US Army Corps of Engineers

Libby Dam & Lake Koocanusa

July 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 6062 253 14 35.39 11.00 11.00 0.00 2438.83 2438.31 2120.71 317.60
2 6059 252 14 31.43 11.00 11.00 0.00 2439.78 2439.34 2120.69 318.65 4121.20
3 5709 238 13 28.36 10.00 10.00 0.00 2440.63 2440.24 2120.38 319.86 4157.60
4 5705 238 13 26.04 10.00 10.00 0.00 2441.37 2441.02 2120.37 320.65 4189.50
5 5710 238 13 24.35 10.00 10.00 0.00 2442.03 2441.72 2120.36 321.36 4217.90
6 5719 238 13 23.74 10.00 10.00 0.00 2442.66 2442.38 2120.36 322.02 4245.20
7 5159 215 13 21.03 9.00 9.00 0.00 2443.21 2442.96 2120.06 322.90 4269.10
8 5243 218 13 19.52 9.00 9.00 0.00 2443.69 2443.47 2120.08 323.39 4289.90
9 5243 218 13 20.43 9.00 9.00 0.00 2444.21 2443.96 2120.08 323.88 4312.60
10 5249 219 13 20.01 9.00 9.00 0.00 2444.71 2444.47 2120.08 324.39 4334.50
11 5252 219 12 19.16 9.00 9.00 0.00 2445.17 2444.93 2120.08 324.85 4354.60
12 5246 219 12 17.40 9.00 9.00 0.00 2445.55 2445.35 2120.08 325.27 4371.30
13 5292 220 12 17.64 9.00 9.00 0.00 2445.94 2445.76 2120.11 325.65 4388.40
14 5337 222 11 16.32 9.00 9.00 0.00 2446.27 2446.11 2120.11 326.00 4403.00
15 5332 222 11 15.45 9.00 9.00 0.00 2446.56 2446.43 2120.11 326.32 4415.80
16 5328 222 11 15.46 9.00 9.00 0.00 2446.85 2446.72 2120.10 326.62 4428.60
17 5339 222 11 15.01 9.00 9.00 0.00 2447.12 2447.00 2120.11 326.89 4440.50
18 5336 222 11 14.13 9.00 9.00 0.00 2447.35 2447.22 2120.10 327.12 4450.70
19 5329 222 11 14.14 9.00 9.00 0.00 2447.58 2447.47 2120.14 327.33 4460.90
20 5339 222 11 14.82 9.00 9.00 0.00 2447.84 2447.73 2120.10 327.63 4472.40
21 5327 222 11 13.25 9.00 9.00 0.00 2448.03 2447.96 2120.09 327.87 4480.90
22 5342 223 11 12.58 9.00 9.00 0.00 2448.19 2448.13 2120.10 328.03 4488.00
23 5345 223 11 12.36 9.00 9.00 0.00 2448.34 2448.26 2120.10 328.16 4494.60
24 5347 223 11 11.69 9.00 9.00 0.00 2448.46 2448.40 2120.10 328.30 4500.00
25 5340 223 11 11.91 9.00 9.00 0.00 2448.59 2448.53 2120.11 328.42 4505.80
26 5338 222 11 11.25 9.00 9.00 0.00 2448.69 2448.63 2120.11 328.52 4510.20
27 5328 222 11 11.02 9.00 9.00 0.00 2448.78 2448.72 2120.10 328.62 4514.20
28 5284 220 11 10.80 9.00 9.00 0.00 2448.86 2448.81 2120.10 328.71 4517.80
29 5267 219 11 9.90 9.00 9.00 0.00 2448.90 2448.88 2120.10 328.78 4519.60
30 5278 220 12 9.45 9.00 9.00 0.00 2448.92 2448.92 2120.08 328.84 4520.50
31 9.45 9.00 9.00 0.00 2448.94 2448.94 2120.07 328.87 4521.40
TOT162186  355         
AVG 5406 225 12 17.21 9.26 9.26 0.00 2445.87 2445.70 2120.17 325.53 4396.56
MAX 6062   35.39 11.00 11.00 0.00 2448.94 2448.94 2120.71 328.87 4521.40
MIN 5159   9.45 9.00 9.00 0.00 2438.83 2438.31 2120.06 317.60 4121.20