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DATES OF <br />MINE NAME LOCATION OPERATION <br />Cracker Jack NW, NE ,NW .1948-1958 <br />No. 2 Sec. 22 <br />(Cuba) T1S,R70W <br />Crown SW,NW,SE 1919-1936 <br />(Old Crown) Sec. 14 <br /> T1S,R70W <br />Crown (new) NE,NE,SE 1938-1955 <br /> Sec. 13 <br /> T1S,R70W <br />Davidson NE,NE,SE 1888 <br /> Sec. 6 <br /> T1S,R69W <br />Eldorado NE ,NE ,SW 1933-1939 <br /> Sec. 21 <br /> T1S,R70W <br />Electric S/2,NW,SE 1898-1918 <br /> Sec. 4 <br /> T1S,R69W <br />Key to unique features symbols: <br />Reclamation and/or plans -- Table Two <br />lists hazard abatement work <br />+ Discrepancy between two sources <br />TABLE ONE - ROULDER COUNTY <br />SEAM OVERBURDEN <br />THICKNESS THICKNESS PRODUCTION <br />(IN FEET) (IN FEET) (IN TONS) <br />7.0' 9,111 <br />4.2'-7.0' 270' 626,623 <br />7.0'-11.0' 618,413 <br />2.8'-3.5' 150' <br />5.5' 34,489 <br />5.5' 210'+ 73,839 <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 />Mine filled with <br />water (1957) <br />INFORMATION <br />SOURCES <br />1,2,3,7,10 <br />1,2,3,7,10 <br />1,2,3,7,10 <br />1,2,3,7,10 <br />*,Reclamation plans 1,2,3,5,7,10 <br />S <br />1,2,3,7,10 <br />-13- <br />