Libby Dam & Lake Koocanusa
May 2026
| Day of Month | Total Generation MWh | Average Generation MW | Station Use MWh | Inflow kcfs | Total Outflow kcfs | Generation Flow kcfs | Spill kcfs | Midnight Reservoir Elevation | Average Forebay Elevation | Average Tailwater Elevation | Average Head feet | Midnight Storage kaf |
|---|
| 1 | 5461 | 228 | 16 | 14.46 | 12.04 | 12.04 | 0.00 | 2369.88 | 2369.79 | 2121.16 | 248.63 | 1718.60 |
| 2 | 5430 | 226 | 15 | 16.30 | 12.00 | 12.00 | 0.00 | 2370.20 | 2370.04 | 2121.13 | 248.91 | 1727.20 |
| 3 | 5429 | 226 | 15 | 19.69 | 12.00 | 12.00 | 0.00 | 2370.77 | 2370.48 | 2121.12 | 249.36 | 1742.40 |
| 4 | 5429 | 226 | 15 | 24.87 | 12.00 | 12.00 | 0.00 | 2371.72 | 2371.25 | 2121.11 | 250.14 | 1768.00 |
| 5 | 5448 | 227 | 15 | 28.21 | 12.00 | 12.00 | 0.00 | 2372.91 | 2372.32 | 2121.11 | 251.21 | 1800.10 |
| 6 | 4319 | 180 | 15 | 28.28 | 10.04 | 10.04 | 0.00 | 2374.24 | 2373.61 | 2120.32 | 253.29 | 1836.30 |
| 7 | 4348 | 181 | 14 | 29.07 | 10.00 | 10.00 | 0.00 | 2375.62 | 2374.97 | 2120.27 | 254.70 | 1874.20 |
| 8 | 4403 | 183 | 12 | 34.24 | 10.00 | 10.00 | 0.00 | 2377.36 | 2376.52 | 2120.16 | 256.36 | 1922.30 |
| 9 | 4463 | 186 | 12 | 37.57 | 10.00 | 10.00 | 0.00 | 2379.32 | 2378.37 | 2120.16 | 258.21 | 1977.00 |
| 10 | 4503 | 188 | 12 | 40.15 | 10.00 | 10.00 | 0.00 | 2381.44 | 2380.42 | 2120.14 | 260.28 | 2036.80 |
| 11 | 4554 | 190 | 12 | 42.84 | 10.00 | 10.00 | 0.00 | 2383.72 | 2382.63 | 2120.15 | 262.48 | 2102.00 |
| 12 | 4650 | 194 | 13 | 43.26 | 10.00 | 10.00 | 0.00 | 2386.00 | 2384.91 | 2120.27 | 264.64 | 2168.00 |
| 13 | 4712 | 196 | 13 | 39.53 | 10.00 | 10.00 | 0.00 | 2388.00 | 2387.05 | 2120.35 | 266.70 | 2226.60 |
| 14 | 4770 | 199 | 14 | 43.18 | 10.00 | 10.00 | 0.00 | 2390.22 | 2389.15 | 2120.36 | 268.79 | 2292.40 |
| 15 | 4825 | 201 | 14 | 44.69 | 10.00 | 10.00 | 0.00 | 2392.50 | 2391.43 | 2120.36 | 271.07 | 2361.20 |
| 16 | 4864 | 203 | 16 | 40.43 | 10.00 | 10.00 | 0.00 | 2394.46 | 2393.56 | 2120.36 | 273.20 | 2421.60 |
| 17 | 4929 | 205 | 16 | 34.15 | 10.00 | 10.00 | 0.00 | 2395.99 | 2395.31 | 2120.38 | 274.93 | 2469.50 |
| 18 | 4920 | 205 | 16 | 28.86 | 10.00 | 10.00 | 0.00 | 2397.17 | 2396.64 | 2120.36 | 276.28 | 2506.90 |
| 19 | 4955 | 206 | 15 | 26.31 | 10.00 | 10.00 | 0.00 | 2398.18 | 2397.69 | 2120.36 | 277.33 | 2539.30 |
| 20 | 4972 | 207 | 16 | 23.35 | 10.00 | 10.00 | 0.00 | 2399.00 | 2398.61 | 2120.37 | 278.24 | 2565.80 |
| 21 | 4965 | 207 | 18 | 21.65 | 10.00 | 10.00 | 0.00 | 2399.71 | 2399.37 | 2120.37 | 279.00 | 2588.90 |
| 22 | 4956 | 206 | 16 | 22.22 | 10.00 | 10.00 | 0.00 | 2400.45 | 2400.11 | 2120.36 | 279.75 | 2613.10 |
| 23 | 4969 | 207 | 16 | 21.81 | 10.00 | 10.00 | 0.00 | 2401.16 | 2400.83 | 2120.36 | 280.47 | 2636.60 |
| 24 | 4966 | 207 | 16 | 24.92 | 10.00 | 10.00 | 0.00 | 2402.05 | 2401.62 | 2120.35 | 281.27 | 2666.20 |
| 25 | 5498 | 229 | 16 | 30.05 | 11.04 | 11.04 | 0.00 | 2403.17 | 2402.64 | 2120.67 | 281.97 | 2703.90 |
| 26 | 12218 | 509 | 18 | 36.60 | 25.00 | 25.00 | 0.00 | 2403.85 | 2403.47 | 2124.36 | 279.11 | 2726.90 |
| 27 | 11980 | 499 | 17 | 46.94 | 24.49 | 24.49 | 0.00 | 2405.15 | 2404.46 | 2124.23 | 280.23 | 2771.40 |
| 28 | 12120 | 505 | 17 | 60.23 | 24.77 | 24.77 | 0.00 | 2407.17 | 2406.21 | 2124.27 | 281.94 | 2841.80 |
| 29 | | | | 64.80 | 25.00 | 25.00 | 0.00 | 2409.39 | 2408.33 | 2124.33 | 284.00 | 2920.80 |
| 30 | | | | 66.70 | 25.00 | 25.00 | 0.00 | 2411.67 | 2410.58 | 2124.33 | 286.25 | 3003.50 |
| 31 | | | | 68.08 | 25.00 | 25.00 | 0.00 | 2413.99 | 2412.89 | 2124.35 | 288.54 | 3089.00 |
|
| TOT | 159054 | | 418 | | | | | | | | | |
| AVG | 5680 | 237 | 15 | 35.59 | 13.24 | 13.24 | 0.00 | 2391.18 | 2390.49 | 2121.23 | 269.27 | 2342.53 |
|
| MAX | 12218 | | | 68.08 | 25.00 | 25.00 | 0.00 | 2413.99 | 2412.89 | 2124.36 | 288.54 | 3089.00 |
| MIN | 4319 | | | 14.46 | 10.00 | 10.00 | 0.00 | 2369.88 | 2369.79 | 2120.14 | 248.63 | 1718.60 |