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Cases 3 and 4 assume ground water preferentially moving along the Brenneman vein <br />and use the high hydraulic conductivity fourd in unusually fractured areas. Since the <br />flow from the Brenneman vein is approximately equal to the flow in the area of the <br />American Tunnel flow tests, it is reasonable to assume that the hydraulic <br />conductivities are also similar. The width of enhanced fracture permeability is <br />assumed to be 500 feet for the calculation, but it is probably less. If ground water <br />does move along the Brenneman vein it will encounter the Mogul Mine workings at <br />a distance of 2640 feet at an elevation of 11,400 feet. Case 3 assumes the expected <br />equilibrium water level at F level and results in an estimated flow of 4 gpm. Case 4 <br />assumes the absolute maximum possible equilibrium water level of 12,250 feet and <br />results in an estimated flow of 160 gpm. The flow in cases 3 and 4 would discharge <br />from the portal of the Mogul Mine. <br />When considering possible flow along the Brenneman vein, it should be emphasized <br />that no flow is expected to take this route unless the equilibrium water level in the <br />flooded mine workings exceeds 11,400 feet msl (the elevation of the Mogut Mine <br />main level). At an equilibrium water level above 11,400 feet, ground water could <br />begin to move via fracture permeability toward the Mogul Mine. Although a tunnel <br />connection between the Sunnyside and Mogul Mines exists at an elevation of 11,904 <br />feet msl, the actual tunnel connection is not expected to serve as a significant conduit <br />for water movement. At the proposed bulkhead sites at both the F-level Brenneman <br />and the B-level Brenneman, the bulkheads would actually consist of a pair of <br />Gunny\wpltraci122511Mar1993.Rpt 54 <br />Hal SIR1011 HYDRO-SEARCH <br />