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WSP06657
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Last modified
1/26/2010 2:23:46 PM
Creation date
10/12/2006 1:47:30 AM
Metadata
Fields
Template:
Water Supply Protection
File Number
8210.120.90.B
Description
7 Basin States/10 Tribes
Basin
Colorado Mainstem
Date
8/28/1991
Author
State of California
Title
Conceptual Approach for Reaching Basin States Agreement on Interim Operation of Colorado River System Reservoirs, California's Use of Colorado Riber Water Above its Basic Apportionment and Implementa
Water Supply Pro - Doc Type
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<br />plan of operation for the Colorado River System reservoirs. Within <br />that plan the Secretary must make several determinations including: <br />(1) the projected operation of the Colorado River reservoirs to <br />satisfy project purposes under varying hydrologic and climatic <br />conditions: (2) the quantity of water considered necessary as of <br />September 30 of each year to be in storage in the Upper Basin <br />reservoirs as required by Section 602(a) of Public Law 90-537: (3) <br />water available for delivery pursuant to the 1944 Mexican Water <br />Treatv and Minute No. 242 of the International Boundary and Water <br />Commission (IBWC): (4) the quantification of reasonable beneficial <br />consumptive use requirements of mainstream users in the Lower Basin <br />that will be met under a "normal", "surplus", or "shortage" <br />condition as outlined in Article III of the Operating Criteria: and <br />(5) the quantification of water apportioned to but unused by one or <br />more Lower Division states that can be used to satisfy reasonable <br />beneficial consumptive use requests of mainstream users in other <br />Lower Division states as provided in the Decree in Arizona v. <br />California (376 U.S. 340). <br /> <br />In making these determinations, the Secretary of the Interior <br />must consider all applicable laws and relevant factors as specified <br />in the Operating Criteria, including but not limited to: <br /> <br />(1) The requirements stated in Article 111(1) of the <br />Operating Criteria: <br />(2) Requests for water by holders of water delivery contracts <br />with the United States, and of other rights recognized in <br />the Decree in Arizona v. California: <br />(3) Actual and forecast quantities of active storage in Lake <br />Mead and the Upper Basin storage reservoirs: <br />(4) Estimated net inflow to Lake Mead; <br />(5) Historic streamflows, including the most critical period <br />of record: <br />(6) Probabilities of water supply; <br />(7) Estimated future depletions; <br />(8) Priorities set forth in Article II(A) of the Decree in <br />Arizona v. California; and <br />(9) The purposes stated in Article I (2) of the Operating <br />Criteria. <br /> <br />Currently, the process by which the Secretary has considered <br />the above relevant factors is, for the most part, undefined and <br />therefore it is not clear what forms the technical basis for the <br />Secretary's determinations. This has led to confusion and <br />misunderstanding as to what these determinations really mean and <br />how they are used to guide the operation of the Colorado River <br />System reservoirs. This has become critical now that requests for <br />water to meet reasonable beneficial consumptive use from the <br />mainstream in the Lower Division states can exceed 7.5 maf. <br /> <br />2 <br />
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