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Mayo and Associates, LC <br />Table 4 Estimate of Co-Op Mine sandstone channel groundwater volume. <br />Assumed parameters <br />Length=3,250 feet (between faults) <br />Thickness=25 feet (estimate from Marley et al., 1979) <br />Width=300 feet (estimate from Mazley et al., 1979) <br />Porosity=.05 to .20 (estimate) Lines (1985) measured 0,14 for fine grained sandstones <br />in the Blackhawk sandstone. <br />Residence time in channel =1000 yeazs (14C date) <br />Rechazge <br /> Channel Storage Storage Rate <br />Lengtb (ft) Width (ft) Thickness (ft) Porosity Vol (R3) Vol (gal) Q (gpm) <br />3250 300 25 0.14 3412500 25525500 0.0486 <br />3250 300 25 0.14 3412500 25525500 0.0486 <br />3250 300 25 0.14 3412500 25525500 0.0486 <br />3250 300 25 0.05 1218750 9116250 0.0173 <br />3250 300 25 0.1 2437500 18232500 0.0347 <br />3250 300 25 0.15 3656250 27348750 0.052 <br />3250 300 25 0.2 4875000 36465000 0.0694 <br />3250 300 25 0.25 6093750 45581250 0.0867 <br />3.4.2 Fault Zone Fracture Flow <br />Fault-related fracture zone groundwater inflows do not occw in the Blind Canyon Mine. <br />However, two significant Fault related springs discharge near the mine. Birch and Big <br />Bear Springs issue from the Panther Member along the Pleasant Valley Fault damage <br />zone in Birch Creek and in Left Fork of Fish Creek canyons, respectively (Figure 10). <br />These springs discharge on the west and east sides of the 3,250 foot wide undamaged <br />block of the Bear Canyon Mine. Although the springs issue from fault damage zones, <br />they are not related to groundwater in the Blind Canyon Seam sandstone channel, which <br />is located about 300 feet above the Panther Member. Declines in discharge from the two <br />springs have had a long and contentious history. Both springs dischazge mixed sowce <br />water (i.e., modern and old). <br />Evaluation of Potenfial Groundwater Inflows 44 February 24, 2004 <br />Associated with E Seam Mining, <br />West Elk Mine, Somerset, Colorado <br />