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FloodSmart
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Hydrograph River at a Glance Download
Big Sioux River at Flandreau Stage (ft)FLAS2(plotting HGIRZ) Graph Created (10:19AM Dec 14, 2019)Flood Stage is 11 ft
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Tabular Data (CST)
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Datum: Not Available
Metadata
NOTE: 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.

NOTE: 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.

NOTE: Forecasts are not available for the Big Sioux River at Flandreau. Only observed stages are available for this point.

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Upstream Gauge - above Flandreau Upstream Gauge Downstream Gauge Downstream Gauge - near Dell Rapids
Flood Categories (in feet)
Major Flood Stage: 15
Moderate Flood Stage: 12
Flood Stage: 11
Action Stage: 9
Low Stage (in feet): -9999

Historic Crests
(1) 17.80 ft on 04/09/1969
(2) 15.30 ft on 09/12/2019
(3) 15.00 ft on 06/22/1984
(4) 14.20 ft on 06/17/1957
(5) 14.00 ft on 07/04/1993
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 15.30 ft on 09/12/2019
(2) 13.90 ft on 03/23/2011 (P)
(3) 12.20 ft on 03/17/2010
(4) 12.60 ft on 04/23/2001
(5) 13.60 ft on 04/03/1997
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.

For more information on your flood risk go to www.floodsmart.gov.
Zoom Level:14
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Gauge LocationGauge Map Marker
 Disclaimer
Latitude/Longitude Disclaimer: The gauge location shown in the above map is the approximate location based on the latitude/longitude coordinates provided to the NWS by the gauge owner.
Flood Impacts & Photos Collapse
If you notice any errors in the below information, please contact our Webmaster
15 There is significant flooding at the Flandreau Indian School and the water pumping plant begins to flood.
13.5 About 20 homes in Trent are surrounded by water, and the Flandreau Creek Country Club golf course is flooded.
13 240th Street west of Trent is flooded and water threatens some homes in Trent.
12 The Road leading to the Flandreau Indian School begins to flood, and there is significant flooding in the Flandreau city park.
11 The Flandreau city park begins to flood.
Photos
(1) Upstream View
(2) Downstream View
About This Location Collapse

Latitude: 44.053611° N, Longitude: 96.593611° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft 11 ft Interpreting hydrographs and NWS watch, warnings, and forecasts, and inundation maps
Vertical Datum Elevation
(gauge height = 0)		 Elevation
(gauge height = flood stage)		 Elevation information source
NAVD88 Not Available Not Available Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps
NGVD 29 Not Available Not Available Older USGS topographic maps, NGVD29 benchmarks
MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks
Other 1519.2 ft 1530.2 ft  
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Hydrologic Resources Additional Resources
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The National Weather Service prepares its forecasts and other services in collaboration with agencies like the US Geological Survey, US Bureau of Reclamation, US Army Corps of Engineers, Natural Resource Conservation Service, National Park Service, ALERT Users Group, Bureau of Indian Affairs, and many state and local emergency managers across the country. For details, please click here.
NWS Information
National Weather Service
Sioux Falls Weather Forecast Office
26 Weather Lane
Sioux Falls, SD 57104-0198
(605) 330-4247
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