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West Elk Mine 2003 Annual Hydrology Report 3 <br />•, Figure lc: Precipitation Data for McClure Pass. <br />Mc Clure Pass <br />4.5 <br />4 <br />ayi 3.5 <br />L <br />= 3 - - <br />'~ 2 5 -~ WY 2003 <br />0 <br />~ 2 <br />Y_ <br />~' 1.5 - --~Aeerage <br />'U <br />~ 1 1971-2000 <br />a <br />0.5 <br />0 <br />Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep <br />The daily snow water equivalent, a standard measure of snow pack, was collected from Snotel data <br />at Overland Reservoir and McClure Pass. Historical data for Overland Reservoir was available <br />beginning with 1990, and for McClure Pass beginning in 1981. The annual snow pack (snow water <br />equivalent) was 107% of the historical average for Overland Reservoir and 94°lo for McClure Pass. <br />A summary of the snow pack data is graphically shown in Figures ld and le. <br />• <br />September 2004 HydroGeo, Inc. <br />