US Army Corps of Engineers

Lower Granite Dam & Lake

January 2023

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 3968 165 45 25.30 23.40 23.00 0.00 736.93 736.91 638.30 98.61 737.16
2 4807 200 45 25.00 27.60 27.20 0.00 736.30 736.97 636.76 100.21 736.59
3 3848 160 23 23.60 22.00 21.70 0.00 736.70 736.51 635.43 101.08 736.73
4 4189 175 17 22.90 23.40 23.20 0.00 736.59 736.91 635.71 101.20 736.52
5 3584 149 20 21.40 20.60 20.50 0.00 736.79 736.85 636.57 100.28 736.90
6 3825 159 20 22.00 22.00 21.90 0.00 736.80 736.93 637.06 99.87 736.85
7 3798 158 19 21.90 21.60 21.60 0.00 736.89 737.09 637.51 99.58 736.93
8 4111 171 19 21.40 23.60 23.60 0.00 736.34 736.90 637.58 99.32 736.47
9 1323 55 19 24.30 21.90 12.50 9.40 736.93 736.56 636.85 99.71 737.07
10 20 1 20 26.00 24.20 7.40 16.80 737.38 737.21 636.22 100.99 737.54
11 20 1 20 26.60 27.20 7.40 19.60 737.20 737.29 636.17 101.12 737.36
12 19 1 19 26.20 27.00 7.30 19.70 737.01 737.11 635.94 101.17 737.11
13 18 1 18 27.40 26.90 7.20 19.70 737.13 737.11 636.55 100.56 737.26
14 18 1 18 28.90 27.90 7.20 20.70 737.37 737.33 636.61 100.72 737.50
15 19 1 18 28.30 30.50 7.30 23.20 736.83 737.05 636.35 100.70 737.06
16 19 1 19 29.60 27.60 7.30 20.10 737.31 737.10 635.82 101.28 737.49
17 20 1 20 30.10 31.00 7.40 23.40 737.07 737.28 635.91 101.37 737.23
18 20 1 20 30.50 31.50 7.50 23.90 736.85 736.95 636.55 100.40 737.05
19 1620 68 20 27.70 29.30 14.20 15.00 736.46 736.77 636.37 100.40 736.54
20 4193 175 19 24.20 23.90 23.80 0.00 736.55 736.47 636.45 100.02 736.53
21 3776 157 20 22.80 21.70 21.70 0.00 736.84 736.85 636.59 100.26 736.99
22 20.80 21.60 21.60 0.00 736.66 736.95 636.51 100.44 736.80
23 20.10 19.90 19.80 0.00 736.71 736.69 635.66 101.03 736.92
24 22.20 23.20 23.20 0.00 736.47 736.88 635.88 101.00 736.71
25 22.60 22.20 22.10 0.00 736.56 736.70 635.60 101.10 736.60
26 23.20 22.90 22.90 0.00 736.63 736.72 635.45 101.27 736.73
27 21.00 21.90 21.90 0.00 736.40 736.80 635.46 101.34 736.59
28
29
30
31
TOT 43215  457         
AVG 2058 86 22 24.67 24.69 16.76 7.83 736.80 736.92 636.37 100.56 736.93
MAX 4807   30.50 31.50 27.20 23.90 737.38 737.33 638.30 101.37 737.54
MIN 18   20.10 19.90 7.20 0.00 736.30 736.47 635.43 98.61 736.47
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