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Scheduled Maintenance Notice
USGS will be performing maintenance on the time series data processing system beginning at 09:00 EDT on September 10, 2026. During this period, delivery of the latest time series data will be delayed. The maintenance is expected to finish within 2 hours, after which all backlogged time series data will be processed and delivered to WDFN web portals and APIs.

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Available data

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Continuous data

1 data types available - data from 2007-10-01 to 2026-09-09

Daily data

2 data types available - data from 1974-04-10 to 2026-09-08

Field measurements

3 data types available - data from 1990-11-15 to 2026-06-25

Discrete sample data

27 Observed properties (data types) available - with data from 1975-06-25 to 1983-11-16

15 Sampling activities

Statistical tables for select daily data types

2 data types available - data from 2000-10-01 to 2026-09-08

Important information about this monitoring location

The datum of the gage has been determined to be 0.00 feet above NGVD 1929. To obtain reservoir water-surface elevations in NAVD 1988 subtract 0.05 feet from NGVD 1929 values.

Location details and information

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Luminant Generation Co. LLC

Metadata Element	Location Metadata	Metadata Code
Agency	U.S. Geological Survey	USGS
Location identification number	08022060	n/a
Location name	Martin Lk nr Tatum, TX	n/a
Site type	Lake, Reservoir, Impoundment	LK
Decimal latitude (WGS84)	32.2727877441227	n/a
Decimal longitude (WGS84)	-94.5660544334127	n/a
Latitude-longitude method	Interpolated from map	M
Latitude-longitude accuracy	Accurate to + or - 5 sec.	F
District	Texas	48
State	Texas	48
County	Rusk County	401
Country	United States of America	n/a
Altitude of gage/land surface	0	n/a
Method altitude determined	Reported method of determination.	R
Altitude accuracy	1 feet	n/a
Altitude datum	National Geodetic Vertical Datum of 1929	NGVD29
Subbasin hydrologic unit	Middle Sabine	12010002
Drainage basin		n/a
Date of first construction		n/a
Drainage area	130 square miles	n/a
Contributing drainage area	130 square miles	n/a
Time zone abbreviation	CST	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 Martin Lk nr Tatum, TX - USGS-08022060