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Hydrograph River at a Glance Download Inundation
Mapping
Illinois River at Ottawa Stage (ft)Observed: 459.4 ft at 8:30PM May 17, 2022Observed: 459.41 ft at 8:45PM May 17, 2022Observed: 459.39 ft at 9:00PM May 17, 2022Observed: 459.36 ft at 9:15PM May 17, 2022Observed: 459.33 ft at 9:30PM May 17, 2022Observed: 459.3 ft at 9:45PM May 17, 2022Observed: 459.28 ft at 10:00PM May 17, 2022Observed: 459.26 ft at 10:15PM May 17, 2022Observed: 459.28 ft at 10:30PM May 17, 2022Observed: 459.22 ft at 10:45PM May 17, 2022Observed: 459.2 ft at 11:00PM May 17, 2022Observed: 459.19 ft at 11:15PM May 17, 2022Observed: 459.17 ft at 11:30PM May 17, 2022Observed: 459.15 ft at 11:45PM May 17, 2022Observed: 459.16 ft at 12:00AM May 18, 2022Observed: 459.16 ft at 12:15AM May 18, 2022Observed: 459.16 ft at 12:30AM May 18, 2022Observed: 459.17 ft at 12:45AM May 18, 2022Observed: 459.18 ft at 1:00AM May 18, 2022Observed: 459.18 ft at 1:15AM May 18, 2022Observed: 459.18 ft at 1:30AM May 18, 2022Observed: 459.18 ft at 1:45AM May 18, 2022Observed: 459.18 ft at 2:00AM May 18, 2022Observed: 459.18 ft at 2:15AM May 18, 2022Observed: 459.17 ft at 2:30AM May 18, 2022Observed: 459.17 ft at 2:45AM May 18, 2022Observed: 459.17 ft at 3:00AM May 18, 2022Observed: 459.18 ft at 3:15AM May 18, 2022Observed: 459.17 ft at 3:30AM May 18, 2022Observed: 459.17 ft at 3:45AM May 18, 2022Observed: 459.17 ft at 4:00AM May 18, 2022Observed: 459.18 ft at 4:15AM May 18, 2022Observed: 459.2 ft at 4:30AM May 18, 2022Observed: 459.29 ft at 4:45AM May 18, 2022Observed: 459.28 ft at 5:00AM May 18, 2022Observed: 459.26 ft at 5:15AM May 18, 2022Observed: 459.26 ft at 5:30AM May 18, 2022Observed: 459.29 ft at 5:45AM May 18, 2022Observed: 459.33 ft at 6:00AM May 18, 2022Observed: 459.35 ft at 6:15AM May 18, 2022Observed: 459.35 ft at 6:30AM May 18, 2022Observed: 459.36 ft at 6:45AM May 18, 2022Observed: 459.38 ft at 7:00AM May 18, 2022Observed: 459.38 ft at 7:15AM May 18, 2022Observed: 459.4 ft at 7:30AM May 18, 2022Observed: 459.42 ft at 7:45AM May 18, 2022Observed: 459.44 ft at 8:00AM May 18, 2022Observed: 459.46 ft at 8:15AM May 18, 2022Observed: 459.48 ft at 8:30AM May 18, 2022Observed: 459.5 ft at 8:45AM May 18, 2022Observed: 459.51 ft at 9:00AM May 18, 2022Observed: 459.53 ft at 9:15AM May 18, 2022Observed: 459.63 ft at 9:30AM May 18, 2022Observed: 459.61 ft at 9:45AM May 18, 2022Observed: 459.6 ft at 10:00AM May 18, 2022Observed: 459.61 ft at 10:15AM May 18, 2022Observed: 459.61 ft at 10:30AM May 18, 2022Observed: 459.62 ft at 10:45AM May 18, 2022Observed: 459.65 ft at 11:00AM May 18, 2022Observed: 459.65 ft at 11:15AM May 18, 2022Observed: 459.66 ft at 11:30AM May 18, 2022Observed: 459.66 ft at 11:45AM May 18, 2022Observed: 459.66 ft at 12:00PM May 18, 2022Observed: 459.67 ft at 12:15PM May 18, 2022Observed: 459.68 ft at 12:30PM May 18, 2022Observed: 459.76 ft at 12:45PM May 18, 2022Observed: 459.66 ft at 1:00PM May 18, 2022Observed: 459.71 ft at 1:15PM May 18, 2022Observed: 459.7 ft at 1:30PM May 18, 2022Observed: 459.69 ft at 1:45PM May 18, 2022Observed: 459.71 ft at 2:00PM May 18, 2022Observed: 459.7 ft at 2:15PM May 18, 2022Observed: 459.66 ft at 2:30PM May 18, 2022Observed: 459.63 ft at 2:45PM May 18, 2022Observed: 459.55 ft at 3:00PM May 18, 2022Observed: 459.5 ft at 3:15PM May 18, 2022Observed: 459.52 ft at 3:30PM May 18, 2022Observed: 459.52 ft at 3:45PM May 18, 2022Observed: 459.46 ft at 4:00PM May 18, 2022Observed: 459.46 ft at 4:15PM May 18, 2022Observed: 459.45 ft at 4:30PM May 18, 2022Observed: 459.42 ft at 4:45PM May 18, 2022Observed: 459.34 ft at 5:00PM May 18, 2022Observed: 459.36 ft at 5:15PM May 18, 2022Observed: 459.38 ft at 5:30PM May 18, 2022Observed: 459.39 ft at 5:45PM May 18, 2022Observed: 459.39 ft at 6:00PM May 18, 2022Observed: 459.38 ft at 6:15PM May 18, 2022Observed: 459.39 ft at 6:30PM May 18, 2022Observed: 459.39 ft at 6:45PM May 18, 2022Observed: 459.38 ft at 7:00PM May 18, 2022Observed: 459.37 ft at 7:15PM May 18, 2022Observed: 459.38 ft at 7:30PM May 18, 2022Observed: 459.37 ft at 7:45PM May 18, 2022Observed: 459.37 ft at 8:00PM May 18, 2022Observed: 459.28 ft at 8:15PM May 18, 2022Observed: 459.31 ft at 8:30PM May 18, 2022Observed: 459.33 ft at 8:45PM May 18, 2022Observed: 459.41 ft at 9:00PM May 18, 2022Observed: 459.33 ft at 9:15PM May 18, 2022Observed: 459.31 ft at 9:30PM May 18, 2022Observed: 459.31 ft at 9:45PM May 18, 2022Observed: 459.29 ft at 10:00PM May 18, 2022Observed: 459.3 ft at 10:15PM May 18, 2022Observed: 459.3 ft at 10:30PM May 18, 2022Observed: 459.29 ft at 10:45PM May 18, 2022Observed: 459.27 ft at 11:00PM May 18, 2022Observed: 459.29 ft at 11:15PM May 18, 2022Observed: 459.23 ft at 11:30PM May 18, 2022Observed: 459.21 ft at 11:45PM May 18, 2022Observed: 459.18 ft at 12:00AM May 19, 2022Observed: 459.17 ft at 12:15AM May 19, 2022Observed: 459.2 ft at 12:30AM May 19, 2022Observed: 459.22 ft at 12:45AM May 19, 2022Observed: 459.23 ft at 1:00AM May 19, 2022Observed: 459.22 ft at 1:15AM May 19, 2022Observed: 459.23 ft at 1:30AM May 19, 2022Observed: 459.24 ft at 1:45AM May 19, 2022Observed: 459.25 ft at 2:00AM May 19, 2022Observed: 459.26 ft at 2:15AM May 19, 2022Observed: 459.25 ft at 2:30AM May 19, 2022Observed: 459.25 ft at 2:45AM May 19, 2022Observed: 459.26 ft at 3:00AM May 19, 2022Observed: 459.26 ft at 3:15AM May 19, 2022Observed: 459.26 ft at 3:30AM May 19, 2022Observed: 459.27 ft at 3:45AM May 19, 2022Observed: 459.27 ft at 4:00AM May 19, 2022Observed: 459.28 ft at 4:15AM May 19, 2022Observed: 459.28 ft at 4:30AM May 19, 2022Observed: 459.29 ft at 4:45AM May 19, 2022Observed: 459.29 ft at 5:00AM May 19, 2022Observed: 459.3 ft at 5:15AM May 19, 2022Observed: 459.29 ft at 5:30AM May 19, 2022Observed: 459.3 ft at 5:45AM May 19, 2022Observed: 459.3 ft at 6:00AM May 19, 2022Observed: 459.31 ft at 6:15AM May 19, 2022Observed: 459.33 ft at 6:30AM May 19, 2022Observed: 459.31 ft at 6:45AM May 19, 2022Observed: 459.33 ft at 7:00AM May 19, 2022Observed: 459.35 ft at 7:15AM May 19, 2022Observed: 459.43 ft at 7:30AM May 19, 2022Observed: 459.41 ft at 7:45AM May 19, 2022Observed: 459.4 ft at 8:00AM May 19, 2022Observed: 459.4 ft at 8:15AM May 19, 2022Observed: 459.4 ft at 8:30AM May 19, 2022Observed: 459.41 ft at 8:45AM May 19, 2022Observed: 459.43 ft at 9:00AM May 19, 2022Observed: 459.44 ft at 9:15AM May 19, 2022Observed: 459.45 ft at 9:30AM May 19, 2022Observed: 459.46 ft at 9:45AM May 19, 2022Observed: 459.47 ft at 10:00AM May 19, 2022Observed: 459.48 ft at 10:15AM May 19, 2022Observed: 459.48 ft at 10:30AM May 19, 2022Observed: 459.55 ft at 10:45AM May 19, 2022Observed: 459.55 ft at 11:00AM May 19, 2022Observed: 459.53 ft at 11:15AM May 19, 2022Observed: 459.53 ft at 11:30AM May 19, 2022Observed: 459.54 ft at 11:45AM May 19, 2022Observed: 459.55 ft at 12:00PM May 19, 2022Observed: 459.73 ft at 12:15PM May 19, 2022Observed: 459.64 ft at 12:30PM May 19, 2022Observed: 459.64 ft at 12:45PM May 19, 2022Observed: 459.62 ft at 1:00PM May 19, 2022Observed: 459.64 ft at 1:15PM May 19, 2022Observed: 459.65 ft at 1:30PM May 19, 2022Observed: 459.65 ft at 1:45PM May 19, 2022Observed: 459.63 ft at 2:00PM May 19, 2022Observed: 459.6 ft at 2:15PM May 19, 2022Observed: 459.59 ft at 2:30PM May 19, 2022Observed: 459.58 ft at 2:45PM May 19, 2022Observed: 459.59 ft at 3:00PM May 19, 2022Observed: 459.57 ft at 3:15PM May 19, 2022Observed: 459.57 ft at 3:30PM May 19, 2022Observed: 459.55 ft at 3:45PM May 19, 2022Observed: 459.53 ft at 4:00PM May 19, 2022Observed: 459.55 ft at 4:15PM May 19, 2022Observed: 459.54 ft at 4:30PM May 19, 2022Observed: 459.53 ft at 4:45PM May 19, 2022Observed: 459.53 ft at 5:00PM May 19, 2022Observed: 459.52 ft at 5:15PM May 19, 2022Observed: 459.5 ft at 5:30PM May 19, 2022Observed: 459.5 ft at 5:45PM May 19, 2022Observed: 459.49 ft at 6:00PM May 19, 2022Observed: 459.49 ft at 6:15PM May 19, 2022Observed: 459.48 ft at 6:30PM May 19, 2022Observed: 459.4 ft at 6:45PM May 19, 2022Observed: 459.49 ft at 7:00PM May 19, 2022Observed: 459.5 ft at 7:15PM May 19, 2022Observed: 459.51 ft at 7:30PM May 19, 2022Observed: 459.53 ft at 7:45PM May 19, 2022Observed: 459.54 ft at 8:00PM May 19, 2022Observed: 459.48 ft at 8:15PM May 19, 2022Observed: 459.48 ft at 8:30PM May 19, 2022Observed: 459.49 ft at 8:45PM May 19, 2022Observed: 459.49 ft at 9:00PM May 19, 2022Observed: 459.48 ft at 9:15PM May 19, 2022Observed: 459.5 ft at 9:30PM May 19, 2022Observed: 459.52 ft at 9:45PM May 19, 2022Observed: 459.51 ft at 10:00PM May 19, 2022Observed: 459.49 ft at 10:15PM May 19, 2022Observed: 459.46 ft at 10:30PM May 19, 2022Observed: 459.46 ft at 10:45PM May 19, 2022Observed: 459.46 ft at 11:00PM May 19, 2022Observed: 459.45 ft at 11:15PM May 19, 2022Observed: 459.44 ft at 11:30PM May 19, 2022Observed: 459.43 ft at 11:45PM May 19, 2022Observed: 459.42 ft at 12:00AM May 20, 2022Observed: 459.41 ft at 12:15AM May 20, 2022Observed: 459.4 ft at 12:30AM May 20, 2022Observed: 459.39 ft at 12:45AM May 20, 2022Observed: 459.4 ft at 1:00AM May 20, 2022Observed: 459.42 ft at 1:15AM May 20, 2022Observed: 459.37 ft at 1:30AM May 20, 2022Observed: 459.36 ft at 1:45AM May 20, 2022Observed: 459.34 ft at 2:00AM May 20, 2022Observed: 459.33 ft at 2:15AM May 20, 2022Observed: 459.31 ft at 2:30AM May 20, 2022Observed: 459.31 ft at 2:45AM May 20, 2022Observed: 459.3 ft at 3:00AM May 20, 2022Observed: 459.3 ft at 3:15AM May 20, 2022Observed: 459.3 ft at 3:30AM May 20, 2022Observed: 459.3 ft at 3:45AM May 20, 2022Observed: 459.29 ft at 4:00AM May 20, 2022Observed: 459.29 ft at 4:15AM May 20, 2022Observed: 459.28 ft at 4:30AM May 20, 2022Observed: 459.28 ft at 4:45AM May 20, 2022Observed: 459.27 ft at 5:00AM May 20, 2022Observed: 459.26 ft at 5:15AM May 20, 2022Observed: 459.26 ft at 5:30AM May 20, 2022Observed: 459.25 ft at 5:45AM May 20, 2022Observed: 459.25 ft at 6:00AM May 20, 2022Observed: 459.22 ft at 6:15AM May 20, 2022Observed: 459.2 ft at 6:30AM May 20, 2022Observed: 459.18 ft at 6:45AM May 20, 2022Observed: 459.15 ft at 7:00AM May 20, 2022Observed: 459.14 ft at 7:15AM May 20, 2022Observed: 459.12 ft at 7:30AM May 20, 2022Observed: 459.1 ft at 7:45AM May 20, 2022Observed: 459.1 ft at 8:00AM May 20, 2022Observed: 459.18 ft at 8:15AM May 20, 2022Observed: 459.16 ft at 8:30AM May 20, 2022Observed: 459.23 ft at 8:45AM May 20, 2022Observed: 459.16 ft at 9:00AM May 20, 2022Observed: 459.15 ft at 9:15AM May 20, 2022Observed: 459.16 ft at 9:30AM May 20, 2022Observed: 459.25 ft at 9:45AM May 20, 2022Observed: 459.25 ft at 10:00AM May 20, 2022Observed: 459.18 ft at 10:15AM May 20, 2022Observed: 459.2 ft at 10:30AM May 20, 2022Observed: 459.27 ft at 10:45AM May 20, 2022Observed: 459.27 ft at 11:00AM May 20, 2022Observed: 459.29 ft at 11:15AM May 20, 2022Observed: 459.28 ft at 11:30AM May 20, 2022Observed: 459.29 ft at 11:45AM May 20, 2022Observed: 459.39 ft at 12:00PM May 20, 2022Observed: 459.36 ft at 12:15PM May 20, 2022Observed: 459.34 ft at 12:30PM May 20, 2022Observed: 459.34 ft at 12:45PM May 20, 2022Observed: 459.35 ft at 1:00PM May 20, 2022Observed: 459.38 ft at 1:15PM May 20, 2022Observed: 459.49 ft at 1:30PM May 20, 2022Observed: 459.45 ft at 1:45PM May 20, 2022Observed: 459.47 ft at 2:00PM May 20, 2022Observed: 459.49 ft at 2:15PM May 20, 2022Observed: 459.47 ft at 2:30PM May 20, 2022Observed: 459.46 ft at 2:45PM May 20, 2022Observed: 459.47 ft at 3:00PM May 20, 2022Observed: 459.48 ft at 3:15PM May 20, 2022Observed: 459.57 ft at 3:30PM May 20, 2022Observed: 459.5 ft at 3:45PM May 20, 2022Observed: 459.49 ft at 4:00PM May 20, 2022Observed: 459.52 ft at 4:15PM May 20, 2022Observed: 459.51 ft at 4:30PM May 20, 2022Observed: 459.52 ft at 4:45PM May 20, 2022Observed: 459.53 ft at 5:00PM May 20, 2022Observed: 459.55 ft at 5:15PM May 20, 2022Observed: 459.56 ft at 5:30PM May 20, 2022Observed: 459.55 ft at 5:45PM May 20, 2022Observed: 459.57 ft at 6:00PM May 20, 2022Observed: 459.56 ft at 6:15PM May 20, 2022Observed: 459.56 ft at 6:30PM May 20, 2022Observed: 459.5 ft at 6:45PM May 20, 2022Observed: 459.53 ft at 7:00PM May 20, 2022Observed: 459.52 ft at 7:15PM May 20, 2022Observed: 459.61 ft at 7:30PM May 20, 2022Observed: 459.6 ft at 7:45PM May 20, 2022Observed: 459.59 ft at 8:00PM May 20, 2022Observed: 459.6 ft at 8:15PM May 20, 2022Observed: 459.59 ft at 8:30PM May 20, 2022Observed: 459.67 ft at 10:45PM May 20, 2022Observed: 459.68 ft at 11:00PM May 20, 2022Observed: 459.75 ft at 11:15PM May 20, 2022Observed: 459.75 ft at 11:30PM May 20, 2022Observed: 459.75 ft at 11:45PM May 20, 2022Observed: 459.76 ft at 12:00AM May 21, 2022Observed: 459.76 ft at 12:15AM May 21, 2022Observed: 459.76 ft at 12:30AM May 21, 2022Observed: 459.75 ft at 12:45AM May 21, 2022Observed: 459.83 ft at 1:00AM May 21, 2022Observed: 459.77 ft at 1:15AM May 21, 2022Observed: 459.78 ft at 1:30AM May 21, 2022Observed: 459.78 ft at 1:45AM May 21, 2022Observed: 459.79 ft at 2:00AM May 21, 2022Observed: 459.78 ft at 2:15AM May 21, 2022Highest Observation: 459.87 ft at 2:30AM May 21, 2022Observed: 459.73 ft at 2:45AM May 21, 2022Observed: 459.74 ft at 3:00AM May 21, 2022Observed: 459.72 ft at 3:15AM May 21, 2022Observed: 459.68 ft at 3:30AM May 21, 2022Observed: 459.66 ft at 3:45AM May 21, 2022Observed: 459.64 ft at 4:00AM May 21, 2022Observed: 459.62 ft at 4:15AM May 21, 2022Observed: 459.68 ft at 4:30AM May 21, 2022Observed: 459.62 ft at 4:45AM May 21, 2022Observed: 459.6 ft at 5:00AM May 21, 2022Observed: 459.59 ft at 5:15AM May 21, 2022Observed: 459.57 ft at 5:30AM May 21, 2022Observed: 459.54 ft at 5:45AM May 21, 2022Observed: 459.53 ft at 6:00AM May 21, 2022Observed: 459.51 ft at 6:15AM May 21, 2022Observed: 459.49 ft at 6:30AM May 21, 2022Observed: 459.48 ft at 6:45AM May 21, 2022Observed: 459.54 ft at 7:00AM May 21, 2022Observed: 459.45 ft at 7:15AM May 21, 2022Observed: 459.45 ft at 7:30AM May 21, 2022Observed: 459.48 ft at 7:45AM May 21, 2022Observed: 459.48 ft at 8:00AM May 21, 2022Observed: 459.48 ft at 8:15AM May 21, 2022Observed: 459.47 ft at 8:30AM May 21, 2022Observed: 459.56 ft at 8:45AM May 21, 2022Observed: 459.49 ft at 9:00AM May 21, 2022Observed: 459.48 ft at 9:15AM May 21, 2022Observed: 459.49 ft at 9:30AM May 21, 2022Observed: 459.52 ft at 9:45AM May 21, 2022Observed: 459.53 ft at 10:00AM May 21, 2022Observed: 459.51 ft at 10:15AM May 21, 2022Observed: 459.43 ft at 10:30AM May 21, 2022Observed: 459.4 ft at 10:45AM May 21, 2022Observed: 459.39 ft at 11:00AM May 21, 2022Observed: 459.41 ft at 11:15AM May 21, 2022Observed: 459.41 ft at 11:30AM May 21, 2022Observed: 459.4 ft at 11:45AM May 21, 2022Observed: 459.38 ft at 12:00PM May 21, 2022Observed: 459.37 ft at 12:15PM May 21, 2022Observed: 459.36 ft at 12:30PM May 21, 2022Observed: 459.22 ft at 12:45PM May 21, 2022Observed: 459.3 ft at 1:00PM May 21, 2022Observed: 459.3 ft at 1:15PM May 21, 2022Observed: 459.3 ft at 1:30PM May 21, 2022Observed: 459.28 ft at 1:45PM May 21, 2022Observed: 459.28 ft at 2:00PM May 21, 2022Observed: 459.27 ft at 2:15PM May 21, 2022Observed: 459.28 ft at 2:30PM May 21, 2022Observed: 459.23 ft at 2:45PM May 21, 2022Observed: 459.22 ft at 3:00PM May 21, 2022Observed: 459.2 ft at 3:15PM May 21, 2022Observed: 459.18 ft at 3:30PM May 21, 2022Observed: 459.19 ft at 3:45PM May 21, 2022Observed: 459.19 ft at 4:00PM May 21, 2022Observed: 459.31 ft at 4:15PM May 21, 2022Observed: 459.28 ft at 4:30PM May 21, 2022Observed: 459.26 ft at 4:45PM May 21, 2022Observed: 459.26 ft at 5:00PM May 21, 2022Observed: 459.27 ft at 5:15PM May 21, 2022Observed: 459.27 ft at 5:30PM May 21, 2022Observed: 459.36 ft at 5:45PM May 21, 2022Observed: 459.29 ft at 6:00PM May 21, 2022Observed: 459.31 ft at 6:15PM May 21, 2022Observed: 459.32 ft at 6:30PM May 21, 2022Observed: 459.32 ft at 6:45PM May 21, 2022Observed: 459.32 ft at 7:00PM May 21, 2022Observed: 459.32 ft at 7:15PM May 21, 2022Observed: 459.4 ft at 7:30PM May 21, 2022Observed: 459.38 ft at 7:45PM May 21, 2022Observed: 459.37 ft at 8:00PM May 21, 2022Observed: 459.37 ft at 8:15PM May 21, 2022Observed: 459.38 ft at 8:30PM May 21, 2022Observed: 459.38 ft at 8:45PM May 21, 2022Observed: 459.39 ft at 9:00PM May 21, 2022Observed: 459.49 ft at 9:15PM May 21, 2022Observed: 459.47 ft at 9:30PM May 21, 2022Observed: 459.45 ft at 9:45PM May 21, 2022Observed: 459.45 ft at 10:00PM May 21, 2022Observed: 459.46 ft at 10:15PM May 21, 2022Observed: 459.46 ft at 10:30PM May 21, 2022Observed: 459.47 ft at 10:45PM May 21, 2022Observed: 459.49 ft at 11:00PM May 21, 2022Observed: 459.5 ft at 11:15PM May 21, 2022Observed: 459.52 ft at 11:30PM May 21, 2022Observed: 459.52 ft at 11:45PM May 21, 2022Observed: 459.53 ft at 12:00AM May 22, 2022Observed: 459.54 ft at 12:15AM May 22, 2022Observed: 459.56 ft at 12:30AM May 22, 2022Observed: 459.57 ft at 12:45AM May 22, 2022Observed: 459.59 ft at 1:00AM May 22, 2022Observed: 459.69 ft at 1:15AM May 22, 2022Observed: 459.67 ft at 1:30AM May 22, 2022Observed: 459.67 ft at 1:45AM May 22, 2022Observed: 459.66 ft at 2:00AM May 22, 2022Observed: 459.66 ft at 2:15AM May 22, 2022Observed: 459.67 ft at 2:30AM May 22, 2022Observed: 459.69 ft at 2:45AM May 22, 2022Observed: 459.72 ft at 3:00AM May 22, 2022Observed: 459.8 ft at 3:15AM May 22, 2022Observed: 459.79 ft at 3:30AM May 22, 2022Observed: 459.85 ft at 3:45AM May 22, 2022Observed: 459.76 ft at 4:00AM May 22, 2022Observed: 459.76 ft at 4:15AM May 22, 2022Observed: 459.76 ft at 4:30AM May 22, 2022Observed: 459.77 ft at 4:45AM May 22, 2022Observed: 459.79 ft at 5:00AM May 22, 2022Observed: 459.73 ft at 5:15AM May 22, 2022Observed: 459.75 ft at 5:30AM May 22, 2022Observed: 459.75 ft at 5:45AM May 22, 2022Observed: 459.75 ft at 6:00AM May 22, 2022Observed: 459.74 ft at 6:15AM May 22, 2022Observed: 459.74 ft at 6:30AM May 22, 2022Observed: 459.75 ft at 6:45AM May 22, 2022Observed: 459.76 ft at 7:00AM May 22, 2022Observed: 459.78 ft at 7:15AM May 22, 2022Observed: 459.82 ft at 7:30AM May 22, 2022Observed: 459.82 ft at 7:45AM May 22, 2022Observed: 459.81 ft at 8:00AM May 22, 2022Observed: 459.81 ft at 8:15AM May 22, 2022Observed: 459.83 ft at 8:30AM May 22, 2022Observed: 459.83 ft at 8:45AM May 22, 2022Observed: 459.84 ft at 9:00AM May 22, 2022Observed: 459.84 ft at 9:15AM May 22, 2022Observed: 459.83 ft at 9:30AM May 22, 2022Observed: 459.81 ft at 9:45AM May 22, 2022Observed: 459.8 ft at 10:00AM May 22, 2022Observed: 459.78 ft at 10:15AM May 22, 2022Observed: 459.77 ft at 10:30AM May 22, 2022Observed: 459.76 ft at 10:45AM May 22, 2022Observed: 459.74 ft at 11:00AM May 22, 2022Observed: 459.73 ft at 11:15AM May 22, 2022Observed: 459.73 ft at 11:30AM May 22, 2022Observed: 459.72 ft at 11:45AM May 22, 2022Observed: 459.72 ft at 12:00PM May 22, 2022Observed: 459.55 ft at 12:15PM May 22, 2022Observed: 459.73 ft at 12:30PM May 22, 2022Observed: 459.63 ft at 12:45PM May 22, 2022Observed: 459.64 ft at 1:00PM May 22, 2022Observed: 459.62 ft at 1:15PM May 22, 2022Observed: 459.61 ft at 1:30PM May 22, 2022Observed: 459.62 ft at 1:45PM May 22, 2022Observed: 459.54 ft at 2:00PM May 22, 2022Observed: 459.53 ft at 2:15PM May 22, 2022Observed: 459.5 ft at 2:30PM May 22, 2022Observed: 459.48 ft at 2:45PM May 22, 2022Observed: 459.45 ft at 3:00PM May 22, 2022Observed: 459.47 ft at 3:15PM May 22, 2022Observed: 459.39 ft at 3:30PM May 22, 2022Observed: 459.39 ft at 3:45PM May 22, 2022Observed: 459.39 ft at 4:00PM May 22, 2022Observed: 459.36 ft at 4:15PM May 22, 2022Observed: 459.37 ft at 4:30PM May 22, 2022Observed: 459.4 ft at 4:45PM May 22, 2022Observed: 459.32 ft at 5:00PM May 22, 2022Observed: 459.34 ft at 5:15PM May 22, 2022Observed: 459.36 ft at 5:30PM May 22, 2022Observed: 459.36 ft at 5:45PM May 22, 2022Observed: 459.35 ft at 6:00PM May 22, 2022Observed: 459.42 ft at 6:15PM May 22, 2022Observed: 459.4 ft at 6:30PM May 22, 2022Observed: 459.27 ft at 6:45PM May 22, 2022Observed: 459.3 ft at 7:00PM May 22, 2022Observed: 459.32 ft at 7:15PM May 22, 2022Observed: 459.33 ft at 7:30PM May 22, 2022Observed: 459.43 ft at 7:45PM May 22, 2022Observed: 459.35 ft at 8:00PM May 22, 2022Observed: 459.35 ft at 8:15PM May 22, 2022Observed: 459.36 ft at 8:30PM May 22, 2022Observed: 459.35 ft at 8:45PM May 22, 2022Observed: 459.35 ft at 9:00PM May 22, 2022Observed: 459.38 ft at 9:15PM May 22, 2022Observed: 459.39 ft at 9:30PM May 22, 2022Observed: 459.38 ft at 9:45PM May 22, 2022Observed: 459.37 ft at 10:00PM May 22, 2022Observed: 459.35 ft at 10:15PM May 22, 2022Observed: 459.35 ft at 10:30PM May 22, 2022Observed: 459.35 ft at 10:45PM May 22, 2022Observed: 459.34 ft at 11:00PM May 22, 2022Observed: 459.33 ft at 11:15PM May 22, 2022Observed: 459.32 ft at 11:30PM May 22, 2022Observed: 459.31 ft at 11:45PM May 22, 2022Observed: 459.29 ft at 12:00AM May 23, 2022Observed: 459.27 ft at 12:15AM May 23, 2022Observed: 459.23 ft at 12:30AM May 23, 2022Observed: 459.24 ft at 12:45AM May 23, 2022Observed: 459.19 ft at 1:00AM May 23, 2022Observed: 459.19 ft at 1:15AM May 23, 2022Observed: 459.17 ft at 1:30AM May 23, 2022Observed: 459.15 ft at 1:45AM May 23, 2022Observed: 459.14 ft at 2:00AM May 23, 2022Observed: 459.12 ft at 2:15AM May 23, 2022Observed: 459.11 ft at 2:30AM May 23, 2022Observed: 459.09 ft at 2:45AM May 23, 2022Observed: 459.09 ft at 3:00AM May 23, 2022Observed: 459.11 ft at 3:15AM May 23, 2022Observed: 459.13 ft at 3:30AM May 23, 2022Observed: 459.15 ft at 3:45AM May 23, 2022Observed: 459.17 ft at 4:00AM May 23, 2022Observed: 459.18 ft at 4:15AM May 23, 2022Observed: 459.19 ft at 4:30AM May 23, 2022Observed: 459.2 ft at 4:45AM May 23, 2022Observed: 459.2 ft at 5:00AM May 23, 2022Observed: 459.21 ft at 5:15AM May 23, 2022Observed: 459.22 ft at 5:30AM May 23, 2022Observed: 459.25 ft at 5:45AM May 23, 2022Observed: 459.32 ft at 6:00AM May 23, 2022Observed: 459.34 ft at 6:15AM May 23, 2022Observed: 459.37 ft at 6:30AM May 23, 2022Observed: 459.39 ft at 6:45AM May 23, 2022Observed: 459.4 ft at 7:00AM May 23, 2022Observed: 459.42 ft at 7:15AM May 23, 2022Observed: 459.44 ft at 7:30AM May 23, 2022Observed: 459.46 ft at 7:45AM May 23, 2022Observed: 459.49 ft at 8:00AM May 23, 2022Observed: 459.52 ft at 8:15AM May 23, 2022Observed: 459.55 ft at 8:30AM May 23, 2022Observed: 459.58 ft at 8:45AM May 23, 2022Observed: 459.61 ft at 9:00AM May 23, 2022Observed: 459.64 ft at 9:15AM May 23, 2022Observed: 459.67 ft at 9:30AM May 23, 2022Observed: 459.7 ft at 9:45AM May 23, 2022Observed: 459.73 ft at 10:00AM May 23, 2022Observed: 459.76 ft at 10:15AM May 23, 2022Observed: 459.78 ft at 10:30AM May 23, 2022Observed: 459.77 ft at 10:45AM May 23, 2022Observed: 459.77 ft at 11:00AM May 23, 2022Observed: 459.77 ft at 11:15AM May 23, 2022Observed: 459.76 ft at 11:30AM May 23, 2022Observed: 459.76 ft at 11:45AM May 23, 2022Observed: 459.76 ft at 12:00PM May 23, 2022Observed: 459.78 ft at 12:15PM May 23, 2022Observed: 459.79 ft at 12:30PM May 23, 2022Observed: 459.79 ft at 12:45PM May 23, 2022Observed: 459.78 ft at 1:00PM May 23, 2022Observed: 459.77 ft at 1:15PM May 23, 2022Observed: 459.75 ft at 1:30PM May 23, 2022Observed: 459.75 ft at 1:45PM May 23, 2022Observed: 459.73 ft at 2:00PM May 23, 2022Observed: 459.71 ft at 2:15PM May 23, 2022Observed: 459.7 ft at 2:30PM May 23, 2022Observed: 459.68 ft at 2:45PM May 23, 2022Observed: 459.67 ft at 3:00PM May 23, 2022Observed: 459.66 ft at 3:15PM May 23, 2022Observed: 459.65 ft at 3:30PM May 23, 2022Observed: 459.64 ft at 3:45PM May 23, 2022Observed: 459.63 ft at 4:00PM May 23, 2022Observed: 459.62 ft at 4:15PM May 23, 2022Observed: 459.61 ft at 4:30PM May 23, 2022Observed: 459.62 ft at 4:45PM May 23, 2022Observed: 459.61 ft at 5:00PM May 23, 2022Observed: 459.6 ft at 5:15PM May 23, 2022Observed: 459.58 ft at 5:30PM May 23, 2022Observed: 459.59 ft at 5:45PM May 23, 2022Observed: 459.57 ft at 6:00PM May 23, 2022Observed: 459.54 ft at 6:15PM May 23, 2022Observed: 459.52 ft at 6:30PM May 23, 2022Observed: 459.51 ft at 6:45PM May 23, 2022Observed: 459.38 ft at 7:00PM May 23, 2022Observed: 459.45 ft at 7:15PM May 23, 2022Observed: 459.34 ft at 7:30PM May 23, 2022Observed: 459.33 ft at 7:45PM May 23, 2022Observed: 459.27 ft at 8:00PM May 23, 2022Observed: 459.25 ft at 8:15PM May 23, 2022Observed: 459.23 ft at 8:30PM May 23, 2022Observed: 459.2 ft at 8:45PM May 23, 2022Observed: 459.17 ft at 9:00PM May 23, 2022Observed: 459.13 ft at 9:15PM May 23, 2022Observed: 459.12 ft at 9:30PM May 23, 2022Observed: 459.12 ft at 9:45PM May 23, 2022Observed: 459.12 ft at 10:00PM May 23, 2022Observed: 459.1 ft at 10:15PM May 23, 2022Observed: 459.1 ft at 10:30PM May 23, 2022Observed: 459.1 ft at 10:45PM May 23, 2022Observed: 459.1 ft at 11:00PM May 23, 2022Observed: 459.09 ft at 11:15PM May 23, 2022Observed: 459.11 ft at 11:30PM May 23, 2022Observed: 459.13 ft at 11:45PM May 23, 2022Observed: 459.16 ft at 12:00AM May 24, 2022Observed: 459.19 ft at 12:15AM May 24, 2022Observed: 459.22 ft at 12:30AM May 24, 2022Observed: 459.24 ft at 12:45AM May 24, 2022Observed: 459.27 ft at 1:00AM May 24, 2022Observed: 459.28 ft at 1:15AM May 24, 2022Observed: 459.3 ft at 1:30AM May 24, 2022Observed: 459.32 ft at 1:45AM May 24, 2022Observed: 459.35 ft at 2:00AM May 24, 2022Observed: 459.37 ft at 2:15AM May 24, 2022Observed: 459.39 ft at 2:30AM May 24, 2022Observed: 459.41 ft at 2:45AM May 24, 2022Observed: 459.43 ft at 3:00AM May 24, 2022Observed: 459.52 ft at 3:15AM May 24, 2022Observed: 459.5 ft at 3:30AM May 24, 2022Observed: 459.5 ft at 3:45AM May 24, 2022Observed: 459.51 ft at 4:00AM May 24, 2022Observed: 459.52 ft at 4:15AM May 24, 2022Observed: 459.54 ft at 4:30AM May 24, 2022Observed: 459.57 ft at 4:45AM May 24, 2022Observed: 459.59 ft at 5:00AM May 24, 2022Observed: 459.59 ft at 5:15AM May 24, 2022Observed: 459.61 ft at 5:30AM May 24, 2022Observed: 459.63 ft at 5:45AM May 24, 2022Observed: 459.65 ft at 6:00AM May 24, 2022Observed: 459.67 ft at 6:15AM May 24, 2022Observed: 459.66 ft at 6:30AM May 24, 2022Observed: 459.65 ft at 6:45AM May 24, 2022Observed: 459.65 ft at 7:00AM May 24, 2022Observed: 459.58 ft at 7:15AM May 24, 2022Observed: 459.58 ft at 7:30AM May 24, 2022Observed: 459.57 ft at 7:45AM May 24, 2022Observed: 459.57 ft at 8:00AM May 24, 2022Observed: 459.57 ft at 8:15AM May 24, 2022Observed: 459.56 ft at 8:30AM May 24, 2022Observed: 459.58 ft at 8:45AM May 24, 2022Observed: 459.54 ft at 9:00AM May 24, 2022Observed: 459.53 ft at 9:15AM May 24, 2022Observed: 459.56 ft at 9:30AM May 24, 2022Observed: 459.5 ft at 9:45AM May 24, 2022Observed: 459.57 ft at 10:00AM May 24, 2022Observed: 459.55 ft at 10:15AM May 24, 2022Observed: 459.48 ft at 10:30AM May 24, 2022Observed: 459.48 ft at 10:45AM May 24, 2022Observed: 459.45 ft at 11:00AM May 24, 2022Observed: 459.37 ft at 11:15AM May 24, 2022Observed: 459.36 ft at 11:30AM May 24, 2022Observed: 459.34 ft at 11:45AM May 24, 2022Observed: 459.3 ft at 12:00PM May 24, 2022Observed: 459.31 ft at 12:15PM May 24, 2022Observed: 459.26 ft at 12:30PM May 24, 2022Observed: 459.25 ft at 12:45PM May 24, 2022Observed: 459.23 ft at 1:00PM May 24, 2022Observed: 459.21 ft at 1:15PM May 24, 2022Observed: 459.2 ft at 1:30PM May 24, 2022Observed: 459.27 ft at 1:45PM May 24, 2022Observed: 459.23 ft at 2:00PM May 24, 2022Observed: 459.21 ft at 2:15PM May 24, 2022Observed: 459.21 ft at 2:30PM May 24, 2022Observed: 459.22 ft at 2:45PM May 24, 2022Observed: 459.22 ft at 3:00PM May 24, 2022Observed: 459.23 ft at 3:15PM May 24, 2022Observed: 459.25 ft at 3:30PM May 24, 2022Observed: 459.26 ft at 3:45PM May 24, 2022Observed: 459.27 ft at 4:00PM May 24, 2022Observed: 459.29 ft at 4:15PM May 24, 2022Observed: 459.29 ft at 4:30PM May 24, 2022Observed: 459.3 ft at 4:45PM May 24, 2022Observed: 459.32 ft at 5:00PM May 24, 2022Observed: 459.4 ft at 5:15PM May 24, 2022Observed: 459.39 ft at 5:30PM May 24, 2022Observed: 459.4 ft at 5:45PM May 24, 2022Observed: 459.41 ft at 6:00PM May 24, 2022Observed: 459.4 ft at 6:15PM May 24, 2022Observed: 459.41 ft at 6:30PM May 24, 2022Observed: 459.42 ft at 6:45PM May 24, 2022Observed: 459.44 ft at 7:00PM May 24, 2022Observed: 459.44 ft at 7:15PM May 24, 2022Observed: 459.52 ft at 7:30PM May 24, 2022US Army Corps of EngineersOTWI2(plotting HGIRG) Graph Created (8:25PM May 24, 2022)ObservedLatest observed value: 459.52 ft at 7:30 PM CDT 24-May-2022. Flood Stage is 463 ft
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About this graph
Tabular Data (UTC)
Tabular Data (CDT)
XML Data
RSS Files
Datum: NGVD29
Metadata
NOTE: River forecasts for this location take into account past precipitation and the precipitation amounts expected approximately 24 hours into the future from the forecast issuance time.

NOTE: Forecasts for the Illinois River at Ottawa are issued as needed during times of high water, but are not routinely available.

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Upstream Gauge - at Marseilles Lock (tailwater) Upstream Gauge Downstream Gauge Downstream Gauge - at Starved Rock Lock (tailwater)
Flood Categories (in feet)
Major Flood Stage: 471
Moderate Flood Stage: 467
Flood Stage: 463
Action Stage: 461
Low Stage (in feet): 456.5

Historic Crests
(1) 473.72 ft on 04/19/2013
(2) 472.59 ft on 05/19/2020
(3) 472.21 ft on 09/16/2008
(4) 471.49 ft on 02/22/2018
(5) 470.83 ft on 05/02/2019
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 472.59 ft on 05/19/2020
(2) 470.83 ft on 05/02/2019
(3) 471.49 ft on 02/22/2018
(4) 463.65 ft on 10/16/2017
(5) 464.10 ft on 07/23/2017
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) 458.62 ft on 11/26/2018
(2) 458.65 ft on 01/22/2019
(3) 458.82 ft on 09/03/2017

For more information on your flood risk go to www.floodsmart.gov.
Zoom Level:16
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Gauge LocationGauge Map Marker
 Disclaimer
Latitude/Longitude Disclaimer: The gauge location shown in the above map is the approximate location based on the latitude/longitude coordinates provided to the NWS by the gauge owner.
Flood Impacts & Photos Collapse
If you notice any errors in the below information, please contact our Webmaster
476 Water reaches the top of the levee at Ottawa High School.
475.5 Backwater causes the Fox River to reach the top of the flood protection wall south of Main Street near Ottawa High School. Water inundates lower-level of residences at Heritage Harbor east of Ottawa.
474.5 Backwater causes the Fox River to reach the top of the levee at Ottawa High School.
474 Structures threatened at Shoreline Boat Club in Ottawa. Main Street at Fox River in Ottawa is threatened and may be closed, blocking the last primary evacuation route for east Ottawa. Water overtops the berm at Waste Water Treatment Plant.
472 West parking lot of St. Elizabeth Medical Center in Ottawa is inundated.
471.5 Water reaches top of levee at Ottawa Waste Water Treatment Plant. Backwater causes the Fox River to inundate the YMCA parking lot in Ottawa.
470 Shabbona Street near Ottawa High School is inundated. St. Elizabeth Medical Center property in Ottawa is threatened including the loading dock areas.
469 Backwater causes the Fox River to reach bankfull near the YMCA in Ottawa.
468 River Rescue structure threatened in Ottawa.
467 Green Street near Shoreline Boat Club in Ottawa is inundated, blocking a primary evacuation route for east Ottawa.
466.5 Low-lying sections of Fox River Park in Ottawa are inundated including Hudson Street River Walk. St. Clair Street is threatened in Ottawa.
465.5 Low-lying property near St. Elizabeth Medical Center is threatened. Marquette High School football threatened.
465 Harbor Walk in Heritage Harbor east of Ottawa is inundated.
464 Backwater causes the Fox River to reach bankfull near St. Elizabeth Medical Center in Ottawa.
462.5 Roadway entrance to Allen Park threatened in Ottawa. Allen Park west boat ramp inundated in Ottawa.
461 River Rescue boat dock inundated in Ottawa.
Photos
(1) Gage equipment located on top of levee near mouth of Fox River.
(2) Levee at Ottawa High School.
(3) Looking downstream from atop levee 9/3/2009. Gage height 459.80 ft.
(4) Looking upstream from atop levee 9/3/2009. Gage height 459.80 ft.
Low Water Impacts Collapse
If you notice any errors in the below information, please contact our Webmaster
456.5 Low water levels begin to impact shipping interests along the river.
About This Location Collapse

Latitude: 41.344444° N, Longitude: 88.839167° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft 463 ft Interpreting hydrographs and NWS watch, warnings, and forecasts, and inundation maps
Vertical Datum Elevation
(gauge height = 0)		 Elevation
(gauge height = flood stage)		 Elevation information source
NAVD88 Not Available Not Available Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps
NGVD 29 Not Available 463 Older USGS topographic maps, NGVD29 benchmarks
MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks
Other Not Available Not Available  

Current/Historical Observations:
Additional Information Collapse
How much forecast precipitation was used for the current river forecast?
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The National Weather Service prepares its forecasts and other services in collaboration with agencies like the US Geological Survey, US Bureau of Reclamation, US Army Corps of Engineers, Natural Resource Conservation Service, National Park Service, ALERT Users Group, Bureau of Indian Affairs, and many state and local emergency managers across the country. For details, please click here.
NWS Information
National Weather Service
Chicago Weather Forecast Office
333 W. University Dr.
Romeoville, IL 60446
(815) 834-1435
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