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<br />picked up early in May and peaked at nearly 13,900 c. f. s. on June 23.
<br />nill Reser':oir fillecllo a maximum seasonal stor"~c content of nearly
<br />acre-fE'et late in June.
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<br />435,000
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<br />The April-July inflow to Buffalo Bill Reservoir was 1,00:1,000 acre-feet which
<br />WaS 139 percent of average. Power releases were restricted to the Shoshone Plant
<br />throughout most of the year due to extended maintenance on the Heart Mountain
<br />unit. Carryover stor:l~e in Buffalo Bill Reservoir was 358,000 acre-feet at the
<br />end of the wate,' year which was well above normal.
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<br />The Omal1a Di strict of the Corps of Engi neers estimated that Buffalo Bill Reservoir
<br />prenmted $297, .300 .in flood damages, including $10,000 on the Yellowstone,
<br />$2B2,300 on the Missouri River, and $5,000 on the Shoshone River.
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<br />System Power Operation
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<br />Total Western Division System generation and import of energy for Water Year
<br />1971 was near that anticipated in the reasonable maximum Annual Operating Plan.
<br />System power load was generally a little above the estimated levels during the
<br />winter period and a little below the estimated level during the summer period.
<br />System power production was generally much above normal due to exceptional
<br />water supply and spill conditions throughout much of the system.
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<br />Power production was much above normal at all powerplants in the North Platte
<br />area due to heavy transfer of water throughout that system this past season. Power
<br />production was also well above normal at Boysen and Green Mountain powerplants
<br />due to excellent water supply in those areas. With high carryover storage and
<br />limited water demand on the eastern slope, power production was below normal
<br />on the Colorado-Big Thompson project.
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<br />Total system gross power generation for Water Year 1971 was 1,858 gigawatt
<br />hours which was better than 116 percent of the la-year average. About 147 giga-
<br />watt hours of this total generation was surplus energy during the April-July period.
<br />A total of 422 gigawatt hours of energy was imported during the balance of the
<br />season, primarily from the P-SMBP Eastern Division, to meet system load,
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