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<br />60 <br />50 <br />d <br />40 <br />C <br />L <br />a <br />= 30 <br />O <br />ev <br />0) <br />u <br />3 <br />O 20 <br />LL <br />Spring G-31 (18) <br />Source: Above B-Seam <br />10 I <br />0 <br />Oct-77 Oct-79 Oct-81 Oct-83 Oct-85 Oct-87 Oct-89 Oct-91 Oct-93 Oct-95 Oct-97 Oct-99 Oct-01 Oct-03 Oct-05 Oct-07 Oct-09 Oct-11 <br />Date <br />West Elk Mine <br />D-23 2009 Annual Hydrology Report <br />HydroGeo, Inc.