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Prince Albert Mine Plan of Operations 110(d) Operation Description <br />4.1.3 Ore Stockpile <br />Mine -run uranium ore is placed in a stockpile on the surface prior to shipment to the milling facility. <br />The surface storage pad for the uranium ore at the Prince Albert Mine has previously been <br />constructed on an existing large rock outcrop as part of the bulk sample collection process under <br />Prospect NOI P- 2005 -21 and consists of an existing 40 ft x 90 ft. stockpile area and down - gradient <br />sump. The ore is presently stockpiled on this outcrop under the bulk sample plan prior to shipment. <br />The rock outcrop base under the ore stockpile limits the downward migration of uranium from the <br />stockpile and the direct precipitation runoff sheet flows from the ore stockpile to the down gradient <br />sump for collection. The sump is sized to contain a direct precipitation run off volume that is the <br />equivalent of the 10 -year 24 -hour storm event. Any volume of run off that exceeds the 10 -year 24- <br />hour event will run down the mine access decline and be contained within the underground workings. <br />There will be no discharge of run off from the ore stockpile location to areas outside of the permitted <br />area. Note that sediments in run off from the ore stockpile area will not contain any mineralization <br />that is more significant than the mineralization that remains in the underground areas of the mine <br />after the extraction of the uranium ore. Sediments that precipitate in the sump from run off are <br />periodically removed from the sump using a skidsteer loader and deposited on the ore stockpile for <br />shipment to the milling facility. <br />A Synthetic Precipitation Leach Procedure analysis of a typical ore sample is attached as Figure <br />U.10.3 to the attached Attachment 1, Exhibit U "EPP "). <br />4.1.4 Mine Waste Rock Stockpiles <br />There may be two mine waste rock stockpiles developed as part of the expanded 110(d) Prince Albert <br />Mine. The existing waste pile located northeast of the mine portal from development work <br />conducted under Prospect NOI P- 2005 -21 will be incorporated into an expansion of that same pile <br />under the 110(d) permit. This waste pile is labeled as the Primary Mine Waste Pile on the Figure 3 <br />"Mine Plan Site Map." A second waste pile may also be developed under the expanded 110(d) mine <br />operation depending upon the overall size of the ore resource and the economics associated with <br />accessing that resource from one location. This pile would be located southwest of the mine portal <br />and is labeled as the Secondary Mine Waste Pile on the Figure 3 "Mine Plan Site Map." The waste <br />rock piles will be constructed with a 3H to 1V exterior slope starting at the farthest extent of the final <br />waste pile footprint and proceeding back towards the mine portal location as waste is excavated <br />underground and brought to the surface. Initially, a roadway will be cut through the topsoil to the <br />farthest extent of the footprint limit and then topsoil and vegetation will only be removed in the area <br />Rimrock Exploration and Development Page 11 of 27 <br />