USGS Surface Water for USA: Streamflow Measurements

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Streamflow Measurements for the Nation

Pennington County, South Dakota

Hydrologic Unit Code 10120107

Latitude 44°04'02", Longitude 104°01'26" NAD27

Land-surface elevation 6,340 feet above NGVD29

Spring discharges from the Paleozoic aquifers (N500PLOZOC) national aquifer.

Spring discharges from the Pahasapa Limestone (337PHSP) local aquifer.

**Period of record**
Begin Date	End Date	Count
1995-08-14	1995-08-14	1

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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: 2025-09-12 10:24:26 EDT
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