{
  "lid": "HRCM7",
  "usgsId": "",
  "reachId": "3629127",
  "name": "Mississippi River at Herculaneum",
  "description": "",
  "rfc": {
    "abbreviation": "NCRFC",
    "name": "North Central River Forecast Center"
  },
  "wfo": {
    "abbreviation": "LSX",
    "name": "St. Charles"
  },
  "state": {
    "abbreviation": "MO",
    "name": "Missouri"
  },
  "county": "Jefferson",
  "timeZone": "CST6CDT",
  "latitude": 38.26606111,
  "longitude": -90.37305556,
  "pedts": {
    "observed": "HGIRG",
    "forecast": "HGIFF"
  },
  "status": {
    "observed": {
      "primary": 5.94,
      "primaryUnit": "ft",
      "secondary": -999,
      "secondaryUnit": "kcfs",
      "floodCategory": "no_flooding",
      "validTime": "2026-10-24T16:30:00Z"
    },
    "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": 37,
        "flow": -9999
      },
      "moderate": {
        "stage": 32,
        "flow": -9999
      },
      "minor": {
        "stage": 26,
        "flow": -9999
      },
      "action": {
        "stage": 24,
        "flow": -9999
      }
    },
    "lro": {
      "minorCS": "0.09",
      "moderateCS": "0.06",
      "majorCS": "0.05",
      "producedTime": "2026-10-23T17:02:15Z",
      "interval": "OND"
    },
    "crests": {
      "historic": [
        {
          "occurredTime": "2024-07-10T11:00:00Z",
          "stage": 29.79,
          "flow": 0,
          "preliminary": "O",
          "olddatum": false
        },
        {
          "occurredTime": "2021-03-21T06:00:00Z",
          "stage": 29.31,
          "flow": 0,
          "preliminary": "O",
          "olddatum": false
        },
        {
          "occurredTime": "2022-05-08T02:00:00Z",
          "stage": 27.9,
          "flow": 0,
          "preliminary": "O",
          "olddatum": false
        },
        {
          "occurredTime": "2021-06-29T03:30:00Z",
          "stage": 27.41,
          "flow": 0,
          "preliminary": "O",
          "olddatum": false
        },
        {
          "occurredTime": "2026-05-01T17:00:00Z",
          "stage": 27.12,
          "flow": 0,
          "preliminary": "O",
          "olddatum": false
        },
        {
          "occurredTime": "2024-05-02T11:30:00Z",
          "stage": 27.1,
          "flow": 0,
          "preliminary": "O",
          "olddatum": false
        },
        {
          "occurredTime": "2024-05-11T13:00:00Z",
          "stage": 26.39,
          "flow": 0,
          "preliminary": "O",
          "olddatum": false
        },
        {
          "occurredTime": "2024-07-17T05:30:00Z",
          "stage": 26.02,
          "flow": 0,
          "preliminary": "O",
          "olddatum": false
        }
      ],
      "recent": [
        {
          "occurredTime": "2026-05-01T17:00:00Z",
          "stage": 27.12,
          "flow": 0,
          "preliminary": "O",
          "olddatum": false
        },
        {
          "occurredTime": "2024-07-17T05:30:00Z",
          "stage": 26.02,
          "flow": 0,
          "preliminary": "O",
          "olddatum": false
        },
        {
          "occurredTime": "2024-07-10T11:00:00Z",
          "stage": 29.79,
          "flow": 0,
          "preliminary": "O",
          "olddatum": false
        },
        {
          "occurredTime": "2024-05-11T13:00:00Z",
          "stage": 26.39,
          "flow": 0,
          "preliminary": "O",
          "olddatum": false
        },
        {
          "occurredTime": "2024-05-02T11:30:00Z",
          "stage": 27.1,
          "flow": 0,
          "preliminary": "O",
          "olddatum": false
        },
        {
          "occurredTime": "2022-05-08T02:00:00Z",
          "stage": 27.9,
          "flow": 0,
          "preliminary": "O",
          "olddatum": false
        },
        {
          "occurredTime": "2021-06-29T03:30:00Z",
          "stage": 27.41,
          "flow": 0,
          "preliminary": "O",
          "olddatum": false
        },
        {
          "occurredTime": "2021-03-21T06:00:00Z",
          "stage": 29.31,
          "flow": 0,
          "preliminary": "O",
          "olddatum": false
        }
      ]
    },
    "lowWaters": {
      "historic": [
        {
          "occurredTime": "2026-01-21T00:00:00Z",
          "stage": -7.41,
          "flow": -9999,
          "statement": "21:00 UTC."
        },
        {
          "occurredTime": "2025-12-17T00:00:00Z",
          "stage": -6.56,
          "flow": -9999,
          "statement": ""
        },
        {
          "occurredTime": "2022-01-28T00:00:00Z",
          "stage": -4.96,
          "flow": -9999,
          "statement": "Ya think USACE could have set gage zero about 5-7 feet lower?"
        },
        {
          "occurredTime": "2021-08-26T00:00:00Z",
          "stage": -2.44,
          "flow": -9999,
          "statement": ""
        }
      ]
    },
    "impacts": [
      {
        "stage": 47,
        "statement": "Near this height, the Herculaneum wastewater pumping station on Station Street begins flooding."
      },
      {
        "stage": 46,
        "statement": "Near this height, the New South bridge will begin flooding on the bridge deck at the south end of the bridge."
      },
      {
        "stage": 44.5,
        "statement": "Near this height, the New South bridge will begin flooding at the south approach to the bridge."
      },
      {
        "stage": 38.6,
        "statement": "At this height, the railroad tracks at the Herculaneum riverfront will be inundated."
      },
      {
        "stage": 36.5,
        "statement": "At this height, the ground adjacent to the office trailer at the Doe Run barge unloader will be inundated."
      },
      {
        "stage": 35.8,
        "statement": "Near this height, all 3 of the ball fields at Kades Playground will be unplayable."
      },
      {
        "stage": 34.5,
        "statement": "Near this height, two of the three ball fields at Kades Playground will be unplayable."
      },
      {
        "stage": 34.4,
        "statement": "Near this height, the Barge Unloading Building of the Doe Run Company begins flooding."
      },
      {
        "stage": 30.8,
        "statement": "Near this height, the biggest of the three ball fields at Kades Playground and the All Bark Village dog park begin flooding."
      },
      {
        "stage": 29.4,
        "statement": "Near this height, the Flux Building of the Doe Run Company begins flooding."
      },
      {
        "stage": 28.3,
        "statement": "Near this height, the walking trail (extension of Station Road) at Bates Memorial Park begins flooding."
      },
      {
        "stage": 22.8,
        "statement": "Near this height, the bottom of the utility gravel road (Station Road) begins flooding."
      }
    ]
  },
  "images": {
    "probability": {
      "weekint": {
        "stage": "https://water.noaa.gov/resources/probabilistic/exceedance/HRCM7.SSTG.prob.weekint.gif",
        "flow": "",
        "volume": ""
      },
      "entperiod": {
        "stage": "https://water.noaa.gov/resources/probabilistic/exceedance/HRCM7.SSTG.exceed.90day.gif",
        "flow": "",
        "volume": ""
      },
      "shortrange": ""
    },
    "hydrograph": {
      "default": "https://water.noaa.gov/resources/hydrographs/hrcm7_hg.png",
      "floodcat": "https://water.noaa.gov/resources/hydrographs/hrcm7_record.png"
    },
    "photos": [
      {
        "id": "11879514485275955694",
        "type": "Feature",
        "geometry": {
          "type": "Point",
          "coordinates": [
            38.26606111,
            -90.37305556
          ]
        },
        "properties": {
          "image": "https://water.noaa.gov/resources/photos/hrcm7/11879514485275955694.jpeg",
          "caption": "Gaging shelter at the Herculaneum riverfront near the Doe Run plant on June 16, 2021."
        }
      },
      {
        "id": "11987283362285556206",
        "type": "Feature",
        "geometry": {
          "type": "Point",
          "coordinates": [
            38.26606111,
            -90.37305556
          ]
        },
        "properties": {
          "image": "https://water.noaa.gov/resources/photos/hrcm7/11987283362285556206.jpeg",
          "caption": "Radar sensor at the Herculaneum riverfront near the Doe Run plant on June 16, 2021."
        }
      },
      {
        "id": "12370330733543887342",
        "type": "Feature",
        "geometry": {
          "type": "Point",
          "coordinates": [
            38.26606111,
            -90.37305556
          ]
        },
        "properties": {
          "image": "https://water.noaa.gov/resources/photos/hrcm7/12370330733543887342.jpeg",
          "caption": "The Herculaneum riverfront from just north of the Doe Run plant on August 26, 2022."
        }
      },
      {
        "id": "12532591939402011118",
        "type": "Feature",
        "geometry": {
          "type": "Point",
          "coordinates": [
            38.26606111,
            -90.37305556
          ]
        },
        "properties": {
          "image": "https://water.noaa.gov/resources/photos/hrcm7/12532591939402011118.jpeg",
          "caption": "Bates Memorial Park flooding on June 29, 2021"
        }
      },
      {
        "id": "12557440597247070702",
        "type": "Feature",
        "geometry": {
          "type": "Point",
          "coordinates": [
            38.26606111,
            -90.37305556
          ]
        },
        "properties": {
          "image": "https://water.noaa.gov/resources/photos/hrcm7/12557440597247070702.jpeg",
          "caption": "Herculaneum Fairgrounds and Park flooding on May 8, 2019, courtesy Wade Smith Photography"
        }
      },
      {
        "id": "12611404645118185966",
        "type": "Feature",
        "geometry": {
          "type": "Point",
          "coordinates": [
            38.26606111,
            -90.37305556
          ]
        },
        "properties": {
          "image": "https://water.noaa.gov/resources/photos/hrcm7/12611404645118185966.jpeg",
          "caption": "Flooding at a utility road near Bates Park on June 29, 2021"
        }
      }
    ]
  },
  "dataAttribution": [
    {
      "abbrev": "US Geological Survey",
      "text": "USGS--Water Resources of the United States",
      "title": "US Geological Survey",
      "url": "https://www.usgs.gov/mission-areas/water-resources"
    },
    {
      "abbrev": "U.S. Army Corps of Engineers",
      "text": "St. Louis District Observations",
      "title": "Observations courtesy of U.S. Army Corps of Engineers",
      "url": "https://www.mvs-wc.usace.army.mil/trans/mi/mihe_s.html"
    }
  ],
  "impactsLowWaters": [],
  "normalThreshold": null,
  "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": "0929"
    },
    {
      "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": "0930",
      "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": 368.23
        }
      ]
    },
    "horizontal": {
      "value": []
    },
    "notes": {
      "value": []
    }
  },
  "inundation": {
    "enabled": false,
    "url": "",
    "zeroDatum": null,
    "downloads": null,
    "siteSpecificInfo": "",
    "dataAttribution": []
  },
  "upstreamLid": "EADM7",
  "downstreamLid": "CHSI2",
  "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"
}