Lowest and Highest Points in Henry County

Lowest and Highest Points in Henry County
Low Elevation: 
<560 feet above mean sea level
Low Place: 
Rock River
Low Quad Name: 
Coal Valley
Low PLSS: 
4-19-17N-1E
Low Geology: 
Cahokia Alluvium, river valley
High Elevation: 
>875 feet above mean sea level
High Place: 
unnamed hilltop
High Quad Name: 
Kewanee South
High PLSS: 
4-1-14N-4E
High Geology: 
Loess hill over thin Illinois Glasford till over Pennsylvanian Carbondale Formation
Area: 
817.22 square miles
Total Relief: 
315 feet
Percent Slope: 
1.11%