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"stage": 45.5, "flow": 53300, "preliminary": "O", "olddatum": false }, { "occurredTime": "1892-04-17T00:00:00Z", "stage": 33.4, "flow": 23000, "preliminary": "O", "olddatum": false }, { "occurredTime": "1891-04-13T00:00:00Z", "stage": 17.7, "flow": 6000, "preliminary": "O", "olddatum": false }, { "occurredTime": "1890-04-15T00:00:00Z", "stage": 10.6, "flow": 3470, "preliminary": "O", "olddatum": false }, { "occurredTime": "1889-04-01T00:00:00Z", "stage": 12, "flow": 3000, "preliminary": "O", "olddatum": false }, { "occurredTime": "1888-04-19T00:00:00Z", "stage": 29.5, "flow": 19000, "preliminary": "O", "olddatum": false }, { "occurredTime": "1887-04-15T00:00:00Z", "stage": 16.3, "flow": 7300, "preliminary": "O", "olddatum": false }, { "occurredTime": "1886-05-03T00:00:00Z", "stage": 20.6, "flow": 10800, "preliminary": "O", "olddatum": false }, { "occurredTime": "1885-04-17T00:00:00Z", "stage": 23.1, "flow": 13040, "preliminary": "O", "olddatum": false }, { "occurredTime": "1884-04-16T00:00:00Z", "stage": 31.1, "flow": 20600, "preliminary": "O", "olddatum": false }, { "occurredTime": "1883-04-26T00:00:00Z", "stage": 42.2, "flow": 38600, "preliminary": "O", "olddatum": false }, { "occurredTime": "1882-04-18T00:00:00Z", "stage": 48, "flow": 75000, "preliminary": "O", "olddatum": false } ] }, "lowWaters": { "historic": [] }, "impacts": [ { "stage": 63, "statement": "Top of the flood walls for the city of Grand Forks." }, { "stage": 60, "statement": "Top of the levee constructed by the Corps of Engineers for the city of Grand Forks." }, { "stage": 57, "statement": "Mallory Bridge closes. (East Grand Forks)" }, { "stage": 55, "statement": "Close Business Highway 2 with earthen closures. (East Grand Forks)" }, { "stage": 54.35, "statement": "**** Record flood level - 22 April 1997...from floodmarks. ****" }, { "stage": 53.5, "statement": "Close Highway 220 with earthen closures. (East Grand Forks)" }, { "stage": 53, "statement": "Top of the rails on the Burlington Northern Santa Fe Railroad Bridge over the Red River." }, { "stage": 52.6, "statement": "Water on Gateway Drive approach to Kennedy Bridge. (Grand Forks)" }, { "stage": 52, "statement": "Close railroad at US Highway 2 and Kennedy Bridge with earthen closures." }, { "stage": 50.1, "statement": "Hill St closure to be assembled. (East Grand Forks)" }, { "stage": 48.5, "statement": "Second Ave NE at 2nd St NE closure to be constructed. Bygland Road at Murray Bridge closure to be assembled. Murray Bridge closed. (East Grand Forks)" }, { "stage": 47, "statement": "Hill St railroad closure and 4th St NW road closure to be assembled. (East Grand Forks)" }, { "stage": 46.5, "statement": "Twelfth St NW road closure assembled. Twelfth St NW closed at River Road. (East Grand Forks)" }, { "stage": 46.2, "statement": "Water on Demers Ave at Sorlie Bridge. (Grand Forks)" }, { "stage": 46, "statement": "MAJOR FLOOD STAGE." }, { "stage": 45, "statement": "Top of the elevation of the low level levee protecting Riverside Park. (Grand Forks)" }, { "stage": 44.9, "statement": "Water on East Grand Forks approach to the Point Bridge." }, { "stage": 44, "statement": "River Road and 17th St NW closure to be assembled. River Road/4th St NW closed from 17th St NW to 5th Ave NW. (East Grand Forks)" }, { "stage": 43.5, "statement": "Demers Ave closure to be assembled and closed at River St Sorlie Bridge closes. Downtown invisible floodwall to be assembled." }, { "stage": 42, "statement": "Road entering Riverside Park is closed. (Grand Forks)" }, { "stage": 41.5, "statement": "Flood gates on English Coulee are closed, pump station and diversion gates are activated. (Grand Forks)" }, { "stage": 40, "statement": "MODERATE FLOOD STAGE. Extensive flooding along the greenway. (Grand Forks) Point Bridge closes due to water on approach and Eagles Point Trail Head/Park closes. (East Grand Forks)" }, { "stage": 38, "statement": "Flood gates are closed and storm water pumping stations are activated. (Grand Forks)" }, { "stage": 36.5, "statement": "River Heights Trail Head and Park closed. (East Grand Forks)" }, { "stage": 34, "statement": "Fourth St underpass at Gateway Drive (Hwy 2) closes. (East Grand Forks)" } ] }, "images": { "probability": { "weekint": { "stage": "https://water.noaa.gov/resources/probabilistic/exceedance/EGFM5.SSTG.prob.weekint.gif", "flow": "https://water.noaa.gov/resources/probabilistic/exceedance/EGFM5.QINE.prob.weekint.gif", "volume": "https://water.noaa.gov/resources/probabilistic/exceedance/EGFM5.volume.prob.weekint.gif" }, "entperiod": { "stage": "https://water.noaa.gov/resources/probabilistic/exceedance/EGFM5.SSTG.exceed.90day.gif", "flow": "https://water.noaa.gov/resources/probabilistic/exceedance/EGFM5.QINE.exceed.90day.gif", "volume": "https://water.noaa.gov/resources/probabilistic/exceedance/EGFM5.volume.exceed.90day.gif" }, "shortrange": "https://water.noaa.gov/resources/probabilistic/short_term/EGFM5.shortrange.hefs.png" }, "hydrograph": { "default": "https://water.noaa.gov/resources/hydrographs/egfm5_hg.png", "floodcat": "https://water.noaa.gov/resources/hydrographs/egfm5_record.png" }, "photos": [ { "id": "7274955578528895470", "type": "Feature", "geometry": { "type": "Point", "coordinates": [ 47.9269444444444, -97.0288888888889 ] }, "properties": { "image": "https://water.noaa.gov/resources/photos/egfm5/7274955578528895470.jpeg", "caption": "EGFM5 Gage" } }, { "id": "7176077743383515630", "type": "Feature", "geometry": { "type": "Point", "coordinates": [ 47.9269444444444, -97.0288888888889 ] }, "properties": { "image": "https://water.noaa.gov/resources/photos/egfm5/7176077743383515630.jpeg", "caption": "EGFM5 Downstream" } }, { "id": "7228356373073236462", "type": "Feature", "geometry": { "type": "Point", "coordinates": [ 47.9269444444444, -97.0288888888889 ] }, "properties": { "image": "https://water.noaa.gov/resources/photos/egfm5/7228356373073236462.jpeg", "caption": "EGFM5 Upstream" } } ] }, "dataAttribution": [ { "abbrev": "USGS (05082500)", "text": "USGS Readings", "title": "Observations courtesy of U.S. Geological Survey", "url": "https://waterdata.usgs.gov/monitoring-location/05082500" } ], "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": "Stage may be affected by ice during winter months.", "effective": "1101", "expiration": "0401" } ], "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": 780 }, { "label": "National Geodetic Vertical Datum of 1929", "abbrev": "NGVD29", "description": "A fixed reference adopted as a standard geodetic datum for elevations determined by leveling. The datum was derived for surveys from a general adjustment of the first-order leveling nets of both the United States and Canada. In the adjustment, mean sea level was held fixed as observed at 21 tide stations in the United States and 5 in Canada. The year indicates the time of the general adjustment. A synonym for Sea-level Datum of 1929. The geodetic datum is fixed and does not take into account the changing stands of sea level. Because there are many variables affecting sea level, and because the geodetic datum represents a best fit over a broad area, the relationship between the geodetic datum and local mean sea level is not consistent from one location to another in either time or space. For this reason, the National Geodetic Vertical Datum should not be confused with mean sea level. See North American Vertical Datum of 1988 (NAVD 88). NGVD 29 should not be used as Mean Sea Level. NGVD 29 is no longer supported by NGS.", "value": 779 } ] }, "horizontal": { "value": [] }, "notes": { "value": [] } }, "inundation": { "enabled": false, "url": "", "zeroDatum": null, "downloads": null, "siteSpecificInfo": "", "dataAttribution": [] }, "upstreamLid": "TPNN8", "downstreamLid": "OSLM5", "inService": { "enabled": true, "message": "" }, "lowThreshold": null, "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" }