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TABLE ONE -BOULDER COUNTY <br /> SEAM OVERBURDEN <br /> DATES OF THICKNESS THICKNESS PRODUCTION UNIQUE INFORMATION <br />MINE NAME LOCATION OPERATION (IN FEET) (IN FEET) (IN TONS) FEATURES SOURCES <br />Imperial Sec.8,9,10 1895-1898 6.0'-9.0' 281,859 7 <br />10 <br />1 <br />2 <br />3 <br />(Louisville T1S,R69W 1883-1888 , <br />, <br />, <br />, <br />Nos. 1&2) <br />(Old Imperial) <br />Independent Unknown 1906-1907, 4.5' 16,115 2,3,7,10 <br />Sec. 34 1921-1922 <br />T1N,R69W <br />Indino Unknown 1932-1933 6.0' 572 2,3,7,10 <br />Sec. 15 <br />T1S,R70W <br />Industrial SE,NW,SE 1895-1945 5.0'-7.5' 265' 3, 994,741 S 1,2,3,7,10 <br />Sec. 24 <br />(Also working Sec .25) <br />T1S,R70W <br />Irvington SE,SE 1907-1908 6.6'-12.0' 10,626 1,3,7 <br />(Haywood) Sec. 36 1899 <br />(Baker) T1N,R69W 1888-1895 <br />Jackson NW,SE,SW 1883-1890 5.0' 130,950 1,2,3,7,10 <br />Sec. 13 <br />T1N,R69W <br />Kitchen Slope NW, NW, NE None reported S,F 1,2,7 <br />Sec. 21 <br />T1S,R70W <br />Key to unique features symb ols: Z Multiple mining zones <br /> * Mine opening information <br />Reclamation and/or plans -- Table Two S Subsidence features <br />lists hazard abatement work F Mine fires <br />+ Discrepancy between two sources D Mine drainage _17_ <br />