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Mine Area Summary <br />Total Disturbance Area <br />Permanent Facilities & Soil Replaced <br />Remaining Disturbed Areas Requiring Soil <br />Soil in stockpiles (Table 13.1) <br />Mean Replacement Depth <br />= 1,291.5 acres <br />= 1,281.5 acres <br />= 10.0 acres <br />= 7.0 ac -ft <br />= 0.7 feet (8.4 inches) <br />TABLE 13.1- SOIL STOCKPILE VOLUMES (as of 12/31/13) <br />Stockpile <br />Designation <br />2008 Volume <br />ac -ft <br />2009 Volume <br />ac -ft <br />2010 Volume <br />ac -ft <br />2011 Volume <br />ac -ft <br />2013 Volume <br />ac -ft <br />I <br />41.6 <br />41.6 <br />41.6 <br />0.0 <br />0.0 <br />0.0 <br />0.0 <br />0.0 <br />0.0 <br />0.0 <br />L <br />0.0 <br />0.0 <br />0.0 <br />0.0 <br />0.0 <br />P2 <br />0.0 <br />0.0 <br />0.0 <br />0.0 <br />0.0 <br />AA <br />0.0 <br />0.0 <br />0.0 <br />0.0 <br />0.0 <br />BB <br />26.9 <br />26.9 <br />26.9 <br />13.5 <br />0.0 <br />CC <br />0.0 <br />0.0 <br />0.0 <br />0.0 <br />0.0 <br />GG <br />0.0 <br />0.0 <br />0.0 <br />0.0 <br />0.0 <br />HH <br />0.0 <br />0.0 <br />0.0 <br />0.0 <br />0.0 <br />11 <br />0.0 <br />0.0 <br />0.0 <br />0.0 <br />0.0 <br />KK <br />1.4 <br />1.4 <br />1.4 <br />1.4 <br />1.4 <br />PP <br />0.0 <br />0.0 <br />0.0 <br />0.0 <br />0.0 <br />QQ <br />0.0 <br />0.0 <br />0.0 <br />0.0 <br />0.0 <br />RR <br />0.0 <br />0.0 <br />0.0 <br />0.0 <br />0.0 <br />SS <br />0.0 <br />0.0 <br />0.0 <br />0.0 <br />0.0 <br />TT <br />0.0 <br />1 0.0 <br />0.0 <br />0.0 <br />0.0 <br />UU <br />0.0 <br />0.0 <br />0.0 <br />0.0 <br />0.0 <br />W <br />0.0 <br />0.0 <br />0.0 <br />0.0 <br />0.0 <br />WW <br />0.0 <br />0.0 <br />0.0 <br />0.0 <br />0.0 <br />XX <br />5.6 <br />5.6 <br />5.6 <br />5.6 <br />5.6 <br />YY <br />0.0 <br />0.0 <br />0.0 <br />0.0 <br />0.0 <br />ZZ <br />0.0 <br />0.0 <br />0.0 <br />0.0 <br />0.0 <br />AAA <br />0.0 <br />0.0 <br />0.0 <br />0.0 <br />0.0 <br />CCC <br />0.0 <br />0.0 <br />0.0 <br />0.0 <br />0.0 <br />DDD <br />0.0 <br />0.0 <br />0.0 <br />0.0 <br />0.0 <br />II -W MINE <br />TOTAL <br />75.5 <br />75.5 <br />75.5 <br />20.5 <br />7.0 <br />Spoil Monitoring. During a CDRMS inspection following snowmelt, surface cracking and a visible slump <br />were noted on the slope between Pond 006 and the haulroad to the south. SP coordinated with Northwest <br />Colorado Consultants (NWCC) to complete field observations, selective drilling, and a stability evaluation, <br />along with remediation recommendations. The field activities were completed during July and August, 2016, <br />and the NWCC Report was received in mid-October, 2016. SP has monitored site conditions following <br />snowmelt in 2017 and 2018, and no indications of significant additional movement have been noted. Unless <br />site conditions change significantly, indicating the need for more immediate action, SP anticipates that <br />remedial measures will be implemented in conjunction with final site reclamation activities within the next <br />few years. <br />2 <br />