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Prince Albert Mine Plan of Operations 110(d) Operation Description <br />exceeded, this water would be discharged to diversion ditches carrying water to the same natural <br />drainages as the perimeter diverted water. If these thresholds are exceeded, water would be <br />transferred using sump pumps to a permanent collection tank. This water would be sampled and sent <br />to a laboratory to be confirmed for the aforementioned analytes. If the analysis is below agency <br />specified thresholds, the water would be discharged into the same nearby natural drainages. If the <br />analysis exceeds regulatory thresholds, the water would be transported to and disposed of at an off - <br />site permitted facility dependent upon the final laboratory analysis. These ponds will remain <br />throughout the life of the active mine, and the initial period after reclamation, until adequate <br />vegetation has been established over the newly disturbed areas. <br />4.1.7 Ground Water Management <br />Negative effects on ground water resources from mining operations at the Prince Albert Mine are <br />expected to be very limited due to the characteristics of the local and regional hydrogeologic system <br />described under Section 3.8 Ground Water. <br />One down gradient monitoring well has been completed to the Entrada Formation (a total depth of <br />435 feet) at the Prince Albert mine site and an up gradient monitoring well can be installed, as <br />necessary, after consultation with State DRMS and USBLM staff. No ground water was encountered <br />during the drilling and completion of the down - gradient monitoring well on December 15, 2008. An <br />attempt was made to collect a sample from the down gradient well on twelve separate occasions <br />during 2008 — 2011, with the last attempt made on 07/11/2011, and the well was found to be dry on <br />each sample collection attempt. No ground water has been encountered to date in the underground <br />workings of the Prince Albert Mine. The only ground water encountered in the nearby and currently <br />inactive Buckshot Mine, an underground mine similar to the Prince Albert, consisted of small <br />quantities from direct infiltration through significant fractures or as a small perched pool on top of a <br />clay lens. Any ground water could be expected to "daylight" as springs and seeps at the formation <br />contact in the nearby San Miguel and Dolores River canyons, since the potential for the downward <br />migration in ground water of any contaminants from the mining operation in the Salt Wash Member <br />is very small due to the presence of the Wanakah aquitard below the Salt Wash Member of the <br />Morrison Formation. <br />See also Section U.7 of the Attachment 1, Exhibit U "EPP." <br />Rimrock Exploration and Development Page 14 of 27 <br />