Waterlands
Big Sioux River
USGS · 06479525
BIG SIOUX RIVER
USGS · 06479525LIVE

Big Sioux River near Castlewood, SD

HAMLIN COUNTY, SD44.7316°N, -97.0443°W Updated 14 min ago
FLOW RATE
22.5cfs
GAUGE HT
4.77ft
Flow Rate Historical Avg
MEDIAN FLOW RATE · 1 DAY
22.5cfs 83.1% vs avg
Optimal band: 16–22 cfs
PERIOD HIGH
22.5cfs
PERIOD LOW
17.5cfs
RUNNABLE
91%
last 1 day in band

Gauge Height

4.77ft
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Station Location

44.7316, -97.0443
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DATA · USGS · NOAA · NWSUPDATED 2026-10-16 17:45 UTC
Site #06479525·USGS

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