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

                                                                                
Station ID: 1617760                                PUBLICATION DATE:  04/21/2003
Name:       HILO, HILO BAY, KUHIO BAY, HAWAII ISLAND          
            HAWAII
NOAA Chart: 19324                                  Latitude:         19° 43.8' N
USGS Quad:  HILO                                   Longitude:       155°  3.4' W


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)     PID#:  TU0020
SETTING CLASSIFICATION:  Concrete foundation


The primary bench mark is a disk 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, about 146 m (480 ft) south of the foot of Pier 1, and 58
m (189 ft) west of the centerline of the main gate.



                         BENCH MARK STAMPING:  E 2 1926
                         DESIGNATION:          161 7760 E 2

MONUMENTATION:           Tidal Station disk                        VM#:     1665
AGENCY:                  US Coast and Geodetic Survey (USC&GS)     PID#:  TU0017
SETTING CLASSIFICATION:  Concrete pier deck


The bench mark is a disk set in the concrete deck at the southern end of Pier 1,
12.50 m (41.0 ft) NW of the SW corner of the Pier 1 building, 3.05 m (10.0 ft)
south of the pier face corner, 0.76 m (2.5 ft) west of the southern-most bollard
along Pier 1, and 0.09 m (0.3 ft) below level of asphalt.

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

                                                                                
Station ID: 1617760                                PUBLICATION DATE:  04/21/2003
Name:       HILO, HILO BAY, KUHIO BAY, HAWAII ISLAND          
            HAWAII
NOAA Chart: 19324                                  Latitude:         19° 43.8' N
USGS Quad:  HILO                                   Longitude:       155°  3.4' W


                         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)          PID:         
SETTING CLASSIFICATION:  Concrete deck


The bench mark is a disk set flush in concrete deck of Pier 3, 15.39 m (50.5 ft)
NW of the SE (inshore) end of Pier 3, 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)              PID:         
SETTING CLASSIFICATION:  Rock outcrop


The bench mark is a disk 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:  04/21/2003
Name:       HILO, HILO BAY, KUHIO BAY, HAWAII ISLAND          
            HAWAII
NOAA Chart: 19324                                  Latitude:         19° 43.8' N
USGS Quad:  HILO                                   Longitude:       155°  3.4' W


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


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

MONUMENTATION:           Tidal Station disk                        VM#:     1671
AGENCY:                  National Ocean Service (NOS)              PID:         
SETTING CLASSIFICATION:  Concrete slab


The bench mark is a disk set on the most northerly corner of a 2 m x 1.37 m (8
ft x 4.5 ft) platform that supports two large green telephone relay boxes under
a roof on the west side of a driveway that leads to the green warehouse at 888
Kalanianaole Street, 92 m (302 ft) SW of bench mark 7760 C 1983, 24 m (80 ft) NW
of the most westerly corner of the warehouse, 10.76 m (35.3 ft) SE of the
centerline of Kalanianaole Street, and 4.42 m (14.5 ft) SE of a utility pole.



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

MONUMENTATION:           Tidal Station disk                        VM#:     1672
AGENCY:                  National Ocean Service (NOS)              PID:         
SETTING CLASSIFICATION:  Rock outcrop


The bench mark is a disk set in a lava outcropping on the south side of
Kalanianole Street betweet telephone poles Nos. 33 and 34, about 0.3 km (0.2 mi)
NE along Kalanianole Street from the U.S. Customs House on Kuhio Street, 92 m
(302 ft) NE of bench mark 7760 B 1983, 22.68 m (74.4 ft) east of a yellow fire
hydrant, 16 m (54 ft) east of utility pole #33, 12.65 m (41.5 ft) SW of
telephone pole #34, 12.04 m (39.5 ft) south of the centerline of Kalanianole
Street, 0.15 m (0.5 ft) south of the edge of the outcropping, and 1.07 m (3.5
ft) above ground level.

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

                                                                                
Station ID: 1617760                                PUBLICATION DATE:  04/21/2003
Name:       HILO, HILO BAY, KUHIO BAY, HAWAII ISLAND          
            HAWAII
NOAA Chart: 19324                                  Latitude:         19° 43.8' N
USGS Quad:  HILO                                   Longitude:       155°  3.4' W


                         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)              PID:         
SETTING CLASSIFICATION:  Lava rock outcrop


The bench mark is a disk 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:  7760 H 1994
                         DESIGNATION:          161 7760 H

MONUMENTATION:           Tidal Station disk                        VM#:    12706
AGENCY:                  National Ocean Service (NOS)              PID:         
SETTING CLASSIFICATION:  Concrete pier deck


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, 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.

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

                                                                                
Station ID: 1617760                                PUBLICATION DATE:  04/21/2003
Name:       HILO, HILO BAY, KUHIO BAY, HAWAII ISLAND          
            HAWAII
NOAA Chart: 19324                                  Latitude:         19° 43.8' N
USGS Quad:  HILO                                   Longitude:       155°  3.4' W


                            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 (01/20/1981)         =  1.148
     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
     E 2 1926                                    2.518    1.918
     161 7760 TIDAL 5                            2.704    2.105
     7760 A 1983                                 5.900    5.301
     7760 B 1983                                 4.514    3.915
     7760 C 1983                                 5.845    5.246
     7760 G 1987                                 5.898    5.299
     7760 H 1994                                 2.718    2.118


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

                                                                                
Station ID: 1617760                                PUBLICATION DATE:  04/21/2003
Name:       HILO, HILO BAY, KUHIO BAY, HAWAII ISLAND          
            HAWAII
NOAA Chart: 19324                                  Latitude:         19° 43.8' N
USGS Quad:  HILO                                   Longitude:       155°  3.4' 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 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.