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L-2 <br /> mine. The term"maximum exposure"is generally indicative of(final)reclamation requirements associated <br /> with the final (i.e., terminal) pit reclamation obligation; full process plant and facilities demolition, and, <br /> "full build-out"of the process waste stockpile, conditions,(subject reclamation conditions and topography <br /> are depicted in Exhibit E: Reclamation Plan and the requirements of Rule 4.2 — Financial Warranty <br /> Liability Amount.. <br /> Reclamation activities can be generally broken down as follows: <br /> Life-of-Mine Concurrent Reclamation <br /> Following initial development of sufficient pit void volume to support process waste stockpiling and long- <br /> term growth medium stockpiling, pit advance (commencing in Year 2) will occur such that pre-strip of <br /> growth medium in front of the advancing active mining face will be backhauled to the prior year's mine <br /> block for placement and revegetation. Accordingly, the concurrent reclamation is accomplished as a <br /> component of routine operations. Annual"mine blocks"range in area from 91 to 132 acres,with the final <br /> three years of mine life(i.e.,Years 11-13)encompassing an average of 132 acres. Thus, CSC has utilized <br /> 132 acres as the projected"maximum exposure" for terminal pit conditions, as all preceding mine blocks <br /> will have been reclaimed and revegetated, and in various stages of the prescribed five(5)year monitoring <br /> and maintenance period. <br /> Life-of-Mine Advance Reclamation <br /> The CSC mine plan incorporates the following "advance reclamation" activities which result in a <br /> proportionate reduction of the outstanding obligations at time of closure: <br /> • Year 3:Partial reclaim of the process waste stockpile(40 acres),which will include slope reduction <br /> to a nominal 5H:1 V gradient on inactive portions of the stockpile,to include replacement of growth <br /> medium and revegetation, all of which will be accomplished within the context of routine <br /> operations. <br /> • Year S: Additional partial reclaim of the process waste stockpile (15 acres), which will include <br /> slope reduction to a nominal 5H:1 V gradient on inactive portions of the stockpile, to include <br /> replacement of growth medium and revegetation, all of which will be accomplished within the <br /> context of routine operations. <br /> Keenesburg No. 2 Mine_112 Reclamation Operation—November 22, 2019 <br />