<br />Power Operations [Cont.]
<br />Lower Basin
<br />
<br />Water Year 1987
<br />
<br />The tolal energy delivery 10 the Hoover allollees during the
<br />1987 operaling year (June 1, 1986 - May 31, 1987) was
<br />7,287,747,600 kilowall-hours (kWh), Of that amount,
<br />3,343,770,474 kWh was secondary energy in excess of contract
<br />defined firm energy,
<br />
<br />On June 1,1987,lhe United Slates took over the operation of
<br />the Hoover powerplant. The Bureau of Reclamation became
<br />the operator of the power plant and the Western Area Power
<br />Administration the scheduler, contracting officer and
<br />transmitter of the energy generated,
<br />
<br />The period June 1, 1987, through September 30,1987, served
<br />as an interim transition period. During that time,
<br />approximately 1.68 Billion kWh of gross energy was
<br />generated,
<br />
<br />Related regulations include Public Law 98.381 of August 17,
<br />1984 (the Hoover Powerplant Act of 1984) and the 'General
<br />Regulations for the Charges for the Sale of Power From the
<br />Boulder Canyon Project; Final Rule" (Federal Register,
<br />November 28, 1986, 10 CFR Part 9(4),
<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 Western Area Power Administration's
<br />Phoenix District Omce, using hourly gate opening and
<br />megawatt schedules input and modified by Reclamation's
<br />water scheduling 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 consisted 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 began in
<br />September 1986 and was completed in July 1987,
<br />
<br />Scheduled maintenance at Hoover Dam for water year 1987
<br />included normal replacements of stators, thrust bearings,
<br />water pipes, and transformers.
<br />
<br />Water Year 1988
<br />
<br />In .operation sludies of Lake Mead and Lake Powell for the
<br />Hoover operating year, which ends September 30, 1988, the
<br />amounts released at Hoover Dam have been projected to
<br />satisfy both downstream water requirements, including
<br />
<br />diversions by MWD and CAP, while also complying with the
<br />overall requirements to meet Compact, /lood control, and
<br />operating criteria release provisions, The water scbeduled to
<br />be released will generate Schedules A and B energy and in
<br />some months excess energy, Tbe estimated monthly Hoover
<br />releases during Water Year 1988 total 10,7 MAF, It is
<br />estimated that generation from these Hoover releases, along
<br />witll the Hoover ,to Parker-Davis interchange, will result in
<br />delivery to the approved contractors of about 5.0 billion kWh
<br />of electrical energy,
<br />
<br />A $7,637,385 Reclamation contract has been awarded for
<br />uprating generators N-3 ilnd N-4 at Hoover Dam in Nevada,
<br />The contract was awarded to General Electric Company of
<br />Denver, Colorado, Work will begin in 1988 and is scheduled
<br />to be completed in 1988,
<br />
<br />Principal work under lhe 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 tbe 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 addilional $10,620,722 contract has been awarded, also to
<br />the General Electric Company of Denver, Colorado, to uprate
<br />generating units AI., A2, A6, and A7 at Hoover Dam in
<br />Arizona. After starting work on tbose units, lhe contractor will
<br />have 2 years to complete tbe job, Upon completion of this
<br />contract, eight of the 17 generating units in the power plant will
<br />have been uprated,
<br />
<br />The Hoover Uprating Program was autborized by the Hoover
<br />Powerplant Act of 1984 (Act), which froalized a historic
<br />three-State agreement on the marketing of Hoover power
<br />after the original contracts terminated on June I, 1987, The
<br />Act also requires that the Hoover Uprating Program be
<br />undertaken witb funds advanced by the non-Federal
<br />purcbasers 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 pereent of the
<br />costs, with the remainder being financed by nine
<br />municipalities in soutbern California,
<br />
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