Available data

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

10 data types available - data from 1986-10-01 to 2026-08-05

11 data types available - data from 1939-10-01 to 2026-08-05

10 data types available - data from 1919-01-23 to 2026-07-02

114 Observed properties (data types) available - with data from 1981-10-28 to 2023-08-09

1013 Sampling activities

2 data types available - with data from 1940-02-06 to 2024-12-28

8 data types available - data from 1939-10-01 to 2026-08-04

Zoom out to see link to My Favorites

Operated in cooperation with:

Metadata Element	Location Metadata	Metadata Code
Agency	U.S. Geological Survey	USGS
Location identification number	14203500	n/a
Location name	TUALATIN RIVER NEAR DILLEY, OR	n/a
Site type	Stream	ST
Decimal latitude (WGS84)	45.4748365069704	n/a
Decimal longitude (WGS84)	-123.124273987822	n/a
Latitude-longitude method	Interpolated from map	M
Latitude-longitude accuracy	Unknown or unspecified.	U
District	Oregon	41
State	Oregon	41
County	Washington County	067
Country	United States of America	n/a
Altitude of gage/land surface	147.57 feet	n/a
Method altitude determined	Level or other surveyed method.	L
Altitude accuracy	0.1 feet	n/a
Altitude datum	National Geodetic Vertical Datum of 1929	NGVD29
Subbasin hydrologic unit	Tualatin	17090010
Drainage basin		n/a
Date of first construction		n/a
Drainage area	125 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