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DATES OF
<br />MINE NAME LOCATION OPERATION
<br />Rowley NW,NW,SW
<br /> Sec. 15
<br /> T1S,R70W
<br />Senator SW,NW,SE 1906
<br />
<br />Sec. 2 ,
<br />1911-1913
<br />(Willoughby) T1S,R69W 1907-1908
<br />Shanahan C,SW,SE 1897-1^07
<br /> Sec. 2
<br /> T1S,R70W
<br />Simpson SE,NE,NW 1889-1927
<br /> Sec. 2
<br /> T1S,R69W
<br />Also working Secs. 2,3
<br />34,35,T1N,R69W
<br />Simpson and Unknown 1890-1893
<br />Spencer No. 1 Sec. 2
<br /> T1S,R69W
<br />Simpson and Unknown 1890
<br />Spencer No. 2 Secs. 2,3
<br /> T1S,R69W
<br />(Spencer) Sec. 35 1891-1898
<br /> T1N,R69W
<br />Key to unique features symb ols:
<br />Reclamation an d/or plans -- Table Two
<br />lists haz ard abatement work
<br />+ Discrepancy between two sources
<br />TABLE ONE -BOULDER COUNTY
<br />SEAM OVERBURDEN
<br />THICKNESS THICKNESS PRODUCTION
<br />(IN FEET) (IN FEET) (IN TONS)
<br />None reported
<br />UNIQUE
<br />FEATURES
<br />S
<br />INFORMATION
<br />SOURCES
<br />1,2,7
<br />5.0'-8.0' 23,748orted 1,2,3,7,10
<br />11.0' 98,876 S 1,2,3,7,10
<br />6.0'-14.0' 240'+ 4,125,693 Oas explosion(1912) 1,2,3,7,10
<br />8.0' 158,140
<br />8.0'-14.0' 454,415
<br />Z Multiple minine zones
<br />* Mine opening information
<br />S Subsidence features
<br />F Mine fires
<br />D Mine drainage
<br />1,2,3,7,10
<br />1,2,3,7,10
<br />-25-
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