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TABLE ONE -BOULDER COUNTY <br /> DATES OF <br />MINE NAME LOCATION OPERATION <br />Hecla No. 1 C,SW 1890-1920 <br /> Sec. 4 <br /> T1S,R69W <br />Hecla No. 2 C,SW 1893-1897 <br /> Sec. 4 <br /> T1S,R69W <br />Highway(Hi-way) SW,SW,SW 1930-1954 <br /> Sec. 14 <br />(Eversman) T1S,R69W 1928-1929 <br />(Hartman) Also working 1927 <br /> Secs. 23,26 <br /> T1S,R69W <br />High View NE,SE,SW 1930-1944 <br /> Sec. 21 <br /> T1S,R70W <br />Hillside Unknown 1948 <br /> T1S,R69W <br />SEAM OVERBURDEN <br />THICKNESS THICKNESS PRODUCTION <br />(IN FEET) (IN FEET) (IN TONS) <br />5.0'-9.0' 160'+ 1,309,756 <br />UNIQUE INFORMATION <br />FEATURES SOURCES <br />Water problems 1,2,3,7,10 <br />lower Hecla Bed(1920) <br />Key to unique features symbols: <br />Reclamation and/or plans -- Table Two <br />lists hazard abatement work <br />+ Discrepancy between two sources <br />7.0' 111,381 Water problems 1,2,3,7,10 <br /> lower Hecla Bed <br /> Z (two seams) <br />4.5'-7.0' 380'-400' 2,346,779 S, F, Gas exp.(1939) 1,2,7 <br />6.0' 94,980 *, S 1,2,3,7,10 <br />8.0' 212 2,3,10 <br />Z Multiple mining zones <br />* Mine opening information <br />S Subsidence features <br />F Mine fires <br />D Mine drainage -16- <br />