US Army Corps of Engineers

Lower Granite Dam & Lake

March 2025

Day of MonthTotal Generation MWhAverage Generation MWStation Use MWhInflow kcfsTotal Outflow kcfsGeneration Flow kcfsSpill kcfsMidnight Reservoir ElevationAverage Forebay ElevationAverage Tailwater ElevationAverage Head feetMidnight Lewiston Gage ft
1 8055 336 45 46.60 47.00 45.20 1.70 736.89 737.05 637.23 99.82 737.19
2 8088 337 45 47.20 47.30 45.50 1.70 736.88 736.97 637.22 99.75 737.22
3 8337 347 45 49.00 48.60 46.80 1.70 736.95 737.19 637.23 99.96 737.21
4 8320 347 45 48.20 48.90 46.90 1.60 736.78 736.69 637.24 99.45 737.00
5 8466 353 46 47.70 49.70 47.80 1.70 736.28 736.38 637.17 99.21 736.38
6 7216 301 45 45.90 42.80 40.90 1.70 737.03 737.01 637.52 99.49 737.29
7 7723 322 45 45.70 45.30 43.50 1.60 737.12 736.78 637.10 99.68 737.25
8 7441 310 50 43.10 43.50 41.70 1.70 737.06 736.94 636.83 100.11 737.20
9 736.08 736.33
10 735.55 735.54
11 736.26 736.32
12 736.07 736.31
13 735.11 735.36
14 734.92 735.00
15 735.08 735.26
16 735.31 735.41
17 735.48 735.26
18 735.90 736.05
19 735.69 735.88
20 736.46 736.59
21 736.42 736.50
22 736.41 736.55
23 736.04 736.60
24 735.62 735.94
25 736.69 737.12
26 736.56 737.01
27 736.06 736.54
28 735.48 736.15
29 734.94 735.58
30 734.09 734.78
31 734.72 735.44
TOT 63645  366         
AVG 7956 331 46 46.67 46.64 44.79 1.67 736.00 736.88 637.19 99.68 736.27
MAX 8466   49.00 49.70 47.80 1.70 737.12 737.19 637.52 100.11 737.29
MIN 7216   43.10 42.80 40.90 1.60 734.09 736.38 636.83 99.21 734.78