Orland Grassland South Wetland Mitigation Project

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.