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Available data

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Continuous data

10 data types available - data from 2000-10-01 to 2026-07-29

Daily data

1 data types available - data from 2000-09-30 to 2026-07-27

Field measurements

2 data types available - data from 1992-04-07 to 2026-06-15

Discrete sample data

324 Observed properties (data types) available - with data from 1962-05-15 to 2026-07-21

316 Sampling activities

Statistical tables for select daily data types

1 data types available - data from 2000-09-30 to 2026-07-27

Important information about this monitoring location

The elevation of this gage is 330.99 ft above NAVD of 1988. To obtain stream water surface elevation values in NAVD88, add 330.99 feet to gage height values.

Location details and information

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Operated in cooperation with:

Connecticut Department of Energy and Environmental Protection

USGS - Cooperative Matching Funds

Metadata Element	Location Metadata	Metadata Code
Agency	U.S. Geological Survey	USGS
Location identification number	01125100	n/a
Location name	FRENCH RIVER AT NORTH GROSVENORDALE, CT	n/a
Site type	Stream	ST
Decimal latitude (WGS84)	41.97846388888889	n/a
Decimal longitude (WGS84)	-71.9005138888889	n/a
Latitude-longitude method	Interpolated from digital map	N
Latitude-longitude accuracy	Accurate to + or - .01 sec (Differentially-Corrected GPS).	H
District	Connecticut	09
State	Connecticut	09
County	Northeastern Connecticut Planning Region	150
Country	United States of America	n/a
Altitude of gage/land surface	330.99 feet	n/a
Method altitude determined	GNSS2 - Level 2 Quality Survey Grade Global Navigation Satellite System	X
Altitude accuracy	0.16 feet	n/a
Altitude datum	North American Vertical Datum of 1988	NAVD88
Subbasin hydrologic unit	Quinebaug River	01100001
Drainage basin		n/a
Date of first construction		n/a
Drainage area	101 square miles	n/a
Contributing drainage area		n/a
Time zone abbreviation	EST	n/a
Site honors Daylight Saving Time	Y	n/a
National aquifer		n/a
Local aquifer		n/a
Local aquifer type		n/a
Well depth		n/a
Hole depth		n/a
Source of depth data		n/a

Monitoring location French River at North Grosvenordale, CT - USGS-01125100