Laserfiche WebLink
Prince Albert Mine 110(d) Permit Application Exhibit U - EPP <br />Ground water that is not intercepted by the underground workings of the Prince Albert Mine or that is <br />otherwise impacted by the mining operation could be expected to "daylight" as springs and seeps at the <br />Salt Wash / Wanakah formation contact in the nearby San Miguel and Dolores River canyons. <br />One down gradient monitoring well has been completed to the Entrada Formation (a total depth of 435 <br />feet) at the Prince Albert mine site to assess possible impacts to ground water quality from the mining <br />operation (see Figure U.7.4 "Down Gradient Monitoring Well Log "). An up gradient monitoring well can <br />be installed, as necessary, after consultation with State DRMS and USBLM staff. No ground water was <br />encountered during the drilling and completion of the down - gradient monitoring well on December 15, <br />2008. An attempt was made to collect a sample from the down gradient well during the past twelve <br />quarters since the installation date, with the last attempt made on 07/11/2011, and the well was found to <br />be dry on each sample collection attempt. <br />Water that may accumulate in the underground workings from direct infiltration, an encounter with a <br />small perched aquifer above a clay lens, or from excess water used in the mining operation should be <br />small enough in quantity that it will be absorbed into the broken and crushed rock that is the direct result <br />of the mining process. This absorption of excess water is desirable because it aids in dust suppression and <br />compaction during material handling both inside the mine workings and on the surface when waste rock <br />is placed on the waste pile or ore is stored and then shipped to the milling facility. Any larger quantity of <br />ground water that is encountered will be diverted into an excavated underground sump and used in the <br />underground mining process for dust suppression and drill water. <br />Rimrock Exploration & Development Page 27 of 39 <br />