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 95.40 117.90 117.90 0.00 1261.00 1261.38 962.37 299.01 1568.83
5 95.10 124.50 124.50 0.00 1260.20 1260.55 963.24 297.31 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 1256.60
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
TOT119063  424           
AVG 59532 2480 212 94.89 115.24 115.24 0.00 1259.91 1260.25 962.07 298.19 0.00 0 1568.95
MAX 63898   99.80 127.40 127.40 0.00 1262.70 1262.40 963.24 301.37 0.00 0 1569.26
MIN 55165   90.90 101.30 101.30 0.00 1256.60 1258.06 960.39 294.94 0.00 0 1568.68