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000915 United States Department of the Interior IN REPLY REFER TO: BCOO-4632 WTR-4.10 BUREAU OF RECLAMATION Lower Colorado Regional Office P.O. Box 61470 Boulder City, NY 89006-1470 JAN. 28 1999 I' c., - '" ".-.... ." :') FI:'1 0 · 199 ' ..9 C Colorado Wate onservation a.u:rd To: All Interested Persons Subject: "Compilation of Records in Accordance with Article V of the Decree of the Supreme Court of the United States in Arizona v. California Dated March 9, 1964" Enclosed is the compilation of records for calendar year 1997 for the mainstream of the Colorado River downstream from Lees Ferry, including the reservoirs thereon and deliveries to Mexico. These records are prepared in accordance with articles V, YeA), V(B), V(C), V(D), and V(E) of the decree of the Supreme Court of the United States in Arizona v. California, dated March 9, 1964, as supplemented or amended. Detailed compilations and original records furnished by water users, the Geological Survey, our area offices, and other appropriate entities, as well as quantity computations and documented methodologies are available for inspection by interested persons during normal office hours of the Boulder Canyon Operations Office in Boulder City, Nevada, Based upon requests, duplicate copies of these records may be made available for inspection at additional locations convenient to interested persons. We note that the records for 1997 show that the lower Colorado River basin's basic apportionment of7.5 million acre-feet (mat) was exceeded. Our records indicate the water use in the lower basin in 1997 to be about 8.03 maf Under normal operating criteria, the Article V records would be used to determine, among other things, if individual users of Colorado River water have exceeded their entitlement. In such cases, the records would serve as the basis for requiring reductions in water use. According to the Secretary of the Interior's February 24, 1997, cover letter for the Annual Operating Plan for Colorado River Reservoirs 1997 " . . ,the surplus condition is the criterion governing the operation of Lake Mead for the calendar year 1997." This condition warrants the delivery of mainstream Colorado River water in excess of the 7.5 maf basic apportionment to users in the Lower Division States pursuant to valid contrac1s or entitlements. Monthly summary compilations of actual water use to date by the users of significant amounts of water, and forecasts of end-of-year total use, are being sent to water contractors and other interested persons having requested these compilations. It is our hope that monthly use information will provide an opportunity for each water user to monitor water use and keep such use within their contractual entitlement.