US Army Corps of Engineers

John Day & Lake Umatilla

April 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 34286 1429 50 228.70 220.80 184.60 34.90 265.92 265.86 161.77 104.09
2 35604 1483 50 200.60 209.60 191.10 17.20 265.52 265.65 161.50 104.15
3 31215 1301 49 181.20 178.60 167.60 9.80 265.62 265.55 161.26 104.29
4 32680 1362 47 194.00 186.10 175.10 9.80 265.92 265.85 161.39 104.46
5 33884 1412 48 190.30 192.90 181.70 9.80 265.82 265.86 161.49 104.37
6 33547 1398 47 185.60 191.00 179.90 9.80 265.62 265.73 161.40 104.33
7 28514 1188 48 165.60 162.90 152.10 9.80 265.72 265.53 160.59 104.94
8 28302 1179 48 157.30 162.70 151.60 9.80 265.51 265.54 161.12 104.42
9 31071 1295 48 183.40 177.90 166.50 9.80 265.72 265.61 161.24 104.37
10 18630 776 46 189.70 208.00 99.40 107.50 265.02 265.25 160.46 104.79
11 18411 767 46 227.50 217.00 99.30 116.40 265.42 265.35 161.42 103.93
12 19268 803 47 238.60 233.50 103.80 128.50 265.62 265.52 161.50 104.02
13 19780 824 46 239.80 239.80 106.50 132.20 265.61 265.63 161.60 104.03
14 21823 909 46 269.40 264.20 117.90 145.10 265.72 265.72 162.17 103.55
15 20643 860 45 247.40 247.60 111.10 135.20 265.81 265.91 162.03 103.88
16 21144 881 44 250.20 260.80 113.00 146.50 265.41 265.55 162.09 103.46
17 19401 808 44 237.40 240.10 104.50 134.50 265.31 265.12 161.35 103.77
18 19638 818 44 226.10 226.00 105.70 118.90 265.32 265.32 161.47 103.85
19 18699 779 44 222.70 214.80 100.40 113.10 265.61 265.47 161.45 104.02
20 19545 814 45 231.10 231.60 105.00 125.20 265.59 265.59 161.56 104.03
21 18382 766 47 203.30 216.40 98.50 116.60 265.09 265.24 161.01 104.23
22 17024 709 47 196.10 205.70 90.80 116.00 265.20 265.16 160.94 104.22
23 18233 760 49 211.60 206.30 97.40 107.50 265.40 265.26 160.80 104.46
24 18502 771 44 211.30 208.60 98.90 108.60 265.50 265.48 161.05 104.43
25 17812 742 43 208.30 202.80 94.80 106.70 265.71 265.67 160.86 104.81
26 17212 717 46 190.60 198.70 92.00 105.30 265.40 265.51 161.01 104.50
27 16877 703 48 188.40 188.60 90.60 96.50 265.40 265.28 161.42 103.86
28 16731 697 48 186.30 183.60 89.30 93.10 265.50 265.61 160.85 104.76
29 17252 719 48 196.50 194.10 92.50 100.40 265.59 265.40 161.10 104.30
30 20074 836 48 219.80 219.10 107.30 110.50 265.59 265.74 161.33 104.41
TOT684183  1401        
AVG 22806 950 47 209.29 209.66 122.30 86.17 265.54 265.53 161.31 104.22
MAX 35604   269.40 264.20 191.10 146.50 265.92 265.91 162.17 104.94
MIN 16731   157.30 162.70 89.30 9.80 265.02 265.12 160.46 103.46
BUILDING STRONG®