US Army Corps of Engineers

Rock Island Dam & Reservoir

September 2023

Day of MonthTotal Generation MWhAverage Generation MWStation Use MWhInflow kcfsTotal Outflow kcfsGeneration Flow kcfsSpill kcfsMidnight Reservoir ElevationAverage Forebay ElevationAverage Tailwater ElevationAverage Head feet
1 5079 212 0 68.55 71.29 70.85 0.44 611.39 611.50 569.77 41.73
2 4539 189 0 62.90 59.62 59.62 0.00 611.95 612.05 567.83 44.22
3 4424 184 0 59.80 60.45 60.45 0.00 612.21 612.08 568.94 43.14
4 4583 191 0 60.27 61.24 61.24 0.00 612.24 612.19 569.25 42.94
5 4762 198 0 62.57 65.99 64.87 1.12 611.68 612.08 570.10 41.98
6 3200 133 0 47.87 47.24 47.24 0.00 611.23 611.60 569.38 42.22
7 4018 167 0 52.42 53.15 53.01 0.14 611.26 612.16 568.86 43.30
8 4029 168 0 54.05 52.60 52.60 0.00 612.08 612.00 568.15 43.85
9 3920 163 0 48.86 50.32 50.32 0.00 611.45 611.74 568.29 43.45
10 3818 159 0 51.85 51.06 51.06 0.00 611.89 611.84 568.24 43.60
11 3410 142 0 44.89 45.39 45.19 0.20 611.02 611.45 568.57 42.88
12 3540 148 0 48.87 47.25 47.25 0.00 612.20 611.62 568.54 43.08
13 3751 156 0 48.14 48.67 48.67 0.00 612.12 611.99 567.63 44.36
14 3647 152 0 46.82 46.44 46.44 0.00 612.42 612.14 566.72 45.42
15 3149 131 0 38.14 38.97 38.88 0.10 611.78 612.06 565.79 46.27
16 3430 143 0 44.04 43.19 43.19 0.00 611.87 612.07 565.38 46.69
17 3574 149 0 46.92 47.02 47.02 0.00 611.84 612.10 567.20 44.90
18 3858 161 0 51.35 51.71 51.71 0.00 611.37 612.05 568.97 43.08
19 3614 151 0 46.84 46.14 46.14 0.00 611.42 611.98 567.41 44.57
20 3449 144 0 44.33 45.39 44.94 0.45 610.24 611.58 567.78 43.80
21 55.24 52.53 52.53 0.00 612.22 611.77 568.43 43.34
22 45.35 45.81 45.27 0.55 612.19 612.09 567.91 44.18
23 42.95 43.61 43.61 0.00 611.64 612.02 566.83 45.19
24 43.15 42.37 42.37 0.00 612.27 611.95 568.01 43.94
25 43.40 44.25 44.25 0.00 611.98 611.84 567.79 44.05
26 46.14 45.47 45.47 0.00 611.97 612.04 567.68 44.36
27
28
29
30
TOT 77794  0        
AVG 3890 162 0 50.22 50.28 50.16 0.12 611.77 611.92 568.06 43.87
MAX 5079   68.55 71.29 70.85 1.12 612.42 612.19 570.10 46.69
MIN 3149   38.14 38.97 38.88 0.00 610.24 611.45 565.38 41.73
BUILDING STRONG®