Laserfiche WebLink
POND CAPACITY - ACRE FEET <br />Water <br />Sediment <br />Total <br />0.67 <br />0.28 <br />0.95 <br />McClane Canyon Mining, LLC <br />McCLANE CANYON MINE <br />2013 IMPOUNDMENT YEARLY INSPECTION <br />In accordance with Rule 4.05.9(14), all impoundments shall be inspected at least yearly <br />to determine if the impoundment has been maintained as designed, and in accordance <br />with the approved plan and the applicable regulations. This yearly inspection is for the <br />impoundment located at the McClane Canyon Mine. <br />On March 14, 2013, I performed the required yearly inspection. I, J. E. Stover, have a <br />wide variety of experience in the design and construction of earth fill embankments. <br />Nothing was observed during the inspection that would indicate the pond has a <br />potential for failure. There was no appearance of erosion, instability, structural <br />weakness or other hazardous conditions. There are no required monitoring procedures <br />or instrumentation other than quarterly and yearly inspections. There are no aspects <br />which might affect stability and there is no required maintenance. The sediment pond <br />had water standing 18 inches below the level of the primary spillway at approximate <br />elevation of 5455.5. The pond /impoundment was not discharging during the inspection. <br />The required capacity of the sediment pond is 0.55 A -F. The required water capacity of <br />the sediment pond is 0.36 A -F and the required sediment capacity is 0.19 A -F (ref. PAP <br />Section 2.4.1 and Table 4.2 -12). The actual size of the pond exceeds the required <br />capacities listed in the permit. <br />The sediment pond has the following estimated capacity based on the existing water <br />level in the pond: <br />To the best of my knowledge and belief, tpt� � ,Od it/sediment pond at the <br />McClane Canyon Mine has been maint ° s deslgnd in accordance with the <br />approved plan and applicable regulati ,. ° c0` it <br />• <br />a e <br />James E. Stover :0 <br />Colorado Professior$t <br />Registration No. 192 <br />• <br />4/16(3 leJate <br />4Pa At. .- �� <br />•nvae• <br />