US Army Corps of Engineers

Rock Island Dam

Wednesday May 20, 2026

New Date:

HourTotal Outflow kcfsGeneration Flow kcfsSpill kcfsForebay ElevationTailwater ElevationAverage Head
1 155.40 131.90 23.50 612.74 573.02 39.72
2 178.00 132.00 46.00 612.70 573.84 38.86
3 180.60 132.00 48.60 612.58 573.76 38.82
4 171.50 132.30 39.20 612.79 573.43 39.36
5 172.20 132.30 39.90 612.72 573.64 39.08
6 172.70 131.90 40.80 612.65 573.70 38.95
7 171.80 131.40 40.40 612.49 573.65 38.84
8 171.60 131.10 40.50 612.58 573.70 38.88
9 171.40 140.30 31.10 612.47 573.97 38.50
10 163.60 145.60 18.00 612.20 573.84 38.36
11 168.70 148.20 20.50 611.45 574.03 37.42
12 166.20 148.10 18.10 611.47 573.89 37.58
13 155.20 142.00 13.20 611.55 573.19 38.36
14 147.60 127.20 20.40 611.39 573.35 38.04
15 130.90 115.70 15.20 612.14 572.59 39.55
16 133.20 119.40 13.80 612.24 572.97 39.27
17 142.20 128.40 13.80 611.99 573.35 38.64
18 161.00 147.90 13.10 611.44 573.60 37.84
19 160.10 147.10 13.00 611.53 573.53 38.00
20 161.80 148.30 13.50 611.98 573.76 38.22
21 164.20 148.20 16.00 612.28 573.83 38.45
22 164.60 148.20 16.40 612.60 573.86 38.74
23 166.60 147.90 18.70 612.79 574.05 38.74
24 170.60 147.80 22.80 612.72 573.97 38.75
AVG 162.57 137.72 24.85 612.23 573.61 38.62
MAX 180.60 148.30 48.60 612.79 574.05 39.72
MIN 130.90 115.70 13.00 611.39 572.59 37.42
BUILDING STRONG®