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2018 Map of Prairie du Rocher

Name: 2018 Topographic Map of Prairie du Rocher
Creator: U.S. Geological Survey
Published: 2018
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 2018

About this map

Prairie du Rocher and Ste. Genevieve anchor this riverfront landscape, which straddles the Mississippi River boundary between Illinois and Missouri. The terrain is defined by a sharp contrast between the expansive alluvial bottomlands and the dissected bluffs to the northeast. Within these uplands, natural features like Cow-Shank Natural Bridge and numerous hollows such as Barbeau Hollow and Stamm Hollow cut through the limestone.

A complex network of levees, including the prominent Levee Rd, protects agricultural lands and small settlements like Kellogg and Thomure from the river's seasonal shifts. The map documents several significant river features, including Turkey Island and Schmidts Island, alongside man-made drainage systems like The Discharge. This environment illustrates the ongoing engineering efforts to manage the river's path while maintaining access to historical transit points like the Modoc Ferry Rd.