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19.97, "flow": 61700, "preliminary": "O", "olddatum": false }, { "occurredTime": "1962-03-29T23:00:00Z", "stage": 26.48, "flow": 115000, "preliminary": "O", "olddatum": false }, { "occurredTime": "1961-06-15T00:00:00Z", "stage": 17.66, "flow": 41700, "preliminary": "O", "olddatum": false }, { "occurredTime": "1960-04-04T00:00:00Z", "stage": 26.96, "flow": 120000, "preliminary": "O", "olddatum": false }, { "occurredTime": "1952-04-18T00:00:00Z", "stage": 40.2, "flow": 396000, "preliminary": "R", "olddatum": true }, { "occurredTime": "1881-04-25T00:00:00Z", "stage": 34.22, "flow": -9999, "preliminary": "O", "olddatum": true } ] }, "lowWaters": { "historic": [ { "occurredTime": "2024-01-16T00:00:00Z", "stage": 3.87, "flow": -9999, "statement": "" }, { "occurredTime": "2022-12-24T00:00:00Z", "stage": 4.09, "flow": -9999, "statement": "" }, { "occurredTime": "2014-01-01T00:00:00Z", "stage": 6.63, "flow": -9999, "statement": "Verified with CB USGS office, via Kate Holt" }, { "occurredTime": "2013-02-03T00:00:00Z", "stage": 6.64, "flow": -9999, "statement": "from USGS online trace" }, { "occurredTime": "2025-01-21T00:00:00Z", "stage": 6.8, "flow": -9999, "statement": "" }, { "occurredTime": "1989-02-05T00:00:00Z", "stage": 6.85, "flow": 6500, "statement": "MINIMUM \"HG\" AND DAILY \"Q\" DUE TO FREEZEUP." }, { "occurredTime": "1957-01-10T00:00:00Z", "stage": 7.23, "flow": -9999, "statement": "MINIMUM GAGE HEIGHT OBSERVED DUE TO FREEZEUP." }, { "occurredTime": "1961-12-14T00:00:00Z", "stage": 7.98, "flow": 2440, "statement": "MINIMUM \"HG\" AND \"Q\" FOR THE YEAR (FREEZEUP)." }, { "occurredTime": "1982-01-12T00:00:00Z", "stage": 8.15, "flow": 10000, "statement": "MINIMUM \"HG\" AND DAILY \"Q\" FOR THE YEAR." }, { "occurredTime": "1989-12-17T00:00:00Z", "stage": 8.23, "flow": -9999, "statement": "MINIMUM GAGE HEIGHT DUE TO FREEZE-UP." }, { "occurredTime": "1990-12-22T00:00:00Z", "stage": 8.24, "flow": -9999, "statement": "MINIMUM GAGE HEIGHT DUE TO FREEZEUP." }, { "occurredTime": "1964-12-18T00:00:00Z", "stage": 8.8, "flow": 3200, "statement": "MINIMUM \"HG\" AND DAILY \"Q\" FOR THE YEAR." }, { "occurredTime": "1962-12-13T00:00:00Z", "stage": 9.03, "flow": 3300, "statement": "MINIMUM \"HG\" AND DAILY \"Q\" DUE TO FREEZEUP." }, { "occurredTime": "1960-12-21T00:00:00Z", "stage": 9.63, "flow": -9999, "statement": "MINIMUM GAGE HEIGHT FOR THE YEAR." }, { "occurredTime": "1981-02-11T00:00:00Z", "stage": 10, "flow": 12900, "statement": "MINIMUM \"HG\" AND DAILY \"Q\" FOR THE YEAR." }, { "occurredTime": "1985-01-23T00:00:00Z", "stage": 10, "flow": 20800, "statement": "MINIMUM \"HG\" AND DAILY \"Q\" FOR THE YEAR." }, { "occurredTime": "1967-01-10T00:00:00Z", "stage": 10.02, "flow": 4800, "statement": "MINIMUM \"HG\" AND DAILY \"Q\" DUE TO FREEZEUP." }, { "occurredTime": "1976-01-09T00:00:00Z", "stage": 10.12, "flow": 13200, "statement": "MINIMUM \"HG\" AND DAILY \"Q\" FOR THE YEAR." }, { "occurredTime": "1978-01-28T00:00:00Z", "stage": 10.17, "flow": -9999, "statement": "GRAPH BASED ON OUTSIDE GAGE HEIGHT READINGS." }, { "occurredTime": "1963-12-11T00:00:00Z", "stage": 10.83, "flow": 6000, "statement": "MINIMUM \"HG\" AND DAILY \"Q\" DUE TO FREEZEUP." }, { "occurredTime": "1988-01-07T00:00:00Z", "stage": 10.89, "flow": 12900, "statement": "MINIMUM \"HG\" AND DAILY \"Q\" FOR THE YEAR." }, { "occurredTime": "1975-01-14T00:00:00Z", "stage": 11.3, "flow": 8700, "statement": "MINIMUM \"HG\" AND DAILY \"Q\" FOR THE YEAR." }, { "occurredTime": "1972-01-18T00:00:00Z", "stage": 11.57, "flow": 5460, "statement": "MINIMUM \"HG\" AND DAILY \"Q\" FOR THE YEAR." }, { "occurredTime": "1985-12-27T00:00:00Z", "stage": 11.75, "flow": 14900, "statement": "MINIMUM DAILY \"HG\" AND \"Q\" FOR THE YEAR." }, { "occurredTime": "1980-01-10T00:00:00Z", "stage": 12, "flow": -9999, "statement": "MINIMUM GAGE HEIGHT FOR THE YEAR." }, { "occurredTime": "1967-12-24T00:00:00Z", "stage": 12.24, "flow": -9999, "statement": "MINIMUM GAGE HEIGHT FOR THE YEAR." }, { "occurredTime": "1966-03-07T00:00:00Z", "stage": 12.48, "flow": -9999, "statement": "MINIMUM GAGE HEIGHT FOR THE YEAR." }, { "occurredTime": "1983-12-24T00:00:00Z", "stage": 12.58, "flow": 15500, "statement": "MINIMUM \"HG\" AND DAILY \"Q\" FOR THE YEAR." }, { "occurredTime": "1977-03-07T00:00:00Z", "stage": 12.62, "flow": -9999, "statement": "MINIMUM GAGE HEIGHT OBSERVED FOR THE YEAR." }, { "occurredTime": "1979-01-14T00:00:00Z", "stage": 12.75, "flow": -9999, "statement": "MINIMUM GAGE HEIGHT FOR THE YEAR." }, { "occurredTime": "1972-12-21T00:00:00Z", "stage": 12.88, "flow": 19600, "statement": "MINIMUM \"HG\" AND DAILY \"Q\" FOR THE YEAR." }, { "occurredTime": "1974-01-12T00:00:00Z", "stage": 13.2, "flow": 13300, "statement": "MINIMUM \"HG\" AND DAILY \"Q\" FOR THE YEAR." }, { "occurredTime": "1974-01-11T00:00:00Z", "stage": 13.2, "flow": -9999, "statement": "MINIMUM GAGE HEIGHT FOR THE YEAR." }, { "occurredTime": "1983-01-18T00:00:00Z", "stage": 14.08, "flow": -9999, "statement": "MINIMUM GAGE HEIGHT FOR THE YEAR." }, { "occurredTime": "1987-01-27T00:00:00Z", "stage": 14.64, "flow": -9999, "statement": "MINIMUM GAGE HEIGHT FOR THE YEAR." } ] }, "impacts": [ { "stage": 40, "statement": "At this level the water nears the top of the federal levee." }, { "stage": 36, "statement": "Water reaches the bottom of flood wall just north of Interstate 480. Low lying roads are also affected just east of Riverfront Drive north of the pedestrian bridge." }, { "stage": 32.5, "statement": "Floodwaters are reaching areas near Council Bluffs, specifically near Interstate 29, mile marker 56." }, { "stage": 30.5, "statement": "Floodwaters are impacting Interstate 29/680 near Crescent and northward to exit 71 near Loveland." }, { "stage": 29, "statement": "At this level water nears the base of the Council Bluffs levee. Significant lowland flooding occurs in NP Dodge Park, Freedom Park, Tom Hanafan Park, Fontenelle Forest and Haworth Park." }, { "stage": 28, "statement": "At this level most of the flood gates for the city of Council Bluffs are closed. " }, { "stage": 27, "statement": "Freedom Park, Tom Hanafan River's Edge Park and Fontenelle Forest begin to flood." }, { "stage": 25, "statement": "Haworth Park located in Bellevue begins to flood." }, { "stage": 21, "statement": "At this level the City of Council Bluffs begins closing flood gates." }, { "stage": 19, "statement": "At this level, the City of Council Bluffs begins to close drainage gates that discharge into the river." } ] }, "images": { "probability": { "weekint": { "stage": "https://water.noaa.gov/resources/probabilistic/exceedance/OMHN1.SSTG.prob.weekint.gif", "flow": "https://water.noaa.gov/resources/probabilistic/exceedance/OMHN1.QINE.prob.weekint.gif", "volume": "https://water.noaa.gov/resources/probabilistic/exceedance/OMHN1.volume.prob.weekint.gif" }, "entperiod": { "stage": "https://water.noaa.gov/resources/probabilistic/exceedance/OMHN1.SSTG.exceed.90day.gif", "flow": "https://water.noaa.gov/resources/probabilistic/exceedance/OMHN1.QINE.exceed.90day.gif", "volume": "https://water.noaa.gov/resources/probabilistic/exceedance/OMHN1.volume.exceed.90day.gif" }, "shortrange": "https://water.noaa.gov/resources/probabilistic/short_term/OMHN1.shortrange.hefs.png" }, "hydrograph": { "default": "https://water.noaa.gov/resources/hydrographs/omhn1_hg.png", "floodcat": "https://water.noaa.gov/resources/hydrographs/omhn1_record.png" }, "photos": [ { "id": "17653006062262292974", "type": "Feature", "geometry": { "type": "Point", "coordinates": [ 41.259054, -95.923221 ] }, "properties": { "image": "https://water.noaa.gov/resources/photos/omhn1/17653006062262292974.jpeg", "caption": "Looking downstream from pedestrian bridge" } }, { "id": "17661667503764804078", "type": "Feature", "geometry": { "type": "Point", "coordinates": [ 41.259054, -95.923221 ] }, "properties": { "image": "https://water.noaa.gov/resources/photos/omhn1/17661667503764804078.jpeg", "caption": "Looking upstream near gage site" } } ] }, "dataAttribution": [ { "abbrev": "USGS", "text": "06610000", "title": "Observations courtesy of the USGS", "url": "https://waterdata.usgs.gov/monitoring-location/06610000" } ], "impactsLowWaters": [ { "value": "9", "impact": "Water intake structures along this stretch of the river begin to be monitored for possible exposure." }, { "value": "3", "impact": "This is the lower operating limit for the gage." } ], "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": "Stage may be affected by ice.", "effective": "1101", "expiration": "0331" } ], "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": 948.966 } ] }, "horizontal": { "value": [] }, "notes": { "value": [] } }, "inundation": { "enabled": false, "url": "", "zeroDatum": null, "downloads": null, "siteSpecificInfo": "", "dataAttribution": [] }, "upstreamLid": "BLAN1", "downstreamLid": "MOMN1", "inService": { "enabled": true, "message": "" }, "lowThreshold": { "units": "ft", "value": 9 }, "forecastReliability": "Forecasts are issued routinely year-round.", "TruncateObs": "-1", "TruncateFcst": "-1", "ObservedFloodCategory": "no_flooding", "ForecastFloodCategory": "no_flooding" }