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Datums Page Page 1 of 6
Station ID: 2695535 PUBLICATION DATE: 03/09/2004
Name: BER. BIO. STA, ST GEORGES, BERMUDA
NOAA Chart: NONE Latitude: 32° 22.2' N ( 32.37000)
USGS Quad: NONE 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 Esso Bermuda property to
the north. The tide gage and staff were located in the vicinity of the Scott
Laboratory building.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 5535 H 1978
DESIGNATION: 269 5535 H
MONUMENTATION: Tidal Station disk VM#: 1751
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete boat landing OPUS PID:
LATITUDE: ' °deg (0) LONGITUDE: ' °deg (0)
The primary 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: 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: ' °deg (0) LONGITUDE: ' °deg (0)
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: 03/09/2004
Name: BER. BIO. STA, ST GEORGES, BERMUDA
NOAA Chart: NONE Latitude: 32° 22.2' N ( 32.37000)
USGS Quad: NONE 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#: DE6071
SETTING CLASSIFICATION: Concrete sidewalk OPUS PID:
LATITUDE: ' °deg (0) LONGITUDE: ' °deg (0)
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: 5535 G 1978
DESIGNATION: 269 5535 G
MONUMENTATION: Tidal Station disk VM#: 1750
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete monument OPUS PID:
LATITUDE: ' °deg (0) LONGITUDE: ' °deg (0)
The bench mark is a disk set in a concrete monument on the hill in front of the
main building, 22.13 m (72.6 ft) west of the SW corner of the library building,
19.72 m (64.7 ft) NE of the NW corner of the main building, 12.31 m (40.4 ft)
north of the first step leading to the main building, and level with the ground.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 6
Station ID: 2695535 PUBLICATION DATE: 03/09/2004
Name: BER. BIO. STA, ST GEORGES, BERMUDA
NOAA Chart: NONE Latitude: 32° 22.2' N ( 32.37000)
USGS Quad: NONE 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 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: ' °deg (0) LONGITUDE: ' °deg (0)
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, and 15.24 m
(50 ft) south of the approximate water edge.
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: Wall OPUS PID:
LATITUDE: ' °deg (0) LONGITUDE: ' °deg (0)
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 4 of 6
Station ID: 2695535 PUBLICATION DATE: 03/09/2004
Name: BER. BIO. STA, ST GEORGES, BERMUDA
NOAA Chart: NONE Latitude: 32° 22.2' N ( 32.37000)
USGS Quad: NONE 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: ' °deg (0) LONGITUDE: ' °deg (0)
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: ' °deg (0) LONGITUDE: ' °deg (0)
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 5 of 6
Station ID: 2695535 PUBLICATION DATE: 03/09/2004
Name: BER. BIO. STA, ST GEORGES, BERMUDA
NOAA Chart: NONE Latitude: 32° 22.2' N ( 32.37000)
USGS Quad: NONE 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: 13 YEARS
TIME PERIOD: July 1979 - June 1992
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION:
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
HIGHEST OBSERVED WATER LEVEL (09/25/1987) = 1.555
MEAN HIGHER HIGH WATER MHHW = 0.832
MEAN HIGH WATER MHW = 0.752
MEAN SEA LEVEL MSL = 0.389
MEAN TIDE LEVEL MTL = 0.387
MEAN LOW WATER MLW = 0.022
MEAN LOWER LOW WATER MLLW = 0.000
LOWEST OBSERVED WATER LEVEL (03/15/1945) = -0.600
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
5535 H 1978 1.448 0.696
5535 D 1978 1.189 0.437
5535 F 1978 5.813 5.061
5535 G 1978 7.019 6.267
5540 A 1979 13.299 12.547
5540 C 1979 6.280 5.528
4 6.833 6.081
5535 E 1978 3.165 2.413
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 6
Station ID: 2695535 PUBLICATION DATE: 03/09/2004
Name: BER. BIO. STA, ST GEORGES, BERMUDA
NOAA Chart: NONE Latitude: 32° 22.2' N ( 32.37000)
USGS Quad: NONE 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
