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Model Simulation Results: Pumping & Drains <br /> The predicted head changes from the pumping simulations are depicted in Figure 5, at 6 month intervals. After <br /> 36 months of pumping, the predicted drawdown at PSI is —25', at PS2 is —20', and at WWTP is —19'. Within the <br /> 15' Target Groundwater Zone, the predicted drawdown after 36 months ranges from —17' to —25' at PSI. Within <br /> the 18' Target Groundwater Zone, the predicted drawdown after 36 months ranges from —8'to —20' at PS2. <br /> The predicted change in water levels from the two separate drain simulations (2' and 5') are depicted in Figures <br /> 6 and 7, at 6 month intervals. After 36 months of drain operations (2' drain elevation), drawdown in the 15' <br /> Target Groundwater Zone is —2', while in the 18' Target Groundwater Zone, drawdown ranges from —1' to —1.5'. <br /> For the simulation with a drain elevation of 5', drawdown in the 15' Target Zone is —5', while in the 18' Target <br /> Zone, drawdown ranges from —2.5' to —4.5'. <br /> The model predicted water level changes for the pumping and drain simulations, at monitor wells in the vicinity <br /> of the Town of Gilcrest are shown in Figures 8-29. The table below provides a tabulation of the predicted <br /> drawdown at each of the monitor wells, after 36 months of pumping/drain operations. <br /> Water Budgets: <br /> Monthly water budget results for the well pumping simulation are depicted in Figure 30. Well pumping was <br /> approximately 600 Acre-Feet/Month. Inflow from storage was approximately 600 Acre-Feet/Month initially, <br /> with storage inflow decreasing to approximately 275 Acre-Feet/Month after 36 months. Inflow from (or <br /> depletion to) the South Platte River was initially 0 Acre-Feet/Month, with inflow increasing to approximately <br /> 215 Acre-Feet/Month after 36 months. Initial constant head inflow (south and north ends of model domain) <br /> was initially 0 Acre-Feet/Month, with inflow approximately 110 Acre-Feet/Month after 36 months. <br /> Monthly water budget results for the drain simulation with a bottom elevation of -2' are shown in Figure 31. <br /> Outflow from the aquifer to the drains was approximately 245 Acre-Feet/Month initially, with outflow <br /> decreasing to approximately 60 Acre-Feet/Month after 36 months. Initial inflow from storage was <br /> approximately 245 Acre-Feet/Month, decreasing to 20 Acre-Feet/Month after 36 months. Inflow from the <br /> South Platte River was initially 0 Acre-Feet/Month, increasing to approximately 25 Acre-Feet/Month after 36 <br /> months. Constant head inflow from the southern and northern boundaries was initially 0 Acre-Feet/Month, <br /> increasing to approximately 15 Acre-Feet/Month after 36 months. <br /> Monthly water budget results for the drain simulation with a bottom elevation of 5' are shown in Figure 32. <br /> Outflow from the aquifer to the drains was approximately 615 Acre-Feet/Month initially, with outflow <br /> decreasing to approximately 145 Acre-Feet/Month after 36 months. Initial inflow from storage was <br /> approximately 615 Acre-Feet/Month, decreasing to 45 Acre-Feet/Month after 36 months. Inflow from the <br /> South Platte River was initially 0 Acre-Feet/Month, increasing to approximately 65 Acre-Feet/Month after 36 <br /> months. Constant head inflow was initially 0 Acre-Feet/Month, increasing to approximately 35 <br /> Acre-Feet/Month after 36 months. <br /> ' JVA, Inc. and Bishop-Brogden Associates, Inc, Dewatering Improvement Study, October 2016, 101 p. <br /> 2 <br />