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<br />Q = KIA where: <br />Q = discharge (i.e. leakage) <br />K = hydraulic conductivity <br />1 = gradient, and <br />A = the cross-sectional area of the "aquifer" through <br />which water flows. <br />A spreadsheet (Table 6) was developed in order to allow a range values of hydraulic <br />conductivity, gradient, and area. The expected values correspond to a hydraulic <br />conductivity of 10-8 cm/sec, a hydraulic head near F-Level, and a blast damage zone <br />out to 3 feet from the mine walls. The leakage through the fractured volcanics is <br />expected to be less than 0.1 gallon per minute (Case B on Table 6). Conservative <br />values correspond to a hydraulic conductivity of 5 x 10-5 cm/sec and a hydraulic head <br />at the level of the land surface in Sunnyside Basin. The leakage via the fractured <br />volcanics in the conservative case is still less than 25 gallons per minute at any given <br />bulkhead (Case I on Table 6). <br />sunnylwpltraci\22511Mar1993.Rpt 44 <br />H:I SI(TI011 HYDRO-SERRCH <br />