U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 1 of 8
Station ID: 1770000 PUBLICATION DATE: 04/21/2003
Name: PAGO PAGO, AMERICAN SAMOA
NOAA Chart: 83484 Latitude: 14ø 16.8' S
USGS Quad: TUTUILA ISLAND Longitude: 170ø 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 buillding 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:
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
Station ID: 1770000 PUBLICATION DATE: 04/21/2003
Name: PAGO PAGO, AMERICAN SAMOA
NOAA Chart: 83484 Latitude: 14ø 16.8' S
USGS Quad: TUTUILA ISLAND Longitude: 170ø 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: US Coast and Geodetic Survey (USC&GS) PID:
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
Station ID: 1770000 PUBLICATION DATE: 04/21/2003
Name: PAGO PAGO, AMERICAN SAMOA
NOAA Chart: 83484 Latitude: 14ø 16.8' S
USGS Quad: TUTUILA ISLAND Longitude: 170ø 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 (160ø) 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:
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
Station ID: 1770000 PUBLICATION DATE: 04/21/2003
Name: PAGO PAGO, AMERICAN SAMOA
NOAA Chart: 83484 Latitude: 14ø 16.8' S
USGS Quad: TUTUILA ISLAND Longitude: 170ø 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:
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 110ø magnetic) to a green phone utility box, 9.69
m (31.8 ft) SW (bearing 110ø 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:
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
Station ID: 1770000 PUBLICATION DATE: 04/21/2003
Name: PAGO PAGO, AMERICAN SAMOA
NOAA Chart: 83484 Latitude: 14ø 16.8' S
USGS Quad: TUTUILA ISLAND Longitude: 170ø 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:
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:
SETTING CLASSIFICATION: Concrete sea wall
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
Station ID: 1770000 PUBLICATION DATE: 04/21/2003
Name: PAGO PAGO, AMERICAN SAMOA
NOAA Chart: 83484 Latitude: 14ø 16.8' S
USGS Quad: TUTUILA ISLAND Longitude: 170ø 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:
SETTING CLASSIFICATION: Concrete sea wall
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
Station ID: 1770000 PUBLICATION DATE: 04/21/2003
Name: PAGO PAGO, AMERICAN SAMOA
NOAA Chart: 83484 Latitude: 14ø 16.8' S
USGS Quad: TUTUILA ISLAND Longitude: 170ø 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: 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 (09/04/1960) = 1.250
MEAN HIGHER HIGH WATER (MHHW) = 0.827
MEAN HIGH WATER (MHW) = 0.783
MEAN TIDE LEVEL (MTL) = 0.401
MEAN SEA LEVEL (MSL) = 0.401
MEAN LOW WATER (MLW) = 0.018
MEAN LOWER LOW WATER (MLLW) = 0.000
LOWEST OBSERVED WATER LEVEL (02/06/1966) = -0.518
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
0000 S 1993 1.765 0.982
NO 10 1963 2.463 1.680
0000 M 1983 3.252 2.469
0000 N 1983 3.509 2.725
0000 P 1987 2.719 1.935
0000 Q 1991 4.772 3.989
0000 R 1993 2.427 1.643
0000 T 1993 2.803 2.020
0000 U 1993 2.062 1.278
0000 V 1993 1.924 1.141
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 8 of 8
Station ID: 1770000 PUBLICATION DATE: 04/21/2003
Name: PAGO PAGO, AMERICAN SAMOA
NOAA Chart: 83484 Latitude: 14ø 16.8' S
USGS Quad: TUTUILA ISLAND Longitude: 170ø 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 the fixed datums of North American Vertical Datum of 1988 (NAVD 88).
NGVD 29 is a fixed datum adopted as a national standard geodetic reference for
heights but is now considered superseded. NGVD 29 is sometimes referred to as
Sea Level Datum of 1929 or as Mean Sea Level on some early issues of Geological
Survey Topographic Quads. NGVD 29 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 NGVD 29 are available from the National
Geodetic Survey (NGS) data base via the World Wide Web at
National Geodetic Survey.
NAVD 88 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. NAVD 88 replaces NGVD 29 as the national
standard geodetic reference for heights. Bench mark elevations relative to
NAVD 88 are available from NGS through the World Wide Web at
National Geodetic Survey.
NGVD 29 and NAVD 88 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 NAVD 88 elevation is shown on the Elevations of Tidal Datums Table Referred
to MLLW only when two or more of the bench marks listed have NAVD 88 elevations.
The NAVD 88 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, NAVD 88 bench mark elevations computed indirectly from the tidal
datums elevation table may differ slightly from NAVD 88 elevations listed for
each bench mark in the NGS database.