US Army Corps of Engineers

Grand Coulee Dam

December 2025

Day of MonthTotal Generation MWhAverage Generation MWStation Use MWhInflow kcfsTotal Outflow kcfsGeneration Flow kcfsSpill kcfsMidnight Reservoir ElevationAverage Forebay ElevationAverage Tailwater ElevationAverage Head feetBanks Lake Pump kcfsBanks Lake Pump MWhBanks Lake Elev
1 52279 2178 201 84.40 89.20 89.20 0.00 1284.60 1284.59 959.96 324.63 0.00 0 1568.64
2 46094 1921 216 82.40 76.80 76.80 0.00 1284.80 1284.68 958.38 326.30 0.00 0 1568.63
3 56631 2360 218 91.70 95.10 95.10 0.00 1284.70 1284.73 960.39 324.34 0.19 120 1568.64
4 61363 2557 221 94.70 102.70 102.70 0.00 1284.50 1284.56 960.90 323.66 0.00 0 1568.64
5 69065 2878 212 85.90 117.20 117.20 0.00 1283.70 1283.94 962.22 321.72 0.00 0 1568.39
6 60235 2510 216 85.80 101.60 101.60 0.00 1283.20 1283.51 960.56 322.95 0.00 0 1568.61
7 57349 2390 218 90.10 96.40 96.40 0.00 1283.10 1283.22 960.25 322.97 0.00 0 1568.62
8 55896 2329 211 83.20 94.10 94.10 0.00 1282.80 1282.93 960.29 322.64 0.00 0 1568.64
9 41468 1728 214 93.60 69.70 69.70 0.00 1283.40 1283.19 957.79 325.40 0.00 0 1568.60
10 35878 1495 214 89.70 59.70 59.70 0.00 1284.20 1283.87 956.82 327.05 0.00 0 1568.63
11 36389 1516 214 82.80 62.90 62.90 0.00 1284.70 1284.52 957.26 327.26 0.00 0 1568.61
12 36348 1514 217 81.30 60.20 60.20 0.00 1285.20 1284.91 957.47 327.44 0.00 0 1568.61
13 41544 1731 214 86.10 68.90 68.90 0.00 1285.60 1285.50 957.73 327.77 0.00 0 1568.61
14 53226 2218 208 97.80 89.80 89.80 0.00 1285.90 1285.84 959.78 326.06 0.00 0 1568.61
15 53687 2237 206 91.00 89.80 89.80 0.00 1285.90 1285.93 959.54 326.39 0.00 0 1568.68
16 56313 2346 215 109.50 97.10 97.10 0.00 1286.20 1286.05 960.20 325.85 0.00 0 1568.65
17 117.00 114.80 114.80 0.00 1286.30 1286.18 961.85 324.33 1568.68
18 118.50 101.50 101.50 0.00 1286.70 1286.41 961.33 325.08 1568.67
19 125.40 88.90 88.90 0.00 1287.60 1287.31 959.96 327.35 1568.64
20 121.00 112.00 112.00 0.00 1287.80 1287.70 962.23 325.47 1568.56
21 114.80 113.10 113.10 0.00 1287.80 1287.81 962.22 325.59 1568.57
22 118.60 123.90 123.90 0.00 1287.70 1287.83 962.97 324.86 1568.59
23 120.60 135.20 135.20 0.00 1287.30 1287.54 964.05 323.49 1568.54
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TOT813765  3415           
AVG 50860 2119 213 98.52 93.94 93.94 0.00 1285.38 1285.34 960.18 325.16 0.01 8 1568.61
MAX 69065   125.40 135.20 135.20 0.00 1287.80 1287.83 964.05 327.77 0.19 120 1568.68
MIN 35878   81.30 59.70 59.70 0.00 1282.80 1282.93 956.82 321.72 0.00 0 1568.39
BUILDING STRONG®