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elements that are detectable and those that are not have been consistent throughout the <br />groundwater well monitoring program at the Carbon Junction Mine. <br />CONCLUSIONS <br />Hydrologic sampling of three natural springs occurring above and below the mine site <br />showed no significant changes in parameter values during the 2003 water yeaz that would <br />indicate concerns with water associated with the area of the coal mining operation. <br />Springs 1 and 3 were dry during the December 2002 sampling event in water yeaz 2003. <br />Spring 4 was flowing during both water yeaz 2003 sampling periods. pH has generally <br />increased slightly in springs 3 and 4 over the last four water years. Springs 3 and 4 have <br />exhibited slight to significant decreases in the concentrations of bicarbonate and <br />manganese. Both springs 3 and 4 have shown increased concentrations of magnesium and <br />sulfate over the past three water years. Changes during the last two to three water years <br />in magnesium and sodium concentrations may well be linked to drought conditions over <br />the last few water years in the area. <br />Groundwater wells above and below the mine site showed few significant changes in <br />pazameter values during the 2003 water year. Wells 94-1 and 95-1 showed overall <br />decreases in TDS, chloride, and magnesium concentrations over time. Well 17-B (above <br />the mine) continues to have overall low concentrations of chloride. Wells 94-1 and 95-1 <br />. showed slight elevations in manganese concentration for the last two water years, though <br />these levels remain within historic ranges. <br />SEDIMENT POND INSPECTIONS AND DISCHARGES <br />The Carbon Junction Mine has two sediment ponds, 001 and 002. Monte Potter and/or <br />Marcia Taivitie of Four Comers Materials prepared inspection reports for both sediment <br />ponds during the first (December 3, 2002), second (March 31, 2003), third (June 19, <br />2003) and fourth (August 27, 2003) quarters of the 2003 water year. Sediment pond <br />inspection reports aze included for the 2003 water year. No significant concerns were <br />identified during the inspections. <br />Neither sediment pond discharged during water year 2003 as reported on CDPS discharge <br />monitoring reports. Copies of available reports for the 2003 water year aze appended to <br />the end of this report. <br />L II <br />Grbon Junction MMe Page 12 <br />Mnual Hydrologk RePorGPor Warsr Yqr 2008 <br />