
Glacial drumlins and extensive wetlands define the terrain of Jefferson County in the late nineteenth century, as documented by surveyors I.M. Buell and Van. H. Manning, Jr.. The Crawfish River and Rock River meander through the landscape, dictating the placement of early settlements like Aztalan and Johnson Creek. Significant water bodies such as Rock Lake, adjacent to Lake Mills, are captured before modern shoreline developments, providing a clear view of the natural hydrology of the era.
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