AZ vs. CA:25 California Exhibits, Vol. XXV; Nos. 7501-7859

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: As claimed : As estimated • by Arizona : by me* Total in use, Lower Basin : 6 ,500,000 : 4 ,400,000 Remaining unused, total : 0 ,000,000 : 12 ,800,000 n m 011a River : 0 • 500,000 n n Colorado & other : • tributaries : 9 ,000,000 : 12 .300,000 (2) That the unused waters are avaliable for appropriation by Ari- zona. (Art. VII). Under the Colorado-Wyoming decision on Laramie Hirer waters, Arizona must recognise Upper Basin priorities. Initiated projects in the Upper Basin will require for their completion a material part of the unused waters. There is also for consideration the extent of valid claims by California with its dual system of appropriative and riparian rights. The aotual extent of unappropriated water could be determined only by a suitable proceeding in a court of competent jurisdiction, (3) That the unappropriated waters are required for the irrigation of 2,000,000 acres of feasible projects In Arizona. (Art. IX and XI). Without details regarding these projects, tisir defeots can not be pointed out. No projeots even approaching in magnitude the ones claimed are bellered feasible either now or in the near future. A general denial would probably be beat on this point* (4) That the reservoir and damsltes on Colorado River in Arizona and along its boundary are required for the irrigation of Arizona lands. (Art. I). The only plans so far advanced by Arizona contemplate diversion above Black Canyon. Physically all Arizona lands «an be reached with dams located upstream from Black Canyon. Black Canyon is not required for that purpose. (5) That projects already formed and in existence to utilize Colorado River waters In Arizona comprise 1,000,000 acres. (Aft. XI). No such projects have been carried to point where financing may be eonsidered even remotely accomplished. (6) That the ocrnpact apportions to the Upper Basin 5,000,000 acre feet and to the Lower Basin only 1,000,000 acre feet more than now appropriated. (Art. XIV). As estimated by me, Upper Basin is using 2,500,000 acre feet of 7,500,000 acre feet allotted,while Lower Basin is using 4,400,000 acre feet of 7,500,000 allotted. However, the compaot further allots 1,000,000 acre feet to the Upper Basin. On the basis of my estimates, the Upper Basin may increase its use by 8,000,000