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<br />Lower Basin
<br />Water Year 1986
<br />
<br />The total energy delivery to the Hoover allottees during the
<br />1986 operating year (June 1, 1985 - May 31, 1986) was
<br />8,225,849,728 kilowatt-hours (kWh). Of that amount,
<br />4,316,329,728 kWh was secondary energy in excess of contract
<br />defined firm energy.
<br />
<br />The remote control operation of Davis and Parker
<br />Powerplants, which first began during water year 1982,
<br />continued without event. These generator units are computer
<br />operated from the Department of Energy's Phoenix Dispatch
<br />Office, using hourly gate opening and megawatt schedules
<br />input and modified by Reclamation's Water Scheduling
<br />Branch in Boulder City, Nevada.
<br />
<br />A contract was awarded in water year 1985 for modification
<br />and repair work in both the Nevada and Arizona spillway
<br />tunnels at Hoover Dam. The work will consist of construction
<br />of slotted ring air-inducing devices in the inclined sections of
<br />the spillway tunnels and the repair of tunnel concrete lining.
<br />Work on the Nevada spillway began in October 1985 and was
<br />completed August 1986. The Arizona spillway work is
<br />scheduled to be completed in water year 1987.
<br />
<br />Scheduled maintenance at Hoover Oam for water year 1986
<br />included normal replacements of stators, thrust bearings,
<br />water pipes, and transformers.
<br />
<br />Water Year 1987
<br />
<br />I
<br />
<br />In operation studies of Lake Mead and Lake Powell for the
<br />Hoover operating year, which ends May 31,1987, the amounts
<br />released at Hoover Dam have been projected to satisfy both
<br />downstream water requirements, including diversions by
<br />MWD, while also complying with the overall requirements to
<br />meet Compact, flood control, and operating criteria release
<br />provisions. The water scheduled to be released will generate
<br />100 percent of contract defined firm energy, plus secondary
<br />energy. The estimated monthly Hoover releases during the
<br />operating year total 15.2 MAF. ft is estimated that generation
<br />from these Hoover releases, along with the Hoover to
<br />Parker-Davis interchange, will result in delivery to the
<br />allottees of about 7.3 billion kWh of c1ectrical energy. A
<br />
<br />$7,637,385 Reclamation contract has been awarded for
<br />uprating generators N-3 and N-4 at Hoover Dam in Nevada.
<br />The contract was awarded to General Electric Company of
<br />Denver, Colorado. Work will begin in 1987 and is scheduled
<br />to be completed in 1987.
<br />
<br />Principal work under the contract includes conducting a study
<br />of the existing generator design, furnishing and installing
<br />necessary new components, and modifying the two
<br />generators, as required to accomplish the proposed uprating.
<br />The objective is to uprate the generators by the optimum
<br />amount, based on water availability and economic feasibility.
<br />Studies show that sufficient water, head, and turbine capacity
<br />are available to produce significantly more generator output
<br />than the existing generator ratings will allow. The generators
<br />were manufactured by Westinghouse. Generator N-3 was
<br />installed in 1937 and generator N-4 in 1936.
<br />
<br />An additional $10,620,722 contract has been recently
<br />awarded, also to the General Electric Company of Denver,
<br />Colorado, to uprate generating units AI, A2, A6, and A 7 at
<br />Hoover Dam in Arizona. After starting work on those units,
<br />the contractor will have 2,years to complete the job. Upon
<br />completion of this contract, 8 of the 17 generating units in the
<br />power plant will have been uprated.
<br />
<br />The Hoover Uprating Program was authorized by the Hoover
<br />Powerplant Act of 1984 (Act), which finalized a historic
<br />three-State agreement on the marketing of Hoover power
<br />after the current contracts terminate on June 1, 1987. The Act
<br />also requires that the Hoover Uprating Program be
<br />undertaken with funds advanced by the non-Federal
<br />purchasers of Hoover power.
<br />
<br />Scheduled for completion in 1992, the Hoover Uprating
<br />Program will be funded with an estimated $126 million from
<br />non-Federal sources in Arizona, California, and Nevada.
<br />Arizona and Nevada will each fund about 37 percent of the
<br />costs, with the remainder being financed by nine
<br />municipalities in southern California.
<br />
<br />The Hoover Uprating Program will result in a generation
<br />increase to an anticipated output exceeding 2,000 megawatts.
<br />
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