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Colowyo Coal Company <br />2014 Annual Reclamation and Hydrology Report <br />Iron <br />0.09 <br />0.07 <br />0.25 <br />0.30 <br />0.05 <br />03/14/12 <br />03/22/11 <br />Magnesium <br />94.88 <br />3.10 <br />14 <br />101 <br />87 <br />05/19/14 <br />03/14/12 <br />Sodium <br />30.38 <br />1.09 <br />4 <br />32 <br />28 <br />08/18/11 <br />03/18/14 <br />Elevation <br />14.38 <br />3.82 <br />16.31 <br />24.29 <br />7.98 <br />11/08/11 <br />05/04/11 <br />Evaluation of 2014 data for MJ -95 -01 Well <br />Maximum values for conductivity, calcium, and magnesium were recorded during 2014. <br />Minimum values for pH, and sodium were recorded during 2014. Trend line analysis <br />determined no significant correlations over time. <br />MJ- 95 -03: <br />Parameter <br />Mean <br />Std <br />dev <br />Range <br />Max. <br />Min. <br />Max at <br />Min at <br />Lab pH <br />8.12 <br />0.14 <br />0.60 <br />8.30 <br />7.70 <br />03/13/13 <br />11/05/14 <br />Lab Cond. <br />2223.13 <br />173.66 <br />670 <br />2430 <br />1760 <br />08/27/14 <br />05/04/11 <br />TDS <br />1793.75 <br />77.79 <br />260 <br />1920 <br />1660 <br />08/18/11 <br />05/23/13 <br />Sulfate <br />802.06 <br />60.43 <br />205 <br />891 <br />686 <br />05/04/11 <br />11/08/11 <br />Calcium <br />146.69 <br />7.07 <br />22 <br />157 <br />135 <br />08/27/14 <br />11/19/13 <br />Iron <br />0.06 <br />0.04 <br />0.17 <br />0.22 <br />0.05 <br />03/14/12 <br />03/22/11 <br />Magnesium <br />196.19 <br />11.40 <br />36 <br />217 <br />181 <br />03/22/11 <br />03/13/13 <br />Sodium <br />146.88 <br />9.56 <br />36 <br />166 <br />130 <br />03/22/11 <br />03/18/14 <br />Elevation <br />20.02 <br />1.19 <br />5.16 <br />20.92 <br />15.76 <br />07/31/13 <br />11/08/11 <br />Evaluation of 2014 data for MJ -95 -03 Well <br />Maximum values for conductivity, and calcium were recorded during 2014. Minimum <br />values for pH, and sodium were recorded during 2014. Trend line analysis determined no <br />significant correlations over time. <br />SPOIL SPRING DEVELOPMENT <br />A limited number of low impact spoil springs may develop occasionally, but their aerial <br />extent and low level or non - existent surface flow will have a very minor impact on <br />surface (and shallow groundwater /perched aquifer) water quality and quantity in the <br />future. Colowyo is not aware of any springs that have developed due to rain/snowmelt <br />percolating through the spoil and emerging down gradient. <br />Several active native springs have been identified on the reclaimed surface at the <br />Colowyo Mine. These springs are the result of groundwater movement from <br />groundwater complexes that were present pre- mining, whose waters pass through <br />regraded overburden subsurface from the highwall (non -mined areas), and emerge at a <br />location down gradient in the reclaimed surface. Colowyo has detected four springs that <br />originate from non -mined areas in the highwall and percolate through the regraded spoil <br />and emerge on the reclaimed surface. Two springs are located just south of the East <br />Taylor Pond in reclamation parcel WP014. Each of these springs are located where the <br />final highwall was regraded to the approved PMT. Two additional springs have been <br />Page 2 -12 <br />