{ "lid": "RVRI2", "usgsId": "05532500", "reachId": "14786231", "name": "Des Plaines River at Riverside", "description": "", "rfc": { "abbreviation": "NCRFC", "name": "North Central River Forecast Center" }, "wfo": { "abbreviation": "LOT", "name": "Romeoville" }, "state": { "abbreviation": "IL", "name": "Illinois" }, "county": "Cook", "timeZone": "CST6CDT", "latitude": 41.821666666667, "longitude": -87.821944444444, "pedts": { "observed": "HGIRG", "forecast": "HGIFF" }, "status": { "observed": { "primary": 2.86, "primaryUnit": "ft", "secondary": 0.605, "secondaryUnit": "kcfs", "floodCategory": "no_flooding", "validTime": "2026-10-13T03:45:00Z" }, "forecast": { "primary": -999, "primaryUnit": "", "secondary": -999, "secondaryUnit": "", "floodCategory": "fcst_not_current", "validTime": "0001-01-01T00:00:00Z" } }, "flood": { "stageUnits": "ft", "flowUnits": "cfs", "categories": { "major": { "stage": 9, "flow": -9999 }, "moderate": { "stage": 8, "flow": -9999 }, "minor": { "stage": 7.5, 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8.890000000000002, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1957-07-14T00:00:00Z", "stage": 8, "flow": 5950, "preliminary": "O", "olddatum": false }, { "occurredTime": "1954-10-11T00:00:00Z", "stage": 8.15, "flow": 6340, "preliminary": "O", "olddatum": false }, { "occurredTime": "1954-04-26T00:00:00Z", "stage": 6.78, "flow": 3980, "preliminary": "O", "olddatum": false }, { "occurredTime": "1952-04-15T00:00:00Z", "stage": 6.52, "flow": 3620, "preliminary": "O", "olddatum": false }, { "occurredTime": "1951-02-27T00:00:00Z", "stage": 5.95, "flow": 3100, "preliminary": "O", "olddatum": false }, { "occurredTime": "1950-04-26T00:00:00Z", "stage": 8.15, "flow": 6340, "preliminary": "O", "olddatum": false }, { "occurredTime": "1948-03-20T00:00:00Z", "stage": 8.28, "flow": 6510, "preliminary": "O", "olddatum": false }, { "occurredTime": "1947-04-06T00:00:00Z", "stage": 6.85, "flow": 3780, "preliminary": "O", "olddatum": false }, { "occurredTime": "1946-03-07T00:00:00Z", "stage": 6.44, "flow": 3370, "preliminary": "O", "olddatum": false }, { "occurredTime": "1945-05-17T00:00:00Z", "stage": 6.7, "flow": 3670, "preliminary": "O", "olddatum": false }, { "occurredTime": "1944-03-16T00:00:00Z", "stage": 7.4, "flow": 4480, "preliminary": "O", "olddatum": false } ] }, "lowWaters": { "historic": [] }, "impacts": [ { "stage": 13.5, "statement": "Water reaches the top of the west bank levees in Lyons and McCook." }, { "stage": 12, "statement": "Water reaches the top of the levees in Lyons and McCook." }, { "stage": 11.5, "statement": "Widespread inundation of industrial property and structures north of the river in McCook. Numerous residences threatened near the river in Lyons." }, { "stage": 11, "statement": "Structures threatened at Brookfield Zoo." }, { "stage": 10.5, "statement": "Residences threatened between river and 39th Street in Riverside. Without flood protection from levees, widespread inundation of industrial property and structures would occur north of the river in McCook." }, { "stage": 10, "statement": "US-34 (Ogden Avenue) threatened along the River in Lyons." }, { "stage": 9.5, "statement": "Parking areas at Brookfield Zoo threatened. Industrial parking area near the river and I-55 is threatened." }, { "stage": 9, "statement": "Residences threatened near the confluence of Des Plaines River and Salt Creek." }, { "stage": 8.5, "statement": "IL-171 (1st Avenue) threatened near Brookfield Zoo. Water may begin to overflow into the Chicago Sanitary & Ship Canal near Willow Springs." }, { "stage": 8, "statement": "Park areas are inundated near the confluence of Des Plaines River and Salt Creek." }, { "stage": 7.5, "statement": "Low-lying sections of Miller Meadow, Indian Gardens, Cermak Woods, Ottawa Trail Woods, and other forest land along the river are inundated." }, { "stage": 7, "statement": "Water begins to overflow banks in adjacent forest preserve areas." }, { "stage": 4, "statement": "Without flood protection from levees, water would begin to bypass the main river channel through Chicago Portage toward the Chicago River Basin and areas once covered by Mud Lake." } ] }, "images": { "probability": { "weekint": { "stage": "https://water.noaa.gov/resources/probabilistic/exceedance/RVRI2.SSTG.prob.weekint.gif", "flow": "https://water.noaa.gov/resources/probabilistic/exceedance/RVRI2.QINE.prob.weekint.gif", "volume": "https://water.noaa.gov/resources/probabilistic/exceedance/RVRI2.volume.prob.weekint.gif" }, "entperiod": { "stage": "https://water.noaa.gov/resources/probabilistic/exceedance/RVRI2.SSTG.exceed.90day.gif", "flow": "https://water.noaa.gov/resources/probabilistic/exceedance/RVRI2.QINE.exceed.90day.gif", "volume": "https://water.noaa.gov/resources/probabilistic/exceedance/RVRI2.volume.exceed.90day.gif" }, "shortrange": "https://water.noaa.gov/resources/probabilistic/short_term/RVRI2.shortrange.hefs.png" }, "hydrograph": { "default": "https://water.noaa.gov/resources/hydrographs/rvri2_hg.png", "floodcat": "https://water.noaa.gov/resources/hydrographs/rvri2_record.png" }, "photos": [] }, "dataAttribution": [ { "abbrev": "US Geological Survey", "text": "USGS--Water Resources of the United States", "title": "US Geological Survey", "url": "https://waterdata.usgs.gov/nwis" }, { "abbrev": "USGS", "text": "05532500", "title": "Observations courtesy of U.S. Geological Survey", "url": "https://waterdata.usgs.gov/nwis/inventory/?site_no=05532500" }, { "abbrev": "COE", "text": "Website", "title": "Observations courtesy of U.S. Army Corps of Engineers", "url": "https://www2.mvr.usace.army.mil/WaterControl/new/layout.cfm" } ], "impactsLowWaters": [ { "value": "1.5", "impact": "Approximate stage of the 1-in-10 annual chance flow (7-day average)." }, { "value": "1.0", "impact": "River nears zero flow." } ], "normalThreshold": null, "hydronotes": [ { "statement": "River forecasts for this location take into account past and future precipitation. The stages/flows that will occur may be different if future rainfall is different than forecast.", "effective": "0101", "expiration": "1231" } ], "datums": { "vertical": { "value": [ { "label": "North American Vertical Datum of 1988", "abbrev": "NAVD88", "description": "A fixed reference for elevations determined by geodetic leveling. The datum was derived from a general adjustment of the first-order terrestrial leveling nets of the United States, Canada, and Mexico. In the adjustment, only the height of the primary tidal bench mark, referenced to the International Great Lakes Datum of 1985 (IGLD 85) local mean sea level height value, at Father Point, Rimouski, Quebec, Canada was held fixed, thus providing minimum constraint. NAVD 88 and IGLD 85 are identical. However, NAVD 88 bench mark values are given in Helmert orthometric height units while IGLD 85 values are in dynamic heights. See International Great Lakes Datum of 1985, National Geodetic Vertical Datum of 1929, and geopotential difference. NAVD 88 should not be used as Mean Sea Level.", "value": 594.38 } ] }, "horizontal": { "value": [] }, "notes": { "value": [] } }, "inundation": { "enabled": false, "url": "", "zeroDatum": null, "downloads": null, "siteSpecificInfo": "", "dataAttribution": [] }, "upstreamLid": "RVFI2", "downstreamLid": "LYNI2", "inService": { "enabled": true, "message": "" }, "lowThreshold": { "units": "ft", "value": 1.5 }, "forecastReliability": "Forecasts are issued as needed during times of high water, but are not routinely available.", "TruncateObs": "-1", "TruncateFcst": "7", "ObservedFloodCategory": "no_flooding", "ForecastFloodCategory": "fcst_not_current" }