Lowest and Highest Points in Henderson County

Lowest and Highest Points in Henderson County
Low Elevation: 
<518 feet above mean sea level
Low Place: 
Mississippi River
Low Quad Name: 
Dallas City
Low PLSS: 
4-34-8N-7W
Low Geology: 
Cahokia Alluvium, river valley
High Elevation: 
>800 feet above mean sea level
High Place: 
unnamed hilltop
High Quad Name: 
Raritan
High PLSS: 
4-25-8N-4W
High Geology: 
Thin Illinois Kellerville till upland over Pennsylvanian Carbondale Formation
Area: 
391.97 square miles
Total Relief: 
282 feet
Percent Slope: 
1.04%
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