US Army Corps of Engineers

Lower Granite Dam & Lake

January 2021

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 3860 161 16 24.00 21.70 21.60 0.00 736.83 736.76 636.64 100.12 736.98
2 4689 195 16 24.40 26.60 26.50 0.00 736.27 736.82 636.61 100.21 736.13
3 4087 170 16 24.30 23.20 23.00 0.00 736.51 737.02 636.79 100.23 736.68
4 4959 207 16 27.00 28.40 28.10 0.00 736.19 736.75 637.08 99.67 736.35
5 5018 209 17 28.80 28.80 28.70 0.00 736.19 736.49 636.87 99.62 736.03
6 5163 215 23 27.70 29.80 29.50 0.00 735.68 736.44 636.90 99.54 735.82
7 4548 190 22 28.70 25.60 25.60 0.00 736.44 736.72 636.48 100.24 736.32
8 4445 185 21 25.20 24.90 24.80 0.00 736.51 736.98 636.38 100.60 736.73
9 4804 200 22 25.40 27.00 27.00 0.00 736.11 736.54 636.52 100.02 736.21
10 4265 178 22 25.40 24.20 24.20 0.00 736.41 736.55 636.78 99.77 736.44
11 4406 184 20 24.50 25.00 24.80 0.00 736.29 736.66 636.75 99.91 736.28
12 4722 197 19 25.20 26.50 26.50 0.00 735.95 736.30 636.62 99.68 735.64
13 5450 227 19 30.80 30.80 30.70 0.00 735.95 736.66 636.64 100.02 736.20
14 5840 243 17 34.90 32.90 32.90 0.00 736.45 736.54 636.07 100.47 736.57
15 5828 243 16 30.80 32.80 32.70 0.00 735.96 736.54 636.11 100.43 735.98
16 5566 232 16 29.40 31.30 31.30 0.00 735.49 736.17 636.13 100.04 735.56
17 4202 175 16 27.50 23.80 23.80 0.00 736.38 736.41 636.32 100.09 736.60
18 4690 195 16 25.30 26.80 26.70 0.00 736.02 736.39 636.66 99.73 735.86
19 28.00 28.30 28.20 0.00 735.95 736.46 636.67 99.79 735.97
20 26.30 24.90 24.60 0.00 736.29 736.54 636.72 99.82 736.33
21 26.70 25.80 25.70 0.00 736.52 736.74 636.72 100.02 736.61
22 26.70 27.00 26.80 0.00 736.43 736.70 636.78 99.92 736.62
23 25.60 25.30 25.20 0.00 736.50 736.71 636.93 99.78 736.60
24 27.10 28.20 28.10 0.00 736.23 736.69 636.77 99.92 736.27
25 29.80 29.80 29.60 0.00 736.22 736.48 636.47 100.01 736.16
26
27
28
29
30
31
TOT 86544  331         
AVG 4808 200 18 27.18 27.18 27.06 0.00 736.23 736.60 636.62 99.99 736.28
MAX 5840   34.90 32.90 32.90 0.00 736.83 737.02 637.08 100.60 736.98
MIN 3860   24.00 21.70 21.60 0.00 735.49 736.17 636.07 99.54 735.56