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Streamflow Measurements for the Nation

! Streamflow measurement pages will be decommissioned in early 2026. Please find the modernized pages in WDFN that suit you best. Learn more about our modernization plans and timeline and new pages.

USGS 11493500 WILLIAMSON RIVER NEAR KLAMATH AGENCY, OR

Klamath County, Oregon
Hydrologic Unit Code 18010201
Latitude  42°44'23.73", Longitude 121°50'04.26" NAD83
Drainage area 1,290  square miles
Gage datum 4,487.42 feet above NAVD88

Period of record
Begin Date End Date Count
1970-10-12 2025-11-17 295

 
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