<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>

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Available data

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Continuous data

8 data types available - data from 2011-07-14 to 2026-08-02

Daily data

4 data types available - data from 2011-07-01 to 2026-07-31

Field measurements

3 data types available - data from 2011-07-14 to 2026-07-02

Discrete sample data

135 Observed properties (data types) available - with data from 2019-05-22 to 2025-06-10

34 Sampling activities

Statistical tables for select daily data types

3 data types available - data from 2011-07-01 to 2026-07-31

Important information about this monitoring location

Datum of gage is 33.9 ft above NAVD of 1988. The NAVD of 1988 was determined by a level 3 GNSS static survey(Reference Frame NAD_83(2011)(EPOCH:2010.0000),
GEOID12B) by USGS on April 23, 2024. Prior to August 2024 arbitrary datum, elevation of gage was 30 ft NGVD of 1929 as determined via topographic map.

Location details and information

Available location images

Alsek River at Dry Bay near Yakutat

Alsek River at Dry Bay near Yakutat, AK Monitoring location 15129120 is associated with a STREAM in CITY AND BOROUGH OF YAKUTAT, ALASKA. Current conditions of DISCHARGE, DISSOLVED OXYGEN, GAGE HEIGHT, and MORE are available. Water data back to 2011 are available online. This camera is telemetered by satellite and updates at approximately 17:00 UTC (+/- 60 minutes) each day.

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USGS - Federal Priority Streamgages

Metadata Element	Location Metadata	Metadata Code
Agency	U.S. Geological Survey	USGS
Location identification number	15129120	n/a
Location name	ALSEK R AT DRY BAY NR YAKUTAT AK	n/a
Site type	Stream	ST
Decimal latitude (WGS84)	59.192806	n/a
Decimal longitude (WGS84)	-138.333917	n/a
Latitude-longitude method	Interpolated from digital map	N
Latitude-longitude accuracy	Accurate to + or - 1 sec.	S
District	Alaska	02
State	Alaska	02
County	Yakutat City and Borough	282
Country	United States of America	n/a
Altitude of gage/land surface	33.9 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	Alsek River	19010404
Drainage basin		n/a
Date of first construction		n/a
Drainage area	11417 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 Alsek R at Dry Bay NR Yakutat AK - USGS-15129120