
The Kaskaskia River carves a winding path through this region where the borders of St. Clair, Clinton, and Washington counties meet. The landscape is defined by the river’s complex hydrology, featuring numerous oxbow lakes and backwaters such as Swan Lake, Clear Lake, and Muddy Lake. These water bodies are surrounded by expansive wetlands that dictate the local geography, pushing settlements like Venedy and Johannissburg to slightly higher ground.
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