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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 water 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 />water rights, because no water is being diverted from the <br />rights. Twice the average pit inflow rate is the upper limit <br />to the amount of water needed for augmentation including the <br />O.5 administrative-loss factor. <br />.~ Eleven (11) surface-water rights (Figure 2) were <br />determined to be potentially impacted and are included 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 />wells which may be impacted will be monitored provided <br />approval is obtained from the well owners. A monitoring <br />program to provide information about changes in surface-water <br />flow volumes and ground-water levels adjacent to the NUCLA <br />EAST mining area is also presented (see Section 4.4). <br />~• 9 <br />GEO'TRANS, IMC. <br />