
Ohio River navigation and the complex wetland ecology of the river bottoms dominate this mid-century survey along the Illinois-Kentucky border. The landscape is defined by the Lock and Dam No 53 and the Grand Chain, a treacherous stretch of river where the limestone shelf created natural hazards for river traffic. Inland, the topography shifts into the Oscar Bottoms and Barlow Bottoms, a dense network of seasonal waterways and standing water such as Shelby Lake, Mud Lake, and Beaverdam Slough.
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This is the sole edition of this map. No revisions or reprints were ever made.
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