U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
Datums Page                                                        Page  1 of  6

                                                                                
Station ID: 1617760                         PUBLICATION DATE:  09/20/2017
Name:       HILO, HILO BAY, KUHIO BAY, HAWAII ISLAND          
            HI
NOAA Chart: 19324                           Latitude:   19° 43.8' N (  19.73028)
USGS Quad:  HILO                            Longitude: 155°  3.3' W (-155.05556)


To reach the tidal bench marks, from Hilo Airport proceed out to the airport
exit to Kanoelehua Avenue (Route 11) and turn right, proceed 1.1 km (0.7 mi) to
Kamehameha Highway (Route 19) and turn right, bear NE onto Kalanianaole Street
and proceed 1.1 km (0.7 mi) to Kuhio Street leading into the Port of Hilo, turn
left onto Kuhio Street, pass through the gate into the Port of Hilo and bear NW
to Pier 2.  The bench marks are located along SR11 and are in the vicinity of
Pier 2.  The tide station is a wooden building inside the Pier 2 warehouse.


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


                 PRIMARY BENCH MARK STAMPING:  NO 4 1951
                         DESIGNATION:          161 7760 TIDAL 4

MONUMENTATION:           Tidal Station disk                    VM#:         1663
AGENCY:                  US Coast and Geodetic Survey
                         (USC&GS)                              IDB PID#:  TU0020
SETTING CLASSIFICATION:  Concrete foundation                   OPUS PID:        
LATITUDE:   19° 43.7' N (  19.72892)          LONGITUDE: 155°  3.7' W (-155.06225)


The primary bench mark is set in top of east corner of the northern-most
concrete foundation for elevated water tank which rests on solid rock on State
Port of Hilo property, 160 m (525 ft) south of the foot of Pier 1, and 63 m (207
ft) west of the centerline of the main gate8.16 m (26.8 ft) north of center
vertical water main and 0.33 (1.0 ft) NE of SW face of pier.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  2 of  6

                                                                                
Station ID: 1617760                         PUBLICATION DATE:  09/20/2017
Name:       HILO, HILO BAY, KUHIO BAY, HAWAII ISLAND          
            HI
NOAA Chart: 19324                           Latitude:   19° 43.8' N (  19.73028)
USGS Quad:  HILO                            Longitude: 155°  3.3' W (-155.05556)


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


                         BENCH MARK STAMPING:   
                         DESIGNATION:          161 7760 TIDAL 5
                         ALIAS:                5 1959

MONUMENTATION:           Triangulation Station disk            VM#:         1667
AGENCY:                  US Army Corps of Engineers (USE)      IDB PID#:  DO8011
SETTING CLASSIFICATION:  Concrete deck                         OPUS PID:        
LATITUDE:   19° 43.8' N (  19.72939)          LONGITUDE: 155°  3.3' W (-155.05533)


The bench mark is set in concrete deck of Pier 3, 15.39 m (50.5 ft) NW of the SE
(inshore) end of Pier 3, 12.0 m (39.4 ft) SE of second bollard NW of inshore end
of pier, and 0.30 m (1.0 ft) NE of SW face of pier.



                         BENCH MARK STAMPING:  7760 A 1983
                         DESIGNATION:          161 7760 A

MONUMENTATION:           Tidal Station disk                    VM#:         1670
AGENCY:                  National Ocean Service (NOS)          IDB PID:         
SETTING CLASSIFICATION:  Rock outcrop                          OPUS PID:        
LATITUDE:   19° 43.7' N (  19.72781)          LONGITUDE: 155°  3.3' W (-155.05439)


The bench mark is set in a lava rock outcropping in the south corner of the U.S.
Customs yard at the intersection of Kalanianole and Kuhio Streets, 28.56 m (93.7
ft) SW of the SW corner of the U.S. Customs House, 16.06 m (52.7 ft) SW of the
west leg of a 15 m (50 ft) micro wave antenna, 4.27 m (14.0 ft) west of the west
edge of a driveway that leads to the U.S. Customs Parking Lot, 1.92 m (6.3 ft)
east of a chain fence that surrounds the Armour Oil Hawaii Tank Farm, and  0.09
m (0.3 ft) above ground level.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  3 of  6

                                                                                
Station ID: 1617760                         PUBLICATION DATE:  09/20/2017
Name:       HILO, HILO BAY, KUHIO BAY, HAWAII ISLAND          
            HI
NOAA Chart: 19324                           Latitude:   19° 43.8' N (  19.73028)
USGS Quad:  HILO                            Longitude: 155°  3.3' W (-155.05556)


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


                         BENCH MARK STAMPING:  7760 G 1987
                         DESIGNATION:          161 7760 G

MONUMENTATION:           Tidal Station disk                    VM#:         1673
AGENCY:                  National Ocean Service (NOS)          IDB PID:         
SETTING CLASSIFICATION:  Lava rock outcrop                     OPUS PID:        
LATITUDE:   19° 43.6' N (  19.72664)          LONGITUDE: 155°  3.4' W (-155.05619)


The bench mark is set in a lava outcropping fronting SS Motor Supply at 500
Kalanianaole Street across street from grey ware house, 27.74 m (91.0 ft) SW of
old utility pole #17X, 24.38 m (80.0 ft) NE of a yellow fire hydrant, 6.89 m
(22.6 ft) north of NW corner of a white metal faced building, 4.21 m (13.8 ft)
NW of NW face of building, 1.40 m (4.6 ft) SE of edge of road, and 0.46 m (1.5
ft) above road level.



                         BENCH MARK STAMPING:  LYMAN 1977
                         DESIGNATION:          161 7760 LYMAN

MONUMENTATION:           Horizontal Station disk               VM#:         1757
AGENCY:                  National Geodetic Survey (NGS)        IDB PID#:  TU2250
SETTING CLASSIFICATION:  Concrete monument in pavement         OPUS PID:        
LATITUDE:   19° 43.4' N (  19.72261)          LONGITUDE: 155°  3.3' W (-155.05464)


The bench mark is a disk set in a at grade 1-foot square concrete monument on
the east side of the curving intersection of Silva and Kamehameha roads, 13.26 m
(43.5 ft) east of the centerline of the road, 7.47 m (24.5 ft) east of the guard
rail, 4.44 m (14.6 ft) south of second cyclone fence post north of corner post,
and 2.53 m (8.3 ft) west of the cyclone fence, 2.35 m (7.7 ft) NW of metal
witness sign on fence, 2.45 m (8.0 ft) NE of metal witness sign on fence.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  4 of  6

                                                                                
Station ID: 1617760                         PUBLICATION DATE:  09/20/2017
Name:       HILO, HILO BAY, KUHIO BAY, HAWAII ISLAND          
            HI
NOAA Chart: 19324                           Latitude:   19° 43.8' N (  19.73028)
USGS Quad:  HILO                            Longitude: 155°  3.3' W (-155.05556)


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


                         BENCH MARK STAMPING:  7760 H 1994
                         DESIGNATION:          161 7760 H

MONUMENTATION:           Tidal Station disk                    VM#:        12706
AGENCY:                  National Ocean Service (NOS)          IDB PID:         
SETTING CLASSIFICATION:  Concrete pier deck                    OPUS PID:        
LATITUDE:   19° 43.8' N (  19.73075)          LONGITUDE: 155°  3.3' W (-155.05550)


The bench mark is a disk set in the concrete deck of Pier 2 Port of Hilo, 81.32
m (266.8 ft) east of the west end of Pier 2/3, 29.05 m (95.3 ft) east of the 135
degree corner where Pier 2 face changes from a northerly to a northwesterly
direction, 18.75 m (61.5 ft) NW of the NW corner of Pier 2/3 transit shed, 8.90
m (29.2 ft) NE of a red fire plug, 6.35 m (20.8 ft) east of 2.5 ft high bollard,
0.94 m (3.1 ft) south of the face of Pier 2, and 0.61 m (2.0 ft) SW of the
center of a 0.30 m (1.0 ft) high steel bollard.  Note: Mark is covered by a
moveable bull rail #32, requires a forklift to move.



                         BENCH MARK STAMPING:  7760 J 2016
                         DESIGNATION:          161 7760 J

MONUMENTATION:           Tidal Station disk                    VM#:        21856
AGENCY:                  National Ocean Service                IDB PID:         
SETTING CLASSIFICATION:  Concrete pier                         OPUS PID:        
LATITUDE:   19° 43.8' N (  19.73000)          LONGITUDE: 155°  3.3' W (-155.05500)


The bench mark is a disk set in concrete on the N side of the pier 2 near the
fourth bollard W of the E end of the pier, located 51.5 m (169.0 ft) W of the E
end of the pier 2, 13.0 m (42.7 ft) NE of fire hydrant on the N side of the pier
2 warehouse near the NE corner of the building, 13.2 m (43.3 ft) NW of the NE
corner of the pier 2 warehouse, 1.2 m (3.9 ft) S of the N edge of the concrete
pier, 0.6 m (2.0 ft) S of the center of the grey bollard.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  5 of  6

                                                                                
Station ID: 1617760                         PUBLICATION DATE:  09/20/2017
Name:       HILO, HILO BAY, KUHIO BAY, HAWAII ISLAND          
            HI
NOAA Chart: 19324                           Latitude:   19° 43.8' N (  19.73028)
USGS Quad:  HILO                            Longitude: 155°  3.3' W (-155.05556)


                            T I D A L   D A T U M S 


Tidal datums at HILO, HILO BAY, KUHIO BAY, HAWAII ISLAND based on:

     LENGTH OF SERIES:      19 YEARS
     TIME PERIOD:           January 1983 - December 2001
     TIDAL EPOCH:           1983-2001
     CONTROL TIDE STATION:  1612340 HONOLULU, HONOLULU HARBOR, OAHU ISLAND


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

     HIGHEST OBSERVED WATER LEVEL (07/24/2017)         =  1.201
     MEAN HIGHER HIGH WATER                     MHHW   =  0.731
     MEAN HIGH WATER                            MHW    =  0.599
     MEAN SEA LEVEL                             MSL    =  0.349
     MEAN TIDE LEVEL                            MTL    =  0.345
     MEAN LOW WATER                             MLW    =  0.091
     MEAN LOWER LOW WATER                       MLLW   =  0.000
     LOWEST  OBSERVED WATER LEVEL (06/20/1955)         = -0.495



Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     NO 4 1951                                   3.467    2.868
     161 7760 TIDAL 5                            2.703    2.103
     7760 A 1983                                 5.899    5.300
     7760 G 1987                                 5.898    5.299
     LYMAN 1977                                  8.417    7.818
     7760 H 1994                                 2.718    2.119
     7760 J 2016                                 2.730    2.131


Foot Notes:

Bench mark 7760 J 2016 is based on one differential leveling connection and does
not meet the quality control standards of the NOS. Therefore, caution should be
used when deriving elevations for this mark.

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

                                                                                
Station ID: 1617760                         PUBLICATION DATE:  09/20/2017
Name:       HILO, HILO BAY, KUHIO BAY, HAWAII ISLAND          
            HI
NOAA Chart: 19324                           Latitude:   19° 43.8' N (  19.73028)
USGS Quad:  HILO                            Longitude: 155°  3.3' W (-155.05556)


                             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/.