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<br />otioZ!'filabilit;V. Water runoff forecasts generally assume
<br />normal precipitation following the forecast date, a situation
<br />
<br />;F~;~.fr:
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<br />,<,.e,_,
<br />
<br />,.
<br />
<br />which may not occur. Therefore, conservation of electric
<br />
<br />
<br />energy will ,permi t storage accumulations now, as a means of
<br />
<br />advanced planning for unforeseen water supply conditions in
<br />
<br />the winter 1977/78 period. Also, initiating the conservation
<br />
<br />ethic now s~ould serve to reduce the effect on hydroelectric
<br />
<br />:".~."
<br />
<br />generation if reservoirs fail to refill for use in the next
<br />hydro planning year. PG&E currently is using thermally
<br />
<br />generated en~rgy from southern California to minimize water
<br />
<br />The electric utility systems in California, Oregon,
<br />
<br />
<br />withdrawals, so as to preserve the water for later use.
<br />
<br />Idaho and Washington are those expected to experience
<br />
<br />the greatest impact of the current drought conditions.
<br />For the California systems, cumulative voluntary conserva-
<br />
<br />tion measures are projected to effect an average monthly
<br />
<br />saving of 5.5 percent, or about 2658 GWh during the June-
<br />
<br />September period.
<br />
<br />If a savings of this amount can be
<br />
<br />
<br />effected and used to reduce hydroelectric energy utilization
<br />
<br />during the four month period, 27.6 percent of the projected
<br />hydro-electric energy production could be avoided, and
<br />
<br />
<br />oil-fired generation requirements could also be reduced.
<br />
<br />California systems have already initiated 3 percent voltage
<br />
<br />reduction prdgrams on commercial and residential
<br />
<br />46
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