Agencies
Services
Land and Water Reserve Area
4
County
McDonough
Location
The site is in southwestern McDonough County, about 1-miles east of Colmar.
Description
Grigsby Marsh Land and Water Reserve contains Grade B shrub swamp and marsh, and five natural seep springs that feed into the wetland, identified by the Illinois Natural Areas Inventory (Grigsby Marsh INAI #0171). The marsh and shrub swamp are high-quality and exceptional natural features in good condition which represents 80% of all high-diversity wetland identified by the INAI for the Galesburg Section of the Western Forest-Prairie Natural Division. The seep springs that feed the wetland are also considered exceptional natural features. The high-quality natural areas are surrounded by additional lower-quality marsh and second growth dry-mesic upland forest dominated by oak-hickory species. The site additionally provides habitat for at least three wildlife Species in Greatest Need of Conservation, identified by the Illinois Wildlife Action Plan.
Ownership
Illinois Department of Natural Resources
Natural Division
Galesburg Section of the Western Forest-Prairie Natural Division (#7a)
Registered
May 1998
Size
37 acres
Access
The site is not open to the public.
Topographic Quad
Plymouth & Fandon
For Further Information
Illinois Nature Preserves Commission
One Natural Resources Way
Springfield, IL 62702
217-785-8686
DNR.INPC@illinois.gov