IDOT Wetlands

The Wetlands Group conducts biological surveys and determinations of wetlands, participates in studies of mitigation of wetlands, and conducts studies of wetland soils, and plant and animal communities.

The members of the wetlands and preliminary studies group perform wetland delineations for Illinois Department of Transportation (IDOT) proposed highway widening, realignment, and bridge replacement projects.  Wetland delineation procedures are prescribed under the 1987 Army Corps of Engineers Wetlands Delineation Manual.  Using a variety of maps and aerial photographs in conjunction with the local soil survey, we determine whether the site meets the hydric soil, wetland hydrology, and hydrophytic vegetation criteria for wetlands required by the 1987 manual.  It is also our duty to conduct site assessment and post-construction monitoring for IDOT wetland restoration and creation projects throughout the state.  We provide public service by speaking to various school and interest groups and presenting workshops about our work.  Some of us also conduct independent research related to wetlands and their functions.