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Central Arizona Project Infonnation on 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 will 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 most 'of CAP's Colorado River water entitlement to be pumped into the Phoenix area and stored during the winter months when energy and water needs are low, and then released for delivery in the summer months when energy and water needs are high, Revenues associated with marketing of power available due to this operating plan are an important part of Central Arizona Water Conservation District's financial plan, Firm power contracts for peaking power have been executed for a major portion of the available electrical capacity normally used for pumping. The dam and P-G Plant are scheduled to be fully operational in 1995, but initial pump tests and reservoir filling began in the fall of 1992. Pump and generator testing continued through 1993, with the goal of completing all tests before the summer of 1994. In order to facilitate electrical and mechanical testing; including high-head pumping, high-speed generation, and evaluation of right abutment grouting (all required for New Waddell construction contract completion); the active conservation storage space in New Waddell Reservoir must be virtually full, To complete this testing before the summer of 1994, Central Arizona Water Conservation District will have to pump at or near maximum CAP system capacity through January, 1994, This will result in a full reservoir available for completion of all testing through February and March, During April through September, it is anticipated that most CAP water needs downstream from the New Waddell turnout will be satisfied with CAP water stored in New Waddell Reservoir, Beginning in October, 1994, Colorado River water will be pumped through the CAP system into New Waddell Reservoir for use during the summer of 1995, Total 1994 CAP diversions from the Colorado River are not expected to exceed 616 MCM (,500 MAP), Senator Wash and Laguna Reservoirs Water storage operations at Senator Wash Reservoir allow regulation of water deliveries to United States irrigation agencies and Mexico, The reservoir is operated to prevent Colorado River flows from exceeding Mexican Treaty requirements at Morelos Dam; and to reduce these excess flows when practicable during rainstorms or other unusual events, Operational objectives at and below Laguna Dam are to conserve water, control sediment, and to maintain the river channel. Releases from Imperial Dam are reregulated by Laguna Reservoir to maintain river flows downstream near Yuma. Laguna releases combined with agricultural seepage and drainage provide a continuous live stream serving recreational and fish and wildlife purposes from Laguna Dam to Morelos Dam. Occasionally higher than normal releases are required from 14 I I . I I I I I I I eI t I I I I I I -, I