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/.