakwater
olsen
Anticipated Shoreline Response
without Detached Breakwater
& with Groin Extension
AISP
Existing
Terminal
Groin
750±
750
± ft
Anticipated
Shoreline
Response
1,600 FT
Detached
Breakwater
olsen
Sept. 2004
olsen
Evolving
Spit
Oct. 2004
Permeable
and Low
Low
Leaky
Terminal
Structure
olsen
*
Hinge
Point
Salient
Updrift detached
breakwater (93 m)
required to resolve
historical “hinge”
point in shoreline
configuration.
Low Tide Condition
olsen
COMPARISON
July 2005
olsen
Breakwater
“Leaky”
y
Groin
(buried)
HISTORICAL
SHORELINES
Spit
Formation
August 2006
olsen
Amelia Island Proactive Shore
Stabilization Soln. 3
Nassau County
Shore Protection Project
(Fernandina
(
Beach))
olsen
(National Seashore)
Shore
Protection
Project
Location
- State Park
olsen
Nassau County Shore
P t ti
Protection
Project
P j t
•
Federally
Authorized
•
Contractor –
Weeks Marine
•
Constructed
d–
July to Sept,
2008
•
1.7M cubic yards
•
$15 million; mol
olsen
City of Fernandina Beach
“The Poster
Poster--Child of Perserverence
Perserverence””
•
•
•
•
•
•
•
1946 – Beach
h Erosion
i
Board
d Study
d
1960 – Study by Sav
Sav.. District, C.O.E.
1973 – Recon Study by Jax C.O.E. *
1977 – Feasibility Study by Jax C.O.E.
(with Favorable Section 11-11 Findings)
1984 – Feasibility Study w/ E.I.S.
1999 – GRR (Revised 2004 & 2006)
2008 – Construction at 62 YEARS LATER!
* 9 years after Hurricane Dora (1964)
olsen
Cumberland
Island
St. Marys
Entrance
Amelia
Island
The Nassau County
Shore Protection
Project
j
is
i one off a
Relatively Small
Number of Projects
Nationally with a
Section 11-11
Component
olsen
olsen
Section 1
1--11 Mitigation
g
• First 50% of Project cost
@ 100% Federal
• Second 50% of Project
j
cost
@ 58% Federal
• Result – Total Federal Cost
Average is 79%
olsen
P j t
Project
completed
in early
Oct.
O t 2008
by Jacksonville
District, USACOEolsen
Amelia Island Proactive Shore
Stabilization Soln.
Soln 4
Strategic Beach Disposal
• North Amelia Island
St. Mary’s Entrance
Navigation Project
• South Amelia Island
Atlantic Intracoastal
Waterway (AIWW)
Sponsor – F.I.N.D.
olsen
AIWW
Dredging
Amelia
Island
AISP
A.I.S.P.
Atlantic
Ocean
Oceanfront
Beach
Di
Disposal
l
Site
Nassau
Sound
2001 Photo
olsen
THE END
As it could have been…
olsen
THE END
As it is…
olsen
Q
QUESTIONS?
olsen