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Rule ?.OS <br />• Table 2.05-1 presents a general summary of the mining and reclamation activities over the life <br />of the mine permit. <br />TABLE 2.05-1 <br />MINING & RECLAMATION SEO.UENCE <br />Phase Dates AMivity <br />Initial 3/78 to 6/78 Construction of mine support facilities <br />Block B <br />Development 8/78 to 6/79 Topsoil removal from initial mine cut & spoil pile <br />area <br /> 12/78 to 1982 Overburden removal & dump construction <br />(7,500,000 c.u. yds. placed in dump) <br />Block B Mining 1982 to 1986 Overburden removal, backfilling & grading <br />Phase 1 Reclamation 1982 to 1986 Concurrent backfilling & rough grading <br />Phase 2 Reclamation 1986 Final grading, topsoil replacement & revegetation of <br />mine pit area <br />Phase 3 Reclamation 1987 Mine facilities area final reclamation & mine <br />reclamation maintenance <br />Phase 4 Reclamation 1987 to 1994 Monitoring, maintenance & minor repairs <br />In general, mining progressed from the north to south using an area strip mining method. The <br />five coal seams mined were on separate benches such that more than one seam could be mined <br />• at a time. During the life of the mine, the highwal] advanced toward the east and south. <br />Overburden was removed by breaking and hauling material from the pit with twin engine <br />scrapers, a hydraulic excavator and 50 ton rear dump trucks. Rubbilization resulted in angular <br />fragments of rock, making it impossible to restore the material to restore the material to i[s <br />original laminar nature. Disposal of excess overburden required development of a spoil pile <br />northeast of the pit area; part of which was left as a permanent spoil pilex in accordance with <br />the approved reclamation plan. <br />The sequence of mining aas based on maintaining a constant stripping ratio. In order to <br />maintain a balanced stripping ratio, a minimum of two cuts must be mined simultaneously. <br />This technique allows for pre-stripping high ratio cuts when coal production is from low <br />ratio areas, and allows for blending and recovery of [he lower quality coal seams which by <br />themselves could not meet minimum quality standards. <br />Approximate annual coal production over the mine life was: <br />~~ <br />Year Tons Produced <br />1979 381,955 <br />1980 554,490 <br />1981 847.167 <br />1982 583,188 <br />1983 454,842 <br />1984 439,595 <br />1985 500,000' <br />1986 500.000' <br />TOTAL @4,200,000 <br />Production rates projected in 1985 <br />H:\BJJ~PE RM rr\RULE3-05. HG <br />rvzciss ::~oPm mrs v~m~ 2.05-2 Revised - 11/28/95 <br />