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The depletion to Sage Creek caused by Well No. I increases annually until completion of the mining activities in year 15. As discussed earlier, the annual depletion in year IS is expected to be about 0.74 acre-foot, of which about 0.31 acre-foot would occur during the irrigation season. At the direction of the Water Commissioner, Peabody will release up to 0.31 acre-foot each irrigation season from Pond Y-I to replace the out- of-priority depletion. Replacement releases will begin in year I and continue through the reclamation period. If Sage Creek Reservoir is repaired and operated in the future, Pond Y-1 will be in priority only during the years in which Sage Creek Reservoir fills. The State Engineer's records show that Sage Creek Reservoir filled only once in the 12 years of record. This indicates that water would be available to Pond Y-I infrequently and that Pond Y-I would be an unreliable source of replacement water. During the non-irrigation season, the reduction in streamflow above Sage Creek Reservoir caused by Well No. I is expected to be about 0.01 acre-foot. If Sage Creek Reservoir or other storage rights are activated, Peabody will haul water from Wadge Pit Reservoir for storage in and release from Pond Y-I or for release directly to Sage Creek at the direction of the Water Commissioner. Wadge Pit Reservoir is located on a tributary to Grassy Creek at the Seneca II Mine. It has a decreed capacity of 270 acre-feet, and is shown in Plate I. Yampa River The Water Commissioner stated that to his knowledge, there has been no curtailment of junior appropriators due to river calls on the Yampa River. In 1977, the Division Engineer was prepared to enforce a river call; however, precipitation in the late summer eliminated the necessity for curtailment of junior diversions. If certain conditional water rights are developed on the Yampa River, curtailment of junior water rights may be necessary. Therefore, Peabody should be prepared to replace out-of- priority depletions with respect to the Yampa River during the non-irrigation season. Up to 0.43 acre=foot may be required during the non-irrigation season to replace the streamflow depletions caused by Well No. I with respect to the Yampa River. Up to 32.67 acre-feet may be required to replace out-of-priority depletions caused by the operation of Pond 006 and Pond Y-I during the non-irrigation season (this assumes one complete fill of each pond). Also, up to 4.3 acre-feet may be required to replace the historical return flow from irrigation of 20 acres under the J.C. Temple Ditch No. I 13