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cover amounted to about 4 feet to 6 feet. Topsoil depth of cover was from 8 inches up to 1 foot 6 inches. The operation is in compliance with the requirements of this section. V. Sealing of Drilled Holes and Underground Openings -Rule 4.07 Information describing sealing of the Bowie No. 1 Mine portals and well holes is found in the approved permit application, Volume lA, Section 2.05.4(2)(g) and in Volume 6, Figure 2.05.6. The operator has committed to sealing of entries and shafts in accordance with the requirements of Rule 4.05.10 and 4.07.1-4. Vl. Use of Explosives -Rule 4.08 The Bowie No. 1 Mine is an existing underground operation. No regular surface blasting occurs. An explosives storage bunker and cap house are located above the main facilities fan area. No underground use of explosives is anticipated because of the temporary cessation of underground mining. The operation is in compliance with all requirements related to explosives use. VII. Disposal of Excess Spoil -Rule 4.09 Disposal of excess spoil will not occur at the Bowie No. 1 Mine. V[II. Coal Mine Waste Banks -Rule 4.10 The Bowie No. 1 Mine has two coal waste disposal sites. The first disposal site, named the old waste disposal area, is situated just northwest of Pond 2 and was begun in September of 1978. Placement of coal waste continued until the disposal site reached full capacity. The disposal site was reclaimed in August of 1983. [n 1985, a spontaneous combustion event took place at the old waste disposal area. Final resolution of the issue occurred when the problem coal waste was excavated from the disposal site, allowed to cool, and placed at the second waste disposal site, named the West Ridge waste disposal site. The applicant, in response to Stipulation No. 16 of its original Permit No. C-038-81, obtained approval for an underground development waste pile (West Ridge waste disposal site) at the Bowie No. 1 Mine. Designs and text regarding the waste pile can be found in the approved permit application, Volume lA, Section 2.05.3(9), and Volume 6A. Briefly, the plan consists of three phases. Phase I consists of a waste pile to be constructed on the "West Ridge" site, immediately adjoining the southwestern toe of the lowest existing fill bench at the Bowie No. 1 Mine surface facilities. This terraced pile is proposed to accommodate 130,000 cubic yazds of waste and fulfill the mine's waste disposal requirements for a period of 8.8 years. In January 1988, 64,417 tons of waste had been disposed of at the West Ridge site. Approximately 25,000 tons were added to the pile in 1987, due to development in the West Mine area. Phase II consists of an analogous, but smaller, waste pile to be constructed on the "East Ridge" site, immediately east of the Phase I pile. Phase II will contain 60,500 cubic yards of waste and 30