US Army Corps of Engineers

Bonneville Dam & Lake on Columbia River

January 2023

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 12467 519 96 113.60 113.60 108.00 0.60 75.70 75.50 12.70 62.80 12.30 2630 22.80
2 13811 575 96 122.40 126.40 120.80 0.60 75.30 74.90 12.60 62.30 12.20 3857 33.70
3 14590 608 96 138.20 133.20 127.60 0.60 76.00 75.30 13.20 62.10 12.80 4890 43.00
4 14616 609 96 124.20 133.20 127.60 0.60 75.10 75.40 12.70 62.70 12.40 6054 52.90
5 13624 568 96 117.10 126.10 120.50 0.60 74.20 74.20 12.50 61.70 12.20 5009 44.30
6 13313 555 96 135.00 123.00 117.50 0.50 75.30 74.40 12.50 61.90 12.20 4020 35.40
7 13239 552 96 116.80 121.80 116.20 0.50 74.80 74.60 12.50 62.10 12.10 4150 36.40
8 12922 538 96 119.50 119.50 114.00 0.50 74.90 74.40 12.50 61.90 12.20 3740 33.00
9 14916 622 96 133.40 140.40 134.80 0.60 73.70 74.40 13.60 60.80 13.30 5837 52.90
10 14033 585 96 140.80 131.80 126.20 0.60 74.60 74.00 13.20 60.80 13.00 5215 46.90
11 15063 628 96 146.30 141.30 135.70 0.60 75.10 74.30 13.60 60.70 13.30 5821 52.20
12 14649 610 96 140.50 134.50 128.90 0.60 75.70 75.10 12.90 62.20 12.60 6026 53.00
13 14055 586 96 127.70 128.70 123.10 0.60 75.60 75.20 12.80 62.40 12.60 5674 49.70
14 13869 578 96 124.80 126.80 121.10 0.60 75.30 75.10 12.60 62.50 12.30 4823 42.10
15 14552 606 96 130.70 134.70 129.20 0.60 75.00 74.90 13.30 61.60 12.90 5075 44.90
16 14520 605 96 139.60 134.60 129.10 0.50 75.20 74.90 13.30 61.60 13.10 5241 46.50
17 13521 563 96 119.40 124.40 118.80 0.60 74.90 74.80 12.60 62.20 12.30 4894 43.00
18 14928 622 96 138.40 140.40 134.90 0.60 74.80 74.20 13.60 60.60 13.30 5928 53.50
19 14452 602 96 137.60 135.60 130.00 0.60 75.10 74.20 13.40 60.80 13.20 5943 53.50
20 15692 654 96 144.40 147.40 141.80 0.60 74.70 74.50 13.90 60.60 13.60 7091 64.20
21 133.40 136.40 130.80 0.60 74.40 74.10 13.40 60.70 13.10 47.30
22 129.60 125.60 119.90 0.70 74.70 74.30 12.80 61.50 12.50 40.50
23 143.60 139.60 134.00 0.60 75.10 74.50 13.40 61.10 13.00 50.50
24 125.50 128.50 122.80 0.60 74.80 74.40 12.60 61.80 12.30 45.80
25 131.50 130.50 124.90 0.60 75.00 74.30 12.50 61.80 12.20 44.20
26 124.00 131.00 125.40 0.60 74.20 73.90 12.50 61.40 12.10 42.20
27 123.80 131.80 126.20 0.60 73.30 73.20 12.60 60.60 12.10 36.30
28
29
30
31
TOT282832  1920           
AVG 14142 589 96 130.44 131.14 125.55 0.59 74.91 74.56 12.96 61.60 12.64 5096 44.84
MAX 15692   146.30 147.40 141.80 0.70 76.00 75.50 13.90 62.80 13.60 7091 64.20
MIN 12467   113.60 113.60 108.00 0.50 73.30 73.20 12.50 60.60 12.10 2630 22.80