Low Elevation
< 410 feet above mean sea level
Low Place
Rend Lake
Low Quad Name
Waltonville
Low PLSS
3-16-4S-2E
Low Geology
Lake in river valley
High Elevation
> 630 feet above mean sea level
High Place
unnamed hilltop
High Quad Name
Kell
High PLSS
3-2-1S-2E
High Geology
Vandalia till upland over Pennsylvanian Mattoon Formation Hagarstown ridge
Area
577.55 square miles
Total Relief
220 feet
Percent Slope
0.95%