Lowest and Highest Points in Mercer County

Lowest and Highest Points in Mercer County
Low Elevation: 
<530 feet above mean sea level
Low Place: 
Mississippi River
Low Quad Name: 
Keithsburg
Low PLSS: 
4-34-13N-5W
Low Geology: 
Cahokia Alluvium, river valley
High Elevation: 
>820 feet above mean sea level
High Place: 
unnamed hilltop
High Quad Name: 
Reynolds
High PLSS: 
4-5-15N-2W
High Geology: 
Illinois Vandalia till member upland
Area: 
562.12 square miles
Total Relief: 
290 feet
Percent Slope: 
1.35%