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Big Sioux River at Trent

Highest listed crest 1,501.42 ftFlood stage 1,495.0 ft8 crests since 2018

The Big Sioux River at Trent crested at major flood stage 2 times among the 8 crests the National Weather Service lists from 2018 to 2025. The highest, 1,501.42 ft on September 13, 2019, was major flooding, 6.42 feet above flood stage. 13 other gauges on the Big Sioux River crested above flood stage within a week of it, 8 at their own highest listed crest.

The gauge

Highest listed crest
1,501.42 ft
September 13, 2019
Flood stage
1,495.0 ft
Major flooding from 1,499.0 ft
Crests at major
2
42nd of 155 gauges in South Dakota
Most recent flood crest
June 22, 2024
1,497.33 ft, moderate flooding
Location
Moody County
South Dakota
Identifiers
NWS TRES2
No USGS station

Flood stages

The thresholds the National Weather Service uses for this gauge today, and how many listed crests reached each.

Flood categories, Big Sioux River at Trent
Action stage1,494.00—The level at which the NWS or its partners begin to take action
Flood stage (minor)1,495.02Mar 14, 2020Minimal or no property damage, but possibly some public threat
Moderate flood stage1,496.03Jun 22, 2024Some inundation of structures and roads near the stream
Major flood stage1,499.02Sep 13, 2019Extensive inundation of structures and roads

Every listed crest

8 crests from 2018 to 2025. Filled: at or above flood stage. Hover a crest for its date and stage.

Listed crests at the Big Sioux River at Trent, 2018 to 2025 149214941496149815001502ft Flood stage 1,495.0 ftMajor 1,499.0 ft Mar 25, 2018: 1,495.84 ft, minor floodingApr 26, 2018: 1,498.00 ft, moderate floodingMar 24, 2019: 1,500.00 ft, major floodingSep 13, 2019: 1,501.42 ft, major floodingMar 14, 2020: 1,495.79 ft, minor floodingApr 10, 2023: 1,498.12 ft, moderate floodingJun 22, 2024: 1,497.33 ft, moderate floodingJul 3, 2025: 1,493.22 ft, below flood stage Highest, 1,501.42 ft, Sep 13, 2019 20202025

Crests at or above flood stage, by decade

Crests at or above flood stage per decade, Big Sioux River at Trent 2010s: 4 4 2020s: 3 2010s2020s
  1. These are the crests the local National Weather Service office lists for the gauge: the highest on record and recent crests. Lesser floods between them may be missing, so counts by decade are a floor.
  2. Categories use today's flood stages. Levees, dams and channel changes since a crest can make old and new stages not directly comparable.

Highest crests

Highest listed crests, Big Sioux River at Trent
1Sep 13, 20191,501.42+6.42Major—
2Mar 24, 20191,500.00+5.00Major—
3Apr 10, 20231,498.12+3.12Moderate—
4Apr 26, 20181,498.00+3.00Moderate—
5Jun 22, 20241,497.33+2.33Moderate—
6Mar 25, 20181,495.84+0.84Minor—
7Mar 14, 20201,495.79+0.79Minor—
8Jul 3, 20251,493.22−1.78Below flood stage—

The worst floods along the Big Sioux River

For this gauge's highest crests, the other gauges on the Big Sioux River that crested above flood stage within a week.

September 13, 2019: 1,501.42 ft here, major flooding

  • FlandreauSD · Sep 13, 2019 · 1,545.29 ft · Major · its highest
  • EganSD · Sep 12, 2019 · 1,524.20 ft · Major · its highest
  • Dell RapidsSD · Sep 13, 2019 · 1,490.00 ft · Major · its highest
  • BrandonSD · Sep 14, 2019 · 1,313.53 ft · Major · its highest
  • CantonSD · Sep 13, 2019 · 1,245.88 ft · Major
  • RichlandIA · Sep 17, 2019 · 1,123.51 ft · Major
  • HawardenSD · Sep 15, 2019 · 32.42 ft · Major
  • Sioux Falls I-90SD · Sep 14, 2019 · 18.91 ft · Major · its highest
  • Dell RapidsSD · Sep 13, 2019 · 16.70 ft · Major · its highest
  • FairviewSD · Sep 14, 2019 · 1,213.14 ft · Moderate · its highest

March 24, 2019: 1,500.00 ft here, major flooding

April 10, 2023: 1,498.12 ft here, moderate flooding

Gauges on the Big Sioux River

Flood gauges sharing the river's name, linked within 80 miles of one another.

Flood gauges on the Big Sioux River
CantonSD1,235.01,248.35 ft, Jun 22, 20243
Dell RapidsSD1,481.01,490.00 ft, Sep 13, 20192
FlandreauSD1,540.01,545.29 ft, Sep 13, 20191
HawardenSD20.539.92 ft, Jun 22, 20244
AkronIA16.027.35 ft, Jun 22, 202424
FairviewSD1,202.01,213.14 ft, Sep 14, 20190
Lake KampeskaSD21.022.40 ft, Mar 15, 20100
Lake Poinsett Inlet/OutletSD1,654.01,657.60 ft, Apr 5, 20112
Sioux CitySD32.044.90 ft, Jun 23, 20241
Sioux Falls I-90SD12.018.91 ft, Sep 14, 20191
Sioux Falls N. Cliff AvenueSD16.026.08 ft, Sep 14, 20190
Sioux Falls Western AvenueSD8.016.90 ft, Mar 14, 20194
Trent this gaugeSD1,495.01,501.42 ft, Sep 13, 20192
Watertown Broadway AvenueSD10.513.67 ft, Apr 6, 19971
Watertown Sioux Conifer RoadSD9.011.18 ft, Apr 13, 20230
WatertownSD11.013.13 ft, Apr 2, 19975
BrandonSD1,304.01,313.53 ft, Sep 14, 20192
BrookingsSD9.014.77 ft, Apr 9, 19690
BruceSD8.012.16 ft, Mar 28, 20110
CastlewoodSD9.013.19 ft, Apr 7, 19970
Dell RapidsSD12.016.70 ft, Sep 13, 201910
EganSD1,516.51,524.20 ft, Sep 12, 20192
EstellineSD1,644.01,647.03 ft, Jun 30, 20250
FlorenceSD8.09.70 ft, Apr 13, 20236
JeffersonIA31.044.50 ft, Jun 24, 20242
RichlandIA1,117.01,128.70 ft, Jun 23, 20245
WatertownSD10.012.33 ft, Apr 7, 20012

Other gauges in Moody County

Flood gauges in Moody County
Flandreau1,540.01,545.29 ft, Sep 13, 20191
Brookings9.014.77 ft, Apr 9, 19690
Egan1,516.51,524.20 ft, Sep 12, 20192
Flandreau9.014.00 ft, Sep 12, 20190
Chester7.07.45 ft, Jul 10, 20110

Moody County: every hazard · River floods across the country · South Dakota

NOAA National Water Prediction Service, gauge TRES2, retrieved October 30, 2026. Stages in feet on the gauge's own datum, not elevation. Crests are as the National Weather Service lists them; preliminary values may be revised.