{ "lid": "BRKS2", "usgsId": "06480000", "reachId": "9376712", "name": "Big Sioux River near Brookings", "description": "", "rfc": { "abbreviation": "MBRFC", "name": "Missouri Basin River Forecast Center" }, "wfo": { "abbreviation": "FSD", "name": "Sioux Falls" }, "state": { "abbreviation": "SD", "name": "South Dakota" }, "county": "Moody", "timeZone": "CST6CDT", "latitude": 44.180277777778, "longitude": -96.749166666667, "pedts": { "observed": "HGIRG", "forecast": "HGIFE" }, "status": { "observed": { "primary": 4.05, "primaryUnit": "ft", "secondary": 0.503, "secondaryUnit": "kcfs", "floodCategory": "no_flooding", "validTime": "2026-11-14T06:45:00Z" }, "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": 15, "flow": -9999 }, "moderate": { "stage": 10.5, "flow": -9999 }, "minor": { 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"occurredTime": "1959-03-05T00:00:00Z", "stage": 5, "flow": 240, "preliminary": "O", "olddatum": false }, { "occurredTime": "1958-03-27T00:00:00Z", "stage": 4.58, "flow": 382, "preliminary": "O", "olddatum": false }, { "occurredTime": "1957-06-17T00:00:00Z", "stage": 11.67, "flow": 5320, "preliminary": "O", "olddatum": false }, { "occurredTime": "1956-03-24T00:00:00Z", "stage": 4.42, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1955-03-12T00:00:00Z", "stage": 8.62, "flow": 1180, "preliminary": "O", "olddatum": false }, { "occurredTime": "1954-03-22T00:00:00Z", "stage": 9.79, "flow": 1970, "preliminary": "O", "olddatum": false } ] }, "lowWaters": { "historic": [] }, "impacts": [ { "stage": 16, "statement": "The bridges on 473rd Avenue and 475th Avenue are overtopped." }, { "stage": 14, "statement": "The water reaches the bottom of the bridges on 473rd Avenue and 475th Avenue." }, { "stage": 13, "statement": "223rd St west of the bridge begins to flood. The bridge 1 mile south of Medary on 471st Avenue is overtopped." }, { "stage": 12, "statement": "475th Avenue and 222nd Street begin to flood." }, { "stage": 11.5, "statement": "473rd Avenue at 221st Street begins to flood." }, { "stage": 11, "statement": "Some farm outbuildings begin to flood." }, { "stage": 10.5, "statement": "473rd Avenue north of the gauge begins to flood." }, { "stage": 10, "statement": "Flooding begins to affect agricultural lands along the right bank of the river." }, { "stage": 9, "statement": "Significant amounts of pasture and farm lands begin flooding on the left bank of the river. The road south of the Brookings water treatment plant is flooded, as is 217th Street between 468th and 469th Avenues." }, { "stage": 8, "statement": "There is some minor overflow of the lowest banks along this stretch of the river." } ] }, "images": { "probability": { "weekint": { "stage": "https://water.noaa.gov/resources/probabilistic/exceedance/BRKS2.SSTG.prob.weekint.gif", "flow": "https://water.noaa.gov/resources/probabilistic/exceedance/BRKS2.QINE.prob.weekint.gif", "volume": "https://water.noaa.gov/resources/probabilistic/exceedance/BRKS2.volume.prob.weekint.gif" }, "entperiod": { "stage": "https://water.noaa.gov/resources/probabilistic/exceedance/BRKS2.SSTG.exceed.90day.gif", "flow": "https://water.noaa.gov/resources/probabilistic/exceedance/BRKS2.QINE.exceed.90day.gif", "volume": "https://water.noaa.gov/resources/probabilistic/exceedance/BRKS2.volume.exceed.90day.gif" }, "shortrange": "https://water.noaa.gov/resources/probabilistic/short_term/BRKS2.shortrange.hefs.png" }, "hydrograph": { "default": "https://water.noaa.gov/resources/hydrographs/brks2_hg.png", "floodcat": "https://water.noaa.gov/resources/hydrographs/brks2_record.png" }, "photos": [ { "id": "545731712579736046", "type": "Feature", "geometry": { "type": "Point", "coordinates": [ 44.180277777778, -96.749166666667 ] }, "properties": { "image": "https://water.noaa.gov/resources/photos/brks2/545731712579736046.jpeg", "caption": "Downstream View (6/21/2023)" } }, { "id": "624372400560738798", "type": "Feature", "geometry": { "type": "Point", "coordinates": [ 44.180277777778, -96.749166666667 ] }, "properties": { "image": "https://water.noaa.gov/resources/photos/brks2/624372400560738798.jpeg", "caption": "Upstream View (6/21/2023)" } } ] }, "dataAttribution": [ { "abbrev": "USGS", "text": "06480000", "title": "Observations courtesy of U.S. Geological Survey", "url": "https://waterdata.usgs.gov/monitoring-location/06480000/" } ], "impactsLowWaters": [], "normalThreshold": { "value": 0, "units": "ft" }, "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": "Gauge reading may be affected by ice.", "effective": "1001", "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": 1552.8 } ] }, "horizontal": { "value": [] }, "notes": { "value": [] } }, "inundation": { "enabled": false, "url": "", "zeroDatum": null, "downloads": null, "siteSpecificInfo": "", "dataAttribution": [] }, "upstreamLid": "BRCS2", "downstreamLid": "BSFS2", "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": "-1", "ObservedFloodCategory": "no_flooding", "ForecastFloodCategory": "fcst_not_current" }