<a href="https://www.usgs.gov/centers/alaska-science-center/science/usgs-alaska-streamgage-datum-north-american-vertical-datum">USGS Alaska Streamgage Datum to North American Vertical Datum of 1988 Conversion Table</a>

Discontinued October 1, 2025 at cooperators request.

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Continuous data

2 data types available - data from 2004-06-22 to 2025-11-22

Daily data

1 data types available - data from 2004-03-23 to 2025-11-20

Field measurements

3 data types available - data from 2004-03-23 to 2025-09-04

Discrete sample data

21 Observed properties (data types) available - with data from 2004-09-26 to 2025-07-30

34 Sampling activities

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1 data types available - data from 2004-03-23 to 2025-11-20

Location details and information

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Alaska Department of Natural Resources - Mining, Land and Water Division

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Metadata Element	Location Metadata	Metadata Code
Agency	U.S. Geological Survey	USGS
Location identification number	15515060	n/a
Location name	MARGUERITE C AB EMMA C NR HEALY AK	n/a
Site type	Stream	ST
Decimal latitude (WGS84)	64.00841079989813	n/a
Decimal longitude (WGS84)	-148.72824515510172	n/a
Latitude-longitude method	Mapping grade GPS unit (handheld accuracy range 12 to 40 ft)	G
Latitude-longitude accuracy	Accurate to + or - 1 sec.	S
District	Alaska	02
State	Alaska	02
County	Denali Borough	068
Country	United States of America	n/a
Altitude of gage/land surface	1906.7 feet	n/a
Method altitude determined	GNSS2 - Level 2 Quality Survey Grade Global Navigation Satellite System	X
Altitude accuracy	0.1 feet	n/a
Altitude datum	North American Vertical Datum of 1988	NAVD88
Subbasin hydrologic unit	Tanana Flats-Tanana River	19080307
Drainage basin		n/a
Date of first construction		n/a
Drainage area	15.6 square miles	n/a
Contributing drainage area		n/a
Time zone abbreviation	AKST	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 Marguerite C AB Emma C NR Healy AK - USGS-15515060