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<br />Consistent with the above determinations and in accordance with other provisions of "The Law
<br />of the River," the AOP was developed with "appropriate consideration of the uses of the
<br />reservoirs for all purposes, including flood control, river regulation, beneficial consumptive uses,
<br />power production, water quality control, recreation, enhancement of fish and wildlife, and other
<br />environmental factors" (Operating Criteria, Article 1(2)),
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<br />Since the hydrologic conditions of the Colorado River Basin can never be completely known in
<br />advance, the AOP addresses the operations resulting from three different hydrologic scenarios:
<br />the probable maximum, most probable, and probable minimum reservoir inflow conditions,
<br />River operations under the plan are modified during the year as runoff predictions are adjusted
<br />to reflect existing snowpack, basin storage, and flow conditions,
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<br />Summary
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<br />Upoer Basin Deliverv, Storage equalization and the avoidance of spills will control the annual
<br />releases from Glen Canyon Dam in accordance with Article II(3) of the Operating Criteria unless
<br />the minimum objective release criterion in Article II(2) is controlling, Downstream Lower Basin
<br />deliveries and/or flood control parameters are expected to control the releases from Hoover
<br />Dam,
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<br />Lower Basin Uses, Taking into account (I) the existing water storage conditions in the basin,
<br />(2) the most probable near-term water supply conditions in the basin, and (3) that the beneficial
<br />consumptive use requirements of Colorado River mainstream users in the Lower Division States
<br />are expected to be more than 9,250 MCM (7,5 MAP), the surplus condition is the criterion
<br />governing the operation of Lake Mead for calendar year 1998 in accordance with Article
<br />III(3)(b) of the Operating Criteria and Article II(B)(2) of the decree in Arizona v, California,
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<br />Any Lower Division State will be allowed to utilize water apportioned to, but unused by, another
<br />Lower Division State, in accordance with Article II(B)(6) of the decree in Arizona v, California,
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<br />1944 Mexican Water Treaty Deliverv, A volume of 2,096 MCM (1.7 MAF) of water may be
<br />scheduled for delivery to Mexico during calendar year 1998 in accordance with Article IS of the
<br />1944 Mexican Water Treaty and Minute No, 242 of the International Boundary and Water
<br />Commission,
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<br />September 3, 1997
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