US Army Corps of Engineers

Lower Monumental Dam

Wednesday July 15, 2026

New Date:

HourTotal Outflow kcfsGeneration Flow kcfsSpill kcfsForebay ElevationTailwater ElevationAverage HeadNav Lock Tailwater Elevation
1 31.50 12.40 17.10 538.09 437.89 100.20
2 30.10 12.50 17.10 537.93 437.86 100.07
3 30.10 12.40 17.10 537.99 438.06 99.93
4 30.40 12.80 17.10 537.81 438.02 99.79 438.24
5 30.20 12.60 17.00 537.82 438.08 99.74 438.35
6 30.20 12.60 17.00 537.73 438.02 99.71 438.28
7 30.00 12.40 17.00 537.68 438.03 99.65 438.34
8 30.20 12.50 17.00 537.89 438.03 99.86 438.23
9 30.20 12.50 17.00 537.84 438.01 99.83 438.21
10 30.10 12.50 17.00 538.01 437.90 100.11 438.07
11 29.90 12.30 17.10 537.94 437.91 100.03 438.15
12 29.90 12.20 17.10 538.14 437.90 100.24 438.08
13 30.00 12.30 17.10 538.10 437.93 100.17 437.99
14 30.10 12.30 17.10 538.19 437.83 100.36 438.01
15 30.30 12.60 17.20 538.26 437.87 100.39 438.02
16 35.80 18.10 17.10 538.15 438.04 100.11 438.13
17 43.40 26.00 16.80 538.14 438.20 99.94 438.28
18 43.70 26.00 17.10 538.16 438.25 99.91 438.31
19 43.70 26.00 17.10 538.05 438.18 99.87 438.23
20 45.30 26.10 17.10 538.01 438.12 99.89 438.20
21 43.50 25.80 17.10 537.93 438.12 99.81
22 43.30 25.50 17.10 537.99 438.05 99.94
23 30.60 12.90 17.10 537.94 437.89 100.05
24 31.40 12.20 17.10 537.95 437.53 100.42
AVG 33.91 16.06 17.07 537.99 437.99 100.00 438.19
MAX 45.30 26.10 17.20 538.26 438.25 100.42 438.35
MIN 29.90 12.20 16.80 537.68 437.53 99.65 437.99