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r Shiprock, and Bluff for 6 representative years illustrate the changes in flow between these two modeling efforts and also include all of the depletion changes in the basin (Figures 1-18). 3. Delivered when Navajo Storage Over 660,000 AF When the storage in Navajo Reservoir drops below 660,000 AF, the Reservoir cannot deliver water into the Navajo Indian Irrigation Project. The computer model used in this analysis did not release the 300,000 AF for the endangered fish when it would cause the storage in Navajo Reservoir to drop below 660,000 AF. For the current level of depletion (including the reasonable and prudent alternative to the Animas-La Plata Project), this cut-off target does not affect the number of years that the release for endangered fish is made. If and when the level of depletions increases (through future project depletions), some balancing of benefits will be required. lowering the level at which releases are discontinued will allow the release of water for endangered fish in more years, but the Reservoir will spill less frequently resulting in a sharper "spike" in the hydrograph. Keeping this target level will preserve the gravity diversion for Navajo Indian Irrigation Project and preserve a more "natural" shape of the hydrograph, but wi 11 reduce the number of years that releases can be made. D. Stage A at 57,100 AF Stage A as presented to the Service by Reclamation includes the construction of Ridges Basin Reservoir, the inlet pipeline, the Durango Pumping Plant, a smaller Ridges Basin Pumping Plant, the Shenandoah and La Plata rural, and the Durango M&I pipelines. These facilities represent the only delivery system associated with the depletion of 57,100 AF that will be built under the reasonable and prudent alternative. E. Interim Operation of Stage A When Ridges Basin Reservoir reaches approximately 168,00 AF capacity the system would be declared operational. M&I water could be immediately delivered to New Mexico and the city of Durango, and through the La Plata Rural and Shenandoah Pipelines. New Mexico's San Juan Water Commission water supply would be picked up using existing diversions on the Animas and San Juan Rivers. Similarly, the Navajo water supply could be delivered from the San Juan River at existing diversions near the town of Shiprock, New Mexico. Most of this supply for New Mexico would come from the direct flows from the River. An average of only 1,400 AF yearly (9,000 to 0 acre-feet range) would be supplied from the Reservoir, down Basin Creek and to the San Juan River via the Animas River. 7