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<br />LOCATION <br /> (county, DATES OF <br />MINE NAME quadrangle) OPERATION <br />Diamond-- Garfield Co. 1898-1911 <br />(Cardiff) Cattle Creek <br />(Black S/2,NE,Sec.8 <br />Diamond) T1S,R89W <br />Diamond Garfield Co. 1933-1951 <br />(Diamond) Cattle Creek <br /> S/2,NE,Sec.8 <br /> T7S,R89W <br />Doll Smith Garfield Co. 1918-1923 <br />(Smith) Newcastle 1918-1919 <br /> NE,NW,Sec.28 <br /> T5S,R91W <br />Dutch Creek Pitkin Co. 1965-1967 <br />No. 2 Placita (reopened <br /> E 1/2,Sec.17 as of 1972) <br /> T10S,R89W <br />Dutton & Garfield Co. 7 <br />Hasley Silt Before 1910 <br /> NE,NE,Sec.17 <br /> T5S,R92W <br />TABLE ONE -HOGBACK REGION <br />SEAM OVERBURDEN <br />THICKNESS THICKNESS PRODUCTION <br />(IN FEET) (IN FEET) (IN TONS) <br />5.0'-16.0' 109,134 <br />8.0'-18.0' <br />2.0' <br />6.0'-7.0' 3,000' <br />10.9'-12.0 <br />12,917 <br />669 <br />275,731 <br />(1967 total) <br />None reported <br />Key to unique features symbols: 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 <br />UNIQUE <br />FEATURES <br />Z <br />Z <br />No. 2 is an in- <br />active opening of <br />active Dutch Creek <br />Z,F <br />INFORMATION <br />SOURCES <br />1,2,6 <br />1,2,6 <br />1,2,4,5,6 <br />1,2,6 <br />1,4,5 <br />6 <br />