US Army Corps of Engineers

Chief Joseph Dam & Rufus Woods Lake

January 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 41646 1735 36 133.10 135.80 135.80 0.00 952.20 952.50 785.40 167.10
2 39470 1645 34 125.10 127.40 127.40 0.00 951.60 951.60 785.00 166.60
3 38394 1600 33 121.80 122.20 122.20 0.00 951.50 951.50 784.00 167.50
4 32085 1337 34 99.10 101.00 101.00 0.00 952.00 951.70 781.20 170.50
5 40530 1689 34 134.00 131.70 131.70 0.00 952.60 951.80 784.80 167.00
6 42994 1791 34 140.50 151.70 142.00 9.70 952.20 953.10 786.10 167.00
7 43596 1816 32 149.90 149.20 146.20 3.00 952.30 952.40 786.20 166.20
8 41960 1748 37 142.30 138.80 138.80 0.00 953.10 952.50 785.20 167.30
9 43475 1811 34 140.00 145.40 145.40 0.00 951.70 952.30 785.70 166.60
10 41393 1725 33 136.80 136.40 136.40 0.00 951.80 951.80 785.50 166.30
11 42533 1772 32 146.40 141.00 141.00 0.00 953.20 951.70 785.60 166.10
12 43513 1813 32 142.10 145.20 145.20 0.00 952.40 952.50 785.70 166.80
13 42442 1768 32 139.00 140.20 140.20 0.00 952.10 952.30 785.30 167.00
14 44070 1836 32 151.30 149.00 149.00 0.00 952.70 952.70 786.10 166.60
15 43940 1831 32 146.10 149.20 149.20 0.00 951.90 952.00 785.80 166.20
16 43372 1807 33 149.50 144.50 144.50 0.00 953.20 952.60 785.30 167.30
17 44096 1837 33 145.60 147.90 147.90 0.00 952.60 953.30 785.60 167.70
18 44108 1838 32 150.50 149.00 149.00 0.00 953.00 952.60 785.60 167.00
19 44302 1846 32 147.90 148.70 148.70 0.00 952.80 953.50 785.60 167.90
20 43372 1807 33 143.60 145.90 145.90 0.00 952.20 952.00 785.50 166.50
21 145.60 141.00 141.00 0.00 953.40 952.30 784.80 167.50
22 138.50 141.60 141.60 0.00 952.60 953.00 784.50 168.50
23 952.50
24 147.40 144.30 144.30 0.00 953.30 953.20 785.10 168.10
25 143.50 147.00 147.00 0.00 952.40 953.10 785.20 167.90
26 140.80 138.50 138.50 0.00 953.00 952.20 783.60 168.60
27 136.90 133.00 133.00 0.00 954.00 953.00 782.90 170.10
28
29
30
31
TOT841291  662        
AVG 42065 1753 33 139.90 140.22 139.73 0.49 952.53 952.43 785.05 167.38
MAX 44302   151.30 151.70 149.20 9.70 954.00 953.50 786.20 170.50
MIN 32085   99.10 101.00 101.00 0.00 951.50 951.50 781.20 166.10
BUILDING STRONG®