USGS Surface Water for USA: Streamflow Measurements

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Explore the NEW USGS National Water Dashboard interactive map to access real-time water data from over 13,500 stations nationwide.

Streamflow Measurements for the Nation

12391000 Clark Fork at Thompson Falls MT

Sanders County, Montana

Hydrologic Unit Code 17010213

Latitude 47°35'44.03", Longitude 115°22'09.52" NAD83

Drainage area 21,129 square miles

Gage datum 2,340 feet above NGVD29

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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: Montana Water Data Support Team
Page Last Modified: 2025-11-17 16:57:30 EST
1.32 1.22 vaww02