US Army Corps of Engineers

Chief Joseph Dam & Rufus Woods Lake

September 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 25111 1046 26 75.90 77.90 77.90 0.00 953.10 953.30 779.40 173.90
2 24450 1019 24 78.90 75.80 75.80 0.00 953.90 953.20 779.60 173.60
3 22390 933 27 67.70 69.70 69.70 0.00 953.40 953.30 780.30 173.00
4 17270 720 27 51.50 54.60 54.60 0.00 952.60 952.60 779.10 173.50
5 14688 612 25 46.80 44.90 44.90 0.00 953.10 953.00 777.00 176.00
6 14965 624 23 45.10 46.90 46.90 0.00 952.70 952.60 779.90 172.70
7 15652 652 25 49.50 49.10 49.10 0.00 952.80 952.70 780.70 172.00
8 17717 738 27 54.30 55.50 55.50 0.00 952.50 952.90 780.70 172.20
9 13188 550 24 42.40 40.90 40.90 0.00 952.90 953.00 779.40 173.60
10 15393 641 26 45.40 47.70 47.70 0.00 952.30 952.90 779.10 173.80
11 15827 659 28 49.30 48.90 48.90 0.00 952.40 952.80 778.80 174.00
12 16140 672 27 52.00 50.10 50.10 0.00 952.90 952.60 779.00 173.60
13 14670 611 26 46.20 45.40 45.40 0.00 953.10 952.60 779.50 173.10
14 12997 542 25 39.00 40.20 40.20 0.00 952.80 952.70 779.20 173.50
15 17727 739 25 55.60 55.60 55.60 0.00 952.80 952.90 780.30 172.60
16 24805 1034 24 78.40 78.00 78.00 0.00 952.90 952.80 781.30 171.50
17 24789 1033 25 81.90 77.60 77.60 0.00 954.00 952.50 780.80 171.70
18 26265 1094 27 81.40 81.80 81.80 0.00 953.90 953.10 780.80 172.30
19 24995 1041 27 71.80 78.00 78.00 0.00 952.30 952.60 780.10 172.50
20 14990 625 27 52.80 46.20 46.20 0.00 954.00 953.00 777.50 175.50
21 14333 597 25 47.00 43.90 43.90 0.00 954.80 954.40 779.20 175.20
22 17762 740 25 52.60 54.90 54.90 0.00 954.20 954.50 779.80 174.70
23 16627 693 24 47.90 51.40 51.40 0.00 953.30 954.30 779.40 174.90
24 14119 588 23 49.40 43.20 43.20 0.00 954.90 954.30 777.50 176.80
25 14320 597 24 42.70 43.50 43.50 0.00 954.70 954.70 777.40 177.30
26 17820 742 24 52.80 55.10 55.10 0.00 954.10 954.60 779.70 174.90
27 15745 656 24 47.80 48.20 48.20 0.00 954.00 954.00 779.20 174.80
28 16425 684 24 50.90 50.50 50.50 0.00 954.10 954.60 779.60 175.00
29 16599 692 24 50.50 50.10 50.10 0.00 954.20 954.40 779.40 175.00
30 15730 655 21 47.80 48.60 48.60 0.00 954.00 954.50 779.70 174.80
TOT533509  753        
AVG 17784 741 25 55.18 55.14 55.14 0.00 953.42 953.38 779.45 173.93
MAX 26265   81.90 81.80 81.80 0.00 954.90 954.70 781.30 177.30
MIN 12997   39.00 40.20 40.20 0.00 952.30 952.50 777.00 171.50
BUILDING STRONG®