Alliance for the Great Lakes
Calumet Heritage Partnership
Chicago Wilderness
City of Chicago
The Field Museum
Forest Preserve District of Cook County
Friends of the Chicago River
Friends of the Forest Preserves
Friends of the Parks
Indiana Dunes National Lakeshore
Lake Calumet Vision Committee
Openlands
Sierra Club
Southeast Environmental Task Force
US Army Corps of Engineers
US Environmental Protection Agency
US Fish and Wildlife Service
US Forest Service, Northern Research Station