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-60- XXIII. Subsidence -Rules 2.05.6(6) and 4.20 Information on subsidence and a subsidence control and subsidence monitoring plan can be found in Volume I, pages 2.05-45 through 2.05-48, Volume II, Exhibit 21, and Volume IV, Maps 17 and 18. These sections of the application have been reviewed by the Division for compliance with the Regulations. The applicant has failed to present adequate hydrologic infornation concerning the renewable resource land designation of alluvial aquifer areas within Apache Canyon, and Left Fork of Apache Canyon. As discussed in Section V, "Hydrologic Balance: Surface Water" and Section VI, "Hydrologic Balance: Ground Water", the applicant must provide sufficient information to demonstrate that the proposed secondary or retreat mining plan will prevent material damage to the affected renewable resource lands. Submission of this information is stipulated within Section V and VI of this findings document. The description of mining methods which to verify the 50% projected support the overlying overburden, reason, the following stipulation 2.05.6(6((f)(ii). or pillar and entry configurations with extraction limit and pillars' capability to must be submitted to the Division. For this is necessary in order to comply with Rule Stipulation No. 30: THE PERMITTEE MUST COMPLETE PILLAR STABILITY CALCULATIONS FUR THE 50X PROJECTED EXTRACTION LIMIT CONFIGURATION CONTAINED WITHIN THE APPLICATION. THESE ANALYTICAL CALCULATIONS, PREPARED IN ACCORDANCE WITH AN ANALYTICAL METHOD ACCEPTABLE TO THE DIVISION, SHALL BE SUBMITTED TO THE DIVISION FOR REVIEW WITHIN 60 DAYS FOLLOWING PERMIT ISSUANCE. Four structures, an overhead powerline, a railroad spur, a buried telephone cable, and the Purgatoire River and it's associated alluvial aquifer, exist within the permit area. The applicant will visually monitor these structures to discern potential effects of subsidence on a quarterly basis. Visual monitoring will be performed along those portions of the structures that lie within the areas defined by an angle of draw of 300 (measured from vertical), projected from the coal seam to the ground surface. With the acceptance of the above stipulation, the proposed operation is found to be in compliance with the requirements of Rules 2.05.6(6) and 4.20. XXIV. Special Categories of Mini The requirements of this section do not apply to this operation, since none of the special categories of mining will be conducted. XXV. Miscellaneous Compliance - Rules 2.05.6(5), 4.02, 4.12, 4.19, 4.21, 4.28 ~~3 No problems were identified with respect to the requirements of these sections during the review. Based on information provided in Vol. I of the application, the operation is in compliance with all the requirements of the above sections.