US Army Corps of Engineers

Lower Granite Dam & Lake

May 2022

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 2457 102 44 43.20 42.80 13.70 28.70 736.66 736.68 634.12 102.56 736.87
2 2854 119 45 43.80 44.90 15.90 28.50 736.40 736.53 634.11 102.42 736.64
3 2918 122 45 46.80 46.70 16.30 29.80 736.42 736.34 634.08 102.26 736.67
4 3124 130 45 50.60 50.10 17.40 32.30 736.53 736.49 634.07 102.42 736.80
5 3260 136 45 53.80 55.90 18.20 37.20 736.03 736.43 634.13 102.30 736.38
6 3621 151 44 65.80 65.60 20.50 44.60 736.08 735.94 634.39 101.55 736.41
7 8756 365 43 105.30 107.60 50.30 56.80 735.51 736.12 636.02 100.10 736.33
8 9927 414 43 117.40 118.00 57.50 60.00 735.38 735.83 636.02 99.81 736.25
9 6521 272 44 101.10 98.90 37.50 61.00 735.94 735.84 635.34 100.50 736.52
10 5107 213 44 86.50 85.50 29.00 56.20 736.19 736.11 634.76 101.35 736.02
11 4611 192 44 75.50 76.60 26.20 49.90 735.91 736.04 634.74 101.30 735.69
12 4194 175 45 68.80 68.40 23.70 44.30 735.99 735.95 634.51 101.44 735.71
13 4215 176 45 68.20 67.90 23.90 43.60 736.04 735.86 634.62 101.24 735.80
14 4108 171 45 66.50 66.50 23.20 42.90 736.05 736.00 634.46 101.54 735.77
15 4126 172 44 67.80 67.20 23.20 43.60 736.18 736.08 634.38 101.70 735.91
16 4224 176 44 72.60 74.50 23.90 50.00 735.72 735.92 634.78 101.14 735.67
17 5877 245 44 91.50 94.70 33.80 60.30 734.93 735.25 635.46 99.79 735.10
18 7032 293 44 104.70 106.00 40.70 64.90 734.62 735.00 635.66 99.34 735.06
19 7332 305 44 108.80 108.00 42.40 65.20 734.81 734.81 635.66 99.15 735.04
20 6522 272 44 103.30 104.30 38.00 65.80 734.56 734.76 635.42 99.34 734.72
21 94.10 92.40 32.10 59.90 734.99 734.65 634.94 99.71 734.74
22 90.30 91.30 31.10 59.60 734.74 735.04 634.95 100.09 734.82
23 83.20 82.70 29.20 53.00 734.88 734.66 634.95 99.71 734.64
24 79.50 79.60 27.80 51.30 734.87 734.76 634.91 99.85 734.67
25 79.90 79.70 28.60 50.60 734.92 734.76 634.78 99.98 735.40
26 85.60 85.60 29.60 55.30 734.91 734.94 634.70 100.24 735.50
27 105.10 105.40 40.10 64.90 734.83 735.13 635.35 99.78 735.79
28
29
30
31
TOT100786  886         
AVG 5039 210 44 79.99 80.25 29.40 50.38 735.56 735.63 634.86 100.76 735.74
MAX 9927   117.40 118.00 57.50 65.80 736.66 736.68 636.02 102.56 736.87
MIN 2457   43.20 42.80 13.70 28.50 734.56 734.65 634.07 99.15 734.64