Low Elevation
< 600 feet above mean sea level
Low Place
Walnut Creek
Low Quad Name
Laura
Low PLSS
4-31-12N-5E
Low Geology
Cahokia Alluvium, river valley
High Elevation
> 875 feet above mean sea level
High Place
2 unnamed hilltops
High Quad Name
Castleton
High PLSS
4-23 and 25-13N-7E
High Geology
Buda Moraine crests
Area
285.67 square miles
Total Relief
275 feet
Percent Slope
0.95%