Lowest and Highest Points in Union County

Union County map key
Low elevation: <340 feet above mean sea level
      Places: Cypress Creek and Mississippi River
      7.5' quadrangle names: Cypress and McClure
      PLSS: 3-36-13S-1E and 3-31-13S-3W
      Geology: Cahokia Alluvium in river valley

High elevation: >1020 feet above mean sea level
      Place: Bald Knob
      7.5' quadrangle name: Cobden
      PLSS: 3-11-26N-3W
      Geology: Lower Devonian hill, the State's biggest,
            having over 620 feet of relief in a distance of
            about 1 mile


Area: 417.84 square miles
      Total relief (approximate): 680 feet
      Average percent slope: 3.15%



High/Low Home


Updated 05/27/2011 SLD

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