US Army Corps of Engineers

Bonneville Dam & Lake on Columbia River

May 2022

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 3278 137 96 169.20 172.20 31.40 128.40 74.40 74.60 15.10 59.50 15.20 3210 30.50
2 3285 137 96 157.70 161.70 31.40 117.80 74.10 74.10 14.60 59.50 14.70 3218 30.50
3 3321 138 96 171.70 160.70 31.50 116.80 75.30 74.50 14.40 60.10 14.40 3254 30.60
4 3317 138 96 169.30 170.30 31.50 126.40 75.10 75.00 14.90 60.10 15.00 3250 30.60
5 3614 151 96 179.00 182.00 34.80 134.90 74.80 74.80 15.60 59.20 15.70 3547 33.90
6 5391 225 96 217.10 214.10 53.40 148.20 75.20 75.00 17.70 57.30 17.70 5324 52.50
7 7063 294 96 225.60 232.60 72.00 148.30 74.40 75.00 19.10 55.90 19.10 7012 71.30
8 8726 364 96 248.30 253.30 92.90 148.00 74.00 74.10 20.60 53.50 20.50 8456 89.90
9 8173 341 96 247.70 247.70 87.30 148.00 73.90 73.80 20.40 53.40 20.40 7889 84.10
10 6763 282 96 232.00 232.00 71.60 148.10 73.90 73.40 19.50 53.90 19.50 6675 70.40
11 8730 364 96 255.80 253.80 93.20 148.20 74.10 73.80 20.30 53.50 20.20 7438 79.30
12 8593 358 96 250.60 251.60 90.90 148.40 74.00 74.20 20.30 53.90 20.30 7697 81.30
13 8545 356 96 249.70 251.70 91.00 148.30 74.10 73.70 20.20 53.50 20.20 7722 82.20
14 9311 388 96 272.20 259.20 98.30 148.50 75.10 74.50 20.70 53.80 20.60 8144 86.20
15 9182 383 96 259.30 257.30 96.10 148.80 75.30 75.10 20.90 54.20 20.80 8000 83.80
16 8362 348 96 245.90 247.90 86.50 148.90 75.10 75.10 20.60 54.50 20.50 7111 73.80
17 9562 398 96 257.20 262.20 100.90 148.90 74.50 74.40 21.20 53.20 21.00 6907 73.40
18 10662 444 96 268.60 276.60 115.10 149.10 73.80 73.90 22.00 51.90 21.70 6406 69.90
19 10332 430 96 266.60 275.60 114.20 149.00 72.90 73.00 21.90 51.10 21.60 7314 81.40
20 11978 499 96 307.20 297.20 135.70 149.00 73.80 72.60 22.70 49.90 22.30 7444 85.10
21 295.70 290.70 128.90 149.40 74.20 74.30 22.30 52.00 22.00 83.60
22 274.30 284.30 122.20 149.80 73.20 73.70 22.00 51.70 21.70 82.60
23 274.60 260.60 98.50 149.70 74.80 74.40 20.80 53.60 20.60 74.80
24 257.60 256.60 94.10 150.10 74.90 74.90 20.20 54.70 20.20 70.50
25 274.00 280.00 117.80 149.90 74.30 73.90 21.40 52.50 21.20 73.30
26 280.30 285.30 123.40 149.50 73.70 73.90 21.80 52.10 21.60 81.70
27 296.10 298.10 136.50 149.20 73.50 73.10 22.60 50.50 22.20 82.80
28
29
30
31
TOT148188  1920           
AVG 7409 309 96 244.57 245.01 88.19 144.43 74.31 74.18 19.77 54.41 19.66 6301 69.26
MAX 11978   307.20 298.10 136.50 150.10 75.30 75.10 22.70 60.10 22.30 8456 89.90
MIN 3278   157.70 160.70 31.40 116.80 72.90 72.60 14.40 49.90 14.40 3210 30.50