US Army Corps of Engineers

Wanapum Dam

Friday July 31, 2026

New Date:

HourTotal Outflow kcfsGeneration Flow kcfsSpill kcfsForebay ElevationTailwater ElevationAverage Head
1 99.90 78.96 18.95 568.84 489.27 79.57
2 83.90 62.85 19.02 568.76 488.71 80.05
3 99.00 78.18 18.78 568.53 489.37 79.16
4 78.40 57.56 18.85 568.54 488.39 80.14
5 75.70 54.94 18.75 568.34 488.47 79.87
6 91.10 70.64 18.42 567.82 489.23 78.59
7 93.00 72.65 18.35 567.88 488.86 79.02
8 92.60 72.25 18.38 568.08 488.86 79.22
9 96.50 76.08 18.41 568.31 489.26 79.05
10 110.30 89.72 18.56 568.05 489.94 78.11
11 116.70 96.15 18.54 568.35 490.46 77.89
12 114.80 94.04 18.77 568.26 490.25 78.01
13 113.50 93.12 18.40 568.04 490.11 77.93
14 117.50 97.19 18.34 567.72 490.50 77.22
15 137.10 117.00 18.08 567.09 491.49 75.60
16 133.80 114.04 17.73 567.31 491.09 76.22
17 128.90 108.89 18.00 567.64 491.06 76.58
18 137.70 117.53 18.16 567.52 491.65 75.87
19 149.60 129.50 18.13 567.73 491.93 75.81
20 156.30 136.14 18.21 567.78 492.21 75.56
21 141.20 120.92 18.29 567.87 491.32 76.55
22 115.00 94.56 18.44 568.20 490.12 78.08
23 136.40 115.86 18.56 568.40 491.17 77.24
24 131.70 110.95 18.74 568.63 491.03 77.60
AVG 114.61 94.16 18.45 568.07 490.20 77.87
MAX 156.30 136.14 19.02 568.84 492.21 80.14
MIN 75.70 54.94 17.73 567.09 488.39 75.56