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The total water requirement is 100.9 acre-feet, ignoring <br />the return-flow Credit and the pit inflow. This is less than <br />the consumptive-use credit derived from the 27 shares, so- <br />that Peabody owns the rights to obtain sufficient xater from <br />the Colorado ~CO-operative ditch to implement this plan. <br />The pit-inflow rate is the basis for the amount of <br />water needed for augmentation. To illustrate; if no water <br />flows into the pit, then there can be no impact to surface- <br />wate; rights, because no water is being di4erted from the <br />rights. Twice the average pit inflow rate is the upper limit <br />to the amount of water needed for augmentation inciurling the <br />0.5 administrative-loss factor. <br />Eleven (il) surface-xater rights (Figure 2J were <br />• ~ determined to be potentially impacted and are 3neluded in the <br />proposed augmentation plan. Twenty-nine (29) wells were <br />examined to determine potential impacts to ground-water <br />rights, of these, 27 were determined to be too deep to be <br />impacted by the mining operation; however, two shallower- <br />vells which may be impacted will ba monitored provided <br />approval is obtained from the veli owners. A monitoring <br />program to.provide information about changes in surface-water. <br />flow volumes and ground-water levels adjacent to the NOCW+ <br />EAST mining area is also presented (see Section 4.a). <br />9 <br />GEO7AAN5, INC. <br />• ` <br />REVISED MARCH 2006 Attachment 2.05.3(3)-16-54 <br />