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-5- COLLETED BY APPROPRIATELY QUALIFIED PROFESSIONAL GEOLOGICAL OR ENGINEERING PERSONNEL. THE PURPOSE OF THIS FINAL INVESTIGATION SHALL BE TO VERIFY, OR APPROPRIATELY AMEND, THE FINDINGS OF THE RECONNAISSANCE GEOLOGIC MAPPING OF THE ROADWP.Y CORRIDOR. FURTHER, WEST ELK SAL COLANY, 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 COLLETED IN ACCORDANCE WITH THAT DESIGN, PRIOR `IO THE TRANSPORTATION OF ANY WASTE MATERIAL ALONG THAT ACCESS ROAD. Stipulation No. 17 ,~ ~ ~~ WECC MUST SUBMIT ADDITIONAL BOND, IN THE AMOUNTS DESCRIBED IN THE LOWER WASTE PILE PERMIT REVISION APPLICATION, AT LEAST THIRTY (30) DAYS PRIOR TO THE CONAIENCEMENT OF CONSTRUCTION OF PHASES III, IV, and V OF THE LpWER WASTE PILE. THESE ADDITIONAL BONDS MUST BE APPROVED AND ACCEPTED BY THE DIVISION PRIORR TO CONSTRUCTION FOR THESE PHASES. ~9tipulation No. 18 ,~ ~7- THE DIVISION DIRECTS WECC TO COLLETS THE INSTALLATION OF THE SUBSIDENCE MONITORING NETWORK PRIOR TO THE INITIATION OF EXTRACTION OF COAL WITHIN THE PANEL DESIGNATED IN APPENDIX A TO THE NGVEhIBER, 1984 PERMIT REVISION APPLICATION ENTITLED "APPLICATION TO REVISE THE hIINING AND RECLAMATION PLAN FOR THE h1T. GUNNISON NO. 1 UNDERGF3~UND MINE". THIS MONITORING NETWORK IS DESIGNED TO MONITOR THE FIRST PANEL WEST FROM THE SW MAINS INTAKES AND SOUTH OF THE N0. 1 WEST SUBMAINS, DESIGNATED AS "PANEL 1W-15", LOCATED AAIACENT TO AND PARALLEL TO THE WESTERN BOUNDARY OF SECTION 21, RANGE 90W, TGWNSHIP 135. THIS MONITORING NETWORK SHALL CONSIST OF SUBSTANTIAL MONUMENTS DESIGNED TO RESIST FROST-HEAVE, F/IRE, AND THE ACTIONS OF CATTLE AND WILDLIFE. Stipulation No. 19 J ~ ~~ THE SUBSIDENCE MONITORING NETWORK SHALL BE SURVEYED UTILIZING CONVENTIONAL GROUND SURVEYING TECHNIQUES, DESIGNED TO ACHIEVE HORIZONTAL ACCURACIES COMPLYING WITH THE U.S. DEPARTMENT OF CONA7ERCE'S "SECOND ORDER, CLASS II" SURVEY STANDARDS, AND VERTICAL ACCURACIES NO LESS THAN + 0.2 FEET. THIS GRID SHALL BE SURVEYED 'TWICE PRIOR ZO THE INITIATION OF SUBSIDENCE. IN CONJUNCTION WITH THESE SURVEYS WECC 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 PH(yIOGRAhM4ETRIC POST-SUBSIDENCE SURVEYS. ~ipulation No. 20 ,~ ~ ~~ WECC HAS REQUESTED PERMISSION TO COLLETS A PRE-SUBSIDENCE AERIAL PHO'IOGRANIME'1'RIC SURVEY OF THE SUBSIDENCE MONITNRING GRID, FOR THE PURPOSE OF CORRELATION WITH THE FIELD SURVEY RESULTS. IT IS WECC'S INTENTION TO UTILIZE AERL4I, PHOTOGR~TFIC METHODOLOGY TO MONITOR POST-SUBSIDENCE MCJVFMENTS OF THE SUBSIDENCE MON[A~PTS. THE RESULTS OF