US Army Corps of Engineers

Lower Monumental Dam

Sunday December 21, 2025

New Date:

HourTotal Outflow kcfsGeneration Flow kcfsSpill kcfsForebay ElevationTailwater ElevationAverage HeadNav Lock Tailwater Elevation
1 40.30 39.70 0.00 538.68 439.19 99.49 439.02
2 40.40 39.80 0.00 538.90 439.30 99.60 439.23
3 40.20 39.60 0.00 538.84 439.13 99.71 438.93
4 40.90 40.30 0.00 538.97 439.28 99.69 439.21
5 41.10 40.50 0.00 538.97 439.26 99.71 439.09
6 41.20 40.60 0.00 538.97 439.26 99.71 439.14
7 41.30 40.70 0.00 539.07 439.26 99.81 439.16
8 40.60 40.00 0.00 539.03 439.19 99.84 439.04
9 40.50 40.10 0.00 539.12 439.27 99.85 439.16
10 40.50 40.10 0.00 539.11 439.23 99.88 439.11
11 40.60 40.20 0.00 539.20 439.22 99.98 439.11
12 40.80 40.40 0.00 539.21 439.26 99.95 439.11
13 40.20 39.80 0.00 539.26 439.22 100.04 439.07
14 40.50 40.10 0.00 539.29 439.23 100.06 439.11
15 40.60 40.20 0.00 539.31 439.24 100.07 439.12
16 41.60 41.20 0.00 539.26 439.40 99.86
17
18
19
20
21
22
23
24
AVG 40.71 40.21 0.00 539.07 439.25 99.83 439.11
MAX 41.60 41.20 0.00 539.31 439.40 100.07 439.23
MIN 40.20 39.60 0.00 538.68 439.13 99.49 438.93
BUILDING STRONG®