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"flow": 226600, "preliminary": "O", "olddatum": false }, { "occurredTime": "1998-04-17T00:00:00Z", "stage": 32.4, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1997-04-22T00:00:00Z", "stage": 30, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1996-05-30T00:00:00Z", "stage": 32.7, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1995-05-19T00:00:00Z", "stage": 31.4, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1993-07-29T09:00:00Z", "stage": 37.73, "flow": 0, "preliminary": "R", "olddatum": false }, { "occurredTime": "1993-04-25T00:00:00Z", "stage": 32.2, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1991-05-08T00:00:00Z", "stage": 27.7, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1990-06-24T00:00:00Z", "stage": 30.5, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1986-10-05T00:00:00Z", "stage": 33.7, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1986-05-21T00:00:00Z", "stage": 30.8, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1985-11-20T00:00:00Z", "stage": 26.6, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1985-03-07T00:00:00Z", "stage": 31.5, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1984-07-01T00:00:00Z", "stage": 28.3, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1984-05-06T00:00:00Z", "stage": 27.9, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1983-04-06T00:00:00Z", "stage": 33.24, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1982-12-05T00:00:00Z", "stage": 30.4, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1982-04-20T00:00:00Z", "stage": 29.4, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1981-07-07T00:00:00Z", "stage": 27.6, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1981-05-20T00:00:00Z", "stage": 26, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1979-04-13T00:00:00Z", "stage": 32.44, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1976-04-28T00:00:00Z", "stage": 30.72, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1974-05-23T00:00:00Z", "stage": 31.32, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1973-04-24T00:00:00Z", "stage": 36.76, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1965-05-01T00:00:00Z", "stage": 32.2, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1960-04-08T00:00:00Z", "stage": 31.21, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1948-03-24T00:00:00Z", "stage": 30.51, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1947-06-22T00:00:00Z", "stage": 32.53, "flow": 0, "preliminary": "O", "olddatum": false } ] }, "lowWaters": { "historic": [] }, "impacts": [ { "stage": 153000, "statement": "This flow is approximately where CLKM7 goes to \"open river\" conditions." }, { "stage": 38.1, "statement": "Sny Island Cell #4 levee is overtopped." }, { "stage": 37.1, "statement": "Sny Island Cell #3 levee is overtopped." }, { "stage": 36.25, "statement": "Highway 79 is closed from one mile south of Annada to two miles north of Annada. Route H is closed from Annada to about one mile west of Annada." }, { "stage": 36, "statement": "Near this height, the top of the sewage treatment lagoon just south of town is overtopped." }, { "stage": 35, "statement": "Near this height, the lock wall at Lock 24 is inundated." }, { "stage": 34, "statement": "Route W (Kentucky Street) is closed for one block between Third Street and Highway 79. Also, near this height, the living areas of homes in the Port Marmac area begin flooding." }, { "stage": 33, "statement": "Clarksville city businesses from 1st Street to 3rd Street begin to flood." }, { "stage": 32.79, "statement": "IL route 96 from near Mozier to County Road 2 inundated and closed near this height." }, { "stage": 32.5, "statement": "Near this level, the lock is closed to navigation." }, { "stage": 32.29, "statement": "Route N is closed between Route D and Highway 79." }, { "stage": 32, "statement": "Front Street begins to flood." }, { "stage": 31.5, "statement": "Burlington Northern SF railroad tracks begin to flood. Also, Highway 79 is closed about a mile south of Clarksville." }, { "stage": 31, "statement": "The Clarksville Boat Club, south of Lock & Dam 24, begins to flood. First Street begins flooding. A sand-filled barrier at the bottom of Howard Street is considered. In Hamburg, Illinois, Water Street floods." }, { "stage": 30.8, "statement": "Near this height, Highway 79 is closed from Route N to about a mile northwest of that intersection." }, { "stage": 30, "statement": "East bank (Illinois side) begins to flood." }, { "stage": 29, "statement": "Water enters the parking lot entrance at the Clarksville Riverfront Park." }, { "stage": 27.2, "statement": "Silo Park just northwest of Clarksville off Highway 79 begins flooding." }, { "stage": 25.5, "statement": "State Route P east of Elsberry begins flooding just east of the levee." }, { "stage": 25.3, "statement": "The road to Port Marmac, a riverside community of about 13 homes just south of Clarksville, begins flooding." }, { "stage": 23.5, "statement": "Flooding begins in unprotected areas." }, { "stage": 23, "statement": "At this approximate stage, the Corps will take gates out of the river, creating \"open river\" conditions. This corresponds to an approximate stage of 155,000 cfs." } ] }, "images": { "probability": { "weekint": { "stage": "https://water.noaa.gov/resources/probabilistic/exceedance/CLKM7.SSTG.prob.weekint.gif", "flow": "https://water.noaa.gov/resources/probabilistic/exceedance/CLKM7.QINE.prob.weekint.gif", "volume": "https://water.noaa.gov/resources/probabilistic/exceedance/CLKM7.volume.prob.weekint.gif" }, "entperiod": { "stage": "https://water.noaa.gov/resources/probabilistic/exceedance/CLKM7.SSTG.exceed.90day.gif", "flow": "https://water.noaa.gov/resources/probabilistic/exceedance/CLKM7.QINE.exceed.90day.gif", "volume": "https://water.noaa.gov/resources/probabilistic/exceedance/CLKM7.volume.exceed.90day.gif" }, "shortrange": "https://water.noaa.gov/resources/probabilistic/short_term/CLKM7.shortrange.hefs.png" }, "hydrograph": { "default": "https://water.noaa.gov/resources/hydrographs/clkm7_hg.png", "floodcat": "https://water.noaa.gov/resources/hydrographs/clkm7_record.png" }, "photos": [ { "id": "3594180812153491950", "type": "Feature", "geometry": { "type": "Point", "coordinates": [ 39.373333333333, -90.904722222222 ] }, "properties": { "image": "https://water.noaa.gov/resources/photos/clkm7/3594180812153491950.jpeg", "caption": "Aerial View" } }, { "id": "3600273377881690606", "type": "Feature", "geometry": { "type": "Point", "coordinates": [ 39.373333333333, -90.904722222222 ] }, "properties": { "image": "https://water.noaa.gov/resources/photos/clkm7/3600273377881690606.jpeg", "caption": "Intersection of Highway 79 and W on May 17, 2001 at 34.5 feet." } }, { "id": "3606168495373357550", "type": "Feature", "geometry": { "type": "Point", "coordinates": [ 39.373333333333, -90.904722222222 ] }, "properties": { "image": "https://water.noaa.gov/resources/photos/clkm7/3606168495373357550.jpeg", "caption": "Main Street at 1st Street on May 17, 2001 at a stage of 34.4 ft." } }, { "id": "3612700754083516910", "type": "Feature", "geometry": { "type": "Point", "coordinates": [ 39.373333333333, -90.904722222222 ] }, "properties": { "image": "https://water.noaa.gov/resources/photos/clkm7/3612700754083516910.jpeg", "caption": "Howard Street on May 17, 2001 at a stage of 34.5 feet." } }, { "id": "7441152898575241710", "type": "Feature", "geometry": { "type": "Point", "coordinates": [ 39.373333333333, -90.904722222222 ] }, "properties": { "image": "https://water.noaa.gov/resources/photos/clkm7/7441152898575241710.jpeg", "caption": "Along Wilber Street on 22 June 2008 at a stage of 36.5 feet." } }, { "id": "7457485125898605038", "type": "Feature", "geometry": { "type": "Point", "coordinates": [ 39.373333333333, -90.904722222222 ] }, "properties": { "image": "https://water.noaa.gov/resources/photos/clkm7/7457485125898605038.jpeg", "caption": "Clarksville along Highway 79 (2nd Street) on 22 June 2008 with a stage of 36.5 feet." } }, { "id": "7473818422668825070", "type": "Feature", "geometry": { "type": "Point", "coordinates": [ 39.373333333333, -90.904722222222 ] }, "properties": { "image": "https://water.noaa.gov/resources/photos/clkm7/7473818422668825070.jpeg", "caption": "Along Wilber Street at 3rd Street with a stage of 36.5 feet on 22 June 2008." } }, { "id": "7492655324595360238", "type": "Feature", "geometry": { "type": "Point", "coordinates": [ 39.373333333333, -90.904722222222 ] }, "properties": { "image": "https://water.noaa.gov/resources/photos/clkm7/7492655324595360238.jpeg", "caption": "Tennessee and 3rd Streets on 22 June 2008 with a stage of 36.5 feet." } }, { "id": "7509182092462395886", "type": "Feature", "geometry": { "type": "Point", "coordinates": [ 39.373333333333, -90.904722222222 ] }, "properties": { "image": "https://water.noaa.gov/resources/photos/clkm7/7509182092462395886.jpeg", "caption": "Kentuckty Street near Highway 79 with a stage of 36.5 feet on 22 June 2008." } }, { "id": "7995806860671324654", "type": "Feature", "geometry": { "type": "Point", "coordinates": [ 39.373333333333, -90.904722222222 ] }, "properties": { "image": "https://water.noaa.gov/resources/photos/clkm7/7995806860671324654.jpeg", "caption": "Clarksville riverfront on 22 June 2008 at 36.5 feet." } }, { "id": "8014055029955760622", "type": "Feature", "geometry": { "type": "Point", "coordinates": [ 39.373333333333, -90.904722222222 ] }, "properties": { "image": "https://water.noaa.gov/resources/photos/clkm7/8014055029955760622.jpeg", "caption": "Tennessee Street near 3rd Street on 22 June 2008 with a stage of 36.5 feet." } }, { "id": "8213369150604710382", "type": "Feature", "geometry": { "type": "Point", "coordinates": [ 39.373333333333, -90.904722222222 ] }, "properties": { "image": "https://water.noaa.gov/resources/photos/clkm7/8213369150604710382.jpeg", "caption": "Lock and Dam tailwater instruments on June 22, 2010 at a stage of 36.5 feet." } }, { "id": "8229922061937676782", "type": "Feature", "geometry": { "type": "Point", "coordinates": [ 39.373333333333, -90.904722222222 ] }, "properties": { "image": "https://water.noaa.gov/resources/photos/clkm7/8229922061937676782.jpeg", "caption": "Clarksville Boat House flooding on June 25, 2010 at a stage of 31.34 feet." } }, { "id": "8641240789133955566", "type": "Feature", "geometry": { "type": "Point", "coordinates": [ 39.373333333333, -90.904722222222 ] }, "properties": { "image": "https://water.noaa.gov/resources/photos/clkm7/8641240789133955566.jpeg", "caption": "Highway P near Elsberry on May 19, 2009 at 29.8 ft." } }, { "id": "8658345131318055406", "type": "Feature", "geometry": { "type": "Point", "coordinates": [ 39.373333333333, -90.904722222222 ] }, "properties": { "image": "https://water.noaa.gov/resources/photos/clkm7/8658345131318055406.jpeg", "caption": "Lock and Dam 24 control center on June 22, 2008 at a stage of 36.5 feet." } }, { "id": "12514342979843002862", "type": "Feature", "geometry": { "type": "Point", "coordinates": [ 39.373333333333, -90.904722222222 ] }, "properties": { "image": "https://water.noaa.gov/resources/photos/clkm7/12514342979843002862.jpeg", "caption": "Parking area at the Clarksville Riverfront Park on June 25, 2010 at a stage of 31.34 feet." } }, { "id": "12531536584332415470", "type": "Feature", "geometry": { "type": "Point", "coordinates": [ 39.373333333333, -90.904722222222 ] }, "properties": { "image": "https://water.noaa.gov/resources/photos/clkm7/12531536584332415470.jpeg", "caption": "1st Street in Clarksville on June 25, 2010 at a stage of 31.34 feet." } }, { "id": "12548892706089341422", "type": "Feature", "geometry": { "type": "Point", "coordinates": [ 39.373333333333, -90.904722222222 ] }, "properties": { "image": "https://water.noaa.gov/resources/photos/clkm7/12548892706089341422.jpeg", "caption": "Highway 79 about 1.6 miles south of Clarksville on June 25, 2010 at 31.34 ft." } } ] }, "dataAttribution": [ { "abbrev": "U.S. Army Corps of Engineers", "text": "Rivergages.com", "title": "U.S. Army Corps of Engineers", "url": "https://rivergages.mvr.usace.army.mil/WaterControl/new/layout.cfm" }, { "abbrev": "U.S. Army Corps of Engineers", "text": "Click here for more information from USACE-St. Louis District", "title": "US Army Corps of Engineers", "url": "https://www.mvs-wc.mvs.usace.army.mil" } ], "impactsLowWaters": [], "normalThreshold": null, "hydronotes": [ { "statement": "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.", "effective": "0401", "expiration": "0929" }, { "statement": "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.", "effective": "0930", "expiration": "0331" }, { "statement": "For the latest navigation status update from the U.S. Army Corps of Engineers-St. Louis District, click here.", "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": 421.59 } ] }, "horizontal": { "value": [] }, "notes": { "value": [] } }, "inundation": { "enabled": false, "url": "", "zeroDatum": null, "downloads": null, "siteSpecificInfo": "", "dataAttribution": [] }, "upstreamLid": "LUSM7", "downstreamLid": "MOZI2", "inService": { "enabled": true, "message": "" }, "lowThreshold": null, "forecastReliability": "Forecasts are issued routinely year-round.", "TruncateObs": "-1", "TruncateFcst": "-1", "ObservedFloodCategory": "no_flooding", "ForecastFloodCategory": "no_flooding" }