US Army Corps of Engineers

Lower Granite Dam & Lake

December 2023

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 3466 144 40 17.20 20.40 20.00 0.00 734.20 734.61 636.63 97.98 734.35
2 17.80 19.80 19.30 0.00 733.70 734.29 636.28 98.01 734.19
3 18.20 19.30 18.80 0.00 733.42 733.82 635.40 98.42 733.75
4 20.60 16.40 12.40 3.50 734.45 733.98 633.45 100.53 734.39
5 22.70 20.00 16.90 2.70 735.11 735.07 634.16 100.91 735.45
6 25.20 20.40 18.20 1.60 736.29 736.04 635.50 100.54 736.60
7 26.30 22.30 19.80 1.90 737.30 736.92 637.01 99.91 737.81
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TOT 3466  40         
AVG 3466 144 40 21.14 19.80 17.91 1.39 734.92 734.96 635.49 99.47 735.22
MAX 3466   26.30 22.30 20.00 3.50 737.30 736.92 637.01 100.91 737.81
MIN 3466   17.20 16.40 12.40 0.00 733.42 733.82 633.45 97.98 733.75