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

                                                                                
Station ID: 2695540                                PUBLICATION DATE:  11/23/2011
Name:       BERMUDA ESSO PIER, ST. GEORGES ISLAND             
NOAA Chart: 5161                                   Latitude:         32° 22.4' N
USGS Quad:  NONE                                   Longitude:        64° 42.2' W


To reach the tidal bench marks from the town of St. Georges, proceed SW on Ferry
Road for 2.4 km (1.5 mi) to the ESSO facility. The bench marks are located on
ESSO property and at the Bermuda Biological Station. The tide gage is located
midway on the ESSO pier on the east side.


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


                 PRIMARY BENCH MARK STAMPING:  5540 A 1979
                         DESIGNATION:          269 5540 A

MONUMENTATION:           Tidal Station disk                        VM#:    12340
AGENCY:                  National Ocean Survey (NOS)               PID:         
SETTING CLASSIFICATION:  Concrete footing


The primary bench mark is a disk set flush in the top of a 0.91 m x 1.22 m x
0.15 m (3 ft x 4 ft x 0.5 ft) concrete footing on top of bedrock located SSW of
ESSO Fuel Pier, 19.90 m (65.29 ft) east of a storage and fuel oil test building,
and 15.20 m (49.87 ft) south of the approximate water edge.



                         BENCH MARK STAMPING:  5540 C 1979
                         DESIGNATION:          269 5540 C

MONUMENTATION:           Tidal Station disk                        VM#:    12341
AGENCY:                  National Ocean Survey (NOS)               PID:         
SETTING CLASSIFICATION:  Concrete retaining wall


The bench mark is a disk set flush in the top of a wall near the ESSO Terminal
guard house, 10.40 m (34.12 ft) north of the centerline of the road leading to
the ESSO Terminal, 5.12 m (16.80 ft) east of the SE corner of the guard house,
0.30 m (1.0 ft) south of the steps leading uphill to storage tanks, and 0.50 m
(1.64 ft) above ground level.

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

                                                                                
Station ID: 2695540                                PUBLICATION DATE:  11/23/2011
Name:       BERMUDA ESSO PIER, ST. GEORGES ISLAND             
NOAA Chart: 5161                                   Latitude:         32° 22.4' N
USGS Quad:  NONE                                   Longitude:        64° 42.2' W


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


                         BENCH MARK STAMPING:  5540 D 1988
                         DESIGNATION:          269 5540 D

MONUMENTATION:           Tidal Station disk                        VM#:    12342
AGENCY:                  National Ocean Service (NOS)              PID:         
SETTING CLASSIFICATION:  Concrete covered steel pile


The bench mark is a disk set flush in top of concrete covered steel piling on
the east side of the ESSO Fuel Pier located on the SE pile supporting the Wing
Pier, 4.69 m (15.4 ft) ENE of the center line of the pier walkway, 1.40 m (4.6
ft) east of the SE corner of the gage house and 0.49 m (1.6 ft) below deck
level.



                         BENCH MARK STAMPING:  5540 E 1988
                         DESIGNATION:          269 5540 E

MONUMENTATION:           Tidal Station disk                        VM#:    12343
AGENCY:                  National Ocean Service (NOS)              PID:         
SETTING CLASSIFICATION:  Concrete retaining wall


The bench mark is a disk set flush in top of a concrete retaining wall on the
east side of the ESSO fuel pier, 10.70 m (35.1 ft) north of spillwall around
storage tank, 9.39 m (30.8 ft) NNE of the NE corner of the the winch house and
1.07 m (3.5 ft) below deck level of the pier.

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

                                                                                
Station ID: 2695540                                PUBLICATION DATE:  11/23/2011
Name:       BERMUDA ESSO PIER, ST. GEORGES ISLAND             
NOAA Chart: 5161                                   Latitude:         32° 22.4' N
USGS Quad:  NONE                                   Longitude:        64° 42.2' W


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


                         BENCH MARK STAMPING:  4
                         DESIGNATION:          269 5540 TIDAL 4

MONUMENTATION:           Survey disk                               VM#:    12344
AGENCY:                  Bermuda Biological Station                PID:         
SETTING CLASSIFICATION:  Concrete pad


The bench mark is a disk set in the concrete base of an abandoned mail box at
the intersection of Biological Station Drive and Ferry Road, 6.71 m (22.0 ft)
south of the centerline of Ferry Road, 5 m (16 ft) east of the centerline of
Biological Station Drive, 0.43 m (1.4 ft) NW of a 0.52 m (1.7 ft) diameter cast
iron pipe set vertically in a concrete base, and about level with the ground.



                         BENCH MARK STAMPING:  5535 F 1978
                         DESIGNATION:          269 5535 F

MONUMENTATION:           Tidal Station disk                        VM#:    16920
AGENCY:                  Natiaonal Ocean Survey (NOS)              PID#:  DE6071
SETTING CLASSIFICATION:  Concrete sidewalk


The bench mark is a disk set in a concrete sidewalk at the SW corner of the
Alfred C. Redfield Library building, 4.88 m (16 ft) west of the entrance to the
library, 0.37 m (1.2 ft) east of the SW corner of the building, 0.15 m (0.5 ft)
south of the south face of the building.

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

                                                                                
Station ID: 2695540                                PUBLICATION DATE:  11/23/2011
Name:       BERMUDA ESSO PIER, ST. GEORGES ISLAND             
NOAA Chart: 5161                                   Latitude:         32° 22.4' N
USGS Quad:  NONE                                   Longitude:        64° 42.2' W


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


                         BENCH MARK STAMPING:  5535 H 1978
                         DESIGNATION:          269 5535 H

MONUMENTATION:           Tidal Station disk                        VM#:    16922
AGENCY:                  National Ocean Survey (NOS)               PID:         
SETTING CLASSIFICATION:  Concrete boat landing


The bench mark is a disk set in the top of a concrete boat landing in the
vicinity of the Scott Laboratory building, 8.53 m (28 ft) NW of the SW corner of
the building, 8.23 m (27 ft) WSW of the SW corner of the building, 7.77 m (25.5
ft) SW of the NW corner of the building, and 1.22 m (4 ft) below the road bed.

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

                                                                                
Station ID: 2695540                                PUBLICATION DATE:  11/23/2011
Name:       BERMUDA ESSO PIER, ST. GEORGES ISLAND             
NOAA Chart: 5161                                   Latitude:         32° 22.4' N
USGS Quad:  NONE                                   Longitude:        64° 42.2' W


                            T I D A L   D A T U M S 


Tidal datums at BERMUDA ESSO PIER, ST. GEORGES ISLAND based on:

     LENGTH OF SERIES:      199 MONTHS
     TIME PERIOD:           May 1993 - November 2009
     TIDAL EPOCH:           1983-2001
     CONTROL TIDE STATION:   


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

     HIGHEST OBSERVED WATER LEVEL (10/26/1995)         =  1.474
     MEAN HIGHER HIGH WATER                     MHHW   =  0.862
     MEAN HIGH WATER                            MHW    =  0.783
     MEAN SEA LEVEL                             MSL    =  0.405
     MEAN TIDE LEVEL                            MTL    =  0.404
     MEAN LOW WATER                             MLW    =  0.024
     MEAN LOWER LOW WATER                       MLLW   =  0.000
     LOWEST  OBSERVED WATER LEVEL (04/07/1997)         = -0.478



Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     5540 A 1979                                13.269   12.486
     5540 C 1979                                 6.249    5.466
     5540 D 1988                                 3.755    2.972
     5540 E 1988                                 7.084    6.301
     4                                           6.801    6.018
     5535 F 1978                                 5.782    4.999
     5535 H 1978                                 1.415    0.632


Foot Notes:

Bench marks 5535 F 1978, and 5535 H 1978 are based on one differential leveling
connection and do not meet the quality control standards of the NOS.  Therefore,
caution should be used when deriving elevations for these marks.

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

                                                                                
Station ID: 2695540                                PUBLICATION DATE:  11/23/2011
Name:       BERMUDA ESSO PIER, ST. GEORGES ISLAND             
NOAA Chart: 5161                                   Latitude:         32° 22.4' N
USGS Quad:  NONE                                   Longitude:        64° 42.2' 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.