U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 6 Station ID: 2695535 PUBLICATION DATE: 06/03/2020 Name: BER. BIO. STA, ST GEORGES, 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#: BBDP99 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: 06/03/2020 Name: BER. BIO. STA, ST GEORGES, 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: 06/03/2020 Name: BER. BIO. STA, ST GEORGES, 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: 06/03/2020 Name: BER. BIO. STA, ST GEORGES, 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: 06/03/2020 Name: BER. BIO. STA, ST GEORGES, 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: 2 YEARS TIME PERIOD: July 2017 - June 2019 TIDAL EPOCH: 0000-0000 CONTROL TIDE STATION: Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS: HIGHEST OBSERVED WATER LEVEL (09/25/1987) = 1.461 MEAN HIGHER HIGH WATER MHHW = 0.839 MEAN HIGH WATER MHW = 0.766 MEAN SEA LEVEL MSL = 0.396 MEAN TIDE LEVEL MTL = 0.394 MEAN LOW WATER MLW = 0.021 MEAN LOWER LOW WATER MLLW = 0.000 LOWEST OBSERVED WATER LEVEL (05/05/1985) = -0.532 Bench Mark Elevation Information In METERS above: Stamping or Designation MLLW MHW 5540 A 1979 13.208 12.442 5535 D 1978 3.695 2.929 5535 F 1978 5.719 4.953 5540 C 1979 6.188 5.422 4 6.740 5.974 5535 E 1978 7.019 6.253 5540 K 2016 5.736 4.970 5540 J 2016 2.191 1.425
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 6 of 6 Station ID: 2695535 PUBLICATION DATE: 06/03/2020 Name: BER. BIO. STA, ST GEORGES, 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/.