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11. Compliance_ with Colorado Surface Coal Mining Reclamation Act (Cont'd) <br /> and pond 007. The MK Pond requires the most cleaning. <br /> 4.10 and 4.11 Coal Processing Waste <br /> A buffer zone of approximately 20 feet must be maintained between the trammel <br /> screen waste piles and the edge of the mine pads. This is particularly important on <br /> the mine no. 1 and no. 3 pads. <br />