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McHenry County


mchenry county map Map legend and scale


Low elevation: <730 feet above mean sea level
      Place: Fox River
      7.5' quadrangle name: Crystal Lake
      PLSS: 3-34-43N-8E
      Geology: Cahokia Alluvium in river valley

High elevation: ~1189 feet above mean sea level
      Place: Unnamed hilltop
      7.5' quadrangle name: Harvard
      PLSS: 3-17-46N-6E
      Geology: Woodstock / Marengo Moraine

Area: 606.12 square miles
      Total relief (approximate): 459 feet
      Average percent slope: 1.24%


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ILLINOIS STATE GEOLOGICAL SURVEY
INSTITUTE OF NATURAL RESOURCE SUSTAINABILITY     |    UNIVERSITY OF ILLINOIS AT URBANA-CHAMPAIGN

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Updated 5/7/2007 JKH