US Army Corps of Engineers

Lower Monumental Dam

Friday July 10, 2026

New Date:

HourTotal Outflow kcfsGeneration Flow kcfsSpill kcfsForebay ElevationTailwater ElevationAverage HeadNav Lock Tailwater Elevation
1 31.50 12.50 16.90 538.15 437.82 100.33 438.11
2 30.00 12.50 16.90 537.96 437.82 100.14 438.07
3 29.90 12.50 16.80 538.12 437.99 100.13 438.35
4 30.00 12.50 16.80 537.97 437.73 100.24 438.21
5 29.90 12.60 16.70 538.02 437.79 100.23
6 30.10 12.70 16.80 537.97 437.87 100.10
7 31.00 13.70 16.70 537.95 437.69 100.26
8 30.60 13.20 16.80 537.95 437.78 100.17 437.97
9 30.70 13.30 16.80 537.86 437.78 100.08 437.96
10 33.90 16.40 16.90 537.86 437.79 100.07 437.84
11 34.00 16.60 16.80 537.76 437.79 99.97 437.89
12 34.00 16.60 16.80 537.74 437.92 99.82 438.10
13 33.90 16.50 16.80 537.68 437.93 99.75 438.10
14 31.10 13.50 17.00 537.97 437.93 100.04
15 35.90 18.40 16.90 537.83 438.10 99.73 438.43
16 36.40 18.70 17.10 538.11 437.89 100.22 438.04
17 36.80 19.10 17.10 537.98 438.03 99.95 437.99
18 37.10 19.30 17.20 538.12 437.99 100.13
19 37.10 19.30 17.20 538.03 437.89 100.14
20 36.90 19.30 17.10 538.09 437.96 100.13
21 36.80 19.20 17.00 538.07 437.90 100.17
22 36.50 19.00 16.90 538.08 437.92 100.16 438.10
23 30.20 12.60 17.00 538.13 437.81 100.32 438.06
24 29.90 12.50 16.80 537.89 437.80 100.09 438.01
AVG 33.09 15.52 16.91 537.97 437.87 100.10 438.08
MAX 37.10 19.30 17.20 538.15 438.10 100.33 438.43
MIN 29.90 12.50 16.70 537.68 437.69 99.73 437.84