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Datums Page Page 1 of 6
Station ID: 2695535 PUBLICATION DATE: 07/03/2019
Name: BER. BIO. STA, ST GEORGES, BERMUDA
BERMUDA
NOAA Chart: 5161 Latitude: 32° 22.2' N ( 32.37000)
USGS Quad: Longitude: 64° 41.7' W ( -64.69500)
To reach the tidal bench marks from St. Georges, proceed SW on Ferry Road for
2.4 km (1.5 mi) to Bermuda Biological Station in St. Georges West. The bench
marks are on the Biological Station grounds and on the SOL Bermuda property to
the north. The water level and water temperature sensor are located on the south
bulkhead wall of the ship dock and the APX enclosure is located in the
transformer room of the Scott Laboratory building.
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#: 1752
AGENCY: National Ocean Survey (NOS) IDB PID:
SETTING CLASSIFICATION: Concrete footing OPUS PID:
LATITUDE: 32° 22.4' N ( 32.37322) LONGITUDE: 64° 42.1' W ( -64.70142)
The 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, 19.81 m (65 ft) east of a storage and fuel oil test building, 15.24 m (50
ft) south of the approximate water edge, and 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: 5535 D 1978
DESIGNATION: 269 5535 D
MONUMENTATION: Tidal Station disk VM#: 1748
AGENCY: National Ocean Survey (NOS) IDB PID:
SETTING CLASSIFICATION: Concrete sea wall OPUS PID:
LATITUDE: 32° 22.4' N ( 32.37397) LONGITUDE: 64° 42.1' W ( -64.70139)
The bench mark is a disk set in the top of a concrete sea wall halfway down the
boat ramp on the west side of the boat ramp, 7.50 m (24.6 ft) north of the
bulkhead, 2 m (7 ft) east of the SE corner of the Scott Laboratory building, 2 m
(6 ft) west of the centerline of the boat ramp, and level with the ramp.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 6
Station ID: 2695535 PUBLICATION DATE: 07/03/2019
Name: BER. BIO. STA, ST GEORGES, BERMUDA
BERMUDA
NOAA Chart: 5161 Latitude: 32° 22.2' N ( 32.37000)
USGS Quad: Longitude: 64° 41.7' W ( -64.69500)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 5535 F 1978
DESIGNATION: 269 5535 F
MONUMENTATION: Tidal Station disk VM#: 1749
AGENCY: National 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, 5 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, and level with the sidewalk.
BENCH MARK STAMPING: 5540 C 1979
DESIGNATION: 269 5540 C
MONUMENTATION: Tidal Station disk VM#: 1753
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, 10.36 m (34 ft) north of the centerline of the road leading to the
Esso Terminal, 5.12 m (16.8 ft) east of the SE corner of the guard house, 0.3 m
(1 ft) south of the steps leading uphill to storage tanks, and 0.55 m (1.8 ft)
above ground level.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 6
Station ID: 2695535 PUBLICATION DATE: 07/03/2019
Name: BER. BIO. STA, ST GEORGES, BERMUDA
BERMUDA
NOAA Chart: 5161 Latitude: 32° 22.2' N ( 32.37000)
USGS Quad: Longitude: 64° 41.7' W ( -64.69500)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 4
DESIGNATION: 269 5535 TIDAL 4
MONUMENTATION: Survey disk VM#: 1754
AGENCY: Bermuda Biological Station IDB PID:
SETTING CLASSIFICATION: Concrete foundation 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, 4.88 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.
BENCH MARK STAMPING: 5535 E 1978
DESIGNATION: 269 5535 E
MONUMENTATION: Tidal Station disk VM#: 16914
AGENCY: National Ocean Survey (NOS) IDB PID:
SETTING CLASSIFICATION: Concrete footing OPUS PID:
LATITUDE: 32° 22.2' N ( 32.37000) LONGITUDE: 64° 41.7' W ( -64.69500)
The bench mark is set in the top of a concrete footing on the north side of
Scott Laboratory building, 7.32 m (24 ft) west of entrance to the Scott
Laboratory building, 2.62 m (8.6 ft) NE of the NW corner of the building, 1.0 m
(3.28 ft) north of the north face of the Scott Laboratory building.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 6
Station ID: 2695535 PUBLICATION DATE: 07/03/2019
Name: BER. BIO. STA, ST GEORGES, BERMUDA
BERMUDA
NOAA Chart: 5161 Latitude: 32° 22.2' N ( 32.37000)
USGS Quad: Longitude: 64° 41.7' W ( -64.69500)
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#: 22054
AGENCY: National Ocean Service IDB PID:
SETTING CLASSIFICATION: Bedrock OPUS PID:
LATITUDE: 32° 22.2' N ( 32.37045) 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.
BENCH MARK STAMPING: 5540 J 2016
DESIGNATION: 269 5540 J
MONUMENTATION: Tidal Station disk VM#: 22055
AGENCY: National Ocean Service IDB PID:
SETTING CLASSIFICATION: Concrete bulkhead OPUS PID:
LATITUDE: 32° 22.2' N ( 32.37015) LONGITUDE: 64° 41.7' W ( -64.69577)
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 6
Station ID: 2695535 PUBLICATION DATE: 07/03/2019
Name: BER. BIO. STA, ST GEORGES, BERMUDA
BERMUDA
NOAA Chart: 5161 Latitude: 32° 22.2' N ( 32.37000)
USGS Quad: Longitude: 64° 41.7' W ( -64.69500)
T I D A L D A T U M S
Tidal datums at BER. BIO. STA, ST GEORGES, BERMUDA based on:
LENGTH OF SERIES: 1 YEAR
TIME PERIOD: July 2017 - June 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 (09/25/1900) = 1.449
MEAN HIGHER HIGH WATER MHHW = 0.840
MEAN HIGH WATER MHW = 0.770
MEAN SEA LEVEL MSL = 0.397
MEAN TIDE LEVEL MTL = 0.395
MEAN LOW WATER MLW = 0.021
MEAN LOWER LOW WATER MLLW = 0.000
LOWEST OBSERVED WATER LEVEL (05/05/1985) = -0.544
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
5540 A 1979 13.196 12.426
5535 D 1978 3.682 2.912
5535 F 1978 5.707 4.937
5540 C 1979 6.176 5.406
4 6.728 5.958
5535 E 1978 7.007 6.237
5540 K 2016 5.725 4.955
5540 J 2016 2.179 1.409
Foot Notes:
Due to the remote location of this station and lack of nearby control stations
with 19-yr 1983-2001 NTDE equivalent datum, this stations datums are computed by
first reduction of the time series listed and not tied to the current 1983-2001
NTDE.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 6
Station ID: 2695535 PUBLICATION DATE: 07/03/2019
Name: BER. BIO. STA, ST GEORGES, BERMUDA
BERMUDA
NOAA Chart: 5161 Latitude: 32° 22.2' N ( 32.37000)
USGS Quad: Longitude: 64° 41.7' W ( -64.69500)
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/.
Station Location
Published bench mark
Unpublished bench mark
