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<br />River <br />Regulation <br /> <br />23 <br /> <br />During water year 1975, 9,255,000 <br />acre. feet were released from Glen <br />Canyon Dam as measured at the <br />Lees Ferry, Arizona, gaging sta. <br />tion. For the I-year and IO.year <br />period, ending September 30, <br />1975, respectively, 9,274,000 acre. <br />feet and 87,211,000 acre.feet <br />passed the compact point at Lee <br />Ferry, Arizona. The annual release <br />of 9,687,000 acre. feet from Lake <br />Powell scheduled for the year <br />ending September. 3D, 1976, is <br />based on the most probable runoff. <br />When added to the flow of the <br />Paria River this will result in <br />Upper Basin delivery of about <br />89.0 million acre.feet lor the <br />IO-year period ending September <br />30, 1976, and will equate water <br />storage in Lake Mead and Lake <br />Powell. <br /> <br />Water releases scheduled for the <br />Colorado River storage project <br />and participating project reser. <br />voirs were planned to accommo- <br />date all of the multiple purposes <br />for which the project was de. <br />signed, in addition to the many <br />day-to-day demands developed <br />throughout the year. <br /> <br />Normally, daily releases are made <br />from the storage reservoirs in the <br />Lower Basin to meet the incoming <br />orders of the water user agencies <br />and all water passes through the <br />turbines. The daily releases are <br />regulated on an hourly bas-is to <br />meet, as nearly as possible, the <br />power loads of the electric power <br />customers. Minimum daily flows <br />are provided in the river to main- <br />tain fishery habitat. Adjustments <br />to the normal releases are made <br />when possible to provide more <br />satisfactory conditions- for water. <br />oriented recreation activities, to <br /> <br />provide transport for riverborne <br />sediment to desiIting facilities, <br />and La provide a degree of control <br />of water quality. <br /> <br />River regulation below Hoover <br />Dam was a~cornplished in a man. <br />ner which resulted in delivery to <br />Mexico of 226,503 acre-feet in <br />excess of minimum Treaty re- <br />quirements during water year <br />1975. Of tbat quantity, 213,468 <br />acre. feet were delivered for <br />salinity control pursuant to provi. <br />sions of minute No. 242 of the. <br />Mexican Treaty. <br /> <br />