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Available data

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Continuous data

3 data types available - data from 1986-10-01 to 2026-08-22

Daily data

2 data types available - data from 1920-11-13 to 2026-08-21

Field measurements

3 data types available - data from 1972-11-29 to 2026-07-07

Discrete sample data

232 Observed properties (data types) available - with data from 1991-11-05 to 2024-11-27

40 Sampling activities

Peak measurements

2 data types available - with data from 1920-12-12 to 2025-01-03

Statistical tables for select daily data types

2 data types available - data from 1920-11-13 to 2026-08-21

Important information about this monitoring location

The elevation of this station has been determined to be 273.66 feet above NAVD 1988. To obtain stream water-surface elevation values in NAVD 1988 add 273.66 feet to gage height values.

Location details and information

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Operated in cooperation with:

US Army Corps of Engineers - Portland District

Metadata Element	Location Metadata	Metadata Code
Agency	U.S. Geological Survey	USGS
Location identification number	14170000	n/a
Location name	LONG TOM RIVER AT MONROE, OR	n/a
Site type	Stream	ST
Decimal latitude (WGS84)	44.31283333333333	n/a
Decimal longitude (WGS84)	-123.29636111111111	n/a
Latitude-longitude method	Interpolated from digital map	N
Latitude-longitude accuracy	Accurate to + or - 1 sec.	S
District	Oregon	41
State	Oregon	41
County	Benton County	003
Country	United States of America	n/a
Altitude of gage/land surface	273.66 feet	n/a
Method altitude determined	GNSS2 - Level 2 Quality Survey Grade Global Navigation Satellite System	X
Altitude accuracy	0.14 feet	n/a
Altitude datum	North American Vertical Datum of 1988	NAVD88
Subbasin hydrologic unit	Upper Willamette	17090003
Drainage basin		n/a
Date of first construction		n/a
Drainage area	391 square miles	n/a
Contributing drainage area		n/a
Time zone abbreviation	PST	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 Long Tom River at Monroe, OR - USGS-14170000