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DESCRIPTION:

Latitude 43°00'47",   Longitude 102°50'07"   NAD27

Oglala Lakota County, South Dakota, Hydrologic Unit 10140201

Drainage area: 1,367 square miles

Contributing drainage area: 1,367 square miles,

Datum of gage: 3,024.67 feet above   NAVD88.

AVAILABLE DATA:

Data Type	Begin Date	End Date	Count
Current / Historical Observations     (availability statement)	1990-10-02	2025-09-04
Daily Data
Discharge, cubic feet per second	1987-10-01	2025-09-03	13853
Gage height, feet	2018-05-01	2025-09-03	2573
Daily Statistics
Discharge, cubic feet per second	1987-10-01	2025-04-09	13706
Gage height, feet	2018-05-01	2025-04-09	2426
Monthly Statistics
Discharge, cubic feet per second	1987-10	2025-04
Gage height, feet	2018-05	2025-04
Annual Statistics
Discharge, cubic feet per second	1988	2025
Gage height, feet	2018	2025
Peak streamflow	1988-05-20	2024-04-08	37
Field measurements	1987-08-27	2025-08-06	311
Field/Lab water-quality samples (Legacy QW is frozen as of March 2024, newer data may be found on MLP)	1987-10-01	2015-08-20	226
Water-Year Summary	2006	2024	19
Revisions	Loading...

OPERATION:

Record for this site is maintained by the USGS South Dakota Water Science Center

Email questions about this site to South Dakota Water Science Center Water-Data Inquiries

ADDITIONAL INFORMATION

National Weather Service Floodstage 16.0 ft.