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Mayo and Associates, LC <br />B) sec-e <br />OB <br />E ~ <br />6 <br />O a! <br />U <br />N <br />p 10 <br />a <br />7988 1989 <br />b) SBQ9 <br />309 <br />750 <br />E <br />300 <br />)°A 158 <br />m <br />L <br />~ 100 <br />9 <br />1990 1991 199] 1993 1990 19% 19% 1997 1998 1999 2108 <br />1988 1989 1990 1991 1997 1993 i99f 1995 19% 1947 3998 1949 ZItO <br />C) SBC-10 <br />300 <br />7sB <br />E <br />270 <br />~ 750 <br />190 <br />0 <br />sB <br />B <br />~- -- <br />19~ 1983 1990 1991 1997 1993 1990 1935 1996 199] 19% 19W 70tp <br />Figure 11 Discharge hydrographs of sandstone channel inflows from the Blind <br />Canyon seam mine roof to the Bear Canyon Mine - Co-Op Mine. <br />Modified after Mayo and Associates,1999a. <br />with the surface prior to being encountered by mining. The increased 3H content <br />measured in January 1999 is possibly the result of induced downwazd migration of <br />surface water along a small fault in the Beaz Canyon Fault zone, both sides of which have <br />been subsided. The increase in the radiocarbon age of the water is attributed to induced <br />flow from a portion of the sandstone channel that contained older water. <br />Evaluation of Potential Groundwater Inflows 42 Febmary 24, 2004 <br />Associated with E Seam Mining, <br />West Elk Mine, Somerset, Colorado <br />