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Bench Mark Sheet for 8777812, Rincon Del San Jose 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Superseded Epoch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Small blue map location marker Unpublished bench mark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  4

                                                                                
Station ID: 8777812                         PUBLICATION DATE:  11/20/2017
Name:       RINCON DEL SAN JOSE                               
            TX
NOAA Chart: 11306                           Latitude:   26° 48.1' N (  26.80119)
USGS Quad:  Potrero Lopeno SW, TX           Longitude:  97° 28.2' W ( -97.47056)


To reach the tidal bench marks from the city of Port Mansfield, Willacy County,
Texas travel northerly up the Gulf Intracoastal Waterway (GICW) approximately
24.9 km (15.5 mi) to USCG day beacon structure #24.  The gauge station is on a
1.83 m x 1.83 m (6.0 ft x 6.0 ft) platform about 15.24 m (50.0 ft) east of the
USCG marker #5.  The benchmarks are on the spoil island to the east of the gauge
structure.


                         T I D A L   B E N C H   M A R K S


                 PRIMARY BENCH MARK STAMPING:  7812 B 1990
                         DESIGNATION:          877 7812 B

MONUMENTATION:           Survey disk                           VM#:        12229
AGENCY:                  Conrad Blucher Institute (CBI)        IDB PID#:        
SETTING CLASSIFICATION:  Stainless steel rod                   OPUS PID#: BBFH07
LATITUDE:   26° 48.1' N (  26.80119)          LONGITUDE:  97° 28.0' W ( -97.46731)


The primary bench mark is brass survey disk set 89.9 m (294.9 ft) from benchmark
7812 A 1990. The bench mark is crimped to a stainless steel rod driven 12.2 m
(40.0 ft) to refusal and encased in a 6-inch PVC pipe and concrete kickblock.



                         BENCH MARK STAMPING:  7812 A 1990
                         DESIGNATION:          877 7812 A

MONUMENTATION:           Survey disk                           VM#:        12228
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Stainless steel rod                   OPUS PID:        
LATITUDE:   26° 48.1' N (  26.80156)          LONGITUDE:  97° 28.1' W ( -97.46811)


The bench mark is brass survey disk located on the Spoil Island, 259.1 m (850.1
ft) east of the platform.  The bench mark is crimped to a stainless steel rod
driven 12.2 m (40.0 ft) to refusal and encased in a 6-inch PVC pipe and concrete
kickblock.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  2 of  4

                                                                                
Station ID: 8777812                         PUBLICATION DATE:  11/20/2017
Name:       RINCON DEL SAN JOSE                               
            TX
NOAA Chart: 11306                           Latitude:   26° 48.1' N (  26.80119)
USGS Quad:  Potrero Lopeno SW, TX           Longitude:  97° 28.2' W ( -97.47056)


                         T I D A L   B E N C H   M A R K S


                         BENCH MARK STAMPING:  7812 C 1990
                         DESIGNATION:          877 7812 C

MONUMENTATION:           Survey disk                           VM#:        12230
AGENCY:                  Conrad Blucher Institute (CBI)        IDB PID#:        
SETTING CLASSIFICATION:  Stainless steel rod                   OPUS PID:        
LATITUDE:   26° 48.1' N (  26.80089)          LONGITUDE:  97° 28.0' W ( -97.46683)


The bench mark is a brass survey disk located on the Spoil Island 60 m (196.8
ft) ESE of BM 7812 B 1990.  The bench mark is crimped to a stainless steel rod
driven 12.2 m (44 ft) to refusal and encased in a 6 inch PVC pipe and concrete
kickblock.



                         BENCH MARK STAMPING:  7812 D
                         DESIGNATION:          877 7812 D

MONUMENTATION:           Survey disk                           VM#:        12231
AGENCY:                  Conrad Blucher Institute (CBI)        IDB PID#:        
SETTING CLASSIFICATION:  Stainless steel rod                   OPUS PID:        
LATITUDE:   26° 48.0' N (  26.80019)          LONGITUDE:  97° 28.0' W ( -97.46669)


The bench mark is a brass survey disk located on the Spoil Island, 79.2 m (259.8
ft) SSE of BM 7812 C 1990.  The bench mark is crimped to a stainless steel rod
driven 12.2 m (40.0 ft) to refusal and encased in a 6-inch PVC pipe and concrete
kickblock.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  3 of  4

                                                                                
Station ID: 8777812                         PUBLICATION DATE:  11/20/2017
Name:       RINCON DEL SAN JOSE                               
            TX
NOAA Chart: 11306                           Latitude:   26° 48.1' N (  26.80119)
USGS Quad:  Potrero Lopeno SW, TX           Longitude:  97° 28.2' W ( -97.47056)


                            T I D A L   D A T U M S 


Tidal datums at RINCON DEL SAN JOSE based on:

     LENGTH OF SERIES:      2 years
     TIME PERIOD:           10/12-9/13, 6/16-5/17
     TIDAL EPOCH:           1983-2001
     CONTROL TIDE STATION:  8779770 PORT ISABEL, LAGUNA MADRE


Elevations of tidal datums referred to Mean Sea Level (MSL), in METERS:

     MEAN SEA LEVEL                             MSL    =  0.000
     North American Vertical Datum              NAVD88 = -0.132

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                                MSL

     7812 B 1990                                          1.647
     7812 A 1990                                          0.874
     7812 C 1990                                          1.430
     7812 D                                               1.685


Foot Notes:

This station has been determined to be Non-tidal for tidal datum purposes. There
is either no measureable periodic rise and fall of the tide at this location, or
it may be present but inconsistent, or the periodic tide is present and
consistent, however the Mean Range of Tide (MN) is negligible, that is below the
established tidal/non-tidal threshold of 0.03m (0.10ft). Only the datum of local
Mean Sea Level (MSL) is published at these stations. For Nautical Charting Datum
applications, a non-tidal Low Water Datum (LWD) is established as 0.50ft (0.15m)
below MSL.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  4 of  4

                                                                                
Station ID: 8777812                         PUBLICATION DATE:  11/20/2017
Name:       RINCON DEL SAN JOSE                               
            TX
NOAA Chart: 11306                           Latitude:   26° 48.1' N (  26.80119)
USGS Quad:  Potrero Lopeno SW, TX           Longitude:  97° 28.2' W ( -97.47056)


                             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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Products available at 8777812 Rincon Del San Jose, TX

Revised: 08/08/2018
NOAA / National Ocean Service
Web site owner: Center for Operational Oceanographic Products and Services