Bench Mark Sheet for 8770822, Texas Point, Sabine Pass TX

Superseded Epoch

Large map location marker Station Location
Small red map location marker Published bench mark
Small blue map location marker Unpublished bench mark

Bench mark positions only appear on the map if their coordinates in the CO-OPS database are at the precision of degrees/minutes/seconds/and tenths of seconds. If the coordinates are less precise, the mark will not appear.

Printable version

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
Datums Page                                                        Page  1 of  6

                                                                                
Station ID: 8770822                         PUBLICATION DATE:  04/16/2018
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:        
LATITUDE:   29° 41.4' N (  29.69050)          LONGITUDE:  93° 50.7' W ( -93.84519)


The bench mark is a metal rod driven into the ground located along the SW edge
of an old caliche road leading to the historic pilots station, 18.9m (62.0 ft)
SW of a wooden utility pole with a blue spray painted B, 3.5m (11.5 ft) SW from
the approximate centerline of the road, and 0.9m (3.0 ft) north from the
approximate center of a large bush, driven 26.8m (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:  04/16/2018
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:        
LATITUDE:   29° 41.5' N (  29.69094)          LONGITUDE:  93° 50.8' W ( -93.84617)


The bench mark is a metal rod driven into the ground located along the SW edge
of an old caliche road leading to the historic pilots station, 9.3m (30.5 ft)
southwest from a wooden utility pole with a blue spray painted C, and 4.1m (13.5
ft) SW from the approximate centerline of the road, driven 26.8m (88 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:        
LATITUDE:   29° 41.5' N (  29.69225)          LONGITUDE:  93° 50.9' W ( -93.84908)


The bench mark is a metal rod driven into the ground located along the SW edge
of an old caliche road leading to the historic pilots station, approximately
8.3m (27.3 ft) SW of a wooden utility pole marked with a blue spray painted D,
and approximately 4.1m (13.5 ft) south from the approximate centerline of the
road, driven 26.8m (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:  04/16/2018
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:        
LATITUDE:   29° 41.6' N (  29.69328)          LONGITUDE:  93° 51.1' W ( -93.85133)


The bench mark is a metal rod driven into the ground located along the SW edge
of an old caliche road leading to the historic pilots station, 16.8m (55.0 ft)
WNW of a wide berth rocky opening to the water on the south side of the caliche
road, 9.8m (32.0 ft) ESE of a mini foot path to the water, 3.7m (12.0 ft) south
from the approximate centerline of the road, 0.9m (3.0 ft) south from the
southern edge of the road, driven 26.8m (88 ft) until refusal, and is recessed 3
inches (8 cm) from ground level.



                         BENCH MARK STAMPING:  0822 G 2017
                         DESIGNATION:          877 0822 G

MONUMENTATION:           Metal Rod                             VM#:        22490
AGENCY:                  NOS                                   IDB PID#:        
SETTING CLASSIFICATION:  Stainless steel rod                   OPUS PID:        
LATITUDE:   29° 41.6' N (  29.69389)          LONGITUDE:  93° 51.1' W ( -93.85222)


The bench mark is a stainless steel rod driven 25.60 m (84 ft) to refusal and
encased in 6 in PVC pipe with concrete kick block, located 114 m (374.0 ft) WNW
of bench mark 0822 E, 11.3 m (37.07 ft) ESE of an unmarked last power pole on
the west side of the road, 3.9 m (12.79 ft) SW of the centerline of Jetty road. 
The bench mark is 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:  04/16/2018
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:                  NOS                                   IDB PID#:        
SETTING CLASSIFICATION:  Stainless steel rod                   OPUS PID:        
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 bench mark is a rod driven
100 ft (30.48 m) to refusal, encased in a 6 inch PVC pipe which extends 0.9 m
(ft) above grade.  This mark is a reset of 877 0822 TIDAL 2.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  5 of  6

                                                                                
Station ID: 8770822                         PUBLICATION DATE:  04/16/2018
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:      4 YEARS
     TIME PERIOD:           July 2013 - June 2017
     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)         =  1.398
     MEAN HIGHER HIGH WATER                     MHHW   =  0.588
     MEAN HIGH WATER                            MHW    =  0.552
     MEAN SEA LEVEL                             MSL    =  0.352
     MEAN TIDE LEVEL                            MTL    =  0.349
     MEAN LOW WATER                             MLW    =  0.147
     MEAN LOWER LOW WATER                       MLLW   =  0.000
     LOWEST  OBSERVED WATER LEVEL (02/09/2016)         = -0.929

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     0822 B 2010                                 0.594    0.042
     0822 C 2010                                 0.652    0.100
     0822 D 2010                                 0.686    0.134
     0822 E 2010                                 1.149    0.597
     0822 G 2017                                 1.321    0.769
     TXPT 02 RESET 2017                          0.773    0.221


Foot Notes:

Bench marks 0822 G 2017 and TXPT 02 RESET 2017 are based on one differential
leveling connection and do not meet the quality control standards of the NOS.
Therefore, caution should be used when deriving elevations for these marks.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  6 of  6

                                                                                
Station ID: 8770822                         PUBLICATION DATE:  04/16/2018
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.

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