US Army Corps of Engineers

Bonneville Dam & Lake on Columbia River

December 2019

Day of MonthTotal Generation MWhAverage Generation MWStation Use MWhInflow kcfsTotal Outflow kcfsGeneration Flow kcfsSpill kcfsMidnight Reservoir ElevationAverage Forebay ElevationAverage Tailwater ElevationAverage Head feetProject Average Tailwater2nd Powerhouse Total MWh2nd Powerhouse Flow kcfs
1 14694 612 96 136.10 138.10 130.20 0.50 75.60 75.30 11.60 63.70 11.60 12444 110.90
2 15209 634 96 135.40 140.40 135.90 0.60 74.60 74.80 12.20 62.60 12.20 11093 100.10
3 14648 610 96 128.70 135.70 131.20 0.50 74.30 74.30 11.90 62.40 12.00 10230 92.70
4 14712 613 96 138.10 136.10 131.70 0.60 74.60 74.30 12.00 62.30 12.00 10474 95.10
5 14662 611 96 141.30 136.30 131.90 0.50 75.00 74.40 11.90 62.50 12.00 10640 97.00
6 14880 620 96 137.30 138.30 133.80 0.50 75.00 74.50 11.90 62.60 12.00 10748 97.80
7 13753 573 96 126.10 128.10 123.70 0.50 74.70 74.30 11.50 62.80 11.60 10835 98.30
8 13332 556 96 118.50 124.50 120.10 0.50 74.20 74.20 11.40 62.80 11.50 11187 101.40
9 130.30 126.30 122.10 0.30 74.50 73.80 11.50 62.30 11.50 87.30
10 132.20 127.20 123.30 0.00 75.10 74.10 11.50 62.60 11.50 88.30
11 126.00 125.00 121.10 0.00 75.10 74.50 11.40 63.10 11.50 93.00
12 118.00 118.00 113.50 0.50 75.10 74.40 11.40 63.00 11.60 104.40
13 121.90 116.90 112.50 0.50 75.60 74.90 11.40 63.50 11.50 106.50
14 117.90 118.90 114.50 0.50 75.60 75.00 11.50 63.50 11.50 107.20
15 121.00 120.00 115.50 0.50 75.70 75.20 11.40 63.80 11.50 107.50
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TOT115890  768           
AVG 14486 604 96 128.59 128.65 124.07 0.43 74.98 74.53 11.63 62.90 11.70 10956 99.17
MAX 15209   141.30 140.40 135.90 0.60 75.70 75.30 12.20 63.80 12.20 12444 110.90
MIN 13332   117.90 116.90 112.50 0.00 74.20 73.80 11.40 62.30 11.50 10230 87.30