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. 2.05.3(2) Utilizing the portals of the abandoned Edwards Mine has increased recovery of reserves and caused minimal additional surface disturbance. The main entries are oriented perpendicular to the seam outcrop with the panels oriented parallel or perpendicular to the property boundaries. This orientation, as shown on the Mine Plan Maps (Maps 9 & 9A) provides for the optimum recovery of reserves. The main entries run parallel to one another and are separated by blocks of coal called pillars. The entries begin with a limited number or portal entries then expand to a 5, 6 or 7 main entry system, in order to improve mining and ventilation. The main pillars which separate these entries are designed to provide support over the life of the mining of the C and B-Seam; they are typically on 70-foot centers. The width on the mine openings will be kept at approximately 18 to 20-feet throughout the mining operation. The main entries serve as the lifeline of the mining operation providing access for supplies, water piping, haulage, power, ventilation and support services. • Mining panels are developed blocks of coal which can be mined by room and pillar techniques utilizing continuous miners. The panels are located adjacent to the main entries and are oriented perpendicular or parallel to the mine property boundaries. Before pillar extraction can begin, the mining panel is typically completely developed on each side by panel and bleeder entries. The projected dimensions of the mining panels varies. Economic and physical considerations have determined the orientation of the proposed panels. All mining panels are recovered in a retreating fashion once they are developed. Panels will be mined in sequence as designated on the B-Seam Mine Plan Map (Map 9A) 2.05-Sb Rev. 11-30-93