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-58- FURTHER, WEST ELK COAL COMPANY, UTILIZING THE FINDINGS OF THE FINAL GEOTECHNICAL INVESTIGATION, SHALL COMPLETE A FINAL ENGINEERED CUT-SLOPE AND DRAINAGE DESIGN FOR THE UPPER WASTE PILE ACCESS ROAD. THIS FINAL DESIGN SHALL BE APPROVED BY THE DIVISION, IN WRITING, AND THE CONSTRUCTION COMPLETED IN ACCORDANCE WITH THAT DESIGN, PRIOR TO THE TRANSPORTATION OF ANY WASTE MATERIAL ALONG THAT ACCESS ROAD. XXI. Bonding (2.05.4(2)(b) The reclamation costs section of the permit application, found on pages 4-34a through j of Volume 1, has been reviewed by the Division. All problems concerning the reclamation cost estimates that were raised in the February 6, 1981 Preliminary Adequacy Review have been satisfactorily resolved and the proposed operation is in compliance. The total cast for reclaiming the proposed operation including the upper waste disposal pile has been calculated by WECC to be b4,106,639.00. XXII. Sealing of Drilled Holes and Underground Openings (2.05.4 Information demonstrating compliance with the above mentioned rules can be found in Volume 1, section 3 and 4. The operation is in compliance. XXIII. Subsidence (2.05.6(6). 4.20 The original permit application submitted by WECC for the Mt. Gunnison No. 1 coal mine contained a one page narrative treatment (page 3-93) of subsidence and a map exhibit 3.4.8.A indicating a proposed subsidence monitoring program. The Division expressed major concern with this inadequate response and requested that WECC prepare and submit a subsidence evaluation which properly addressed the requirements of Rule 2.05.6(6). WECC prepared, submitted and subsequently revised a report entitled "Subsidence Evaluation for Mt. Gunnison No. 1 Mine", prepared by WECC's Mine Engineering Staff and included as exhibit 3.4.8.A within the amended permit application. As a portion of its November, 1984, "Application to Revise the Mining and Reclamation Plan for the Mt. Gunnison No. 1 Mine", WECC submitted a revised subsidence monitoring plan. WECC states in the application that the requested 320 acre permit area expansion "...is, in part, to accommodate a revision to the underground mining sequence necessitated by geologic conditions encountered during mining which required that the mains be relocated". Further, the requested area expansion will allow the relocation of the required subsidence test panel. WECC observes, and the Division concurs, "Relocating the 5-year permit boundary westward will permit a 400 foot barrier pillar width (adjoining the mains) and a subsidence test panel in excess of 500 feet. The wider barrier pillar will reduce the possibility of overriding loading on the life-of-mine mains being developed in the area."