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Show 1 Colorado River flow still dovn of vailablo storage of 57 percent per-cent of its capacity. The lake is scheduled to rise slowly during dur-ing the remainder of the year. Required compact releases from Lake Powell will probably prob-ably exceed Lower Basin water wa-ter requirements during the next 3 years so we can expect a nominal rise in Lake Mead during this period. May has been the third consecutive con-secutive month of subnormal precipitation in the Colorado River Basin above Leo.s Ferry, causing the April-July runoff forecast to fall to 7.4 million acre-feet or 87 percent of normal, nor-mal, the Bureau of Reclamation Reclama-tion announced this week. An even lower runoff forecast is avoided only by the presence of above normal snow accumulations accum-ulations in the high mountains. moun-tains. Another milestone was reached Uist month in the utilization util-ization of water of the Colorado Colo-rado River in the Upper Basin. On Thursday night, May 29, 19ti9, water stored in Lake Powell reached elevation 3570 feet, which is "rated head" for the powerplant located at the toe of Glen Canyon Dam. "Rated "Rat-ed head" is the lowest level at which water flowing through the turbines can drive the generators at their name-plate name-plate capacity. With normal rainfall, it is expected that Lake Powell's water surface should reach an all-time high in July at about elevation 3580 feet with a live storage of a-bout a-bout 10,290,000 acre-feet. Planned releases from Lake Powell for water year 19(i9 are about 8.8 million acre-feet. For the next 3 years thereafter annual an-nual releases should be near this amount in order to deliver Colorado River Compact requirements re-quirements to the Lower Basin. Bas-in. The entire release will bo used to generate power for power customers in both the Upper and Lower Basins. Lake Mead is now about elevation el-evation 1141 feet or bout 6 feet higher than a year ago. It I contains 15.5 million acre-feet |