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Hydrograph River at a Glance Download
Illinois River at Starved Rock Lock (tailwater) Tailwater (ft)Flow (kcfs)Observed: 449.51 ft at 4:30PM Mar 13, 2023Observed: 449.52 ft at 5:00PM Mar 13, 2023Observed: 449.47 ft at 5:30PM Mar 13, 2023Highest Observation: 449.53 ft at 6:00PM Mar 13, 2023Observed: 449.32 ft at 6:30PM Mar 13, 2023Observed: 449.27 ft at 7:00PM Mar 13, 2023Observed: 449.23 ft at 7:30PM Mar 13, 2023Observed: 449.17 ft at 8:00PM Mar 13, 2023Observed: 449.11 ft at 8:30PM Mar 13, 2023Observed: 449.15 ft at 9:00PM Mar 13, 2023Observed: 449.15 ft at 9:30PM Mar 13, 2023Observed: 449.11 ft at 10:00PM Mar 13, 2023Observed: 449.1 ft at 10:30PM Mar 13, 2023Observed: 449.11 ft at 11:00PM Mar 13, 2023Observed: 449.09 ft at 11:30PM Mar 13, 2023Observed: 449.06 ft at 12:00AM Mar 14, 2023Observed: 449.06 ft at 12:30AM Mar 14, 2023Observed: 449.04 ft at 1:00AM Mar 14, 2023Observed: 449.05 ft at 1:30AM Mar 14, 2023Observed: 449.06 ft at 2:00AM Mar 14, 2023Observed: 449.04 ft at 2:30AM Mar 14, 2023Observed: 449.02 ft at 3:00AM Mar 14, 2023Observed: 449 ft at 3:30AM Mar 14, 2023Observed: 449.1 ft at 4:00AM Mar 14, 2023Observed: 449.12 ft at 4:30AM Mar 14, 2023Observed: 449.12 ft at 5:00AM Mar 14, 2023Observed: 449.12 ft at 5:30AM Mar 14, 2023Observed: 449.15 ft at 6:00AM Mar 14, 2023Observed: 449.09 ft at 6:30AM Mar 14, 2023Observed: 449.06 ft at 7:00AM Mar 14, 2023Observed: 449.1 ft at 7:30AM Mar 14, 2023Observed: 449.1 ft at 8:00AM Mar 14, 2023Observed: 449.11 ft at 8:30AM Mar 14, 2023Observed: 449 ft at 9:00AM Mar 14, 2023Observed: 448.98 ft at 9:30AM Mar 14, 2023Observed: 449.03 ft at 10:00AM Mar 14, 2023Observed: 449.12 ft at 10:30AM Mar 14, 2023Observed: 449.09 ft at 11:00AM Mar 14, 2023Observed: 449.1 ft at 11:30AM Mar 14, 2023Observed: 449.14 ft at 12:00PM Mar 14, 2023Observed: 449.09 ft at 12:30PM Mar 14, 2023Observed: 449.04 ft at 1:00PM Mar 14, 2023Observed: 448.88 ft at 1:30PM Mar 14, 2023Observed: 449.09 ft at 2:00PM Mar 14, 2023Observed: 449.08 ft at 2:30PM Mar 14, 2023Observed: 449.12 ft at 3:00PM Mar 14, 2023Observed: 449.08 ft at 3:30PM Mar 14, 2023Observed: 449.11 ft at 4:00PM Mar 14, 2023Observed: 449.1 ft at 4:30PM Mar 14, 2023Observed: 449.1 ft at 5:00PM Mar 14, 2023Observed: 449.09 ft at 5:30PM Mar 14, 2023Observed: 449.06 ft at 6:00PM Mar 14, 2023Observed: 449.09 ft at 6:30PM Mar 14, 2023Observed: 449.09 ft at 7:00PM Mar 14, 2023Observed: 449.1 ft at 7:30PM Mar 14, 2023Observed: 449.09 ft at 8:00PM Mar 14, 2023Observed: 449.14 ft at 8:30PM Mar 14, 2023Observed: 449.04 ft at 9:00PM Mar 14, 2023Observed: 449.07 ft at 9:30PM Mar 14, 2023Observed: 449.08 ft at 10:00PM Mar 14, 2023Observed: 449.05 ft at 10:30PM Mar 14, 2023Observed: 449.04 ft at 11:00PM Mar 14, 2023Observed: 449.07 ft at 11:30PM Mar 14, 2023Observed: 449.06 ft at 12:00AM Mar 15, 2023Observed: 448.99 ft at 12:30AM Mar 15, 2023Observed: 449.03 ft at 1:00AM Mar 15, 2023Observed: 449.04 ft at 1:30AM Mar 15, 2023Observed: 449.02 ft at 2:00AM Mar 15, 2023Observed: 449.02 ft at 2:30AM Mar 15, 2023Observed: 449.03 ft at 3:00AM Mar 15, 2023Observed: 449 ft at 3:30AM Mar 15, 2023Observed: 448.97 ft at 4:00AM Mar 15, 2023Observed: 448.98 ft at 4:30AM Mar 15, 2023Observed: 448.96 ft at 5:00AM Mar 15, 2023Observed: 448.8 ft at 5:30AM Mar 15, 2023Observed: 448.78 ft at 6:00AM Mar 15, 2023Observed: 448.75 ft at 6:30AM Mar 15, 2023Observed: 448.77 ft at 7:00AM Mar 15, 2023Observed: 448.74 ft at 7:30AM Mar 15, 2023Observed: 448.73 ft at 8:00AM Mar 15, 2023Observed: 448.7 ft at 8:30AM Mar 15, 2023Observed: 448.69 ft at 9:00AM Mar 15, 2023Observed: 448.69 ft at 9:30AM Mar 15, 2023Observed: 448.68 ft at 10:00AM Mar 15, 2023Observed: 448.7 ft at 10:30AM Mar 15, 2023Observed: 448.59 ft at 11:00AM Mar 15, 2023Observed: 448.53 ft at 11:30AM Mar 15, 2023Observed: 448.46 ft at 12:00PM Mar 15, 2023Observed: 448.47 ft at 12:30PM Mar 15, 2023Observed: 448.48 ft at 1:00PM Mar 15, 2023Observed: 448.45 ft at 1:30PM Mar 15, 2023Observed: 448.43 ft at 2:00PM Mar 15, 2023Observed: 448.44 ft at 2:30PM Mar 15, 2023Observed: 448.39 ft at 3:00PM Mar 15, 2023Observed: 448.4 ft at 3:30PM Mar 15, 2023Observed: 448.41 ft at 4:00PM Mar 15, 2023Observed: 448.4 ft at 4:30PM Mar 15, 2023Observed: 448.31 ft at 5:00PM Mar 15, 2023Observed: 448.38 ft at 5:30PM Mar 15, 2023Observed: 448.36 ft at 6:00PM Mar 15, 2023Observed: 448.44 ft at 6:30PM Mar 15, 2023Observed: 448.33 ft at 7:00PM Mar 15, 2023Observed: 448.36 ft at 7:30PM Mar 15, 2023Observed: 448.34 ft at 8:00PM Mar 15, 2023Observed: 448.34 ft at 8:30PM Mar 15, 2023Observed: 448.34 ft at 9:00PM Mar 15, 2023Observed: 448.34 ft at 9:30PM Mar 15, 2023Observed: 448.38 ft at 10:00PM Mar 15, 2023Observed: 448.38 ft at 10:30PM Mar 15, 2023Observed: 448.31 ft at 11:00PM Mar 15, 2023Observed: 448.45 ft at 11:30PM Mar 15, 2023Observed: 448.27 ft at 12:00AM Mar 16, 2023Observed: 448.34 ft at 12:30AM Mar 16, 2023Observed: 448.41 ft at 1:00AM Mar 16, 2023Observed: 448.41 ft at 1:30AM Mar 16, 2023Observed: 448.45 ft at 2:00AM Mar 16, 2023Observed: 448.28 ft at 2:30AM Mar 16, 2023Observed: 448.3 ft at 3:00AM Mar 16, 2023Observed: 448.35 ft at 3:30AM Mar 16, 2023Observed: 448.27 ft at 4:00AM Mar 16, 2023Observed: 448.33 ft at 4:30AM Mar 16, 2023Observed: 448.29 ft at 5:00AM Mar 16, 2023Observed: 448.29 ft at 5:30AM Mar 16, 2023Observed: 448.3 ft at 6:00AM Mar 16, 2023Observed: 448.32 ft at 6:30AM Mar 16, 2023Observed: 448.27 ft at 7:00AM Mar 16, 2023Observed: 448.27 ft at 7:30AM Mar 16, 2023Observed: 448.27 ft at 8:00AM Mar 16, 2023Observed: 448.32 ft at 8:30AM Mar 16, 2023Observed: 448.26 ft at 9:00AM Mar 16, 2023Observed: 448.22 ft at 9:30AM Mar 16, 2023Observed: 448.22 ft at 10:00AM Mar 16, 2023Observed: 448.25 ft at 10:30AM Mar 16, 2023Observed: 448.16 ft at 11:00AM Mar 16, 2023Observed: 448.2 ft at 11:30AM Mar 16, 2023Observed: 448.2 ft at 12:00PM Mar 16, 2023Observed: 448.24 ft at 12:30PM Mar 16, 2023Observed: 448.37 ft at 1:00PM Mar 16, 2023Observed: 448.2 ft at 1:30PM Mar 16, 2023Observed: 448.27 ft at 2:00PM Mar 16, 2023Observed: 448.18 ft at 2:30PM Mar 16, 2023Observed: 448.17 ft at 3:00PM Mar 16, 2023Observed: 448.18 ft at 3:30PM Mar 16, 2023Observed: 448.18 ft at 4:00PM Mar 16, 2023Observed: 448.19 ft at 4:30PM Mar 16, 2023Observed: 448.34 ft at 5:00PM Mar 16, 2023Observed: 448.15 ft at 5:30PM Mar 16, 2023Observed: 448.23 ft at 6:00PM Mar 16, 2023Observed: 448.12 ft at 6:30PM Mar 16, 2023Observed: 448.18 ft at 7:00PM Mar 16, 2023Observed: 448.17 ft at 7:30PM Mar 16, 2023Observed: 448.13 ft at 8:00PM Mar 16, 2023Observed: 448.17 ft at 8:30PM Mar 16, 2023Observed: 448.16 ft at 9:00PM Mar 16, 2023Observed: 448.16 ft at 9:30PM Mar 16, 2023Observed: 448.18 ft at 10:00PM Mar 16, 2023Observed: 448.17 ft at 10:30PM Mar 16, 2023Observed: 448.18 ft at 11:00PM Mar 16, 2023Observed: 448.24 ft at 11:30PM Mar 16, 2023Observed: 448.27 ft at 12:00AM Mar 17, 2023Observed: 448.29 ft at 12:30AM Mar 17, 2023Observed: 448.26 ft at 1:00AM Mar 17, 2023Observed: 448.3 ft at 1:30AM Mar 17, 2023Observed: 448.28 ft at 2:00AM Mar 17, 2023Observed: 448.26 ft at 2:30AM Mar 17, 2023Observed: 448.22 ft at 3:00AM Mar 17, 2023Observed: 448.25 ft at 3:30AM Mar 17, 2023Observed: 448.26 ft at 4:00AM Mar 17, 2023Observed: 448.26 ft at 4:30AM Mar 17, 2023Observed: 448.31 ft at 5:00AM Mar 17, 2023Observed: 448.29 ft at 5:30AM Mar 17, 2023Observed: 448.28 ft at 6:00AM Mar 17, 2023Observed: 448.27 ft at 6:30AM Mar 17, 2023Observed: 448.27 ft at 7:00AM Mar 17, 2023Observed: 448.24 ft at 7:30AM Mar 17, 2023Observed: 448.24 ft at 8:00AM Mar 17, 2023Observed: 448.26 ft at 8:30AM Mar 17, 2023Observed: 448.2 ft at 9:00AM Mar 17, 2023Observed: 448.28 ft at 9:30AM Mar 17, 2023Observed: 448.08 ft at 10:00AM Mar 17, 2023Observed: 447.99 ft at 10:30AM Mar 17, 2023Observed: 447.94 ft at 11:00AM Mar 17, 2023Observed: 447.94 ft at 11:30AM Mar 17, 2023Observed: 447.92 ft at 12:00PM Mar 17, 2023Observed: 447.88 ft at 12:30PM Mar 17, 2023Observed: 447.86 ft at 1:00PM Mar 17, 2023Observed: 447.84 ft at 1:30PM Mar 17, 2023Observed: 448.1 ft at 2:00PM Mar 17, 2023Observed: 448.18 ft at 2:30PM Mar 17, 2023Observed: 448.16 ft at 3:00PM Mar 17, 2023Observed: 448.27 ft at 3:30PM Mar 17, 2023Observed: 448.27 ft at 4:00PM Mar 17, 2023Observed: 448.33 ft at 4:30PM Mar 17, 2023Observed: 448.43 ft at 5:00PM Mar 17, 2023Observed: 448.45 ft at 5:30PM Mar 17, 2023Observed: 448.51 ft at 6:00PM Mar 17, 2023Observed: 448.54 ft at 6:30PM Mar 17, 2023Observed: 448.57 ft at 7:00PM Mar 17, 2023Observed: 448.43 ft at 7:30PM Mar 17, 2023Observed: 448.49 ft at 8:00PM Mar 17, 2023Observed: 448.7 ft at 8:30PM Mar 17, 2023Observed: 448.58 ft at 9:00PM Mar 17, 2023Observed: 448.47 ft at 9:30PM Mar 17, 2023Observed: 448.52 ft at 10:00PM Mar 17, 2023Observed: 448.51 ft at 10:30PM Mar 17, 2023Observed: 448.54 ft at 11:00PM Mar 17, 2023Observed: 448.51 ft at 11:30PM Mar 17, 2023Observed: 448.54 ft at 12:00AM Mar 18, 2023Observed: 448.55 ft at 12:30AM Mar 18, 2023Observed: 448.54 ft at 1:00AM Mar 18, 2023Observed: 448.68 ft at 1:30AM Mar 18, 2023Observed: 448.78 ft at 2:00AM Mar 18, 2023Observed: 448.79 ft at 2:30AM Mar 18, 2023Observed: 448.88 ft at 3:00AM Mar 18, 2023Observed: 448.89 ft at 3:30AM Mar 18, 2023Observed: 448.92 ft at 4:00AM Mar 18, 2023Observed: 448.91 ft at 4:30AM Mar 18, 2023Observed: 448.95 ft at 5:00AM Mar 18, 2023Observed: 448.92 ft at 5:30AM Mar 18, 2023Observed: 448.99 ft at 6:00AM Mar 18, 2023Observed: 448.99 ft at 6:30AM Mar 18, 2023Observed: 448.98 ft at 7:00AM Mar 18, 2023Observed: 449.01 ft at 7:30AM Mar 18, 2023Observed: 448.96 ft at 8:00AM Mar 18, 2023Observed: 449.08 ft at 8:30AM Mar 18, 2023Observed: 448.92 ft at 9:00AM Mar 18, 2023Observed: 449.05 ft at 9:30AM Mar 18, 2023Observed: 448.99 ft at 10:00AM Mar 18, 2023Observed: 449.07 ft at 10:30AM Mar 18, 2023Observed: 449.06 ft at 11:00AM Mar 18, 2023Observed: 449.12 ft at 11:30AM Mar 18, 2023Observed: 449.08 ft at 12:00PM Mar 18, 2023Observed: 449.05 ft at 12:30PM Mar 18, 2023Observed: 449.03 ft at 1:00PM Mar 18, 2023Observed: 449.1 ft at 1:30PM Mar 18, 2023Observed: 449.44 ft at 2:00PM Mar 18, 2023Observed: 449.14 ft at 2:30PM Mar 18, 2023Observed: 449.09 ft at 3:00PM Mar 18, 2023Observed: 449.1 ft at 3:30PM Mar 18, 2023Observed: 449.08 ft at 4:00PM Mar 18, 2023Observed: 449.47 ft at 4:30PM Mar 18, 2023Observed: 449.06 ft at 5:00PM Mar 18, 2023Observed: 449.06 ft at 5:30PM Mar 18, 2023Observed: 449.06 ft at 6:00PM Mar 18, 2023Observed: 449.05 ft at 6:30PM Mar 18, 2023Observed: 448.97 ft at 7:00PM Mar 18, 2023Observed: 449.04 ft at 7:30PM Mar 18, 2023Observed: 449 ft at 8:00PM Mar 18, 2023Observed: 449.08 ft at 8:30PM Mar 18, 2023Observed: 449.06 ft at 9:00PM Mar 18, 2023Observed: 448.93 ft at 9:30PM Mar 18, 2023Observed: 448.91 ft at 10:00PM Mar 18, 2023Observed: 448.86 ft at 10:30PM Mar 18, 2023Observed: 448.89 ft at 11:00PM Mar 18, 2023Observed: 448.84 ft at 11:30PM Mar 18, 2023Observed: 448.82 ft at 12:00AM Mar 19, 2023Observed: 448.86 ft at 12:30AM Mar 19, 2023Observed: 448.87 ft at 1:00AM Mar 19, 2023Observed: 448.85 ft at 1:30AM Mar 19, 2023Observed: 448.85 ft at 2:00AM Mar 19, 2023Observed: 448.83 ft at 2:30AM Mar 19, 2023Observed: 448.85 ft at 3:00AM Mar 19, 2023Observed: 448.83 ft at 3:30AM Mar 19, 2023Observed: 448.82 ft at 4:00AM Mar 19, 2023Observed: 448.8 ft at 4:30AM Mar 19, 2023Observed: 448.81 ft at 5:00AM Mar 19, 2023Observed: 448.81 ft at 5:30AM Mar 19, 2023Observed: 448.8 ft at 6:00AM Mar 19, 2023Observed: 448.79 ft at 6:30AM Mar 19, 2023Observed: 448.8 ft at 7:00AM Mar 19, 2023Observed: 448.77 ft at 7:30AM Mar 19, 2023Observed: 448.78 ft at 8:00AM Mar 19, 2023Observed: 448.78 ft at 8:30AM Mar 19, 2023Observed: 448.54 ft at 9:00AM Mar 19, 2023Observed: 448.49 ft at 9:30AM Mar 19, 2023Observed: 448.43 ft at 10:00AM Mar 19, 2023Observed: 448.42 ft at 10:30AM Mar 19, 2023Observed: 448.38 ft at 11:00AM Mar 19, 2023Observed: 448.36 ft at 11:30AM Mar 19, 2023Observed: 448.38 ft at 12:00PM Mar 19, 2023Observed: 448.34 ft at 12:30PM Mar 19, 2023Observed: 448.34 ft at 1:00PM Mar 19, 2023Observed: 448.33 ft at 1:30PM Mar 19, 2023Observed: 448.28 ft at 2:00PM Mar 19, 2023Observed: 448.32 ft at 2:30PM Mar 19, 2023Observed: 448.3 ft at 3:00PM Mar 19, 2023Observed: 448.29 ft at 3:30PM Mar 19, 2023Observed: 448.27 ft at 4:00PM Mar 19, 2023Observed: 448.26 ft at 4:30PM Mar 19, 2023Observed: 448.17 ft at 5:00PM Mar 19, 2023Observed: 448.18 ft at 5:30PM Mar 19, 2023Observed: 448.28 ft at 6:00PM Mar 19, 2023Observed: 448.13 ft at 6:30PM Mar 19, 2023Observed: 448.19 ft at 7:00PM Mar 19, 2023Observed: 448.14 ft at 7:30PM Mar 19, 2023Observed: 448.18 ft at 8:00PM Mar 19, 2023Observed: 448.14 ft at 8:30PM Mar 19, 2023Observed: 448.08 ft at 9:00PM Mar 19, 2023Observed: 448.16 ft at 9:30PM Mar 19, 2023Observed: 448.26 ft at 10:00PM Mar 19, 2023Observed: 448.11 ft at 10:30PM Mar 19, 2023Observed: 448.09 ft at 11:00PM Mar 19, 2023Observed: 448.24 ft at 11:30PM Mar 19, 2023Observed: 448.12 ft at 12:00AM Mar 20, 2023Observed: 448.17 ft at 12:30AM Mar 20, 2023Observed: 448.11 ft at 1:00AM Mar 20, 2023Observed: 448.11 ft at 1:30AM Mar 20, 2023Observed: 448.09 ft at 2:00AM Mar 20, 2023Observed: 448.12 ft at 2:30AM Mar 20, 2023Observed: 448.11 ft at 3:00AM Mar 20, 2023Observed: 448.05 ft at 3:30AM Mar 20, 2023Observed: 448.08 ft at 4:00AM Mar 20, 2023Observed: 448.23 ft at 4:30AM Mar 20, 2023Observed: 448.05 ft at 5:00AM Mar 20, 2023Observed: 448.03 ft at 5:30AM Mar 20, 2023Observed: 448.06 ft at 6:00AM Mar 20, 2023Observed: 448.05 ft at 6:30AM Mar 20, 2023Observed: 448.04 ft at 7:00AM Mar 20, 2023Observed: 448.04 ft at 7:30AM Mar 20, 2023Observed: 448.13 ft at 8:00AM Mar 20, 2023Observed: 448.02 ft at 8:30AM Mar 20, 2023Observed: 448.13 ft at 9:00AM Mar 20, 2023Observed: 448.08 ft at 9:30AM Mar 20, 2023Observed: 448.37 ft at 10:00AM Mar 20, 2023Observed: 448.05 ft at 10:30AM Mar 20, 2023Observed: 448.03 ft at 11:00AM Mar 20, 2023Observed: 448.07 ft at 11:30AM Mar 20, 2023Observed: 448.19 ft at 12:00PM Mar 20, 2023Observed: 448.04 ft at 12:30PM Mar 20, 2023Observed: 448.02 ft at 1:00PM Mar 20, 2023Observed: 448.02 ft at 1:30PM Mar 20, 2023Observed: 448.03 ft at 2:00PM Mar 20, 2023Observed: 448.05 ft at 2:30PM Mar 20, 2023Observed: 448 ft at 3:00PM Mar 20, 2023Highest Forecast: 447.8 ft 7:00PM Mar 20, 2023Forecast: 447.6 ft 1:00AM Mar 21, 2023Forecast: 447.5 ft 7:00AM Mar 21, 2023Forecast: 447.4 ft 1:00PM Mar 21, 2023Forecast: 447.3 ft 7:00PM Mar 21, 2023Forecast: 447.2 ft 1:00AM Mar 22, 2023Forecast: 447.1 ft 7:00AM Mar 22, 2023Forecast: 446.9 ft 1:00PM Mar 22, 2023Forecast: 446.8 ft 7:00PM Mar 22, 2023Forecast: 446.7 ft 1:00AM Mar 23, 2023Forecast: 446.6 ft 7:00AM Mar 23, 2023Forecast: 446.5 ft 1:00PM Mar 23, 2023Forecast: 446.4 ft 7:00PM Mar 23, 2023Forecast: 446.3 ft 1:00AM Mar 24, 2023Forecast: 446.2 ft 7:00AM Mar 24, 2023Forecast: 446.1 ft 1:00PM Mar 24, 2023Forecast: 446 ft 7:00PM Mar 24, 2023Forecast: 445.9 ft 1:00AM Mar 25, 2023Forecast: 445.7 ft 7:00AM Mar 25, 2023Forecast: 445.6 ft 1:00PM Mar 25, 2023Forecast: 445.5 ft 7:00PM Mar 25, 2023Forecast: 445.4 ft 1:00AM Mar 26, 2023Forecast: 445.3 ft 7:00AM Mar 26, 2023Forecast: 445.2 ft 1:00PM Mar 26, 2023Forecast: 445.1 ft 7:00PM Mar 26, 2023Forecast: 445 ft 1:00AM Mar 27, 2023Forecast: 444.9 ft 7:00AM Mar 27, 2023USACESRDI2(plotting HTIRG) Graph Created (4:25PM Mar 20, 2023)ObservedForecast (issued 10:24AM Mar 20)Latest observed value: 448 ft at 3:00 PM CDT 20-Mar-2023. Flood Stage is 450 ft
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About this graph
Tabular Data (UTC)
Tabular Data (CDT)
XML Data
RSS Files
Datum: NAVD88
Metadata
NOTE: River forecasts for this location take into account past precipitation and the precipitation amounts expected approximately 48 hours into the future from the forecast issuance time.

NOTE: Forecasts for the Illinois River at Starved Rock Lock (tailwater) are issued routinely year-round.

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Upstream Gauge - at Ottawa Upstream Gauge Downstream Gauge Downstream Gauge - near La Salle
Flood Categories (in feet)
Major Flood Stage: 465
Moderate Flood Stage: 460
Flood Stage: 450
Action Stage: 449
Low Stage (in feet): 438.7

Historic Crests
(1) 467.81 ft on 04/19/2013
(2) 467.31 ft on 09/16/2008
(3) 465.86 ft on 05/19/2020
(4) 464.70 ft on 12/05/1982
(5) 464.61 ft on 05/03/2019
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 465.86 ft on 05/19/2020
(2) 464.61 ft on 05/03/2019
(3) 463.65 ft on 02/22/2018
(4) 460.14 ft on 05/02/2017
(5) 461.82 ft on 12/30/2015
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) 439.90 ft on 10/03/2012
(2) 440.34 ft on 10/01/2017
(3) 440.38 ft on 10/16/2015
(4) 440.78 ft on 09/28/2020

For more information on your flood risk go to www.floodsmart.gov.
Zoom Level:15
KML Image
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
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467.5 North Utica Village Hall and North Utica Police Department are threatened.
464.5 A few residences threatened in North Utica. IL-178 (Clark Street) threatened in North Utica.
463 A couple structures threatened in North Utica.
461.5 High water causes the Starved Rock Lock to shut down.
459 Dee Bennet Road is threatened between Ottawa and Utica.
458 High water levels begin to impact shipping interests along the river.
455 High water causes the Starved Rock Hydroelectric Power Station to shut down.
Photos
(1) Starved Rock
(2) Gates at lock and dam September 2010.
(3) Looking upstream. September 2010.
Low Water Impacts Collapse
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438.7 Low water levels begin to impact shipping interests along the river.
About This Location Collapse

Latitude: 41.325062° N, Longitude: 88.987417° W, Horizontal Datum: Unknown

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft 450 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 -0.19 449.81 Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps
NGVD 29 Not Available 450.0 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?
How low could the river get?
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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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