Lowest and Highest Points in McDonough County

Lowest and Highest Points in McDonough County
Low Elevation: 
<500 feet above mean sea level
Low Place: 
Camp Grindestone Creek
Low Quad Name: 
Fandon
Low PLSS: 
4-36-15S-4W
Low Geology: 
Cahokia Alluvium
High Elevation: 
>800 feet above mean sea level
High Place: 
unnamed hilltop
High Quad Name: 
Raritan
High PLSS: 
4-7-7N-3W
High Geology: 
Thin Illinois Kellerville till over Pennsylvanian Carbondale Formation
Area: 
583.92 square miles
Total Relief: 
300 feet
Percent Slope: 
1.13%