{ "lid": "TREN4", "usgsId": "01463500", "reachId": "2590277", "name": "Delaware River at Trenton", "description": "", "rfc": { "abbreviation": "MARFC", "name": "Middle Atlantic River Forecast Center" }, "wfo": { "abbreviation": "PHI", "name": "Mount Holly" }, "state": { "abbreviation": "NJ", "name": "New Jersey" }, "county": "Mercer", "timeZone": "EST5EDT", "latitude": 40.221666666667, "longitude": -74.778055555556, "pedts": { "observed": "HGIRG", "forecast": "HGIFF" }, "status": { "observed": { "primary": 11.39, "primaryUnit": "ft", "secondary": 22.1, "secondaryUnit": "kcfs", "floodCategory": "no_flooding", "validTime": "2026-04-05T06:15:00Z" }, "forecast": { "primary": 11.2, "primaryUnit": "ft", "secondary": 20.6, "secondaryUnit": "kcfs", "floodCategory": "no_flooding", "validTime": "2026-04-05T12:00:00Z" } }, "flood": { "stageUnits": "ft", "flowUnits": "cfs", "categories": { "major": { "stage": 25, "flow": -9999 }, "moderate": { "stage": 23, "flow": -9999 }, "minor": { "stage": 20, "flow": -9999 }, "action": { "stage": 17, "flow": 60900 } }, "lro": { "minorCS": "0.06", "moderateCS": "< 0.05", "majorCS": "< 0.05", "producedTime": "2026-03-28T23:23:32Z", "interval": "AMJ" }, "crests": { "historic": [ { "occurredTime": "1904-03-08T00:00:00Z", "stage": 30.6, "flow": 0, "preliminary": "R", "olddatum": false }, { "occurredTime": "1955-08-20T00:00:00Z", "stage": 28.6000003814697, "flow": 329000, "preliminary": "O", "olddatum": false }, { "occurredTime": "1903-10-11T00:00:00Z", "stage": 28.5, "flow": 295000, "preliminary": "O", "olddatum": false }, { "occurredTime": "2005-04-04T14:30:00Z", "stage": 25.33, "flow": 242000, "preliminary": "O", "olddatum": false }, { "occurredTime": "2006-06-29T20:45:00Z", "stage": 25.09, "flow": 237000, "preliminary": "O", "olddatum": false }, { "occurredTime": "1936-03-19T00:00:00Z", "stage": 24.43, "flow": 227000, "preliminary": "O", "olddatum": false }, { "occurredTime": "1902-03-02T00:00:00Z", "stage": 23.6, "flow": 214000, "preliminary": "O", "olddatum": false }, { "occurredTime": "2004-09-19T20:45:00Z", "stage": 23.41, "flow": 201000, "preliminary": "O", "olddatum": false }, { "occurredTime": "1996-01-20T01:30:00Z", "stage": 22.2, "flow": 179000, "preliminary": "O", "olddatum": false }, { "occurredTime": "2011-09-09T16:45:00Z", "stage": 22.16, "flow": 176600, "preliminary": "O", "olddatum": false }, { "occurredTime": "1942-05-24T00:00:00Z", "stage": 21.12, "flow": 161200, "preliminary": "O", "olddatum": false }, { "occurredTime": "1913-03-28T00:00:00Z", "stage": 21.1, "flow": 160000, "preliminary": "O", "olddatum": false }, { "occurredTime": "1925-02-13T00:00:00Z", "stage": 20.8, "flow": 154000, "preliminary": "O", "olddatum": false }, { "occurredTime": "2014-01-09T00:30:00Z", "stage": 20.76, "flow": 150200, "preliminary": "O", "olddatum": false }, { "occurredTime": "2021-09-03T01:45:00Z", "stage": 20.76, "flow": 150359, "preliminary": "O", "olddatum": false }, { "occurredTime": "1984-05-30T00:00:00Z", "stage": 20.64, "flow": 152000, "preliminary": "O", "olddatum": false }, { "occurredTime": "1940-04-01T00:00:00Z", "stage": 20.62, "flow": 151600, "preliminary": "O", "olddatum": false }, { "occurredTime": "2011-03-12T12:30:00Z", "stage": 20.59, "flow": 147800, "preliminary": "O", "olddatum": false }, { "occurredTime": "2011-08-29T19:30:00Z", "stage": 20.49, "flow": 146000, "preliminary": "O", "olddatum": false }, { "occurredTime": "1933-08-25T00:00:00Z", "stage": 20.43, "flow": 147000, "preliminary": "O", "olddatum": false }, { "occurredTime": "1986-03-16T00:00:00Z", "stage": 20.22, "flow": 140000, "preliminary": "O", "olddatum": false }, { "occurredTime": "1914-03-29T00:00:00Z", "stage": 20.2, "flow": 143000, "preliminary": "O", "olddatum": false }, { "occurredTime": "1952-12-12T00:00:00Z", "stage": 20.07, "flow": 139000, "preliminary": "O", "olddatum": false }, { "occurredTime": "2018-01-15T18:30:00Z", "stage": 19.93, "flow": 0, "preliminary": "P", "olddatum": false }, { "occurredTime": "1973-06-30T00:00:00Z", "stage": 19.78, "flow": 135000, "preliminary": "O", "olddatum": false }, { "occurredTime": "1996-12-03T15:30:00Z", "stage": 17.88, "flow": 101000, "preliminary": "O", "olddatum": false }, { "occurredTime": "1972-06-23T00:00:00Z", "stage": 17.86, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2010-10-02T15:30:00Z", "stage": 17.85, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2006-01-20T01:00:00Z", "stage": 17.23, "flow": 91400, "preliminary": "P", "olddatum": false }, { "occurredTime": "1996-11-10T14:45:00Z", "stage": 17.02, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2003-10-30T20:30:00Z", "stage": 16.79, "flow": 85000, "preliminary": "O", "olddatum": false }, { "occurredTime": "2014-05-01T02:30:00Z", "stage": 16.46, "flow": 80240, "preliminary": "O", "olddatum": false }, { "occurredTime": "1998-05-12T16:00:00Z", "stage": 15.67, "flow": 69500, "preliminary": "O", "olddatum": false } ], "recent": [ { "occurredTime": "2021-09-03T01:45:00Z", "stage": 20.76, "flow": 150359, "preliminary": "O", "olddatum": false }, { "occurredTime": "2018-01-15T18:30:00Z", "stage": 19.93, "flow": 0, "preliminary": "P", "olddatum": false }, { "occurredTime": "2014-05-01T02:30:00Z", "stage": 16.46, "flow": 80240, "preliminary": "O", "olddatum": false }, { "occurredTime": "2014-01-09T00:30:00Z", "stage": 20.76, "flow": 150200, "preliminary": "O", "olddatum": false }, { "occurredTime": "2011-09-09T16:45:00Z", "stage": 22.16, "flow": 176600, "preliminary": "O", "olddatum": false }, { "occurredTime": "2011-08-29T19:30:00Z", "stage": 20.49, "flow": 146000, "preliminary": "O", "olddatum": false }, { "occurredTime": "2011-03-12T12:30:00Z", "stage": 20.59, "flow": 147800, "preliminary": "O", "olddatum": false }, { "occurredTime": "2010-10-02T15:30:00Z", "stage": 17.85, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2006-06-29T20:45:00Z", "stage": 25.09, "flow": 237000, "preliminary": "O", "olddatum": false }, { "occurredTime": "2006-01-20T01:00:00Z", "stage": 17.23, "flow": 91400, "preliminary": "P", "olddatum": false }, { "occurredTime": "2005-04-04T14:30:00Z", "stage": 25.33, "flow": 242000, "preliminary": "O", "olddatum": false }, { "occurredTime": "2004-09-19T20:45:00Z", "stage": 23.41, "flow": 201000, "preliminary": "O", "olddatum": false }, { "occurredTime": "2003-10-30T20:30:00Z", "stage": 16.79, "flow": 85000, "preliminary": "O", "olddatum": false }, { "occurredTime": "1998-05-12T16:00:00Z", "stage": 15.67, "flow": 69500, "preliminary": "O", "olddatum": false }, { "occurredTime": "1996-12-03T15:30:00Z", "stage": 17.88, "flow": 101000, "preliminary": "O", "olddatum": false }, { "occurredTime": "1996-11-10T14:45:00Z", "stage": 17.02, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1996-01-20T01:30:00Z", "stage": 22.2, "flow": 179000, "preliminary": "O", "olddatum": false }, { "occurredTime": "1986-03-16T00:00:00Z", "stage": 20.22, "flow": 140000, "preliminary": "O", "olddatum": false }, { "occurredTime": "1984-05-30T00:00:00Z", "stage": 20.64, "flow": 152000, "preliminary": "O", "olddatum": false }, { "occurredTime": "1973-06-30T00:00:00Z", "stage": 19.78, "flow": 135000, "preliminary": "O", "olddatum": false }, { "occurredTime": "1972-06-23T00:00:00Z", "stage": 17.86, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1955-08-20T00:00:00Z", "stage": 28.6000003814697, "flow": 329000, "preliminary": "O", "olddatum": false }, { "occurredTime": "1952-12-12T00:00:00Z", "stage": 20.07, "flow": 139000, "preliminary": "O", "olddatum": false }, { "occurredTime": "1942-05-24T00:00:00Z", "stage": 21.12, "flow": 161200, "preliminary": "O", "olddatum": false }, { "occurredTime": "1940-04-01T00:00:00Z", "stage": 20.62, "flow": 151600, "preliminary": "O", "olddatum": false }, { "occurredTime": "1936-03-19T00:00:00Z", "stage": 24.43, "flow": 227000, "preliminary": "O", "olddatum": false }, { "occurredTime": "1933-08-25T00:00:00Z", "stage": 20.43, "flow": 147000, "preliminary": "O", "olddatum": false }, { "occurredTime": "1925-02-13T00:00:00Z", "stage": 20.8, "flow": 154000, "preliminary": "O", "olddatum": false }, { "occurredTime": "1914-03-29T00:00:00Z", "stage": 20.2, "flow": 143000, "preliminary": "O", "olddatum": false }, { "occurredTime": "1913-03-28T00:00:00Z", "stage": 21.1, "flow": 160000, "preliminary": "O", "olddatum": false }, { "occurredTime": "1904-03-08T00:00:00Z", "stage": 30.6, "flow": 0, "preliminary": "R", "olddatum": false }, { "occurredTime": "1903-10-11T00:00:00Z", "stage": 28.5, "flow": 295000, "preliminary": "O", "olddatum": false }, { "occurredTime": "1902-03-02T00:00:00Z", "stage": 23.6, "flow": 214000, "preliminary": "O", "olddatum": false } ] }, "lowWaters": { "historic": [] }, "impacts": [ { "stage": 25, "statement": "The Delaware River meets the Delaware Canal, backfilling the Rivermawr and Flats neighborhoods making all roads east of the canal impassable." }, { "stage": 24.5, "statement": "Carr's Lane in Yardley begins to flood." }, { "stage": 23, "statement": "North and South Bell Avenues in Yardley begin to flood." }, { "stage": 22, "statement": "Route 32 in Yardley is flooded in both directions. Up to two feet of water covers portions of Morgan Avenue, Brown Street, Maple Avenue, and Fuld Avenue." }, { "stage": 21.5, "statement": "Ferry Street in Yardley begins to flood." }, { "stage": 20, "statement": "Houses on Brown Street in Yardley begin to take on water. Houses on Afton Avenue also take on water. Southbound lanes are closed along stretches of Route 29 in Trenton. Route 32 North is closed in Yardley borough. River Road (Route 32), north of Woodside Road and south of Mt. Eyre Road, in Lower Makefield Township, begins to flood." }, { "stage": 19.5, "statement": "Morgan Avenue in Yardley Borough begins to flood. River Road (PA Rt 32) at East Ferry Road in Lower Makefield Township begins to flood." }, { "stage": 18.5, "statement": "PA Route 32 South at East College Avenue in Yardley borough begins to flood. Water begins to enter Level 1 of the parking garage at the State Capital Building. Sections of Stacey Park in Trenton are closed. " }, { "stage": 18, "statement": "PA Route 32 North is closed between Brown Street and Maple Avenue." }, { "stage": 17, "statement": "PA Route 32 North in Yardley Borough begins to flood between Brown Street and Maple Avenue." } ] }, "images": { "probability": { "weekint": { "stage": "https://water.noaa.gov/resources/probabilistic/exceedance/TREN4.SSTG.prob.weekint.gif", "flow": "https://water.noaa.gov/resources/probabilistic/exceedance/TREN4.QINE.prob.weekint.gif", "volume": "https://water.noaa.gov/resources/probabilistic/exceedance/TREN4.volume.prob.weekint.gif" }, "entperiod": { "stage": "https://water.noaa.gov/resources/probabilistic/exceedance/TREN4.SSTG.exceed.90day.gif", "flow": "https://water.noaa.gov/resources/probabilistic/exceedance/TREN4.QINE.exceed.90day.gif", "volume": "" }, "shortrange": "https://water.noaa.gov/resources/probabilistic/short_term/TREN4.shortrange.hefs.png" }, "hydrograph": { "default": "https://water.noaa.gov/resources/hydrographs/tren4_hg.png", "floodcat": "https://water.noaa.gov/resources/hydrographs/tren4_record.png" }, "photos": [ { "id": "12459856827157254638", "type": "Feature", "geometry": { "type": "Point", "coordinates": [ 40.221666666667, -74.778055555556 ] }, "properties": { "image": "https://water.noaa.gov/resources/photos/tren4/12459856827157254638.jpeg", "caption": "Ice at the Trenton Gage" } } ] }, "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": "01463500", "title": "Observations courtesy of U.S. Geological Survey", "url": "https://waterdata.usgs.gov/nwis/inventory/?site_no=01463500" } ], "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": 0 } ] }, "horizontal": { "value": [] }, "notes": { "value": [] } }, "inundation": { "enabled": true, "url": "https://mapservices.weather.noaa.gov/static/rest/services/NWS_FIM/FIM_tren4/MapServer", "zeroDatum": { "value": -1.05, "datum": "NAVD88" }, "downloads": { "depthGrids": "https://water.noaa.gov/resources/downloads/fim/tren4/tren4_shapefiles.zip", "images": "https://water.noaa.gov/resources/downloads/fim/tren4/tren4_images.zip", "kmz": "https://water.noaa.gov/resources/downloads/fim/tren4/tren4_kmz.zip" }, "siteSpecificInfo": "These maps represent unobstructed flow conditions and may be \r\nunrepresentative when ice jams and/or debris are in place.", "dataAttribution": [ { "text": "USGS", "title": "Observations courtesy of the US Geological Survey", "url": "", "image": "https://water.noaa.gov/resources/fim/" }, { "text": "State", "title": "USACE Philadelphia District", "url": "http://www.nap.usace.army.mil/", "image": "https://water.noaa.gov/resources/fim/" } ] }, "upstreamLid": "WASN4", "downstreamLid": "NBLP1", "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" }