US Army Corps of Engineers

Lower Granite Dam

Tuesday October 21, 2025

New Date:

HourTotal Outflow kcfsGeneration Flow kcfsSpill kcfsForebay ElevationTailwater ElevationAverage HeadLWSI Gage ElevationLWGW NavLock Elevation
1 13.30 12.90 0.00 736.61 636.81 99.80 736.75 637.19
2 13.50 13.10 0.00 736.64 636.85 99.79 736.76 637.09
3 13.30 12.90 0.00 736.66 636.68 99.98 736.79 637.03
4 13.40 13.00 0.00 736.68 636.90 99.78 736.84 637.28
5 14.60 13.10 1.10 736.68 636.63 100.05 736.86 637.53
6 23.00 13.10 9.60 736.63 636.01 100.62 736.87 637.22
7 22.90 13.00 9.50 736.61 636.13 100.48 736.72 637.33
8 22.70 12.80 9.50 736.53 636.26 100.27 736.61 637.47
9 22.60 12.90 9.30 736.46 636.15 100.31 736.63 637.02
10 13.40 13.00 0.10 736.53 636.57 99.96 736.54 637.08
11 13.60 13.20 0.00 736.49 637.05 99.44 736.59 637.43
12 15.30 13.20 0.00 736.43 636.68 99.75 736.73 637.21
13 13.40 13.00 0.00 736.56 636.69 99.87 736.69 637.20
14 13.50 13.10 0.00 736.57 637.17 99.40 736.66 637.56
15 13.50 13.10 0.00 736.56 636.89 99.67 736.77 637.23
16 13.50 13.10 0.00 736.62 636.85 99.77 736.81 637.22
17 13.70 13.30 0.00 736.68 637.26 99.42 736.77 637.60
18 15.30 13.20 0.00 736.66 637.06 99.60 736.86 637.05
19 17.80 17.40 0.00 736.65 637.05 99.60 736.90 637.38
20 17.80 17.40 0.00 736.71 636.67 100.04 736.81 637.05
21 17.70 17.30 0.00 736.67 636.50 100.17 736.81 636.84
22 17.60 17.20 0.00 736.67 636.67 100.00 736.86 636.97
23 13.60 13.20 0.00 736.75 636.35 100.40 736.81 636.75
24 13.40 13.00 0.00 736.81 636.26 100.55 736.84 636.73
AVG 15.93 13.77 1.63 736.62 636.67 99.95 736.76 637.19
MAX 23.00 17.40 9.60 736.81 637.26 100.62 736.90 637.60
MIN 13.30 12.80 0.00 736.43 636.01 99.40 736.54 636.73
BUILDING STRONG®