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<br />• MODEL VERIFICATION <br />CTL T compared contours of groundwater elevations generated by the model <br />to contours generated from the groundwater elevations measured in the field before <br />construction of the new reservoir to verify the model. The groundwater surface <br />elevation contour map generated by the model was similar to the groundwater surface <br />elevation map generated from the measured groundwater elevations verifying the <br />model (Figures 2 and 3). <br />VISUAL MODFLOW BEFORE CONSTRUCTION OF RESERVOIR NO.2 <br />The default solver setting "WHS solver" was run after the boundary conditions <br />were set. A maximum of 1,000 outer iterations and a maximum of 25 inner iterations <br />were used to achieve an appropriate mass balance without error and to achieve <br />convergence on a solution. Both the head change criterion and residual criterion <br />were assigned a value of 0.01 feet to define the acceptable change in head between <br />iterations. A damping factor of 1 and a relative residual criterion of 0 were used for <br />the analysis. The factorization level was assigned a Level 0. The modeling was <br />completed using the slover engine to perform the translation and run function. <br />The model converged and the output data was analyzed. The estimated <br />groundwater elevation contours before Reservoir No. 2 construction is shown on <br />Figure 3. <br />VISUAL MODFLOW AFTER RESERVOIR NO.2 CONSTRUCTION <br />Reservoir No. 2 was inserted into the model while holding the boundary <br />conditions and subsurface data constant to evaluate change in groundwater elevation <br />as a result of constructing the new reservoir. The new reservoir was modeled by <br />inserting another wall boundary condition around the proposed perimeter of the new <br />reservoir. 'The new wall boundary condition combined with the existing wall boundary <br />condition for the existing two reservoirs resulted in a continuous wall around the <br />group of three Goose Haven reservoirs. A constant head boundary condition of <br />5,049.5 feet was assigned to the new reservoir. Using the solver engine, CTL I T <br />McLAUGHLIN WATER ENGINEERS, LTD. 11 <br />GOOSE HAVEN RESERVOIR COMPLEX EXPANSION <br />CTL I T PROJECT NO. FC04797.002-145