{ "lid": "CANM7", "usgsId": "05495150", "reachId": "5803098", "name": "Mississippi River at Canton Lock and Dam 20", "description": "", "rfc": { "abbreviation": "NCRFC", "name": "North Central River Forecast Center" }, "wfo": { "abbreviation": "LSX", "name": "St. Charles" }, "state": { "abbreviation": "MO", "name": "Missouri" }, "county": "Lewis", "timeZone": "CST6CDT", "latitude": 40.142395, "longitude": -91.515031, "pedts": { "observed": "HTIR2", "forecast": "HTIFF" }, "status": { "observed": { "primary": 3.05, "primaryUnit": "ft", "secondary": 40.4, "secondaryUnit": "kcfs", "floodCategory": "no_flooding", "validTime": "2026-08-31T01:30:00Z" }, "forecast": { "primary": 3, "primaryUnit": "ft", "secondary": 39.7, "secondaryUnit": "kcfs", "floodCategory": "no_flooding", "validTime": "2026-08-31T06:00:00Z" } }, "flood": { "stageUnits": "ft", "flowUnits": "cfs", "categories": { "major": { "stage": 25, "flow": -9999 }, "moderate": { "stage": 20, "flow": -9999 }, "minor": { "stage": 15, "flow": -9999 }, "action": { "stage": 13, "flow": -9999 } }, "lro": { "minorCS": "0.11", "moderateCS": "< 0.05", "majorCS": "< 0.05", "producedTime": "2026-08-28T02:02:37Z", "interval": "SON" }, "crests": { "historic": [ { "occurredTime": "1993-07-09T00:00:00Z", "stage": 27.88, "flow": 436886, "preliminary": "R", "olddatum": false }, { "occurredTime": "2008-06-18T11:00:00Z", "stage": 27.73, "flow": 564000, "preliminary": "O", "olddatum": false }, { "occurredTime": "2019-06-02T01:00:00Z", "stage": 27.11, "flow": 534000, "preliminary": "O", "olddatum": false }, { "occurredTime": "1973-04-24T00:00:00Z", "stage": 24.5, "flow": 383934, "preliminary": "O", "olddatum": false }, { "occurredTime": "2014-07-07T15:00:00Z", "stage": 23.43, "flow": 401410, "preliminary": "O", "olddatum": false }, { "occurredTime": "2001-05-15T07:00:00Z", "stage": 23.2, "flow": 362561, "preliminary": "O", "olddatum": false }, { "occurredTime": "2013-04-21T09:00:00Z", "stage": 23.19, "flow": 0, "preliminary": "O", 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"occurredTime": "2007-02-26T00:00:00Z", "stage": 20.19, "flow": 313000, "preliminary": "O", "olddatum": false }, { "occurredTime": "2006-04-17T17:00:00Z", "stage": 12.46, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2005-04-14T14:00:00Z", "stage": 13.2, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2004-06-01T14:00:00Z", "stage": 17.9, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2003-05-26T13:00:00Z", "stage": 14.3, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2002-05-13T07:00:00Z", "stage": 17.1, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2001-06-07T07:00:00Z", "stage": 16.3, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2001-05-15T07:00:00Z", "stage": 23.2, "flow": 362561, "preliminary": "O", "olddatum": false }, { "occurredTime": "2000-06-27T14:00:00Z", "stage": 15.4, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1998-04-15T00:00:00Z", "stage": 19.6, "flow": 304278, "preliminary": "O", "olddatum": false }, { "occurredTime": "1995-05-25T00:00:00Z", "stage": 17.3, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1993-07-09T00:00:00Z", "stage": 27.88, "flow": 436886, "preliminary": "R", "olddatum": false }, { "occurredTime": "1990-06-22T00:00:00Z", "stage": 18.64, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1986-10-04T00:00:00Z", "stage": 20.92, "flow": 326739, "preliminary": "O", "olddatum": false }, { "occurredTime": "1985-03-05T00:00:00Z", "stage": 18, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1984-06-29T00:00:00Z", "stage": 16.35, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1983-04-04T00:00:00Z", "stage": 19.2, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1982-04-18T00:00:00Z", "stage": 17.52, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1979-04-13T00:00:00Z", "stage": 18.49, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1974-05-21T00:00:00Z", "stage": 19.38, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1973-04-24T00:00:00Z", "stage": 24.5, "flow": 383934, "preliminary": "O", "olddatum": false }, { "occurredTime": "1967-04-16T00:00:00Z", "stage": 16.3, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1965-05-01T00:00:00Z", "stage": 21.42, "flow": 334795, "preliminary": "O", "olddatum": false }, { "occurredTime": "1961-04-06T00:00:00Z", "stage": 16.32, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1960-04-03T00:00:00Z", "stage": 20.82, "flow": 325102, "preliminary": "O", "olddatum": false }, { "occurredTime": "1951-05-12T00:00:00Z", "stage": 19.5, "flow": 302499, "preliminary": "O", "olddatum": false }, { "occurredTime": "1947-06-10T00:00:00Z", "stage": 20, "flow": 311284, "preliminary": "O", "olddatum": false } ] }, "lowWaters": { "historic": [] }, "impacts": [ { "stage": 110000, "statement": "At this approximate discharge, the Corps will raise the gates out of the water, creating \"open river\" conditions." }, { "stage": 29.3, "statement": "Water reaches the 12,000 volt transformer pad at Lock 20." }, { "stage": 27, "statement": "Water reaches the top of the lower gates." }, { "stage": 26, "statement": "The Lock and Dam 20 Control Center begins flooding at this height." }, { "stage": 25.7, "statement": "The Illinois levee protecting Meyer, IL is overtopped. The town of Meyer begins flooding." }, { "stage": 24.5, "statement": "Lock and Dam 20 maintenance buildings begin flooding." }, { "stage": 20, "statement": "Flood waters reach the top of the upper gates." }, { "stage": 19.6, "statement": "Water reaches the top of the lock wall, flooding the lock chamber." }, { "stage": 18.1, "statement": "Railroad tracks near the campgrounds begin flooding at this height." }, { "stage": 18, "statement": "Near this level, the lock is closed to navigation. This level will vary with circumstance. Also, the railroad crossing at the east end of Henderson Street floods at this height." }, { "stage": 17.5, "statement": "At this height, the city of Canton will install the flood gates at the railroad opening and at Route B north of town." }, { "stage": 17.3, "statement": "State Highway B, or Business U.S. Highway 61, is closed from Missouri Highway 16 in Canton to north of Canton at the levee flood gate near this level." }, { "stage": 16.6, "statement": "Front Street leading to the campground and Corps park campgrounds flood at this height." }, { "stage": 15.6, "statement": "North Front Street and the first 2-3 campsites in Mississippi Park begin flooding at this height." }, { "stage": 14, "statement": "Both banks begin to overflow." }, { "stage": 9, "statement": "Above 8.7 to 9.2 feet, the Corps will raise the gates out of the water, allowing for \"open river\" conditions. This corresponds to a discharge of approximately 110,000 cfs." }, { "stage": 8.5, "statement": "The Corps will not allow the pool level to drop below 8.5 feet (higher flows below 100K). At low flows, they allow a 2-foot variation between 11.0 and 13.0 feet. At higher flows below 100K, the range is actually lower, between 8.5 and 10.5 feet. Above 110K cfs, the gates are raised above the water surface, allowing open river conditions." } ] }, "images": { "probability": { "weekint": { "stage": "https://water.noaa.gov/resources/probabilistic/exceedance/CANM7.SSTG.prob.weekint.gif", "flow": "https://water.noaa.gov/resources/probabilistic/exceedance/CANM7.QINE.prob.weekint.gif", "volume": "https://water.noaa.gov/resources/probabilistic/exceedance/CANM7.volume.prob.weekint.gif" }, "entperiod": { "stage": "https://water.noaa.gov/resources/probabilistic/exceedance/CANM7.SSTG.exceed.90day.gif", "flow": "https://water.noaa.gov/resources/probabilistic/exceedance/CANM7.QINE.exceed.90day.gif", "volume": "https://water.noaa.gov/resources/probabilistic/exceedance/CANM7.volume.exceed.90day.gif" }, "shortrange": "https://water.noaa.gov/resources/probabilistic/short_term/CANM7.shortrange.hefs.png" }, "hydrograph": { "default": "https://water.noaa.gov/resources/hydrographs/canm7_hg.png", "floodcat": "https://water.noaa.gov/resources/hydrographs/canm7_record.png" }, "photos": [ { "id": "6884141132577444334", "type": "Feature", "geometry": { "type": "Point", "coordinates": [ 40.142395, -91.515031 ] }, "properties": { "image": "https://water.noaa.gov/resources/photos/canm7/6884141132577444334.jpeg", "caption": "Aerial View" } }, { "id": "6890770663706923502", "type": "Feature", "geometry": { "type": "Point", "coordinates": [ 40.142395, -91.515031 ] }, "properties": { "image": "https://water.noaa.gov/resources/photos/canm7/6890770663706923502.jpeg", "caption": "Upstream View" } }, { "id": "6896849111877620206", "type": "Feature", "geometry": { "type": "Point", "coordinates": [ 40.142395, -91.515031 ] }, "properties": { "image": "https://water.noaa.gov/resources/photos/canm7/6896849111877620206.jpeg", "caption": "Downstream View" } }, { "id": "6903583337129906670", "type": "Feature", "geometry": { "type": "Point", "coordinates": [ 40.142395, -91.515031 ] }, "properties": { "image": "https://water.noaa.gov/resources/photos/canm7/6903583337129906670.jpeg", "caption": "Pool View (US from Dam)" } }, { "id": "6910051527812911598", "type": "Feature", "geometry": { "type": "Point", "coordinates": [ 40.142395, -91.515031 ] }, "properties": { "image": "https://water.noaa.gov/resources/photos/canm7/6910051527812911598.jpeg", "caption": "Tailwater Overview" } }, { "id": "6916511695497007598", "type": "Feature", "geometry": { "type": "Point", "coordinates": [ 40.142395, -91.515031 ] }, "properties": { "image": "https://water.noaa.gov/resources/photos/canm7/6916511695497007598.jpeg", "caption": "Tailwater View" } }, { "id": "6172135674883477998", "type": "Feature", "geometry": { "type": "Point", "coordinates": [ 40.142395, -91.515031 ] }, "properties": { "image": "https://water.noaa.gov/resources/photos/canm7/6172135674883477998.jpeg", "caption": "BNSF railroad tracks looking north toward the lock and dam on June 25, 2010 at 18.15 feet." } }, { "id": "7421080295902941678", "type": "Feature", "geometry": { "type": "Point", "coordinates": [ 40.142395, -91.515031 ] }, "properties": { "image": "https://water.noaa.gov/resources/photos/canm7/7421080295902941678.jpeg", "caption": "Flooded farm near Meyer, IL on 19 June 2008 with a stage of 23 feet." } }, { "id": "7430464400012743150", "type": "Feature", "geometry": { "type": "Point", "coordinates": [ 40.142395, -91.515031 ] }, "properties": { "image": "https://water.noaa.gov/resources/photos/canm7/7430464400012743150.jpeg", "caption": "Canton riverfront with a stage of 23.05 on 19 June 2008." } }, { "id": "7883838162776232430", "type": "Feature", "geometry": { "type": "Point", "coordinates": [ 40.142395, -91.515031 ] }, "properties": { "image": "https://water.noaa.gov/resources/photos/canm7/7883838162776232430.jpeg", "caption": "Looking NE at the Canton Lock and Dam 20 on 19 June 2008. HT=23.05 feet." } }, { "id": "7901899664192049646", "type": "Feature", "geometry": { "type": "Point", "coordinates": [ 40.142395, -91.515031 ] }, "properties": { "image": "https://water.noaa.gov/resources/photos/canm7/7901899664192049646.jpeg", "caption": "Canton riverfront on 19 June 2008 with a stage of 23.05 ft." } }, { "id": "7971090389034734062", "type": "Feature", "geometry": { "type": "Point", "coordinates": [ 40.142395, -91.515031 ] }, "properties": { "image": "https://water.noaa.gov/resources/photos/canm7/7971090389034734062.jpeg", "caption": "Levee break on the Illinois side across from Canton, MO on 19 June 2008. Stage was 23 feet." } }, { "id": "10821617066213249518", "type": "Feature", "geometry": { "type": "Point", "coordinates": [ 40.142395, -91.515031 ] }, "properties": { "image": "https://water.noaa.gov/resources/photos/canm7/10821617066213249518.jpeg", "caption": "Flooded parking at Bunge near BNSF tracks in LaGrange on June 25, 2010 with a stage of 18.2 feet." } }, { "id": "10838028668827210222", "type": "Feature", "geometry": { "type": "Point", "coordinates": [ 40.142395, -91.515031 ] }, "properties": { "image": "https://water.noaa.gov/resources/photos/canm7/10838028668827210222.jpeg", "caption": "Front Street leading to campground hookups on June 25, 2010 at a stage of 18.15 feet." } }, { "id": "10853854729959772654", "type": "Feature", "geometry": { "type": "Point", "coordinates": [ 40.142395, -91.515031 ] }, "properties": { "image": "https://water.noaa.gov/resources/photos/canm7/10853854729959772654.jpeg", "caption": "Henderson Street leading to the lock and dam at the railroad crossing on June 25, 2010 at 18.15 feet" } }, { "id": "10869624411056640494", "type": "Feature", "geometry": { "type": "Point", "coordinates": [ 40.142395, -91.515031 ] }, "properties": { "image": "https://water.noaa.gov/resources/photos/canm7/10869624411056640494.jpeg", "caption": "Knox Street in LaGrange with 2nd Street in the distance near flood at 18.2 feet on June 25, 2010." } }, { "id": "10887205318516937198", "type": "Feature", "geometry": { "type": "Point", "coordinates": [ 40.142395, -91.515031 ] }, "properties": { "image": "https://water.noaa.gov/resources/photos/canm7/10887205318516937198.jpeg", "caption": "East parking lot at Terrible's Casino in LaGrange on June 25, 2010 with a stage of 18.2 feet." } }, { "id": "10904246640645902830", "type": "Feature", "geometry": { "type": "Point", "coordinates": [ 40.142395, -91.515031 ] }, "properties": { "image": "https://water.noaa.gov/resources/photos/canm7/10904246640645902830.jpeg", "caption": "West parking lot at Terrible's Casino in LaGrange at a stage of 18.2 feet on June 25, 2010" } }, { "id": "10920478516058395118", "type": "Feature", "geometry": { "type": "Point", "coordinates": [ 40.142395, -91.515031 ] }, "properties": { "image": "https://water.noaa.gov/resources/photos/canm7/10920478516058395118.jpeg", "caption": "Mississippi RV Park outlets at Canton on June 25, 2010 at a stage of 18.15 feet." } } ] }, "dataAttribution": [ { "abbrev": "US Army Corps of Engineers", "text": "", "title": "US Army Corps of Engineers", "url": "http://rivergages.com" }, { "abbrev": "USGS", "text": "05495150", "title": "Observations courtesy of U.S. Geological Survey", "url": "https://waterdata.usgs.gov/nwis/inventory/?site_no=05495150" }, { "abbrev": "COE", "text": "Website", "title": "Observations courtesy of U.S. Army Corps of Engineers", "url": "https://rivergages.mvr.usace.army.mil/WaterControl/stationinfo2.cfm?sid=MI20&fid=&dt=S" } ], "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": "0930" }, { "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": "1001", "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": [] }, "horizontal": { "value": [] }, "notes": { "value": [] } }, "inundation": { "enabled": false, "url": "", "zeroDatum": null, "downloads": null, "siteSpecificInfo": "", "dataAttribution": [] }, "upstreamLid": "GGYM7", "downstreamLid": "LGRM7", "inService": { "enabled": true, "message": "" }, "lowThreshold": null, "forecastReliability": "Forecasts are issued routinely year-round.", "TruncateObs": "-1", "TruncateFcst": "-1", "ObservedFloodCategory": "no_flooding", "ForecastFloodCategory": "no_flooding" }