US Army Corps of Engineers

Grand Coulee Dam

August 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 49015 2042 236 88.90 81.30 81.20 0.10 1285.40 1285.36 958.55 326.81 6.76 4733 1568.64
2 45463 1894 234 84.50 75.10 75.10 0.10 1285.30 1285.28 958.44 326.84 10.60 7200 1568.84
3 44748 1864 240 87.50 74.20 74.10 0.10 1285.40 1285.34 958.26 327.08 10.45 7092 1569.09
4 47638 1985 253 84.10 79.70 79.60 0.10 1285.40 1285.32 958.88 326.44 6.00 4030 1569.00
5 48389 2016 245 89.50 82.00 82.00 0.10 1285.40 1285.35 959.46 325.89 6.73 4733 1568.96
6 59360 2473 249 83.40 99.40 99.40 0.10 1284.80 1285.06 960.52 324.54 6.70 4733 1568.94
7 65368 2724 224 86.70 109.40 109.30 0.10 1284.10 1285.37 961.61 323.76 6.39 4519 1568.88
8 65138 2714 218 88.70 109.70 109.60 0.10 1283.40 1283.64 961.66 321.98 7.04 4958 1568.88
9 61273 2553 219 90.00 103.00 103.00 0.10 1282.80 1283.04 961.00 322.04 10.50 7199 1569.12
10 54401 2267 218 88.20 93.70 93.60 0.10 1282.50 1282.63 959.81 322.82 6.20 4407 1569.14
11 62453 2602 222 88.40 106.00 105.90 0.10 1282.00 1282.19 960.88 321.31 1.17 853 1568.68
12 60593 2525 219 89.80 102.20 102.10 0.10 1281.70 1282.74 960.74 322.00 0.00 0 1568.15
13 52459 2186 194 84.50 89.60 89.60 0.10 1281.50 1281.53 959.60 321.93 0.32 232 1567.58
14 50585 2108 174 86.80 87.80 87.80 0.10 1281.40 1281.46 959.35 322.11 4.80 3504 1567.31
15 56507 2354 176 85.60 96.30 96.20 0.10 1281.00 1281.15 960.22 320.93 5.12 3720 1567.13
16 48307 2013 169 83.70 82.50 82.40 0.10 1280.80 1280.82 958.79 322.03 8.50 5952 1567.25
17 49392 2058 179 90.60 84.00 83.90 0.10 1280.70 1280.79 959.08 321.71 8.50 5950 1567.40
18 52180 2174 182 81.30 89.00 88.90 0.10 1280.50 1280.59 960.07 320.52 5.23 3637 1567.29
19 45414 1892 178 85.60 78.50 78.40 0.10 1280.60 1280.53 959.08 321.45 5.15 3583 1567.18
20 45013 1876 188 90.40 78.60 78.60 0.10 1280.70 1280.66 959.08 321.58 5.16 3595 1567.03
21 50713 2113 174 87.00 87.10 87.00 0.10 1280.70 1280.76 959.28 321.48 2.97 2064 1566.70
22 56686 2362 183 86.80 97.60 97.50 0.10 1280.30 1280.45 959.78 320.67 3.42 2342 1566.38
23 52728 2197 174 84.40 90.60 90.50 0.10 1280.00 1280.19 959.13 321.06 3.47 2379 1566.14
24 55036 2293 173 85.70 95.00 94.90 0.10 1279.60 1279.90 959.80 320.10 8.99 6250 1566.23
25 58166 2424 168 80.10 99.90 99.80 0.10 1279.10 1279.25 961.02 318.23 2.09 1461 1565.89
26 54003 2250 170 87.90 94.10 94.00 0.10 1278.80 1278.91 960.23 318.68 0.35 243 1565.33
27 88.70 90.30 90.20 0.10 1278.70 1278.78 959.57 319.21 1565.09
28 87.10 104.00 103.90 0.10 1278.10 1278.39 961.30 317.09 1564.91
29 85.70 99.60 99.50 0.10 1277.70 1277.90 960.85 317.05 1564.72
30 77.70 88.30 88.20 0.10 1277.30 1277.53 959.75 317.78 1564.44
31 80.10 96.80 96.70 0.10 1276.70 1277.14 960.40 316.74 1564.30
TOT1391028  5259           
AVG 53501 2229 202 86.11 91.78 91.71 0.10 1281.37 1281.55 959.88 321.67 5.48 3822 1567.25
MAX 65368   90.60 109.70 109.60 0.10 1285.40 1285.37 961.66 327.08 10.60 7200 1569.14
MIN 44748   77.70 74.20 74.10 0.10 1276.70 1277.14 958.26 316.74 0.00 0 1564.30
BUILDING STRONG®