USGS Surface Water for USA: Streamflow Measurements

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Streamflow Measurements for the Nation

Available data for this site

Merrimack County, New Hampshire

Hydrologic Unit Code 01070003

Latitude 43°11'34", Longitude 71°44'52" NAD27

Drainage area 427 square miles

Gage datum 355.15 feet above NAVD88

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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: New Hampshire Water Data Support Team
Page Last Modified: 2025-10-31 10:34:35 EDT
1.56 1.44 sdww02

01085500 CONTOOCOOK R BL HOPKINTON DAM AT W HOPKINTON, NH