"Map and Section of Illinois River Showing Proposed Improvement by Canal and Slackwater for Connecting the Mississippi River and Lake Michigan...", U.S. Corps of Engineers

This map accompanied General J.H. WIlson's report on the Illinois River. It covers the region from Lake Michigan to the Mississippi River along the Illinois River with Chicago presented as a grid at top. Adjacent to the path of the river is a rendering of the Illinois & Michigan Canal showing water depths. Wilson was tasked with quantifying necessary improvements to allow for large boats to pass from Lake Michigan to the Mississippi River during times of low water.

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Condition: B+

Issued folding with light toning along the fold lines and a few tiny splits at fold intersections.