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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 2011. <br />4.0 SUMMARY AND CONCLUSIONS <br />DRMS monitoring requirements for the BTU Empire site were met in 2011. 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 />2011. 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, no significant, <br />unpredicted, or adverse environmental impacts were noted during hydrologic monitoring for 2011. <br />Williams fork will continue to monitor and examine these anomalies further in hopes of determining a <br />probable cause. DRMS monitoring requirements were met. <br />Page 8 <br />G: \Environmental \EMPIREWILLIAMS FORK\AHR\2011\Empire2011AHR doc <br />