US Army Corps of Engineers

Bonneville Dam & Lake on Columbia River

January 2021

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 17431 726 96 159.10 168.10 162.60 0.50 74.30 74.60 15.30 59.30 15.20 9081 86.30
2 15280 637 96 152.00 145.00 139.50 0.50 74.80 74.70 14.40 60.30 14.30 7871 73.40
3 13887 579 96 134.60 129.60 124.10 0.50 75.20 75.30 13.80 61.50 13.80 6223 56.90
4 15838 660 96 149.50 150.50 145.00 0.50 75.30 75.10 14.90 60.20 14.80 7693 72.20
5 18461 769 96 174.30 184.30 177.80 0.50 74.30 74.60 17.10 57.50 16.80 9389 91.70
6 18151 756 96 184.20 184.20 178.10 0.50 74.20 73.80 17.20 56.60 16.90 9118 90.80
7 18383 766 96 188.00 184.00 178.50 0.50 74.80 74.20 17.00 57.20 16.80 9166 90.30
8 17902 746 96 180.40 177.40 171.90 0.50 75.00 74.40 16.60 57.80 16.40 9135 89.20
9 18646 777 96 185.10 185.10 179.60 0.50 75.10 74.60 16.60 58.00 16.50 9529 92.90
10 17453 727 96 169.50 170.50 165.00 0.50 75.00 74.50 15.80 58.70 15.70 9033 86.90
11 17951 748 96 178.90 175.90 170.40 0.50 75.20 74.40 16.00 58.40 15.80 9190 88.60
12 19883 828 96 202.10 204.10 198.60 0.50 74.80 74.30 17.90 56.40 17.70 10438 105.20
13 20842 868 96 231.60 227.60 216.50 6.10 75.30 75.40 20.60 54.80 20.30 11170 116.90
14 21255 886 96 230.00 247.00 236.10 5.10 73.60 73.30 21.70 51.60 21.40 11690 130.20
15 19249 802 96 201.20 213.20 207.20 1.00 72.40 72.50 20.00 52.50 19.70 9846 106.30
16 17363 723 96 197.70 180.70 175.20 0.50 74.10 72.80 17.80 55.00 17.60 8795 90.10
17 17114 713 96 169.20 173.20 167.70 0.50 73.80 73.30 16.70 56.60 16.50 8729 87.20
18 17221 718 96 171.40 171.40 165.90 0.50 73.90 73.50 15.90 57.60 15.70 8805 86.40
19 183.00 185.00 179.50 0.50 73.60 73.40 16.40 57.00 16.10 92.30
20 184.40 178.40 172.80 0.50 74.20 73.50 16.10 57.40 15.80 83.00
21 169.80 169.80 164.30 0.50 74.20 73.80 15.20 58.60 15.00 86.30
22 168.50 169.50 163.90 0.50 74.30 73.50 15.00 58.50 14.90 87.10
23 171.00 173.00 167.40 0.50 73.90 74.00 15.30 58.70 15.00 86.20
24 180.40 184.40 178.80 0.50 73.40 73.40 16.00 57.40 15.80 91.10
25 184.60 182.60 177.10 0.50 73.70 73.40 16.00 57.40 15.80 91.00
26
27
28
29
30
31
TOT322310  1728           
AVG 17906 746 96 180.02 180.58 174.54 0.93 74.34 74.01 16.61 57.40 16.41 9161 90.34
MAX 21255   231.60 247.00 236.10 6.10 75.30 75.40 21.70 61.50 21.40 11690 130.20
MIN 13887   134.60 129.60 124.10 0.50 72.40 72.50 13.80 51.60 13.80 6223 56.90