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D-2 <br /> equipment, etc.)there will be no "growth medium"replacement, as the existing"growth medium"will effectively <br /> be left in place for the short-duration of mining and processing operations. Those areas will, however, be subject <br /> to grading/smoothing and discing(if appropriate), in advance of revegetation efforts. <br /> The perimeter roadway, comprised of an 8-inch thick coarse aggregate base, will be scarified in-place and <br /> intermixed with the underlying sand matrix, after which the windrowed berm material (otherwise designated as <br /> topsoil stockpile TS-2) will be returned to the roadway footprint area and placed atop the scarified/intermixed <br /> material to establish a nominal 8-to 12-inch growth medium cover. <br /> (b) Maximum Gradient of Reclaimed Slopes <br /> Per Exhibit C: Mining Plan,areas to be excavated within the Permit Area are limited to the main mine pit and the <br /> fines recovery pit, respectively. Each of these features will be maintained at a nominal 311:1 V (horizontal to <br /> vertical) side-slope configuration during mining, a slope condition considered commensurate with natural angle of <br /> repose of the sand materials after exposure to the effects of natural drying and sloughing, etc. Post-mining <br /> reclamation conditions or activities will further reduce the slope gradient. <br /> Fines Recovery Pit: As described in Exhibit C: Mining Plan, the fines recovery pit will be filled to near or at full <br /> capacity by the fines slurry, resulting in little to no excavated slope exposure at the conclusion of mining and <br /> processing operations;however,a minor"depression"may remain. Final growth medium placement atop the fines <br /> matrix will further reduce that amount of"depression", if any. <br /> Main Mine Pit: With respect to the main mine pit, CSC anticipates that final slope conditions will more closely <br /> approximate 3.5H:1 V(or less)after crest reduction and final site regrading and recontouring, due to the following: <br /> (1) CSC will eliminate the main mine pit crest by layback, pushing it down (via dozer and/or hydraulic <br /> excavator) into the pit depression in order to further reduce the overall slope gradient; and, <br /> (2) This will be followed by placement of the nominal 8- to 12-inches of "growth medium" (previously <br /> salvaged and stockpiled in topsoil stockpile TS-IA) across the full surface area of the reclaimed pit (e.g., <br /> Keenesburg Project—Limited Impact 110 Application_May 24,2019 <br />