US Army Corps of Engineers

Lower Granite Dam & Lake

October 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 2920 122 36 21.60 19.00 17.10 1.20 736.67 736.47 635.76 100.71 736.74
2 3998 167 36 22.50 23.80 23.30 0.00 736.34 736.85 635.95 100.90 736.42
3 3484 145 36 21.00 21.10 20.50 0.00 736.34 736.60 636.47 100.13 736.55
4 2917 122 36 20.80 18.90 17.20 1.20 736.81 736.74 636.72 100.02 737.05
5 3613 151 35 20.90 21.80 21.30 0.00 736.59 737.04 637.26 99.78 736.77
6 3232 135 34 20.40 20.80 19.20 1.20 736.49 736.78 637.18 99.60 736.73
7 3438 143 34 20.90 20.80 20.30 0.00 736.50 736.92 637.20 99.72 736.69
8 3089 129 33 19.80 20.00 18.30 1.20 736.46 736.74 636.87 99.87 736.63
9 3199 133 33 20.00 19.50 18.90 0.00 736.61 736.72 636.85 99.87 736.74
10 3071 128 33 18.80 18.60 18.20 0.00 736.66 736.77 636.82 99.95 736.96
11 2818 117 34 18.90 18.30 16.60 1.20 736.82 736.84 636.73 100.11 737.00
12 3192 133 33 20.00 19.50 18.90 0.00 736.94 737.02 637.12 99.90 737.13
13 3065 128 34 19.50 19.80 18.10 1.20 736.84 737.14 637.09 100.05 737.22
14 3426 143 33 0.00 736.94
15 4430 185 33 24.70 27.80 26.20 1.20 736.32 736.80 637.20 99.60 736.40
16 3468 145 33 21.20 21.20 20.70 0.00 736.30 736.56 637.50 99.06 736.58
17 2899 121 33 19.50 17.70 17.30 0.00 736.75 736.61 637.50 99.11 737.05
18 3453 144 34 20.70 22.10 20.50 1.20 736.40 736.67 637.50 99.17 736.45
19 21.70 21.20 20.80 0.00 736.52 736.73 637.34 99.39 736.87
20 24.70 23.60 21.90 1.20 736.81 736.90 636.94 99.96 737.06
21 24.80 26.10 25.60 0.00 736.45 736.88 636.94 99.94 736.69
22 22.30 23.90 22.40 1.20 736.05 736.43 636.92 99.51 736.26
23 22.10 20.60 20.10 0.00 736.43 736.35 636.83 99.52 736.64
24 21.30 20.70 20.30 0.00 736.61 736.53 636.85 99.68 736.76
25 20.20 19.30 17.70 1.20 736.82 736.91 636.75 100.16 737.03
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1
TOT 59711  615         
AVG 3317 138 34 21.18 21.09 20.06 0.53 736.56 736.76 636.93 99.82 736.77
MAX 4430   24.80 27.80 26.20 1.20 736.94 737.14 637.50 100.90 737.22
MIN 2818   18.80 17.70 16.60 0.00 736.05 736.35 635.76 99.06 736.26