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<br />. <br /> <br />Estimated Aquifer Levels at Spring <br />(1972-2009) <br /> <br /> 2 <br /> l <br /> \ I ~ <br /> 0 r <br /> \Il ~\~ <br />] -2 } <br />'" <br />1;; <br />5 <br />'0 ~ <br />-" <br />g. -4 l <br />0 <br /> -6 <br /> II <br /> -8 <br /> Approx. Ground Level <br /> -10 <br /> 1970 1975 1980 1985 1990 1995 2000 2005 2010 <br /> Date <br /> <br />4 <br /> <br />Data from Minnesota DNR <br /> <br /> <br /> <br /> <br /> <br /> <br />