US Army Corps of Engineers

Grand Coulee Dam

December 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 58091 2420 169 101.50 97.50 97.50 0.00 1283.70 1283.63 960.12 323.51 0.00 0 1568.35
2 63813 2659 169 124.10 109.10 109.10 0.00 1284.10 1283.97 961.56 322.41 0.00 0 1568.34
3 74188 3091 160 119.40 127.30 127.30 0.00 1283.90 1283.91 963.17 320.74 0.00 0 1568.27
4 67300 2804 164 114.70 114.30 114.30 0.00 1283.90 1283.81 961.77 322.04 0.00 0 1568.28
5 64469 2686 152 139.80 108.80 108.80 0.00 1284.60 1284.39 961.36 323.03 0.00 0 1568.26
6 69082 2878 148 136.60 121.10 121.10 0.00 1285.00 1284.89 962.35 322.54 0.00 0 1568.26
7 70599 2942 149 129.40 120.20 120.20 0.00 1285.30 1285.15 962.53 322.62 0.00 0 1568.26
8 82992 3458 154 123.20 140.00 140.00 0.00 1284.80 1285.04 964.58 320.46 0.00 0 1568.25
9 82384 3433 136 113.40 140.90 140.90 0.00 1284.20 1284.45 964.96 319.49 0.00 0 1568.21
10 82094 3421 133 132.00 138.80 138.80 0.00 1284.00 1284.10 964.09 320.01 0.00 0 1568.32
11 77872 3245 141 123.20 131.50 131.50 0.00 1283.80 1283.89 963.64 320.25 0.00 0 1568.25
12 75936 3164 135 142.70 128.00 128.00 0.00 1284.10 1283.97 963.50 320.47 0.00 0 1568.23
13 73997 3083 143 134.90 124.90 124.90 0.00 1284.40 1284.32 963.32 321.00 0.00 0 1568.27
14 68426 2851 138 141.80 116.10 116.10 0.00 1285.00 1284.76 962.32 322.44 0.14 107 1568.21
15 70699 2946 140 138.00 119.90 119.90 0.00 1285.50 1285.29 962.80 322.49 0.06 42 1568.22
16 82519 3438 141 135.60 140.80 140.80 0.00 1285.40 1285.40 964.19 321.21 0.00 0 1568.23
17 90797 3783 140 140.70 154.30 154.30 0.00 1285.00 1285.19 965.66 319.53 0.04 8 1568.22
18 87115 3630 144 132.30 148.00 148.00 0.00 1284.60 1284.78 965.34 319.44 0.00 0 1568.22
19 79315 3305 144 125.20 134.40 134.40 0.00 1284.40 1284.50 963.93 320.57 0.00 0 1568.20
20 82618 3442 140 125.60 141.10 141.10 0.00 1284.00 1284.11 964.93 319.18 0.04 26 1568.20
21 79671 3320 138 130.50 136.80 136.80 0.00 1283.80 1283.88 964.11 319.77 0.00 0 1568.21
22 68121 2838 136 125.80 115.20 115.20 0.00 1284.10 1283.99 962.00 321.99 0.00 0 1568.21
23 62026 2584 144 120.20 104.30 104.30 0.00 1284.50 1284.38 961.21 323.17 0.00 0 1568.21
24 69271 2886 141 124.00 116.30 116.30 0.00 1284.70 1284.68 962.17 322.51 0.00 0 1568.22
25 64651 2694 142 134.20 109.40 109.40 0.00 1285.30 1284.97 961.46 323.51 0.00 0 1568.01
26 81968 3415 141 145.90 138.30 138.30 0.00 1285.50 1285.44 964.34 321.10 0.00 0 1568.17
27 90667 3778 143 148.60 153.80 153.80 0.00 1285.40 1285.42 966.04 319.38 0.00 0 1568.15
28 87493 3646 142 146.60 148.20 148.20 0.00 1285.30 1285.31 965.48 319.83 0.00 0 1568.14
29 87045 3627 140 153.60 148.00 148.00 0.00 1285.50 1285.38 965.50 319.88 0.00 0 1568.14
30 83900 3496 138 152.60 142.60 142.60 0.00 1285.70 1285.61 964.59 321.02 0.00 0 1568.14
31 86929 3622 143 146.40 148.40 148.40 0.00 1285.70 1285.71 965.10 320.61 0.00 0 1568.14
TOT2366048  4488           
AVG 76324 3180 145 132.34 129.62 129.62 0.00 1284.68 1284.66 963.49 321.17 0.01 6 1568.22
MAX 90797   153.60 154.30 154.30 0.00 1285.70 1285.71 966.04 323.51 0.14 107 1568.35
MIN 58091   101.50 97.50 97.50 0.00 1283.70 1283.63 960.12 319.18 0.00 0 1568.01