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D-20 <br /> Year S Mininz Activity(Southeast Portion of Secdon 1 and North Portion of Section 12) <br /> The Year 5 mining activity will focus on the completion of mining the(established)resource base remaining <br /> within the southeast quarter of Section 1,with a more southerly-situated eastward push to the mine block <br /> limit,as defined by the western edge of the Ennis Draw"Temporary Mining Deferral Zone". <br /> Upon completion of full mine-out of the delineated resource base within the Section 1 area, the Year 5 <br /> mining activity will then move to the northern portion of the southerly abutting Section 12, employing a <br /> new box cut to enter the area south of the existing pipeline rights-of-way,pushing southerly with a full face <br /> width to the mine block limit;and,as constrained on its easternmost end by the presence of the diagonally- <br /> oriented Panhandle Eastern pipeline. <br /> The Year 5 mining activity is projected to encompass approximately 116 acres of mined area,and the mined <br /> tonnage(ROM) is anticipated to be approximately 5.1 million tons. An estimated 910,000 cubic yards of <br /> process waste will be placed in the waste storage area via an easterly expansion (truck dump and dozer <br /> push) of the footprint area within the previously-developed pit void. A total of approximately 194,000 <br /> cubic yards of growth medium will be pre-stripped in advance of mining, with a nominal 121,000 cubic <br /> yards being dedicated to concurrent reclamation activity and approximately 49,000 bank cubic yards being <br /> transported to the TS-1 stockpile. <br /> Additional"advance"reclamation will be carried out on the process waste stockpile, which, at the end of <br /> Year 5 is estimated to contain a total volume of approximately 4.5 million cubic yards, encompassing an <br /> approximately 50-acre area at an estimated height of sixty-three (63) ft. Thus, as measured from its pit <br /> floor foundation,the waste stockpile feature should rise approximately 30 to 33-ft. above the surrounding <br /> natural topography. Successive lifts will result in a maximum 3H:1 V side-slope(on active areas),consistent <br /> with the material's natural angle of repose. <br /> Years 6 throuieh 10 Minin-a Activity/Prosression(Remainder Section 12 and Sections 6 and S) <br /> The Year 6 mining activity will encompass completion of mining of the remaining identified resource base <br /> in the N1/2 of Section 12, pushing southward to its limit, as defined by the presence of the PanEnergy <br /> Services, Inc. pipeline right-of-way. Year 6 mining activity will then move to the location east of the <br /> diagonally-oriented Panhandle Eastern Pipeline Company right-of-way,thus requiring a new box cut in this <br /> Keenesburg No. 2 Mine_112 Reclamation Operation—November 22, 2019 <br />