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<br />The active-model domain includes an area extending from the highlands west of <br />-the Wattenberg approximately 2'/s miles to the :east, and-from roughly two miles - <br />north of Wattenberg to approximately'h-mile south of Brighton. Within this-area;- - - <br />- not all of the-model is active, as the aquifer vazies somewhat in width along the <br />north-south axis. The.South Platte River lies almost in the center of the active - - <br />portion of the model domain, following a mildly meandering path from south to <br />north. The average gradient on the river is low, which accounts for the <br />,: ,- meandering-nature ofthe.stream-channel. The-actual aquifer extends beyond the <br />north and south boundaries of the model domain. Figure 2 presents the modeled <br />area along with the model grid and boundary conditions as discussed in .more <br />detail below: - - <br />The model setup involves breaking the active model domain into discreet cells for - <br />which data input on all required pazameters necessary to operate the simulation <br />are entered. For this problem, it was decided to use a variable grid of cells in <br />which relatively fine cell sizes were used in the vicinity of the mine and larger <br />cells used further out from the mine area. This increases the model resolution in <br />the area of the stresses and reduces data and memory requirements for areas of the <br />model domain where less resolution is required. Figure 2 details the model grid, <br />indicates the active and inactive portions of the grid, and presents the location of <br />the pit, the Ski Lake to the east and the reported locations of Mr. Brancucci's <br />wells. <br />5 <br />Mason and Wood Water Consultants, Inc. <br />