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Important for you to know:

  • New to WDFN: see current water conditions throughout the state using the new State Pages. Filter by continuous data type and age of data, view latest values, and link to graphing options to explore the data further. To learn more, read our announcement on the Water Data for the Nation blog.
Important Inventory Page

USGS Parameter Group Data Types Start Date End Date
Information Water-quality 1975-07-15 1980-10-23
Inorganics, Major, Metals Water-quality 1975-07-15 1980-10-23
Inorganics, Major, Non-metals Water-quality 1975-07-15 1980-10-23
Inorganics, Minor, Non-metals Water-quality 1980-07-24 1980-10-23
Inorganics, Minor, metals Water-quality 1980-07-24 1980-10-23
Nutrient Water-quality 1980-07-24 1980-10-23
Organics, other Water-quality 1980-07-24 1980-10-23
Physical Water-quality 1975-07-15 1980-10-23
Water Data for the Nation inventory

Monitoring location 451604121442600 is associated with a Lake, Reservoir, Impoundment in Clackamas County, Oregon. Water data back to 1975 are available online.

Metadata Element Location Metadata Metadata Code
Agency
U.S. Geological Survey USGS
Site identification number
451604121442600 n/a
Site name
TRILLIUM LAKE (CLACKAMAS COUNTY) OREG. n/a
Site type
Lake, Reservoir, Impoundment
LK
DMS latitude 451604 n/a
DMS longitude 1214426 n/a
Decimal latitude 45.26761837 n/a
Decimal longitude -121.7417442 n/a
Latitude-longitude method
Interpolated from MAP. M
Latitude-longitude accuracy
Unknown or unspecified. U
Latitude-longitude datum
North American Datum of 1927 NAD27
Decimal Latitude-longitude datum North American Datum of 1983 NAD83
District
Oregon 41
State
Oregon 41
County
Clackamas County 005
Country US n/a
Land net location description n/a
Name of location map n/a
Scale of location map n/a
Altitude of Gage/land surface n/a
Method altitude determined n/a
Altitude accuracy n/a
Altitude datum
n/a
Subbasin hydrologic unit
17080001
Drainage basin
n/a
Topographic setting
n/a
Flags for instruments at site NNNNNNNNNNNNNNNNNNNNNNNNNNNNNN n/a
Date of first construction
n/a
Date site established or inventoried n/a
Drainage area
n/a
Contributing drainage area n/a
Time Zone abbreviation PST n/a
Site honors Daylight Saving Time
Y n/a
Data reliability
Data have been checked by the reporting agency. C
Data-other GW files NNNNNNNN 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
Project number n/a