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<br /> <br />River Regulation <br /> <br />Colorado River below Davis Dam. Arizona-Nevada <br /> <br />Water release from Glen Canyon Reservoir <br />during Water Year 1974 was 8,259,000 <br />. acre-feet as measured at the Lees Ferry gaging <br />station. The water passing the Compact Point <br />at Lee Ferry totalled 8.270,000 acre-feet and <br />88,773,000 acre.feet for the I-year and 10-year <br />periods ending September 30, 1974, <br />respectively. The annual release of 8,736,000 <br />acre-feet from Lake Powell scheduled for the <br />current year based on most probable runoff <br />when added to the flow of the Paria River will <br />result in Upper Basin delivery of about 86.7 <br />million acre-feet for the 10-year period ending <br />September 30, 1975. <br />Water releases scheduled for the Colorado <br />River Storage Project and participating project <br />reservoirs were planned to accommoda te all of <br />the multiple purposes for which the project was <br />designed plus many day-to-day demands that <br />developed throughout the year. <br />Daily releases are nonnally made from the <br /> <br />storage reservoirs in the Lower Basin to meet <br />the daily orders of the water user agencies and <br />all water passes through the turbines. The daily <br />releases are regulated on an hourly basis to <br />meet as nearly as possible the powerloads of <br />the electric power customers. Minimum daily <br />flows are provided in the river to maintain <br />fishery habitat. Adjustments to the normal <br />releases are made when possible to provide for <br />more satisfactory conditions for water-ori.ented <br />recreation activities, to provide transport for <br />riverborne sediment to desilting facilities, and <br />to provide a degree of control of water quality. <br />River regulation below Hoover Dam waS <br />accomplished in a manner which resulted in <br />delivery to Mexico of only 157,495 acre-feet <br />in excess of minimum Treaty requirements <br />during water year 1974. There were ] 5 I ,486 <br />acre-feet of this quantity which were delivered <br />pursuant to provisions of Minutes Nos. 241 <br />and 242 of the Mexican Treaty. <br /> <br />20 <br />