Laserfiche WebLink
Second Submittal <br /> 5.3 Results Discussion <br /> 5.3.1 Drawdown <br /> Overall, the model predicts that five wells (Cherry, West, two Morgan Timber and the <br /> Plantorium)may be impacted for a period of time during the advancement of mining. The <br /> Cherry and West wells are predicted to be essentially dry while the other wells will <br /> maintain a saturated thickness that could allow continued production. Despite the <br /> remaining capacity,mitigation measures may be required for those wells. <br /> Mitigation measures could include: 1) providing a water tap from the West Fort Collins <br /> Watgr District,2)deepening Wells to ensure there is still adequate saturated thickness from <br /> which groundwater can be extracted, and 3) re-introducing pumped groundwater through <br /> a leach field or injection well back into the aquifer near the impacted well. <br /> 5.3.2 Mounding <br /> As exhibited in Figure 16 though'Figure 20, slight mounding is predicted up gradient of <br /> the pits west boundary. The areA that is predicted to be statistically significant (above 2 <br /> feet) extends occurs after reclamation. The most significant predicted mounding is due to <br /> reinjection into the water management pond. The predicted maximum rise in the <br /> groundwater adjacent to the water management pond is predicted to be 4 feet as dewatering <br /> is initiated in Phase 1. As mining progresses the projected dewatering rate is anticipated <br /> to be less. In the predictions, it was assumed that the maximum dewatering rates would be <br /> sent to the water management pond to maintain conservatism in the predictions. The <br /> maximum rise is 3 feet or less as the Phases progress and the drawdown impacts expand to <br /> provide extra storage capacity in the alluvium. <br /> 5.3.3 Ditch / Drain Effects <br /> Potential ditch and drain effects were evaluated by comparing the steady-state numerical <br /> model simulated ditch loss or drain flows to the individual predicted flows during each <br /> phase. No measurements of flows are losses were made for this effort and we relied on the <br /> rule of thumb to evaluate if the model simulation and predictions were reasonable. The <br /> Loveland Ready-Mix Concrete 19 Telesto Solutions.Inc. <br /> znixouz_ ida t­n,aY_z,.1Y b­w 1.,. January 2018 <br />