US Army Corps of Engineers

Libby Dam & Lake Koocanusa

June 2026

Day of MonthTotal Generation MWhAverage Generation MWStation Use MWhInflow kcfsTotal Outflow kcfsGeneration Flow kcfsSpill kcfsMidnight Reservoir ElevationAverage Forebay ElevationAverage Tailwater ElevationAverage Head feetMidnight Storage kaf
1 12716 530 18 63.60 25.00 25.00 0.00 2416.04 2415.09 2124.36 290.73 3165.60
2 12793 533 18 60.65 25.00 25.00 0.00 2417.91 2417.05 2124.35 292.70 3236.30
3 12873 536 17 53.13 25.00 25.00 0.00 2419.37 2418.72 2124.34 294.38 3292.10
4 12980 541 17 48.12 25.00 25.00 0.00 2420.56 2420.00 2124.35 295.65 3338.00
5 12987 541 18 48.67 25.00 25.00 0.00 2421.77 2421.18 2124.35 296.83 3384.90
6 12973 541 18 46.06 25.00 25.00 0.00 2422.84 2422.32 2124.33 297.99 3426.70
7 13030 543 18 37.46 25.00 25.00 0.00 2423.57 2423.22 2124.34 298.88 3451.50
8 12067 503 19 36.79 22.50 22.50 0.00 2424.19 2423.91 2123.98 299.93 3479.80
9 12000 500 17 31.06 22.50 22.50 0.00 2424.62 2424.42 2123.96 300.46 3496.80
10 11897 496 18 31.49 22.50 22.50 0.00 2425.07 2424.82 2123.90 300.92 3514.60
11 10675 445 17 30.61 20.00 20.00 0.00 2425.60 2425.35 2123.17 302.18 3535.70
12 10684 445 17 30.03 20.00 20.00 0.00 2426.10 2425.89 2123.17 302.72 3555.60
13 10663 444 17 30.07 20.00 20.00 0.00 2426.60 2426.36 2123.16 303.20 3575.60
14 10646 444 16 29.49 20.00 20.00 0.00 2427.07 2426.86 2123.14 303.72 3594.40
15 10698 446 15 29.31 20.00 20.00 0.00 2427.53 2427.32 2123.16 304.16 3612.90
16 32.99 20.00 20.00 0.00 2428.17 2427.83 2123.15 304.68 3638.60
17 33.85 20.00 20.00 0.00 2428.85 2428.52 2123.15 305.37 3666.10
18 34.27 17.50 17.50 0.00 2429.67 2429.30 2122.74 306.56 3699.40
19 30.23 17.50 17.50 0.00 2430.29 2430.02 2122.70 307.32 3724.70
20 28.18 15.00 15.00 0.00 2430.93 2430.61 2121.81 308.80 3750.80
21 29.06 15.00 15.00 0.00 2431.61 2431.29 2121.84 309.45 3778.70
22 27.14 13.04 13.04 0.00 2432.29 2431.95 2121.37 310.58 3806.70
23
24
25
26
27
28
29
30
TOT179680  261         
AVG 11979 499 17 37.38 20.93 20.93 0.00 2425.48 2425.09 2123.40 301.69 3532.98
MAX 13030   63.60 25.00 25.00 0.00 2432.29 2431.95 2124.36 310.58 3806.70
MIN 10646   27.14 13.04 13.04 0.00 2416.04 2415.09 2121.37 290.73 3165.60
BUILDING STRONG®