U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
Datums Page                                                        Page  1 of 10

                                                                                
Station ID: 9751401                         PUBLICATION DATE:  09/26/2017
Name:       LIME TREE BAY, ST CROIX                           
            VI
NOAA Chart: 25641                           Latitude:   17° 41.7' N (  17.69472)
USGS Quad:  CHRISTIANSTED                   Longitude:  64° 45.2' W ( -64.75381)


To reach the tidal bench marks from the intersection of Highway 64 and Highway
66 at the airport, proceed east on Highway 66 for 2.3 km (1.4 mi) to a traffic
light at the corner of Havensa Oil Corporation; turn right and continue south
for 2.4 km (1.5 mi) to the entrance gate of St. Croix Container Port. Enter
through the gate, drive past the guard shack, and proceed straight through
another gate. The bench marks are on the pier and the adjacent pier. The tide
gauge is located 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 K 1983
                         DESIGNATION:          975 1401 K

MONUMENTATION:           Tidal Station disk                    VM#:         1634
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  DK7167
SETTING CLASSIFICATION:  Concrete footing                      OPUS PID:        
LATITUDE:   17° 41.8' N (  17.69664)          LONGITUDE:  64° 45.3' W ( -64.75469)


The bench mark is a disk set flush in the concrete footing of the eastern crane
rail track on St. Croix Container Port pier, 34.1 m (111.9 ft) NW of the fourth
light pole from the south in the west row of lights on the pier, 16.90 m (55.45
ft) east of the west face of the pier, 4.97 m (16.31 ft) SW of the NW corner of
the north fueling station, 4.60 m (15.09 ft) NW of the SW corner of the north
fueling station, and 0.61 m (2.0 ft) west of the east rail. Can no longer read
the stamping.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  2 of 10

                                                                                
Station ID: 9751401                         PUBLICATION DATE:  09/26/2017
Name:       LIME TREE BAY, ST CROIX                           
            VI
NOAA Chart: 25641                           Latitude:   17° 41.7' N (  17.69472)
USGS Quad:  CHRISTIANSTED                   Longitude:  64° 45.2' W ( -64.75381)


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


                         BENCH MARK STAMPING:  975 1401 J 1983
                         DESIGNATION:          975 1401 J

MONUMENTATION:           Tidal Station disk                    VM#:         1633
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  DK7166
SETTING CLASSIFICATION:  Concrete footing                      OPUS PID:        
LATITUDE:   17° 41.7' N (  17.69542)          LONGITUDE:  64° 45.2' W ( -64.75406)


The bench mark is a disk set flush in the concrete footing of the eastern crane
rail track on the St. Croix Container Port pier, 75.96 m (249.21 ft) north of
the south end of the pier, 16.82 m (55.18 ft) east of the west face of the pier,
5.03 m (16.5 ft) SW of the NW corner of the south fueling station, 4.51 m (14.8
ft) NW of the SW corner of the south fueling station, and 1.80 m (5.91 ft) west
of the west face of the fueling station.  Can no longer read the stamping.



                         BENCH MARK STAMPING:  975 1401 L 1983
                         DESIGNATION:          975 1401 L

MONUMENTATION:           Tidal Station disk                    VM#:         1635
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  DK7168
SETTING CLASSIFICATION:  Concrete pier deck                    OPUS PID:        
LATITUDE:   17° 41.8' N (  17.69719)          LONGITUDE:  64° 45.3' W ( -64.75522)


The bench mark is a disk set flush in the NW corner of the concrete St. Croix
Container Port pier, 1.37 m (4.49 ft) south of the NW corner of the pier, 1.07 m
(3.51 ft) west of the SW corner of the NW stop for an overhead crane, 0.98 m
(3.22 ft) north of the center of the most northern bollard on the west side of
the pier, and 0.46 m (1.51 ft) east of the west face of the pier.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  3 of 10

                                                                                
Station ID: 9751401                         PUBLICATION DATE:  09/26/2017
Name:       LIME TREE BAY, ST CROIX                           
            VI
NOAA Chart: 25641                           Latitude:   17° 41.7' N (  17.69472)
USGS Quad:  CHRISTIANSTED                   Longitude:  64° 45.2' W ( -64.75381)


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


                         BENCH MARK STAMPING:  975 1401 M 1983
                         DESIGNATION:          975 1401 M TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         1636
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  DK7165
SETTING CLASSIFICATION:  Concrete pier deck                    OPUS PID:        
LATITUDE:   17° 41.7' N (  17.69475)          LONGITUDE:  64° 45.2' W ( -64.75375)


The bench mark is a disk set flush at the southern end of the concrete St. Croix
Container Port pier, being flush with the ground, 16.46 m (54.0 ft) east of the
SW corner of the pier, 1.68 m (5.51 ft) NE of the NE corner of the NOS Tide
House, 0.82 m (2.69 ft) SW of the NW corner of the SE stop for an overhead
crane, and 0.58 m (1.9 ft) north of the south face of the pier.



                         BENCH MARK STAMPING:  ELEV 11.505
                         DESIGNATION:          975 1401 ELEV 11.505

MONUMENTATION:           Survey disk                           VM#:         1637
AGENCY:                  VI Port Authority                     IDB PID:         
SETTING CLASSIFICATION:  Concrete footing                      OPUS PID:        
LATITUDE:   17° 41.7' N (  17.69553)          LONGITUDE:  64° 45.3' W ( -64.75425)


The bench mark is a disk set flush in concrete along the eastern rail for a
crane on the St. Croix Container Port pier, 17.07 m (56.0 ft) east of the west
face of the pier, 15.24 m (50.0 ft) NNW of the NW corner of the south fueling
station, and 0.3 m (1 ft) east of the east rail.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  4 of 10

                                                                                
Station ID: 9751401                         PUBLICATION DATE:  09/26/2017
Name:       LIME TREE BAY, ST CROIX                           
            VI
NOAA Chart: 25641                           Latitude:   17° 41.7' N (  17.69472)
USGS Quad:  CHRISTIANSTED                   Longitude:  64° 45.2' W ( -64.75381)


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


                         BENCH MARK STAMPING:  1401 N 1997
                         DESIGNATION:          975 1401 N

MONUMENTATION:           Tidal Station disk                    VM#:        13766
AGENCY:                  National Ocean Service (NOS)          IDB PID:         
SETTING CLASSIFICATION:  Concrete manhole cover                OPUS PID:        
LATITUDE:   17° 41.9' N (  17.69789)          LONGITUDE:  64° 45.3' W ( -64.75517)


The bench mark is a disk set flush in a concrete manhole cover on the north side
of a 2.0 m x 2.0 m (6.6 ft x 6.6 ft) yellow dome-shaped concrete manhole, 48.89
m (160.4 ft) west of the east fence around the port property, 24.10 m (79.1 ft)
east of the east face of a 0.61 m (2.0 ft) high concrete wall around a power
panel box, 22.25 m (73.0 ft) north of the most northerly of 6 light poles that
run down the dock, and  and 0.3 m (1 ft) above the pavement.



                         BENCH MARK STAMPING:  1401 P 2008
                         DESIGNATION:          975 1401 P

MONUMENTATION:           Bench Mark disk                       VM#:        18679
AGENCY:                  National Ocean Service (NOS)          IDB PID:         
SETTING CLASSIFICATION:  Concrete parking strip                OPUS PID:        
LATITUDE:   17° 41.7' N (  17.69436)          LONGITUDE:  64° 45.2' W ( -64.75317)


The bench mark is a disk set in a concrete parking strip at the southern end of
the pier SE of the gage house, 28.82 m (94.55 ft) west of a chain link fence
running on the east side of the port property, 10.67 m (35.01 ft) east of the
west end of the concrete parking strip, and 0.30 m (0.98 ft) north of the south
end of the parking strip.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  5 of 10

                                                                                
Station ID: 9751401                         PUBLICATION DATE:  09/26/2017
Name:       LIME TREE BAY, ST CROIX                           
            VI
NOAA Chart: 25641                           Latitude:   17° 41.7' N (  17.69472)
USGS Quad:  CHRISTIANSTED                   Longitude:  64° 45.2' W ( -64.75381)


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


                         BENCH MARK STAMPING:  1401 Q 2008
                         DESIGNATION:          975 1401 Q

MONUMENTATION:           Bench Mark disk                       VM#:        18680
AGENCY:                  National Ocean Service (NOS)          IDB PID:         
SETTING CLASSIFICATION:  Concrete parking strip                OPUS PID:        
LATITUDE:   17° 41.6' N (  17.69381)          LONGITUDE:  64° 45.2' W ( -64.75286)


The bench mark is a disk set in the east end of a concrete parking strip located
at the South end of the container port property, 28.82 m (94.55 ft) west of the
chain link fence running on the east side of the port property, 10.69 m (35.07
ft) east of the west end of the parking strip and 0.30 m (0.98 ft) south of the
north side of the parking strip.



                         BENCH MARK STAMPING:  1401 R 2008
                         DESIGNATION:          975 1401 R

MONUMENTATION:           Bench Mark disk                       VM#:        18681
AGENCY:                  National Ocean Service (NOS)          IDB PID:         
SETTING CLASSIFICATION:  Cap of retaining wall                 OPUS PID:        
LATITUDE:   17° 41.6' N (  17.69258)          LONGITUDE:  64° 45.1' W ( -64.75203)


The bench mark is a disk set in a concrete cap of a retaining wall located at
the southern-most end of the container port property, 38.92 m (127.69 ft) east
of a concrete cap running along the west side of the pier, 8.19 m (26.87 ft)
west of a chain link fence running along the east side of the property, and 0.33
m (1.08 ft) North of the South end of the concrete cap.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  6 of 10

                                                                                
Station ID: 9751401                         PUBLICATION DATE:  09/26/2017
Name:       LIME TREE BAY, ST CROIX                           
            VI
NOAA Chart: 25641                           Latitude:   17° 41.7' N (  17.69472)
USGS Quad:  CHRISTIANSTED                   Longitude:  64° 45.2' W ( -64.75381)


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


                         BENCH MARK STAMPING:  1401 S 2014
                         DESIGNATION:          975 1401 S

MONUMENTATION:           Tidal Station disk                    VM#:        21250
AGENCY:                  National Ocean Service (NOS)          IDB PID:         
SETTING CLASSIFICATION:  Concrete storm drain                  OPUS PID:        
LATITUDE:   17° 42.0' N (  17.70044)          LONGITUDE:  64° 45.4' W ( -64.75633)


The bench mark is set in the southwest corner of a 1.7 m (5.6 ft) x 1.7 m (5.6
ft) concrete storm drain, 65.38 m (214.5 ft) southwest of the southwest corner
of main warehouse building, 30.92 m (101.4 ft) south of the fourth light pole,
7.31 m (24.0 ft) east of a chain link fence on the west border of property, 2.65
m (8.7 ft) north of third light pole, 0.15 m (0.5 ft) above road surface, being
the high point of a standard brass NOS survey disc.



                         BENCH MARK STAMPING:  1401 T 2016
                         DESIGNATION:          975 1401 T

MONUMENTATION:           Metal Rod                             VM#:        21900
AGENCY:                  National Ocean Service (NOS)          IDB PID:         
SETTING CLASSIFICATION:  Stainless Steel Rod                   OPUS PID:        
LATITUDE:   17° 42.0' N (  17.69939)          LONGITUDE:  64° 45.4' W ( -64.75611)


The bench mark is a stainless steel rod located just outside the NW entrance
gate, 18.95 m (62.2 ft) S of the center line of cross Lagoon Road, 10.4 m (34.1
ft) WNW of the centerline of an entrance gate on the NWcorner of the St Croix
container port property, being the highest point on top of a stainless steel rod
driven to a depth of 14.38 m (47.2 ft) with 5-inch pvc pipe and aluminum access
cover surrounded by a concrete kick block.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  7 of 10

                                                                                
Station ID: 9751401                         PUBLICATION DATE:  09/26/2017
Name:       LIME TREE BAY, ST CROIX                           
            VI
NOAA Chart: 25641                           Latitude:   17° 41.7' N (  17.69472)
USGS Quad:  CHRISTIANSTED                   Longitude:  64° 45.2' W ( -64.75381)


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


                         BENCH MARK STAMPING:  1401 U 2017
                         DESIGNATION:          975 1401 U

MONUMENTATION:           Flange-encased Rod                    VM#:        22267
AGENCY:                  National Ocean Service (NOS)          IDB PID:         
SETTING CLASSIFICATION:                                        OPUS PID:        
LATITUDE:   17° 42.0' N (  17.69997)          LONGITUDE:  64° 45.3' W ( -64.75458)


The bench mark is a stainless steel rod located near the entrance gate of the
St. Croix container port, located 36.2 m (118.8 ft) north of a concrete pole
with a camera mounted at the top, 1.9 m (6.2 ft) east of a 41 cm (16 in)
retaining wall, and 0.9 m (3.0 ft) west of a chain link fence. The steel rod is
driven to a depth of 17.0 m (55.8 ft) into the ground and surrounded by a 5 inch
pvc-pipe and concrete kick block.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  8 of 10

                                                                                
Station ID: 9751401                         PUBLICATION DATE:  09/26/2017
Name:       LIME TREE BAY, ST CROIX                           
            VI
NOAA Chart: 25641                           Latitude:   17° 41.7' N (  17.69472)
USGS Quad:  CHRISTIANSTED                   Longitude:  64° 45.2' W ( -64.75381)


                            T I D A L   D A T U M S 


Tidal datums at LIME TREE BAY, ST CROIX based on:

     LENGTH OF SERIES:      18 YEARS
     TIME PERIOD:           January 1984 - 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 (11/17/1999)         =  0.788
     MEAN HIGHER HIGH WATER                     MHHW   =  0.216
     MEAN HIGH WATER                            MHW    =  0.214
     MEAN SEA LEVEL                             MSL    =  0.112
     Virgin Islands Vertical Datum of 2009      VIVD09 =  0.112
     MEAN TIDE LEVEL                            MTL    =  0.109
     MEAN LOW WATER                             MLW    =  0.004
     MEAN LOWER LOW WATER                       MLLW   =  0.000
     LOWEST  OBSERVED WATER LEVEL (05/26/1990)         = -0.233



Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     975 1401 K 1983                             3.213    2.999
     975 1401 J 1983                             3.227    3.013
     975 1401 L 1983                             3.071    2.857
     975 1401 M 1983                             3.223    3.009
     ELEV 11.505                                 3.223    3.009
     1401 N 1997                                 4.263    4.049
     1401 P 2008                                 4.496    4.282
     1401 Q 2008                                 4.492    4.277
     1401 R 2008                                 4.595    4.381
     1401 S 2014                                 6.640    6.426
     1401 T 2016                                 5.271    5.057
     1401 U 2017                                 6.082    5.868


                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  9 of 10

                                                                                
Station ID: 9751401                         PUBLICATION DATE:  09/26/2017
Name:       LIME TREE BAY, ST CROIX                           
            VI
NOAA Chart: 25641                           Latitude:   17° 41.7' N (  17.69472)
USGS Quad:  CHRISTIANSTED                   Longitude:  64° 45.2' W ( -64.75381)


Foot Notes:

Bench mark 1401 U 2017 is 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 this mark.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page 10 of 10

                                                                                
Station ID: 9751401                         PUBLICATION DATE:  09/26/2017
Name:       LIME TREE BAY, ST CROIX                           
            VI
NOAA Chart: 25641                           Latitude:   17° 41.7' N (  17.69472)
USGS Quad:  CHRISTIANSTED                   Longitude:  64° 45.2' W ( -64.75381)


                             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 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 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.