US Army Corps of Engineers

John Day & Lake Umatilla

September 2020

Day of MonthTotal Generation MWhAverage Generation MWStation Use MWhInflow kcfsTotal Outflow kcfsGeneration Flow kcfsSpill kcfsMidnight Reservoir ElevationAverage Forebay ElevationAverage Tailwater ElevationAverage Head feet
1 18198 758 41 106.30 101.30 98.50 1.50 264.01 263.89 159.75 104.14
2 21081 878 42 109.40 116.90 114.60 1.00 263.71 263.81 160.08 103.73
3 18531 772 40 104.90 102.40 100.40 0.90 263.81 263.82 159.70 104.12
4 17512 730 40 87.00 97.00 94.80 0.90 263.42 263.76 159.65 104.11
5 15532 647 40 93.40 86.00 83.90 1.00 263.71 263.55 159.55 104.00
6 20146 839 40 110.80 110.80 108.80 1.00 263.71 263.80 159.65 104.15
7 18315 763 39 98.80 101.30 99.30 1.00 263.45 263.69 159.54 104.15
8 20052 835 40 108.60 110.90 109.00 1.00 263.52 263.53 159.82 103.71
9 16818 701 41 88.70 93.70 91.50 0.90 263.41 263.46 159.75 103.71
10 19620 817 41 109.20 109.20 106.90 1.10 263.41 263.20 159.77 103.43
11 17565 732 40 102.70 97.70 95.80 0.90 263.51 263.29 159.75 103.54
12 17969 749 41 111.90 99.50 97.60 1.00 264.01 263.74 159.95 103.79
13 20346 848 41 114.90 112.20 110.30 1.10 264.11 264.00 160.08 103.92
14 19208 800 41 100.20 105.30 103.60 1.00 263.91 263.90 159.54 104.36
15 95.30 100.20 98.50 0.90 263.71 263.73 159.85 103.88
16 91.90 89.40 87.40 0.90 263.81 263.68 159.69 103.99
17 107.10 102.10 100.10 0.90 263.98 263.83 159.87 103.96
18 115.40 115.30 113.40 0.90 264.01 263.95 160.10 103.85
19 86.90 87.00 85.10 0.90 264.01 263.90 159.76 104.14
20 82.70 80.10 78.00 0.90 264.11 264.08 159.61 104.47
21 71.00 78.60 76.70 0.90 263.81 263.90 159.72 104.18
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TOT260894  568        
AVG 18635 776 41 99.86 99.85 97.82 0.98 263.77 263.74 159.77 103.97
MAX 21081   115.40 116.90 114.60 1.50 264.11 264.08 160.10 104.47
MIN 15532   71.00 78.60 76.70 0.90 263.41 263.20 159.54 103.43