Yakima River Above Ahtanum Creek at Union Gap, WA - 12500450

USGS Topo Imagery

Hydro

Legend

Monitoring Location

Active Monitoring Locations

5 km

3 mi

Leaflet

Interested in understanding how to access the upstream/downstream data? Learn about the Network-Linked Data Index (NLDI)

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	2025-03-23
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	2025-03-23
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	2025-02-05
_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	Lower Yakima	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