Low Elevation
< 570 feet above mean sea level
Low Place
Cedar Creek
Low Quad Name
Avon
Low PLSS
4-1-8N-1W
Low Geology
Cahokia Alluvium, river valley
High Elevation
> 810 feet above mean sea level
High Place
unnamed hilltop
High Quad Name
Roseville
High PLSS
4-35-8N-3W
High Geology
Kellerville till uplands
Area
538.32 square miles
Total Relief
240 feet
Percent Slope
0.96%