Low Elevation
< 395 feet above mean sea level
Low Place
Wabash River
Low Quad Name
St. Francisville
Low PLSS
2-29-2N-11W
Low Geology
Cahokia Alluvium
High Elevation
> 630 feet above mean sea level
High Place
Red Hills Chapel
High Quad Name
Summer
High PLSS
2-34-4N-13W
High Geology
Illinois Vandalia till over Pennsylvanian Mattoon Formation
Area
369.94 square miles
Total Relief
235 feet
Percent Slope
0.84%