US Army Corps of Engineers

Rocky Reach Dam & Lake

January 2026

Day of MonthTotal Generation MWhAverage Generation MWStation Use MWhInflow kcfsTotal Outflow kcfsGeneration Flow kcfsSpill kcfsMidnight Reservoir ElevationAverage Forebay ElevationAverage Tailwater ElevationAverage Head feet
1 21605 900 0 137.58 132.40 132.40 0.00 706.06 705.67 618.64 87.03
2 22854 952 0 136.09 140.24 140.24 0.00 705.03 705.57 619.09 86.48
3 21834 910 0 134.67 133.12 133.12 0.00 705.52 705.64 618.62 87.02
4 19217 801 0 111.73 116.86 116.86 0.00 704.72 705.33 617.54 87.79
5 20074 836 0 125.95 123.60 123.60 0.00 705.07 705.43 617.99 87.44
6 23693 987 0 152.06 148.20 148.20 0.00 705.40 705.34 619.61 85.73
7 24603 1025 0 154.54 154.38 154.38 0.00 705.30 705.63 619.95 85.68
8 24213 1009 0 150.61 151.35 151.35 0.00 705.18 705.61 619.79 85.82
9 22802 950 0 138.85 141.65 141.65 0.00 704.81 704.90 619.03 85.87
10 22930 955 0 143.15 141.78 141.78 0.00 705.13 705.35 619.10 86.25
11 23148 964 0 143.51 144.17 144.17 0.00 704.93 705.35 619.21 86.14
12 23591 983 0 148.61 148.62 148.62 0.00 704.77 704.98 619.57 85.41
13 23511 980 0 146.92 148.18 148.18 0.00 704.47 704.74 619.35 85.39
14 22476 936 0 145.19 140.24 140.24 0.00 705.80 704.98 619.21 85.77
15 24457 1019 0 157.20 153.09 153.09 0.00 706.29 705.97 620.08 85.89
16 24776 1032 0 151.14 155.53 155.53 0.00 705.36 705.83 620.19 85.64
17 24271 1011 0 152.29 151.35 151.35 0.00 705.67 705.62 619.63 85.99
18 24539 1022 0 152.80 153.90 153.90 0.00 705.36 705.82 620.13 85.69
19 24462 1019 0 153.70 154.54 154.54 0.00 705.16 705.39 620.07 85.32
20 23838 993 0 148.36 148.53 148.53 0.00 705.31 705.62 619.56 86.06
21 151.05 151.22 151.22 0.00 705.24 705.70 619.81 85.89
22 138.96 138.85 138.85 0.00 705.55 705.20 618.83 86.37
23 139.08 137.41 137.41 0.00 705.93 705.85 618.79 87.06
24 144.92 145.47 145.47 0.00 705.64 706.09 619.40 86.69
25 152.04 148.06 148.06 0.00 706.31 706.09 619.59 86.50
26 146.22 149.77 149.77 0.00 705.63 705.69 619.83 85.86
27 144.56 143.03 143.03 0.00 706.07 706.01 619.24 86.77
28
29
30
31
TOT462894  0        
AVG 23145 964 0 144.51 144.28 144.28 0.00 705.40 705.53 619.33 86.21
MAX 24776   157.20 155.53 155.53 0.00 706.31 706.09 620.19 87.79
MIN 19217   111.73 116.86 116.86 0.00 704.47 704.74 617.54 85.32
BUILDING STRONG®