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DATES OF <br />MINE NAME LOCATION OPERATION <br />Baker SE,SE,NE 1905-1909 <br /> Sec. 1 <br /> T1S,R69W <br />Banner Shaft NE,SE,SE 1933-1934 <br /> Sec. 14 <br /> T1N,R69W <br />Barber Unknown 1870's <br /> NE ,SE <br /> Sec. 15 <br /> T1S,R70W <br />Big Five SW,NE,SE 1938-1942 <br />(Cracker Jack) Sec. 11 1935-1937 <br /> T1S,R70W <br />Big Lake SW,SW,NE 1916 <br />(Garribaldi) Sec. 4 <br /> T1S,R69W <br />Black Diamond NW,SE 1914-1931 <br />No. 1 Sec. 11 <br /> T1S,R70W <br />Black Diamond NE,NW 1885,1902-1 <br />(Old) Sec. 11 <br /> T1S,R70W <br />Key to unique features symbols: <br />Reclamation an d/or plans - - Table Two <br />lists haza rd abatement work <br />+ Discrepancy between two sources <br />TABLE ONE -BOULDER COUNTY <br />SEAM OVERBURDEN <br />THICKNESS THICKNESS PRODUCTION <br />(IN FEET) (IN FEET) (IN TONS) <br />5.0' 11,517 <br />4,285 <br />None reported <br />4.0'-5.0' 39,089 <br />3,449 <br />5.0' 330,047 <br />908 7.5' 54,515 <br />Z Multiple mining zones <br />* Mine opening information <br />S Subsidence features <br />D Mine drainage <br />UNIQUE <br />FEATURES <br />S <br />S <br />S <br />S <br />INFORMATION <br />SOURCES <br />2,3,7,10 <br />2,3,7,10 <br />2 <br />2,3,7,10 <br />1,2,3,7,10 <br />1,2,3,7,10 <br />1,2,3,7,10 <br />-9- <br />