U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 5 Station ID: 8722621 PUBLICATION DATE: 03/08/2009 Name: PALM BEACH, BRAZILIAN DOCK, FL NOAA Chart: 11466 Latitude: 26° 42.3' N ( 26.70500) USGS Quad: PALM BEACH Longitude: 80° 2.7' W ( -80.04500) To reach the tidal bench marks from the east end of the Royal Palm Bridge (center of three bridges to Palm Beach) proceed 0.80 km (0.5 mi) east on Royal Palm Way to the junction of Lake Drive, then 0.16 km (0.1 mi) south on Lake Drive to the junction of Brazilian Avenue and the entrance to Brazilian Dock. The bench marks are in the area between Royal Palm Way and Brazilian Dock. The tide gage and staff were located on the dock. T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: A 2621 1976 DESIGNATION: 872 2621 A TIDAL MONUMENTATION: Tidal Station disk VM#: 5603 AGENCY: National Ocean Survey (NOS) IDB PID#: AD5809 SETTING CLASSIFICATION: Concrete sea wall OPUS PID: LATITUDE: 26° 42.3' N ( 26.70500) LONGITUDE: 80° 2.7' W ( -80.04500) The primary bench mark is a disk set in a concrete retaining wall along the east bank of the Intracoastal Waterway, 128.90 m (422.9 ft) south of the highway centerline, 40.69 m (133.5 ft) south of bench mark A 2621 1976, 9.39 m (30.8 ft) north of the NE corner of the Brazilian dock masters office, and 6.19 m (20.3 ft) east of and level with the center of a paved path.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 5 Station ID: 8722621 PUBLICATION DATE: 03/08/2009 Name: PALM BEACH, BRAZILIAN DOCK, FL NOAA Chart: 11466 Latitude: 26° 42.3' N ( 26.70500) USGS Quad: PALM BEACH Longitude: 80° 2.7' W ( -80.04500) T I D A L B E N C H M A R K S BENCH MARK STAMPING: E 233 1965 DESIGNATION: E 233 MONUMENTATION: Bench Mark disk VM#: 5602 AGENCY: US Coast and Geodetic Survey (USC&GS) IDB PID#: AD2823 SETTING CLASSIFICATION: Concrete abutment OPUS PID: LATITUDE: 26° 42.3' N ( 26.70500) LONGITUDE: 80° 2.6' W ( -80.04330) The bench mark is a disk set flush on the top center of the SE concrete abutment of Royal Palm Bridge, 9.60 m (31.5 ft) south of the centerline of the bridge, 2.23 m (7.3 ft) west of the east end of the SE abutment, and 1.01 m (3.3 ft) above the sidewalk. BENCH MARK STAMPING: B 2621 1976 DESIGNATION: 872 2621 B TIDAL MONUMENTATION: Tidal Station disk VM#: 5604 AGENCY: National Ocean Survey (NOS) IDB PID#: AD5808 SETTING CLASSIFICATION: Concrete Retaining Wall OPUS PID: LATITUDE: 26° 42.3' N ( 26.70500) LONGITUDE: 80° 2.7' W ( -80.04500) The bench mark is a disk set in a concrete retaining wall along the east bank of the Intracoastal Waterway, 88.21 m (289.4 ft) south of the highway centerline, 45.29 m (148.6 ft) south of bench mark C 26211976, 40.69 m (133.5 ft) north of bench mark A 2621 1976, and 6.19 m (20.3 ft) east of and level with the center of a paved path.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 5 Station ID: 8722621 PUBLICATION DATE: 03/08/2009 Name: PALM BEACH, BRAZILIAN DOCK, FL NOAA Chart: 11466 Latitude: 26° 42.3' N ( 26.70500) USGS Quad: PALM BEACH Longitude: 80° 2.7' W ( -80.04500) T I D A L B E N C H M A R K S BENCH MARK STAMPING: C 2621 1976 DESIGNATION: 872 2621 C TIDAL MONUMENTATION: Tidal Station disk VM#: 5605 AGENCY: National Ocean Survey (NOS) IDB PID#: AD5807 SETTING CLASSIFICATION: Concrete sea wall OPUS PID: LATITUDE: 26° 42.3' N ( 26.70500) LONGITUDE: 80° 2.7' W ( -80.04500) The bench mark is a disk set in a concrete retaining wall along the east bank of the Intracoastal Waterway, 45.29 m (148.6 ft) north of bench mark B 2621 1976, 42.89 m (140.7 ft) south of the highway centerline, 33.31 m (109.3 ft) south of bench mark E 233 1965, and 6.19 m (20.3 ft) west of and level with the center of a paved path. BENCH MARK STAMPING: E2621 1976 DESIGNATION: 872 2621 E TIDAL MONUMENTATION: Tidal Station disk VM#: 5606 AGENCY: National Ocean Survey (NOS) IDB PID#: AD5806 SETTING CLASSIFICATION: Concrete abutment OPUS PID: LATITUDE: 26° 42.4' N ( 26.70670) LONGITUDE: 80° 2.7' W ( -80.04500) The bench mark is a disk set flush on the top center of the NE concrete abutment of Royal Palm Bridge, 9.60 m (31.5 ft) north of the centerline of the bridge, 2.26 m (7.4 ft) west of the east end of the NE abutment, and 1.01 m (3.3 ft) above the sidewalk.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 5 Station ID: 8722621 PUBLICATION DATE: 03/08/2009 Name: PALM BEACH, BRAZILIAN DOCK, FL NOAA Chart: 11466 Latitude: 26° 42.3' N ( 26.70500) USGS Quad: PALM BEACH Longitude: 80° 2.7' W ( -80.04500) T I D A L D A T U M S Tidal datums at PALM BEACH, BRAZILIAN DOCK, based on: LENGTH OF SERIES: 10 YEARS TIME PERIOD: January 1977 - December 1986 TIDAL EPOCH: 1983-2001 CONTROL TIDE STATION: 8724580 KEY WEST Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS: HIGHEST OBSERVED WATER LEVEL (11/23/1984) = 1.531 MEAN HIGHER HIGH WATER MHHW = 0.887 MEAN HIGH WATER MHW = 0.830 North American Vertical Datum NAVD88 = 0.735 MEAN TIDE LEVEL MTL = 0.439 MEAN SEA LEVEL MSL = 0.431 MEAN LOW WATER MLW = 0.047 MEAN LOWER LOW WATER MLLW = 0.000 LOWEST OBSERVED WATER LEVEL (03/18/1980) = -0.380 North American Vertical Datum (NAVD88) Bench Mark Elevation Information In METERS above: Stamping or Designation MLLW MHW A 2621 1976 1.718 0.888 E 233 1965 4.523 3.693 B 2621 1976 1.717 0.887 C 2621 1976 1.705 0.875 E2621 1976 4.528 3.698
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 5 Station ID: 8722621 PUBLICATION DATE: 03/08/2009 Name: PALM BEACH, BRAZILIAN DOCK, FL NOAA Chart: 11466 Latitude: 26° 42.3' N ( 26.70500) USGS Quad: PALM BEACH Longitude: 80° 2.7' W ( -80.04500) 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 the fixed datums of North American Vertical Datum of 1988 (NAVD88). NAVD88 is a fixed datum derived from a simultaneous, least squares, minimum constraint adjustment of Canadian/Mexican/United States leveling observations. Local mean sea level observed at Father Point/Rimouski, Canada was held fixed as the single initial constraint. NAVD88 replaces NGVD29 as the national standard geodetic reference for heights. Bench mark elevations relative to NAVD88 are available from NGS through the World Wide Web at National Geodetic Survey. NGVD29 is a fixed datum adopted as a national standard geodetic reference for heights but is now considered superseded. NGVD29 is sometimes referred to as Sea Level Datum of 1929 or as Mean Sea Level on some early issues of Geological Survey Topographic Quads. NGVD29 was originally derived from a general adjustment of the first-order leveling networks of the U.S. and Canada after holding mean sea level observed at 26 long term tide stations as fixed. Numerous local and wide-spread adjustments have been made since establishment in 1929. Bench mark elevations relative to NGVD29 are available from the National Geodetic Survey (NGS) data base via the World Wide Web at National Geodetic Survey. NAVD88 and NGVD29 are fixed geodetic datums whose elevation relationships 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/. The NAVD88 elevation is shown on the Elevations of Tidal Datums Table Referred to MLLW only when two or more of the bench marks listed have NAVD88 elevations. The NAVD88 elevation relationship shown in the table is derived from an average of several bench mark elevations relative to tide station datum. As a result of this averaging, NAVD88 bench mark elevations computed indirectly from the tidal datums elevation table may differ slightly from NAVD88 elevations listed for each bench mark in the NGS database.