US Army Corps of Engineers

Lower Granite Dam & Lake

May 2024

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 2080 87 35 79.60 78.40 11.90 66.00 733.81 733.62 633.72 99.90 734.32
2 2082 87 35 76.00 77.00 11.90 64.40 733.57 733.67 633.74 99.93 734.21
3 2078 87 34 73.40 74.10 11.90 61.50 733.30 733.40 633.50 99.90 733.92
4 2086 87 34 70.50 70.40 11.90 58.10 733.35 733.32 633.22 100.10 733.88
5 2082 87 35 69.90 69.10 11.90 56.70 733.59 733.51 633.49 100.02 734.06
6 2078 87 35 72.70 72.50 11.90 60.00 733.64 733.67 633.69 99.98 734.27
7 2079 87 35 76.20 75.90 11.90 63.50 733.70 733.69 633.91 99.78 734.38
8 2078 87 35 75.80 75.00 11.90 62.60 733.89 733.80 633.65 100.15 734.41
9 2089 87 35 73.40 73.50 11.90 61.20 733.88 733.86 633.58 100.28 734.40
10 2084 87 35 70.80 71.80 11.90 59.40 733.61 733.75 633.51 100.24 734.23
11 2084 87 36 71.60 70.40 11.90 58.00 733.88 733.58 633.46 100.12 734.17
12 2090 87 36 77.80 79.00 11.90 66.60 733.59 733.94 633.73 100.21 734.46
13 89.20 88.90 13.10 75.40 733.68 733.53 633.91 99.62 734.39
14 100.40 100.10 17.70 81.90 733.77 733.63 634.12 99.51 734.52
15 108.60 107.70 24.90 82.30 733.96 733.87 634.58 99.29 734.78
16 110.30 111.50 29.50 81.40 733.65 733.71 634.54 99.17 734.76
17 111.80 111.80 30.90 80.40 733.68 733.81 634.67 99.14 734.90
18 110.70 111.80 31.30 80.10 733.44 733.64 634.81 98.83 734.79
19 100.50 100.60 20.20 80.00 733.36 733.62 634.55 99.07 734.58
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TOT 24990  421         
AVG 2082 87 35 85.22 85.24 16.34 68.39 733.65 733.66 633.91 99.75 734.39
MAX 2090   111.80 111.80 31.30 82.30 733.96 733.94 634.81 100.28 734.90
MIN 2078   69.90 69.10 11.90 56.70 733.30 733.32 633.22 98.83 733.88