US Army Corps of Engineers

The Dalles Dam

May 2026

Day of MonthTotal Generation MWhAverage Generation MWStation Use MWhInflow kcfsTotal Outflow kcfsGeneration Flow kcfsSpill kcfsMidnight Reservoir ElevationAverage Forebay ElevationAverage Tailwater ElevationAverage Head feet
1 19747 823 48 228.60 233.60 136.80 91.00 157.24 158.35 78.74 79.61
2 17167 715 48 214.90 217.40 118.60 93.00 156.76 158.08 78.48 79.60
3 18539 772 48 228.20 221.40 128.60 87.00 158.03 158.32 79.18 79.14
4 18668 778 48 223.70 223.10 128.80 88.50 158.18 158.72 79.00 79.72
5 20250 844 48 241.30 236.70 141.90 89.00 158.99 158.35 79.69 78.66
6 16550 690 48 211.60 214.10 113.80 94.50 158.53 158.70 78.85 79.85
7 17452 727 48 213.50 210.60 118.80 86.00 159.12 159.40 78.79 80.61
8 18853 786 48 215.00 219.30 129.40 84.00 158.31 158.96 79.35 79.61
9 18746 781 48 222.10 223.20 129.40 88.00 158.09 158.66 79.19 79.47
10 19894 829 48 236.80 234.50 139.70 89.00 158.53 157.97 79.95 78.02
11 20210 842 48 236.70 240.10 140.30 94.00 157.89 158.81 79.89 78.92
12 18367 765 48 230.50 228.50 127.00 95.70 158.26 158.74 79.37 79.37
13 18539 772 48 226.80 227.00 129.90 91.30 158.21 158.42 80.38 78.04
14 18697 779 48 226.80 227.30 130.50 91.00 158.13 158.64 80.08 78.56
15 20900 871 48 243.50 242.90 146.10 91.00 158.24 158.69 80.16 78.53
16 18412 767 48 230.40 229.80 127.00 97.00 158.33 158.67 79.20 79.47
17 18436 768 48 223.70 223.90 126.10 92.00 158.31 158.84 78.73 80.11
18 18724 780 48 223.30 225.00 129.20 90.00 157.96 158.25 78.83 79.42
19 16339 681 48 207.70 207.30 111.50 90.00 158.08 158.54 78.23 80.31
20 16790 700 48 199.90 203.20 114.40 83.00 157.45 159.04 78.59 80.45
21 14963 623 48 197.20 188.70 101.90 81.00 159.03 158.62 78.11 80.51
22 18327 764 48 197.90 206.10 125.30 75.00 157.48 158.92 78.80 80.12
23 11640 485 48 174.20 167.10 78.80 82.50 158.80 158.48 77.48 81.00
24 14672 611 48 170.30 171.10 98.30 67.00 158.67 159.01 77.35 81.66
25 15344 639 48 176.50 177.10 103.30 68.00 158.56 159.08 77.63 81.45
26 15175 632 48 179.70 178.80 102.00 71.00 158.70 159.21 77.73 81.48
27 18372 766 48 201.90 203.00 126.20 71.00 158.54 158.72 79.02 79.70
28 18584 774 48 214.30 214.80 128.00 81.00 158.42 158.99 79.46 79.53
29 192.10 193.20 101.40 86.00 158.24 158.59 78.36 80.23
30 202.80 196.50 113.70 77.00 159.41 159.10 77.77 81.33
31 219.20 225.20 140.40 79.00 158.26 159.24 79.21 80.03
TOT498357  1344        
AVG 17798 742 48 213.26 213.24 122.16 85.27 158.28 158.71 78.89 79.82
MAX 20900   243.50 242.90 146.10 97.00 159.41 159.40 80.38 81.66
MIN 11640   170.30 167.10 78.80 67.00 156.76 157.97 77.35 78.02
BUILDING STRONG®