US Army Corps of Engineers

Grand Coulee Dam

September 2022

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 48120 2005 168 83.80 82.70 82.60 0.10 1278.50 1279.14 959.23 319.91 15.61 10782 1564.95
2 40650 1694 176 85.70 70.50 70.40 0.10 1278.50 1278.51 958.79 319.72 15.60 10776 1565.46
3 34019 1417 169 83.40 58.30 58.20 0.10 1278.90 1278.63 957.06 321.57 10.30 7194 1565.78
4 43323 1805 167 104.90 74.00 73.90 0.10 1279.30 1279.11 958.50 320.61 15.60 10776 1566.31
5 51642 2152 170 110.00 88.70 88.60 0.10 1279.60 1279.34 960.03 319.31 9.85 6869 1566.61
6 64878 2703 172 113.60 111.70 111.60 0.10 1279.50 1279.63 961.71 317.92 7.58 5254 1566.56
7 60063 2503 172 110.20 103.00 102.90 0.10 1279.40 1279.46 961.02 318.44 7.54 5221 1566.58
8 55560 2315 170 111.00 95.40 95.30 0.10 1279.70 1279.69 960.63 319.06 7.54 5247 1566.40
9 48133 2006 171 109.30 82.10 82.00 0.10 1280.10 1279.90 959.43 320.47 10.09 7143 1566.59
10 43554 1815 181 97.00 74.20 74.10 0.10 1280.40 1280.42 958.64 321.78 10.45 7351 1566.82
11 36230 1510 179 83.50 61.40 61.30 0.10 1280.70 1280.54 957.60 322.94 12.85 8806 1567.18
12 49306 2054 190 76.60 82.10 82.00 0.10 1280.30 1280.58 958.64 321.94 7.60 4944 1567.47
13 35250 1469 188 71.20 59.00 58.90 0.10 1280.40 1280.40 956.88 323.52 7.60 4944 1567.27
14 39962 1665 188 77.20 67.30 67.20 0.10 1280.50 1280.59 957.61 322.98 7.60 4945 1567.26
15 34554 1440 152 70.10 57.90 57.80 0.10 1280.60 1280.57 957.67 322.90 7.60 4944 1567.35
16 35459 1477 146 75.90 59.00 58.90 0.10 1280.90 1280.73 956.99 323.74 7.60 4947 1567.52
17 34430 1435 164 75.30 58.40 58.30 0.10 1281.10 1280.95 957.32 323.63 7.60 4944 1567.60
18 33414 1392 179 70.00 58.50 58.40 0.10 1281.20 1281.19 957.13 324.06 7.60 4944 1567.77
19 37085 1545 157 77.90 64.80 64.70 0.10 1281.30 1281.28 957.45 323.83 7.60 4944 1567.91
20 32980 1374 160 76.50 56.30 56.20 0.10 1281.80 1281.56 956.97 324.59 1.98 1281 1567.80
21 33932 1414 152 79.10 58.10 58.00 0.10 1282.30 1282.03 957.04 324.99 1.85 1191 1567.57
22 32382 1349 158 75.20 54.70 54.60 0.10 1282.80 1282.53 957.21 325.32 2.23 1434 1567.33
23 39252 1636 152 79.60 65.90 65.80 0.10 1283.10 1282.94 957.88 325.06 1.91 1227 1567.14
24 39397 1642 145 77.50 65.80 65.70 0.10 1283.20 1283.12 958.22 324.90 7.70 4950 1567.23
25 43120 1797 155 72.30 72.80 72.70 0.10 1283.00 1283.08 958.64 324.44 7.70 4950 1567.46
26 47402 1975 168 72.10 80.40 80.30 0.10 1282.70 1282.85 959.31 323.54 2.55 1639 1567.33
27 45035 1876 171 78.40 76.70 76.60 0.10 1282.70 1282.72 959.01 323.71 2.55 1639 1567.16
28 38072 1586 164 72.30 64.10 64.00 0.10 1282.80 1282.68 957.15 325.53 2.52 1622 1566.91
29 75.90 57.70 57.60 0.10 1283.20 1282.97 955.59 327.38 1566.74
30 66.40 70.90 70.80 0.10 1283.00 1283.03 957.31 325.72 1566.55
TOT1177204  4684           
AVG 42043 1752 167 83.73 71.08 70.98 0.10 1281.05 1281.01 958.22 322.78 7.67 5175 1566.95
MAX 64878   113.60 111.70 111.60 0.10 1283.20 1283.12 961.71 327.38 15.61 10782 1567.91
MIN 32382   66.40 54.70 54.60 0.10 1278.50 1278.51 955.59 317.92 1.85 1191 1564.95