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00134~ . . United Sfates Department of the Wlterior BUREAU OF RECLAMATION - . Lower Colorado Regional Office - . P.O. Box 61470 .~ IN REPLY REFER TO: Boulder City, NV 89006-1470 CIR LC-460 sc ASC WTR-4.lO F I APR 2 9 199Z , I L E " To: All Interested Persons From: Regional Supervisor of Water, Land, and Power Subject: Estimate of 1992 Colorado River Water Use (Water Accounting) Enclosed are the forecasts of yearend 1992 water use for all users in the lower basin. The forecast currently indicates that total mainstream Colorado River water use by Lower Division States is below the 7.5-million-acre-foot limit established in the Annual Operating Plan for 1992. Projected 1992 water use is based on actual use during January through March 1992, users' historical use patterns, and scheduled use provided by users. The projected use for each user is being provided so that water users can monitor their use of water and avoid any overuse during the year. Because seasonal agricultural requirements can vary significantly from year to year, it is emphasized that all users should promote water conservation and plan to keep water use within their annual entitlement. We expect the actual use data contained in the projections will provide the basis for the "Compilation of Records in Accordance with Article V of the Supreme Court of the United States in Arizona v. California" (Article V records) for calendar year 1992. As a result, we are asking that each user review the actual use data and notify us if any of the records appear to have errors. Your review of the accuracy of the records during the year will help us complete the final Article V records in a timely fashion. The final 1992 Article V records will be used to determine, among other things, the extent to which any individual user of Colorado River water may have exceeded their entitlement. In such cases, the final records will serve as the basis for requiring reductions in water use in future years in order to offset any such inadvertent overruns that may have occurred. It is anticipated that deliveries to Mexico at Morelos Dam will exceed Mexico's water orders in May and June by 20,000 acre-feet. This is due to flood control releases from Painted Rock Dam on the Gila River to prevent inundation of private lands within the reservoir storage area and which exceed amounts which can be delivered in satisfaction of Mexico's d~livery schedules. The Gila River enters the Colorado River below the Bureau of Reclamation's' reservoirs and cannot be stored.