C04_1-12445526Q0087-Att4-Map.pdf

This document is a geographic information system (GIS) map depicting the Grant Creek Aquatic Organism Passage project area located within Midewin National Tallgrass Prairie in Wilmington, Illinois. The map was compiled by the Midewin National Tallgrass Prairie office on April 8, 2025, using current GIS data available at that time.

The map illustrates the project location spanning portions of Will, Cook, Kane, Kankakee, DeKalb, LaSalle, Grundy, DuPage, Kendall, and Livingston counties in Illinois. Key features shown include Grant Creek (marked in blue), two Aquatic Organism Passage (AOP) locations identified as Coldwater Road AOP and Group 63 NW AOP (marked with yellow and green circles respectively), a trailhead, public trail access, and the prairie boundary. The USDA Forest Service manages the facility, with administrative offices located at 30239 South State Route 53, Wilmington, Illinois 60481. The map includes a scale bar indicating distances in miles and a regional context inset showing the prairie's location relative to Lake Michigan and surrounding counties. The document notes that GIS data displayed is intended specifically for this project and may yield inaccurate or misleading results if used for other purposes.