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 67182 2799 222 117.00 114.80 114.80 0.00 1286.30 1286.18 961.85 324.33 0.23 152 1568.68
18 60122 2505 211 118.50 101.50 101.50 0.00 1286.70 1286.41 961.33 325.08 0.00 0 1568.67
19 52721 2197 205 125.40 88.90 88.90 0.00 1287.60 1287.31 959.96 327.35 0.00 0 1568.64
20 66783 2783 196 121.00 112.00 112.00 0.00 1287.80 1287.70 962.23 325.47 0.00 0 1568.56
21 67626 2818 194 114.80 113.10 113.10 0.00 1287.80 1287.81 962.22 325.59 0.00 0 1568.57
22 74110 3088 196 118.60 123.90 123.90 0.00 1287.70 1287.83 962.97 324.86 0.00 0 1568.59
23 80760 3365 191 120.60 135.20 135.20 0.00 1287.30 1287.54 964.05 323.49 0.00 0 1568.54
24 74063 3086 186 109.10 124.10 124.10 0.00 1287.00 1287.16 963.08 324.08 0.00 0 1568.58
25 65469 2728 191 101.40 109.40 109.40 0.00 1286.80 1286.88 961.52 325.36 0.00 0 1568.58
26 74190 3091 191 107.50 124.00 124.00 0.00 1286.40 1286.57 961.82 324.75 0.00 0 1568.60
27 72008 3000 185 120.60 121.40 121.40 0.00 1286.30 1286.44 962.51 323.93 0.00 0 1568.54
28 71624 2984 188 130.70 121.00 121.00 0.00 1286.60 1286.49 962.91 323.58 0.00 0 1568.54
29 71577 2982 200 118.00 120.80 120.80 0.00 1286.50 1286.59 962.20 324.39 0.00 0 1568.53
30 80700 3362 192 113.10 136.10 136.10 0.00 1285.90 1286.21 964.00 322.21 0.00 0 1568.53
31 75509 3146 193 107.80 127.40 127.40 0.00 1285.50 1285.61 963.66 321.95 0.00 0 1568.53
TOT1868209  6356           
AVG 60265 2511 205 102.39 101.45 101.45 0.00 1285.64 1285.64 960.83 324.80 0.01 9 1568.60
MAX 80760   130.70 136.10 136.10 0.00 1287.80 1287.83 964.05 327.77 0.23 152 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®