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• i 2-, ~ <br />11 feet thick, the interval mined will normally be in the upper portion if the seam. <br />Deviation from this plan will only be done after consultation with and approval from the <br />I <br />BLM. One possible exception to mining top coal may be bottom mining in thick seam <br />areas where safety considerations make pillar recovery impossible. The competency of <br />both the roof and the coal must be adequate to maintain the entry co figuration while <br />mining is occurring. In seam heights less than 11 feet, full seam thickness will be <br />mined where conditions permit. <br />2.1.6.3 Burn Exclusion Zones <br />In those areas where burned coal is known to exist at the outcrop, a 500 foot <br />burn exclusion zone will be adopted. The use of this zone is to ensure that no active <br />burn areas will be intersected with the mine workings. Active burn is i nown to exist in <br />portions of the Bookcliffs coal field. Specific areas of active burn within the mine plan <br />area have not been identified. <br />Based upon evidence that no active burn exists, specific areas of the mine may <br />i <br />mine closer to the outcrop. Reserve estimates contained within this plan consistently <br />'2 -! <br />exclude the burn zone, but as can be seen on Figure 2 1, panels have been designed <br />to allow mining this area if conditions permit. The decision to mine cl ser will be made <br />on a panel by panel basis. <br />M`Clane Volume 1 ~ 12/99 <br />