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<br />VI. SITE USE AND MTTIGATIONS <br />Site Use <br />In total, 43 holes were drilled during the project on NFSL and on adjacent private land. Drilling <br />activities were completed by May 15, 2000. Disturbance on NFSL associated with drill pad and <br />access road construction covered about 7.8 acres. The boreholes were placed where they could <br />break into the mine at specific locations. Borehole locations were surveyed in by mine <br />personnel, and were overlain on the survey grid of the underground workings. The series of <br />boreholes were used for a) placing cement grout seals in the mine to isolate the thermal event <br />azea, b) injecting water into the isolated azea, c) monitoring gas levels in the mine, and d) <br />injecting nitrogen and fire fighting foam to suppress the combustion. Seventeen cement/fly ash <br />seals were installed in the mine workings. Two PVC water pipelines were laid adjacent to the <br />Apache Rocks road across about 2.5 miles NFSL. The water pipelines conveyed about 40 million <br />gallons of water to the drill site and was pumped underground to inundate the combustion azea. <br />Mitieation <br />The Forest Service informed MCC of requirements regarding site use and the requirements for <br />• reclamation and restoration. MCC will be responsible for restoring the land where surface <br />disturbance occurred, and ensuring that the pre-existing land use remains the same. The Forest <br />Service will oversee the reclamation and restoration efforts so that a net benefit to the land is <br />gained as a result of the thermal event drilling effort. The land surface where drill pads were <br />built will be restored to approximate original contour and revegetated with a Forest Service- <br />approved seed mix. All spur access roads created will be obliterated. Existing Forest Service <br />roads that were upgraded by MCC will not be maintained to the upgraded condition, rather the <br />roads will be allowed to degenerate to pre-project condition. MCC will be responsible for <br />pulling in road berms and revegetating those azeas. <br />The Forest Service allowed MCC to perform a minor road relocation that moved an existing road <br />out of a drainage and placed it on a side slope. The prior road alignment has been recontoured <br />and reseeded to promote [he return of riparian conditions and habitat. <br />Reclamation activities aze continuing, and MCC has provided written updates to the Forest <br />Service and CDMG (project file). All rehabilitation restoration plans aze being evaluated and <br />approved through the mine permit revision process overseen by the CDMG. <br />VII. REFERENCES CITED <br />Bureau of Land Management, 1997. Environmental Assessment U-97-04. Coal Lease <br />Readjustment C-1362. <br />CJ <br />