Alternative Management Strategies
for the New Jersey Coastline:
An Effort to Reduce Costs and
Use of Sand Resources
In the name of RSM….
ƒ State-sponsored RSM feasibility/planning
study
ƒ Manage NJ coastline and projects with a
holistic, system-based approach that considers
sediment-related problems within the context
of a regional strategy
ƒ Study specific purposes
– Reduce amount of sand needed to maintain NJ
beaches
– Reduce life-cycle costs
– Reduce environmental impacts
RSM is needed...
Because of a potential
sediment resource deficit
ƒ > 30 Million Cubic Yards of Sediment Required for
Initial Construction
ƒ 120 Million Cubic Yards of Sediment Required
over 50-yr Project Life
ƒ 130 Million Cubic Yards Presently Available in
Borrow Sites
ƒ Adjacent Shoreline/Area Impacts (Positive or
Negative)
ƒ Borrow Site Impacts
CENAP NJ Shore Protection Projects
Philadelphia
NJ
PA
Brigantine
Brigantine Inlet
Inlet to
to Great
Great
Egg
Egg Inlet
Inlet –– Brigantine
Brigantine Is.
Is.
(2007)
(2007)
MD
altimore
Great
Great Egg
Egg Harbor
Harbor
Inlet
Inlet and
and Peck
Peck Beach
Beach
(1992)
(1992)
Cape
Cape May
May City
City
(1991)
(1991)
Section
Section 227
227 –– Cape
Cape May
May Point
Point
(2001)
(2001)
DE
Manasquan
Manasquan Inlet
Inlet to
to
Barnegat
Barnegat Inlet
Inlet
Barnegat
Barnegat Inlet
Inlet to
to
Little
Little Egg
Egg Inlet
Inlet (LBI)
(LBI)
(2007)
(2007)
Brigantine
Brigantine Inlet
Inlet to
to Great
Great
Egg
Egg Inlet
Inlet –– Absecon
Absecon Is.
Is.
(2004)
(2004)
Great
Great Egg
Egg Inlet
Inlet to
to
Townsends
Townsends Inlet
Inlet
Townsends
Townsends Inlet
Inlet to
to
Cape
Cape May
May Inlet
Inlet
(2002)
(2002)
Hereford
Hereford Inlet
Inlet
to
to Cape
Cape May
May
Lower
Lower Cape
Cape May
May MeadowsMeadowsCape
Cape May
May Point
Point
(2004)
(2004)
Coast-length Regional Sediment Budget
Comprehensive coastal
GIS database and
coastal process data Inventory
Advanced sand source identification
Monitoring Program
Erosion Hotspot
ƒ North end of four barrier islands
ƒ Prominent prior to federal shore protection
program
ƒ Unable to identify numerical model to
adequately model this erosion
ƒ White paper
TOWNSENDS INLET
ABSECON INLET
and HEREFORD
INLET
GREAT EGG
HARBOR INLET
Mobile hydraulic dredge
backpassing
Wildwood, NJ.
Wildwood, NJ
April 2002
Approx. MHW
500 ft
“Pier”
~1/4 mile
Outfalls
Boardwalk
Backpassing Summary
Benefits
ƒ Development of new backpassing technology for use
at different localities
ƒ Provide high quality beach sand as alternative to
offshore borrow areas
ƒ Ample quantity (enough for 10+ nourishment cycles)
ƒ Reduce problems of excess sand at Wildwood
Impacts
ƒ Management of sand resources on a regional scale
could benefit Cape May as well as Wildwood
Status
ƒ Solicit bids for Backpassing Demo at Avalon
Inlet Management
MANASQUAN
INLET
Manasquan Inlet
Dredged Material Placement
BARNEGAT INLET
Barnegat Inlet Sediment Management Plan
CAPE MAY INLET
Cape May Inlet Updrift Accretion
Plover habitat construction
(2007)
RSM PROGRAM AT CAPE MAY, NJ
Cape May nourishment
combination
ƒ
ƒ
ƒ
2yr/4yr periodic nourishment cycles
Combine to 4 yrs
Combine mobe/demobe
Delaware Bay Coastline
Reeds Beach-Pierces Point &
Villas and Vicinity
Wildwood
Cape May National
Wildlife Refuge
U.S. Coast Guard
Cape May City
ay
eM
Cape May
Meadows
p
Ca
Cape May
Point
let
In
Cape May Point
Lower Cape May Meadows
Cape May City
Cape May Coastal
Projects
Project authorization
consolidation
Shore Protection Systems Initiative
To help Congress prioritize shore protection
budgeting
Show entire three state (NY, NJ, and DE) coastal
program
Show projected program budget for 5-years
Show shore condition of (and between) USACE projects
Show resources protected by shore protection
Estimate risk evolution over 5-years
Steps & Definitions
1. Compile NY, NJ and DE project data from
reports into excel spreadsheets
ƒ
type, phase, location, size, construction &
renourishment dates, volumes, cross-section,
initial & life cycle costs, etc.
2. 1st Cut Definition of “shore condition”
Red = Poor (eroded)
Yellow = Intermediate
Green = Good (robust)
(based on engineeing judgment/knowledge of latest surveys)
Steps & Definitions
3. 1st Cut Definition of Risk to Resources:
+++
++
+
Significant Resources Present
Moderate Resources Present
Minimal Resources Present
Six types of Resources Defined:
structures, environment/habitat, infrastructure,
critical facilities, evacuation routes, recreation
- View Color Legend
Red - Poor. Project is at or below the design profile.
Yellow - Intermediate. Project is late in the
renourishment cycle, or the project is performing
worse than expected, or both.
Green - Good. Project is early in the renourishment
cycle, or the project is performing better than
expected, or both.
Purple - Unconstructed. Project reliability is not
applicable for unconstructed projects.
For projects not yet constructed, the following will be
considered: beach width, beach elevation, dune
condition and erosion rates evaluated independently
on a red, yellow, green scale.
Summary
Management Strategies
ƒ
ƒ
ƒ
ƒ
ƒ
Erosion Hotspot Evaluation
Mobile Hydraulic Dredge Backpassing
Inlet Management
Cape May Beach Nourishment Projects
Shore Protection Systems and Project
Authorization Consolidation
Next Step
ƒ Continue development and recommend
strategies to HQUSACE in Feasibility
Report for Congressional appropriation
for continued engineering and design
March, 2002
April, 2004