US Army Corps of Engineers

Lower Monumental Dam

Sunday May 31, 2026

New Date:

HourTotal Outflow kcfsGeneration Flow kcfsSpill kcfsForebay ElevationTailwater ElevationAverage HeadNav Lock Tailwater Elevation
1 68.30 12.20 54.00 537.99 438.89 99.10 439.38
2 68.10 12.20 53.90 537.96 439.04 98.92 439.35
3 66.80 12.20 54.10 537.97 438.92 99.05 439.44
4 66.50 12.10 53.70 537.98 438.78 99.20 439.16
5 64.80 12.20 52.00 537.67 438.84 98.83 439.34
6 64.60 12.20 51.90 537.92 438.84 99.08 439.28
7 66.30 12.20 52.00 537.91 438.86 99.05 439.33
8 64.80 12.20 52.00 537.90 438.89 99.01 439.09
9 64.70 12.10 52.00 537.91 438.84 99.07 439.22
10 64.70 12.20 51.90 537.91 438.82 99.09 439.09
11 62.80 12.10 50.10 537.97 438.73 99.24 439.06
12 62.80 12.10 50.00 537.97 438.73 99.24 439.04
13 62.90 12.10 50.20 538.15 438.73 99.42 439.13
14 62.50 12.20 49.70 538.12 438.71 99.41 439.09
15 62.70 12.10 50.00 538.16 438.71 99.45 439.12
16 62.90 12.10 50.20 538.21 438.67 99.54 439.04
17 63.10 12.10 50.40 538.25 438.68 99.57 438.99
18 63.10 12.10 50.40 538.27 438.66 99.61 439.02
19 62.70 12.10 50.00 538.29 438.64 99.65 438.77
20 62.70 12.10 50.00 538.33 438.62 99.71 438.86
21 62.70 12.10 50.00 538.36 438.62 99.74 438.95
22 62.60 12.20 49.90 538.41 438.69 99.72 438.98
23 64.20 12.10 50.00 538.43 438.58 99.85 438.77
24 62.70 12.10 50.00 538.49 438.55 99.94 438.81
AVG 64.17 12.14 51.18 538.11 438.75 99.35 439.10
MAX 68.30 12.20 54.10 538.49 439.04 99.94 439.44
MIN 62.50 12.10 49.70 537.67 438.55 98.83 438.77