Low Elevation
< 605 feet above mean sea level
Low Place
Salt Creek
Low Quad Name
Chestnut
Low PLSS
3-7-19N-1E
Low Geology
Cahokia Alluvium, river valley
High Elevation
> 811 feet above mean sea level
High Place
unnamed hilltop
High Quad Name
Heyworth
High PLSS
3-21-21N-3E
High Geology
Heyworth Moraine
Area
400.71 square miles
Total Relief
206 feet
Percent Slope
0.63%