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6.4.4 EXHIBIT D -MINING PLAN <br />existing sediment pond across the river at the Brownwood Pit. A drainage ditch <br />occurs down the western side of Cell D. This ditch will be diverted, to avoid <br />capturing flow during mining of Cell D, to the eastern perimeter of Cell D. <br />Timetable and Size of Mining Areas <br />The mining operation is expected to last for 3 years, however this could vary <br />depending upon market conditions. The approximate size of areas to be worked <br />at any one time correlates to the size of the mining Cells. Table 6.4.4-2 shows <br />the mining Celi size and the approximate timetable for working each Ceil. <br />Table 6.4.4-2. Mining Timetable <br />MINING CELL APPROXIMATE AREA 70 <br />BE WORKED AT ANY ONE <br />TIME [acres] APPROXIMATE <br />TIMETABLE <br />CELL A 2.4 Year 1 <br />CELL B 4,0 Year 1 <br />CELL C 6,4 Year 2 <br />CELL D 11.1 Year 3 <br />Nature of the Deposit <br />The overburden occurs at a thickness from 4-12 ft and is composed of sand silt <br />(ML) silty sand (SM) and some sandy and silty clay (CL). Sand and Gravel <br />occurs at a thickness of 10-15 ft. Directly beneath the sand and gravel is a a <br />weathered zone of shale occurring at a thickness of 3-6 ft under which is the un- <br />weathered Pierre shale. <br />Commodities <br />The primary commodity is sand and gravel to be used for the construction <br />industry. The are no incidental commodities. <br />Explosives <br />No explosives will be used for the mining operation. <br />Gardels Pit <br />Regular 112 Permit Application <br />