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SUMMARY OF AUGMENTATION REQUIREMENTS <br />Table 14 shows the resulting CU credits and depletions. This table illustrates that there are <br />excess CU credits in the months of May through September. The CU generated in April and <br />October is not sufficient to cover the demands of the crop. However, those amounts are usually <br />provided by reserves in soil moisture in April from snow melt and in October from irrigation in <br />August and September. The additional credits from changing 34 shares will increase the April <br />and October CU credits 4.83 af each for a total of 9.67 af. The rest of the depletions in the <br />months of October through April, as well as November through March, will just be supplied by <br />water rights in priority or from pond releases. CU credits established in case 88CW55 and those <br />requested in this current application may be used in any of the referenced drainages as needed, <br />no matter where the credits were established. <br />The augmentation requirements are further refined in Table 15 by analyzing the depletions and <br />credits in each of the drainages. This table also shows the number of shares and delivery <br />amounts that would be required to maintain historic return flows and to augment depletions. <br />DELIVERY OF RETURN FLOW OBLIGATIONS AND <br />INDUSTRIAL /AUGMENTATION SHARES <br />Figure 2B in the BBA report shows the only three active ditches in the Tuttle draw that could be <br />affected by current operations at New Horizon mine and future uses at NHN mine. The three <br />active ditches on Tuttle Draw are the Holder Ditch on a side tributary of Tuttle Draw, the <br />Charley Rice Ditch on the main stem of Tuttle Draw and the R & H Development Ditch at the <br />bottom of Tuttle Draw. Uses on the south portion of NHN will affect the Holder Ditch. <br />However, the BBA report has shown in their geologic analysis that the depletions from the mine <br />dewatering and water supply wells affect this tributary draw at a point below ditches. Therefore, <br />only the dust suppression depletions and evaporative depletions from NIT Mine Pond 001 <br />(Peabody Nucla Mine Pond NPDES 001) will affect the Holder Ditch. Only a portion of the <br />current uses and evaporative depletions from NH Mine Pond 006 (Peabody Nucla Mine Pond <br />NPDES 006) will affect the Charley Rice Ditch. No uses from the NHN site will affect the <br />Charley Rice Ditch. The R & H Development Ditch will be affected by present and future uses <br />in the south portion of NHN. Figure 2B also shows the only surface water right on Calamity <br />Draw, the Richards Waste Ditch, that may be affected by evaporative depletions from Ponds 7 <br />and 8 and from mine dewatering and water supply wells on the Cyprus area. <br />The mine uses in the northern approximately two- thirds of NHN are tributary to Coal Canyon. <br />There are not any senior surface water rights on the Coal Canyon drainage that will be affected. <br />Augmentation and historic return flow releases from the Highline Canal to both Tuttle and <br />Calamity Draws are made from headgates on the Elliot Lateral. Figure 2B shows those points. <br />Table 15 provides a drainage specific analysis of the depletions and CU credits as well as the <br />delivery amounts that are required from the Highline Canal in the event of a call from <br />downstream water rights. The delivery amounts are broken down into augmentation amounts to <br />replace depletions that are not covered by CU credits and releases necessary to maintain historic <br />return flows of irrigated areas. <br />13 <br />