US Army Corps of Engineers

John Day & Lake Umatilla

July 2025

Day of MonthTotal Generation MWhAverage Generation MWStation Use MWhInflow kcfsTotal Outflow kcfsGeneration Flow kcfsSpill kcfsMidnight Reservoir ElevationAverage Forebay ElevationAverage Tailwater ElevationAverage Head feet
1 16935 706 43 147.90 141.30 91.30 48.80 263.84 263.82 160.44 103.38
2 18423 768 42 150.50 155.90 100.30 54.30 263.62 263.70 161.00 102.70
3 16788 699 42 140.00 141.80 91.00 49.60 263.54 263.65 160.47 103.18
4 14263 594 41 127.50 120.20 76.70 42.10 263.83 263.77 160.23 103.54
5 14436 601 42 118.50 121.00 77.70 42.00 263.73 263.88 160.39 103.49
6 14888 620 41 118.80 124.20 80.40 42.60 263.51 263.74 160.36 103.38
7 14343 598 41 122.80 119.60 77.00 41.50 263.65 263.60 159.89 103.71
8 15827 659 42 129.80 133.00 85.80 46.00 263.52 263.70 160.64 103.06
9 13571 565 42 126.60 114.60 72.90 40.20 264.01 263.90 160.12 103.78
10 12217 509 41 100.50 103.10 65.80 35.90 263.91 264.03 160.48 103.55
11 12664 528 41 102.40 106.60 68.20 37.20 263.74 263.80 160.30 103.50
12 12714 530 41 105.40 107.90 68.50 38.30 263.63 263.75 160.26 103.49
13 13203 550 41 115.80 110.90 71.00 38.50 263.83 263.86 160.17 103.69
14 14347 598 42 125.20 120.30 76.90 42.20 264.02 263.89 159.86 104.03
15 15371 640 41 125.90 127.90 82.30 44.30 263.94 264.05 160.04 104.01
16 15945 664 42 136.20 133.90 85.60 46.80 264.03 264.08 160.18 103.90
17 17424 726 41 136.30 146.40 93.80 51.40 263.64 263.94 160.11 103.83
18 16614 692 42 138.80 139.10 89.20 48.50 263.62 263.64 159.87 103.77
19 14834 618 41 127.50 124.60 79.70 43.70 263.74 263.74 160.11 103.63
20 13916 580 41 122.80 115.90 74.30 40.30 264.01 263.97 159.59 104.38
21 14558 607 41 124.80 121.70 78.00 42.40 264.12 264.15 160.20 103.95
22 16228 676 42 129.90 135.30 87.00 47.10 263.91 264.10 160.12 103.98
23 14922 622 43 115.60 125.30 80.40 43.50 263.52 263.99 160.45 103.54
24 12593 525 43 113.60 106.10 67.80 37.10 263.82 263.56 160.07 103.49
25 13712 571 42 117.80 115.60 73.80 40.40 263.91 264.05 160.63 103.42
26 15170 632 41 124.90 127.20 81.70 44.10 263.81 264.01 160.39 103.62
27 13844 577 41 114.10 116.70 74.60 40.70 263.71 263.88 160.47 103.41
28 14105 588 41 120.50 117.70 75.30 41.10 263.82 263.87 159.41 104.46
29 15241 635 41 125.20 127.40 81.50 44.60 263.73 263.99 159.61 104.38
30 15461 644 41 122.00 129.60 83.20 45.00 263.42 263.74 159.91 103.83
31 14552 606 41 134.30 122.20 78.20 42.70 263.91 263.66 159.98 103.68
TOT459109  1289        
AVG 14810 617 42 124.58 124.29 79.67 43.32 263.78 263.86 160.19 103.67
MAX 18423   150.50 155.90 100.30 54.30 264.12 264.15 161.00 104.46
MIN 12217   100.50 103.10 65.80 35.90 263.42 263.56 159.41 102.70
BUILDING STRONG®