USGS Surface Water for USA: Streamflow Measurements

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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.

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Mendocino County, California

Hydrologic Unit Code 18010104

Latitude 39°49'15", Longitude 123°04'50" NAD27

Drainage area 162 square miles

Gage datum 1,456.71 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: California Water Data Support Team
Page Last Modified: 2025-12-10 07:30:03 EST
0.63 0.48 caww01

11472900 BLACK BUTTE R NR COVELO CA