US Army Corps of Engineers

Grand Coulee Dam

March 2026

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 1262.70
2 55165 2299 216 91.20 101.30 101.30 0.00 1262.40 1262.40 961.03 301.37 0.00 0 1568.94
3 63898 2662 208 90.90 117.40 117.40 0.00 1261.70 1262.11 962.20 299.91 0.00 0 1568.89
4 65003 2708 198 95.40 117.90 117.90 0.00 1261.00 1261.38 962.37 299.01 0.07 48 1568.83
5 67633 2818 193 95.10 124.50 124.50 0.00 1260.20 1260.55 963.24 297.31 0.00 0 1568.76
6 93.50 125.10 125.10 0.00 1259.30 1259.66 963.23 296.43 1568.68
7 96.50 102.10 102.10 0.00 1259.00 1259.13 960.39 298.74 1569.00
8 96.70 106.20 106.20 0.00 1258.60 1258.75 960.98 297.77 1569.25
9 99.80 127.40 127.40 0.00 1257.60 1258.06 963.12 294.94 1569.26
10 92.00 125.50 125.50 0.00 1256.60 1257.02 963.14 293.88 1569.20
11 90.20 127.80 127.80 0.00 1255.50 1256.10 962.94 293.16 1569.36
12 1254.90
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
TOT251699  815           
AVG 62925 2622 204 94.13 117.52 117.52 0.00 1259.12 1259.52 962.26 297.25 0.02 12 1569.02
MAX 67633   99.80 127.80 127.80 0.00 1262.70 1262.40 963.24 301.37 0.07 48 1569.36
MIN 55165   90.20 101.30 101.30 0.00 1254.90 1256.10 960.39 293.16 0.00 0 1568.68