The Center Point Bay Marina site is a privately owned peninsula located on the south shore of Muskegon Lake. The site was historically constructed of a combination of foundry fill, concrete, slag, and miscellaneous debris.
The site was restored by removing the concrete debris and slag from around the shorelines, as well as some of the foundry fill. A combination of stone and bioengineering was placed along the shoreline. Selective gaps were created in the stone to allow for wildlife passage across the land-water interface. Following construction, native seed and shrubs were installed along the shoreline. In 2013, an osprey nesting platform was added to create additional habitat at the site.
Year Restored: 2011/2013
Area Restored (by habitat type):
Shoreline softening=1,314 linear feet
Emergent Wetland=1.31 acres
Upland Buffer=1.00 acres
Construction Facts:
$271,530 construction cost
3,034 cubic yards of foundry fill removed
272 tons of slag and metal debris removed
2,200 native shrubs installed
1,920 linear feet of bioengineering installed
65 native species installed
Construction
Post-Restoration
2019 Site Monitoring Summary
Site Summary Statistics
2019 Native Mean Coefficient of Conservatism: 3.5
2019 Floristic Quality Index (FQI): 18.3
2019 Total Native Species: 33
2019 Percent Invasive Species Cover: <5%
Invasive species present:
Spotted knapweed (Centaurea stoebe)
For more information on invasive plants and their management, CLICK HERE
Dominant native species:
Sandbar willow (Salix exigua)
Wild Celery (Vallisneria americana)
Elodea (Elodea canadensis)
Naiad (Naja flexilis)
Fragrant water lily (Nymphaea odorata)
Big bluestem (Andropogon gerardii)
For more information on native plants around Muskegon Lake, CLICK HERE
Site Summary:
As water levels have risen at the site, plant diversity has been reduced over previous years. The existing shrubs, primarily sandbar willow, have stabilized the shoreline where they are intermixed with the rock toe. The high water levels have reduced the size of the overall peninsula. Some soil erosion was noted at the northern end of the peninsula.
The southern border of the site, closest to the bike path, has eroded along an approximately 100’ stretch. This location is intended for eventual development, so restoration measures were limited at the time of construction.
Native Mean C=average coefficient of conservatism (C). Each plant is assigned a “C” value, which represents the probability that a plant will occur in an undisturbed area. C values range from 0-10. Wetlands with a native mean C greater than 3.5 are considered “high quality aquatic resources” (USFWS)
FQI=Floristic Quality Inventory, which is an indication of quality of the vegetation at a given site. In general, wetlands with an FQI above 20 are considered “high quality aquatic resources” (USFWS)
Management Recommendations
Invasive species are minimally present at the site. The only invasive plant species documented was spotted knapweed, which can be removed by hand pulling or selective herbicide applications. For more information on invasive plant management, CLICK HERE.
The site should be assessed for erosion monthly during high water periods. Additional stone may need to be placed if significant erosion occurs. To place stone, a permit will be required by the Michigan Department of Environment, Great Lakes, and Energy (EGLE).
The site should be monitored 2-3 times per year to look for erosion and any invasive plants.