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Administration National Ocean Service Datums Page Page 1 of 8 PUBLICATION DATE: 11/22/2002 Station ID: 1770000 SUPERCEDED DATE: 04/21/2003 Name: PAGO PAGO, AMERICAN SAMOA NOAA Chart: 83484 Latitude: 14° 16.8' S USGS Quad: TUTUILA ISLAND Longitude: 170° 41.4' W To reach the tidal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and Atmospheric Administration National Ocean Service Page 2 of 8 PUBLICATION DATE: 11/22/2002 Station ID: 1770000 SUPERCEDED DATE: 04/21/2003 Name: PAGO PAGO, AMERICAN SAMOA NOAA Chart: 83484 Latitude: 14° 16.8' S USGS Quad: TUTUILA ISLAND Longitude: 170° 41.4' W T I D A L B E N C H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.