2017-11-14_REVISION - M1977219 - Laserfiche WebLink

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Exhibit D Mining Plan (cont) remains useful for sustaining vegetation when reclamation begins . Once the sandstone is exposed, it will be drilled and shot as described in the approved Blasting Plan. The sandstone varies greatly in thickness but mining will only occur where it is between 0 and 35 feet thick. In most Areas, mining and process- ing 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 1570 feet of slope grading at any- one-time. Due to the change to the sloping plan, the cost to do the sloping is reduced as the sandstone does not need to be blasted and sloped only the unconsolidated layer will need sloping. The rock high wall face, is not included in the slope grading number and if a working face becomes longer than 1570 feet the portion above that length will have a temporary slope installed above and below the open rock face . 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 (Oh: 1v) to maximize removal of material from the mine . At its widest point, the working face will be approximately 1570 feet long. If mining ended prematurely, a cut/fill sloping method will be used on the topsoil/overburden level and the clay seam would be backfilled to a 3h to lv slope, The rock face no greater than 25 feet would be left undisturbed. If the sandstone face height is greater then 25 feet, a 20 foot wide bench will be cut into the face to keep the height less then 25 feet . The temporary sloping plan that keeps the working face limited, reduces the amount of sloping work needed in the larger Areas like S & F. The mining operation setbacks will vary from 25 to 300 feet along the permit bound- 6 (revised 11/13/17)