Lowest and Highest Points in Knox County

Lowest and Highest Points in Knox County
Low Elevation: 
<520 feet above mean sea level
Low Place: 
Spoon River
Low Quad Name: 
London Mills
Low PLSS: 
4-34-13N-2E
Low Geology: 
Cahokia Alluvium, river valley
High Elevation: 
>870 feet above mean sea level
High Place: 
Pilot Knob
High Quad Name: 
Oneida
High PLSS: 
4-26-13-N-2E
High Geology: 
Thin Hulic Till member over Pennsylvanian Carbondale Formation
Area: 
712.37 square miles
Total Relief: 
350 feet
Percent Slope: 
1.33%
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