2013-09-26_REVISION - M2009027 - Laserfiche WebLink

Home Browse Search

MINING PLAN EXHIBIT D (CONT) The method of mining discussed below will fit each option unless other wise stated. Please use the RECLAMATION PLAN MAPS during review of the following text for the areas discussed. They show how the site would look depending on what option is used. Mining began on the northern end of the site and will continue as shown on the Mining Plan Map. The floor of Plant Site /stockpile area is on bedrock so it is on the final level to be mined and covers approximately 11.0 acres. The plan is to continue to mine into the gravel deposit working south and west until the permit limits are reached. A 15 -foot digline setback will be maintained from the permit boundary so there is adequate space on the level above the slope for maintenance, grading and shaping. If option 2 or 3 are used then there will be no setback along the sides where the mines adjoin. The mine floor will slope towards the north to preserve the flow characteristics of land. Typically mining at Walsenburg Sand and Gravel'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 6 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 through- out the year by the company. As mining ends the working face 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. Walsenburg Sand and Gravel contracts for mining and processing of gravel at the mine and does their own load out and hauling. 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 perimeter setbacks or on the mine floor, i.e. in places where it will not be disturbed until needed. The approximate location of the overburden and topsoil piles are shown on the MINING PLAN MAP. Mining will begin on a section of the slopes created at the end of the last mining cycle until a near vertical face is open. This face will be worked to the east and west until it extends across the property and at that time mining will progress to the south. As mining progresses thru the site the processing plant 0