US Army Corps of Engineers

Lower Monumental Dam

Tuesday January 27, 2026

New Date:

HourTotal Outflow kcfsGeneration Flow kcfsSpill kcfsForebay ElevationTailwater ElevationAverage HeadNav Lock Tailwater Elevation
1 0.40 0.20 0.00 538.56 438.12 100.44 437.22
2 1.70 0.00 0.00 538.21 438.20 100.01 437.30
3 0.20 0.00 0.00 538.50 437.68 100.82 446.48
4 13.50 13.30 0.00 538.08 438.35 99.73
5 27.20 27.00 0.00 538.61 438.20 100.41 437.56
6 28.00 27.80 0.00 538.31 438.46 99.85 438.48
7 41.20 41.00 0.00 538.62 438.88 99.74 438.52
8 55.60 53.90 0.00 538.70 439.03 99.67 438.64
9 53.80 53.60 0.00 538.70 439.10 99.60 438.73
10 41.30 41.10 0.00 538.86 439.07 99.79 438.83
11 40.70 40.50 0.00 538.54 439.07 99.47 438.92
12 28.00 27.80 0.00 539.08 438.74 100.34 438.31
13 14.30 14.10 0.00 538.57 439.06 99.51 438.88
14 13.50 13.30 0.00 538.79 439.00 99.79 438.81
15 13.20 13.00 0.00 538.65 438.59 100.06 438.10
16 14.90 14.70 0.00 538.73 439.15 99.58 439.06
17 30.80 30.60 0.00 538.50 439.19 99.31 439.19
18 44.70 44.50 0.00 538.52 439.18 99.34 439.01
19 44.80 44.60 0.00 538.65 439.53 99.12 439.53
20 42.40 42.20 0.00 538.41 439.41 99.00 439.41
21 40.40 40.20 0.00 538.58 439.26 99.32 439.24
22 32.90 32.70 0.00 538.56 439.27 99.29 439.17
23 27.10 26.90 0.00 538.42 439.14 99.28 439.04
24 14.00 13.80 0.00 538.34 439.03 99.31 438.82
AVG 27.69 27.37 0.00 538.56 438.86 99.70 439.01
MAX 55.60 53.90 0.00 539.08 439.53 100.82 446.48
MIN 0.20 0.00 0.00 538.08 437.68 99.00 437.22
BUILDING STRONG®