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less than 0.15 feet/day and is assumed to be 0.03 feet/day for the most likely case. <br />Porosity for fractured crystalline rock ranges up to 10% (Driscoll, 1986, p.67). <br />Considering the high flow rates measured during testing, the porosity is unlikely to be <br />less than 1 percent. <br />The first part of Table 8 lists the probable minimum, most likely, and probable <br />maximum velocities and transit times of ground water between the flooded mine <br />workings and diffuse discharge along Cement Creek. The second part of Table 8 lists <br />the most likely and probably maximum velocities and transit times of ground water <br />which might follow the Brenneman vein and intersect the idle workings of the Mogul <br />Mine. If the equilibrium water level is approximately at F level (as expected) then the <br />majority of the water passing through the flooded workings (estimated at 70 gpm) is <br />expected to take over 150 years to reach Cement Creek, but a lesser amount <br />(estimated at 4 gpm) may move via the Brenneman vein and have a transit time of <br />approximately 16 years. In the unlikely event that the maximum possible equilibrium <br />water level is reached, the estimated transit times would be reduced to about 10 and <br />1.5 years, respectively. <br />Gunny\wp\traci\2251 \Mar1993.Rpt 5 6 <br />NCI SIt110I1 HYDRO-SEARCH <br />