2017-12-20_REVISION - M1977219 - Laserfiche WebLink

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Exhibit D Mining Plan (cont) As the topsoil is removed on a Area it will be placed in stockpiles along the edges of the mining area or on the floor of the previous Area being reclaimed. The stockpiles will be located in areas where disturbances by ongoing mining operations will be at a minimum, i . e . , along setbacks on the pit perimeter. The topsoil will be handled as little as possible until it is replaced onto disturbed areas . If the topsoil/growth medium piles remain undisturbed for more than 180 days, 40 . 0 #PLS of Western Wheatgrass, per acres of surface area will be planted on the piles or other means will be employed to preserve the piles from wind and water erosion. This will keep it free of contaminants so that it remains useful for sustaining vegetation when reclama- tion begins . Once the sandstone is exposed, it will be drilled and shot as described in the approved Blasting Plan. The sand- stone varies greatly in thickness but mining will only occur where it is between 0 and 35 feet thick. In most Areas, mining and processing will begin on the east side of the area and move from east to west . The plan is to have a north/south trending open mining face that stretches across each area. No highwalls or backfilled slopes are planned on the sides where the mining can daylight out into the canyons that bisect several of the areas within the property. During the life of the mine inert material as defined in Rule 1 . 1 (20) may be imported into the site for use to rebuild slopes or other reclamation. This material will consist mostly of reject brick produced from materials mined at this site . Some of the brick material may be processed and reused in brick manufac- ture or for road base . We have included an Inert Material affidavit , as required Rule 3 . 1 . 5 (9) in the Appendix of this submittal . Material processing will continue in Area A until there is sufficient floor area for the material stockpiles and processing areas . Of the 1046 . 8 acres in this amendment, the old permit area covers 40 . 3 acres ± and the new area is 1006 . 5 acres ± . The mined area will be reclaimed as rangeland to return it to its present use . There is adequate topsoil, overburden and waste material onsite to complete the sloping without importing mate- rial should mining and reclamation ended prematurely. The approved plan calls for, having no more than 40 . 00 acres ± disturbed or need more than 1000 feet of slope grading at any- one-time . The Mining Plan Map shows how the mine will look when approx- imately 36% of Area D is mined. Note how some of the mined area around the perimeter of Area D has been day lighted out the north and south sides and reclamation is completed on Areas A, B & C. The working face will be mined near vertical (0h: 1y) to maximize removal of material from the mine . At its widest point, the working face will be kept to less then 1000 feet long. If mining ended prematurely, the current backfill sloping method will be used on the working face using material found on the mine area, The temporary sloping plan that keeps the working face limited, reduces the amount of sloping work needed in the larger 6 (revised 12/18/17)