Lowest and Highest Points in Edwards County

Lowest and Highest Points in Edwards County
Low Elevation: 
<360 feet above mean sea level
Low Place: 
Bonpas Creek
Low Quad Name: 
Grayville
Low PLSS: 
2-16-3S-14W
Low Geology: 
Cahokia Alluvium
High Elevation: 
>550 feet above mean sea level
High Place: 
unnamed hilltop
High Quad Name: 
West Salem
High PLSS: 
3-31-2N-11E
High Geology: 
Illinois Vandalia till upland over Pennsylvanian Mattoon Formation
Area: 
220.38 square miles
Total Relief: 
190 feet
Percent Slope: 
1.21%