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Hydrograph River at a Glance Download
Illinois River at Starved Rock Lock (tailwater) Tailwater (ft)Flow (kcfs)Highest Observation: 463.98 ft at 8:30PM May 20, 2020Observed: 463.92 ft at 9:00PM May 20, 2020Observed: 463.87 ft at 9:30PM May 20, 2020Observed: 463.82 ft at 10:00PM May 20, 2020Observed: 463.77 ft at 10:30PM May 20, 2020Observed: 463.7 ft at 11:00PM May 20, 2020Observed: 463.66 ft at 11:30PM May 20, 2020Observed: 463.6 ft at 12:00AM May 21, 2020Observed: 463.54 ft at 12:30AM May 21, 2020Observed: 463.49 ft at 1:00AM May 21, 2020Observed: 463.43 ft at 1:30AM May 21, 2020Observed: 463.38 ft at 2:00AM May 21, 2020Observed: 463.33 ft at 2:30AM May 21, 2020Observed: 463.28 ft at 3:00AM May 21, 2020Observed: 463.22 ft at 3:30AM May 21, 2020Observed: 463.17 ft at 4:00AM May 21, 2020Observed: 463.12 ft at 4:30AM May 21, 2020Observed: 463.07 ft at 5:00AM May 21, 2020Observed: 463.02 ft at 5:30AM May 21, 2020Observed: 462.96 ft at 6:00AM May 21, 2020Observed: 462.9 ft at 6:30AM May 21, 2020Observed: 462.86 ft at 7:00AM May 21, 2020Observed: 462.8 ft at 7:30AM May 21, 2020Observed: 462.75 ft at 8:00AM May 21, 2020Observed: 462.7 ft at 8:30AM May 21, 2020Observed: 462.65 ft at 9:00AM May 21, 2020Observed: 462.61 ft at 9:30AM May 21, 2020Observed: 462.56 ft at 10:00AM May 21, 2020Observed: 462.52 ft at 10:30AM May 21, 2020Observed: 462.47 ft at 11:00AM May 21, 2020Observed: 462.42 ft at 11:30AM May 21, 2020Observed: 462.38 ft at 12:00PM May 21, 2020Observed: 462.33 ft at 12:30PM May 21, 2020Observed: 462.28 ft at 1:00PM May 21, 2020Observed: 462.23 ft at 1:30PM May 21, 2020Observed: 462.19 ft at 2:00PM May 21, 2020Observed: 462.15 ft at 2:30PM May 21, 2020Observed: 462.09 ft at 3:00PM May 21, 2020Observed: 462.06 ft at 3:30PM May 21, 2020Observed: 462.01 ft at 4:00PM May 21, 2020Observed: 461.98 ft at 4:30PM May 21, 2020Observed: 461.94 ft at 5:00PM May 21, 2020Observed: 461.89 ft at 5:30PM May 21, 2020Observed: 461.85 ft at 6:00PM May 21, 2020Observed: 461.8 ft at 6:30PM May 21, 2020Observed: 461.77 ft at 7:00PM May 21, 2020Observed: 461.73 ft at 7:30PM May 21, 2020Observed: 461.67 ft at 8:00PM May 21, 2020Observed: 461.64 ft at 8:30PM May 21, 2020Observed: 461.61 ft at 9:00PM May 21, 2020Observed: 461.58 ft at 9:30PM May 21, 2020Observed: 461.53 ft at 10:00PM May 21, 2020Observed: 461.48 ft at 10:30PM May 21, 2020Observed: 461.45 ft at 11:00PM May 21, 2020Observed: 461.39 ft at 11:30PM May 21, 2020Observed: 461.37 ft at 12:00AM May 22, 2020Observed: 461.32 ft at 12:30AM May 22, 2020Observed: 461.3 ft at 1:00AM May 22, 2020Observed: 461.27 ft at 1:30AM May 22, 2020Observed: 461.22 ft at 2:00AM May 22, 2020Observed: 461.2 ft at 2:30AM May 22, 2020Observed: 461.15 ft at 3:00AM May 22, 2020Observed: 461.12 ft at 3:30AM May 22, 2020Observed: 461.08 ft at 4:00AM May 22, 2020Observed: 461.04 ft at 4:30AM May 22, 2020Observed: 461.01 ft at 5:00AM May 22, 2020Observed: 460.97 ft at 5:30AM May 22, 2020Observed: 460.91 ft at 6:00AM May 22, 2020Observed: 460.88 ft at 6:30AM May 22, 2020Observed: 460.84 ft at 7:00AM May 22, 2020Observed: 460.82 ft at 7:30AM May 22, 2020Observed: 460.79 ft at 8:00AM May 22, 2020Observed: 460.78 ft at 8:30AM May 22, 2020Observed: 460.72 ft at 9:00AM May 22, 2020Observed: 460.68 ft at 9:30AM May 22, 2020Observed: 460.67 ft at 10:00AM May 22, 2020Observed: 460.62 ft at 10:30AM May 22, 2020Observed: 460.59 ft at 11:00AM May 22, 2020Observed: 460.55 ft at 11:30AM May 22, 2020Observed: 460.52 ft at 12:00PM May 22, 2020Observed: 460.49 ft at 12:30PM May 22, 2020Observed: 460.46 ft at 1:00PM May 22, 2020Observed: 460.43 ft at 1:30PM May 22, 2020Observed: 460.39 ft at 2:00PM May 22, 2020Observed: 460.37 ft at 2:30PM May 22, 2020Observed: 460.34 ft at 3:00PM May 22, 2020Observed: 460.32 ft at 3:30PM May 22, 2020Observed: 460.28 ft at 4:00PM May 22, 2020Observed: 460.24 ft at 4:30PM May 22, 2020Observed: 460.23 ft at 5:00PM May 22, 2020Observed: 460.2 ft at 5:30PM May 22, 2020Observed: 460.17 ft at 6:00PM May 22, 2020Observed: 460.14 ft at 6:30PM May 22, 2020Observed: 460.11 ft at 7:00PM May 22, 2020Observed: 460.08 ft at 7:30PM May 22, 2020Observed: 460.05 ft at 8:00PM May 22, 2020Observed: 460.02 ft at 8:30PM May 22, 2020Observed: 460 ft at 9:00PM May 22, 2020Observed: 459.98 ft at 9:30PM May 22, 2020Observed: 459.94 ft at 10:00PM May 22, 2020Observed: 459.92 ft at 10:30PM May 22, 2020Observed: 459.89 ft at 11:00PM May 22, 2020Observed: 459.88 ft at 11:30PM May 22, 2020Observed: 459.85 ft at 12:00AM May 23, 2020Observed: 459.82 ft at 12:30AM May 23, 2020Observed: 459.81 ft at 1:00AM May 23, 2020Observed: 459.76 ft at 1:30AM May 23, 2020Observed: 459.76 ft at 2:00AM May 23, 2020Observed: 459.74 ft at 2:30AM May 23, 2020Observed: 459.7 ft at 3:00AM May 23, 2020Observed: 459.69 ft at 3:30AM May 23, 2020Observed: 459.65 ft at 4:00AM May 23, 2020Observed: 459.64 ft at 4:30AM May 23, 2020Observed: 459.62 ft at 5:00AM May 23, 2020Observed: 459.58 ft at 5:30AM May 23, 2020Observed: 459.58 ft at 6:00AM May 23, 2020Observed: 459.55 ft at 6:30AM May 23, 2020Observed: 459.55 ft at 7:00AM May 23, 2020Observed: 459.51 ft at 7:30AM May 23, 2020Observed: 459.48 ft at 8:00AM May 23, 2020Observed: 459.45 ft at 8:30AM May 23, 2020Observed: 459.42 ft at 9:00AM May 23, 2020Observed: 459.4 ft at 9:30AM May 23, 2020Observed: 459.39 ft at 10:00AM May 23, 2020Observed: 459.34 ft at 10:30AM May 23, 2020Observed: 459.34 ft at 11:00AM May 23, 2020Observed: 459.33 ft at 11:30AM May 23, 2020Observed: 459.28 ft at 12:00PM May 23, 2020Observed: 459.27 ft at 12:30PM May 23, 2020Observed: 459.25 ft at 1:00PM May 23, 2020Observed: 459.23 ft at 1:30PM May 23, 2020Observed: 459.22 ft at 2:00PM May 23, 2020Observed: 459.2 ft at 2:30PM May 23, 2020Observed: 459.2 ft at 3:00PM May 23, 2020Observed: 459.17 ft at 3:30PM May 23, 2020Observed: 459.19 ft at 4:00PM May 23, 2020Observed: 459.17 ft at 4:30PM May 23, 2020Observed: 459.17 ft at 5:00PM May 23, 2020Observed: 459.16 ft at 5:30PM May 23, 2020Observed: 459.17 ft at 6:00PM May 23, 2020Observed: 459.15 ft at 6:30PM May 23, 2020Observed: 459.16 ft at 7:00PM May 23, 2020Observed: 459.15 ft at 7:30PM May 23, 2020Observed: 459.13 ft at 8:00PM May 23, 2020Observed: 459.12 ft at 8:30PM May 23, 2020Observed: 459.1 ft at 9:00PM May 23, 2020Observed: 459.07 ft at 9:30PM May 23, 2020Observed: 459.05 ft at 10:00PM May 23, 2020Observed: 459.03 ft at 10:30PM May 23, 2020Observed: 459.02 ft at 11:00PM May 23, 2020Observed: 459 ft at 11:30PM May 23, 2020Observed: 458.97 ft at 12:00AM May 24, 2020Observed: 458.97 ft at 12:30AM May 24, 2020Observed: 458.93 ft at 1:00AM May 24, 2020Observed: 458.93 ft at 1:30AM May 24, 2020Observed: 458.91 ft at 2:00AM May 24, 2020Observed: 458.9 ft at 2:30AM May 24, 2020Observed: 458.87 ft at 3:00AM May 24, 2020Observed: 458.86 ft at 3:30AM May 24, 2020Observed: 458.86 ft at 4:00AM May 24, 2020Observed: 458.86 ft at 4:30AM May 24, 2020Observed: 458.86 ft at 5:00AM May 24, 2020Observed: 458.87 ft at 5:30AM May 24, 2020Observed: 458.86 ft at 6:00AM May 24, 2020Observed: 458.85 ft at 6:30AM May 24, 2020Observed: 458.86 ft at 7:00AM May 24, 2020Observed: 458.85 ft at 7:30AM May 24, 2020Observed: 458.83 ft at 8:00AM May 24, 2020Observed: 458.83 ft at 8:30AM May 24, 2020Observed: 458.82 ft at 9:00AM May 24, 2020Observed: 458.83 ft at 9:30AM May 24, 2020Observed: 458.81 ft at 10:00AM May 24, 2020Observed: 458.84 ft at 10:30AM May 24, 2020Observed: 458.83 ft at 11:00AM May 24, 2020Observed: 458.82 ft at 11:30AM May 24, 2020Observed: 458.81 ft at 12:00PM May 24, 2020Observed: 458.81 ft at 12:30PM May 24, 2020Observed: 458.82 ft at 1:00PM May 24, 2020Observed: 458.81 ft at 1:30PM May 24, 2020Observed: 458.8 ft at 2:00PM May 24, 2020Observed: 458.81 ft at 2:30PM May 24, 2020Observed: 458.8 ft at 3:00PM May 24, 2020Observed: 458.78 ft at 3:30PM May 24, 2020Observed: 458.77 ft at 4:00PM May 24, 2020Observed: 458.77 ft at 4:30PM May 24, 2020Observed: 458.76 ft at 5:00PM May 24, 2020Observed: 458.76 ft at 5:30PM May 24, 2020Observed: 458.75 ft at 6:00PM May 24, 2020Observed: 458.75 ft at 6:30PM May 24, 2020Observed: 458.73 ft at 7:00PM May 24, 2020Observed: 458.73 ft at 7:30PM May 24, 2020Observed: 458.73 ft at 8:00PM May 24, 2020Observed: 458.74 ft at 8:30PM May 24, 2020Observed: 458.71 ft at 9:00PM May 24, 2020Observed: 458.71 ft at 9:30PM May 24, 2020Observed: 458.69 ft at 10:00PM May 24, 2020Observed: 458.68 ft at 10:30PM May 24, 2020Observed: 458.67 ft at 11:00PM May 24, 2020Observed: 458.66 ft at 11:30PM May 24, 2020Observed: 458.65 ft at 12:00AM May 25, 2020Observed: 458.62 ft at 12:30AM May 25, 2020Observed: 458.62 ft at 1:00AM May 25, 2020Observed: 458.6 ft at 1:30AM May 25, 2020Observed: 458.59 ft at 2:00AM May 25, 2020Observed: 458.59 ft at 2:30AM May 25, 2020Observed: 458.57 ft at 3:00AM May 25, 2020Observed: 458.56 ft at 3:30AM May 25, 2020Observed: 458.55 ft at 4:00AM May 25, 2020Observed: 458.54 ft at 4:30AM May 25, 2020Observed: 458.52 ft at 5:00AM May 25, 2020Observed: 458.5 ft at 5:30AM May 25, 2020Observed: 458.48 ft at 6:00AM May 25, 2020Observed: 458.48 ft at 6:30AM May 25, 2020Observed: 458.46 ft at 7:00AM May 25, 2020Observed: 458.43 ft at 7:30AM May 25, 2020Observed: 458.42 ft at 8:00AM May 25, 2020Observed: 458.38 ft at 8:30AM May 25, 2020Observed: 458.37 ft at 9:00AM May 25, 2020Observed: 458.35 ft at 9:30AM May 25, 2020Observed: 458.32 ft at 10:00AM May 25, 2020Observed: 458.31 ft at 10:30AM May 25, 2020Observed: 458.27 ft at 11:00AM May 25, 2020Observed: 458.27 ft at 11:30AM May 25, 2020Observed: 458.23 ft at 12:00PM May 25, 2020Observed: 458.21 ft at 12:30PM May 25, 2020Observed: 458.18 ft at 1:00PM May 25, 2020Observed: 458.15 ft at 1:30PM May 25, 2020Observed: 458.16 ft at 2:00PM May 25, 2020Observed: 458.09 ft at 2:30PM May 25, 2020Observed: 458.08 ft at 3:00PM May 25, 2020Observed: 458.07 ft at 3:30PM May 25, 2020Observed: 458.07 ft at 4:00PM May 25, 2020Observed: 458.01 ft at 4:30PM May 25, 2020Observed: 458 ft at 5:00PM May 25, 2020Observed: 458 ft at 5:30PM May 25, 2020Observed: 457.99 ft at 6:00PM May 25, 2020Observed: 457.96 ft at 6:30PM May 25, 2020Observed: 457.97 ft at 7:00PM May 25, 2020Observed: 457.97 ft at 7:30PM May 25, 2020Observed: 457.94 ft at 8:00PM May 25, 2020Observed: 457.92 ft at 8:30PM May 25, 2020Observed: 457.85 ft at 9:00PM May 25, 2020Observed: 457.87 ft at 9:30PM May 25, 2020Observed: 457.85 ft at 10:00PM May 25, 2020Observed: 457.84 ft at 10:30PM May 25, 2020Observed: 457.82 ft at 11:00PM May 25, 2020Observed: 457.82 ft at 11:30PM May 25, 2020Observed: 457.78 ft at 12:00AM May 26, 2020Observed: 457.79 ft at 12:30AM May 26, 2020Observed: 457.76 ft at 1:00AM May 26, 2020Observed: 457.75 ft at 1:30AM May 26, 2020Observed: 457.74 ft at 2:00AM May 26, 2020Observed: 457.73 ft at 2:30AM May 26, 2020Observed: 457.73 ft at 3:00AM May 26, 2020Observed: 457.6 ft at 3:30AM May 26, 2020Observed: 457.61 ft at 4:00AM May 26, 2020Observed: 457.59 ft at 4:30AM May 26, 2020Observed: 457.58 ft at 5:00AM May 26, 2020Observed: 457.58 ft at 5:30AM May 26, 2020Observed: 457.56 ft at 6:00AM May 26, 2020Observed: 457.56 ft at 6:30AM May 26, 2020Observed: 457.56 ft at 7:00AM May 26, 2020Observed: 457.55 ft at 7:30AM May 26, 2020Observed: 457.53 ft at 8:00AM May 26, 2020Observed: 457.58 ft at 8:30AM May 26, 2020Observed: 457.5 ft at 9:00AM May 26, 2020Observed: 457.56 ft at 9:30AM May 26, 2020Observed: 457.46 ft at 10:00AM May 26, 2020Observed: 457.48 ft at 10:30AM May 26, 2020Observed: 457.46 ft at 11:00AM May 26, 2020Observed: 457.47 ft at 11:30AM May 26, 2020Observed: 457.42 ft at 12:00PM May 26, 2020Observed: 457.43 ft at 12:30PM May 26, 2020Observed: 457.45 ft at 1:00PM May 26, 2020Observed: 457.4 ft at 1:30PM May 26, 2020Observed: 457.38 ft at 2:00PM May 26, 2020Observed: 457.4 ft at 2:30PM May 26, 2020Observed: 457.44 ft at 3:00PM May 26, 2020Observed: 457.33 ft at 3:30PM May 26, 2020Observed: 457.31 ft at 4:00PM May 26, 2020Observed: 457.3 ft at 4:30PM May 26, 2020Observed: 457.28 ft at 5:00PM May 26, 2020Observed: 457.29 ft at 5:30PM May 26, 2020Observed: 457.27 ft at 6:00PM May 26, 2020Observed: 457.27 ft at 6:30PM May 26, 2020Observed: 457.28 ft at 7:00PM May 26, 2020Observed: 457.28 ft at 7:30PM May 26, 2020Observed: 457.26 ft at 8:00PM May 26, 2020Observed: 457.26 ft at 8:30PM May 26, 2020Observed: 457.22 ft at 9:00PM May 26, 2020Observed: 457.22 ft at 9:30PM May 26, 2020Observed: 457.2 ft at 10:00PM May 26, 2020Observed: 457.19 ft at 10:30PM May 26, 2020Observed: 457.18 ft at 11:00PM May 26, 2020Observed: 457.17 ft at 11:30PM May 26, 2020Observed: 457.16 ft at 12:00AM May 27, 2020Observed: 457.14 ft at 12:30AM May 27, 2020Observed: 457.06 ft at 1:00AM May 27, 2020Observed: 457.04 ft at 1:30AM May 27, 2020Observed: 457.03 ft at 2:00AM May 27, 2020Observed: 457.03 ft at 2:30AM May 27, 2020Observed: 456.98 ft at 3:00AM May 27, 2020Observed: 457.01 ft at 3:30AM May 27, 2020Observed: 456.97 ft at 4:00AM May 27, 2020Observed: 456.94 ft at 4:30AM May 27, 2020Observed: 456.94 ft at 5:00AM May 27, 2020Observed: 456.95 ft at 5:30AM May 27, 2020Observed: 456.97 ft at 6:00AM May 27, 2020Observed: 456.97 ft at 6:30AM May 27, 2020Observed: 456.84 ft at 7:00AM May 27, 2020Observed: 456.94 ft at 7:30AM May 27, 2020Observed: 456.9 ft at 8:00AM May 27, 2020Observed: 456.86 ft at 8:30AM May 27, 2020Observed: 456.86 ft at 9:00AM May 27, 2020Observed: 456.74 ft at 9:30AM May 27, 2020Observed: 456.71 ft at 10:00AM May 27, 2020Observed: 456.74 ft at 10:30AM May 27, 2020Observed: 456.73 ft at 11:00AM May 27, 2020Observed: 456.74 ft at 11:30AM May 27, 2020Observed: 456.65 ft at 12:00PM May 27, 2020Observed: 456.67 ft at 12:30PM May 27, 2020Observed: 456.74 ft at 1:00PM May 27, 2020Observed: 456.62 ft at 1:30PM May 27, 2020Observed: 456.63 ft at 2:00PM May 27, 2020Observed: 456.69 ft at 2:30PM May 27, 2020Observed: 456.58 ft at 3:00PM May 27, 2020Observed: 456.6 ft at 3:30PM May 27, 2020Observed: 456.57 ft at 4:00PM May 27, 2020Observed: 456.59 ft at 4:30PM May 27, 2020Observed: 456.56 ft at 5:00PM May 27, 2020Observed: 456.53 ft at 5:30PM May 27, 2020Observed: 456.53 ft at 6:00PM May 27, 2020Observed: 456.43 ft at 6:30PM May 27, 2020Observed: 456.51 ft at 7:00PM May 27, 2020Highest Forecast: 456.5 ft 1:00AM May 28, 2020Forecast: 456.3 ft 7:00AM May 28, 2020Forecast: 456.1 ft 1:00PM May 28, 2020Forecast: 455.9 ft 7:00PM May 28, 2020Forecast: 455.7 ft 1:00AM May 29, 2020Forecast: 455.6 ft 7:00AM May 29, 2020Forecast: 455.4 ft 1:00PM May 29, 2020Forecast: 455.2 ft 7:00PM May 29, 2020Forecast: 455 ft 1:00AM May 30, 2020Forecast: 454.8 ft 7:00AM May 30, 2020Forecast: 454.6 ft 1:00PM May 30, 2020Forecast: 454.5 ft 7:00PM May 30, 2020Forecast: 454.3 ft 1:00AM May 31, 2020Forecast: 454.1 ft 7:00AM May 31, 2020Forecast: 453.9 ft 1:00PM May 31, 2020Forecast: 453.8 ft 7:00PM May 31, 2020Forecast: 453.6 ft 1:00AM Jun 01, 2020Forecast: 453.4 ft 7:00AM Jun 01, 2020Forecast: 453.2 ft 1:00PM Jun 01, 2020Forecast: 453.1 ft 7:00PM Jun 01, 2020Forecast: 452.9 ft 1:00AM Jun 02, 2020Forecast: 452.8 ft 7:00AM Jun 02, 2020Forecast: 452.6 ft 1:00PM Jun 02, 2020Forecast: 452.5 ft 7:00PM Jun 02, 2020Forecast: 452.3 ft 1:00AM Jun 03, 2020Forecast: 452.2 ft 7:00AM Jun 03, 2020USACESRDI2(plotting HTIRG) Graph Created (8:24PM May 27, 2020)ObservedForecast (issued 10:13AM May 27)Latest observed value: 456.51 ft at 7:00 PM CDT 27-May-2020. 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 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.

Return to Area Map
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: 449
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
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.
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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