WSP03527

• File Number: 822.600.10
• Description: Colorado River Annual Operating Plan - Annual Reports
• Basin: Colorado Mainstem
• Date: 1/1/2003
• Author: USDOI/BOR
• Title: Annual Operating Plan
• Water Supply Pro - Doc Type: Annual Report

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Consistent with the abo\"e detenninations and in accordance with other applicable pro\"isions of
"The Law of the River." the AOP was developed with "appropriate consideration of the uses of the
reservoirs for all purposes. including flood control. n'"cr regulation, beneficial consumptive uses.
power production. water quality control. recreation. enhancement of fish and wildlife. and olher
environmental factors" (Operating Criteria. Article 1(2)).

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Since the hydrologic conditions of the Colorado River Basin can never be completely known in
ad\'ance. the ADP addresses the operations resulting from three different hydrologic scenarios: the
probable maximum. most probable, and probable minimum reservoir inflow conditions. River
operations under the plan are modified during the year as runoff predictions are adjusted to rellect
existing snowpack. basin storage. and llow conditions,

Summary

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Upper Basin Deliver.', The minimum objecti\'e release criterion will conlrol the annual release from
Glen Canyon Dam during water year 2003 in accordance with Article II(2) of the Operating Criteria
unless spill avoidance and/or the storage equalization criteria in Article 11(3) is controlling.

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Lower Basin Deliver\'. Downstream deliveries are expected to contra] the releases from Hoover
Dam.

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Taking into account (1) the existing water storage conditions in the basin. (2) the most probable near-
tenn water supply conditions in the basin. and (3) that the beneficia] consumptive use requirements
of Colorado River mainstream users in the Lower Division States are expected to be more than 7.5
million acre-feet (maO or 9.250 million cubic meters (mcm). and specifically (4) the Interim Surplus
Guidelines. \....hich implement Article 1II(3)(b) of the Operating Criteria. the Full Domestic Surplus
condition is the criterion governing the operation of Lake ~'lead for calendar year 2003 in accordance
with Article 11I(3)(b) of the Operating Criteria. Anicle 1I(B)(2) of the Decree. and See lions 2(B)(2)
and 7 of the Interim Surplus Guidelines,

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lfit is detemlined. consistent with Section 5(B) of the Interim Surplus Guidelines. that the California
contractors ha\'e not executed the Quantification Settlement Agreement by' December 31.2002. the
Nonna! condition is the criterion governing the operation of Lake ~tead for calendar year 2003 in
accordance with Anicle 1lI(3)(a) of the Operating Criteria. Artic]e 11(8)( I) of the Decree and the
Interim Surplus Guidelines,

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The suspension of surplus dctenninations under Section 2(8)( 1) and 2(8)(2) of the Interim Surplus
Guidelines will remain in effect until such time as California completes all required actions and
complies with reductions in water use renected in Section 5(C) of the Interim Surplus Guidelines,

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In the event that the California contractors and the Secretary execute said agreements during calendar
year 2003. consistent with Section 5(8) of the Interim Surplus Guidelines. the interim surplus
detcnninations under Sections .2(B)( I) and 2(8)(.2) will be reinstated. following appropriate
consultations, In such event. the Full Domestic Surplus will go\'crn the releases for use in the States

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December 13. .2002

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