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%