Low Elevation
< 680 feet above mean sea level
Low Place
Rock River
Low Quad Name
Kishwaukee
Low PLSS
3-19-43N-1E
Low Geology
Cahokia Alluvium, river valley
High Elevation
> 980 feet above mean sea level
High Place
unnamed hilltop
High Quad Name
Durand
High PLSS
4-7-29N-10E
High Geology
Thin Ogle till over Galena Platteville ridge
Area
515.20 square miles
Total Relief
300 feet
Percent Slope
1.73%