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MINING PLAN EXHIBIT D(CONT) <br /> materials in the old stockpile and along the fence so it was <br /> not disturbed. The areas of the old stockpile area will be <br /> reclaimed if disturbed. <br /> A 15-foot dig line setback will be maintained from the <br /> permit boundary so there is adequate space on the level above <br /> the slope for maintenance, grading and shaping. If option 2 is <br /> used then there will be no setback along the east side where <br /> the mines adjoin. The mine floor will slope towards the north <br /> to preserve the drainage flow characteristics of land. <br /> Typically mining at Walsenburg Sand and Gravel Companies <br /> mining operations are done in cycles . These cycles involve <br /> moving a crushing plant into a mine and beginning to process <br /> material until there is a 6 month to 1 year supply of rock <br /> stockpiled. Once an adequate supply is processed the crusher <br /> and equipment are moved to another mine. The stockpiles will <br /> be used throughout the year by the company. As mining ends the <br /> working face is temporally graded to 2 : 1 so it is stable when <br /> there are no activities in the mine. Any resoiling and <br /> revegetation needed is completed when the area where material <br /> is removed will not be redisturbed. This cycle continues until <br /> the mine is played out . Walsenburg S&G contracts for mining <br /> and processing of gravel at the mine and does their own load <br /> out and hauling. <br /> Each time the mine is re-enter mining begins by setting up <br /> the plant and stripping the area to be mined during this cycle. <br /> The topsoil and overburden will be stockpiled along the mine <br /> perimeter setbacks or on the mine floor, i.e. in places where <br /> it will not be disturbed until needed. The approximate loca- <br /> tion of the overburden and topsoil piles are shown on the <br /> Mining Plan Map. <br /> Mining will begin on a section of the slopes created at <br /> the end of the last mining cycle until a near vertical face is <br /> open. This face will be worked to the east in the existing <br /> face until the eastern mining boundary is reached. As mining <br /> progresses thru the site the processing plant will be set near <br /> the open face to reduce the haul distance from the mine face. <br /> So the stockpile and plant site area will move as the mine face <br /> advances to the east . <br /> This pit will be operated year-around by Walsenburg Sand <br /> and Gravel, CO. , weather permitting. There may be periods when <br /> the demands for material are slow and no mining will take place <br /> at which time the mine will become an Intermediate Operation. <br /> WSG- Hribnr Pit Amendment 11 November 2020 <br />