Low Elevation
< 620 feet above mean sea level
Low Place
Fox River
Low Quad Name
Aurora South
Low PLSS
3-32-28N-8E
Low Geology
Cahokia Alluvium, river valley
High Elevation
> 1065 feet above mean sea level
High Place
unnamed hilltop
High Quad Name
Pingree Grove
High PLSS
3-19-41N-7E
High Geology
Marengo Moraine
Area
519.67 square miles
Total Relief
445 feet
Percent Slope
1.06%