US Army Corps of Engineers

Rock Island Dam

Monday May 18, 2026

New Date:

HourTotal Outflow kcfsGeneration Flow kcfsSpill kcfsForebay ElevationTailwater ElevationAverage Head
1 131.50 110.30 21.20 611.81 570.96 40.85
2 127.50 106.40 21.10 611.85 570.94 40.91
3 109.80 89.50 20.30 612.15 570.70 41.45
4 137.40 121.90 15.50 611.83 571.81 40.02
5 145.00 131.20 13.80 612.22 572.41 39.81
6 160.00 146.10 13.90 612.46 572.40 40.06
7 170.50 149.40 21.10 612.66 573.05 39.61
8 170.50 149.20 21.30 612.47 572.83 39.64
9 158.70 149.00 9.70 611.99 572.75 39.24
10 145.70 131.70 14.00 612.43 572.80 39.63
11 157.40 114.70 42.70 612.67 572.89 39.78
12 173.10 114.90 58.20 612.48 573.00 39.48
13 159.30 114.90 44.40 612.48 572.67 39.81
14 151.50 114.50 37.00 612.58 572.64 39.94
15 180.10 115.00 65.10 612.22 573.67 38.55
16 170.70 115.00 55.70 612.48 573.05 39.43
17 170.40 115.00 55.40 612.38 572.99 39.39
18 168.90 115.00 53.90 612.35 573.13 39.22
19 167.00 115.50 51.50 612.52 573.26 39.26
20 167.00 115.00 52.00 612.77 573.18 39.59
21 174.30 115.00 59.30 612.68 573.37 39.31
22 174.60 115.10 59.50 612.71 573.53 39.18
23 174.40 115.10 59.30 612.57 573.49 39.08
24 174.20 115.20 59.00 612.54 573.53 39.01
AVG 159.15 120.61 38.54 612.39 572.71 39.68
MAX 180.10 149.40 65.10 612.77 573.67 41.45
MIN 109.80 89.50 9.70 611.81 570.70 38.55
BUILDING STRONG®