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LOCATION <br /> (county, DATES OF <br />MINE NAME quadrangle) OPERATION <br />Rifle Garfield Co. 1899-1902 <br />(Rifle Creek) Horse Mtn. 1942 <br /> SE,NW,Sec.12 <br /> T5S,R93W <br />Rifle Gap Garfield Co. 1948 <br />Songer) Rifle <br />"Maxfield NE,NW,Sec.18 (1) <br />Claim") T5S,R92W before 1910 <br />Rio Blanco Garfield Co. 1935-1950 <br /> Rio Blanco <br /> SW,NW,Sec.3 <br /> T4S,R94W <br />Robertson Garfield Co. 1932 <br /> Rifle <br /> Unknown <br />Roderick Garfield Co. 1935 <br /> Newcastle <br /> Unknown <br />Roletto Garfield Co. 1921 <br /> Newcastle <br /> Unknown <br />TABLE ONE -HOGBACK REGION <br />SEAM OVERBURDEN <br />THICKNESS THICKNESS PRODUCTION <br />(IN FEET) (IN FEET) (1N TONS) <br />3.7'-8.5' 5,250 <br />4.5' <br />2.6'-2.9' <br />9.0' <br />2.7' <br />3.5' <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 />INFORMATION <br />SOURCES <br />1,2,6 <br />100 Reclamation 1,2,3,4,5,6 <br />Underground extent <br />of "Maxfield Claim" <br />is unknown <br />21,338 previously recorded 1,2,5,6 <br />in Rio Blanco Co. <br />780 2 <br />129 2 <br />613 2 <br />14 <br />