US Army Corps of Engineers

Lower Monumental Dam

Friday May 29, 2026

New Date:

HourTotal Outflow kcfsGeneration Flow kcfsSpill kcfsForebay ElevationTailwater ElevationAverage HeadNav Lock Tailwater Elevation
1 74.70 12.10 62.00 538.27 439.00 99.27 439.53
2 74.50 12.10 61.80 538.21 438.94 99.27 439.61
3 74.50 12.10 61.80 538.22 438.95 99.27 439.46
4 76.30 12.10 62.10 538.20 438.94 99.26 439.61
5 74.70 12.10 62.00 537.89 438.88 99.01 439.47
6 74.60 12.20 61.90 538.01 438.97 99.04 439.51
7 70.80 12.10 58.00 538.05 438.89 99.16 439.46
8 70.50 12.10 57.70 537.97 439.14 98.83 439.56
9 72.10 12.20 57.90 537.90 438.99 98.91 439.49
10 70.40 12.20 57.60 537.87 438.91 98.96 439.27
11 66.90 12.20 54.10 537.91 438.95 98.96 439.36
12 67.00 12.30 54.10 537.89 438.88 99.01 439.32
13 66.90 12.30 54.10 538.05 438.79 99.26 439.15
14 66.90 12.30 54.10 538.06 438.85 99.21 439.17
15 66.70 12.20 53.90 538.17 438.80 99.37 439.20
16 67.00 12.20 54.20 538.17 438.86 99.31 439.27
17 67.10 12.20 54.30 538.21 438.81 99.40 439.15
18 67.60 12.20 54.80 538.21 438.89 99.32 439.47
19 75.80 12.20 63.00 538.26 438.97 99.29 439.46
20 75.90 12.20 63.10 538.27 438.93 99.34 439.50
21 75.70 12.20 62.90 538.24 438.97 99.27 439.52
22 75.80 12.10 63.00 538.22 438.98 99.24 439.46
23 75.60 12.20 62.90 538.22 438.97 99.25 439.57
24 75.80 12.20 63.00 538.24 438.99 99.25 439.73
AVG 71.82 12.18 58.93 538.11 438.93 99.19 439.43
MAX 76.30 12.30 63.10 538.27 439.14 99.40 439.73
MIN 66.70 12.10 53.90 537.87 438.79 98.83 439.15
BUILDING STRONG®