Important Legacy real-time page

Available data

Select data types to graph from categories based on the way the data were collected.

Learn about the data collection categories

Continuous data

3 data types available - data from 1986-10-01 to 2026-08-02

Daily data

2 data types available - data from 1920-11-13 to 2026-08-01

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 2024-06-10

38 Sampling activities

Statistical tables for select daily data types

2 data types available - data from 1920-11-13 to 2026-08-01

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

Zoom out to see link to My Favorites

Use Explore USGS Water Data to discover additional data near this location

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