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--; <br />storage; under the further assumption that appropriate specific yield <br />factors were input. - - _ <br />V. SIMULATIONS _ <br />Following-the establishment of the steady-state calibrated. heads, the next step was <br />to begin the actual predictive simulations for the two mining phases. <br />For each ofthe_two mining phases,-as per.generalized mining plans provided by <br />Aggregate Industries, the area to be mined was overlain on the model grid and the <br />cells selected that would be dewatered under that mining phase. Around the <br />perimeter of these azeas was placed simulated drains that would dewater the;area <br />central to the perimeter drains. The drains were set just above the local bedrock <br />elevation to facilitate essentially complete dewatering of the interior area without <br />resulting in "No Flow" cells. The model, set to run in a steady-state <br />configuration, was then run and the output generated as a contour map of <br />drawdown. For each simulation, the drawdown contours were set to 2.0-feet. <br />As noted above, the simulation of the south mined azea also included the north <br />azea as dry. This is considered to be a conservative aspect of the model in that the <br />north azea, once mined, will be expected to flood, forming a lake that in reality <br />would attenuate the drawdowns from successive phases; the extent of such <br />attenuation would depend on the distance from the lake to the current mined area, <br />as well as their true respective geometries. <br />11 <br />Marlin and wood Water Consultants, Inc. <br />