Superseded Bench Mark Sheet for 1770000, Pago Pago, American Samoa

Present Epoch

Printable version

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
Datums Page                                                        Page  1 of  8

                                                   PUBLICATION DATE:  11/22/2002
Station ID: 1770000                                SUPERCEDED DATE:   04/21/2003
Name:       PAGO PAGO, AMERICAN SAMOA                         
NOAA Chart: 83484                                  Latitude:         14° 16.8' S
USGS Quad:  TUTUILA ISLAND                         Longitude:       170° 41.4' W


To reach the tidal bench marks, from Pago Pago Airport proceed 0.3 km (0.2 mi)
from the parking lot and turn right onto the Airport Road (look for the U.S.
Army Reserve Building at intersection) and proceed 2.1 km (1.3 mi) on Airport
Road to the T intersection where the Airport and Main Roads intersect, turn
right onto the Main Road and proceed 10.6 km (6.6 mi), take a right at the first
intersection past the Fagatogo Shopping complex which will be on your right. 
Proceed one block and take a left onto the waterfront street, then proceed west
for 1/2 block and on your right will be the two storied, constructed of gray
stone with a cinder block wall, Department of Marine & Wildlife Resource (DMWR)
building, located across the street and north of the public outdoor market and
bus stop.  The bench marks were located in the vicinity all along the harbor. 
The Tide Gauge is located in a storage closet (with outside entrance) in the NE
corner of the DMWR building on the first level.


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


                 PRIMARY BENCH MARK STAMPING:  0000 S 1993
                         DESIGNATION:          177 0000 S

MONUMENTATION:           Tidal Station disk                        VM#:    12710
AGENCY:                  National Ocean Service (NOS)              PID#:  DE8786
SETTING CLASSIFICATION:  Concrete retaining wall


The primary bench mark is a disk set in the west concrete retaining wall of a
drainage ditch which is located east of the Fagatoga Square shopping complex,
0.19 km (0.12 mi) due east of bench mark 0000 R 1993 along the north side of the
road which runs along the waterfront, 33.90 m (111.2 ft) NE of the NE corner of
the Fagatoga Square shopping complex, 11.60 m (38.1 ft) west of the first
utility pole east of the drainage ditch, 3.80 m (12.5 ft) south of the north end
of the drainage ditch, and 0.30 m (1.0 ft) east of the hand rail of the overpass
which crosses the drainage ditch.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  2 of  8

                                                   PUBLICATION DATE:  11/22/2002
Station ID: 1770000                                SUPERCEDED DATE:   04/21/2003
Name:       PAGO PAGO, AMERICAN SAMOA                         
NOAA Chart: 83484                                  Latitude:         14° 16.8' S
USGS Quad:  TUTUILA ISLAND                         Longitude:       170° 41.4' W


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


                         BENCH MARK STAMPING:  NO 10 1963
                         DESIGNATION:          177 0000 TIDAL 10

MONUMENTATION:           Tidal Station disk                        VM#:       94
AGENCY:                  U. S. Coast & Geodetic Survey
                         (USC&GS)                                     PID#:  DE8785
SETTING CLASSIFICATION:  Concrete bulkhead


The bench mark is a disk set flush in top of a 0.37 m (1.2 ft) wide NW-SE
concrete bulkhead located inside the Department of Port Administration compound,
21.64 m (71.0 ft) south of the NW corner of the wharf, 13.72 m (45.0 ft) west of
the NW corner of a reinforced concrete warehouse, 1.62 m (5.3 ft) NNE from a
yellow fire hydrant, and 0.52 m (1.7 ft) north of the south end of the bulkhead.



                         BENCH MARK STAMPING:  0000 M 1983
                         DESIGNATION:          177 0000 M

MONUMENTATION:           Tidal Station disk                        VM#:       99
AGENCY:                  National Ocean Service (NOS)              PID:         
SETTING CLASSIFICATION:  Bedrock outcrop


The bench mark is a disk set in a bedrock outcropping at the southern-most
corner of the wall surrounding the Governor's Estate,  121.31 m (398.0 ft) SW of
the flagpole at the main entrance of the Pago Pago Rainmaker Hotel, 15.79 m
(51.8 ft) NW of Lt. Governor's Residence sign, 11.25 m (36.9 ft) NNE of a
telephone pole inside the Lt. Governor's residence grounds, 10.97 m (36.0 ft) SW
of the manhole on the south side of the Main Road divider directly in front of
the Rainmaker driveway, 1.49 m (4.9 ft) west of the western-most corner of three
concrete benches, 0.70 (2.3 ft) west of north end of cyclone fence, and 0.76 m
(2.5 ft) above the sidewalk. 

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  3 of  8

                                                   PUBLICATION DATE:  11/22/2002
Station ID: 1770000                                SUPERCEDED DATE:   04/21/2003
Name:       PAGO PAGO, AMERICAN SAMOA                         
NOAA Chart: 83484                                  Latitude:         14° 16.8' S
USGS Quad:  TUTUILA ISLAND                         Longitude:       170° 41.4' W


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


                         BENCH MARK STAMPING:  0000 N 1983
                         DESIGNATION:          177 0000 N

MONUMENTATION:           Tidal Station disk                        VM#:      100
AGENCY:                  National Ocean Service (NOS)              PID:         
SETTING CLASSIFICATION:  Rock outcrop


The bench mark is a disk set on the SE side of the Main Road in a bedrock
outcropping at the northern base of the mountain on which the Governor's house
is located, 34.44 m (113.0 ft) SSE (160 ) of the Feleti Public Library's south
entrance, 17.80 m (58.4 ft) SE of a red fireplug surrounded by four 1 m (3 ft)
high metal posts, 9.24 m (30.3 ft) SE of the centerline of the Main Road, and
2.59 m (8.5 ft) east of an orange witness post, and 1.37 m (4.5 ft) above road
level.



                         BENCH MARK STAMPING:  0000 P 1987
                         DESIGNATION:          177 0000 P

MONUMENTATION:           Tidal Station disk                        VM#:     1480
AGENCY:                  National Ocean Service (NOS)              PID#:  DE8784
SETTING CLASSIFICATION:  Concrete foundation


The bench mark is a disk set in the SE corner of the concrete foundation of the
Department of Port Administration Building, 35.97 m (118.0 ft) north of the west
end of the gate fence post, 14.39 m (47.2 ft) east of the stairway up to the
Port Director's office, 6.89 m (22.6 ft) from the southern-most corner of a
metal shed on the east side of the building, 0.18 m (0.6 ft) SE of the SE corner
of the building, and 0.15 m (0.5 ft) west from the east edge of the concrete
foundation. 

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  4 of  8

                                                   PUBLICATION DATE:  11/22/2002
Station ID: 1770000                                SUPERCEDED DATE:   04/21/2003
Name:       PAGO PAGO, AMERICAN SAMOA                         
NOAA Chart: 83484                                  Latitude:         14° 16.8' S
USGS Quad:  TUTUILA ISLAND                         Longitude:       170° 41.4' W


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


                         BENCH MARK STAMPING:  0000 Q 1991
                         DESIGNATION:          177 0000 Q

MONUMENTATION:           Tidal Station disk                        VM#:     1481
AGENCY:                  National Ocean Service (NOS)              PID#:  DE8783
SETTING CLASSIFICATION:  Rock outcrop


The bench mark is a disk set in a bedrock outcropping at the northern base of
the mountain behind Wesley Book Shop, 31.70 m (104.0 ft) south of the main road,
11.95 m (39.2 ft) NE (bearing 110  magnetic) to a green phone utility box, 9.69
m (31.8 ft) SW (bearing 110  magnetic) to the western-most pillar supporting a
stairway, 9.24 m (30.3 ft) south of the southeastern corner of Wesley Book Shop,
3.87 m (12.7 ft) south of the south side of a 1 m (2 ft) high cement wall, 0.09
m (0.3 ft) north of a vertical rock wall, and 0.91 m (3.0 ft) above ground
level.



                         BENCH MARK STAMPING:  0000 R 1993
                         DESIGNATION:          177 0000 R

MONUMENTATION:           Tidal Station disk                        VM#:    12712
AGENCY:                  National Ocean Service (NOS)              PID#:  DE8783
SETTING CLASSIFICATION:  Concrete stairway


The bench mark is a disk set flush in the concrete stairway in the SE corner of
the Department of Marine & Wildlife Resource building, 8.02 m (26.3 ft) NW of
the SE corner of the cinder block fence wall which surrounds the building, and
4.27 m (14.0 ft) due north of the south wall, and 0.36 m (1.2 ft) above ground
level on the second step adjacent to the building.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  5 of  8

                                                   PUBLICATION DATE:  11/22/2002
Station ID: 1770000                                SUPERCEDED DATE:   04/21/2003
Name:       PAGO PAGO, AMERICAN SAMOA                         
NOAA Chart: 83484                                  Latitude:         14° 16.8' S
USGS Quad:  TUTUILA ISLAND                         Longitude:       170° 41.4' W


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


                         BENCH MARK STAMPING:  0000 T 1993
                         DESIGNATION:          177 0000 T

MONUMENTATION:           Tidal Station disk                        VM#:    12713
AGENCY:                  National Ocean Service (NOS)              PID#:  DE8790
SETTING CLASSIFICATION:  Concrete bench


The bench mark is a disk set flush at the north side of the outside of a
circular concrete public bench that has a radius of 7.27 m (23.9 ft), located on
the north side of the main road directly across the street from the U.S. Post
Office and west of the Jean P. Haydon museum, 11.52 m (37.8 ft) NW of a red fire
hydrant, 0.34 m (1.1 ft) north of the south end of the bench, and 0.46 m (1.5
ft) above ground level.



                         BENCH MARK STAMPING:  0000 U 1993
                         DESIGNATION:          177 0000 U

MONUMENTATION:           Tidal Station disk                        VM#:    12714
AGENCY:                  National Ocean Service (NOS)              PID#:  DE8788
SETTING CLASSIFICATION:  Concrete seawall


The bench mark is a disk set on top of a concrete seawall, in the corner where
the northward facing seawall and westward facing seawall meet, 0.12 km (0.07 mi)
west of bench mark 0000 R 1993 along the north side of the road that runs along
the waterfront, 13.55 m (44.5 ft) NW of the NW corner of the Phil & Sons
Construction Company, Inc., office building, 5.49 m (18.0 ft) north of the
centerline of the road which runs along the waterfront, 0.93 m (3.1 ft) south of
the east entrance to the floating dock marina, 0.34 m (1.1 ft) east of cyclone
fence which surrounds the floating dock marina, and 0.15 m (0.5 ft) above street
level.      

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  6 of  8

                                                   PUBLICATION DATE:  11/22/2002
Station ID: 1770000                                SUPERCEDED DATE:   04/21/2003
Name:       PAGO PAGO, AMERICAN SAMOA                         
NOAA Chart: 83484                                  Latitude:         14° 16.8' S
USGS Quad:  TUTUILA ISLAND                         Longitude:       170° 41.4' W


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


                         BENCH MARK STAMPING:  0000 V 1993
                         DESIGNATION:          177 0000 V

MONUMENTATION:           Tidal Station disk                        VM#:    12715
AGENCY:                  National Ocean Service (NOS)              PID#:  DE8791
SETTING CLASSIFICATION:  Concrete seawall


The bench mark is a disk set flush in a concrete seawall south of a breakwater
for yacht moorage and north of the Langkilde Service Station, on the north side
of the street running along the waterfront, 0.17 km (0.11 mi) west of bench mark
0000 U 1993, 14.20 m (46.6 ft) NNE of the NE-most filling pump of the service
station, 0.91 m (3.0 ft) north of a "ONE-WAY" street sign, 0.76 m (2.5 ft) south
of the seawall's water edge, 0.25 m (0.8 ft) south of the cyclone fence running
along the waterfront, and 0.2 m (0.7 ft) above stret level.  

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  7 of  8

                                                   PUBLICATION DATE:  11/22/2002
Station ID: 1770000                                SUPERCEDED DATE:   04/21/2003
Name:       PAGO PAGO, AMERICAN SAMOA                         
NOAA Chart: 83484                                  Latitude:         14° 16.8' S
USGS Quad:  TUTUILA ISLAND                         Longitude:       170° 41.4' W


                            T I D A L   D A T U M S 


Tidal datums at PAGO PAGO, AMERICAN SAMOA based on:

     LENGTH OF SERIES:      18 YEARS
     TIME PERIOD:           January 1960 - December 1977
     TIDAL EPOCH:           1960-1978
     CONTROL TIDE STATION:   


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

     HIGHEST OBSERVED WATER LEVEL (07/12/1995)         =  1.219
     MEAN HIGHER HIGH WATER                     MHHW   =  0.838
     MEAN HIGH WATER                            MHW    =  0.796
     MEAN TIDE LEVEL                            MTL    =  0.408
     MEAN SEA LEVEL                             MSL    =  0.408
     MEAN LOW WATER                             MLW    =  0.018
     MEAN LOWER LOW WATER                       MLLW   =  0.000
     LOWEST  OBSERVED WATER LEVEL (02/06/1966)         = -0.485



Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     0000 S 1993                                 1.798    1.003
     NO 10 1963                                  2.496    1.701
     0000 M 1983                                 3.285    2.489
     0000 N 1983                                 3.542    2.746
     0000 P 1987                                 2.752    1.956
     0000 Q 1991                                 4.805    4.010
     0000 R 1993                                 2.460    1.664
     0000 T 1993                                 2.836    2.041
     0000 U 1993                                 2.095    1.299
     0000 V 1993                                 1.957    1.162


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

                                                   PUBLICATION DATE:  11/22/2002
Station ID: 1770000                                SUPERCEDED DATE:   04/21/2003
Name:       PAGO PAGO, AMERICAN SAMOA                         
NOAA Chart: 83484                                  Latitude:         14° 16.8' S
USGS Quad:  TUTUILA ISLAND                         Longitude:       170° 41.4' 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 (ASVD02).  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.

American Samoa Vertical Datum of 2002 (ASVD02) 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 station 1770000 at Pago Pago Harbor, American
Samoa was held fixed as the single initial constraint.  ASVD02 replaces all
previous height system as the national standard geodetic reference for heights
on Tutuila Island, American Samoa.  Bench mark elevations relative to ASVD02
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 ASVD02 elevation is shown on the Elevations of Tidal Datums Table Referred
to MLLW only when two or more of the bench marks listed have ASVD02 elevations.
The ASVD02 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, ASVD02 bench mark elevations computed indirectly from the tidal
datums elevation table may differ slightly from ASVD02 elevations listed for
each bench mark in the NGS database.

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