Low Elevation
< 540 feet above mean sea level
Low Place
Mississippi River
Low Quad Name
Blanchard Island
Low PLSS
4-34-16N-6W
Low Geology
Cahokia Alluvium
High Elevation
> 810 feet above mean sea level
High Place
unnamed hilltop
High Quad Name
Reynolds
High PLSS
4-31-16N-2W
High Geology
Illinoian Kellerville till upland
Area
447.32 square miles
Total Relief
270 feet
Percent Slope
1.50%