{
"lid": "SGFO1",
"usgsId": "03269500",
"reachId": "3985530",
"name": "Mad River near Springfield",
"description": "",
"rfc": {
"abbreviation": "OHRFC",
"name": "Ohio River Forecast Center"
},
"wfo": {
"abbreviation": "ILN",
"name": "Wilmington"
},
"state": {
"abbreviation": "OH",
"name": "Ohio"
},
"county": "Clark",
"timeZone": "EST5EDT",
"latitude": 39.9189,
"longitude": -83.8762,
"pedts": {
"observed": "HGIRG",
"forecast": "HGIFF"
},
"status": {
"observed": {
"primary": 3.15,
"primaryUnit": "ft",
"secondary": 0.245,
"secondaryUnit": "kcfs",
"floodCategory": "no_flooding",
"validTime": "2026-10-28T17:15:00Z"
},
"forecast": {
"primary": 3.2,
"primaryUnit": "ft",
"secondary": 0.262,
"secondaryUnit": "kcfs",
"floodCategory": "no_flooding",
"validTime": "2026-10-29T00:00:00Z"
}
},
"flood": {
"stageUnits": "ft",
"flowUnits": "cfs",
"categories": {
"major": {
"stage": 18,
"flow": -9999
},
"moderate": {
"stage": 16,
"flow": -9999
},
"minor": {
"stage": 12,
"flow": -9999
},
"action": {
"stage": 9,
"flow": -9999
}
},
"lro": {
"minorCS": "0.18",
"moderateCS": "< 0.05",
"majorCS": "< 0.05",
"producedTime": "2026-10-28T14:50:10Z",
"interval": "OND"
},
"crests": {
"historic": [
{
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"stage": 16.9,
"flow": 0,
"preliminary": "R",
"olddatum": true
},
{
"occurredTime": "1959-01-21T00:00:00Z",
"stage": 15.86,
"flow": 0,
"preliminary": "O",
"olddatum": true
},
{
"occurredTime": "1929-02-26T00:00:00Z",
"stage": 14.9,
"flow": 0,
"preliminary": "O",
"olddatum": true
},
{
"occurredTime": "1963-03-05T00:00:00Z",
"stage": 14.43,
"flow": 0,
"preliminary": "O",
"olddatum": true
},
{
"occurredTime": "2025-04-05T12:00:00Z",
"stage": 14.13,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "1937-01-25T00:00:00Z",
"stage": 14.1,
"flow": 0,
"preliminary": "O",
"olddatum": true
},
{
"occurredTime": "2026-03-27T17:30:00Z",
"stage": 14.09,
"flow": 8941,
"preliminary": "P",
"olddatum": false
},
{
"occurredTime": "1952-01-26T00:00:00Z",
"stage": 13.18,
"flow": 0,
"preliminary": "O",
"olddatum": true
},
{
"occurredTime": "2018-04-04T03:00:00Z",
"stage": 12.49,
"flow": 13264,
"preliminary": "O",
"olddatum": true
},
{
"occurredTime": "2005-01-06T12:45:00Z",
"stage": 12.26,
"flow": 0,
"preliminary": "O",
"olddatum": true
},
{
"occurredTime": "1964-03-10T00:00:00Z",
"stage": 12.1,
"flow": 0,
"preliminary": "O",
"olddatum": true
},
{
"occurredTime": "2004-01-05T06:22:00Z",
"stage": 11.91,
"flow": 0,
"preliminary": "O",
"olddatum": true
},
{
"occurredTime": "1980-06-29T00:00:00Z",
"stage": 11.88,
"flow": 0,
"preliminary": "O",
"olddatum": true
},
{
"occurredTime": "2005-01-12T11:45:00Z",
"stage": 11.69,
"flow": 0,
"preliminary": "O",
"olddatum": true
},
{
"occurredTime": "2007-03-02T10:45:00Z",
"stage": 11.66,
"flow": 10683,
"preliminary": "O",
"olddatum": true
},
{
"occurredTime": "1990-12-30T00:00:00Z",
"stage": 11.6,
"flow": 0,
"preliminary": "O",
"olddatum": false
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{
"occurredTime": "2018-02-25T11:30:00Z",
"stage": 11.5,
"flow": 10312,
"preliminary": "O",
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},
{
"occurredTime": "1996-05-11T00:00:00Z",
"stage": 11.5,
"flow": 0,
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{
"occurredTime": "2011-12-06T06:15:00Z",
"stage": 11.47,
"flow": 10242,
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},
{
"occurredTime": "2013-12-22T11:00:00Z",
"stage": 11.38,
"flow": 10037,
"preliminary": "O",
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{
"occurredTime": "2008-03-19T19:00:00Z",
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{
"occurredTime": "2019-05-17T13:30:00Z",
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"flow": 9636,
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},
{
"occurredTime": "1982-01-31T00:00:00Z",
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"flow": 0,
"preliminary": "O",
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},
{
"occurredTime": "2023-03-04T06:30:00Z",
"stage": 10.95,
"flow": 9098,
"preliminary": "O",
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},
{
"occurredTime": "2025-04-05T16:45:00Z",
"stage": 10.9,
"flow": 0,
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"olddatum": true
},
{
"occurredTime": "2020-03-20T12:30:00Z",
"stage": 10.85,
"flow": 8894,
"preliminary": "P",
"olddatum": true
},
{
"occurredTime": "2022-03-07T18:00:00Z",
"stage": 10.81,
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{
"occurredTime": "2022-02-18T04:45:00Z",
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},
{
"occurredTime": "2020-05-19T20:00:00Z",
"stage": 9.79,
"flow": 7119,
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},
{
"occurredTime": "2022-02-22T23:45:00Z",
"stage": 9.77,
"flow": 7092,
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},
{
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},
{
"occurredTime": "2024-04-02T21:00:00Z",
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},
{
"occurredTime": "2024-04-22T21:00:00Z",
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"flow": 0,
"preliminary": "O",
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},
{
"occurredTime": "2019-06-18T03:15:00Z",
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{
"occurredTime": "2019-06-16T20:30:00Z",
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"flow": 5358,
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},
{
"occurredTime": "2022-06-13T05:30:00Z",
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"flow": 5287,
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"olddatum": true
}
],
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{
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"olddatum": true
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{
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{
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"olddatum": true
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{
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{
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{
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{
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},
{
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{
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"preliminary": "P",
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{
"occurredTime": "2022-02-18T04:45:00Z",
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"flow": 7812,
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{
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{
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"flow": 8894,
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},
{
"occurredTime": "2019-06-18T03:15:00Z",
"stage": 8.33,
"flow": 5421,
"preliminary": "O",
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},
{
"occurredTime": "2019-06-16T20:30:00Z",
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"flow": 5358,
"preliminary": "O",
"olddatum": true
},
{
"occurredTime": "2019-05-17T13:30:00Z",
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"flow": 9636,
"preliminary": "O",
"olddatum": true
},
{
"occurredTime": "2018-04-04T03:00:00Z",
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"flow": 13264,
"preliminary": "O",
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},
{
"occurredTime": "2018-02-25T11:30:00Z",
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"flow": 10312,
"preliminary": "O",
"olddatum": true
},
{
"occurredTime": "2013-12-22T11:00:00Z",
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},
{
"occurredTime": "2011-12-06T06:15:00Z",
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"flow": 10242,
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},
{
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},
{
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"flow": 10683,
"preliminary": "O",
"olddatum": true
},
{
"occurredTime": "2005-01-12T11:45:00Z",
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"flow": 0,
"preliminary": "O",
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},
{
"occurredTime": "2005-01-06T12:45:00Z",
"stage": 12.26,
"flow": 0,
"preliminary": "O",
"olddatum": true
},
{
"occurredTime": "2004-01-05T06:22:00Z",
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"flow": 0,
"preliminary": "O",
"olddatum": true
},
{
"occurredTime": "1996-05-11T00:00:00Z",
"stage": 11.5,
"flow": 0,
"preliminary": "O",
"olddatum": true
},
{
"occurredTime": "1990-12-30T00:00:00Z",
"stage": 11.6,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "1982-01-31T00:00:00Z",
"stage": 11,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "1980-06-29T00:00:00Z",
"stage": 11.88,
"flow": 0,
"preliminary": "O",
"olddatum": true
},
{
"occurredTime": "1964-03-10T00:00:00Z",
"stage": 12.1,
"flow": 0,
"preliminary": "O",
"olddatum": true
},
{
"occurredTime": "1963-03-05T00:00:00Z",
"stage": 14.43,
"flow": 0,
"preliminary": "O",
"olddatum": true
},
{
"occurredTime": "1959-01-21T00:00:00Z",
"stage": 15.86,
"flow": 0,
"preliminary": "O",
"olddatum": true
},
{
"occurredTime": "1952-01-26T00:00:00Z",
"stage": 13.18,
"flow": 0,
"preliminary": "O",
"olddatum": true
},
{
"occurredTime": "1937-01-25T00:00:00Z",
"stage": 14.1,
"flow": 0,
"preliminary": "O",
"olddatum": true
},
{
"occurredTime": "1929-02-26T00:00:00Z",
"stage": 14.9,
"flow": 0,
"preliminary": "O",
"olddatum": true
},
{
"occurredTime": "1913-03-25T00:00:00Z",
"stage": 16.9,
"flow": 0,
"preliminary": "R",
"olddatum": true
}
]
},
"lowWaters": {
"historic": []
},
"impacts": [
{
"stage": 21,
"statement": "Major flooding occurs through Clark County along the river, with flooding affecting many homes close to the river between Lower Valley Pike and Dayton-Springfield Roads."
},
{
"stage": 19,
"statement": "This is a similar crest to the 1959 flood. Significant flooding of low-lying residences and businesses in Snyderville and Durbin occurs, as well as other low areas along the river southwest of Springfield. Spangler Road is flooded south of Medway, as well as Osborn, Union and Snider Roads. Flooding also occurs at the Waste Water Treatment Plant near Woodbury Road."
},
{
"stage": 18,
"statement": "About half of the Springfield Waste Water Treatment Plant is flooded, as well as portions of Lower Valley Pike and Old Mill Road."
},
{
"stage": 17,
"statement": "Several homes along the river become inundated, especially in low areas of Snyderville and Durbin. Portions of Lower Valley Pike are flooded, as well as near St. Paris Pike. Levees along Buck and Beaver Creeks help prevent backwater flooding in Springfield itself."
},
{
"stage": 16,
"statement": "Water spills onto low-lying area roads south of Springfield, possibly cutting off access to some areas, particularly near Durbin and Snyderville. Locations along the river upstream in Champaign and Logan Counties also experience flooding in lowland areas. Some evacuations may be necessary in low-lying communities along the river."
},
{
"stage": 14,
"statement": "West 1st Street in Springfield Township floods, including the Forest Lake Fishing and Campround area, with water approaching some businesses along West 1st Street. Spangler Road downstream of Springfield also floods. Flood waters approach several homes to the southwest of Springfield. In addition, the Mad River experiences widespread flooding in Champaign County near the river."
},
{
"stage": 13,
"statement": "In addition to flooding along Lower Valley Pike between Old Mill Road and State Route 369, Spengler Road is flooded, and the I-70 Westbound exit to Medway at route 675 is closed."
},
{
"stage": 12,
"statement": "Flooding occurs along Spangler Road and Lower Valley Pike. "
}
]
},
"images": {
"probability": {
"weekint": {
"stage": "https://water.noaa.gov/resources/probabilistic/exceedance/SGFO1.SSTG.prob.weekint.gif",
"flow": "https://water.noaa.gov/resources/probabilistic/exceedance/SGFO1.QINE.prob.weekint.gif",
"volume": "https://water.noaa.gov/resources/probabilistic/exceedance/SGFO1.volume.prob.weekint.gif"
},
"entperiod": {
"stage": "https://water.noaa.gov/resources/probabilistic/exceedance/SGFO1.SSTG.exceed.90day.gif",
"flow": "https://water.noaa.gov/resources/probabilistic/exceedance/SGFO1.QINE.exceed.90day.gif",
"volume": "https://water.noaa.gov/resources/probabilistic/exceedance/SGFO1.volume.exceed.90day.gif"
},
"shortrange": "https://water.noaa.gov/resources/probabilistic/short_term/SGFO1.shortrange.hefs.png"
},
"hydrograph": {
"default": "https://water.noaa.gov/resources/hydrographs/sgfo1_hg.png",
"floodcat": "https://water.noaa.gov/resources/hydrographs/sgfo1_record.png"
},
"photos": []
},
"dataAttribution": [
{
"abbrev": "US Geological Survey",
"text": "USGS--Water Resources of the United States",
"title": "US Geological Survey",
"url": "https://waterdata.usgs.gov/nwis"
},
{
"abbrev": "USGS",
"text": "03269500",
"title": "Observations courtesy of U.S. Geological Survey",
"url": "https://waterdata.usgs.gov/nwis/inventory/?site_no=03269500"
}
],
"impactsLowWaters": [],
"normalThreshold": null,
"hydronotes": [
{
"statement": "Stage may be affected by ice.",
"effective": "0101",
"expiration": "0301"
},
{
"statement": "Due to a gage move, all flood stages/categories will change at this location effective September 16, 2025 -- see HERE for details.",
"effective": "0101",
"expiration": "1212"
},
{
"statement": "River Forecasts typically include ONLY 2 days of future rain from forecast issuance time (lower right of graph). Occasionally 3 days of future rain included.",
"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": 876.09
}
]
},
"horizontal": {
"value": []
},
"notes": {
"value": []
}
},
"inundation": {
"enabled": false,
"url": "",
"zeroDatum": null,
"downloads": null,
"siteSpecificInfo": "",
"dataAttribution": []
},
"upstreamLid": "CJBO1",
"downstreamLid": "MRDO1",
"inService": {
"enabled": true,
"message": ""
},
"lowThreshold": null,
"forecastReliability": "Forecasts are issued routinely year-round.",
"TruncateObs": "-1",
"TruncateFcst": "-1",
"ObservedFloodCategory": "no_flooding",
"ForecastFloodCategory": "no_flooding"
}