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Grundy County


grundy county map Map legend and scale


Low elevation: <510 feet above mean sea level
      Place: Illinois River
      7.5' quadrangle name: Seneca
      PLSS: 3-30-33N-6E
      Geology: Cahokia Alluvium in river valley

High elevation:  >700 feet above mean sea level
      Place: Unnamed hilltop
      7.5' quadrangle name: Stavanger
      PLSS: 3-6-34N-6E
      Geology: Ransom Moraine

Area: 426.49 square miles
      Total relief (approximate): 190 feet
      Average percent slope: 0.54%


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Updated 5/4/2007 JKH