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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. STATUS: Tetminated May 28, 1992. Sti~lation No. 12 The Division directs MCC to complete the installation of the subsidence monitoring network prior to the initiation of extraction of coal within the panel designated in appendix A to the November 1984 permit revision application entitled "Application to Revise the Mining and Reclamation Plan for the Mount Gunnison No. 1 Underground Mine." This monitoring network is designed to monitor the first panel west from the SW mains intakes and south of the No. 1 west submains, designated as "panel 1 W-1S," located adjacent to and parallel to the western boundary of Section 21, Range 90W, Township 13S. This monitoring network shall consist of substantial monuments designed to resist frost-heave, fue, and the actions of cattle and wildlife. STATVS: Complied with. Stinulation No. 13 The subsidence monitoring network shall be surveyed utilizing conventional ground surveying techniques, designed to achieve horizontal accuracies complying with the U.S. Department of Commerce's "Second Cider, Class II" survey standazds, and vertical accuracies no less than +/_ 0.2 feet. This gid shall be surveyed twice prior to the initiation of subsidence. In conjunction with these surveys, MCC shall select and establish a minimum of six triangulation bench mazk monuments outside the azea of anticipated subsidence effects, for the purpose of correlation with aerial photogrammetric post-subsidence surveys. STATUS: Terminated December 11, 1992. Stipulation No. 14 MCC has requested permission to complete apre-subsidence aerial photogrammetric survey of the subsidence monitoring grid, for the purpose of correlation with the field survey results. It is MCC's intention to utilize aerial photogramtnetric methodology to monitor post-subsidence movements of the subsidence monuments. The results of the pre-subsidence field and aerial photogrammetricsorveys shall be compazed for each grid monument. The aerial survey will be accepted as accurate and will be used for subsequent post-subsidence monitoring, in the event that the aerial photogrammetric and field surveys correlate with an average survey point location deviation of less than 0.2 feet vertically and horizontally, with survey point location deviations of less than 0.4 feet vertically and horizontally for less than 95% of the survey points, and with no single survey point location deviation vertically or horizontally in excess of 0.8 feet. STATUS: Forgiven S[~i ulation No. 15 MCC has requested permission to complete aerial photogrammetric surveys of the subsidence monitoring grid subsequent to the initiation of subsidence, for the purpose of monitoring subsidence monument movements. The accuracy of the aerial photogammetric surveys shall be determined by a comparison of triangulation bench mazk monument field and aerial photogrammetric survey results following each semi- annual survey. The results of each aerial phatogrammettic survey shall be accepted as accurate, in the event that the aerial photogramme[ric and most recent annual triangulation monument field survey results correlate with an average triangulation monument location deviation of less than 0.2 feet vertically and horizontally, with triangulation monument location deviations of less than 0.4 feet vertically and horizontally for less than 83% of the triangulation monuments, and with no single triangulation point location deviation vertically or horizontally in excess of 0.8 feet.