Rivers in Missouri

Mississippi River at Herculaneum

Jefferson County, MissouriNWS HRCM7St. Charles office

Below flood stage
13.11ftStage

Observed Tue, Sep 29, 4:00 AM CDT

Flood stage
26.00 ft
Record crest
29.79 ft2024

Open the live map with the river flood outlook

Flood stages and impacts

CategoryStage
Major flood37.00 ft
Moderate flood32.00 ft
Minor flood26.00 ft
Action24.00 ft
  1. 47.00 ftNear this height, the Herculaneum wastewater pumping station on Station Street begins flooding.
  2. 46.00 ftNear this height, the New South bridge will begin flooding on the bridge deck at the south end of the bridge.
  3. 44.50 ftNear this height, the New South bridge will begin flooding at the south approach to the bridge.
  4. 38.60 ftAt this height, the railroad tracks at the Herculaneum riverfront will be inundated.
  5. 36.50 ftAt this height, the ground adjacent to the office trailer at the Doe Run barge unloader will be inundated.
  6. 35.80 ftNear this height, all 3 of the ball fields at Kades Playground will be unplayable.
  7. 34.50 ftNear this height, two of the three ball fields at Kades Playground will be unplayable.
  8. 34.40 ftNear this height, the Barge Unloading Building of the Doe Run Company begins flooding.
  9. 30.80 ftNear this height, the biggest of the three ball fields at Kades Playground and the All Bark Village dog park begin flooding.
  10. 29.40 ftNear this height, the Flux Building of the Doe Run Company begins flooding.
  11. 28.30 ftNear this height, the walking trail (extension of Station Road) at Bates Memorial Park begins flooding.
  12. 22.80 ftNear this height, the bottom of the utility gravel road (Station Road) begins flooding.

Flood outlook

Chance of flooding, October to December

CategoryChance
Minor flooding18%
Moderate flooding6%
Major floodingUnder 5%

The three-month chances are the River Forecast Centers’ long-range flood outlook, issued September 25, 2026.

Crest history

8 crests on NOAA’s list since 2021.

#DateStage
1July 10, 202429.79 ft
2March 21, 202129.31 ft
3May 8, 202227.90 ft
4June 29, 202127.41 ft
5May 1, 202627.12 ft
6May 2, 202427.10 ft
7May 11, 202426.39 ft
8July 17, 202426.02 ft

Most recent crests

  • May 1, 2026: 27.12 ft
  • July 17, 2024: 26.02 ft
  • July 10, 2024: 29.79 ft
  • May 11, 2024: 26.39 ft
  • May 2, 2024: 27.10 ft
  • May 8, 2022: 27.90 ft
  • June 29, 2021: 27.41 ft
  • March 21, 2021: 29.31 ft

Nearby

Upstream, downstream and the gauges around this one.

What this means

Forecasts by the North Central River Forecast Center. Forecasts are issued as needed during times of high water, but are not routinely available. 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. 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.

Sources

Stage, flood stages, impacts and crest history from NOAA’s National Water Prediction Service.