US Army Corps of Engineers

Grand Coulee Dam

September 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 50523 2105 198 66.70 87.10 87.10 0.00 1276.10 1276.46 960.16 316.30 14.12 9506 1564.95
2 41489 1729 205 69.90 71.90 71.90 0.00 1275.70 1275.81 958.65 317.16 10.33 6951 1565.25
3 40473 1686 208 61.70 69.40 69.30 0.10 1275.30 1275.49 957.53 317.96 7.29 4904 1565.35
4 31982 1333 213 62.40 54.30 54.30 0.00 1275.40 1275.31 955.81 319.50 7.36 4965 1565.50
5 33511 1396 209 62.20 57.10 57.00 0.10 1275.10 1275.26 956.35 318.91 15.60 10680 1566.20
6 36167 1507 209 65.90 62.30 62.20 0.10 1274.80 1274.96 957.75 317.21 15.57 10672 1566.82
7 33431 1393 213 72.60 58.10 58.00 0.10 1275.00 1274.82 957.97 316.85 4.83 3313 1566.94
8 28993 1208 216 66.80 49.50 49.50 0.00 1275.40 1275.14 956.29 318.85 4.17 2832 1566.84
9 29263 1219 216 74.60 52.10 52.10 0.00 1275.90 1275.62 956.18 319.44 4.17 2823 1566.75
10 35429 1476 215 71.70 61.80 61.70 0.10 1276.00 1275.91 957.11 318.80 4.32 2942 1566.72
11 33317 1388 193 72.70 57.10 57.00 0.10 1276.10 1276.03 957.62 318.41 13.70 9474 1567.16
12 24301 1013 170 74.40 40.80 40.80 0.00 1276.60 1276.29 955.97 320.32 13.70 9456 1567.80
13 32927 1372 169 78.90 56.50 56.40 0.10 1277.10 1276.81 957.01 319.80 2.89 1965 1567.97
14 32222 1343 228 75.50 56.20 56.10 0.10 1277.60 1277.31 956.48 320.83 1.91 1252 1567.92
15 33596 1400 218 75.40 57.60 57.60 0.00 1277.90 1277.74 956.98 320.76 5.70 3720 1567.88
16 37318 1555 222 75.80 63.70 63.60 0.10 1278.20 1278.04 957.84 320.20 1.92 1254 1567.82
17 32921 1372 217 81.70 55.40 55.40 0.00 1278.80 1278.40 957.16 321.24 1.93 1258 1567.66
18 27042 1127 227 73.70 46.70 46.70 0.00 1279.30 1278.92 956.83 322.09 5.70 3720 1567.63
19 25858 1077 218 58.20 43.30 43.30 0.00 1279.60 1279.34 956.04 323.30 5.70 3720 1567.68
20 33174 1382 232 69.90 56.10 56.00 0.00 1279.90 1279.74 957.18 322.56 1.99 1293 1567.65
21 79.80 66.00 65.90 0.00 1280.20 1280.06 957.77 322.29 1567.51
22 84.20 63.40 63.40 0.00 1280.60 1280.28 957.48 322.80 1567.48
23 97.50 80.50 80.40 0.00 1281.00 1280.82 957.51 323.31 1567.44
24 95.60 75.10 75.00 0.00 1281.40 1281.13 957.25 323.88 1567.42
25 77.80 57.70 57.60 0.00 1281.70 1281.57 956.12 325.45 1567.53
26 69.60 53.30 53.30 0.00 1282.00 1281.84 956.58 325.26 1567.89
27 71.10 58.30 58.20 0.00 1282.20 1282.07 957.34 324.73 1568.00
28
29
30
TOT673937  4196           
AVG 33697 1404 210 73.57 59.68 59.62 0.03 1277.96 1277.82 957.15 320.67 7.14 4835 1567.10
MAX 50523   97.50 87.10 87.10 0.10 1282.20 1282.07 960.16 325.45 15.60 10680 1568.00
MIN 24301   58.20 40.80 40.80 0.00 1274.80 1274.82 955.81 316.30 1.91 1252 1564.95