US Army Corps of Engineers

Lower Monumental Dam

Monday April 13, 2026

New Date:

HourTotal Outflow kcfsGeneration Flow kcfsSpill kcfsForebay ElevationTailwater ElevationAverage HeadNav Lock Tailwater Elevation
1 72.70 12.40 59.70 538.25 439.01 99.24 439.54
2 74.10 12.30 61.20 538.39 438.95 99.44 439.50
3 74.10 12.30 61.20 538.35 438.97 99.38 439.46
4 74.00 12.20 61.20 538.40 438.98 99.42 439.47
5 74.00 12.20 61.20 538.36 438.99 99.37 439.33
6 74.10 12.30 61.20 538.38 439.02 99.36 439.57
7 74.20 12.30 61.30 538.40 439.01 99.39 439.51
8 74.10 12.30 61.30 538.38 439.01 99.37 439.55
9 74.20 12.30 61.30 538.41 439.04 99.37 439.65
10 74.50 12.50 61.30 538.40 439.04 99.36 439.66
11 74.60 12.50 61.50 538.41 439.05 99.36 439.59
12 74.20 12.20 61.40 538.43 439.02 99.41 439.54
13 71.10 12.40 58.10 538.44 439.03 99.41 439.60
14 71.00 12.40 58.00 538.39 439.03 99.36 439.52
15 71.20 12.40 58.10 538.41 439.03 99.38 439.46
16 71.00 12.30 58.10 538.41 439.02 99.39 439.48
17 71.10 12.30 58.20 538.40 439.06 99.34 439.57
18 71.00 12.40 58.10 538.40 439.03 99.37 439.56
19 70.90 12.40 58.00 538.44 439.01 99.43 439.54
20 70.90 12.20 58.10 538.45 438.98 99.47 439.52
21 71.00 12.30 58.10 538.46 438.96 99.50 439.29
22 70.70 12.20 57.90 538.45 438.94 99.51 439.33
23 70.60 12.20 57.80 538.46 438.93 99.53 439.37
24 70.60 12.20 57.70 538.44 438.89 99.55 439.46
AVG 72.50 12.31 59.58 538.40 439.00 99.40 439.51
MAX 74.60 12.50 61.50 538.46 439.06 99.55 439.66
MIN 70.60 12.20 57.70 538.25 438.89 99.24 439.29