Superseded Bench Mark Sheet for 9751401, Lime Tree Bay VI

Present Epoch

Printable version

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
Datums Page                                                        Page  1 of  7

                                                   PUBLICATION DATE:  03/19/1990
Station ID: 9751401                                SUPERCEDED DATE:   04/21/2003
Name:       SAINT CROIX, LIMETREE BAY                         
            VIRGIN ISLANDS
NOAA Chart: 25641                                  Latitude:         17° 41.8' N
USGS Quad:  CHRISTIANSTED                          Longitude:        64° 45.2' W


To reach the tidal bench marks from the intersection of Highway 64 and Highway
66 at the airport, proceed east on Highway 66 for 1.4 miles (2.3 km) to a
traffic light at the corner of Hess Oil Corporation, turn right and continue
south for 1.5 miles (2.4 km) to the entrance gate of St. Croix Container Port,
enter through the gate, drive past the guard shack, and go through another gate.
 The bench marks are on the pier and the adjacent pier.  The tide gage and staff
are on the south face of the pier.


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


                 PRIMARY BENCH MARK STAMPING:  975 1401 M 1983

MONUMENTATION:           Survey Disk                               VM#:     1636
AGENCY:                                                            PID#:  DK7165
SETTING CLASSIFICATION:  Concrete Pier Deck


The bench mark is set flush at the southern end of the concrete St. Croix
Container Port pier, 54.0 feet (16.5 m) east of the SW corner of the pier, 5.5
feet (1.7 m) NE of the NE corner of the tide house, 2.7 feet (0.8 m) SW of the
NW corner of the SE stop for an overhead crane, and 1.9 feet (0.6 m) north of
the south face of the pier.



                         BENCH MARK STAMPING:  1401 B 1977

MONUMENTATION:           Survey Disk                               VM#:     1630
AGENCY:                                                            PID:         
SETTING CLASSIFICATION:  Concrete Base


The bench mark is set flush in a concrete base for a mooring bollard at the NW
corner of the Hess Oil Corporation pier, 40.8 feet (12.4 m) SE of the second
light pole on the west side of the pier, 35.6 feet (10.9 m) NE of fire plug
#724, 4.0 feet (1.2 m) west of the most northerly mooring bollard, and 0.7 foot
(0.2 m) above the pier.

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

                                                   PUBLICATION DATE:  03/19/1990
Station ID: 9751401                                SUPERCEDED DATE:   04/21/2003
Name:       SAINT CROIX, LIMETREE BAY                         
            VIRGIN ISLANDS
NOAA Chart: 25641                                  Latitude:         17° 41.8' N
USGS Quad:  CHRISTIANSTED                          Longitude:        64° 45.2' W


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


                         BENCH MARK STAMPING:  1401 C 1977

MONUMENTATION:           Survey Disk                               VM#:     1631
AGENCY:                                                            PID:         
SETTING CLASSIFICATION:  Concrete Piping Bridge


The bench mark is set flush in the top of the SE corner of a concrete piping
bridge on the Hess Oil Corporation pier, near the SW corner of tank field #56
and a gate leading to the St. Croix Container Port pier, about 0.5 foot (0.2 m)
above the ground.



                         BENCH MARK STAMPING:  975 1401 H 1983

MONUMENTATION:           Survey Disk                               VM#:     1632
AGENCY:                                                            PID:         
SETTING CLASSIFICATION:  Concrete Rim of Manhole


The bench mark is set flush in the concrete rim of a manhole on the St. Croix
Container Port pier near the Port Authority office and warehouse, 589 feet (180
m) SE of the steps at the SE corner of the warehouse, 5.5 feet (1.7 m) south of
a curb running thru a fence to the Hess Oil Company pier, 3.5 feet (1.1 m) north
of a Port Authority property fence running east-west, and 0.5 foot (0.2 m) above
the pier.

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

                                                   PUBLICATION DATE:  03/19/1990
Station ID: 9751401                                SUPERCEDED DATE:   04/21/2003
Name:       SAINT CROIX, LIMETREE BAY                         
            VIRGIN ISLANDS
NOAA Chart: 25641                                  Latitude:         17° 41.8' N
USGS Quad:  CHRISTIANSTED                          Longitude:        64° 45.2' W


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


                         BENCH MARK STAMPING:  975 1401 J 1983

MONUMENTATION:           Survey Disk                               VM#:     1633
AGENCY:                                                            PID#:  DK7166
SETTING CLASSIFICATION:  Concrete Footing


The bench mark is set flush in the concrete footing of the eastern crane rail
track on the St. Croix Container Port pier, 249.2 feet (76.0 m) north of the
south end of the pier, 55.2 feet (16.8 m) east of the west face of the pier,
16.5 feet (5.0 m) SW of the NW corner of the south fueling station, 14.8 feet
(4.5 m) NW of the SW corner of the south fueling station, and 5.9 feet (1.8 m)
west of the fueling station.



                         BENCH MARK STAMPING:  975 1401 K 1983

MONUMENTATION:           Survey Disk                               VM#:     1634
AGENCY:                                                            PID#:  DK7167
SETTING CLASSIFICATION:  Concrete Footing


The bench mark is set flush in the concrete footing of the eastern crane rail
track on St. Croix Container Port pier, 112 feet (34 m) NW of the fourth light
pole from the south in the west row of lights on the pier, 55.4 feet (16.9 m)
east of the west face of the pier, 16.3 feet (5.0 m) SW of the NW corner of the
north fueling station, and 15.1 feet (4.6 m) NW of the SW corner of the north
fueling station.

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

                                                   PUBLICATION DATE:  03/19/1990
Station ID: 9751401                                SUPERCEDED DATE:   04/21/2003
Name:       SAINT CROIX, LIMETREE BAY                         
            VIRGIN ISLANDS
NOAA Chart: 25641                                  Latitude:         17° 41.8' N
USGS Quad:  CHRISTIANSTED                          Longitude:        64° 45.2' W


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


                         BENCH MARK STAMPING:  975 1401 L 1983

MONUMENTATION:           Survey Disk                               VM#:     1635
AGENCY:                                                            PID#:  DK7168
SETTING CLASSIFICATION:  Concrete Pier Deck


The bench mark is set flush in the NW corner of the concrete St. Croix Container
Port pier, 4.5 feet (1.4 m) south of the NW corner of the pier, 3.5 feet (1.1 m)
west of the SW corner of the NW stop for an overhead crane, 3.2 feet (1.0 m)
north of the center of the most northern bollard on the west side of the pier,
and 1.5 feet (0.5 m) east of the west face of the pier.



                         BENCH MARK STAMPING:  ELEV 11.505

MONUMENTATION:           Survey Disk                               VM#:     1637
AGENCY:                                                            PID:         
SETTING CLASSIFICATION:  Concrete Footing


The bench mark is set flush in concrete along the eastern rail for a crane on
the St. Croix Container Port pier, 109 feet (33 m) SW of the third light pole
from the south in the west row of lights, 56.0 feet (17.1 m) east of the west
face of the pier, 50.0 feet (15.2 m) NNW of the NW corner of the south fueling
station.

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

                                                   PUBLICATION DATE:  03/19/1990
Station ID: 9751401                                SUPERCEDED DATE:   04/21/2003
Name:       SAINT CROIX, LIMETREE BAY                         
            VIRGIN ISLANDS
NOAA Chart: 25641                                  Latitude:         17° 41.8' N
USGS Quad:  CHRISTIANSTED                          Longitude:        64° 45.2' W


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


                         BENCH MARK STAMPING:  NO STAMPING 1

MONUMENTATION:           Survey Disk                               VM#:     1638
AGENCY:                                                            PID:         
SETTING CLASSIFICATION:  Concrete Pad


The bench mark is set flush in the concrete apron of a trailer jack pad on the
east side of the St. Croix Container Port pier, 135.2 feet (41.2 m) east of the
east end of curb on the south end of the pier, 81.3 feet (24.8 m) NW of the most
southern lightpole in the east row of lights, 30.8 feet (9.4 m) west of Port
Authoritys property fence on the east side, and 3.5 feet (1.1 m) NW of the SE
corner of the trailer jack pad.

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

                                                   PUBLICATION DATE:  03/19/1990
Station ID: 9751401                                SUPERCEDED DATE:   04/21/2003
Name:       SAINT CROIX, LIMETREE BAY                         
            VIRGIN ISLANDS
NOAA Chart: 25641                                  Latitude:         17° 41.8' N
USGS Quad:  CHRISTIANSTED                          Longitude:        64° 45.2' W


                            T I D A L   D A T U M S 


Tidal datums at SAINT CROIX, LIMETREE BAY based on:

     LENGTH OF SERIES:      57 MONTHS
     TIME PERIOD:           1984-1988
     TIDAL EPOCH:           1960-1978
     CONTROL TIDE STATION:  9759110 MAGUEYES ISLAND


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

     HIGHEST OBSERVED WATER LEVEL (11/07/1984)         =   1.57
     MEAN HIGHER HIGH WATER                     MHHW   =   0.75
     MEAN HIGH WATER                            MHW    =   0.74
     MEAN TIDE LEVEL                            MTL    =   0.38
     MEAN LOW WATER                             MLW    =   0.02
     MEAN LOWER LOW WATER                       MLLW   =   0.00
     LOWEST  OBSERVED WATER LEVEL (12/30/1986)         =  -0.64



Bench Mark Elevation Information                In FEET above:

     Stamping or Designation                    MLLW        MHW

     975 1401 M 1983                            10.68      9.94
     1401 B 1977                                14.73     13.99
     1401 C 1977                                15.11     14.37
     975 1401 H 1983                            15.03     14.29
     975 1401 J 1983                            10.70      9.96
     975 1401 K 1983                            10.66      9.92
     975 1401 L 1983                            10.19      9.45
     ELEV 11.505                                10.69      9.95
     NO STAMPING 1                              13.68     12.94


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

                                                   PUBLICATION DATE:  03/19/1990
Station ID: 9751401                                SUPERCEDED DATE:   04/21/2003
Name:       SAINT CROIX, LIMETREE BAY                         
            VIRGIN ISLANDS
NOAA Chart: 25641                                  Latitude:         17° 41.8' N
USGS Quad:  CHRISTIANSTED                          Longitude:        64° 45.2' 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.

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