US Army Corps of Engineers

Wanapum Dam

Saturday June 20, 2026

New Date:

HourTotal Outflow kcfsGeneration Flow kcfsSpill kcfsForebay ElevationTailwater ElevationAverage Head
1 137.30 116.53 18.77 568.63 491.45 77.17
2 131.90 110.97 18.90 568.71 491.37 77.34
3 146.80 125.92 18.86 568.67 491.99 76.68
4 134.90 114.04 18.84 568.60 491.45 77.15
5 126.70 105.93 18.80 568.57 490.76 77.82
6 126.20 105.39 18.78 568.57 491.28 77.29
7 131.30 110.51 18.83 568.67 491.03 77.64
8 112.30 91.44 18.82 568.61 490.18 78.43
9 112.70 91.90 18.77 568.49 490.51 77.98
10 124.40 103.70 18.71 568.43 491.04 77.39
11 121.40 100.74 18.63 568.21 490.70 77.51
12 117.70 97.22 18.49 568.05 490.35 77.70
13 117.90 97.49 18.36 567.79 490.47 77.32
14 116.80 96.63 18.20 567.62 490.39 77.23
15 130.00 109.94 18.03 567.38 490.97 76.41
16 128.70 108.82 17.91 567.16 490.95 76.21
17 134.80 115.11 17.73 566.92 491.09 75.83
18 131.70 112.08 17.62 566.90 491.05 75.86
19 145.50 125.89 17.56 566.62 492.16 74.46
20 167.70 148.28 17.39 566.50 492.69 73.81
21 159.50 140.26 17.27 566.23 492.37 73.86
22 156.30 137.21 17.07 565.92 492.37 73.55
23 152.60 133.71 16.90 565.73 492.19 73.54
24 131.60 112.84 16.78 565.54 490.93 74.61
AVG 133.20 113.02 18.17 567.60 491.24 76.37
MAX 167.70 148.28 18.90 568.71 492.69 78.43
MIN 112.30 91.44 16.78 565.54 490.18 73.54
BUILDING STRONG®