US Army Corps of Engineers

Grand Coulee Dam

October 2021

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 35443 1477 236 60.00 60.20 60.20 0.00 1282.90 1282.70 957.25 325.45 1.88 1210 1567.79
2 31882 1328 237 64.20 53.30 53.30 0.00 1283.00 1282.89 957.20 325.69 5.80 3744 1567.67
3 32648 1360 237 71.90 54.30 54.30 0.00 1283.30 1283.15 956.68 326.47 5.80 3744 1567.84
4 38947 1623 242 71.90 66.50 66.50 0.00 1283.40 1283.30 958.01 325.29 1.86 1201 1567.72
5 29398 1225 247 64.60 50.10 50.10 0.00 1283.60 1283.45 955.25 328.20 5.80 3744 1567.86
6 34168 1424 242 68.10 57.60 57.60 0.00 1283.70 1283.64 955.91 327.73 5.80 3744 1567.96
7 44384 1849 168 66.30 74.80 74.80 0.00 1283.40 1283.48 958.26 325.22 5.72 3690 1568.10
8 35299 1471 72 66.90 59.90 59.90 0.00 1283.40 1283.22 957.66 325.56 5.80 3743 1568.22
9 27193 1133 107 64.50 45.60 45.60 0.00 1283.70 1283.54 956.71 326.83 5.80 3743 1568.38
10 27033 1126 204 60.90 45.20 45.20 0.00 1284.00 1283.80 956.65 327.15 5.80 3743 1568.44
11 35451 1477 216 66.50 59.50 59.50 0.00 1284.00 1283.95 957.80 326.15 5.80 3744 1568.55
12 53167 2215 208 69.20 91.40 91.40 0.00 1283.40 1283.66 959.88 323.78 1.80 1158 1568.48
13 36210 1509 208 64.20 61.30 61.30 0.00 1283.40 1283.26 957.70 325.56 1.29 828 1568.23
14 29638 1235 201 63.50 49.60 49.60 0.00 1283.70 1283.47 957.18 326.29 4.44 2847 1568.24
15 34251 1427 205 69.50 57.00 57.00 0.00 1283.80 1283.72 956.70 327.02 5.80 3742 1568.38
16 65.10 52.20 52.20 0.00 1284.00 1283.87 956.83 327.04 1568.51
17 55.90 44.90 44.90 0.00 1284.10 1284.06 956.23 327.83 1568.65
18 57.00 46.80 46.80 0.00 1284.30 1284.17 956.02 328.15 1568.76
19 63.20 64.10 64.10 0.00 1284.20 1284.18 957.25 326.93 1568.55
20 65.10 65.10 65.10 0.00 1284.20 1284.19 957.50 326.69 1568.30
21 66.20 69.00 69.00 0.00 1284.10 1284.09 958.20 325.89 1568.10
22 50.10 64.70 64.70 0.00 1283.80 1283.82 957.10 326.72
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TOT525112  3030           
AVG 35007 1459 202 64.31 58.78 58.78 0.00 1283.70 1283.62 957.18 326.44 4.61 2975 1568.23
MAX 53167   71.90 91.40 91.40 0.00 1284.30 1284.19 959.88 328.20 5.80 3744 1568.76
MIN 27033   50.10 44.90 44.90 0.00 1282.90 1282.70 955.25 323.78 1.29 828 1567.67