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<br />NOLAIdD GULCH PIT <br />EXHIBIT D <br />Mining Plan <br /> <br />The Saguact~e County Road and Bridge Department is planning expansion of an <br />existing saind and gravel pit as a long term primary source for the north and <br />east sides of the County. Mining will be from two existing adjacent pits. <br />I. The I~~wer pit in the north 2nd of the seventy (701 acre operation area <br />contains lenses of dirt, sand and gravel, and cobble stone. Use here will <br />be of all three materials as pit run or after enhancement by screening <br />and/or crushing. Asphalt will also be produced on site. 1•tining will <br />occur in two stages, Stage one on the east and Stage two on the west. <br />Stage one will be completed before stage two is started. Due to high <br />plasticity of the fines, three quarter minus materials may have to be <br />screened off when asphalt materials are crushed. This would create a very <br />large volume of dirt road surfacing material that would remain in low <br />stockpiles for a long period of time before it is used. ?lining of these <br />materials should occur for twenty-five (25) years based on estimates of <br />annuail usage. It is estimated that active mining will take place less /~ <br />than 180 days per year. The materials extend to considerable depth and <br />will be mined no greater than thirty (30) feet deep. <br />Top roil/subsoil stockpiles will be located on a one hundred (100) foot <br />strip of the operation area on the north side of the lower pit. Stage two <br />stockpile will not be built until Stage one is reclaimed. These <br />stockpiles shall not exceed a height of twelve (12) feet to lessen visual <br />impacts. <br />II. The upper pit is in the south part of the operation area and contains <br />twenty l20) to thirty (30) feet of decomposed granite mixed with high <br />plasticity dirt. This layer is a homogenous mix of 1/2 inch minus <br />material. The lower layer has lenses of clean sand, pea gravel and cobble <br />stone. The top layer xill be used for road surfacing and the lower layer <br />may be used for concrete, road base, screening, or crushing. Mining will <br />occur in three stages. Stage one will be north of the access road and <br />Stages two and three will be south of the access road. Mining and <br />rec:Lamation will proceed from Stage one thorough Stage three. However, <br />suc~:essive stages of the top decomposed granite may be mined before the <br />pr2ceeding stage is reclaimed since the deeper clean sand and gravel will <br />be mined separately. Then each stage will be reclaimed before the next <br />stage is mined. Mining of these materials should occur for forty (401 <br />years based on estimates of annual usage. It is estimated that active <br />mining will take place less than 180 days per year. The materials extend <br />to considerable depth and will be mined no greater than fifty (50) feet <br />deep. <br />Top soil/subsoil stockpiles will be located in one hundred (100) foot <br />strips along the north and south sides of the access road and along the <br />ea::t side of the upper pit. <br />Op+arations will be conducted with a crawler-doter equipped with a ripper <br />when the ground is frozen. a rubber tire loader will be used year round <br />to dig, stocY,pile, and load material. <br />-8- <br />