McHenry County, Illinois Advanced Identification of Wetlands
- Public Notice of Advance Identification of Wetlands (ADID) Study Finalization
- Public Notice of Exertion of Discretionary Authority over McHenry County ADID Wetlands
- ADID Study, Final Report, December 1998
- McHenry County Weblink
- McHenry County GIS Viewer - Turn on the wetland layer and look at the legend for ADID maps
As part of the ADID process, a geographical information system (GIS) was developed by the Chicago Metropolitan Agency for Planning (CMAP).
McHenry County ADID Maps by Township
Each map has a legend that lists aquatic resources by a number. The following resource categories were included in the ADID designation: High quality streams, High quality lakes, High quality habitat wetlands, and High functional value wetlands.