U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 6
Station ID: 8770822 PUBLICATION DATE: 05/01/2020
Name: TEXAS POINT, SABINE PASS
TX
NOAA Chart: 11342 Latitude: 29° 41.4' N ( 29.68939)
USGS Quad: TEXAS POINT Longitude: 93° 50.5' W ( -93.84192)
To reach the bench marks from the intersection of Highway 87 and 3322 in the
town of Sabine Pass, proceed south on RD 3322 for 2.48 km (1.55 mi) and bear
right at the T in the road near Sabine Pass Battleground SHP. Continue for 4.48
km (2.80 mi) to the end of the road at the cul-de-sac. The tide station is on
the NW corner of the first finger pier belonging to the Sabine Bank Pilots
Station.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 0822 B 2010
DESIGNATION: 877 0822 B
MONUMENTATION: Metal Rod VM#: 20277
AGENCY: DNR-TA IDB PID:
SETTING CLASSIFICATION: Metal rod OPUS PID#: BBFY60
LATITUDE: 29° 41.4' N ( 29.69044) LONGITUDE: 93° 50.7' W ( -93.84514)
The primary bench mark is a metal rod located along the SW edge of an old
caliche road leading to the historic pilots station, 18.90m (62.0 ft) SW of a
wooden utility pole with a blue spray painted B, 3.50m (11.5 ft) SW from the
approximate centerline of the road, and 0.90m (3.0 ft) north from the
approximate center of a large bush. The datum point is the top of a metal rod
driven 26.80m (88 ft) until refusal and is encased in a 6" PVC pipe that
projects 12" above ground.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 6
Station ID: 8770822 PUBLICATION DATE: 05/01/2020
Name: TEXAS POINT, SABINE PASS
TX
NOAA Chart: 11342 Latitude: 29° 41.4' N ( 29.68939)
USGS Quad: TEXAS POINT Longitude: 93° 50.5' W ( -93.84192)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 0822 C 2010
DESIGNATION: 877 0822 C
MONUMENTATION: Metal Rod VM#: 20278
AGENCY: DNR-TA IDB PID:
SETTING CLASSIFICATION: Metal rod. OPUS PID#: BBFY59
LATITUDE: 29° 41.5' N ( 29.69094) LONGITUDE: 93° 50.8' W ( -93.84617)
The bench mark is a metal rod located along the SW edge of an old caliche road
leading to the historic pilots station, 9.30m (30.5 ft) southwest from a wooden
utility pole with a blue spray painted C, and 4.10m (13.5 ft) SW from the
approximate centerline of the road. The datum point is the top of a metal rod
driven 26.80m (88.0 ft) until refusal and is encased in a 6" PVC pipe that
projects 12" above ground.
BENCH MARK STAMPING: 0822 D 2010
DESIGNATION: 877 0822 D
MONUMENTATION: Metal Rod VM#: 20279
AGENCY: DNR-TA IDB PID:
SETTING CLASSIFICATION: Metal rod. OPUS PID#: BBFY58
LATITUDE: 29° 41.5' N ( 29.69219) LONGITUDE: 93° 50.9' W ( -93.84906)
The bench mark is a metal rod located along the SW edge of an old caliche road
leading to the historic pilots station, approximately 8.30m (27.3 ft) SW of a
wooden utility pole marked with a blue spray painted D, and approximately 4.10m
(13.5 ft) south from the approximate centerline of the road. The datum point is
the top of a metal rod driven 26.80m (88 ft) until refusal and is encased in a
6" PVC pipe that projects 12" above ground.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 6
Station ID: 8770822 PUBLICATION DATE: 05/01/2020
Name: TEXAS POINT, SABINE PASS
TX
NOAA Chart: 11342 Latitude: 29° 41.4' N ( 29.68939)
USGS Quad: TEXAS POINT Longitude: 93° 50.5' W ( -93.84192)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 0822 E 2010
DESIGNATION: 877 0822 E
MONUMENTATION: Metal Rod VM#: 20280
AGENCY: DNR-TA IDB PID:
SETTING CLASSIFICATION: Metal rod OPUS PID#: BBFY57
LATITUDE: 29° 41.6' N ( 29.69328) LONGITUDE: 93° 51.1' W ( -93.85133)
The bench mark is a metal rod located along the SW edge of an old caliche road
leading to the historic pilots station, 16.80m (55.0 ft) WNW of a wide berth
rocky opening to the water on the south side of the caliche road, 9.80m (32.0
ft) ESE of a mini foot path to the water, 3.70m (12.0 ft) south from the
approximate centerline of the road, and 0.90m (3.0 ft) south from the southern
edge of the road. The datum point is set 0.08m (0.25 ft) below ground, being the
top of a metal rod driven 26.80m (88.0 ft) to refusal.
BENCH MARK STAMPING: 0822 G 2017
DESIGNATION: 877 0822 G
MONUMENTATION: Metal Rod VM#: 22490
AGENCY: National Ocean Service (NOS) IDB PID:
SETTING CLASSIFICATION: Stainless steel rod OPUS PID#: BBFY56
LATITUDE: 29° 41.6' N ( 29.69389) LONGITUDE: 93° 51.1' W ( -93.85222)
The bench mark is a stainless steel rod located 114.0 m (374.0 ft) WNW of bench
mark 0822 E, 11.30 m (37.07 ft) ESE of an unmarked last power pole on the west
side of the road, 3.90 m (12.79 ft) SW of the centerline of Jetty road. The
datum point is the top of a stainless steel rod driven 25.60 m (84 ft) to
refusal and encased in 6 in PVC pipe with concrete kick block.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 6
Station ID: 8770822 PUBLICATION DATE: 05/01/2020
Name: TEXAS POINT, SABINE PASS
TX
NOAA Chart: 11342 Latitude: 29° 41.4' N ( 29.68939)
USGS Quad: TEXAS POINT Longitude: 93° 50.5' W ( -93.84192)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: TXPT 02 RESET 2017
DESIGNATION: 877 0822 TIDAL 2 RESET
MONUMENTATION: Metal Rod VM#: 22491
AGENCY: National Ocean Service (NOS) IDB PID:
SETTING CLASSIFICATION: Stainless steel rod OPUS PID#: BBFY55
LATITUDE: 29° 41.4' N ( 29.68967) LONGITUDE: 93° 50.6' W ( -93.84336)
The bench mark is a stainless steel rod located on the SW side of Caliche Rd,
36.08 ft (11.0 m) WSW from the Captain Wade J. Leblanc memorial wheel sign,
18.37 ft (5.6 m) SW from the approximate centerline of the road, and 5.25 ft
(1.6 m) west of an A.T.T. communications post. The datum point is the top of a
stainless steel rod driven 30.48m (100 ft) to refusal, encased in a 6 inch PVC
pipe which extends 0.9 m (ft) above grade.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 6
Station ID: 8770822 PUBLICATION DATE: 05/01/2020
Name: TEXAS POINT, SABINE PASS
TX
NOAA Chart: 11342 Latitude: 29° 41.4' N ( 29.68939)
USGS Quad: TEXAS POINT Longitude: 93° 50.5' W ( -93.84192)
T I D A L D A T U M S
Tidal datums at TEXAS POINT, SABINE PASS based on:
LENGTH OF SERIES: 5 YEARS
TIME PERIOD: July 2013 - June 2018
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION: 8770570 SABINE PASS NORTH
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
HIGHEST OBSERVED WATER LEVEL (06/22/2017) = 1.402
MEAN HIGHER HIGH WATER MHHW = 0.589
MEAN HIGH WATER MHW = 0.552
MEAN SEA LEVEL MSL = 0.352
MEAN TIDE LEVEL MTL = 0.350
North American Vertical Datum NAVD88 = 0.340
MEAN LOW WATER MLW = 0.148
MEAN LOWER LOW WATER MLLW = 0.000
LOWEST OBSERVED WATER LEVEL (02/09/2016) = -0.925
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
0822 B 2010 0.598 0.046
0822 C 2010 0.656 0.104
0822 D 2010 0.690 0.138
0822 E 2010 1.153 0.601
0822 G 2017 1.324 0.772
TXPT 02 RESET 2017 0.777 0.225
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 6
Station ID: 8770822 PUBLICATION DATE: 05/01/2020
Name: TEXAS POINT, SABINE PASS
TX
NOAA Chart: 11342 Latitude: 29° 41.4' N ( 29.68939)
USGS Quad: TEXAS POINT Longitude: 93° 50.5' W ( -93.84192)
D E F I N I T I O N S
Mean Sea Level (MSL) is a tidal datum determined over a 19-year National Tidal
Datum Epoch. It pertains to local mean sea level and should not be confused
with the fixed datums of North American Vertical Datum of 1988 (NAVD88).
NAVD88 is a fixed datum derived from a simultaneous, least squares, minimum
constraint adjustment of Canadian/Mexican/United States leveling observations.
Local mean sea level observed at Father Point/Rimouski, Canada was held fixed as
the single initial constraint. NAVD88 replaces NGVD29 as the national
standard geodetic reference for heights. Bench mark elevations relative to
NAVD88 are available from NGS through the World Wide Web at
National Geodetic Survey.
NGVD29 is a fixed datum adopted as a national standard geodetic reference for
heights but is now considered superseded. NGVD29 is sometimes referred to as
Sea Level Datum of 1929 or as Mean Sea Level on some early issues of Geological
Survey Topographic Quads. NGVD29 was originally derived from a general
adjustment of the first-order leveling networks of the U.S. and Canada after
holding mean sea level observed at 26 long term tide stations as fixed.
Numerous local and wide-spread adjustments have been made since establishment in
1929. Bench mark elevations relative to NGVD29 are available from the National
Geodetic Survey (NGS) data base via the World Wide Web at
National Geodetic Survey.
NAVD88 and NGVD29 are fixed geodetic datums whose elevation relationships to
local MSL and other tidal datums may not be consistent from one location to
another.
The Vertical Mark Number (VM#) and PID# shown on the bench mark sheet are unique
identifiers for bench marks in the tidal and geodetic databases, respectively.
Each bench mark in either database has a single, unique VM# and/or PID# assigned.
Where both VM# and PID# are indicated, both tidal and geodetic elevations are
available for the bench mark listed. The NGS's Integrated Data Base (IDB PID)
provides geodetic datum based on traditionally leveled and bluebooked ties to
the National Spatial Reference System(NSRS) https://www.ngs.noaa.gov/datasheets/.
The NGS Online Positioning User Service (OPUS PID) provides geodetic datum based
on GPS position & tie it to the NSRS https://www.ngs.noaa.gov/OPUS/.
The NAVD88 elevation is shown on the Elevations of Tidal Datums Table Referred
to MLLW only when two or more of the bench marks listed have NAVD88 elevations.
The NAVD88 elevation relationship shown in the table is derived from an average
of several bench mark elevations relative to tide station datum. As a result of
this averaging, NAVD88 bench mark elevations computed indirectly from the tidal
datums elevation table may differ slightly from NAVD88 elevations listed for
each bench mark in the NGS database.