{ "lid": "FREP1", "usgsId": "03039040", "reachId": "11049952", "name": "Allegheny River at Freeport Lock and Dam", "description": "", "rfc": { "abbreviation": "OHRFC", "name": "Ohio River Forecast Center" }, "wfo": { "abbreviation": "PBZ", "name": "Moon Township" }, "state": { "abbreviation": "PA", "name": "Pennsylvania" }, "county": "Armstrong", "timeZone": "EST5EDT", "latitude": 40.684722222222, "longitude": -79.6675, "pedts": { "observed": "HPIRG", "forecast": "HPIFF" }, "status": { "observed": { "primary": 9.78, "primaryUnit": "ft", "secondary": 3.46, "secondaryUnit": "kcfs", "floodCategory": "no_flooding", "validTime": "2026-08-30T20:30:00Z" }, "forecast": { "primary": 9.7, "primaryUnit": "ft", "secondary": 3.09, "secondaryUnit": "kcfs", "floodCategory": "no_flooding", "validTime": "2026-08-31T00:00:00Z" } }, "flood": { "stageUnits": "ft", "flowUnits": "cfs", "categories": { "major": { "stage": 26, "flow": -9999 }, "moderate": { "stage": 24, "flow": -9999 }, "minor": { "stage": 23, "flow": -9999 }, "action": { "stage": 16, "flow": -9999 } }, "lro": { "minorCS": "< 0.05", "moderateCS": "< 0.05", "majorCS": "< 0.05", "producedTime": "2026-08-29T03:30:05Z", "interval": "SON" }, "crests": { "historic": [ { "occurredTime": "1936-03-18T00:00:00Z", "stage": 33.3, "flow": 0, "preliminary": "R", "olddatum": false }, { "occurredTime": "1942-12-30T00:00:00Z", "stage": 25.7, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1964-03-10T00:00:00Z", "stage": 25.3, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1996-01-20T00:00:00Z", "stage": 25, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1959-01-22T00:00:00Z", "stage": 24.8, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1972-06-23T00:00:00Z", "stage": 24.5, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2004-09-18T14:00:00Z", "stage": 24.1, "flow": 145500, "preliminary": "O", "olddatum": false }, { "occurredTime": "2007-03-16T04:00:00Z", "stage": 23.6, "flow": 178450, "preliminary": "O", "olddatum": false }, { "occurredTime": "1964-03-05T00:00:00Z", "stage": 23.3, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1966-02-14T00:00:00Z", "stage": 22.7, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2022-02-19T00:00:00Z", "stage": 22.58, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2024-04-13T06:14:00Z", "stage": 22.52, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1990-12-31T00:00:00Z", "stage": 22.5, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1989-06-21T00:00:00Z", "stage": 22.2, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2024-01-29T13:30:00Z", "stage": 19.54, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2007-03-23T17:00:00Z", "stage": 18.5, "flow": 89340, "preliminary": "O", "olddatum": false } ], "recent": [ { "occurredTime": "2024-04-13T06:14:00Z", "stage": 22.52, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2024-01-29T13:30:00Z", "stage": 19.54, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2022-02-19T00:00:00Z", "stage": 22.58, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2007-03-23T17:00:00Z", "stage": 18.5, "flow": 89340, "preliminary": "O", "olddatum": false }, { "occurredTime": "2007-03-16T04:00:00Z", "stage": 23.6, "flow": 178450, "preliminary": "O", "olddatum": false }, { "occurredTime": "2004-09-18T14:00:00Z", "stage": 24.1, "flow": 145500, "preliminary": "O", "olddatum": false }, { "occurredTime": "1996-01-20T00:00:00Z", "stage": 25, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1990-12-31T00:00:00Z", "stage": 22.5, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1989-06-21T00:00:00Z", "stage": 22.2, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1972-06-23T00:00:00Z", "stage": 24.5, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1966-02-14T00:00:00Z", "stage": 22.7, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1964-03-10T00:00:00Z", "stage": 25.3, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1964-03-05T00:00:00Z", "stage": 23.3, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1959-01-22T00:00:00Z", "stage": 24.8, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1942-12-30T00:00:00Z", "stage": 25.7, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1936-03-18T00:00:00Z", "stage": 33.3, "flow": 0, "preliminary": "R", "olddatum": false } ] }, "lowWaters": { "historic": [] }, "impacts": [ { "stage": 33.29, "statement": "Water reaches the record flood level of the ST. Patricks Day Flood and crest on March 18, 1936." }, { "stage": 25, "statement": "Some buildings in the industrial park 1/4 mile upstream from the Lock begin to flood." }, { "stage": 24.1, "statement": "Water reaches the level reached during Hurricane Ivan September 18, 2004. Freeport received 6 inches of rain." }, { "stage": 22.8, "statement": "Backwater from Buffalo Creek surrounds the sewage disposal plant on Lower Market Street. Basements on First, Second and Lower High and Market Streets in town begin to flood." }, { "stage": 20.2, "statement": "Lock walls overtopped." }, { "stage": 16, "statement": "Navigation suspended. Lock out of service." } ] }, "images": { "probability": { "weekint": { "stage": "https://water.noaa.gov/resources/probabilistic/exceedance/FREP1.SSTG.prob.weekint.gif", "flow": "https://water.noaa.gov/resources/probabilistic/exceedance/FREP1.QINE.prob.weekint.gif", "volume": "https://water.noaa.gov/resources/probabilistic/exceedance/FREP1.volume.prob.weekint.gif" }, "entperiod": { "stage": "https://water.noaa.gov/resources/probabilistic/exceedance/FREP1.SSTG.exceed.90day.gif", "flow": "https://water.noaa.gov/resources/probabilistic/exceedance/FREP1.QINE.exceed.90day.gif", "volume": "https://water.noaa.gov/resources/probabilistic/exceedance/FREP1.volume.exceed.90day.gif" }, "shortrange": "https://water.noaa.gov/resources/probabilistic/short_term/FREP1.shortrange.hefs.png" }, "hydrograph": { "default": "https://water.noaa.gov/resources/hydrographs/frep1_hg.png", "floodcat": "https://water.noaa.gov/resources/hydrographs/frep1_record.png" }, "photos": [] }, "dataAttribution": [ { "abbrev": "USGS", "text": "03039040", "title": "Observations courtesy of U.S. Geological Survey", "url": "https://waterdata.usgs.gov/nwis/inventory/?site_no=03039040" }, { "abbrev": "COE", "text": "Website", "title": "Observations courtesy of U.S. Army Corps of Engineers", "url": "https://www.lrp.usace.army.mil/Missions/Navigation/Locks-and-Dams/Lock-Dam-5-Allegheny-River/" } ], "impactsLowWaters": [], "normalThreshold": { "value": 9, "units": "ft" }, "hydronotes": [ { "statement": "The above river forecast includes future rainfall. Forecast stages may be different if the rainfall does not occur.", "effective": "0101", "expiration": "1231" }, { "statement": "Stage may be affected by ice.", "effective": "0101", "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": 747.5 } ] }, "horizontal": { "value": [] }, "notes": { "value": [] } }, "inundation": { "enabled": false, "url": "", "zeroDatum": null, "downloads": null, "siteSpecificInfo": "", "dataAttribution": [] }, "upstreamLid": "CLNP1", "downstreamLid": "NATP1", "inService": { "enabled": true, "message": "" }, "lowThreshold": null, "forecastReliability": "Forecasts are issued routinely year-round.", "TruncateObs": "-1", "TruncateFcst": "-1", "ObservedFloodCategory": "no_flooding", "ForecastFloodCategory": "no_flooding" }