US Army Corps of Engineers

Rock Island Dam & Reservoir

September 2021

Day of MonthTotal Generation MWhAverage Generation MWStation Use MWhInflow kcfsTotal Outflow kcfsGeneration Flow kcfsSpill kcfsMidnight Reservoir ElevationAverage Forebay ElevationAverage Tailwater ElevationAverage Head feet
1 6773 282 0 101.02 105.10 102.06 3.03 612.50 612.05 572.84 39.21
2 5439 227 0 75.53 76.73 76.73 0.00 611.51 611.82 570.61 41.21
3 5480 228 0 71.21 74.20 74.20 0.00 611.37 611.99 569.63 42.36
4 4495 187 0 59.63 61.80 61.80 0.00 611.08 611.72 568.77 42.95
5 3668 153 0 50.57 49.18 49.18 0.00 611.59 611.77 568.07 43.70
6 3819 159 0 52.02 52.30 52.30 0.00 611.86 611.74 568.80 42.94
7 5196 216 0 71.06 74.00 72.63 1.38 611.07 611.83 569.00 42.83
8 4180 174 0 54.50 54.18 54.18 0.00 611.33 611.72 567.48 44.24
9 3848 160 0 46.13 48.50 48.50 0.00 610.67 611.55 564.96 46.59
10 4341 181 0 56.52 53.02 53.02 0.00 612.03 612.13 564.58 47.55
11 4310 180 0 56.01 56.60 56.60 0.00 611.62 611.73 566.12 45.61
12 4317 180 0 54.62 56.09 55.63 0.46 611.07 612.03 566.62 45.41
13 3669 153 0 47.75 47.60 47.57 0.03 611.31 611.74 566.87 44.87
14 4110 171 0 52.89 51.65 51.65 0.00 612.16 612.15 566.14 46.01
15 4328 180 0 54.99 55.46 55.46 0.00 611.68 611.78 566.96 44.82
16 5536 231 0 70.98 72.98 72.90 0.09 611.11 611.90 568.07 43.83
17 4792 200 0 64.35 64.32 64.23 0.08 611.14 611.78 568.40 43.38
18 3487 145 0 45.95 46.14 46.14 0.00 610.91 611.60 567.86 43.74
19 3218 134 0 43.35 41.70 41.70 0.00 612.04 611.89 567.36 44.53
20 4496 187 0 56.77 58.56 58.56 0.00 611.44 611.73 567.88 43.85
21 66.77 65.06 65.06 0.00 611.11 612.02 568.47 43.55
22 64.51 67.22 67.22 0.00 610.94 611.84 569.34 42.50
23 72.12 72.98 72.98 0.00 611.46 611.83 570.37 41.46
24 70.24 68.20 72.33 0.00 610.91 611.74 569.48 42.26
25 56.69 56.65 56.65 0.00 610.84 611.72 568.51 43.21
26 52.86 52.64 52.64 0.00 611.37 611.74 568.14 43.60
27 63.61 64.25 60.73 3.52 611.41 612.02 567.30 44.72
28
29
30
TOT 89502  0        
AVG 4475 186 0 60.47 61.00 60.84 0.32 611.39 611.84 568.10 43.74
MAX 6773   101.02 105.10 102.06 3.52 612.50 612.15 572.84 47.55
MIN 3218   43.35 41.70 41.70 0.00 610.67 611.55 564.58 39.21