Lowest and Highest Points in Alexander County

Alexander county map
Low Elevation: 
<290 feet above mean sea level
Low Place: 
Mississippi and Ohio Rivers
Low Quad Name: 
Wyatt
Low PLSS: 
3-32-17S-1E
Low Geology: 
Cahokia Alluvium in river valley
High Elevation: 
>820 feet above mean sea level
High Place: 
Dago Hill
High Quad Name: 
Mill Creek
High PLSS: 
3-10-14S-2W
High Geology: 
Loess over Devonian dolomite
Area: 
250.75 square miles
Total Relief: 
530 feet
Percent Slope: 
1.97%