WSP00913

• File Number: 8272.600.60
• Description: Colorado River Basin Salinity Control Program - Basin Member State Info - Utah
• Basin: Colorado Mainstem
• Water Division: 5
• Date: 3/7/1975
• Title: Colorado Regional Assessment Study - Phase One Report for the National Commission on Water Quality - Part 2 of 2 -- Chapter VI - end
• Water Supply Pro - Doc Type: Report/Study

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the Central Arizona Project in the event of shortage. 2l

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Compact Apportionment Among Upper Division States.

The upper

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division states avoided litigation and reached agreement on a formula

for apportioning rights to the flow in their part of the basin. The Upper

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Colorado River Elasin Compact of 1948 allots to Arizona 50,000 acre-feet

per annum and, as to the balance of the annual consumptive use available

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to the Upper Basin, apportions to Colorado, 51. 75 percent; New Mexico,

11.27 percent; Utah, 23 percent; and Wyoming, l4 percent. 2.2 The gross

amount of annual consumptive use allowable in the Upper Basin, against

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which these percentages apply, has become less than 7.5 m. a. f. with

the downward revision of estimates of average river flow. Water avail-

able for Upper Basin consumptive use is now projected by the Bureau

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of Reclamation to be from 6.5 to 5.8 m. a. f., the latter figure being a

"conservative hypothesis" used by the Elureau of Reclamation for plan-

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ning purposes.

Reserved Rights for Indians. Indian tribes, regarded as quasi-

sovereigns under the law, nonetheless were not parties to either the

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interregional allocation of the 1922 Compact or the interstate allocation

of the 1948 Compact. Each of the compacts contains a negative declara-

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tion to the effect that Indian rights are outside the reach of the Interstate

accord.23 Each of the compacts also declares that the consumptive use

of water by native Americans is charged against the state in which the

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use is made.

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