US Army Corps of Engineers

John Day & Lake Umatilla

September 2023

Day of MonthTotal Generation MWhAverage Generation MWStation Use MWhInflow kcfsTotal Outflow kcfsGeneration Flow kcfsSpill kcfsMidnight Reservoir ElevationAverage Forebay ElevationAverage Tailwater ElevationAverage Head feet
1 17748 740 43 123.50 97.50 95.50 1.00 264.93 264.30 160.28 104.02
2 16149 673 43 95.50 87.60 85.60 1.00 265.23 264.89 159.56 105.33
3 16291 679 43 72.60 88.20 86.10 1.00 264.63 264.95 159.60 105.35
4 14199 592 42 82.60 77.30 74.90 1.00 264.83 264.72 159.16 105.56
5 15066 628 42 81.40 81.40 79.40 1.00 264.83 264.80 158.97 105.83
6 14687 612 42 89.90 79.50 77.40 1.00 265.23 264.98 158.76 106.22
7 13859 577 42 67.40 75.20 73.00 1.00 264.93 265.01 158.54 106.47
8 14448 602 42 94.20 78.50 76.30 1.00 265.53 265.11 159.04 106.07
9 13907 579 43 78.20 75.60 73.30 1.00 265.63 265.52 159.27 106.25
10 13938 581 42 80.50 75.20 73.30 1.00 265.83 265.75 159.11 106.64
11 12267 511 42 61.70 66.90 64.70 1.00 265.63 265.60 159.53 106.07
12 13386 558 43 75.70 73.10 70.90 1.10 265.73 265.52 159.62 105.90
13 14623 609 42 79.60 79.60 77.40 1.00 265.63 265.59 159.72 105.87
14 15966 665 43 86.70 86.70 84.40 1.00 265.73 265.62 159.61 106.01
15 14504 604 43 68.10 78.60 76.60 1.00 265.33 265.54 159.40 106.14
16 12336 514 43 69.60 67.00 65.00 1.00 265.43 265.43 159.08 106.35
17 11809 492 43 64.50 64.50 62.40 0.90 265.43 265.41 159.44 105.97
18 11942 498 44 64.60 64.60 62.50 0.90 265.43 265.32 158.85 106.47
19 12199 508 43 61.30 66.50 64.20 1.10 265.23 265.33 159.06 106.27
20 13935 581 42 76.00 76.00 73.80 0.90 265.23 265.25 159.42 105.83
21 69.60 69.70 67.60 0.80 265.23 265.20 159.36 105.84
22 70.40 67.80 65.70 0.90 265.33 265.18 158.72 106.46
23 80.40 70.00 68.00 0.80 265.73 265.45 158.87 106.58
24 67.70 72.90 70.80 0.90 265.53 265.52 159.67 105.85
25 59.40 62.10 60.00 0.90 265.43 265.36 159.41 105.95
26 64.00 66.60 64.40 0.90 265.33 265.25 159.47 105.78
27 67.60 70.20 68.10 0.90 265.23 265.07 159.59 105.48
28
29
30
TOT283258  852        
AVG 14163 590 43 76.03 74.77 72.64 0.96 265.34 265.25 159.30 105.95
MAX 17748   123.50 97.50 95.50 1.10 265.83 265.75 160.28 106.64
MIN 11809   59.40 62.10 60.00 0.80 264.63 264.30 158.54 104.02
BUILDING STRONG®