NOAA Web Site Link Tides and Currents Home Page Transparent placeholder image

Bench Mark Sheet for 9751639, Charlotte Amalie VI

Superseded Epoch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Small blue map location marker Unpublished bench mark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  7

                                                                                
Station ID: 9751639                                PUBLICATION DATE:  01/13/2005
Name:       CHARLOTTE AMALIE, ST. THOMAS                      
            VI
NOAA Chart: 25649                                  Latitude:         18° 20.1' N
USGS Quad:  CENTRAL ST THOMAS                      Longitude:        64° 55.2' W


To reach the tidal bench marks from the Harry S. Truman Airport on St. Thomas,
take Airport Road to Highway 30, proceed on Highway 30 east to Charlotte Amalie,
then  continue on Highway 30 past the U.S. Coast Guard Dock at Kings Wharf to
the Havensight Mall and West Indian Cruise Ship Dock about 5.6 km (3.5 mi) from
Airport Road).  The bench marks are on the West Indian Dock compound, along
Highway 30, and on the U.S. Coast Guard compound.  The tide station is at the NE
end of the West Indian Dock compound at the base of a small wooden pier.


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


                 PRIMARY BENCH MARK STAMPING:  1639 F 1983
                         DESIGNATION:          975 1639 F

MONUMENTATION:           Tidal Station disk                        VM#:     1372
AGENCY:                  National Ocean Survey (NOS)               PID#:  DL3908
SETTING CLASSIFICATION:  Concrete base


The primary bench mark is a disk set flush in the east corner of a 1.83 m x 2.44
m (6.0 ft x 8.0 ft) concrete mooring bit base in the West Indian Dock compound
(bollard no longer exists), 25.05 m (82.2 ft) west of the concrete block wall of
the Yacht Haven parking lot, 11.70 m (38.4 ft) north of the north face of a
cargo loading ramp, 5.18 m (17.0 ft) ENE of the west face of the bulkhead, and
0.61 m (2.0 ft) above the pier deck.



                         BENCH MARK STAMPING:  NO 3 1975
                         DESIGNATION:          975 1639 TIDAL 3

MONUMENTATION:           Tidal Station disk                        VM#:     1375
AGENCY:                  National Ocean Survey (NOS)               PID#:  DL3911
SETTING CLASSIFICATION:  Concrete pad


The bench mark is a disk set flush in a concrete pad at the U.S. Coast Guard
Station on the south side of the base near the water, 12.47 m (40.9 ft) west of
the most westerly of two black cannons, 10.03 m (32.9 ft) north of the concrete
at the water's edge, 6.89 m (22.6 ft) south of the SW corner of a garage, and
flush with the concrete.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  2 of  7

                                                                                
Station ID: 9751639                                PUBLICATION DATE:  01/13/2005
Name:       CHARLOTTE AMALIE, ST. THOMAS                      
            VI
NOAA Chart: 25649                                  Latitude:         18° 20.1' N
USGS Quad:  CENTRAL ST THOMAS                      Longitude:        64° 55.2' W


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


                         BENCH MARK STAMPING:  NO 5 1975
                         DESIGNATION:          975 1639 TIDAL 5

MONUMENTATION:           Tidal Station disk                        VM#:     1377
AGENCY:                  National Ocean Survey (NOS)               PID#:  DL3910
SETTING CLASSIFICATION:  Concrete step


The bench mark is a disk set flush on the west side of the entrance to the main
Administration Building at the U.S. Coast Guard Station, 8.32 m (27.3 ft) east
of the east curb of the road leading to the station, 1.98 m (6.5 ft) SW of the
NW side of the concrete landing, 1.07 m (3.5 ft) west of the foundation of the
building, and flush with the ground.



                         BENCH MARK STAMPING:  1639 D 1980
                         DESIGNATION:          975 1639  D

MONUMENTATION:           Tidal Station disk                        VM#:     1380
AGENCY:                  National Ocean Survey (NOS)               PID:         
SETTING CLASSIFICATION:  Concrete bulkhead


The bench mark is a disk set flush in the concrete bulkhead near the
intersection of Highway 30 and Trompeter Gade, across the street from the
Cosmopolitan Building, 9.40 m (30.8 ft) south of the south side of Highway 30,
and 0.52 m (1.7 ft) north of the bulkhead face.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  3 of  7

                                                                                
Station ID: 9751639                                PUBLICATION DATE:  01/13/2005
Name:       CHARLOTTE AMALIE, ST. THOMAS                      
            VI
NOAA Chart: 25649                                  Latitude:         18° 20.1' N
USGS Quad:  CENTRAL ST THOMAS                      Longitude:        64° 55.2' W


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


                         BENCH MARK STAMPING:  1639 G 1983
                         DESIGNATION:          975 1639 G

MONUMENTATION:           Tidal Station disk                        VM#:     1382
AGENCY:                  National Ocean Survey (NOS)               PID#:  DL3907
SETTING CLASSIFICATION:  Concrete bulkhead cap


The bench mark is a disk set flush in the NE corner of the concrete bulkhead cap
on the West Indian Dock, 26.79 m (87.9 ft) SW of the south corner of a concrete
block wall of the Yacht Haven parking lot, 1.07 m (3.5 ft) south of the SE face
of concrete steps leading to water, and 1.07 m (3.5 ft) NE of the
northeastern-most mooring bollard.



                         BENCH MARK STAMPING:  1639 J 1983
                         DESIGNATION:          975 1639 J

MONUMENTATION:           Tidal Station disk                        VM#:     1384
AGENCY:                  National Ocean Survey (NOS)               PID:         
SETTING CLASSIFICATION:  Concrete walk


The bench mark is a disk set flush in a concrete walk beneath the steps at the
main entrance to the West Indies Dock Administration Building on the south side
of the building, 5.33 m (17.5 ft) east of the south corner of the Administration
Building, 1.58 m (5.2 ft) NNW of the NW face of the stair landing, 1.37 m (4.5
ft) SSE of the SE face of the building, and 0.12 m (0.4 ft) NW of the bottom
step.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  4 of  7

                                                                                
Station ID: 9751639                                PUBLICATION DATE:  01/13/2005
Name:       CHARLOTTE AMALIE, ST. THOMAS                      
            VI
NOAA Chart: 25649                                  Latitude:         18° 20.1' N
USGS Quad:  CENTRAL ST THOMAS                      Longitude:        64° 55.2' W


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


                         BENCH MARK STAMPING:  1639 L 1986
                         DESIGNATION:          975 1639 L

MONUMENTATION:           Tidal Station disk                        VM#:     1385
AGENCY:                  National Ocean Survey (NOS)               PID#:  DL3909
SETTING CLASSIFICATION:  Concrete retaining wall


The bench mark is a disk set flush in the top of a 0.3 m (1 ft) wide concrete
retaining wall extending from the south face of the salt water pumping station
on the south side of Highway 30, 11.34 m (37.2 ft) south of the NE corner of the
Pumping Station Building, 2.53 m (8.3 ft) west of the west curb of the highway,
1.13 m (3.7 ft) east of the SE corner of the building, and 0.70 m (2.3 ft) above
the sidewalk.



                         BENCH MARK STAMPING:  1639 M 1991
                         DESIGNATION:          975 1639 M

MONUMENTATION:           Tidal Station disk                        VM#:     4613
AGENCY:                  National Ocean Service (NOS)              PID#:  TV1548
SETTING CLASSIFICATION:  Concrete bulkhead


The benchmark is a disk set flush in the north face of the concrete bulkhead on
the West Indies Dock, 16.79 m (55.1 ft) north of a cinder block flower box which
runs east-west, 8.23 m (27.0 ft) west of the center of two bitts, 7.92 m (26.0
ft) east of the center of two bitts, and 0.3 m (1 ft) south of the water's edge.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  5 of  7

                                                                                
Station ID: 9751639                                PUBLICATION DATE:  01/13/2005
Name:       CHARLOTTE AMALIE, ST. THOMAS                      
            VI
NOAA Chart: 25649                                  Latitude:         18° 20.1' N
USGS Quad:  CENTRAL ST THOMAS                      Longitude:        64° 55.2' W


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


                         BENCH MARK STAMPING:  1639 N 1991
                         DESIGNATION:          975 1639 N

MONUMENTATION:           Tidal Station disk                        VM#:     4614
AGENCY:                  National Ocean Service (NOS)              PID:         
SETTING CLASSIFICATION:  Concrete pier


The benchmark is a disk set flush on the new concrete pier deck extension of the
West Indies Dock compund on the west side of the dock, 11.98 m (39.3 ft) NE of
the second light pole, 8.53 m (28.0 ft) SE of the NW face of the dock, 1.22 m
(4.0 ft) SW of the first light pole, and 0.61 m (2.0 ft) NW of the southern
water's edge.



                         BENCH MARK STAMPING:  1639 P 2001
                         DESIGNATION:          975 1639 P

MONUMENTATION:           Tidal Station disk                        VM#:    16777
AGENCY:                  National Ocean Service (NOS)              PID:         
SETTING CLASSIFICATION:  Concrete pier


The bench mark is a disk set flush near the western end of the concrete pier on
the West Indies dock compund, 30.2 m (99.1 ft) west of the 4th bollard counting
from the western end, 17.8 m (58.4 ft) east of the 2nd bollard counting from the
western end of the ier, 15.2 m (49.8 ft) north of the centerline of a paved road
only for taxis which runs easterly and parallel to the cruise ships, 2.85 m
(9.35 ft) north of the 3rd bollard counting from the western end of the docks,
and 0.5 m (1.64 ft) south of the waters edge at the pier face. Note: A spaced
row of bollards on the original docks runs east and west, these are large and
0.6 m (2 ft) tall and not to be mixed up with the pairs of small bitts also
running east and west.  

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  6 of  7

                                                                                
Station ID: 9751639                                PUBLICATION DATE:  01/13/2005
Name:       CHARLOTTE AMALIE, ST. THOMAS                      
            VI
NOAA Chart: 25649                                  Latitude:         18° 20.1' N
USGS Quad:  CENTRAL ST THOMAS                      Longitude:        64° 55.2' W


                            T I D A L   D A T U M S 


Tidal datums at CHARLOTTE AMALIE, ST. THOMAS based on:

     LENGTH OF SERIES:      19 Years
     TIME PERIOD:           January 1983 - December 2001
     TIDAL EPOCH:           1983-2001
     CONTROL TIDE STATION:   


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

     HIGHEST OBSERVED WATER LEVEL (09/16/1995)         =  1.133
     MEAN HIGHER HIGH WATER                     MHHW   =  0.240
     MEAN HIGH WATER                            MHW    =  0.227
     MEAN TIDE LEVEL                            MTL    =  0.121
     MEAN SEA LEVEL                             MSL    =  0.114
     MEAN LOW WATER                             MLW    =  0.014
     MEAN LOWER LOW WATER                       MLLW   =  0.000
     LOWEST  OBSERVED WATER LEVEL (02/06/1985)         = -0.449



Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     1639 F 1983                                 1.666    1.439
     NO 3 1975                                   1.443    1.216
     NO 5 1975                                   1.624    1.397
     1639 D 1980                                 0.987    0.760
     1639 G 1983                                 2.466    2.239
     1639 J 1983                                 3.099    2.872
     1639 L 1986                                 2.417    2.190
     1639 M 1991                                 2.472    2.245
     1639 N 1991                                 2.484    2.257
     1639 P 2001                                 2.455    2.228


                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  7 of  7

                                                                                
Station ID: 9751639                                PUBLICATION DATE:  01/13/2005
Name:       CHARLOTTE AMALIE, ST. THOMAS                      
            VI
NOAA Chart: 25649                                  Latitude:         18° 20.1' N
USGS Quad:  CENTRAL ST THOMAS                      Longitude:        64° 55.2' W


                             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 any other fixed island datum.

This tide station location has a defined island datum (VIVD09).  Island datums
are specific fixed geodetic datums whose elevation relationship to local MSL
and other tidal datums may not be consistent from one location to another.

Virgin Islands Vertical Datum of 2009 (VIVD09) is a fixed datum derived from
a simultaneous, least squares, minimum constraint adjustment of leveling
observations.  Local mean sea level relative to the 1983-2001 National Tidal
Datum Epoch observed at tide stations 9751401 located at Lime Tree Bay,
St. Croix, 9751381 located at Lameshur Bay, St. John, and 9751639 located at
Charlotte Amalie, St Thomas was held fixed as the single initial constraint.
VIVD09 replaces all previous height system as the national standard geodetic
reference for heights in the Virgin Islands.  Bench mark elevations relative
to VIVD09 are available from NGS through the World Wide Web at 
National Geodetic Survey.

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 VIVD09 elevation is shown on the Elevations of Tidal Datums Table Referred
to MLLW only when two or more of the bench marks listed have VIVD09 elevations.
The VIVD09 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, VIVD09 bench mark elevations computed indirectly from the tidal
datums elevation table may differ slightly from VIVD09 elevations listed for
each bench mark in the NGS database.

Return to Top
Products available at 9751639 Charlotte Amalie, VI

Revised: 10/15/2013
NOAA / National Ocean Service
Web site owner: Center for Operational Oceanographic Products and Services