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Bench Mark Sheet for 8768094, Calcasieu Pass LA

Superseded Epoch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Small blue map location marker Unpublished bench mark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  5

                                                                                
Station ID: 8768094                         PUBLICATION DATE:  07/12/2011
Name:       CALCASIEU PASS, EAST JETTY                        
            LA
NOAA Chart: 11347                           Latitude:   29° 46.1' N (  29.76817)
USGS Quad:  CAMERON                         Longitude:  93° 20.6' W ( -93.34289)


To reach the tidal bench marks from Cameron, proceed SW along State Highway
27and then at the end of Davis Street. The bench marks are in the vicinity of
Cameron Parish property known as "Jetty Fishing Pier Facility". The tide station
is located on the Jetty Fishing Pier.  


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


                 PRIMARY BENCH MARK STAMPING:  8094 E 2004
                         DESIGNATION:          876 8094 E

MONUMENTATION:           Flange-encased Rod                    VM#:        17617
AGENCY:                  National Ocean Service (NOS)          IDB PID#:  DJ9387
SETTING CLASSIFICATION:  Stainless steel rod in sleeve         OPUS PID#: DJ9387
LATITUDE:   29° 46.1' N (  29.76833)          LONGITUDE:  93° 20.5' W ( -93.34139)


The primary bench mark is a flange-encased rod located in the grass at the north
end of the parking lot of the boat ramp, 84.2 m (276.2 ft) NE of the NE corner
of the boat ramp, 28.95 m (94.8 ft) west of the centerline of Davis Road, 13.7 m
(44.9 ft) north of the north edge of the pavement of the boat ramp parking lot,
1.1m (3.6 ft ) south of a witness post, being a stainless steel rod is driven 25
m (82.0 ft ) to refusal and encased in a 5 inch PVC pipe and concrete kickblock
set flush with the ground.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  2 of  5

                                                                                
Station ID: 8768094                         PUBLICATION DATE:  07/12/2011
Name:       CALCASIEU PASS, EAST JETTY                        
            LA
NOAA Chart: 11347                           Latitude:   29° 46.1' N (  29.76817)
USGS Quad:  CAMERON                         Longitude:  93° 20.6' W ( -93.34289)


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


                         BENCH MARK STAMPING:  8094 A 2002
                         DESIGNATION:          876 8094 A

MONUMENTATION:           Tidal Station disk                    VM#:        16827
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Concrete pier                         OPUS PID:        
LATITUDE:   29° 45.9' N (  29.76417)          LONGITUDE:  93° 20.6' W ( -93.34264)


The bench mark is a disk set flush in concrete pier at the shore end and on the
north side of a concrete fishing pier known as the Jetty Fishing Pier Facility,
29.9 m (98.1ft) east of the west face or the off shore end of the fishing pier,
18.00 m (59.1 ft) south of the NW corner of the concrete parking area for the
fishing pier, 3.1m (10.2 ft) west of the east edge of the walkway leading to the
pier, 2.5 m (8.2 ft) north of the south face of the pier, 0.3 m (0.98 ft) south
of the north face of the pier.



                         BENCH MARK STAMPING:  8094 B 2002
                         DESIGNATION:          876 8094 B

MONUMENTATION:           Tidal Station disk                    VM#:        16828
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Boulder                               OPUS PID:        
LATITUDE:   29° 45.9' N (  29.76481)          LONGITUDE:  93° 20.6' W ( -93.34283)


The bench mark is a disk set flush in the top of a large boulder located in the
NW section of the Jetty Fishing Pier Facility, 73.2 m (240.2 ft) north of the
north face of the fishing pier, 23.4 m (76.8 ft) west of the NW corner of a
small corrogated guard shed, 17.3 m (56.8 ft) south of the fence line on the
northern property line, and 0.6 m (1.97 ft) east of the west face of the
boulder.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  3 of  5

                                                                                
Station ID: 8768094                         PUBLICATION DATE:  07/12/2011
Name:       CALCASIEU PASS, EAST JETTY                        
            LA
NOAA Chart: 11347                           Latitude:   29° 46.1' N (  29.76817)
USGS Quad:  CAMERON                         Longitude:  93° 20.6' W ( -93.34289)


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


                         BENCH MARK STAMPING:  8094 F 2008
                         DESIGNATION:          876 8094 F

MONUMENTATION:           Flange-encased Rod                    VM#:        18828
AGENCY:                  National Ocean Survey/Service (NOS)   IDB PID#:        
SETTING CLASSIFICATION:  Stainless steel rod in sleeve         OPUS PID:        
LATITUDE:   29° 45.9' N (  29.76494)          LONGITUDE:  93° 20.5' W ( -93.34236)


The bench mark is a flange-encased rod located 10.4 m (34.1 ft) SE of utility
pole (number 61), 19.3 m (63.3 ft) east of the centerline of Davis RD., 54.6 m
(179.1ft) east of the centerline of the east Rock Jetty of the Calcasieu Ship
Channel, 70.1 m (230.0 ft) south of utility pole (no number) located north of
utility pole (number 61), 0.8 m (2.6 ft) west of witness post, being a stainless
steel rod is driven 24 m (78.7 ft) to refusal and encased in a 5-inch PVC pipe
and concrete kick block, set flush with the ground.



                         BENCH MARK STAMPING:  876 8094 SPIP 2008
                         DESIGNATION:          876 8094 SPIP

MONUMENTATION:           Tidal Station disk                    VM#:        18835
AGENCY:                  National Ocean Survey/Service (NOS)   IDB PID#:        
SETTING CLASSIFICATION:  Disk on the sentinal platform         OPUS PID:        
LATITUDE:   29° 46.1' N (  29.76814)          LONGITUDE:  93° 20.6' W ( -93.34292)


The bench mark is a disk set flush on top of the SE corner of the Davit Plate
located on the NW corner of the 3m x 3m (9.8 ft x 9.8 ft) platform, 1.6 m (5.2
ft) SE of the NW corner of the 3m x 3m (9.8 ft x 9.8 ft) platform, 2.3 m (7.5
ft) NE of the SW corner of the 3m x 3m (9.8 ft x 9.8 ft) platform, 3.2 m (10.5
ft) NW of the SE corner of the 3m x 3m (9.8 ft x 9.8 ft) platform 2.2 m (7.2 ft)
SW of the NE corner of the 3m x 3m (9.8 ft x 9.8 ft) platform.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  4 of  5

                                                                                
Station ID: 8768094                         PUBLICATION DATE:  07/12/2011
Name:       CALCASIEU PASS, EAST JETTY                        
            LA
NOAA Chart: 11347                           Latitude:   29° 46.1' N (  29.76817)
USGS Quad:  CAMERON                         Longitude:  93° 20.6' W ( -93.34289)


                            T I D A L   D A T U M S 


Tidal datums at CALCASIEU PASS, EAST JETTY based on:

     LENGTH OF SERIES:      5 YEARS
     TIME PERIOD:           Oct. 2004 - Sept. 2008 & Sept. 2009 - Aug. 2010
     TIDAL EPOCH:           1983-2001
     CONTROL TIDE STATION:  8771510 GALVESTON PLEASURE PIER, GULF OF MEXICO


Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:

     HIGHEST OBSERVED WATER LEVEL (09/13/2008)         =  3.625
     MEAN HIGHER HIGH WATER                     MHHW   =  0.589
     MEAN HIGH WATER                            MHW    =  0.555
     MEAN SEA LEVEL                             MSL    =  0.363
     MEAN TIDE LEVEL                            MTL    =  0.360
     MEAN LOW WATER                             MLW    =  0.165
     MEAN LOWER LOW WATER                       MLLW   =  0.000
     LOWEST  OBSERVED WATER LEVEL (01/02/2003)         = -1.014

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     8094 E 2004                                 1.777    1.222
     8094 A 2002                                 1.809    1.254
     8094 B 2002                                 1.388    0.833
     8094 F 2008                                 1.209    0.654
     876 8094 SPIP 2008                          9.878    9.323


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

                                                                                
Station ID: 8768094                         PUBLICATION DATE:  07/12/2011
Name:       CALCASIEU PASS, EAST JETTY                        
            LA
NOAA Chart: 11347                           Latitude:   29° 46.1' N (  29.76817)
USGS Quad:  CAMERON                         Longitude:  93° 20.6' W ( -93.34289)


                             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 8768094 Calcasieu Pass, LA

Revised: 08/08/2018
NOAA / National Ocean Service
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