US Army Corps of Engineers

Lower Granite Dam & Lake

February 2020

Day of MonthTotal Generation MWhAverage Generation MWStation Use MWhInflow kcfsTotal Outflow kcfsGeneration Flow kcfsSpill kcfsMidnight Reservoir ElevationAverage Forebay ElevationAverage Tailwater ElevationAverage Head feetMidnight Lewiston Gage ft
1 5584 233 16 34.20 32.50 32.40 0.00 736.42 736.71 636.69 100.02 736.57
2 6215 259 17 36.20 34.90 34.80 0.00 736.74 737.13 636.72 100.41 736.82
3 6188 258 18 34.70 34.80 34.80 0.00 736.72 736.60 636.80 99.80 736.82
4 6693 279 19 35.00 38.20 37.90 0.00 735.93 736.73 636.69 100.04 735.87
5 5021 209 19 31.70 28.80 28.70 0.00 736.67 736.54 636.28 100.26 736.83
6 6150 256 20 31.90 35.70 35.60 0.00 735.74 736.17 636.49 99.68 735.87
7 10265 428 20 58.70 58.80 58.70 0.00 735.72 736.17 637.04 99.13 736.16
8 12116 505 19 68.90 69.80 69.80 0.00 735.50 735.64 637.68 97.96 735.91
9 8869 370 19 51.70 50.00 50.00 0.00 735.91 735.93 636.79 99.14 736.10
10 7756 323 19 44.00 43.70 43.70 0.00 736.00 736.26 636.96 99.30 736.20
11 41.90 40.80 40.70 0.00 736.25 736.41 637.21 99.20 736.51
12 38.20 37.70 37.60 0.00 736.37 736.30 636.87 99.43 736.60
13 38.80 39.10 39.00 0.00 736.31 736.37 635.62 100.75 736.39
14 36.60 37.40 37.20 0.00 736.12 736.43 635.00 101.43 736.36
15 36.90 37.30 37.20 0.00 736.04 736.11 634.33 101.78 736.14
16 35.50 33.00 32.80 0.00 736.66 736.81 634.19 102.62 736.82
17 30.00 34.10 34.00 0.00 735.64 736.22 634.20 102.02 735.84
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TOT 74859  186         
AVG 7486 312 19 40.29 40.39 40.29 0.00 736.16 736.38 636.21 100.17 736.34
MAX 12116   68.90 69.80 69.80 0.00 736.74 737.13 637.68 102.62 736.83
MIN 5021   30.00 28.80 28.70 0.00 735.50 735.64 634.19 97.96 735.84