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• <br />SEEPAGE <br />We performed permeability testing at this site. In -situ permeability tests included <br />• falling head tests conducted in the upper soils and packer tests conducted in the <br /> r underlying bedrock. The State guidelines indicate groundwater inflow (seepage) into or <br />out of the reservoir should be no greater than 0.03 ft /day /ft (cubic feet per day per <br />square foot) multiplied by the length of the seepage barrier in feet multiplied by the <br />average vertical depth of the seepage barrier as measured from the ground surface to <br />the reservoir bottom along the toe of the reservoir side slope, plus 5.3 x 10 -7 cm /s <br />(0.0015 ft /day /ft) multiplied by the area of the bottom of the reservoir or natural bedrock <br />bounded by the seepage barrier. The thickness of the slurry wall and specified minimum <br />permeability of the slurry wall materials given the data we have appears to meet the <br />specified limits for seepage out of the sides of the reservoir. Packer test results at two <br />locations in the bedrock measured permeabilities of 1.8 x 10 -5 cm /s (0.051 ft/day) and <br />2.6 x 10 -5 cm /s (0.073 ft/day), which is less than the specified limits presented in the <br />State guidelines. We believe the packer tests have measured horizontal permeability of <br />the bedrock suggesting there are thin, slightly more permeable layers. However, <br />experience shows the vertical permeability of the bedrock is less than the horizontal <br />permeability by one or more orders of magnitude. <br />0, . <br />McLAUGHLIN WATER ENGINEERS, LTD. <br />GOOSE HAVEN RESERVOIR COMPLEX EXPANSION 19 <br />CTL IT PROJECT NO. FC04797 -145 <br />Pseudo - Static Coefficient 0.05g <br />