US Army Corps of Engineers

Lower Monumental Dam

Friday May 15, 2026

New Date:

HourTotal Outflow kcfsGeneration Flow kcfsSpill kcfsForebay ElevationTailwater ElevationAverage HeadNav Lock Tailwater Elevation
1 114.60 12.20101.80 538.51 439.95 98.56 440.94
2 114.80 12.20102.00 538.50 439.97 98.53 440.95
3 102.90 12.10 90.10 538.33 439.53 98.80 440.36
4 99.70 12.20 86.90 538.31 439.58 98.73 440.61
5 99.40 12.20 86.60 537.59 439.56 98.03 440.37
6 82.80 12.20 70.00 537.93 438.98 98.95 439.56
7 80.10 12.20 67.30 537.93 439.06 98.87 439.71
8 79.90 12.20 67.10 537.84 439.10 98.74 439.69
9 80.00 12.20 67.20 537.81 439.10 98.71 439.75
10 80.10 12.30 67.20 537.84 439.09 98.75 439.76
11 80.10 12.20 67.30 537.83 439.10 98.73 439.56
12 80.20 12.20 67.30 537.82 439.10 98.72 439.71
13 80.20 12.30 67.30 537.70 439.11 98.59 439.69
14 85.30 12.30 72.40 538.08 439.51 98.57 440.48
15 97.10 12.20 84.30 538.09 439.54 98.55 440.49
16 97.00 12.20 84.20 538.11 439.57 98.54 440.43
17 97.00 12.30 84.00 538.03 439.56 98.47 440.42
18 97.10 12.30 84.20 538.12 439.55 98.57 440.32
19 97.00 12.20 84.10 538.06 439.56 98.50 440.55
20 96.90 12.20 84.10 538.04 439.57 98.47 440.51
21 96.90 12.10 84.10 538.03 439.61 98.42 440.70
22 96.90 12.20 84.20 538.06 439.58 98.48 440.62
23 97.10 12.30 84.30 538.00 439.59 98.41 440.53
24 97.10 12.20 84.30 538.04 439.63 98.41 440.75
AVG 92.92 12.22 80.10 538.03 439.44 98.59 440.27
MAX 114.80 12.30102.00 538.51 439.97 98.95 440.95
MIN 79.90 12.10 67.10 537.59 438.98 98.03 439.56
BUILDING STRONG®