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• EXHIBIT D MINING PLAN nnnnnn LlS6/I /. The following is a general description of the Mining Plan to be used by Custer County in the operation of y,JE ~ this gravel Pit by the Custer County Highway Depanment. 1C3~ •~~ The forty_(40) acre area is divided into four (4 a oximately ten (10) ac^ re plots. The area will be mined j in phases corresponding`to tTie plots asindicated on the "Mining lan Map". Mining wil! be of the open pit type. The first Phase area will be striped of overburden and the topsoil piled on [he west border labeled on the map "Overburden Stockpile". It is estimated that a roximately six (6) inches of topsoil will have to be removed to get down to the gravel laver Vegetable matt~ll H ~/;r'•"~ remain with the topsoil. t 5 0~ 7 \" Proper grading and care will be taken on a continuous basis for [he prevention of erosion at the site. 1J i,~ls ~tN~ l ,~~5 ~, u~ bt~'~,: ,,c~ V~~~ X41 A road currently exists along the east flank of the site and is used for the Custer County Landfill access. This road will be used to haul in and out of [he site. A road to the First Phase area is indicated on the "Mining Plan Map". There is a small amount of clay material at the site and will be used as binder for local gravel roads. Any clay found will be temporarily stored in [he area titled "Clay Stockpile" on the map. Additional amounts of clay will be needed to be obtained from other locations to meet Custer County needs. The larger boulders and cobbles will be stored in the area shown on the "Mining Plan Map" titled "Oversize Stockpile". The County estimates a maximum gravel useage of 30,000 Tons per year. The Sand and Gravel will be screened, crashed, sorted and piled in the azea labeled "Gravel Stockpile" on an as needed basis. [ndi~~dual stockpiles to be kept at a maximum of 5,000 Tons each. Normal equipment for such operations will be used: a bulldozer, a front end loader, a backhce and several dump trucks. A crusher and screens will also be used. No blasting will be required at the site. The gravel exists in a layer approximately twelve (12) feet thick and is easily mined with a dozer and front end loader. Once an area has been mined it will be graded, the topsoil restored and that area reseeded according to the "Reclamation Plan". The mining will progress with the reclamation of an area already mined cecuring behind it. The topsoil removed from [he next phase will be used on the area already mined. Any unreclaimed area will never exceed ten (IO) acres in size at one time. Final grading will be according to the "Final Reclamation Plan Map".