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LAKE HAVASU (COLORADO RIVER) ~ Water Year 1992 At the beginning of water year 1992, the water level of Lake Havasu, impounded by Parker Dam, was at an elevation of about 447 feet with an active storage of approximately 556,000 acre-feet. The reservoir was regulated between elevations 446 feet and 449 feet through April providing vacant space for runoff from the drainage area between Davis and Parker Dams. The water level was then raised to an elevation of 450 feet in early May with an active storage of about 610,000 acre-feet. At the end of the water year, Lake Havasu was at an' elevation of about 446.3 feet with an active storage of 548,000 acre-feet. During the water year, approximately 6,035,000 acre-feet were released at Parker Dam, all of which passed through the turbines for power production. In addition to the releases from Parker Dam, approximately 1,184,000 acre-feet were diverted from Lake Havasu by The Metropolitan Water District of Southern California. Diversions from Lake Havasu for the Central Arizona Project were 522,000 acre-feet during the water year. Space in the top 10 feet of Lake Havasu (about 180,000 acre-feet) is reserved by the United States for control of floods and other uses, including river regulation. Normally, only about the top 4 feet, or 77,000 acre-feet of space, have been ACTUAL RELEASES 1992 THOUSAND ACAE-FEI!T tOOO ,/ ....-1. \ / ~ "- / '" ./' ./' ... ... 0.. 2.. . ;p +0'" 0"-" \..+ (f-. +-1' ~~ +i:- ~+ ~.. I' .,<3 used for this purpose since the Alamo Reservoir on the Bill Williams River has been in operation. Central Arizona Project - New Waddell Dam Operations A key feature of the Central Arizona Project (CAP) is New Waddell Dam and Reservoir. This reservoir is located just northwest of the Phoenix metropolitan area and win serve as the primary regulatory storage facility for the CAP. Colorado River water will be pumped into and released from the reservoir via the Waddell Pumping-Generating Plant (P-G Plant). The P-G Plant consists of four 2-speed pump generator units and four adjustable-speed pumping units. New Waddell Dam and P-G Plant will allow CAP to pump and store Colorado River water in the Phoenix area during the winter months when energy and water demands are low, and then release for delivery in the summer months when energy and water demands are high. The dam and P-G Plant are scheduled to be fully operational in 1995, with initial pump tests and reservoir filling beginning in the fall of 1992. All 'eight units are scheduled to be operational by the end of August 1993. Current projections indicate that CAP's use could increase by approximately 400,000 to 500,000 acre-feet as a result of filling New Waddell reservoir during calendar year 1993. LAKE HAVASU Reservoir Acre-feet Elevation, feet Storage Capacity Rated Head Minimum Power Surface Area, full Reservoir Length, full 619,400 619,400 439,400 450 450 440 20,400 Acres 35 Miles Powerplant Number of Units Total Capacity 4 120,000 KW 19