US Army Corps of Engineers

Lower Granite Dam

Thursday June 18, 2026

New Date:

HourTotal Outflow kcfsGeneration Flow kcfsSpill kcfsForebay ElevationTailwater ElevationAverage HeadLWSI Gage ElevationLWGW NavLock Elevation
1 34.80 12.20 22.20 735.89 633.63 102.26 736.32 634.92
2 34.70 12.10 22.10 735.89 633.69 102.20 736.32 634.98
3 34.80 12.20 22.30 735.91 633.73 102.18 736.32 635.02
4 35.30 12.20 22.70 735.90 634.05 101.85 736.36 634.85
5 37.40 12.30 24.80 735.93 634.04 101.89 736.37 634.83
6 37.50 12.30 24.70 735.92 634.05 101.87 736.33 634.80
7 37.30 12.20 24.70 735.92 633.94 101.98 736.34 634.91
8 37.30 12.20 24.70 735.90 633.85 102.05 736.36 634.78
9 37.30 12.10 24.70 735.93 633.87 102.06 736.35 634.75
10 37.30 12.30 24.70 735.93 634.08 101.85 736.36 635.01
11 37.40 12.30 24.70 735.92 634.08 101.84 736.36 634.95
12 37.50 12.30 24.80 735.91 634.00 101.91 736.36 634.99
13 37.50 12.20 24.80 735.90 634.26 101.64 736.37 635.14
14 37.50 12.20 24.80 735.91 634.16 101.75 736.38 635.00
15 37.60 12.30 24.80 735.92 634.10 101.82 736.36 635.02
16 37.50 12.30 24.80 735.90 634.17 101.73 736.35 635.09
17 37.40 12.30 24.70 735.89 634.15 101.74 736.34 635.02
18 37.40 12.30 24.70 735.89 634.28 101.61 736.31 635.08
19 37.40 12.40 24.70 735.84 634.17 101.67 736.28 635.08
20 37.40 12.30 24.60 735.83 634.12 101.71 736.27 634.99
21 37.40 12.30 24.70 735.80 634.22 101.58 736.23 635.04
22 36.80 12.30 24.00 735.79 633.96 101.83 736.20 635.01
23 34.00 12.40 21.20 735.78 634.01 101.77 736.18 635.09
24 34.10 12.60 21.10 735.78 634.11 101.67 736.21 635.17
AVG 36.69 12.28 24.00 735.88 634.03 101.85 736.32 634.98
MAX 37.60 12.60 24.80 735.93 634.28 102.26 736.38 635.17
MIN 34.00 12.10 21.10 735.78 633.63 101.58 736.18 634.75
BUILDING STRONG®