Laserfiche WebLink
t <br />EXHIBIT 23 <br />I. INTRODUCTION <br />The South Taylor In -Pit Drilling Program will consist of drilling 40 drill holes in order obtain data <br />to update and improve the South Taylor Geologic Model. All drill holes proposed under this <br />exploration program will be drilled within the confines of the South Taylor Pit except several <br />holes which will be drilled on the end wall of the South Taylor Pit. The entire area proposed to <br />be drilled occurs in areas that have already been disturbed by mining and are included under <br />Colowyo's current reclamation liability. Planned drill holes will be drilled to approximately 20 <br />feet below the G8 seam which is the lower most seam in the mining sequence. This twenty feet <br />of additional hole below the G8 seam is called the "rat hole ", and each rat hole will be plugged <br />and sealed as outlined in Section II Sealing of Drilling Holes. <br />The proposed drill holes can be grouped into five different categories based on location and <br />required plugging procedures required for each individual drill hole. Additionally, these <br />categories distinguish between the approximate depth that mining activities will occur <br />(determined from the current mine sequence) and the approximate total depth of each drill <br />hole planned. Tables Exh. 23 -1 through Exh. 23 -5 outline these five categories based on seam <br />location and also provide hole diameter, total planned depth, and depth of the hole that will <br />not be mined through. The proposed depths for the drill hole and the rat hole are estimated <br />and actual drilling will fully define these depths. <br />II. SEALING OF DRILLED HOLES <br />Pursuant to Rule 4.07.2, plugging methods will include pumping heavy solids bentonite mud <br />through the drill stem from the bottom of the hole to the indicated depths presented on Tables <br />Exh. 23 -1 through Exh. 23 -4. Drill holes listed on Tables Exh. 23 -1 through Exh. 23 -4 will be <br />completely or partially mined through, and these holes will be reclaimed in accordance with <br />Section 2.05.4 in the approved permit application package (PAP). <br />Pursuant to Rule 4.07.3, drill holes ST- 13 -17, ST- 13 -18, ST- 13 -19, and ST -13 -20 (see Table Exh. <br />23 -5) will be plugged with bentonite mud and capped with concrete as these holes will not be <br />mined through. Concrete and water will be poured into the hole from ten feet to three feet <br />below the surface and the final three feet will be filled with soil. Drill hole ST -13 -29 (see Table <br />Exh. 23 -5) does not require a concrete cap since it is not located on the natural surface. This <br />drill hole will be plugged completely by pumping heavy solids bentonite mud through the drill <br />Exhibit 23 Exh. 23 -1 Revision Date: 10/18/13 <br />Revision No.: MR -127 <br />