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~ • • <br />' As mined, the material will be processed through a portable screen deck operating within the disturbed <br />parrzl area. Screened materials will be stockpiled separate and be transported from the stockpile as <br />necessary. Graded stockpile and screen deck locations will vary within the permit area as the mining <br />plan progresses. Once an area has been graded and reseeded for final reclamation, it will not be used <br />for mining, screening, or stockpiling. This process will establish final configuration of a gently <br />sloping (104'0) pit floor which readily transitions into a lower (33'0) pit floor and to the undisturbed <br />' natural areas on the east side. A 3H:1 V slope on the west and south sides will minimize potential <br />erosion damage and is compatible with both existing contours and imended future use of rangeland. <br />' It is expected that average annual consumption rates will be approximately 75,000 tons per year. This <br />figure is influenced by market demand and could be more or less. Using this average and the <br />anticipated quantity of gravel, the life expectancy of this mine is estimated to be ten years. Actual <br />' completion time being dependent on sales, the permit is requested for the life of the mine. Beginning <br />date of operation is estimated to be the Fourth quarter of 1993 depending on the necessary permits <br />required to commence extraction. <br />' Mining operations will be limited to daylight hours between 7:00 A.M. and 6:00 P.M. , 6 days per <br /> week (Monday-Saturday). Limited market demands may require shorter workdays or working weeks. <br /> Weather permitting, operations may occur to some extent during any or all months of the yeaz. Night <br />' operations will not be allowed. The estimated tithe table for each phase ranges from 2 [0 4 years. <br /> The time table for each phase will overlap due to reclamation occurring in one area and mitring in an <br />' adjacent area. <br /> The mitring operation will require a staffing of 2 to 5 employees to operate scales, loader, dozer and <br />t screening equipment. Additional employees will be required on a random or part time basis to operate <br />a water truck, used for dust abatement, and the diesel service truck. Hauling may be accomplished by <br /> independent contractors, the operator and/or government entities. <br />' Major equipment will consist of a dozer, front end loader and screening plant for the actual mining <br /> operations. Haul traffic will consist of tandem frocks (10 - 12 yard loads) or semi trailers (20 yard <br /> loads). Temporary scales will be installed along the southeast side of the pit access road in the flatIer <br />' areas at the northwest comer of the lower sedimentation pond. This will allow haul [tucks convetrient <br /> access to the scales while confining equipment and operations to the secured permitted areas. Haul <br /> traffic will operate according to applicable state and local regulations. <br /> i <br />l th <br />h <br /> a <br />roug <br />The screening plant is a portable (towed) conveyor bel[ system that accepts excavated mater <br /> a hopper bin, lifts the material to the upper vibratory screen which separates course material from fine <br /> material. Graded material gradation is dropped dvectly to the ground for stock piling and later <br />' transferred to the haul tnucks by the front end loader. The vibrating screens are equipped with water <br /> spray jets to mirrirnize dust accumulation. A single 30 HP diesel engine plant drives the wnveyor <br /> belts and the vibratory screens. Typical overall dimensions of the operating plant are 8ft. wide by 54 <br />t feet long by 18 feet high. The dozer, loader and screen plant will be located only in the pit area (in <br /> the current mining phase) and are expected to be moved within the pit area w facilitate excavation and <br /> stock piling operations. The dozer is a 75 HP diesel engine of the mid-size (D-7) range and will be <br />' used intermittently, during each mining phase, to facilitate firtal contouring and shaping and stockpile <br /> manipulation. The loader is a diesel engine (typical 5 cubic yard bucket) and is the primary <br /> excavation and loading equipment. The scales are skid mounted, approximately 9 feet wide by 60 <br />fee[ long and 2 feet high, and will remain in place during the life of the pit. A 10' by 10' skid <br /> mounted, prefabricated scales office will be located at the scales. This office will house the <br />' mecharrical indicator for the scale readings and serve as the on-site office for haul and weight <br />' D-2 <br />