Laserfiche WebLink
1 <br /> t5• Groundwater and Well Protection: The sequential mining of the site <br /> ' requires that de-watering occur in an area for a certain length of time <br /> followed by a period of time during which no de-watering will occur. <br /> The precise length of the time during which de-watering occurs will be <br /> dependent upon the exact duration of the extraction operation below the <br /> normal water table within that small mining area, which in turn, is <br /> controlled by the demand for gravel at that point. The exact prediction <br /> of the times and lengths of de-watering activities are beyond the scope <br /> ' of this mining plan. In general , however, de-watering will occur when <br /> gravel is mined below the normal water table, which will be from 1/3 to 1/2 <br /> ' of the total time required to mine a given phase. <br /> ' The de-watering operation will result in the lowering of the water table <br /> in the immediate vicinity of that mining area. There are essentially <br /> ' three options for disposal of the pit water. <br /> ' a. Pumping it into the newly constructed storm sewer along North 35th <br /> ' Avenue, causing it to flow directly into the Poudre River <br /> b. Pumping it directly into Greeley No. 3 ditch which would return it <br /> ' directly to the Poudre River. <br /> ' c. Pumping it back into the ground using an injection well , or a series <br /> ' of such wells, located at sufficient distance from the de-watering <br /> area as to avoid recycling of water. <br /> These three possibilities are discussed in more detail in the water <br /> ' resource management plan included as Appendix 11 . That water resource <br /> ' -21- <br />