Lowest and Highest Points in Johnson County

Lowest and Highest Points in Johnson County
Low Elevation: 
<330 feet above mean sea level
Low Place: 
Cache River
Low Quad Name: 
Cyress
Low PLSS: 
4-18-14S-2E
Low Geology: 
Cahokia Alluvium, river valley
High Elevation: 
>850 feet above mean sea level
High Place: 
unnamed hilltop
High Quad Name: 
Lick Creek
High PLSS: 
3-18-11S-2E
High Geology: 
Pennsylvanian Caseyville Sandstone ridge
Area: 
345.03 square miles
Total Relief: 
520 feet
Percent Slope: 
3.01%
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