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TABLE ONE - HOGBACK REGION <br />LOCATION <br /> (county, DATES OF <br />MINE NAME quadrangle) OPERATION <br />Newcastle Garfield Co. 1888-1956 <br />(McDonald Newcastle <br />Tunnel) E/2,Sec.36 1932 <br /> T5S,R91W, and <br /> S/2,Sec.31 <br /> T5S,R90W <br />Newcastle- Garfield Co. 1956-1962 <br />Vulcan Storm King Mtn. <br />(Vulcan E/2,NE,Sec.1 <br />entry No.4) T6S,R91W 1892-1918 <br />North Canon Garfield Co. 1926-1959 <br />(Big Three) Horse Mtn. 1944-1948 <br /> SE,NW,Sec.12 <br /> T5S,R93W <br />Nu Gap No.3 Garfield Co. 1970-1979 <br />(Nu Gap Nos. Silt <br />1 and 2) SW,NE,Sec.24 1968-1970 <br /> T5S,R92W <br />Ohkraut Garfield Co. 1922-1942 <br /> Storm King Mtn. <br /> NW,NW,Sec.23 <br /> T6S,R90W <br />SEAM OVERBURDEN <br />THICKNESS THICKNESS PRODUCTION <br />(IN FEET) (IN FEET) (IN TONS) <br />8.0'-42.0' 1,345,461 <br />6.0' <br />3.7'-8.5' <br />6.5' <br />3.5' <br />400'-800' <br />Key to unique features symbol: 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 />25,306 <br />163,515 <br />6,648 <br />7,187 <br />UNIQUE <br />FEATURES <br />Z, F <br />Z, F <br />Reclamation <br />Gas explosion(1951, <br />1952), S, F <br />INFORMATION <br />SOURCES <br />1,2,4,5,6 <br />1,2,5,6 <br />1,2,3,6 <br />1,2,5,6 <br />1,2,5,6 <br />11 <br />