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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 />001130'7 <br /> <br />. <br /> <br />. <br /> <br />will be dependent on the water demands in the given year. reduced by the conservation <br />opportunities the entities have to provide additional-supplies in dry years. The dry year options <br />are expected to include land fallowing opportunities, groundwater importation, and recovery of <br />, <br />water that had been previously banked within California or possibly in the Arizona Water Bank. <br />The combination of these programs may yield as much as 250.000 acre feet per year in California. <br />SNW A would probably rely on recovery of water from the Arizona Water Bank as its dry year <br />option and would be required to reduce its surplus demand above 300.000 af by one-half. <br />The partial M&I surplus tier will be implemented when Lake Mead storage is between <br />elevation 1125 and elevation 1145 (15.585 maf). The volume of the partial M&I surplus will vary <br />yearly and will decline over time as California proceeds toward its 4.4 maf legal entitlement. It <br />will be equal to the volume needed to deliver 1.212 mafthrough the MWD Colorado River <br />Aqueduct. considering the amount of core transfer programs already in place. less 250.000 af. <br />When California has reduced its demand to 4.65 maf or lower. the extra water made available . <br />through the partial M&I surplus tier will be zero. <br />3.) Full M&I Surplus <br />During periods when Lake Mead content is above elevation 1145. but less than the <br />amount which would initiate a surplus under the space building or flood control criteria described <br />below. limited surpluses would be declared that would meet the goal of keeping the Colorado <br />River Aqueduct full and meeting the needs of the SNW A. The volume ofthis surplus. as it relates <br />to the Colorado River Aqueduct. would be the difference between the amount of water necessary <br />to keep the aqueduct full (1.212 maf) and the amount that MWD already has available to it from <br />sources within California' s 4.4 maf basic apportionment. MWD' s available supply includes its <br />own priority 4 and 5 entitlements under the Seven Party Agreement. the amount conserved <br />through core conservation programs that have been implemented. and any unused apportionment <br />from more senior California contractors. The overall Lower Basin surplus. i.e. the amount of <br />delivery above 7.5 maf. would also be reduced to the extent there is Arizona or Nevada unused <br />basic apportionment. The volume of water available to SNW A would be that amount needed for <br />M&I purposes within SNWA's service area above Nevada's basic apportionment of 0.3 maf. <br />Current projections indicate that SNW A may not need additional surpluses until about the year <br /> <br />8 <br />
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