US Army Corps of Engineers

Lower Granite Dam & Lake

September 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 4060 169 42 25.30 24.20 23.70 0.00 736.35 736.50 635.46 101.04 736.49
2 4298 179 42 25.60 25.60 25.20 0.00 736.34 736.54 635.76 100.78 736.60
3 4116 171 42 26.10 24.70 24.00 0.00 736.68 736.96 636.20 100.76 736.92
4 4980 207 41 26.10 29.70 29.20 0.00 735.76 736.53 636.22 100.31 735.93
5 4174 174 41 26.10 25.00 24.50 0.00 736.04 736.11 636.18 99.93 736.25
6 4531 189 41 27.20 27.40 26.70 0.00 735.99 736.35 636.38 99.97 736.17
7 3581 149 41 24.60 21.70 21.20 0.00 736.71 736.60 636.51 100.09 736.76
8 4145 173 41 23.40 24.80 24.30 0.00 736.36 736.79 636.67 100.12 736.53
9 4048 169 41 23.40 24.60 23.90 0.00 736.06 736.40 636.63 99.77 736.16
10 4052 169 42 25.30 24.40 23.90 0.00 736.31 736.49 636.90 99.59 736.42
11 4213 176 42 25.80 25.40 24.90 0.00 736.42 736.80 637.02 99.78 736.61
12 3983 166 41 24.30 24.10 23.60 0.00 736.45 736.77 637.16 99.61 736.72
13 4183 174 41 24.60 25.10 24.70 0.00 736.33 736.55 636.97 99.58 736.46
14 3892 162 42 23.80 23.30 22.90 0.00 736.45 736.72 636.70 100.02 736.71
15 22.90 20.40 20.00 0.00 737.07 737.01 636.98 100.03 737.31
16 23.70 23.90 22.90 0.60 737.03 737.33 637.14 100.19 737.21
17 23.40 23.90 23.40 0.00 736.90 737.22 637.08 100.14 737.17
18 24.10 24.40 24.00 0.00 736.81 737.25 637.04 100.21 737.14
19 23.00 22.70 22.10 0.00 736.89 737.04 637.18 99.86 737.01
20 22.00 21.10 20.70 0.00 737.11 737.18 636.72 100.46 737.35
21 21.60 22.60 22.10 0.00 736.85 737.20 636.19 101.01 737.10
22
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29
30
TOT 58257  582         
AVG 4161 173 42 24.40 24.24 23.71 0.03 736.52 736.78 636.62 100.15 736.72
MAX 4980   27.20 29.70 29.20 0.60 737.11 737.33 637.18 101.04 737.35
MIN 3581   21.60 20.40 20.00 0.00 735.76 736.11 635.46 99.58 735.93