US Army Corps of Engineers

Rocky Reach Dam & Lake

December 2025

Day of MonthTotal Generation MWhAverage Generation MWStation Use MWhInflow kcfsTotal Outflow kcfsGeneration Flow kcfsSpill kcfsMidnight Reservoir ElevationAverage Forebay ElevationAverage Tailwater ElevationAverage Head feet
1 15169 632 0 89.51 90.91 90.91 0.00 705.73 705.09 615.87 89.22
2 14867 619 0 86.25 88.25 88.25 0.00 705.26 705.44 615.45 89.99
3 14873 620 0 87.82 89.13 89.13 0.00 705.04 705.05 615.41 89.64
4 17157 715 0 105.43 103.43 103.43 0.00 705.17 705.69 616.45 89.24
5 20529 855 0 127.75 125.25 125.25 0.00 705.30 705.15 618.09 87.06
6 17778 741 0 104.27 106.47 106.47 0.00 705.16 705.63 616.78 88.85
7 16175 674 0 96.96 96.46 96.46 0.00 705.47 705.10 616.28 88.82
8 17218 717 0 103.29 103.59 103.59 0.00 705.28 704.98 616.60 88.38
9 13612 567 0 77.15 80.48 80.48 0.00 704.97 705.46 615.23 90.23
10 11831 493 0 71.23 69.90 69.90 0.00 705.41 705.09 614.87 90.22
11 11528 480 0 65.91 68.11 68.11 0.00 704.97 705.40 615.09 90.31
12 12517 522 0 78.99 74.19 74.19 0.00 705.92 705.23 615.42 89.81
13 15234 635 0 89.79 91.39 91.39 0.00 705.31 705.50 616.39 89.11
14 16291 679 0 100.18 99.18 99.18 0.00 705.42 705.27 616.84 88.43
15 16451 685 0 103.55 98.65 98.65 0.00 706.53 705.34 616.42 88.92
16 18684 778 0 112.99 112.59 112.59 0.00 706.34 705.77 617.62 88.15
17 20512 855 0 126.46 125.36 124.92 0.44 706.31 705.96 618.63 87.33
18 22268 928 0 135.39 137.65 137.65 0.00 705.54 705.51 619.33 86.18
19 15915 663 0 94.51 95.25 95.25 0.00 706.22 705.27 616.30 88.97
20 20372 849 0 126.45 124.35 124.35 0.00 706.06 705.51 618.23 87.28
21 21181 883 0 130.73 131.77 131.77 0.00 705.66 705.33 618.79 86.54
22 22985 958 0 139.82 145.22 145.22 0.00 704.18 705.16 619.64 85.52
23 21558 898 0 137.13 134.20 134.20 0.00 705.09 704.85 618.77 86.08
24 22353 931 0 140.42 136.14 136.14 0.00 705.98 706.18 618.64 87.54
25 20343 848 0 119.42 122.98 122.98 0.00 705.48 705.50 617.34 88.16
26 21666 903 0 130.20 131.22 131.22 0.00 705.07 705.40 618.08 87.32
27 21304 888 0 134.37 130.37 130.37 0.00 706.01 705.52 618.46 87.06
28 20481 853 0 123.41 124.89 124.89 0.00 705.76 705.96 618.07 87.89
29 23523 980 0 144.88 144.68 144.68 0.00 705.37 706.06 619.42 86.64
30 21772 907 0 134.37 136.14 136.14 0.00 705.24 705.40 618.97 86.43
31 20228 843 0 123.92 125.45 125.45 0.00 705.09 705.10 618.01 87.09
TOT566375  0        
AVG 18270 761 0 111.05 111.09 111.07 0.01 705.49 705.42 617.27 88.14
MAX 23523   144.88 145.22 145.22 0.44 706.53 706.18 619.64 90.31
MIN 11528   65.91 68.11 68.11 0.00 704.18 704.85 614.87 85.52
BUILDING STRONG®