USGS Surface Water for USA: Streamflow Measurements

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Streamflow Measurements for the Nation

Pennington County, South Dakota

Hydrologic Unit Code 10120110

Latitude 43°59'20", Longitude 102°59'40" NAD27

Drainage area 508 square miles

Contributing drainage area 508 square miles

Gage datum 2,900.00 feet above NGVD29

**Period of record**
Begin Date	End Date	Count
1999-06-23	2000-08-31	15

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U.S. Department of the Interior | U.S. Geological Survey
Title: Surface Water for USA: Streamflow Measurements
URL: https://waterdata.usgs.gov/nwis/measurements?

Page Contact Information: South Dakota Water Data Support Team
Page Last Modified: 2025-11-16 20:52:35 EST
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