US Army Corps of Engineers

Bonneville Dam & Lake on Columbia River

October 2020

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 9993 416 96 101.10 97.10 88.50 1.30 74.10 73.50 9.40 64.10 9.50 10993 87.60
2 10387 433 96 112.60 99.60 90.90 1.30 75.30 74.30 9.30 65.00 9.30 10320 90.10
3 10339 431 96 101.10 98.10 89.40 1.30 75.60 75.20 9.30 65.90 9.30 10267 88.50
4 11720 488 96 109.00 111.00 102.30 1.30 75.50 75.40 10.10 65.30 10.20 11190 97.50
5 12491 520 96 118.00 118.00 109.40 1.20 75.50 75.40 10.50 64.90 10.70 11698 102.40
6 9977 416 96 97.80 93.80 85.30 1.20 75.70 75.40 8.90 66.50 8.90 9905 84.40
7 10410 434 96 98.40 97.40 88.70 1.20 76.00 75.70 8.90 66.80 8.80 10338 87.90
8 10604 442 96 97.20 99.20 90.60 1.20 75.80 75.80 9.10 66.70 9.00 10533 89.80
9 9949 415 96 92.00 93.00 84.40 1.20 75.60 75.70 8.60 67.10 8.50 9878 83.50
10 8907 371 96 81.50 83.50 74.90 1.20 75.50 75.60 8.20 67.40 8.10 8835 74.00
11 9151 381 96 87.80 85.80 77.20 1.20 75.70 75.60 8.20 67.40 8.10 9079 76.30
12 8369 349 96 80.00 79.00 70.40 1.20 75.80 75.70 8.20 67.50 8.10 8297 69.50
13 11139 464 96 97.80 105.80 97.10 1.20 75.00 75.30 9.80 65.50 9.90 11067 96.20
14 11914 496 96 100.20 116.20 107.60 1.20 73.40 74.00 11.00 63.00 11.10 11617 104.80
15 10994 458 96 101.50 110.50 101.90 1.20 72.50 72.50 10.30 62.20 10.40 10926 101.00
16 9938 414 96 109.90 99.90 91.40 1.20 73.50 72.50 9.60 62.90 9.60 9871 90.50
17 10547 439 96 99.70 103.70 95.10 1.20 73.10 73.00 10.10 62.90 10.10 10481 94.30
18 9458 394 96 100.10 93.10 84.50 1.20 73.70 73.20 9.40 63.80 9.50 9391 83.70
19 82.40 94.40 85.80 1.20 72.60 72.60 9.90 62.70 9.60 27.90
20 85.40 80.40 71.90 1.10 72.80 72.50 8.70 63.80 8.20 0.00
21 99.40 94.40 86.00 0.90 73.20 72.70 9.60 63.10 8.90 0.00
22 112.20 105.20 96.70 1.10 74.00 73.10 10.30 62.80 9.50 0.00
23 111.10 115.10 106.60 1.20 73.50 73.40 11.10 62.30 10.10 0.00
24 116.50 115.50 107.00 1.20 73.70 73.30 11.10 62.20 10.20 0.00
25 128.30 115.30 106.80 1.10 75.00 73.90 10.80 63.10 9.70 0.00
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1
TOT186287  1728           
AVG 10349 431 96 100.84 100.20 91.62 1.19 74.48 74.21 9.62 64.60 9.41 10260 65.20
MAX 12491   128.30 118.00 109.40 1.30 76.00 75.80 11.10 67.50 11.10 11698 104.80
MIN 8369   80.00 79.00 70.40 0.90 72.50 72.50 8.20 62.20 8.10 8297 0.00