Rivers in South Dakota

Big Sioux River at Trent

Moody County, South DakotaNWS TRES2Sioux Falls office

Below flood stage
1486.3ftStage

Observed Mon, Sep 28, 2:15 AM CDT

Flood stage
1495.0 ft
Record crest
1501.4 ft2019

Open the live map with the river flood outlook

Flood stages and impacts

CategoryStage
Major flood1499.0 ft
Moderate flood1496.0 ft
Minor flood1495.0 ft
Action1494.0 ft
  1. 1501.0 ftWater reaches the bottom of the bridge at the gauge site on 240th St.
  2. 1499.0 ftSeveral houses in Trent will be surrounded by water. The bridge on 477th is overtopped.
  3. 1498.0 ftFlood waters reach into the backyards of several houses in Trent. 240th St on the west side of Trent begins to flood as does the lower portions of 477th south of the bridge.
  4. 1496.0 ft478th Avenue and 242nd Street begin to flood.
  5. 1495.0 ftFlooding begins to affect agricultural lands west of Trent along 240th Street. The river access road just east of the bridge on 240th begins to flood.

Crest history

8 crests on NOAA’s list since 2018.

#DateStage
1September 13, 20191501.4 ft
2March 24, 20191500.0 ft
3April 10, 20231498.1 ft
4April 26, 20181498.0 ft
5June 22, 20241497.3 ft
6March 25, 20181495.8 ft
7March 14, 20201495.8 ft
8July 3, 20251493.2 ft

Most recent crests

  • July 3, 2025: 1493.2 ft
  • June 22, 2024: 1497.3 ft
  • April 10, 2023: 1498.1 ft
  • March 14, 2020: 1495.8 ft
  • September 13, 2019: 1501.4 ft
  • March 24, 2019: 1500.0 ft
  • April 26, 2018: 1498.0 ft
  • March 25, 2018: 1495.8 ft

Nearby

Upstream, downstream and the gauges around this one.

What this means

Forecasts by the Missouri Basin River Forecast Center. Forecasts are not available. Only observed stages are available for this point. No forecasts are available for this location Gauge reading may be affected by ice.

Sources

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