Low Elevation
< 385 feet above mean sea level
Low Place
Kaskaskia River
Low Quad Name
Venedy
Low PLSS
3-30-1S-5W
Low Geology
Cahokia Alluvium, river valley
High Elevation
> 583 feet above mean sea level
High Place
unnamed hilltop
High Quad Name
Oakdale
High PLSS
3-16-3S-4W
High Geology
Hagarstown ridge
Area
557.82 square miles
Total Relief
198 feet
Percent Slope
0.71%