US Army Corps of Engineers

Lower Monumental Dam

Wednesday January 21, 2026

New Date:

HourTotal Outflow kcfsGeneration Flow kcfsSpill kcfsForebay ElevationTailwater ElevationAverage HeadNav Lock Tailwater Elevation
1 16.90 16.80 0.00 538.09 438.70 99.39 438.36
2 17.30 17.20 0.00 538.47 438.75 99.72 438.43
3 17.20 17.10 0.00 538.12 438.52 99.60 438.04
4 16.90 16.80 0.00 538.38 438.59 99.79 438.20
5 16.70 16.60 0.00 538.09 438.54 99.55 438.00
6 30.20 27.50 2.60 538.06 438.74 99.32 438.62
7 42.40 42.30 0.00 538.19 438.93 99.26 438.61
8 44.30 42.70 0.00 538.16 438.81 99.35 438.44
9 42.60 42.50 0.00 538.29 438.89 99.40 438.49
10 42.90 42.80 0.00 538.17 438.80 99.37 438.29
11 41.90 41.80 0.00 538.33 438.71 99.62 438.18
12 44.80 44.70 0.00 538.23 438.74 99.49 438.34
13 43.00 42.90 0.00 538.29 438.73 99.56
14 42.80 42.70 0.00 538.19 438.79 99.40 438.41
15 45.30 43.70 0.00 538.31 438.82 99.49 438.50
16 43.80 43.70 0.00 538.26 438.71 99.55 438.27
17 44.20 44.10 0.00 538.27 439.08 99.19 438.81
18 54.70 54.60 0.00 538.22 439.20 99.02 438.97
19 55.40 55.30 0.00 538.53 439.12 99.41 438.82
20 54.90 54.80 0.00 538.30 439.19 99.11 438.94
21 43.60 43.50 0.00 538.58 438.97 99.61 438.65
22 42.30 42.20 0.00 538.39 438.89 99.50 438.53
23 28.30 28.20 0.00 538.65 438.68 99.97 438.24
24 27.10 27.00 0.00 538.27 438.71 99.56 438.29
AVG 37.48 37.15 0.11 538.28 438.82 99.47 438.46
MAX 55.40 55.30 2.60 538.65 439.20 99.97 438.97
MIN 16.70 16.60 0.00 538.06 438.52 99.02 438.00
BUILDING STRONG®