{ "lid": "MNVN4", "usgsId": "01400500", "reachId": "9513852", "name": "Raritan River at Manville", "description": "", "rfc": { "abbreviation": "MARFC", "name": "Middle Atlantic River Forecast Center" }, "wfo": { "abbreviation": "PHI", "name": "Mount Holly" }, "state": { "abbreviation": "NJ", "name": "New Jersey" }, "county": "Somerset", "timeZone": "EST5EDT", "latitude": 40.555555555556, "longitude": -74.582777777778, "pedts": { "observed": "HGIR2", "forecast": "HGIFF" }, "status": { "observed": { "primary": 4.39, "primaryUnit": "ft", "secondary": 0.403, "secondaryUnit": "kcfs", "floodCategory": "no_flooding", "validTime": "2026-09-18T14:15:00Z" }, "forecast": { "primary": 6.6, "primaryUnit": "ft", "secondary": 2.68, "secondaryUnit": "kcfs", "floodCategory": "no_flooding", "validTime": "2026-09-21T12:00:00Z" } }, "flood": { "stageUnits": "ft", "flowUnits": "cfs", "categories": { "major": { "stage": 20, "flow": -9999 }, "moderate": { "stage": 17, "flow": -9999 }, "minor": { "stage": 14, "flow": -9999 }, "action": { "stage": 12, "flow": 9100 } }, "lro": { "minorCS": "0.12", "moderateCS": "0.06", "majorCS": "< 0.05", "producedTime": "2026-08-28T23:22:47Z", "interval": "SON" }, "crests": { "historic": [ { "occurredTime": "2021-09-02T13:15:00Z", "stage": 27.66, "flow": 90940, "preliminary": "R", "olddatum": false }, { "occurredTime": "1999-09-17T02:00:00Z", "stage": 27.1, "flow": 77600, "preliminary": "O", "olddatum": false }, { "occurredTime": "2011-08-28T20:00:00Z", "stage": 26.24, "flow": 55900, "preliminary": "O", "olddatum": false }, { "occurredTime": "1971-08-28T00:00:00Z", "stage": 23.8, "flow": 36300, "preliminary": "O", "olddatum": false }, { "occurredTime": "1996-10-20T03:15:00Z", "stage": 22.41, "flow": 32000, "preliminary": "O", "olddatum": false }, { "occurredTime": "2007-04-16T12:00:00Z", "stage": 22.3, "flow": 30400, "preliminary": "O", "olddatum": false }, { "occurredTime": "1955-08-19T00:00:00Z", "stage": 21.8, "flow": 34600, "preliminary": "O", "olddatum": false }, { "occurredTime": "2010-03-14T13:15:00Z", "stage": 21.57, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1938-09-22T00:00:00Z", "stage": 20.42, "flow": 36100, "preliminary": "O", "olddatum": false }, { "occurredTime": "2024-01-10T17:30:00Z", "stage": 20.04, "flow": 29160, "preliminary": "O", "olddatum": false }, { "occurredTime": "2014-05-01T11:45:00Z", "stage": 19.99, "flow": 29950, "preliminary": "O", "olddatum": false }, { "occurredTime": "1984-07-07T00:00:00Z", "stage": 19.95, "flow": 27300, "preliminary": "O", "olddatum": false }, { "occurredTime": "1955-08-13T00:00:00Z", "stage": 19.9, "flow": 26600, "preliminary": "O", "olddatum": false }, { "occurredTime": "2023-12-19T01:00:00Z", "stage": 19.84, "flow": 28520, "preliminary": "O", "olddatum": false }, { "occurredTime": "1996-01-20T04:30:00Z", "stage": 19.82, "flow": 24300, "preliminary": "O", "olddatum": false }, { "occurredTime": "1955-10-15T00:00:00Z", "stage": 19.6, "flow": 26200, "preliminary": "O", "olddatum": false }, { "occurredTime": "2011-09-08T21:15:00Z", "stage": 19.18, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1983-04-16T00:00:00Z", "stage": 18.39, "flow": 22800, "preliminary": "O", "olddatum": false }, { "occurredTime": "1972-06-23T00:00:00Z", "stage": 17.89, "flow": 21800, "preliminary": "O", "olddatum": false }, { "occurredTime": "1984-04-05T00:00:00Z", "stage": 17.5, "flow": 20500, "preliminary": "O", "olddatum": false }, { "occurredTime": "2011-04-17T15:00:00Z", "stage": 17.3, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2005-04-03T07:30:00Z", "stage": 16.96, "flow": 19300, "preliminary": "O", "olddatum": false }, { "occurredTime": "1984-05-30T00:00:00Z", "stage": 16.78, "flow": 18800, "preliminary": "O", "olddatum": false }, { "occurredTime": "2021-08-24T00:30:00Z", "stage": 16.61, "flow": 19430, "preliminary": "O", "olddatum": false }, { "occurredTime": "2003-12-11T23:30:00Z", "stage": 16.6, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1982-01-05T00:00:00Z", "stage": 16.6, "flow": 17000, "preliminary": "O", "olddatum": false }, { "occurredTime": "2023-12-28T21:30:00Z", "stage": 16.45, "flow": 19100, "preliminary": "O", "olddatum": false }, { "occurredTime": "1989-09-21T00:00:00Z", "stage": 16.24, "flow": 16200, "preliminary": "O", "olddatum": false }, { "occurredTime": "2018-11-25T20:45:00Z", "stage": 16.12, "flow": 18260, "preliminary": "O", "olddatum": false }, { "occurredTime": "2022-04-08T15:00:00Z", "stage": 15.99, "flow": 17980, "preliminary": "O", "olddatum": false }, { "occurredTime": "1996-12-02T17:45:00Z", "stage": 15.67, "flow": 15300, "preliminary": "O", "olddatum": false }, { "occurredTime": "1994-01-29T01:30:00Z", "stage": 15.55, "flow": 14900, "preliminary": "O", "olddatum": false }, { "occurredTime": "1992-12-11T23:00:00Z", "stage": 15.13, "flow": 14500, "preliminary": "O", "olddatum": false }, { "occurredTime": "1994-03-10T23:00:00Z", "stage": 14.95, "flow": 12900, "preliminary": "O", "olddatum": false }, { "occurredTime": "2011-03-11T19:30:00Z", "stage": 14.94, "flow": 15880, "preliminary": "O", "olddatum": false }, { "occurredTime": "2011-03-07T17:30:00Z", "stage": 14.89, "flow": 15780, "preliminary": "O", "olddatum": false }, { "occurredTime": "1999-03-22T14:15:00Z", "stage": 14.8, "flow": 14500, "preliminary": "O", "olddatum": false }, { "occurredTime": "1996-12-14T18:30:00Z", "stage": 14.8, "flow": 13200, "preliminary": "O", "olddatum": false }, { "occurredTime": "2010-03-31T06:45:00Z", "stage": 14.76, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2020-12-25T21:45:00Z", "stage": 14.68, "flow": 15360, "preliminary": "O", "olddatum": false }, { "occurredTime": "1993-12-05T19:45:00Z", "stage": 14.48, "flow": 14200, "preliminary": "O", "olddatum": false }, { "occurredTime": "1996-01-28T06:00:00Z", "stage": 14.3, "flow": 12100, "preliminary": "O", "olddatum": false }, { "occurredTime": "2020-12-01T12:15:00Z", "stage": 14.02, "flow": 14040, "preliminary": "O", "olddatum": false }, { "occurredTime": "2021-07-18T14:45:00Z", "stage": 14, "flow": 14000, "preliminary": "O", "olddatum": false }, { "occurredTime": "1993-03-24T18:45:00Z", "stage": 13.32, "flow": 10800, "preliminary": "O", "olddatum": false }, { "occurredTime": "1999-01-19T04:00:00Z", "stage": 13, "flow": 11600, "preliminary": "O", "olddatum": false }, { "occurredTime": "1998-01-24T06:00:00Z", "stage": 12.26, "flow": 10000, "preliminary": "O", "olddatum": false }, { "occurredTime": "1998-04-10T11:45:00Z", "stage": 12.26, "flow": 10900, "preliminary": "O", "olddatum": false } ], "recent": [ { "occurredTime": "2024-01-10T17:30:00Z", "stage": 20.04, "flow": 29160, "preliminary": "O", "olddatum": false }, { "occurredTime": "2023-12-28T21:30:00Z", "stage": 16.45, "flow": 19100, "preliminary": "O", "olddatum": false }, { "occurredTime": "2023-12-19T01:00:00Z", "stage": 19.84, "flow": 28520, "preliminary": "O", "olddatum": false }, { "occurredTime": "2022-04-08T15:00:00Z", "stage": 15.99, "flow": 17980, "preliminary": "O", "olddatum": false }, { "occurredTime": "2021-09-02T13:15:00Z", "stage": 27.66, "flow": 90940, "preliminary": "R", "olddatum": false }, { "occurredTime": "2021-08-24T00:30:00Z", "stage": 16.61, "flow": 19430, "preliminary": "O", "olddatum": false }, { "occurredTime": "2021-07-18T14:45:00Z", "stage": 14, "flow": 14000, "preliminary": "O", "olddatum": false }, { "occurredTime": "2020-12-25T21:45:00Z", "stage": 14.68, "flow": 15360, "preliminary": "O", "olddatum": false }, { "occurredTime": "2020-12-01T12:15:00Z", "stage": 14.02, "flow": 14040, "preliminary": "O", "olddatum": false }, { "occurredTime": "2018-11-25T20:45:00Z", "stage": 16.12, "flow": 18260, "preliminary": "O", "olddatum": false }, { "occurredTime": "2014-05-01T11:45:00Z", "stage": 19.99, "flow": 29950, "preliminary": "O", "olddatum": false }, { "occurredTime": "2011-09-08T21:15:00Z", "stage": 19.18, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2011-08-28T20:00:00Z", "stage": 26.24, "flow": 55900, "preliminary": "O", "olddatum": false }, { "occurredTime": "2011-04-17T15:00:00Z", "stage": 17.3, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2011-03-11T19:30:00Z", "stage": 14.94, "flow": 15880, "preliminary": "O", "olddatum": false }, { "occurredTime": "2011-03-07T17:30:00Z", "stage": 14.89, "flow": 15780, "preliminary": "O", "olddatum": false }, { "occurredTime": "2010-03-31T06:45:00Z", "stage": 14.76, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2010-03-14T13:15:00Z", "stage": 21.57, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2007-04-16T12:00:00Z", "stage": 22.3, "flow": 30400, "preliminary": "O", "olddatum": false }, { "occurredTime": "2005-04-03T07:30:00Z", "stage": 16.96, "flow": 19300, "preliminary": "O", "olddatum": false }, { "occurredTime": "2003-12-11T23:30:00Z", "stage": 16.6, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1999-09-17T02:00:00Z", "stage": 27.1, "flow": 77600, "preliminary": "O", "olddatum": false }, { "occurredTime": "1999-03-22T14:15:00Z", "stage": 14.8, "flow": 14500, "preliminary": "O", "olddatum": false }, { "occurredTime": "1999-01-19T04:00:00Z", "stage": 13, "flow": 11600, "preliminary": "O", "olddatum": false }, { "occurredTime": "1998-04-10T11:45:00Z", "stage": 12.26, "flow": 10900, "preliminary": "O", "olddatum": false }, { "occurredTime": "1998-01-24T06:00:00Z", "stage": 12.26, "flow": 10000, "preliminary": "O", "olddatum": false }, { "occurredTime": "1996-12-14T18:30:00Z", "stage": 14.8, "flow": 13200, "preliminary": "O", "olddatum": false }, { "occurredTime": "1996-12-02T17:45:00Z", "stage": 15.67, "flow": 15300, "preliminary": "O", "olddatum": false }, { "occurredTime": "1996-10-20T03:15:00Z", "stage": 22.41, "flow": 32000, "preliminary": "O", "olddatum": false }, { "occurredTime": "1996-01-28T06:00:00Z", "stage": 14.3, "flow": 12100, "preliminary": "O", "olddatum": false }, { "occurredTime": "1996-01-20T04:30:00Z", "stage": 19.82, "flow": 24300, "preliminary": "O", "olddatum": false }, { "occurredTime": "1994-03-10T23:00:00Z", "stage": 14.95, "flow": 12900, "preliminary": "O", "olddatum": false }, { "occurredTime": "1994-01-29T01:30:00Z", "stage": 15.55, "flow": 14900, "preliminary": "O", "olddatum": false }, { "occurredTime": "1993-12-05T19:45:00Z", "stage": 14.48, "flow": 14200, "preliminary": "O", "olddatum": false }, { "occurredTime": "1993-03-24T18:45:00Z", "stage": 13.32, "flow": 10800, "preliminary": "O", "olddatum": false }, { "occurredTime": "1992-12-11T23:00:00Z", "stage": 15.13, "flow": 14500, "preliminary": "O", "olddatum": false }, { "occurredTime": "1989-09-21T00:00:00Z", "stage": 16.24, "flow": 16200, "preliminary": "O", "olddatum": false }, { "occurredTime": "1984-07-07T00:00:00Z", "stage": 19.95, "flow": 27300, "preliminary": "O", "olddatum": false }, { "occurredTime": "1984-05-30T00:00:00Z", "stage": 16.78, "flow": 18800, "preliminary": "O", "olddatum": false }, { "occurredTime": "1984-04-05T00:00:00Z", "stage": 17.5, "flow": 20500, "preliminary": "O", "olddatum": false }, { "occurredTime": "1983-04-16T00:00:00Z", "stage": 18.39, "flow": 22800, "preliminary": "O", "olddatum": false }, { "occurredTime": "1982-01-05T00:00:00Z", "stage": 16.6, "flow": 17000, "preliminary": "O", "olddatum": false }, { "occurredTime": "1972-06-23T00:00:00Z", "stage": 17.89, "flow": 21800, "preliminary": "O", "olddatum": false }, { "occurredTime": "1971-08-28T00:00:00Z", "stage": 23.8, "flow": 36300, "preliminary": "O", "olddatum": false }, { "occurredTime": "1955-10-15T00:00:00Z", "stage": 19.6, "flow": 26200, "preliminary": "O", "olddatum": false }, { "occurredTime": "1955-08-19T00:00:00Z", "stage": 21.8, "flow": 34600, "preliminary": "O", "olddatum": false }, { "occurredTime": "1955-08-13T00:00:00Z", "stage": 19.9, "flow": 26600, "preliminary": "O", "olddatum": false }, { "occurredTime": "1938-09-22T00:00:00Z", "stage": 20.42, "flow": 36100, "preliminary": "O", "olddatum": false } ] }, "lowWaters": { "historic": [] }, "impacts": [ { "stage": 20, "statement": "Flooding becomes widespread across Manville. Flooding expands between Dukes Parkway and Brooks Blvd. The amount of flooding can vary from event to event and can be affected by the amount of water in the Millstone." }, { "stage": 19, "statement": "South Bridge Street in Somerville is closed. The amount of flooding can vary from event to event and can be affected by the amount of water in the Millstone. Old York Road and Robert Street floods. Old York Road and Park Drive floods." }, { "stage": 18, "statement": "East Dukes Parkway and several bridges in Manville are flooded. Roads throughout the area are closed due to high water. The amount of flooding can vary from event to event and can be affected by the amount of water in the Millstone." }, { "stage": 17, "statement": "Street and roadway flooding increases across the Manville area. The Van Veghten Bridge and Main Street in Manville are flooded as well as 5th Street in Somerville. The amount of flooding can vary from event to event and can be affected by the amount of water in the Millstone." }, { "stage": 16, "statement": "Lincoln Avenue in the Lost Valley section of Manville floods." }, { "stage": 15, "statement": "Dukes Parkway begins to flood in Hillsborough." }, { "stage": 13, "statement": "Southside Avenue in Somerville floods." }, { "stage": 12, "statement": "Cautionary/Action stage is reached. Roads and trails flood within Dukes Park." }, { "stage": 11, "statement": "At this level, inundation begins in Dukes Park in Manville." } ] }, "images": { "probability": { "weekint": { "stage": "https://water.noaa.gov/resources/probabilistic/exceedance/MNVN4.SSTG.prob.weekint.gif", "flow": "https://water.noaa.gov/resources/probabilistic/exceedance/MNVN4.QINE.prob.weekint.gif", "volume": "https://water.noaa.gov/resources/probabilistic/exceedance/MNVN4.volume.prob.weekint.gif" }, "entperiod": { "stage": "https://water.noaa.gov/resources/probabilistic/exceedance/MNVN4.SSTG.exceed.90day.gif", "flow": "https://water.noaa.gov/resources/probabilistic/exceedance/MNVN4.QINE.exceed.90day.gif", "volume": "" }, "shortrange": "https://water.noaa.gov/resources/probabilistic/short_term/MNVN4.shortrange.hefs.png" }, "hydrograph": { "default": "https://water.noaa.gov/resources/hydrographs/mnvn4_hg.png", "floodcat": "https://water.noaa.gov/resources/hydrographs/mnvn4_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": "01400500", "title": "Observations courtesy of U.S. Geological Survey", "url": "https://waterdata.usgs.gov/nwis/inventory/?site_no=01400500" } ], "impactsLowWaters": [], "normalThreshold": { "value": 0, "units": "ft" }, "hydronotes": [], "datums": { "vertical": { "value": [ { "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": 20.61 } ] }, "horizontal": { "value": [] }, "notes": { "value": [] } }, "inundation": { "enabled": true, "url": "https://mapservices.weather.noaa.gov/static/rest/services/NWS_FIM/FIM_mnvn4/MapServer", "zeroDatum": { "value": 19.7, "datum": "NAVD88" }, "downloads": { "depthGrids": "https://water.noaa.gov/resources/downloads/fim/mnvn4/mnvn4_shapefiles.zip", "images": "https://water.noaa.gov/resources/downloads/fim/mnvn4/mnvn4_images.zip", "kmz": "https://water.noaa.gov/resources/downloads/fim/mnvn4/mnvn4_kmz.zip" }, "siteSpecificInfo": "", "dataAttribution": [ { "text": "USGS", "title": "Observations courtesy of the US Geological Survey", "url": "", "image": "https://water.noaa.gov/resources/fim/" }, { "text": "State", "title": "NJ State Partner", "url": "", "image": "https://water.noaa.gov/resources/fim/" }, { "text": "Partner1", "title": "Federal Emergency Management Agency, Region II", "url": "http://www.fema.gov/", "image": "https://water.noaa.gov/resources/fim/mnvn4-partner-01.png" }, { "text": "Partner2", "title": "New Jersey Department of Environmental Protection", "url": "http://www.nj.gov/dep/", "image": "https://water.noaa.gov/resources/fim/mnvn4-partner-02.png" } ] }, "upstreamLid": "", "downstreamLid": "BDKN4", "inService": { "enabled": true, "message": "" }, "lowThreshold": { "units": "ft", "value": 0 }, "forecastReliability": "Forecasts are issued routinely year-round.", "TruncateObs": "-1", "TruncateFcst": "3", "ObservedFloodCategory": "no_flooding", "ForecastFloodCategory": "no_flooding" }