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<br />POMrplant.
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<br />r BOlin. Weter Veer 1883
<br />)tal energy delivery to the Hoover
<br />.es during the 1983 operating year (June
<br />12 - May 31, 1983) was 3,648,598,541
<br />.tt-hours (kWh). There wes no
<br />dary or disputed energy dallvered to the
<br />er allotlees during the operating year.
<br />
<br />'emote control operation of Davia and.
<br />Ir Powerplants which first began durIng
<br />year 1982 continued without event.
<br />. generator units are computer operated
<br />the Department of Energy's Phoenix
<br />Itch Otflce, using hourly gate opening
<br />legawalt .cheduleslnput and modified
<br />clamatlon's Water Scheduling Branch In
<br />ler City, Nevada.
<br />
<br />lCessary maintenance at Hoover, Parker,
<br />lavls Powerplants was performed In
<br />year 1983. The maintenance schedule
<br />oils Dam during water year 1983 was
<br />d up because of anticipated high water
<br />les during water year 1984. Davis Unit 5
<br />hut down during the spring of 1983 so
<br />i1e draft tube and penstock gates could
<br />:ondltloned at that time. This action,
<br />with adverse weather conditions
<br />Intered during the reconditioning at the
<br />on Davis Unit 3, forced rescheduling of
<br />enance on the other units (see chart).
<br />
<br />r year 1983 was the first time since Davis
<br />Nas built that Its spillway gate had to be
<br />It wasalso the first tlmeslnce1841 that
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<br />the Hoover Dam spillways have been used.
<br />There was no known damage at Davis Dam.
<br />and only minor damage was done to the
<br />Hoover Nevada spillway tunnel during the
<br />high releases at 1883.
<br />
<br />Each of the four Parker Powerplant units In
<br />turn were out of service for short periods of
<br />time during February or March 1883 for
<br />governor ballhead and 011 motor vibrator
<br />InstallatIon. These modifications were
<br />modernization Improvements to the
<br />governors.
<br />
<br />Combined flows otup to 40,000 cfs through
<br />the Parker Dam spillway and generator units
<br />during water year 1983 caused considerable
<br />damage to an access road Immediately
<br />downstream from the powerplant. The dam
<br />and powerplant themselves were unaffected.
<br />All generators at Parker Powerplant have
<br />experienced sustained use beginning May 5,
<br />1983.
<br />
<br />Weter Veer 1984
<br />
<br />In operation studies of Lake Mead and Lake
<br />Powell for the Hoover operatIng year, which
<br />ends May 31,1984, the amounts released at
<br />Hoover Dam have been projected to satisfy
<br />both downstream water requirements,
<br />Including diversion by the Dlltrlct, while alIa
<br />complying with the overell requlrement8to
<br />meet compact, flood control and operating
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<br />Siphon Drop generator nsl.r Y~ma;.Arlzona.
<br />
<br />criteria release provisions. The water
<br />scheduled to be released will generate 100
<br />percent of contract defined firm energy, plus
<br />secondary energy. The estimated monthly
<br />Hoover releases during the operating year
<br />total 19.55 million acre-teet. It Is estimated
<br />that generation from these Hoover releases,
<br />along with the Hoover to Parker-Davis
<br />Interchange, will result In delivery to the
<br />allottees of about 8.34 billion kWh of electrical
<br />energy.
<br />
<br />Major maintenance at Davis and Parker
<br />Powerplants has not been scheduled for water
<br />year 1984 because of projected high water
<br />releases. Major maintenance Is scheduled at
<br />Hoover Powerplant, but at a reduced level.
<br />
<br />Paradox gate overhauls at Hoover Dam will
<br />require short(one or two day) penstock
<br />outages at the upper Nevada penstock and
<br />both Arizona penstocks during January,
<br />February, April andlorJuna 1984.
<br />
<br />The tollowlng charts Illustrate Lower Basin
<br />generator unit outage schedules for water
<br />year 1983 and projections for water year 1984.
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