Lowest and Highest Points in Jo Daviess County

Lowest and Highest Points in Jo Daviess County
Low Elevation: 
<590 feet above mean sea level
Low Place: 
Mississippi River
Low Quad Name: 
Green Island
Low PLSS: 
4-31-29N-2E
Low Geology: 
Cahokia Alluvium, river valley
High Elevation: 
>1 235 feet above mean sea level
High Place: 
Charles Mound
High Quad Name: 
Shullsburg
High PLSS: 
4-13-29N-2E
High Geology: 
Silurian limestone hill
Area: 
613.63 square miles
Total Relief: 
645 feet
Percent Slope: 
4.25%