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Last modified
7/28/2009 11:18:29 PM
Creation date
10/11/2006 10:31:33 PM
Metadata
Fields
Template:
Water Supply Protection
File Number
8042.A
Description
Section D General Studies - Other States
State
AZ
Date
12/4/1998
Author
AZ,CO,NV,NM,UT,WY
Title
Arizona Water Protection Fund - Meetings/Newletters - Proposal for Interim Lake Mead Reservoir Operation Criteria Related to a Surplus, Normal, and shortage Year Declarations
Water Supply Pro - Doc Type
Report/Study
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<br />l)uiiJOG <br /> <br />. <br /> <br />. <br /> <br />IV. Prooosed Lake Mead Reservoir Interim Ooeratiol! Criteria <br />A. Introduction <br />The December 17,1997, Draft of the California 4.4 Plan outlined a proposal for Lake <br />Mead reservoir operations. The Six States agree with many of the concepts set forth in that <br />proposal. However. there are several areas in which those concepts deviate from the principles <br />discussed above and thus are in need of further definition. discussion and clarification. This <br />section briefly identifies those areas and proposed additional concepts. <br />The Draft California 4.4 Plan describes three levels of surplus criteria. Levell is a spill <br />avoidance strategy based on anticipated runoff. Level 2 is a strategy that attempts to keep the <br />Colorado River Aqueduct full during the transition period during which agricultural conservation <br />measures are being implemented within California. Level 3 is similar to Level 2, except that the <br />surplus supplies are more limited. and California is required to use additional alternate supplies <br />including dry year land fallowing and groundwater basin pumping options if it wishes to keep the <br />Aqueduct full. <br />The Six State proposal envisions a set of interim criteria for reservoir operation in which <br />the various levels are less distinct. The Six State proposal seeks to achieve a balance between the <br />need to release water to build storage space to avoid future flood control regulation dictated <br />releases and the need to carry over as much water in storage as possible to sustain future water <br />deliveries through droughts. Similar to the California proposal. the Six States are willing to <br />provide California with additional water for a specified period of time while conservation <br />measures are being implemented. The States believe that when California is successful in <br />implementing programs for conservation transfers to M&I uses it will be able to meet its future <br />needs within its basic 4.4 maf annual entitlement and. therefore. there will be no need to continue <br />the proposed form of interim reservoir operating criteria in the future. <br />Underlying all levels of the interim criteria is the commitment to attempt to meet the needs <br />of southern California municipal and industrial water users which are causing the state to use <br />more than its 4.4 maf basic apportionment. While this volume is expected to reduce continuously <br />over time, it is still a significant amount of water, especially in the early years of the Plan's <br />implementation. The Six State proposal also includes water for municipal uses in Southern <br /> <br />6 <br />
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