US Army Corps of Engineers

Lower Monumental Dam

Sunday May 17, 2026

New Date:

HourTotal Outflow kcfsGeneration Flow kcfsSpill kcfsForebay ElevationTailwater ElevationAverage HeadNav Lock Tailwater Elevation
1 84.50 12.20 70.20 538.25 439.24 99.01 439.98
2 83.00 12.30 70.10 538.29 439.20 99.09 440.08
3 83.10 12.30 70.30 538.31 439.28 99.03 439.82
4 83.10 12.20 70.30 538.33 439.19 99.14 439.87
5 82.80 12.20 70.10 537.90 439.13 98.77 439.72
6 77.10 12.20 64.30 538.19 439.04 99.15 439.59
7 76.70 12.10 64.00 538.17 438.98 99.19 439.65
8 76.50 12.20 63.70 538.10 438.97 99.13 439.45
9 76.60 12.20 63.70 538.13 438.93 99.20 439.40
10 78.00 12.20 63.70 538.13 438.98 99.15 439.56
11 76.60 12.20 63.80 538.14 438.94 99.20 439.48
12 76.60 12.20 63.80 538.11 438.97 99.14 439.59
13 76.60 12.20 63.80 538.18 438.97 99.21 439.55
14 76.70 12.20 64.00 538.16 438.91 99.25 439.64
15 76.90 12.30 64.00 538.23 438.89 99.34 439.43
16 76.90 12.30 64.10 538.18 438.93 99.25 439.68
17 76.90 12.20 64.20 538.25 438.94 99.31 439.51
18 76.90 12.20 64.10 538.24 438.96 99.28 439.54
19 76.90 12.30 64.00 538.30 438.93 99.37 439.51
20 76.90 12.30 64.00 538.28 438.97 99.31 439.60
21 76.70 12.20 63.90 538.31 438.97 99.34 439.59
22 76.70 12.20 63.80 538.31 438.97 99.34 439.52
23 76.60 12.20 63.80 538.30 438.96 99.34 439.52
24 76.70 12.20 63.90 538.31 438.96 99.35 439.54
AVG 78.17 12.22 65.23 538.21 439.01 99.20 439.62
MAX 84.50 12.30 70.30 538.33 439.28 99.37 440.08
MIN 76.50 12.10 63.70 537.90 438.89 98.77 439.40
BUILDING STRONG®