Laserfiche WebLink
<br />4 <br /> <br />Appendix A). <br /> <br />Stipulation No. 3 <br /> <br />THE OPERATOR SHALL, UPON CLOSURE, INSTALL WATER-TIGHT SEALS WITHIN THE MINE TO <br />PREVENT GRAVITY DISCHARGE. THIS REQUIREMENT MAY BE WAIVED UPON THE DIVISION'S <br />APPROVAL OF A PLAN SUBMITTED BY THE OPERATOR. THIS PLAN SHALL INCLUDE A <br />DEMONSTRATION THAT THE WATER QUALITY OF THE DISCHARGE FROM THE MINE <br />WORKINGS WILL BE OF ACCEPTABLE QUALITY AND WILL REMAIN ACCEPTABLE AFTER MINE <br />CLOSURE. THIS SHALL INCLUDE CHEMICAL ANALYSIS AND A PREDICTIVE MODEL THAT USES <br />OXIDATION AND REDUCTION POTENTIAL TO DETERMINE LONG-TERM WATER QUALITY OF <br />MINE WATERS. ALSO, THE PLAN SHALL INCLUDE THE CONSTRUCTION OF A SUITABLE <br />CHANNEL FOR MINE DISCHARGE. <br /> <br /> STATUS: FUTURE <br /> <br />Stipulation No. 7 <br /> <br />THE DIVISION DIRECTS MOUNTAIN COAL COMPANY, PRIOR TO ANY DISTURBANCE AT THE <br />UPPER WASTE SITE, TO INSTALL SEVERAL ELECTRONIC TILT METER TUBES DOWNSLOPE <br />FROM THE TOE OF THE PROPOSED WASTE STRUCTURE. THESE TILT METER INSTALLATIONS <br />SHALL BE INSTALLED AS SPECIFIED IN MCC'S AUGUST 15, 1985 SUBMITTAL. ONE <br />INDICATOR SHALL BE INSTALLED WITHIN 160 FEET OF THE TOE OF THE WASTE PILE <br />CURRENTLY HALF WAY BETWEEN MONUMENTS 51 AND 54. THE SECOND SHALL BE <br />INSTALLED APPROPRIATELY 100 FEET NORTHEAST OF MONUMENT S2, 160 FEET NORTH OF <br />THE TOE OF THE WASTE PILE, AS INDICATED ON DRAWING NO. MG-R C-001, INCLUDED IN <br />THE PERMIT REVISION NO. 6 APPLICATION. DURING THE INSTALLATION OF THESE TILT <br />METER TUBES, THE OPERATOR SHALL AUGER AND LOG THE SURFICIAL AND BEDROCK <br />STRATIGRAPHY ENCOUNTERED. AUGERING SHALL CONTINUE UNTIL THE OPERATOR HAS <br />ESTABLISHED INTACT BEDROCK OCCURRENCE. IF ANY EVIDENCE OF EXISTING LANDSLIDE <br />DEPOSITS IS ENCOUNTERED, THE OPERATOR SHALL DEFINE THE NATURE AND EXTENT OF <br />THE PRE-EXISTING SLOPE INSTABILITY. IF SUCH LANDSLIDE ACTIVITY IS DISCERNED, THE <br />OPERATOR WILL BE REQUIRED TO APPROPRIATELY RECONFIGURE THE PILE DESIGN, PRIOR <br />TO INITIATION OF ANY CONSTRUCTION ACTIVITY. <br /> <br />STATUS: FUTURE. <br /> <br />Stipulation No. 76 <br /> <br />MOUNTAIN COAL COMPANY WILL INFORM THE MONTROSE OFFICE OF THE COLORADO <br />DIVISION OF WATER RESOURCES OF PLACEMENT OF ALL NEW SURVEY MONUMENTS. <br />MOUNTAIN COAL COMPANY WILL COPY THE MONTROSE OFFICE OF THE COLORADO <br />DIVISION OF WATER RESOURCES ON ALL SURVEY, PIEZOMETER, AND <br />ACCELEROMETER/SEISMOMETER MONITORING IN AND AROUND MONUMENT DAM. <br />MOUNTAIN COAL COMPANY WILL NOTIFY THE MONTROSE OFFICE OF THE COLORADO <br />DIVISION OF WATER RESOURCES WHENEVER THE PEAK GROUND ACCELERATION (PGA) <br />THRESHOLD IS EXCEEDED DURING THE MONITORING PERIOD, WHETHER MINE-INDUCED OR <br />NATURALLY-OCCURRING.