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<br /> DATES OF <br />MINE NAME LOCATION OPERATION <br />Unknown NE <br /> Sec. 1 <br /> T1S,R69W <br />Unnamed shaft NW,NE <br /> Sec. 15 <br /> T1S,R70W <br />Vaughn SW,SE,NE 1897-1906 <br /> Sec. 1 <br /> T1S,R69W <br />Vulcan SE,SW,NE 1903-1937 <br /> Sec. 10 <br /> T1S,R69W <br />Welch NE,NW,SW 1891 <br />(Welsh) Sec. 9 <br /> T1S,R69W <br />Wilson SW,SW,SW <br /> Sec. 17 <br /> T1S,R69W <br />Wise Unknown <br />Key to unique features symbol: <br />Reclamation and/or plans -- Table Two <br />lists hazard ahatement work <br />+ Discrepa ncy between two sources <br />TABLE OME -BOULDER COUNTY <br />SEAM OVERBURDEN <br />THICKNESS THICKNESS PRODUCTION <br />(IN FEET) (IN FEET) (IN TONS) <br />None reported <br />13.5' 44,167 <br />4.0'-5.0' 180'+ 1,497,049 <br />19,131 <br />None reported <br />3,000 <br />Z Multiple mining zones <br />* Mine opening information <br />S Subsidence features <br />F Mine fires <br />D Mine drainage <br />UNIQUE <br />FEATURES <br />S <br />S <br />INFORMATION <br />SOURCES <br />1,2,7 <br />1 <br />1,2,3,7,10 <br />1,2,3,7,10 <br />1,2,3,7,10 <br />1,2,7 <br />2,3,7,10 <br />_pg_ <br />