Low Elevation
< 370 feet above mean sea level
Low Place
Beaucoup Creek
Low Quad Name
Vergennes
Low PLSS
3-31-6S-2W
Low Geology
Cahokia Alluvium and Equality Carmi in river valley
High Elevation
> 580 feet above mean sea level
High Place
unnamed hilltop
High Quad Name
Coulterville
High PLSS
3-22-4S-4W
High Geology
Thin Vandalia Till over Pennsylvanian Modesto Formation
Area
442.30 square miles
Total Relief
210 feet
Percent Slope
0.73%