2015-04-30_REVISION - M2006085 - Laserfiche WebLink

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MINING PLAN EXHIBIT D (CONT) The plan to keep the plant site and stockpile area close by the working face to reduce raw material haul distances and keep all disturbance in and around the processing area. The overbur- den screened from the material will then be placed on the previ- ously mined areal, topsoil and seeded as mining progresses thru the property. j Originally it was estimated that mine would last approxi- mately 27 years but due to the demand for material and the amount of minable material it has only been 9 years. By adding this new area we expect to extend the mines life for an additional 23 years ±. 1 Please refer to the Mining Timetable following this text for the areas in the mine and the revised estimate on the life of the mine. } CHANGES TO MINING PLAN The following changes are a result of the site specific conditions found Ion the Biber property but have no effect on area remaining to be mined on the Howell property. The depth of the deposit on the amendment area is different then that found in the Existing permit. In this area it ranges from 5 feet to possibly 35 feet deep, along the upland deposit. No groundwater will be encountered on this area as the final area will be graded to preserve the natural drainage across the site. This mine will be a year round operation with no planned extended shutdowns. However, depending on the demand for material and market conditions, the mine may bey operated on an intermittent status. It is proposed to use a floating bond on 20 acres on this operation. Reclamation will run concurrent with mining so on any given area, when Imining begins reclamation will follow immedi- ately to keep the amount of area disturbed at anyone time to the maximum proposed It is planned that it will take approximately three to four years after mining commences on the Biber property before reclamation begins. Reclamation will be completed on the last area mined on the Howell property when the mining operation is moved to the north end of the Biber property. It will then take between 3 to 5 years to establish the reclaimed area back to rangeland that may be considered for release by the Mined Land Reclamation Board or the Division of Reclamation, Mining & Safety. The reclamation will be an ongoing process as soon as the first section is deemed mined -out, and mining and reclamation will follows natural progression to the south with final reclamation as the ultimate goal. The amount of 5