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<br /> <br />_..I, <br /> <br />. <br /> <br />. <br /> <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />ANNUAL OPERATING PLAN FOR <br />COLORADO RIVER SYSTEM RESERVOIRS <br />WATER YEAR 1991 <br /> <br />INTRODUCTION <br /> <br />Authority <br /> <br />This document provides a summary of the annual operating plan (AOP) for water year <br />1991 for the Colorado River system. The 1991 AOP was developed in accordance with <br />Section 602 of Public Law 90-537, and the Criteria for Coordinated Long-Range <br />Operarion of Colorado River Reservoirs (Operating Criteria), promulgated by the <br />Secretary of the Interior pursuant thereto and other applicable statutes. In accordance <br />with Public Law 90-537 and the Operating Criteria, the AOP must be administered <br />consistent with applicable Federal laws, the 1944 Mexican Water Treaty, interstate <br />compacts, court decrees, and other documents relating to the use of the waters of the <br />Colorado River, which are commonly known as "The Law of the River. " <br /> <br />The Operating Criteria and Section 602 of Public Law 90-537 mandate consultation <br />with representatives of the Governors of the seven Basin States and the Upper Colorado <br />River Commission relative to annual plans for operation of the Colorado River <br />reservoirs. The 1991 AOP was prepared by the Bureau of Reclamation in consultation <br />with the seven Basin States Governors' representatives, the Upper Colorado River <br />Commission, and others. <br /> <br />Purpose <br /> <br />The purposes of the AOP are to define (1) the projected operation of the Colorado <br />River reservoirs to satisfy project purposes under varying hydrologic and climatic <br />conditions; (2) the quantity of water considered necessary as of September 30, 1991 to <br />be in storage in the Upper Basin reservoirs as required by Section 602(a) of Public Law <br />90-537; (3) water available for delivery pursuant to the 1944 Mexican Water Treaty and <br />Minute No. 242 of the International Boundary and Water Commission (IBWC); (4) <br />whether the consumptive use requirements of mainstream users in the Lower Basin will <br />be provided under a "normal," "surplus" or "shortage" condition as outlincd in Article <br />III of the Operating Criteria; and (5) whether apportioned but unused water by one or <br />more Lower Division states exists and can be used to satisfy beneficial consumptive llse <br />requests of mainstream users in other Lower Division states as provided for in the <br />decree in Arizona v. California. <br /> <br />Consistent with the above determinations and in accordance with other provisions of <br /> <br /> <br />- <br />