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<br />. <br /> <br />. <br /> <br />1. Demands (diversion or consumptive) in New Mexico first looked to the <br />river for satisfaction and then, if still unsatisfied, requested <br />water from Navajo Reservoir. <br /> <br />2. Recognizing that New Mexico's Colorado River Compact entitlement is <br />not fixed but subject to future hydrologic conditions and also that <br />the model contains various approximations, we have imposed an <br />additional New Mexico consumptive demand in the model to those <br />indicated above in an attempt to make a conservative determination <br />of the storage requirement for New Mexico consumptive uses. An <br />additional consumptive demand of 90,000 af was imposed with a uniform <br />monthly demand and located at the modeled Utah International existing <br />demand. <br /> <br />3. No releases for maintenance of minimum flows (for fish or power <br />generation purposes) were considered in this determination. <br /> <br />4. A Navajo Reservoir minimum pool of 660,000 af was assumed to be <br />required to enable deliveries to the Navajo Indian Irrigation <br />Proj ect. <br /> <br />5. No water other than required to serve downstream demands or refill <br />Navajo Storage was assumed to contribute to downstream flows. <br />Therefore, during each month of the study period the San Juan River <br />system downstream of Navajo Reservoir was operated, consumptive use <br />shortages determined and water released from Navaj 0 Reservoir to <br />satisfy those demands. Water that existed at Navajo Reservoir which <br />was surplus to downstream demands and that required to fill the <br />operational storage of Navajo Reservoir, that water was removed from <br />the water system. <br /> <br />Use of this model in the manner described indicated that 540,000 af of Navajo <br />Reservoir storage is required to satisfy approximately 750,000 of consumptive <br />demands in New Mexico. We believe provision of 540,000 af of storage for New <br />Mexico consumptive uses would allow New Mexico to satisfy its consumptive use <br />entitlement under the Colorado River Compact. <br /> <br />Navajo Reservoir capacity is 1.7 million af of which we understand 660,000 af <br />is the required minimum pool to enable reservoir releases to the Navajo Indian <br />Irrigation Project (NIPP). This leaves approximately 1,040,000 af of potential <br />operational storage in the reservoir. If 540,000 af of this 1,040,000 af is <br />reserved for New Mexico uses as suggested, it would leave 500,000 af of <br />operational storage for other uses including the endangered fish. Our proposal <br />suggests that this 500,000 af of storage be dedicated for the endangered fish. <br /> <br />If this proposal were implemented, it would be important that New Mexico get the <br />first use of Navajo Reservoir to satisfy its consumptive needs and keep its <br />storage full. It would also be important that New Mexico use its storage <br />releases for satisfaction of consumptive uses and not use its releases for non- <br />consumptive purposes such as maintenance of fish flows or flows for power <br />generation. Non-consumptive releases would be made out of the 500,000 non-New <br />Mexico portion of storage. <br /> <br /><S> Leonard Rice Consulting Waler Engineers.lnc, <br />