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trend in iron concentrations, however these levels are still within historic ranges seen for this site, with the <br />exception of an elevated value in late July 2012. This may also be related to the vegetation clearance <br />discussed above. Note that during 2012 1 SP stopped flowing the first 3 weeks in January, from late June <br />through mid October, and stopped flowing again during part of December. We had one iron exceedance in <br />December of 2012 before the site stopped discharging. This sporadically happens during very low flow <br />periods shortly before the spring stopped flowing altogether. <br />3.2.3 Ponds <br />With the exception of Outfall 003 (discussed under section 3.1.2), there was no recorded discharge from the <br />other on -site sediment ponds in 2012. <br />4.0 SUMMARY AND CONCLUSIONS <br />DRMS monitoring requirements for the BTU Empire site were met in 2012. The subject mine site ceased <br />active mining operations in 1995, and has been inactive to date, thus, total mined acreage did not change in <br />2012. The mine was subsequently placed in Temporary Cessation under TR01 -32. Temporary Cessation <br />status ended in the second quarter of 2006, when BTU EC re- activated full water monitoring activities in <br />anticipation of future re- activation of the mine site, and because a bond release application was also being <br />contemplated for the Utah Tract and Williams Fork Strip Pit portions of the mine property. With the <br />exception of anomalous elevated conductivity values detected in wells TR -4 and 81 -01, as well as the 9 Mine <br />well and well 259, no significant, unpredicted, or adverse environmental impacts were noted during <br />hydrologic monitoring for 2012. Williams Fork will continue to monitor and examine these anomalies <br />further in hopes of determining a probable cause. <br />Page 8 <br />G \Environmental\EMPIREWILLIAMS FORK \Water Permits & Re1ated\A1iR\2012 \Empire2012AHR doc <br />