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Datums Page Page 1 of 9
Station ID: 1612340 PUBLICATION DATE: 12/12/2003
Name: HONOLULU, HONOLULU HARBOR, OAHU ISLAND
HI
NOAA Chart: 19367 Latitude: 21° 18.4' N ( 21.30670)
USGS Quad: HONOLULU Longitude: 157° 52.0' W (-157.86700)
To reach the tidal bench marks, from Honolulu International Airport take the
Nimitz Highway (Route 92) east approximately 8 km (5 mi) to Pier 4, the 14th
U.S. Coast Guard District. Nimitz Highway turns into Ala Moana Road
approximately three-fourths of the way to the tide station. The tide station is
in a concrete block building at the end of Pier 4, and the bench marks are
around building and in the vicinity.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: B.M. ELV. 8.06 FEET
DESIGNATION: 161 2340 BM 8
MONUMENTATION: Bench Mark disk VM#: 23
AGENCY: US Geological Survey (USGS) IDB PID#: TU0286
SETTING CLASSIFICATION: Concrete bulkhead OPUS PID:
LATITUDE: 21° 18.3' N ( 21.30519) LONGITUDE: 157° 51.8' W (-157.86397)
The primary bench mark is a disk set in top of the SE end of the concrete
bulkhead on the SW side of Ala Moana Boulevard, across from the Hawaiian
Electric Company's Leslie A. Hicks Power Plant, at the NE end of the waterway
between Pier 7 and Pier 6, about 1 m (2 ft) NW of the SE end of the bulkhead,
and 1 m (2 ft) above the sidewalk.
BENCH MARK STAMPING:
DESIGNATION: 161 2340 TIDAL 2
ALIAS: 2 1872
MONUMENTATION: See descriptive text VM#: 22
AGENCY: Hawaiian Government Survey Department IDB PID#: TU0283
SETTING CLASSIFICATION: Stone pilaster base OPUS PID:
LATITUDE: 21° 18.3' N ( 21.30553) LONGITUDE: 157° 51.6' W (-157.85983)
The bench mark is the flat concrete horizontal surface at the foot of the first
pilaster on the SE side of the entrance to the State of Hawaii Judiciary
Building (Aliiolani Hale) at the south corner of the intersection of King and
Mililani Streets, and 1.37 m (4.5 feet) above the entrance floor of the
building.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 9
Station ID: 1612340 PUBLICATION DATE: 12/12/2003
Name: HONOLULU, HONOLULU HARBOR, OAHU ISLAND
HI
NOAA Chart: 19367 Latitude: 21° 18.4' N ( 21.30670)
USGS Quad: HONOLULU Longitude: 157° 52.0' W (-157.86700)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: NO 11 1925
DESIGNATION: 161 2340 TIDAL 11
MONUMENTATION: Tidal Station disk VM#: 25
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: TU0284
SETTING CLASSIFICATION: Concrete foundation OPUS PID:
LATITUDE: 21° 18.3' N ( 21.30575) LONGITUDE: 157° 51.8' W (-157.86389)
The bench mark is a disk set vertically in the south corner of the concrete
foundation of the northern one of two power company plants on Ala Moana
Boulevard, 11 m (36 ft) NW of the centerline of the gate entrance between the
two plant buildings, and 0.06 m (0.2 ft) above the end of the curved concrete
curb.
BENCH MARK STAMPING: NO 12 1925
DESIGNATION: 161 2340 TIDAL 12
MONUMENTATION: Tidal Station disk VM#: 26
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: TU0288
SETTING CLASSIFICATION: Concrete floor OPUS PID:
LATITUDE: 21° 18.4' N ( 21.30631) LONGITUDE: 157° 51.6' W (-157.86036)
The bench mark is a disk set in the floor of Federal Office Building on the
Merchant Street (NE) side, at the middle of the center one of nine arches, 0.30
m (1.0 ft) SW from edge of floor, and directly under the word "Custom" of the
inscription United States Post Office, Custom House and Court House.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 9
Station ID: 1612340 PUBLICATION DATE: 12/12/2003
Name: HONOLULU, HONOLULU HARBOR, OAHU ISLAND
HI
NOAA Chart: 19367 Latitude: 21° 18.4' N ( 21.30670)
USGS Quad: HONOLULU Longitude: 157° 52.0' W (-157.86700)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: NO 13 1925
DESIGNATION: 161 2340 TIDAL 13
MONUMENTATION: Tidal Station disk VM#: 27
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: TU0290
SETTING CLASSIFICATION: Concrete floor OPUS PID:
LATITUDE: 21° 18.3' N ( 21.30569) LONGITUDE: 157° 51.5' W (-157.85792)
The bench mark is a disk set in the floor of the Library of Hawaii at the King
Street entrance, about 0.10 m (0.3 ft) SW of the most NW of eight concrete
pillars, and on range with the outside of the wall running NW.
BENCH MARK STAMPING: NO 14 1925
DESIGNATION: 161 2340 TIDAL 14
MONUMENTATION: Tidal Station disk VM#: 28
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: TU0289
SETTING CLASSIFICATION: Concrete balustrade OPUS PID:
LATITUDE: 21° 18.4' N ( 21.30681) LONGITUDE: 157° 51.5' W (-157.85903)
The bench mark is a disk set in top of the concrete bannister wall on the NW
side of the King Street entrance to Iolani Palace, at the NE side of a light
fixture, and 0.6 m (2 ft) above the sidewalk.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 9
Station ID: 1612340 PUBLICATION DATE: 12/12/2003
Name: HONOLULU, HONOLULU HARBOR, OAHU ISLAND
HI
NOAA Chart: 19367 Latitude: 21° 18.4' N ( 21.30670)
USGS Quad: HONOLULU Longitude: 157° 52.0' W (-157.86700)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: NO 20 1960
DESIGNATION: 161 2340 TIDAL 20
MONUMENTATION: Tidal Station disk VM#: 29
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: TU0292
SETTING CLASSIFICATION: Concrete pier OPUS PID:
LATITUDE: 21° 18.2' N ( 21.30333) LONGITUDE: 157° 51.9' W (-157.86467)
The bench mark is a disk set in the NW corner of the concrete deck of Pier 4, 1
m (4 ft) south of the north face of the pier, and 0.30 m (1.0 ft) east of the
west end of the pier.
BENCH MARK STAMPING: NO 21 1964
DESIGNATION: 161 2340 TIDAL 21
MONUMENTATION: Tidal Station disk VM#: 30
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: TU0291
SETTING CLASSIFICATION: Concrete bulkhead OPUS PID:
LATITUDE: 21° 18.2' N ( 21.30383) LONGITUDE: 157° 51.8' W (-157.86367)
The bench mark is a disk set in top of concrete bulkhead on the west side of Ala
Moana Boulevard at the east end of the waterway between Pier 4 and Pier 5A, 42 m
(139 ft) north of the face of Pier 4, 0.61 m (2.0 ft) south of the junction of
the concrete block wall and concrete bulkhead, and 0.61 m (2.0 ft) above the
sidewalk.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 9
Station ID: 1612340 PUBLICATION DATE: 12/12/2003
Name: HONOLULU, HONOLULU HARBOR, OAHU ISLAND
HI
NOAA Chart: 19367 Latitude: 21° 18.4' N ( 21.30670)
USGS Quad: HONOLULU Longitude: 157° 52.0' W (-157.86700)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: GSL 2340 1987
DESIGNATION: HONOLULU GSL 2340
MONUMENTATION: Bench Mark disk VM#: 37
AGENCY: National Geodetic Survey (NGS) IDB PID#: AA3576
SETTING CLASSIFICATION: Concrete pier OPUS PID#: AA3576
LATITUDE: 21° 18.2' N ( 21.30392) LONGITUDE: 157° 51.8' W (-157.86289)
The bench mark is a disk set flush with concrete pier, 19.78 m (64.9 ft) west
from the NW corner of USCG Marine Safety Office building, and 8.66 m (28.4 ft)
NNE of the NE corner of a concrete block tide house.
BENCH MARK STAMPING: 2340 A 1983
DESIGNATION: 161 2340 A
MONUMENTATION: Tidal Station disk VM#: 38
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Stainless steel rod OPUS PID:
LATITUDE: 21° 18.3' N ( 21.30458) LONGITUDE: 157° 51.8' W (-157.86342)
The bench mark is a disk set in the south side of a park that is located south
of the Honolulu City Light Power Plant, 102 m (335 ft) NE of bench mark NO 21
1964, 31.30 m (102.7 ft) west from the west edge of the western sidewalk along
Ala Moana Boulevard, 13 m (42 ft) north of a 2 m (5 ft) diameter tree, 9.45 m
(31.0 ft) north of the north edge of a park bench that faces west, and 1.98 m
(6.5 ft) east of the east edge of sidwalk. The bench mark is set 12 cm (0.4 ft)
below ground level, crimped to the top of a 9/16-inch stainless steel rod driven
to a depth of 15.8 m (52 ft), and protected by a 4 in PVC pipe with screw cap
cover.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 9
Station ID: 1612340 PUBLICATION DATE: 12/12/2003
Name: HONOLULU, HONOLULU HARBOR, OAHU ISLAND
HI
NOAA Chart: 19367 Latitude: 21° 18.4' N ( 21.30670)
USGS Quad: HONOLULU Longitude: 157° 52.0' W (-157.86700)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 2340 B 1983
DESIGNATION: 161 2340 B
MONUMENTATION: Tidal Station disk VM#: 39
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete foundation OPUS PID:
LATITUDE: 21° 18.4' N ( 21.30670) LONGITUDE: 157° 52.0' W (-157.86700)
The bench mark is a disk set in the concrete foundation of the prince Jonah
Kuhio Kalanianaole Federal building located at 300 Ala Mona Boulevard, on the
east side of steps on the first landing at the main north entrance of building,
14.08 m (46.2 ft) SE from a flagpole, 11.28 m (37.0 ft) east of a plaque
entitled United States of America Gerald R. Ford President, 1.62 m (5.3 ft) west
of a concrete wall that surrounds the building marked United States Court House,
0.49 m (1.6 ft) SE of a handrail, and 0.15 m (0.5 ft) north of the red brick
that forms the first of two landings that leads to the building.
BENCH MARK STAMPING: 2340 C 1983
DESIGNATION: 161 2340 C
MONUMENTATION: Tidal Station disk VM#: 40
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Stainless steel rod OPUS PID:
LATITUDE: 21° 18.3' N ( 21.30542) LONGITUDE: 157° 51.6' W (-157.86061)
The bench mark is a disk set near the south corner of the old Federal Building
at the intersection of Queen and Mililani Streets, 17.1 m (56.0 ft) NW from the
centerline of Mililani Street, 14.11 m (46.3 ft) NE from the south corner of the
old Federal building, 0.49 m (1.6 ft) NE from an orange NOS witness post sign,
and 0.27 m (0.9 ft) SE from the building. The bench mark is set 12 cm (0.4 ft)
below ground level, crimped to the top of a 9/16 in stainless steel rod driven
2.1 m (7 ft) to absolute refusal into bedrock, protected by a 4-inch PVC plastic
pipe with screw cap cover which projects 6 cm (0.2 ft) about natural grade.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 7 of 9
Station ID: 1612340 PUBLICATION DATE: 12/12/2003
Name: HONOLULU, HONOLULU HARBOR, OAHU ISLAND
HI
NOAA Chart: 19367 Latitude: 21° 18.4' N ( 21.30670)
USGS Quad: HONOLULU Longitude: 157° 52.0' W (-157.86700)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING:
DESIGNATION: 161 2340 GPS Bolt
MONUMENTATION: Bolt VM#: 13940
AGENCY: Hawaiian Sea Level Center (HSLC) IDB PID#:
SETTING CLASSIFICATION: Metal mast OPUS PID:
LATITUDE: 21° 18.2' N ( 21.30333) LONGITUDE: 157° 51.9' W (-157.86453)
The bench mark is a bolt head, southeastern-most of four bolts that secure the
flange of the antenna mast, located about half way between the roof and the
permanent GPS antenna of the Hawaii Sea Level Center, at the SW corner of the
roof of the Honolulu tide station, at the west end of the Coast Guard pier at
the Honolulu Coast Guard Base.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 8 of 9
Station ID: 1612340 PUBLICATION DATE: 12/12/2003
Name: HONOLULU, HONOLULU HARBOR, OAHU ISLAND
HI
NOAA Chart: 19367 Latitude: 21° 18.4' N ( 21.30670)
USGS Quad: HONOLULU Longitude: 157° 52.0' W (-157.86700)
T I D A L D A T U M S
Tidal datums at HONOLULU, HONOLULU HARBOR, OAHU ISLAND 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 (02/14/1967) = 1.034
MEAN HIGHER HIGH WATER MHHW = 0.580
MEAN HIGH WATER MHW = 0.439
MEAN SEA LEVEL MSL = 0.251
MEAN TIDE LEVEL MTL = 0.245
MEAN LOW WATER MLW = 0.050
MEAN LOWER LOW WATER MLLW = 0.000
LOWEST OBSERVED WATER LEVEL (04/30/1911) = -0.429
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
B.M. ELV. 8.06 FEET 2.573 2.134
161 2340 TIDAL 2 5.185 4.746
NO 11 1925 1.836 1.397
NO 12 1925 3.992 3.552
NO 13 1925 6.064 5.625
NO 14 1925 5.495 5.055
NO 20 1960 1.892 1.453
NO 21 1964 2.293 1.853
GSL 2340 1987 1.872 1.433
2340 A 1983 1.962 1.522
2340 B 1983 2.706 2.267
2340 C 1983 2.979 2.539
161 2340 GPS Bolt 5.297 4.858
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 9 of 9
Station ID: 1612340 PUBLICATION DATE: 12/12/2003
Name: HONOLULU, HONOLULU HARBOR, OAHU ISLAND
HI
NOAA Chart: 19367 Latitude: 21° 18.4' N ( 21.30670)
USGS Quad: HONOLULU Longitude: 157° 52.0' W (-157.86700)
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 local island datum. 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.
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/.
Station Location
Published bench mark
Unpublished bench mark
