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The effect of mining-induced subsidence on renewable resources, strucmres, and <br />geologically unstable areas in the five-year permit term is discussed in a report <br />entitled, "Subsidence Evaluation for the West Elk Mine" and can be found in <br />Exhibit 55. <br />2. The applicant has proposed a subsidence monitoring program, in accordance with <br />Rule 2.05.6(6)(c), designed to determine the commencement and magnitude of <br />subsidence movements. Map 29 depicts the location of monuments installed and <br />structures to be monitored within the permit and adjacent area. The results of the <br />monitoring program will be submitted to the Division semiannually. The <br />monitoring program is designed to extend for a time, beyond cessation of mining <br />in any area, consistent with the need for verification of the subsidence prediction. <br />MCC has extended the subsidence monitoring network to include Jumbo <br />Mountain and the Apache Rocks revision areas. The location of the monuments <br />is shown on an Addendum to Exhibit 60. In addition, MCC will establish and <br />survey an aerial photo control point grid, complete aerial photography of the <br />mine plan area, and then use pho[ogrammetric methods to measure subsidence. <br />MCC will verify the effectiveness of this methods by continuing the conventional <br />survey of the existing grid and of the decreed water rights on Jumbo Mountain to <br />be under mined. If aerial photogramme[ry is successful, MCC will then submit a <br />revision [o eliminate surveying by traditional methods. <br />In addition to providing subsidence survey data, the aerial photos from the fall <br />photogrammetric survey will be utilized to map the numerous, small landslide <br />bodies on the north face of Jumbo Mountain. This mapping will provide a <br />broader, more extensive view from which to associate or assess landslide activity <br />due to mining. <br />An evaluation of [he F Seam subsidence monitoring program is provided in <br />Exhibit 60 (Volume 13). The evaluation includes an analysis of the survey data <br />obtained from the F Seam monitoring network to date, correlation with industry <br />subsidence protection models, and summary of subsidence parameters observed <br />for the F Seam. Predictions of subsidence from proposed mining in the B Seam <br />are included and are based on data and evaluations of the F Seam subsidence and <br />current industry data. <br />XVI. Concurrent Surface and Underground Mining <br />I. This section does not apply to the West Elk Mine. <br />53 <br />