U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 8 Station ID: 8722607 PUBLICATION DATE: 06/13/2003 Name: PALM BEACH FL NOAA Chart: 11466 Latitude: 26° 44.0' N ( 26.73330) USGS Quad: PALM BEACH Longitude: 80° 2.5' W ( -80.04170) To reach the tidal bench marks from the east end of Flagler Memorial Bridge, proceed east on Royal Poinciana Way for 0.2 km (0.2 mi) to Bradley Place, go north on Bradley Place for 0.9 km (0.6 mi) where it becomes North Lake Way, continue north on North Lake Way for 0.8 km (0.5 mi) to Tangier Avenue, go west on Tangier Avenue for 0.08 km (0.05 mi) to its end. The bench marks are located on a seawall north and south of Tangier Avenue. The tide gage and staff were located on a pier in the vicinity of Ducks Nest Historical House. T I D A L B E N C H M A R K S
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 8 Station ID: 8722607 PUBLICATION DATE: 06/13/2003 Name: PALM BEACH FL NOAA Chart: 11466 Latitude: 26° 44.0' N ( 26.73330) USGS Quad: PALM BEACH Longitude: 80° 2.5' W ( -80.04170) T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: W 315 1970 DESIGNATION: W 315 MONUMENTATION: Bench Mark disk VM#: 5598 AGENCY: National Geodetic Survey (NGS) IDB PID#: AD2861 SETTING CLASSIFICATION: Concrete sea wall OPUS PID: LATITUDE: 26° 44.1' N ( 26.73500) LONGITUDE: 80° 2.5' W ( -80.04170) The primary bench mark is a disk set in the top of a concrete seawall along the east bank of the Intracoastal Waterway (Lake Worth), 199 m (654 ft) north of the extended centerline of Tangier Avenue, 49.59 m (162.7 ft) north of the northernmost of two private docks, 4.08 m (13.4 ft) west of the west edge of an asphalt walkway, and 1 m (2 ft) above the ground level.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 8 Station ID: 8722607 PUBLICATION DATE: 06/13/2003 Name: PALM BEACH FL NOAA Chart: 11466 Latitude: 26° 44.0' N ( 26.73330) USGS Quad: PALM BEACH Longitude: 80° 2.5' W ( -80.04170) T I D A L B E N C H M A R K S BENCH MARK STAMPING: E 310 1970 DESIGNATION: E 310 MONUMENTATION: Bench Mark disk VM#: 5596 AGENCY: National Geodetic Survey (NGS) IDB PID#: AD2862 SETTING CLASSIFICATION: Rock outcrop OPUS PID: LATITUDE: 26° 44.5' N ( 26.74170) LONGITUDE: 80° 2.5' W ( -80.04170) The bench mark is a disk set in the top of a rock cut near the SW corner of the Palm Beach Country Club Golf Course, 22 m (72 ft) east of the east bank of the Intracoastal Waterway (Lake Worth), 5 m (16 ft) west of the east end of a concrete wall which is on top of the rock, 4 m (14 ft) NE of the centerline of Country Club Road, and 1 m (3 ft) above the road level.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 8 Station ID: 8722607 PUBLICATION DATE: 06/13/2003 Name: PALM BEACH FL NOAA Chart: 11466 Latitude: 26° 44.0' N ( 26.73330) USGS Quad: PALM BEACH Longitude: 80° 2.5' W ( -80.04170) T I D A L B E N C H M A R K S BENCH MARK STAMPING: V 315 1970 DESIGNATION: V 315 MONUMENTATION: Bench Mark disk VM#: 5597 AGENCY: National Geodetic Survey (NGS) IDB PID#: AD2859 SETTING CLASSIFICATION: Concrete sea wall OPUS PID: LATITUDE: 26° 44.0' N ( 26.73330) LONGITUDE: 80° 2.5' W ( -80.04170) The bench mark is a disk set in the top of a concrete seawall along the east bank of the Intracoastal Waterway (Lake Worth), 64 m (210 ft) north of the extended centerline of Tangier Avenue, 16.70 m (54.8 ft) south of the southernmost one of two private docks, 6.83 m ( 22.4 ft) west of the west edge of an asphalt walkway.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 8 Station ID: 8722607 PUBLICATION DATE: 06/13/2003 Name: PALM BEACH FL NOAA Chart: 11466 Latitude: 26° 44.0' N ( 26.73330) USGS Quad: PALM BEACH Longitude: 80° 2.5' W ( -80.04170) T I D A L B E N C H M A R K S BENCH MARK STAMPING: X 315 1970 DESIGNATION: X 315 MONUMENTATION: Bench Mark disk VM#: 5599 AGENCY: National Geodetic Survey (NGS) IDB PID#: AD2860 SETTING CLASSIFICATION: Concrete sea wall OPUS PID: LATITUDE: 26° 44.0' N ( 26.73330) LONGITUDE: 80° 2.5' W ( -80.04170) The bench mark is a disk set in the top of a concrete seawall along the east bank of the Intracoastal Waterway (Lake Worth), 137 m (450 ft) north of the extended centerline of Tangier Avenue, 26.61 m (87.3 ft) west of the NW corner of the Episcopalian Church of Bethesda by the Sea, 15 m (50 ft) north of the extended centerline of the walkway to the historic church, 13.66 m (44.8 ft) south of the northernmost of two private docks, and 0.3 m (1 ft) above the ground level.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 6 of 8 Station ID: 8722607 PUBLICATION DATE: 06/13/2003 Name: PALM BEACH FL NOAA Chart: 11466 Latitude: 26° 44.0' N ( 26.73330) USGS Quad: PALM BEACH Longitude: 80° 2.5' W ( -80.04170) T I D A L B E N C H M A R K S BENCH MARK STAMPING: F 310 RESET 1972 DESIGNATION: F 310 RESET 1972 MONUMENTATION: Bench Mark disk VM#: 5600 AGENCY: National Geodetic Survey (NGS) IDB PID#: AD0670 SETTING CLASSIFICATION: Concrete sea wall OPUS PID: LATITUDE: 26° 44.0' N ( 26.73330) LONGITUDE: 80° 2.5' W ( -80.04170) The bench mark is a disk set in the top of a concrete seawall along the east bank of the Intracoastal Waterway (Lake Worth), 31 m (102 ft) south of the extended centerline of Tangier Avenue and level with the ground behind the seawall.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 7 of 8 Station ID: 8722607 PUBLICATION DATE: 06/13/2003 Name: PALM BEACH FL NOAA Chart: 11466 Latitude: 26° 44.0' N ( 26.73330) USGS Quad: PALM BEACH Longitude: 80° 2.5' W ( -80.04170) T I D A L D A T U M S Tidal datums at PALM BEACH based on: LENGTH OF SERIES: 1 YEAR TIME PERIOD: May 1970 - April 1971 TIDAL EPOCH: 1983-2001 CONTROL TIDE STATION: 8723170 MIAMI BEACH (CITY PIER) Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS: HIGHEST OBSERVED WATER LEVEL (10/14/1979) = 1.279 MEAN HIGHER HIGH WATER MHHW = 0.936 MEAN HIGH WATER MHW = 0.876 North American Vertical Datum NAVD88 = 0.805 MEAN SEA LEVEL MSL = 0.470 MEAN TIDE LEVEL MTL = 0.466 MEAN LOW WATER MLW = 0.056 MEAN LOWER LOW WATER MLLW = 0.000 LOWEST OBSERVED WATER LEVEL (04/25/1971) = -0.327 North American Vertical Datum (NAVD88) Bench Mark Elevation Information In METERS above: Stamping or Designation MLLW MHW W 315 1970 1.773 0.897 E 310 1970 2.916 2.040 V 315 1970 1.307 0.431 X 315 1970 1.736 0.860 F 310 RESET 1972 1.292 0.416
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 8 of 8 Station ID: 8722607 PUBLICATION DATE: 06/13/2003 Name: PALM BEACH FL NOAA Chart: 11466 Latitude: 26° 44.0' N ( 26.73330) USGS Quad: PALM BEACH Longitude: 80° 2.5' W ( -80.04170) 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.