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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 Legacy real-time page

USGS Parameter Group Data Types Start Date End Date
Biological Water-quality 1979-05-16 2004-07-26
Information Water-quality 1979-04-26 2004-07-26
Inorganics, Major, Metals Water-quality 1979-04-26 1999-08-03
Inorganics, Major, Non-metals Unit Values, Water-quality 1979-04-26 2023-10-31
Inorganics, Minor, Non-metals Water-quality 1979-04-26 1999-08-03
Inorganics, Minor, metals Water-quality 1979-04-26 1999-08-03
Microbiological Water-quality 1979-04-26 1993-09-15
Nutrient Unit Values, Water-quality 1979-04-26 2024-11-21
Organics, PCBs Water-quality 1987-09-16 1999-08-03
Organics, other Water-quality 1979-04-26 1999-08-03
Organics, pesticide Water-quality 1983-05-18 1999-08-03
Physical Daily Values, Unit Values, Water-quality 1966-10-01 2024-11-21
Population/Community Water-quality 1979-05-16 1981-09-15
Radiochemistry Water-quality 1980-10-22 1999-08-03
Sediment Water-quality 1975-03-14 1999-08-03
Stable Isotopes Water-quality 1986-08-15 1990-03-15
n/a Peak Measurements 1967-06-22 2023-05-05
n/a Site Visits 1967-10-06 2024-08-13
n/a USGS Annual Water Data Reports Site 2006-01-01 2024-01-01
Water Data for the Nation inventory

Monitoring location 12500450 is associated with a Stream in Yakima County, Washington. Current conditions of Discharge, Gage height, and Nitrate plus nitrite are available. Water data back to 1966 are available online.

The datum of the gage has been determined to be 903.42 ft above NAVD 1988. To obtain stream water-surface elevation values in NAVD 1988, add 903.42 ft to gage height values.
Metadata Element Location Metadata Metadata Code
Agency
U.S. Geological Survey USGS
Site identification number
12500450 n/a
Site name
YAKIMA RIVER ABOVE AHTANUM CREEK AT UNION GAP, WA n/a
Site type
Stream
ST
DMS latitude 463204 n/a
DMS longitude 1202758 n/a
Decimal latitude 46.53425817 n/a
Decimal longitude -120.4672519 n/a
Latitude-longitude method
Interpolated from MAP. M
Latitude-longitude accuracy
Accurate to + or - 1 sec. S
Latitude-longitude datum
North American Datum of 1927 NAD27
Decimal Latitude-longitude datum North American Datum of 1983 NAD83
District
Washington 53
State
Washington 53
County
Yakima County 077
Country US n/a
Land net location description NWNES17 T12N R19E W n/a
Name of location map YAKIMA EAST n/a
Scale of location map 24000 n/a
Altitude of Gage/land surface 903.42 feet n/a
Method altitude determined GNSS2 - Level 2 Quality Survey Grade Global Navigation Satellite System X
Altitude accuracy .21 feet n/a
Altitude datum
North American Vertical Datum of 1988 NAVD88
Subbasin hydrologic unit
17030003
Drainage basin
n/a
Topographic setting
n/a
Flags for instruments at site NNNNYNNNNNNNNNNNNNNNNNNNNNNNNN n/a
Date of first construction
n/a
Date site established or inventoried n/a
Drainage area
3479 square miles n/a
Contributing drainage area n/a
Time Zone abbreviation PST n/a
Site honors Daylight Saving Time
Y n/a
Data reliability
n/a
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

Operated in cooperation with:

logo for USGS - Federal Priority Streamgages
USGS - Federal Priority Streamgages
logo for Washington State Department of Ecology
Washington State Department of Ecology