1992-12-16_GENERAL DOCUMENTS - C1980007

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OR APPROPRIATELY AMEND, THE FINDINGS OF THE RECONNAISSANCE GEOLOGIC MAPPING OF THE ROADWAY CORRIDOR. FURTHER, MOUNTAIN 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. STATUS: Terminated Stipulation 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 MT. 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 1W-1S, " LOCATED ADJACENT TO AND PARALLEL TO THE WESTERN BOUNDARY OF SECTION 21 , RANGE 90W, TOWNSHIP 135. THIS MONITORING NETWORK SHALL CONSIST OF SUBSTANTIAL MONUMENTS DESIGNED TO RESIST FROST-HEAVE, FIRE, AND THE ACTIONS OF CATTLE AND WILDLIFE. STATUS: Complied With Stipulation 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 ORDER, CLASS II" SURVEY STANDARDS, AND VERTICAL ACCURACIES NO LESS THAN +0.2 FEET. THIS GRID 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 MARK MONUMENTS OUTSIDE THE AREA OF ANTICIPATED SUBSIDENCE EFFECTS, FOR THE PURPOSE OF CORRELATION WITH AERIAL PHOTOGRAMMETRIC POST-SUBSIDENCE SURVEYS. STATUS: Terminated Stipulation No. 14 MCC HAS REQUESTED PERMISSION TO COMPLETE A PRE-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 PHOTOGRAMMETRIC METHODOLOGY TO MONITOR POST-SUBSIDENCE MOVEMENTS OF THE SUBSIDENCE MONUMENTS. THE RESULTS OF THE PRE-SUBSIDENCE FIELD AND AERIAL PHOTOGRAMMETRIC SURVEYS SHALL BE COMPARED 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 -6-