USGS Surface Water for USA: Streamflow Measurements

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Explore the NEW USGS National Water Dashboard interactive map to access real-time water data from over 13,500 stations nationwide.

Streamflow Measurements for the Nation

USGS 08173500 San Marcos Rv at Ottine, TX

Gonzales County, Texas

Hydrologic Unit Code 12100203

Latitude 29°35'33.39", Longitude 97°35'17.12" NAD83

Drainage area 1,249 square miles

Contributing drainage area 1,249 square miles

Gage datum 285.20 feet above NGVD29

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Meas. Number	Date Time	Time Datum	Measurement Used?	Who	Measuring Agency	Stream flow (ft³/s)	Gage Height (ft)	GH Change (ft)	Meas. Duration (hr)	Meas. Rated	Control	Flow Adjust. Code
19	2011-09-12 14:20	CDT	Yes	MAW/BLP	USGS	71.1	1.14	0.00	2.00	Fair	Unspecifed	NONE
18	2011-09-12 13:51	CDT	Yes	MAW/BLP	USGS	73.5	1.14	0.00	2.00	Fair	Unspecifed	NONE
17	2011-08-22 12:15	CDT	Yes	MAW/BLP	USGS	77.1	1.17	-0.01	1.00	Fair	Unspecifed	NONE
16	2011-08-22 11:52	CDT	Yes	MAW/BLP	USGS	78.9	1.18	-0.01	1.00	Fair	Unspecifed	NONE
15	2011-08-09 17:40	CDT	Yes	MAW/BLP	USGS	78.8	1.19	-0.03	1.30	Fair	Clear	NONE
14	2011-08-09 17:18	CDT	Yes	MAW/BLP	USGS	80.8	1.18	-0.03	1.30	Fair	Clear	NONE
13	2011-04-14 15:59	CDT	Yes	MAW/ABM	USGS	150	1.51	0.00	0.50	Fair		NONE
12	2011-04-14 12:31	CDT	Yes	MAW/ABM	USGS	148	1.52	0.00	0.30	Fair		NONE
11	2011-04-14 12:16	CDT	Yes	MAW/ABM	USGS	149	1.52	0.00	0.30	Fair		NONE
10	2011-03-23 16:16	CDT	Yes	MAW/ABM	USGS	173	1.62	0.00	0.40	Fair		NONE
9	2011-03-23 15:53	CDT	Yes	MAW/ABM	USGS	176	1.62	0.00	0.40	Fair		NONE
7	2011-01-26 13:47	CST	Yes	MAW/ABM	USGS	229	1.85	-0.01	0.60	Fair		NONE
6	2011-01-26 13:19	CST	Yes	MAW/ABM	USGS	220	1.85	0.00	0.50	Fair		NONE
5	2010-04-05 13:58	CDT	Yes	MAW/ABM	USGS	522	2.89			Unspecified		NONE
4	2010-04-05 13:35	CDT	Yes	MAW/ABM	USGS	529	2.89	0.00	2.00	Poor		NONE
3	2010-03-17 11:07	CDT	Yes	MAW/ABm	USGS	609	3.25	-0.01	0.30	Fair		NONE
2	2010-03-16 12:24	CDT	Yes	MAW/ABM	USGS	640	3.19	0.00	0.30	Fair		NONE
1	2010-01-27 11:14	CST	Yes	MAW/ABM	USGS	663	3.17	0.00	1.60	Fair		NONE

Meas.
Number

Date Time

Time
Datum

Measurement
Used?

Who

Measuring
Agency

Stream
flow
(ft³/s)

Gage
Height
(ft)

GH
Change
(ft)

Meas.
Duration
(hr)

Meas.
Rated

Control

Flow
Adjust.
Code

2011-09-12 14:20

CDT

Yes

MAW/BLP

USGS

71.1

1.14

0.00

2.00

Fair

Unspecifed

NONE

2011-09-12 13:51

CDT

Yes

MAW/BLP

USGS

73.5

1.14

0.00

2.00

Fair

Unspecifed

NONE

2011-08-22 12:15

CDT

Yes

MAW/BLP

USGS

77.1

1.17

-0.01

1.00

Fair

Unspecifed

NONE

2011-08-22 11:52

CDT

Yes

MAW/BLP

USGS

78.9

1.18

-0.01

1.00

Fair

Unspecifed

NONE

2011-08-09 17:40

CDT

Yes

MAW/BLP

USGS

78.8

1.19

-0.03

1.30

Fair

Clear

NONE

2011-08-09 17:18

CDT

Yes

MAW/BLP

USGS

80.8

1.18

-0.03

1.30

Fair

Clear

NONE

2011-04-14 15:59

CDT

Yes

MAW/ABM

USGS

150

1.51

0.00

0.50

Fair

NONE

2011-04-14 12:31

CDT

Yes

MAW/ABM

USGS

148

1.52

0.00

0.30

Fair

NONE

2011-04-14 12:16

CDT

Yes

MAW/ABM

USGS

149

1.52

0.00

0.30

Fair

NONE

2011-03-23 16:16

CDT

Yes

MAW/ABM

USGS

173

1.62

0.00

0.40

Fair

NONE

2011-03-23 15:53

CDT

Yes

MAW/ABM

USGS

176

1.62

0.00

0.40

Fair

NONE

2011-01-26 13:47

CST

Yes

MAW/ABM

USGS

229

1.85

-0.01

0.60

Fair

NONE

2011-01-26 13:19

CST

Yes

MAW/ABM

USGS

220

1.85

0.00

0.50

Fair

NONE

2010-04-05 13:58

CDT

Yes

MAW/ABM

USGS

522

2.89

Unspecified

NONE

2010-04-05 13:35

CDT

Yes

MAW/ABM

USGS

529

2.89

0.00

2.00

Poor

NONE

2010-03-17 11:07

CDT

Yes

MAW/ABm

USGS

609

3.25

-0.01

0.30

Fair

NONE

2010-03-16 12:24

CDT

Yes

MAW/ABM

USGS

640

3.19

0.00

0.30

Fair

NONE

2010-01-27 11:14

CST

Yes

MAW/ABM

USGS

663

3.17

0.00

1.60

Fair

NONE

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U.S. Department of the Interior | U.S. Geological Survey
Title: Surface Water for USA: Streamflow Measurements
URL: https://waterdata.usgs.gov/nwis/measurements?

Page Contact Information: Texas Water Data Support Team
Page Last Modified: 2025-01-05 01:27:36 EST
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