US Army Corps of Engineers

Lower Monumental Dam

Sunday September 13, 2026

New Date:

HourTotal Outflow kcfsGeneration Flow kcfsSpill kcfsForebay ElevationTailwater ElevationAverage HeadNav Lock Tailwater Elevation
1 16.00 12.90 1.00 538.05 438.58 99.47 438.57
2 13.20 12.60 0.00 538.12 438.70 99.42 438.77
3 13.20 12.60 0.00 538.19 438.60 99.59 438.58
4 13.30 12.70 0.00 538.11 438.53 99.58 438.53
5 14.40 12.90 1.00 538.11 438.44 99.67 439.12
6 21.00 12.80 7.60 538.09 438.09 100.00 438.62
7 21.60 13.20 7.70 538.25 438.06 100.19 438.49
8 21.40 13.20 7.60 538.07 438.25 99.82 438.77
9 21.50 13.20 7.70 538.23 438.17 100.06 438.71
10 21.60 13.30 7.70 538.14 438.15 99.99 438.67
11 21.50 13.20 7.70 538.24 438.17 100.07 438.78
12 21.50 13.20 7.70 538.16 438.13 100.03 438.66
13 21.50 13.20 7.70 538.21 438.16 100.05 438.71
14 21.60 13.20 7.80 538.23 438.18 100.05 438.69
15 21.50 13.20 7.70 538.18 438.05 100.13 438.61
16 21.60 13.20 7.80 538.29 438.06 100.23 438.60
17 21.90 13.50 7.80 538.26 438.11 100.15 438.59
18 18.70 18.00 0.20 538.29 438.62 99.67
19
20
21
22
23
24
AVG 19.28 13.34 5.26 538.18 438.28 99.90 438.68
MAX 21.90 18.00 7.80 538.29 438.70 100.23 439.12
MIN 13.20 12.60 0.00 538.05 438.05 99.42 438.49
BUILDING STRONG®