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<br /> <br /> <br /> Panels B26-1 through B26-4 --B Seam Mine Ventilation Boreholes <br /> <br />Technical Revision Number TR-158 <br /> <br />Panel B26 <br />B Seam Mine Ventilation Boreholes B26-1 through B26-4 <br /> <br /> <br />FEDERAL COAL LEASES C-1362, COC-67232 <br /> <br /> <br />GUNNISON COUNTY, COLORADO <br /> <br /> <br /> <br /> <br />MOUNTAIN COAL COMPANY, LLC <br /> <br />WEST ELK MINE <br /> <br />CDRMS PERMIT NO. C-80-007 <br /> <br />SOMERSET, COLORADO <br /> <br /> <br /> <br /> <br />October 6, 2025 <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br />