Illinois Tollway


Illinois Tollway

Project Cost


Market Sector



Water Resources, Wetlands & Ecology

Orland Grassland South Wetland Mitigation Project

Orland Park, Illinois

The Orland Grassland mitigation site was selected by the Illinois Tollway to offset wetland impacts associated with the Jane Addams Tollway (I-90) expansion. V3 evaluated the feasibility of restoring the historic hydrology and the potential for wetland restoration by classifying and mapping the hydric soils present and completing a hydrologic and hydraulic assessment. The final mitigation plan included more than 65 acres of wetland mitigation credits through re-establishment of historic wetlands, enhancement of existing wetlands and prairie buffer establishment. In addition, approximately six acres of stream mitigation credits were achieved through the hydrologic restoration and remeandering of a headwater swale.