US Army Corps of Engineers

Lower Granite Dam & Lake

December 2019

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 2827 118 38 17.20 16.90 16.50 0.00 736.16 736.30 634.13 102.17 736.20
2 3196 133 38 18.20 18.90 18.40 0.00 736.00 736.08 634.83 101.25 736.07
3 2923 122 37 19.50 17.30 16.80 0.00 736.53 736.40 634.12 102.28 736.62
4 3377 141 37 19.90 19.90 19.40 0.00 736.55 736.65 634.03 102.62 736.57
5 3519 147 37 20.80 20.40 20.00 0.00 736.65 736.69 634.17 102.52 736.65
6 3776 157 37 21.20 22.10 21.70 0.00 736.44 736.46 634.63 101.83 736.33
7 3365 140 36 18.60 19.70 19.30 0.00 736.18 736.64 634.92 101.72 736.17
8 2958 123 37 17.80 17.50 17.10 0.00 736.26 736.44 635.59 100.85 736.19
9 20.60 19.20 18.70 0.00 736.61 736.63 636.16 100.47 736.45
10 21.60 22.20 21.80 0.00 736.46 736.80 636.22 100.58 736.28
11 19.60 20.40 20.00 0.00 736.26 736.65 636.23 100.42 736.20
12 18.70 18.80 18.30 0.00 736.23 736.60 636.14 100.46 736.12
13 19.40 20.60 20.10 0.00 735.95 736.32 636.40 99.92 735.82
14 22.70 22.10 21.70 0.00 736.11 736.57 636.19 100.38 735.96
15 22.40 21.20 20.70 0.00 736.39 736.58 635.98 100.60 736.29
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TOT 25942  297         
AVG 3243 135 37 19.88 19.81 19.37 0.00 736.32 736.52 635.32 101.20 736.26
MAX 3776   22.70 22.20 21.80 0.00 736.65 736.80 636.40 102.62 736.65
MIN 2827   17.20 16.90 16.50 0.00 735.95 736.08 634.03 99.92 735.82