U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 8
Station ID: 2695540 PUBLICATION DATE: 05/17/2021
Name: BERMUDA, ST. GEORGES ISLAND
BERMUDA
NOAA Chart: 5161 Latitude: 32° 22.4' N ( 32.37339)
USGS Quad: Longitude: 64° 42.2' W ( -64.70331)
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 Sol facility. The bench marks are located on Sol
property and at the Bermuda Biological Station. The tide gauge is located midway
on the Sol 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) IDB PID:
SETTING CLASSIFICATION: Concrete footing OPUS PID#: BBDP99
LATITUDE: 32° 22.4' N ( 32.37322) LONGITUDE: 64° 42.1' W ( -64.70142)
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,
15.20 m (49.87 ft) south of the approximate water edge, 4.0 m (13.1 ft) SSE of
the chain link fence, and 1.8 m (5.9 ft) SSW of a flagpole.
BENCH MARK STAMPING: 5540 C 1979
DESIGNATION: 269 5540 C
MONUMENTATION: Tidal Station disk VM#: 12341
AGENCY: National Ocean Survey (NOS) IDB PID:
SETTING CLASSIFICATION: Concrete retaining wall OPUS PID:
LATITUDE: 32° 22.3' N ( 32.37217) LONGITUDE: 64° 41.9' W ( -64.69900)
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 8
Station ID: 2695540 PUBLICATION DATE: 05/17/2021
Name: BERMUDA, ST. GEORGES ISLAND
BERMUDA
NOAA Chart: 5161 Latitude: 32° 22.4' N ( 32.37339)
USGS Quad: Longitude: 64° 42.2' W ( -64.70331)
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) IDB PID:
SETTING CLASSIFICATION: Concrete covered steel pile OPUS PID:
LATITUDE: 32° 22.4' N ( 32.37397) LONGITUDE: 64° 42.1' W ( -64.70144)
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) IDB PID:
SETTING CLASSIFICATION: Concrete retaining wall OPUS PID:
LATITUDE: 32° 22.4' N ( 32.37353) LONGITUDE: 64° 42.1' W ( -64.70097)
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 8
Station ID: 2695540 PUBLICATION DATE: 05/17/2021
Name: BERMUDA, ST. GEORGES ISLAND
BERMUDA
NOAA Chart: 5161 Latitude: 32° 22.4' N ( 32.37339)
USGS Quad: Longitude: 64° 42.2' W ( -64.70331)
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 IDB PID:
SETTING CLASSIFICATION: Concrete pad OPUS PID:
LATITUDE: 32° 22.3' N ( 32.37225) LONGITUDE: 64° 41.9' W ( -64.69817)
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) IDB PID:
SETTING CLASSIFICATION: Concrete sidewalk OPUS PID:
LATITUDE: 32° 22.2' N ( 32.37078) LONGITUDE: 64° 41.8' W ( -64.69636)
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 8
Station ID: 2695540 PUBLICATION DATE: 05/17/2021
Name: BERMUDA, ST. GEORGES ISLAND
BERMUDA
NOAA Chart: 5161 Latitude: 32° 22.4' N ( 32.37339)
USGS Quad: Longitude: 64° 42.2' W ( -64.70331)
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) IDB PID:
SETTING CLASSIFICATION: Concrete boat landing OPUS PID:
LATITUDE: 32° 22.2' N ( 32.37011) LONGITUDE: 64° 41.7' W ( -64.69519)
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.
BENCH MARK STAMPING: 5540 J 2016
DESIGNATION: 269 5540 J
MONUMENTATION: Tidal Station disk VM#: 23089
AGENCY: National Ocean Service IDB PID:
SETTING CLASSIFICATION: Concrete bulkhead OPUS PID:
LATITUDE: 32° 22.2' N ( 32.37017) LONGITUDE: 64° 41.7' W ( -64.69578)
The bench marks is located at the Bermuda Institute of Ocean Sciences campus set
flush into the concrete of the ship dock, 7.40 m (24.3 ft) north of the
southernmost edge of the ship dock seawall, 7.30 m (24.0 ft) west of the cleat
on the eastern edge of dock area, 7.10 m (23.3 ft) NW of the base of the knuckle
crane, and 0.80 m (2.6 ft) south of the southern wall to the Scott Laboratory
building.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 8
Station ID: 2695540 PUBLICATION DATE: 05/17/2021
Name: BERMUDA, ST. GEORGES ISLAND
BERMUDA
NOAA Chart: 5161 Latitude: 32° 22.4' N ( 32.37339)
USGS Quad: Longitude: 64° 42.2' W ( -64.70331)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 5540 K 2016
DESIGNATION: 269 5540 K
MONUMENTATION: Tidal Station disk VM#: 23090
AGENCY: National Ocean Service IDB PID:
SETTING CLASSIFICATION: Bedrock OPUS PID:
LATITUDE: 32° 22.2' N ( 32.37044) LONGITUDE: 64° 41.8' W ( -64.69708)
The bench mark is located at the Bermuda Institute of Ocean Sciences campus,
26.10 m (85.6 ft) north of utility pole painted with a yellow marking, 20.40 m
(66.9 ft) SW of utility pole labeled 'bel xa5 1134' , and 2.20 m (7.2 ft) west
of the centerline of the one way road, set in bedrock elevated 0.3 m (1.0 ft)
above the road surface.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 8
Station ID: 2695540 PUBLICATION DATE: 05/17/2021
Name: BERMUDA, ST. GEORGES ISLAND
BERMUDA
NOAA Chart: 5161 Latitude: 32° 22.4' N ( 32.37339)
USGS Quad: Longitude: 64° 42.2' W ( -64.70331)
T I D A L D A T U M S
Tidal datums at BERMUDA, ST. GEORGES ISLAND based on:
LENGTH OF SERIES: 17 YEARS
TIME PERIOD: May 1993 - November 2018
TIDAL EPOCH: 0000-0000
CONTROL TIDE STATION:
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
HIGHEST OBSERVED WATER LEVEL (10/26/1995) = 1.464
MEAN HIGHER HIGH WATER MHHW = 0.864
MEAN HIGH WATER MHW = 0.787
MEAN SEA LEVEL MSL = 0.407
MEAN TIDE LEVEL MTL = 0.405
MEAN LOW WATER MLW = 0.024
MEAN LOWER LOW WATER MLLW = 0.000
LOWEST OBSERVED WATER LEVEL (04/07/1997) = -0.488
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
5540 A 1979 13.259 12.472
5540 C 1979 6.239 5.452
5540 D 1988 3.745 2.958
5540 E 1988 7.073 6.286
4 6.791 6.004
5535 F 1978 5.770 4.983
5535 H 1978 1.405 0.618
5540 J 2016 2.242 1.455
5540 K 2016 5.787 5.000
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 7 of 8
Station ID: 2695540 PUBLICATION DATE: 05/17/2021
Name: BERMUDA, ST. GEORGES ISLAND
BERMUDA
NOAA Chart: 5161 Latitude: 32° 22.4' N ( 32.37339)
USGS Quad: Longitude: 64° 42.2' W ( -64.70331)
Foot Notes:
Bench marks '5540 J 2016', '5535 H 1978', and '5540 K 2016' 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 8 of 8
Station ID: 2695540 PUBLICATION DATE: 05/17/2021
Name: BERMUDA, ST. GEORGES ISLAND
BERMUDA
NOAA Chart: 5161 Latitude: 32° 22.4' N ( 32.37339)
USGS Quad: Longitude: 64° 42.2' W ( -64.70331)
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/.