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Hydrograph River at a Glance Download
Illinois River at Starved Rock Lock (tailwater) Tailwater (ft)Flow (kcfs)Observed: 441.87 ft at 9:30PM Aug 16, 2019Observed: 441.76 ft at 10:00PM Aug 16, 2019Observed: 441.68 ft at 10:30PM Aug 16, 2019Observed: 441.66 ft at 11:00PM Aug 16, 2019Observed: 441.77 ft at 11:30PM Aug 16, 2019Observed: 441.51 ft at 12:00AM Aug 17, 2019Observed: 441.62 ft at 12:30AM Aug 17, 2019Observed: 441.54 ft at 1:00AM Aug 17, 2019Observed: 441.55 ft at 1:30AM Aug 17, 2019Observed: 441.91 ft at 2:00AM Aug 17, 2019Observed: 441.7 ft at 2:30AM Aug 17, 2019Observed: 441.6 ft at 3:00AM Aug 17, 2019Observed: 441.52 ft at 3:30AM Aug 17, 2019Observed: 441.62 ft at 4:00AM Aug 17, 2019Observed: 441.64 ft at 4:30AM Aug 17, 2019Observed: 441.66 ft at 5:00AM Aug 17, 2019Observed: 441.71 ft at 5:30AM Aug 17, 2019Observed: 441.75 ft at 6:00AM Aug 17, 2019Observed: 441.78 ft at 6:30AM Aug 17, 2019Observed: 441.7 ft at 7:00AM Aug 17, 2019Observed: 441.91 ft at 7:30AM Aug 17, 2019Observed: 441.95 ft at 8:00AM Aug 17, 2019Observed: 441.89 ft at 8:30AM Aug 17, 2019Observed: 442 ft at 9:00AM Aug 17, 2019Observed: 442.08 ft at 9:30AM Aug 17, 2019Observed: 442.21 ft at 10:00AM Aug 17, 2019Observed: 442.09 ft at 10:30AM Aug 17, 2019Observed: 442.14 ft at 11:00AM Aug 17, 2019Observed: 442.16 ft at 11:30AM Aug 17, 2019Observed: 442.2 ft at 12:00PM Aug 17, 2019Observed: 441.87 ft at 12:30PM Aug 17, 2019Observed: 442.12 ft at 1:00PM Aug 17, 2019Observed: 442.29 ft at 1:30PM Aug 17, 2019Observed: 442.15 ft at 2:00PM Aug 17, 2019Observed: 442.17 ft at 2:30PM Aug 17, 2019Observed: 442.22 ft at 3:00PM Aug 17, 2019Observed: 442.26 ft at 3:30PM Aug 17, 2019Observed: 442.24 ft at 4:00PM Aug 17, 2019Observed: 442.13 ft at 4:30PM Aug 17, 2019Observed: 442.14 ft at 5:00PM Aug 17, 2019Observed: 441.97 ft at 5:30PM Aug 17, 2019Observed: 442.03 ft at 6:00PM Aug 17, 2019Observed: 442.04 ft at 6:30PM Aug 17, 2019Observed: 441.98 ft at 7:00PM Aug 17, 2019Observed: 442.07 ft at 7:30PM Aug 17, 2019Observed: 442.16 ft at 8:00PM Aug 17, 2019Observed: 441.88 ft at 8:30PM Aug 17, 2019Observed: 441.98 ft at 9:00PM Aug 17, 2019Observed: 441.82 ft at 9:30PM Aug 17, 2019Observed: 441.93 ft at 10:00PM Aug 17, 2019Observed: 441.88 ft at 10:30PM Aug 17, 2019Observed: 441.83 ft at 11:00PM Aug 17, 2019Observed: 441.92 ft at 11:30PM Aug 17, 2019Observed: 442.04 ft at 12:00AM Aug 18, 2019Observed: 441.88 ft at 12:30AM Aug 18, 2019Observed: 441.98 ft at 1:00AM Aug 18, 2019Observed: 442.05 ft at 1:30AM Aug 18, 2019Observed: 442 ft at 2:00AM Aug 18, 2019Observed: 442 ft at 2:30AM Aug 18, 2019Observed: 442.06 ft at 3:00AM Aug 18, 2019Observed: 442.06 ft at 3:30AM Aug 18, 2019Observed: 441.92 ft at 4:00AM Aug 18, 2019Observed: 441.96 ft at 4:30AM Aug 18, 2019Observed: 441.79 ft at 5:00AM Aug 18, 2019Observed: 442.05 ft at 5:30AM Aug 18, 2019Observed: 442.02 ft at 6:00AM Aug 18, 2019Observed: 441.97 ft at 6:30AM Aug 18, 2019Observed: 441.96 ft at 7:00AM Aug 18, 2019Observed: 441.92 ft at 7:30AM Aug 18, 2019Observed: 441.89 ft at 8:00AM Aug 18, 2019Observed: 441.86 ft at 8:30AM Aug 18, 2019Observed: 441.94 ft at 9:00AM Aug 18, 2019Observed: 442 ft at 9:30AM Aug 18, 2019Observed: 442.06 ft at 10:00AM Aug 18, 2019Observed: 442.36 ft at 10:30AM Aug 18, 2019Observed: 442.06 ft at 11:00AM Aug 18, 2019Observed: 442.08 ft at 11:30AM Aug 18, 2019Observed: 442.07 ft at 12:00PM Aug 18, 2019Observed: 442.1 ft at 12:30PM Aug 18, 2019Observed: 442.07 ft at 1:00PM Aug 18, 2019Observed: 442.08 ft at 1:30PM Aug 18, 2019Observed: 442.04 ft at 2:00PM Aug 18, 2019Observed: 442.11 ft at 2:30PM Aug 18, 2019Observed: 442.14 ft at 3:00PM Aug 18, 2019Observed: 442.1 ft at 3:30PM Aug 18, 2019Observed: 442.23 ft at 4:00PM Aug 18, 2019Observed: 442.2 ft at 4:30PM Aug 18, 2019Observed: 442.28 ft at 5:00PM Aug 18, 2019Observed: 442.22 ft at 5:30PM Aug 18, 2019Observed: 442.28 ft at 6:00PM Aug 18, 2019Observed: 442.33 ft at 6:30PM Aug 18, 2019Observed: 442.4 ft at 7:00PM Aug 18, 2019Observed: 442.46 ft at 7:30PM Aug 18, 2019Observed: 442.45 ft at 8:00PM Aug 18, 2019Observed: 442.39 ft at 8:30PM Aug 18, 2019Observed: 442.73 ft at 9:00PM Aug 18, 2019Observed: 442.73 ft at 9:30PM Aug 18, 2019Observed: 442.77 ft at 10:00PM Aug 18, 2019Observed: 442.91 ft at 10:30PM Aug 18, 2019Observed: 443.04 ft at 11:00PM Aug 18, 2019Observed: 443.04 ft at 11:30PM Aug 18, 2019Observed: 442.96 ft at 12:00AM Aug 19, 2019Observed: 443.14 ft at 12:30AM Aug 19, 2019Observed: 443.28 ft at 1:00AM Aug 19, 2019Observed: 443.16 ft at 1:30AM Aug 19, 2019Observed: 443.15 ft at 2:00AM Aug 19, 2019Observed: 443.07 ft at 2:30AM Aug 19, 2019Observed: 443.24 ft at 3:00AM Aug 19, 2019Observed: 443.55 ft at 3:30AM Aug 19, 2019Observed: 443.14 ft at 4:00AM Aug 19, 2019Observed: 443.15 ft at 4:30AM Aug 19, 2019Observed: 443.14 ft at 5:00AM Aug 19, 2019Observed: 443.4 ft at 5:30AM Aug 19, 2019Observed: 443.17 ft at 6:00AM Aug 19, 2019Observed: 443.17 ft at 6:30AM Aug 19, 2019Observed: 443.2 ft at 7:00AM Aug 19, 2019Observed: 443.36 ft at 7:30AM Aug 19, 2019Observed: 443.46 ft at 8:00AM Aug 19, 2019Observed: 443.5 ft at 8:30AM Aug 19, 2019Observed: 443.56 ft at 9:00AM Aug 19, 2019Observed: 443.59 ft at 9:30AM Aug 19, 2019Observed: 443.6 ft at 10:00AM Aug 19, 2019Observed: 443.54 ft at 10:30AM Aug 19, 2019Observed: 443.42 ft at 11:00AM Aug 19, 2019Observed: 443.41 ft at 11:30AM Aug 19, 2019Observed: 443.38 ft at 12:00PM Aug 19, 2019Observed: 443.38 ft at 12:30PM Aug 19, 2019Observed: 443.36 ft at 1:00PM Aug 19, 2019Observed: 443.35 ft at 1:30PM Aug 19, 2019Observed: 443.33 ft at 2:00PM Aug 19, 2019Observed: 443.33 ft at 2:30PM Aug 19, 2019Observed: 443.32 ft at 3:00PM Aug 19, 2019Observed: 443.34 ft at 3:30PM Aug 19, 2019Observed: 443.31 ft at 4:00PM Aug 19, 2019Observed: 443.07 ft at 4:30PM Aug 19, 2019Observed: 443 ft at 5:00PM Aug 19, 2019Observed: 442.91 ft at 5:30PM Aug 19, 2019Observed: 442.87 ft at 6:00PM Aug 19, 2019Observed: 442.93 ft at 6:30PM Aug 19, 2019Observed: 442.4 ft at 7:00PM Aug 19, 2019Observed: 442.67 ft at 7:30PM Aug 19, 2019Observed: 442.33 ft at 8:00PM Aug 19, 2019Observed: 442.28 ft at 8:30PM Aug 19, 2019Observed: 442.23 ft at 9:00PM Aug 19, 2019Observed: 442.21 ft at 9:30PM Aug 19, 2019Observed: 442.15 ft at 10:00PM Aug 19, 2019Observed: 442.14 ft at 10:30PM Aug 19, 2019Observed: 442.15 ft at 11:00PM Aug 19, 2019Observed: 442.23 ft at 11:30PM Aug 19, 2019Observed: 442.57 ft at 12:00AM Aug 20, 2019Observed: 442.35 ft at 12:30AM Aug 20, 2019Observed: 442.43 ft at 1:00AM Aug 20, 2019Observed: 442.46 ft at 1:30AM Aug 20, 2019Observed: 442.51 ft at 2:00AM Aug 20, 2019Observed: 442.53 ft at 2:30AM Aug 20, 2019Observed: 442.59 ft at 3:00AM Aug 20, 2019Observed: 442.58 ft at 3:30AM Aug 20, 2019Observed: 442.65 ft at 4:00AM Aug 20, 2019Observed: 442.6 ft at 4:30AM Aug 20, 2019Observed: 442.61 ft at 5:00AM Aug 20, 2019Observed: 442.59 ft at 5:30AM Aug 20, 2019Observed: 442.57 ft at 6:00AM Aug 20, 2019Observed: 442.59 ft at 6:30AM Aug 20, 2019Observed: 442.59 ft at 7:00AM Aug 20, 2019Observed: 442.59 ft at 7:30AM Aug 20, 2019Observed: 442.58 ft at 8:00AM Aug 20, 2019Observed: 442.87 ft at 8:30AM Aug 20, 2019Observed: 443 ft at 9:00AM Aug 20, 2019Observed: 443.22 ft at 9:30AM Aug 20, 2019Observed: 443.44 ft at 10:00AM Aug 20, 2019Observed: 443.55 ft at 10:30AM Aug 20, 2019Observed: 443.66 ft at 11:00AM Aug 20, 2019Observed: 443.69 ft at 11:30AM Aug 20, 2019Observed: 443.77 ft at 12:00PM Aug 20, 2019Highest Observation: 443.8 ft at 12:30PM Aug 20, 2019Observed: 443.58 ft at 1:00PM Aug 20, 2019Observed: 443.3 ft at 1:30PM Aug 20, 2019Observed: 443.17 ft at 2:00PM Aug 20, 2019Observed: 443.1 ft at 2:30PM Aug 20, 2019Observed: 443.06 ft at 3:00PM Aug 20, 2019Observed: 443 ft at 3:30PM Aug 20, 2019Observed: 442.94 ft at 4:00PM Aug 20, 2019Observed: 442.89 ft at 4:30PM Aug 20, 2019Observed: 442.82 ft at 5:00PM Aug 20, 2019Observed: 442.77 ft at 5:30PM Aug 20, 2019Observed: 442.67 ft at 6:00PM Aug 20, 2019Observed: 442.68 ft at 6:30PM Aug 20, 2019Observed: 442.68 ft at 7:00PM Aug 20, 2019Observed: 442.65 ft at 7:30PM Aug 20, 2019Observed: 442.62 ft at 8:00PM Aug 20, 2019Observed: 442.59 ft at 8:30PM Aug 20, 2019Observed: 442.39 ft at 9:00PM Aug 20, 2019Observed: 442.33 ft at 9:30PM Aug 20, 2019Observed: 442.54 ft at 10:00PM Aug 20, 2019Observed: 442.49 ft at 10:30PM Aug 20, 2019Observed: 442.46 ft at 11:00PM Aug 20, 2019Observed: 442.37 ft at 11:30PM Aug 20, 2019Observed: 442.48 ft at 12:00AM Aug 21, 2019Observed: 442.48 ft at 12:30AM Aug 21, 2019Observed: 442.37 ft at 1:00AM Aug 21, 2019Observed: 442.49 ft at 1:30AM Aug 21, 2019Observed: 442.51 ft at 2:00AM Aug 21, 2019Observed: 442.55 ft at 2:30AM Aug 21, 2019Observed: 442.56 ft at 3:00AM Aug 21, 2019Observed: 442.56 ft at 3:30AM Aug 21, 2019Observed: 442.55 ft at 4:00AM Aug 21, 2019Observed: 442.56 ft at 4:30AM Aug 21, 2019Observed: 442.56 ft at 5:00AM Aug 21, 2019Observed: 442.55 ft at 5:30AM Aug 21, 2019Observed: 442.85 ft at 6:00AM Aug 21, 2019Observed: 442.9 ft at 6:30AM Aug 21, 2019Observed: 442.97 ft at 7:00AM Aug 21, 2019Observed: 443 ft at 7:30AM Aug 21, 2019Observed: 443.06 ft at 8:00AM Aug 21, 2019Observed: 443.08 ft at 8:30AM Aug 21, 2019Observed: 443.09 ft at 9:00AM Aug 21, 2019Observed: 443.14 ft at 9:30AM Aug 21, 2019Observed: 443.17 ft at 10:00AM Aug 21, 2019Observed: 443.19 ft at 10:30AM Aug 21, 2019Observed: 443.38 ft at 11:00AM Aug 21, 2019Observed: 443.43 ft at 11:30AM Aug 21, 2019Observed: 443.46 ft at 12:00PM Aug 21, 2019Observed: 443.5 ft at 12:30PM Aug 21, 2019Observed: 443.19 ft at 1:00PM Aug 21, 2019Observed: 442.94 ft at 1:30PM Aug 21, 2019Observed: 442.98 ft at 2:00PM Aug 21, 2019Observed: 442.58 ft at 2:30PM Aug 21, 2019Observed: 442.34 ft at 3:00PM Aug 21, 2019Observed: 442.22 ft at 3:30PM Aug 21, 2019Observed: 442.24 ft at 4:00PM Aug 21, 2019Observed: 442.31 ft at 4:30PM Aug 21, 2019Observed: 442.3 ft at 5:00PM Aug 21, 2019Observed: 442.2 ft at 5:30PM Aug 21, 2019Observed: 442.35 ft at 6:00PM Aug 21, 2019Observed: 442.41 ft at 6:30PM Aug 21, 2019Observed: 442.34 ft at 7:00PM Aug 21, 2019Observed: 442.23 ft at 7:30PM Aug 21, 2019Observed: 442.27 ft at 8:00PM Aug 21, 2019Observed: 442.31 ft at 8:30PM Aug 21, 2019Observed: 442.31 ft at 9:00PM Aug 21, 2019Observed: 442.24 ft at 9:30PM Aug 21, 2019Observed: 442.25 ft at 10:00PM Aug 21, 2019Observed: 442.29 ft at 10:30PM Aug 21, 2019Observed: 442.28 ft at 11:00PM Aug 21, 2019Observed: 442.26 ft at 11:30PM Aug 21, 2019Observed: 442.4 ft at 12:00AM Aug 22, 2019Observed: 442.22 ft at 12:30AM Aug 22, 2019Observed: 442.47 ft at 1:00AM Aug 22, 2019Observed: 442.62 ft at 1:30AM Aug 22, 2019Observed: 442.55 ft at 2:00AM Aug 22, 2019Observed: 442.57 ft at 2:30AM Aug 22, 2019Observed: 442.53 ft at 3:00AM Aug 22, 2019Observed: 442.59 ft at 3:30AM Aug 22, 2019Observed: 442.63 ft at 4:00AM Aug 22, 2019Observed: 442.63 ft at 4:30AM Aug 22, 2019Observed: 442.64 ft at 5:00AM Aug 22, 2019Observed: 442.75 ft at 5:30AM Aug 22, 2019Observed: 442.68 ft at 6:00AM Aug 22, 2019Observed: 442.65 ft at 6:30AM Aug 22, 2019Observed: 442.67 ft at 7:00AM Aug 22, 2019Observed: 442.69 ft at 7:30AM Aug 22, 2019Observed: 442.7 ft at 8:00AM Aug 22, 2019Observed: 442.66 ft at 8:30AM Aug 22, 2019Observed: 442.67 ft at 9:00AM Aug 22, 2019Observed: 442.67 ft at 9:30AM Aug 22, 2019Observed: 442.67 ft at 10:00AM Aug 22, 2019Observed: 442.72 ft at 10:30AM Aug 22, 2019Observed: 442.7 ft at 11:00AM Aug 22, 2019Observed: 442.64 ft at 11:30AM Aug 22, 2019Observed: 442.63 ft at 12:00PM Aug 22, 2019Observed: 442.62 ft at 12:30PM Aug 22, 2019Observed: 442.62 ft at 1:00PM Aug 22, 2019Observed: 442.62 ft at 1:30PM Aug 22, 2019Observed: 442.62 ft at 2:00PM Aug 22, 2019Observed: 442.6 ft at 2:30PM Aug 22, 2019Observed: 442.62 ft at 3:00PM Aug 22, 2019Observed: 442.6 ft at 3:30PM Aug 22, 2019Observed: 442.41 ft at 4:00PM Aug 22, 2019Observed: 442.36 ft at 4:30PM Aug 22, 2019Observed: 442.26 ft at 5:00PM Aug 22, 2019Observed: 441.93 ft at 5:30PM Aug 22, 2019Observed: 441.86 ft at 6:00PM Aug 22, 2019Observed: 441.8 ft at 6:30PM Aug 22, 2019Observed: 441.72 ft at 7:00PM Aug 22, 2019Observed: 441.57 ft at 7:30PM Aug 22, 2019Observed: 441.55 ft at 8:00PM Aug 22, 2019Observed: 441.49 ft at 8:30PM Aug 22, 2019Observed: 441.45 ft at 9:00PM Aug 22, 2019Observed: 441.57 ft at 9:30PM Aug 22, 2019Observed: 441.39 ft at 10:00PM Aug 22, 2019Observed: 441.45 ft at 10:30PM Aug 22, 2019Observed: 441.48 ft at 11:00PM Aug 22, 2019Observed: 441.46 ft at 11:30PM Aug 22, 2019Observed: 441.49 ft at 12:00AM Aug 23, 2019Observed: 441.55 ft at 12:30AM Aug 23, 2019Observed: 441.74 ft at 1:00AM Aug 23, 2019Observed: 441.68 ft at 1:30AM Aug 23, 2019Observed: 441.92 ft at 2:00AM Aug 23, 2019Observed: 441.91 ft at 2:30AM Aug 23, 2019Observed: 442.2 ft at 3:00AM Aug 23, 2019Observed: 441.91 ft at 3:30AM Aug 23, 2019Observed: 441.96 ft at 4:00AM Aug 23, 2019Observed: 441.98 ft at 4:30AM Aug 23, 2019Observed: 441.98 ft at 5:00AM Aug 23, 2019Observed: 441.97 ft at 5:30AM Aug 23, 2019Observed: 441.99 ft at 6:00AM Aug 23, 2019Observed: 442.07 ft at 6:30AM Aug 23, 2019Observed: 442.01 ft at 7:00AM Aug 23, 2019Observed: 442 ft at 7:30AM Aug 23, 2019Observed: 442.02 ft at 8:00AM Aug 23, 2019Observed: 442.01 ft at 8:30AM Aug 23, 2019Observed: 442.02 ft at 9:00AM Aug 23, 2019Observed: 441.99 ft at 9:30AM Aug 23, 2019Observed: 441.99 ft at 10:00AM Aug 23, 2019Observed: 442.15 ft at 10:30AM Aug 23, 2019Observed: 442.19 ft at 11:00AM Aug 23, 2019Observed: 442.21 ft at 11:30AM Aug 23, 2019Observed: 442.25 ft at 12:00PM Aug 23, 2019Observed: 442.27 ft at 12:30PM Aug 23, 2019Observed: 442.3 ft at 1:00PM Aug 23, 2019Observed: 442.3 ft at 1:30PM Aug 23, 2019Observed: 442.32 ft at 2:00PM Aug 23, 2019Observed: 442.34 ft at 2:30PM Aug 23, 2019Observed: 442.38 ft at 3:00PM Aug 23, 2019Observed: 442.4 ft at 3:30PM Aug 23, 2019Observed: 442.38 ft at 4:00PM Aug 23, 2019Observed: 442.37 ft at 4:30PM Aug 23, 2019Observed: 442.37 ft at 5:00PM Aug 23, 2019Observed: 442.39 ft at 5:30PM Aug 23, 2019Observed: 442.54 ft at 6:00PM Aug 23, 2019Observed: 442.72 ft at 6:30PM Aug 23, 2019Observed: 442.87 ft at 7:00PM Aug 23, 2019Observed: 442.66 ft at 7:30PM Aug 23, 2019Observed: 442.52 ft at 8:00PM Aug 23, 2019Highest Forecast: 442 ft 1:00AM Aug 24, 2019Forecast: 441.9 ft 7:00AM Aug 24, 2019Forecast: 441.9 ft 1:00PM Aug 24, 2019Forecast: 441.8 ft 7:00PM Aug 24, 2019Forecast: 441.8 ft 1:00AM Aug 25, 2019Forecast: 441.7 ft 7:00AM Aug 25, 2019Forecast: 441.7 ft 1:00PM Aug 25, 2019Forecast: 441.7 ft 7:00PM Aug 25, 2019Forecast: 441.7 ft 1:00AM Aug 26, 2019Forecast: 441.7 ft 7:00AM Aug 26, 2019Forecast: 441.6 ft 1:00PM Aug 26, 2019Forecast: 441.6 ft 7:00PM Aug 26, 2019Forecast: 441.6 ft 1:00AM Aug 27, 2019Forecast: 441.6 ft 7:00AM Aug 27, 2019Forecast: 441.6 ft 1:00PM Aug 27, 2019Forecast: 441.5 ft 7:00PM Aug 27, 2019Forecast: 441.5 ft 1:00AM Aug 28, 2019Forecast: 441.5 ft 7:00AM Aug 28, 2019Forecast: 441.5 ft 1:00PM Aug 28, 2019Forecast: 441.5 ft 7:00PM Aug 28, 2019Forecast: 441.5 ft 1:00AM Aug 29, 2019Forecast: 441.5 ft 7:00AM Aug 29, 2019Forecast: 441.5 ft 1:00PM Aug 29, 2019Forecast: 441.5 ft 7:00PM Aug 29, 2019Forecast: 441.4 ft 1:00AM Aug 30, 2019Forecast: 441.4 ft 7:00AM Aug 30, 2019USACESRDI2(plotting HTIRG) Graph Created (9:24PM Aug 23, 2019)ObservedForecast (issued 10:09AM Aug 23)Latest observed value: 442.52 ft at 8:00 PM CDT 23-Aug-2019. Flood Stage is 450 ft
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About this graph
Tabular Data (UTC)
Tabular Data (CDT)
XML Data
RSS Files
Datum: Not Available
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 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: 0
Moderate Flood Stage: 0
Flood Stage: 450
Action Stage: 0
Low Stage (in feet): -9999

Historic Crests
(1) 467.81 ft on 04/19/2013
(2) 467.31 ft on 09/16/2008
(3) 464.70 ft on 12/05/1982
(4) 464.61 ft on 05/03/2019 (P)
(5) 464.60 ft on 02/22/1997
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 464.61 ft on 05/03/2019 (P)
(2) 463.65 ft on 02/22/2018 (P)
(3) 453.33 ft on 10/16/2017 (P)
(4) 455.24 ft on 07/23/2017
(5) 459.51 ft on 05/02/2017
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.

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
If you notice any errors in the below information, please contact our Webmaster
459 Dee Bennet Road is threatened between Ottawa and Utica.
Photos
(1) Starved Rock
(2) Gates at lock and dam September 2010.
(3) Looking upstream. September 2010.
About This Location Collapse

Latitude: 41.324722° N, Longitude: 88.983889° W, Horizontal Datum: NAD83/WGS84

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 Not Available Not Available Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps
NGVD 29 Not Available Not Available Older USGS topographic maps, NGVD29 benchmarks
MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks
Other 0 ft 450 ft  

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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Hydrologic Resources Additional Resources
Collaborative Agencies Collapse
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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