Shooting Island: A Multifaceted Approach to Coastal Wetland Restoration
Presented by Steven Bagnull 1
Shooting Island:
A Multifaceted Approach to
Coastal Wetland Restoration
Steven Bagnull, Ram Mohan, PhD, PE, and Travis Merritts, PE
January 30, 2020
Shooting Island: A Multifaceted Approach to Coastal Wetland Restoration
Presented by Steven Bagnull 2
Project Partners
National Fish and
Wildlife Foundation
(Grant Sponsor)
City of Ocean City Anchor QEA
(Design Engineer)
ACT Engineers
(Program Manager)
U.S. Army Corps of
Engineers
Regulatory/Review Agencies
NJDOT
Maritime Resources
New Jersey Dept. of
Environmental
Protection
Shooting Island: A Multifaceted Approach to Coastal Wetland Restoration
Presented by Steven Bagnull 3
• Hurricane Sandy Wetland Restoration Competitive
Grant Program (Phase 1 only)
• Project goals
– Enhance damaged wetlands to provide healthier marsh
habitats
– Restore marsh footprint loss due to erosion
– Mitigate future storm impacts
• Shooting Island identified through comprehensive
alternatives analysis
Project Overview
Shooting Island: A Multifaceted Approach to Coastal Wetland Restoration
Presented by Steven Bagnull 4
Great Egg Harbor Bay
Shooting Island: A Multifaceted Approach to Coastal Wetland Restoration
Presented by Steven Bagnull 5
Shooting Island Degradation
• Poorly draining, low-lying interior pannes
• High-energy wind wave environment resulting in erosion and shoreline loss
Shooting Island: A Multifaceted Approach to Coastal Wetland Restoration
Presented by Steven Bagnull 6
Shooting Island: A Multifaceted Approach to Coastal Wetland Restoration
Presented by Steven Bagnull 7
Design Approach
Shooting Island Restoration
Shooting Island: A Multifaceted Approach to Coastal Wetland Restoration
Presented by Steven Bagnull 8
• Phase 1: Living shoreline sill and concrete habitat
block shoreline enhancement
• Phase 2: Restoration fill placement and planting
behind living shoreline sill
• Phase 3: Thin layer placement in interior panne areas
Project Phase Overview
2019
• Phase 1 Completion
• Phases 2 and 3 – 60% Design
2020
• Phases 2 and 3 – 100% Design
• Phase 2 Construction Planned
2021+
• Phase 3 Construction
• Ongoing Monitoring
Shooting Island: A Multifaceted Approach to Coastal Wetland Restoration
Presented by Steven Bagnull 9
Phase 1 Design: Wave Modeling
2-Year NNE Wind Simulation
Living Shoreline Sill
Habitat Blocks
Shooting Island: A Multifaceted Approach to Coastal Wetland Restoration
Presented by Steven Bagnull 10
• 2,700 linear feet
• Sill elevation 2 feet
above MHW
• Fish windows set at
MLW
• Constructed along
1978 coastal
wetlands line
• Avoids tidal creek
areas
• Underlying geogrid
layer
• 1.5-foot-thick armor
layer over interior
core
Phase 1: Living Shoreline Sill Features
Shooting Island: A Multifaceted Approach to Coastal Wetland Restoration
Presented by Steven Bagnull 11
• 1,500 linear feet
• Concrete and
crushed shell habitat
blocks
• 50% of blocks
loaded with oyster
shell
• Placement within
intertidal range
• Breaks in alignment
for tidal exchange
• Preservation of
existing mudflats
and ecological uplift
Phase 1: Habitat Block Shoreline Features
Shooting Island: A Multifaceted Approach to Coastal Wetland Restoration
Presented by Steven Bagnull 12
Phase 1: Living Shoreline
Construction
Shooting Island Restoration
Shooting Island: A Multifaceted Approach to Coastal Wetland Restoration
Presented by Steven Bagnull 13
Shooting Island: A Multifaceted Approach to Coastal Wetland Restoration
Presented by Steven Bagnull 14
Shooting Island: A Multifaceted Approach to Coastal Wetland Restoration
Presented by Steven Bagnull 15
Shooting Island: A Multifaceted Approach to Coastal Wetland Restoration
Presented by Steven Bagnull 16
Lessons Learned
• Modeling as an optimization tool
• Cost-effective material selection and placement
• Sea level rise considerations
• Water-based habitat block deployment
Shooting Island: A Multifaceted Approach to Coastal Wetland Restoration
Presented by Steven Bagnull 17
Next Steps: Phases 2 and 3
Shooting Island: A Multifaceted Approach to Coastal Wetland Restoration
Presented by Steven Bagnull 18
• Closing of “fish windows”
• Beneficial use of dredged material
Phase 2: Restore Marsh Behind the Sill
Shooting Island: A Multifaceted Approach to Coastal Wetland Restoration
Presented by Steven Bagnull 19
Phase 3 – Thin Layer Placement
Shooting Island: A Multifaceted Approach to Coastal Wetland Restoration
Presented by Steven Bagnull 20
Project Approaches
• Optimize borrow source location and material types
• Utilize existing topography for material containment
and minimize installed controls (fencing and coir logs)
• Provide multiple placement options to maximize
production
• Design for MHW—adaptable for SLR
Shooting Island: A Multifaceted Approach to Coastal Wetland Restoration
Presented by Steven Bagnull 21
Questions/Discussion
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