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<br />
<br />Commission, United States and Mexico (IBWC); (4) whether the reasonable consumptive
<br />use requirements of mainstream users in the Lower Division States will be met under a
<br />"normal," "surplus," or "shortage" condition as outlined in Article III ofthe Operating
<br />Criteria; and (5) whether water apportioned to, but unused by one or more Lower
<br />Division States exists and can be used to satisfy beneficial consumptive use requests of
<br />mainstream users in other Lower Division States as provided in the 1964 U,S, Supreme
<br />Court decree in Arizona v. California,
<br />
<br />Consistent with the above determinations and -in accordance with other provisions of "The
<br />Law of the River," the AOP was developed with "appropriate consideration of the uses of
<br />the reservoirs for all purposes, including flood control, river regulation, beneficial
<br />consumptive uses, power production, water quality control, recreation, enhancement of
<br />fish and wildlife, and other environmental factors" (Operating Criteria, Article 1(2)).
<br />
<br />Since the hydrologic conditions of the Colorado River Basin can never be completely
<br />known in advance, the AOP addresses the operations resulting from three different
<br />hydrologic scenarios: the probable maximum, most probable, and probable minimum
<br />reservoir inflow conditions, River operations under the plan are modified during the year
<br />as runoff predictions are adjusted to reflect existing snowpack, basin storage, and flow
<br />conditions,
<br />
<br />Summary
<br />
<br />Ul),per Basin Delivery. Sufficient water will be released from Glen Canyon Dam during
<br />water year 1994 to equalize, as nearly as practical, the active reservoir contents of Lakes
<br />Powell and Mead on September 30, 1994, in accordance with Article II(3) of the
<br />Operating Criteria unless the minimum objective release criterion in Article II(2)
<br />(10,150 MCM, equivalent to 8,230 MAF(l)) is controlling,
<br />
<br />Lower Basin Uses, Taking into account that the reasonable beneficial consumptive use
<br />requirements of mainstream users in the Lower Division States are expected to be less
<br />than 9,250 MCM (7.500 MAF) and the existing and predicted water supply conditions in
<br />the basin, the "normal" condition is the criterion governing the operation of Lake Mead
<br />for calendar year 1994 in accordance with Article III(3)(a) of the Operating Criteria and
<br />Article II(B)(l) of the decree in Arizona v. California, If it becomes evident that water
<br />needs in the Lower Division States may exceed 9,250 MCM (7,500 MAF), the Secretary
<br />of the Interior will consult with interested parties regarding modification to this AOP,
<br />
<br />Any Lower Division State will be allowed to utilize apportioned, but unused, water from
<br />another Lower Division State, in accordance with Article II(B)(6) of the decree in
<br />Arizona v, California, provided that the calendar year 1994 consumptive use by
<br />mainstream Lower Division States users does not exceed 9,250 MCM (7,500 MAF),
<br />
<br />(1) units of volume used in this document are million cubic meters (MCM), followed by
<br />equivalent million acre feet (MAF)
<br />
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