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The Wetlands Group within the Illinois Natural
History Survey performs this work under a statewide
contract with the IDOT. Under the CWA and
IWPA, the IDOT must demonstrate that all measures
were taken to first avoid and then minimize impacts
to wetlands to the fullest extent practicable.
Unavoidable impacts are mitigated by way of wetland
compensation through either restoration or creation
of wetlands. Methods used by the IDOT to
restore or create wetlands follow the
Illinois Wetland Restoration and Creation Guide.
In addition to the INHS Wetlands Group the Wetlands
Geology Section at the Illinois State Geological
Survey provides technical assistance to the IDOT in
locating, evaluating and monitoring compensatory
wetlands. All IDOT wetland compensation plans
include a commitment to monitor planned wetlands for
attainment of performance standards. Below are
electronic copies of monitoring reports for active
and inactive wetland compensation efforts throughout
the state. Departmental procedures for
ensuring compliance with the CWA and IWPA are
detailed in the
IDOT Wetlands Action Plan, Bureau of Design and
Environment Manual, Chapter 22 [section 22-4.05 (b),
22-5.05] and, located at the end of the BDE Manual,
in Procedure Memorandum 33-03.
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