Restoration experts from Ducks Unlimited, The Nature Conservancy, and the Lower Fox River/Green Bay Areas of Concern will discuss case studies of partnerships turning federal GLRI funding into successful on-the-ground habitat restoration projects that provide a variety of ecological and societal benefits that can be sustained well into the future. Featured case studies include successfully restoring coastal marsh for waterbirds and for northern pike, using watershed-based GIS planning tools to prioritize restoration projects, and the reestablishment of the Cat Island Chain of islands in lower Green Bay. This presentation was given by Janet Smith, Chair of the Biota and Habitat Work Group of the Science and Technical Advisory Committee for the Lower Fox River/Green Bay Area of Concern, Retired U.S. Fish and Wildlife Service.
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Restoring the West Shore of Green Bay
1. Cat Island Chain Restoration in
Lower Green Bay
Photo by Tom Erdman
1966
2. Southern Green Bay historically
provided diverse coastal wetland
habitats for fish and wildlife
n Expansive
emergent marshes
(e.g., Duck Creek delta)
n Numerous small islands
n Beaches and mud flats
n Submerged aquatic plant beds
Photo by
Tom Erdman 1966
5. Bass
Islands
Willow
Island
Cat
Island
Lone
Tree
Island
han
ga6on
C
Navi
nel
Grassy
Island
1966 during low water levels
Islands extend 2.5 miles into Green Bay
Photo Courtesy of Tom Erdman , 1966
6. Long
Tail
Point
Bass
Islands
Duck
Creek
Delta
Marsh
I-‐43
Construc6on
Cat
Island
Landfill
90% of Coastal Wetlands
Lost from Southern
Green Bay
Agriculture
Photo by WDNR, 1969
7. LiFle
Tail
Point
Long
Tail
Point
Peter’s
Marsh
Cat
Island
Chain
Duck
Creek
Delta
Rock
dikes
hardened
the
shoreline
Municipal
incinerator
and
landfill
Bayport
Dredge
Spoil
Disposal
in
Atkinson’s
Marsh
Photo Courtesy of Tom Erdman , 1970
8. Islands survived historical water level
fluctuations – Why not now?
Ø
Ø
Ø
Ø
Water levels rose rapidly to
record highs and remained
elevated for two decades
Repeated severe spring
storms
Shorelines hardened by rip
rap deflect wave energy
and exacerbate erosion
Poor water clarity from
runoff pollution reduced
aquatic vegetation and their
wave dampening benefits
9. Rising Great Lakes water levels and severe storms
in 1970s caused wetland and island erosion
10. Willow
Island
Cat
Island
Grassy
Island
Green Bay islands during
high water levels in 1976
Photo Courtesy of Tom Erdman , 1976
11. Lost habitat effects:
Ø Colonial
Nesting Water
Birds
Ø Shorebirds
Ø Waterfowl
Ø Fish Spawning
Ø Fish Nurseries
Ø Turtles
Ø Amphibians
Ø Invertebrates
14. Project Beginning
Ø
The Cat Island Chain
project developed out of the
1988 Lower Green Bay
Remedial Action Plan (RAP)
and was the top priority
project for habitat
restoration.
Members of the Citizens Advisory Committee and DNR staff
worked together to develop the Lower Green Bay Remedial
Action Plan. (Photo by Dave Crehore)
15. q RAP
Key Action: Protect remaining wetland
habitats and restore coastal habitats where
possible
q 1991 Risk Assessment identified habitat loss
as the greatest threat to long-term ecosystem
health of Green Bay
q 1994 Habitat Restoration Workshop identified
Cat Islands restoration as the top priority
q Runoff pollution also must be controlled
16. Goals
Ø Restore
Photo by WDNR 1969
diversity of
island and aquatic habitats
Ø Recreate 1960s island “footprint”
Ø Enhance spawning and nursery grounds for
various fish species (e.g. yellow perch,
musky, pike, walleye, sunfish)
17. Current Project
Ø
Today the project’s primary focus continues to be habitat restoration
and now has added the beneficial reuse of dredge material as a
means of accomplishing the project.
Ø
The project is a partnership between Brown County, WDNR, WDOT,
US Fish & Wildlife Service, US Army Corps of Engineers, USEPA,
UW-Sea Grant, UW-Green Bay, Port Operators and the Fox River
Group of paper mills
18.
19. Annual Dredging
Ø In
order to maintain
an active Port annual
maintenance
dredging is necessary
Ø Annual dredging of
100,000 to 250,000
cy of sediment that
has settled into the 14
mile long navigational
channel
20. Project Outcomes
Ø 30-50 years worth of disposal capacity
Ø Beneficial reuse of dredged material
Ø 2.5 mile wave barrier and re-establishment of 272 acres
of islands
Ø Wave barrier will protect 1,400 acres and provide critical
habitat for birds, fish and mammals
Ø Sustain jobs, industries and economic outputs of the Port
of Green Bay for NE Wisconsin