2021-08-31_REVISION - M2017007 - Laserfiche WebLink

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MINING PLAN EXHlsrr D(coNT) how the site would look, depending on what option is used. Mining will begin in the southeast corner of the site and will continue, as shown on the Mining Plan Map, to the west and north. The Plant Site/stockpile area will start on the surface, but once bedrock is reached it will be moved to the floor of the mined area so it is screened below the surrounding areas . Map Exhibit C-1 shows how the site would look when the mine reaches full production. There will be 35. 0 acres of bonded disturbance at any-one- time. Of this 35 . 0 acres, the processing/stockpile area will cover approximately 15. 0 acres, there will be 3. 00 ac. stripped, and 5 . 00 acres where active mining is done and 12 acres of area being prepared for mining or partially reclaimed. The working face highwall will be 1, 000 feet long with another 1, 000 feet being temporary graded to 2h to 1v. The remaining highwall be kept at an interim grade of 2h to lv. The plan is to continue to mine into the gravel deposit at the mining face, working north and west until the permit limits are reached. For Option 1 there will be a 25-foot digline setback main- tained from the permit boundary so there is adequate space on the level above the slope for property line access, setback mainte- nance, grading and shaping. The setback from the house and school house will be 200 feet . If option 2 is used then the setbacks on the East, South & West will still be 25 feet, but the Perrino House Area and School House Area will be removed. The mine floor will slope towards the north to preserve the existing flow characteristics of land. Typically mining at Colorado Crushing' s, mining operations are done in cycles . These cycles involve moving a crushing plant into a mine and beginning to process material until there is a six month to 1 year supply of rock stockpiled. Once an adequate supply is processed, the crusher and equipment are moved to another mine. The stockpiles will be used throughout the year by the company. As mining ends on a section of the working face it is temporally graded to 2 : 1 so it is stable when there are no activities in the mine. Any resoiling and revegetation needed is completed when the area where material is removed will not be redisturbed. This cycle continues until the mine is played out . Each time the mine is re-enter mining begins by setting up the plant and stripping the area to be mined during this cycle. The topsoil and overburden will be stockpiled along the mine 9(Revised 8/12/21)