Lowest and Highest Points in Tazewell County

Lowest and Highest Points in Tazewell County
Low Elevation: 
<440 feet above mean sea level
Low Place: 
Illinois River
Low Quad Name: 
Duck Island
Low PLSS: 
3-17-23-7W
Low Geology: 
Cahokia Alluvium, river valley
High Elevation: 
>830 feet above mean sea level
High Place: 
unnamed hilltop
High Quad Name: 
Washington
High PLSS: 
3-11-26N-3W
High Geology: 
Washington Moraine
Area: 
650.28 square miles
Total Relief: 
390 feet
Percent Slope: 
1.22%