U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 6
Station ID: 1612480 PUBLICATION DATE: 12/22/2017
Name: MOKUOLOE, KANEOHE BAY, OAHU ISLAND
HI
NOAA Chart: 19359 Latitude: 21° 26.0' N ( 21.43306)
USGS Quad: KANEOHE Longitude: 157° 47.4' W (-157.79000)
To reach the tidal bench marks, from the Lunalilo Highway (H-1) take Exit 20A
north onto the Likelike Highway (Route 63), proceed to the Kamehameha Highway
(Route 83) and turn left, proceed to Lilipuna Road and turn right (east).
Proceed 2.1 km (1.3 mi) until an unmarked entrance to the University of Hawaii
Marine Lab Dock is reached. There is a gate across the driveway for which you
will need an access code to open it. Park in the parking lot and take the ferry
over to Coconut Island. The bench marks are located in the vicinity on the
island. The tide station is located on the west side of the island adjacent to
the shark ponds.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: NO 2 1957
DESIGNATION: 161 2480 NO 2
MONUMENTATION: Tidal Station disk VM#: 42
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: DK3432
SETTING CLASSIFICATION: Concrete bulkhead OPUS PID:
LATITUDE: 21° 26.0' N ( 21.43286) LONGITUDE: 157° 47.4' W (-157.78958)
The bench mark is set at intersection of concrete bulkheads of the sluice gate
on the south side of the west of three smaller fish ponds to the south of Long
Pond, 50 m (165 ft) SE of bench mark 161 2480 NO 1, 23 m (75 ft) east of the SW
corner of the pond area, and 2 m (5 ft) north of the north side of the small
boat basin.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 6
Station ID: 1612480 PUBLICATION DATE: 12/22/2017
Name: MOKUOLOE, KANEOHE BAY, OAHU ISLAND
HI
NOAA Chart: 19359 Latitude: 21° 26.0' N ( 21.43306)
USGS Quad: KANEOHE Longitude: 157° 47.4' W (-157.79000)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: NO 3 1957
DESIGNATION: 161 2480 NO 3
MONUMENTATION: Tidal Station disk VM#: 43
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#:
SETTING CLASSIFICATION: Concrete pavement OPUS PID:
LATITUDE: 21° 26.0' N ( 21.43289) LONGITUDE: 157° 47.3' W (-157.78867)
The bench mark is set in concrete driveway to an old concrete pier near the SE
corner of fish experiment ponds, 16 m (54 ft) NE from the NW corner of the
boathouse, 12 m (41 ft) north of the NE corner of a three phase concrete block
above a ground transformer vault, 12 m (38 ft) west from the north end of a
reinforced concrete offset in the bulkhead wall along the east side of the
island's perimeter road, 9 m (29 ft) west of the centerline of the concrete
island road, and 0.30 m (1.0 ft) north of the south edge of the driveway.
BENCH MARK STAMPING: NO 6 1967
DESIGNATION: 161 2480 NO 6
MONUMENTATION: Tidal Station disk VM#: 46
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#:
SETTING CLASSIFICATION: Concrete curb OPUS PID:
LATITUDE: 21° 25.9' N ( 21.43231) LONGITUDE: 157° 47.3' W (-157.78892)
The bench mark is set in top of concrete curb at the SE corner of an old
building foundation which is near the SE corner of the small boat basin, 10.58 m
(34.7 ft) east of the east rail of the marine railway, 5 m (18 ft) west of the
center of the dirt road around the island, 2.13 m (7.0 ft) NE of the NE corner
the smaller of two transformer vaults, and 0.30 m (1.0 ft) above ground level.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 6
Station ID: 1612480 PUBLICATION DATE: 12/22/2017
Name: MOKUOLOE, KANEOHE BAY, OAHU ISLAND
HI
NOAA Chart: 19359 Latitude: 21° 26.0' N ( 21.43306)
USGS Quad: KANEOHE Longitude: 157° 47.4' W (-157.79000)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: NO 8 1968
DESIGNATION: 161 2480 NO 8
MONUMENTATION: Tidal Station disk VM#: 48
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#:
SETTING CLASSIFICATION: Concrete walk OPUS PID:
LATITUDE: 21° 26.0' N ( 21.43353) LONGITUDE: 157° 47.2' W (-157.78731)
The bench mark is set in the concrete walk in front of the entrance to the west
side of the Coral Reef Ecology Building on the east side of the island, 10 m (32
ft) north of the SW corner of the building, 3.23 m (10.6 ft) east of the center
of the dirt road around the island, and 1.37 m (4.5 ft) west of the west wall.
BENCH MARK STAMPING: TIDAL BM 2480 J 1978
DESIGNATION: 161 2480 J
MONUMENTATION: Tidal Station disk VM#: 49
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete foundation OPUS PID:
LATITUDE: 21° 26.1' N ( 21.43431) LONGITUDE: 157° 47.3' W (-157.78911)
The bench mark is set in the 1 m (3 ft) high concrete foundation on the west
side of the four fish pools on the west side of the island where there are
several 2-inch diameter galvanized steel pipes extending 3 m (9 ft) up from the
foundation around the pools, approximately 128 m (420 ft) north of bench mark NO
4 1959, 6.04 m (19.8 ft) NW of the concrete seawall, 5.12 m (16.8 ft) south of
the north end of the fish ponds, and 0.09 m (0.3 ft) east of the west side of
the foundation.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 6
Station ID: 1612480 PUBLICATION DATE: 12/22/2017
Name: MOKUOLOE, KANEOHE BAY, OAHU ISLAND
HI
NOAA Chart: 19359 Latitude: 21° 26.0' N ( 21.43306)
USGS Quad: KANEOHE Longitude: 157° 47.4' W (-157.79000)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 2480 L 2002
DESIGNATION: 161 2480 L
MONUMENTATION: Tidal Station disk VM#: 16654
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete drainage culvert OPUS PID:
LATITUDE: 21° 26.0' N ( 21.43381) LONGITUDE: 157° 47.3' W (-157.78878)
The bench mark is set flush in a concrete drainage culvert, 25 m (82 ft) NNW of
the NW corner of a green cinder-block maintenance shed, 23.65 m (77.6 ft) south
of the south corner of a driveway which leads towards the water, 19 m (62 ft)
west of the center of a Y junction in the main road, of which the high road
leads to the upper campus, and 1.91 m (6.3 ft) NNE of the west end of the
culvert.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 6
Station ID: 1612480 PUBLICATION DATE: 12/22/2017
Name: MOKUOLOE, KANEOHE BAY, OAHU ISLAND
HI
NOAA Chart: 19359 Latitude: 21° 26.0' N ( 21.43306)
USGS Quad: KANEOHE Longitude: 157° 47.4' W (-157.79000)
T I D A L D A T U M S
Tidal datums at MOKUOLOE, KANEOHE BAY, 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 (08/21/2017) = 1.095
MEAN HIGHER HIGH WATER MHHW = 0.646
MEAN HIGH WATER MHW = 0.548
MEAN TIDE LEVEL MTL = 0.321
MEAN SEA LEVEL MSL = 0.320
MEAN LOW WATER MLW = 0.095
MEAN LOWER LOW WATER MLLW = 0.000
LOWEST OBSERVED WATER LEVEL (06/10/1968) = -0.433
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
NO 2 1957 1.166 0.619
NO 3 1957 2.048 1.500
NO 6 1967 1.959 1.412
NO 8 1968 1.885 1.338
TIDAL BM 2480 J 1978 1.831 1.283
2480 L 2002 1.045 0.497
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 6
Station ID: 1612480 PUBLICATION DATE: 12/22/2017
Name: MOKUOLOE, KANEOHE BAY, OAHU ISLAND
HI
NOAA Chart: 19359 Latitude: 21° 26.0' N ( 21.43306)
USGS Quad: KANEOHE Longitude: 157° 47.4' W (-157.79000)
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/.