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• <br />MINING PLAN <br />EXHIBIT C <br />1. General Plan <br />Prior to any mining operations, the sediment control system will be installed, which consists of a 1.5 <br />ft high berm on the west side of the property, a 1.5 feet deep ditch on the north and south sides of <br />the property which leads to a sediment sump on the low point of the property on the east. The berm <br />will prevent undisturbed runoff from entering the site and the sump is designed to contain the runoff <br />from the 100 year - 24 hour event. These facilities are described in more detail in the subsection ti- <br />tled drainage facilities. All of the above facilities are shown on Map E-1 Mine Plan. <br />As shown on Map E-1, the plan of operation is [o initially strip the topsoil from the mining area of <br />Phase 1, which is approximately 3.0 acres. This material is expected to average 5 inches in thick- <br />ness, therefore the volume to be moved is 54,432 cubic fee[. The topsoil pile area allocated is 0.16 <br />acres and the average height of the stockpile is 7.8 feet. No slopes will exceed 2.OH:1.OV. The top- <br />soil pile will be temporarily seeded with the same mix described later in the reclamation plan. <br />The subsoil will be subsequently stripped from the same 3.0 acre area. The expected thickness is 1.0 <br />feet, therefore, the total volume is 130,680 cubic feet. The stockpile area allocated is 0.25 acres, <br />therefore, the average height of the of the pile is 12.0 feet. No slopes will exceed 2.OH:1.OV. Both <br />stockpile areas are placed within the drainage ditch so that all mnoff from these areas must drain to <br />the sediment pond. A Cat D-8 or D-9 dozer is expected to perform the stripping and stockpiling. <br />Once these activities are completed, the mining of the gravel deposit will begin. A D-8 or D-9 dozer <br />and/or Cat type 988 loader will be used to excavate the gravel. It is possible that a track backhoe or <br />track loader may also be used in the material excavation. The gravel zone is approximately 11 feet <br />thick, therefore the total material in the 3.0 acre area is 1,437,480 cubic feet or 97,030 tons. The <br />maximum annual mined tonnage rate for the pit is 30,000 tons, therefore, the Phase 1 area will last <br />3.2 years, assuming the maximum rate is sold each year. The mining of Phase 1 will leave <br />2.OH:1.OV sideslopes on all final outside slopes down to the mining depth of 12 feet. These slopes <br />are relatively mild and will not present a problem in revegetation. <br />Ferrero Pit 2/00 16 <br />