US Army Corps of Engineers

Wanapum Dam

Wednesday June 17, 2026

New Date:

HourTotal Outflow kcfsGeneration Flow kcfsSpill kcfsForebay ElevationTailwater ElevationAverage Head
1 149.30 117.33 30.01 571.06 492.49 78.57
2 163.60 131.75 29.86 570.76 493.37 77.39
3 160.10 135.89 22.20 570.80 492.59 78.20
4 153.70 131.38 20.28 570.67 492.59 78.08
5 149.90 127.69 20.18 570.51 492.41 78.10
6 156.20 134.11 20.10 570.47 492.69 77.78
7 152.00 129.90 20.09 570.43 492.42 78.01
8 146.90 124.88 20.03 570.27 492.13 78.14
9 154.20 132.27 19.89 570.13 492.60 77.53
10 162.20 140.38 19.77 569.90 492.85 77.05
11 162.50 140.85 19.62 569.66 492.92 76.74
12 164.00 142.57 19.40 569.35 492.94 76.40
13 157.10 135.90 19.21 568.96 492.63 76.32
14 154.00 133.20 18.82 568.24 492.39 75.84
15 150.20 129.77 18.43 567.83 492.43 75.40
16 154.10 133.85 18.22 567.62 492.33 75.29
17 140.00 119.92 18.04 567.28 491.55 75.73
18 140.30 120.50 17.84 567.06 491.92 75.13
19 155.00 135.37 17.62 566.79 492.29 74.50
20 159.10 139.61 17.50 566.55 492.39 74.16
21 150.50 131.13 17.35 566.44 491.90 74.54
22 148.90 129.63 17.29 566.47 491.80 74.67
23 153.00 133.62 17.39 566.52 492.07 74.45
24 142.50 123.09 17.41 566.59 491.34 75.25
AVG 153.30 131.44 19.86 568.76 492.38 76.39
MAX 164.00 142.57 30.01 571.06 493.37 78.57
MIN 140.00 117.33 17.29 566.44 491.34 74.16