U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 6 Station ID: 8722654 PUBLICATION DATE: 12/08/2010 Name: WEST PALM BEACH FL NOAA Chart: 11466 Latitude: 26° 38.7' N ( 26.64500) USGS Quad: PALM BEACH Longitude: 80° 2.7' W ( -80.04500) To reach the tidal bench marks from the U.S. Highway 1 (South Dixie Highway) bridge over the West Palm Beach Canal, proceed north on U.S. Highway 1 for 0.16 km (0.1 mi) to Gregory Road, then turn right and proceed east on Gregory Road for 1.13 km (0.7 mi) to its end at Flagler Drive, then turn right and proceed south on Flagler Drive for 0.08 km (0.05 mi) to its end at Arlington Place, then turn left and proceed east on Arlington Place for 0.08 km (0.05 mi) to the intersection with Flagler Court. The bench marks are located on Flagler Court, Arlington Court, the bulkhead fronting the Intracoastal Waterway, and in the vicinity of the railroad tracks. The tide gage and staff were located at 8020 Flagler Court. T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: NO 3 1970 DESIGNATION: 872 2654 TIDAL 3 MONUMENTATION: Tidal Station disk VM#: 5608 AGENCY: US Coast and Geodetic Survey (USC&GS) IDB PID#: AD2798 SETTING CLASSIFICATION: Concrete sidewalk OPUS PID: LATITUDE: 26° 38.7' N ( 26.64500) LONGITUDE: 80° 2.7' W ( -80.04500) The primary bench mark is a disk set on the top of the west concrete sidewalk along Flagler Court, near the north edge of the West Palm Beach Canal and east side of the Intracoastal Waterway, between bench mark No 2 1970 and 4 described, 102.84 m (337.4 ft) south of bench mark No 3 1970 described, 38.01 m (124.7 ft) north of and across Arlington Place from TIDAL 2 described, 5.49 m (18.0 ft) west of the center line of Flagler Court and . NOTE: West Palm Beach Canal gauge.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 6 Station ID: 8722654 PUBLICATION DATE: 12/08/2010 Name: WEST PALM BEACH FL NOAA Chart: 11466 Latitude: 26° 38.7' N ( 26.64500) 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: NO 2 1970 DESIGNATION: 872 2654 TIDAL 2 MONUMENTATION: Tidal Station disk VM#: 5607 AGENCY: US Coast and Geodetic Survey (USC&GS) IDB PID#: AD2795 SETTING CLASSIFICATION: Concrete sidewalk OPUS PID: LATITUDE: 26° 38.7' N ( 26.64500) LONGITUDE: 80° 2.7' W ( -80.04500) The bench mark is a disk set on the top of the south concrete sidewalk along Arlington Court at the junction of Arlington Place and Flagler Court, near the junction of the West Palm Beach Canal at the Intracoastal Waterway, 5.49 m (18.0 ft) south of the center line of Arlington Place, 7.01 m (23.0 ft) west of the extended center line of Flagler Court leading north, 5.79 m (19.0 ft) west of the center line of a concrete driveway leading to a residence at 8026 Arlington Place and 0.15 m (0.5 ft) above the level of the court. BENCH MARK STAMPING: NO 4 1970 DESIGNATION: 872 2654 TIDAL 4 MONUMENTATION: Tidal Station disk VM#: 5609 AGENCY: US Coast and Geodetic Survey (USC&GS) IDB PID#: AD2800 SETTING CLASSIFICATION: Concrete sidewalk OPUS PID: LATITUDE: 26° 38.8' N ( 26.64670) LONGITUDE: 80° 2.7' W ( -80.04500) The bench mark is a disk set 102.87 m (337.5 ft) north of bench mark No 3 1970 described, 73.76 m (242.0 ft) east along Flagler Court from the center of the junction of Flagler Court and Flagler Drive, 5.49 m (18.0 ft) west of the center line of Flagler Court, set on the top of the concrete sidewalk of Flagler Court and 0.15 m (0.5 ft) above the level of the street.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 6 Station ID: 8722654 PUBLICATION DATE: 12/08/2010 Name: WEST PALM BEACH FL NOAA Chart: 11466 Latitude: 26° 38.7' N ( 26.64500) 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: 2654 F 1986 DESIGNATION: 872 2654 F TIDAL MONUMENTATION: Tidal Station disk VM#: 15818 AGENCY: National Ocean Service (NOS) IDB PID#: AD8074 SETTING CLASSIFICATION: Concrete sidewalk OPUS PID: LATITUDE: 26° 38.8' N ( 26.64670) LONGITUDE: 80° 2.8' W ( -80.04670) The bench mark is a disk set in the top of a concrete sidewalk of Flagler Court, 25.91 m (85.0 ft) east of the centerline of Flagler Drive, 6.10 m (20.0 ft) ESE of the SW fence corner at house #7850 Flagler Drive, and 4.57 m (15.0 ft) north of the centerline of Flagler Court. BENCH MARK STAMPING: 3205 1969 JAX FLA DESIGNATION: 3205 FCE USE MONUMENTATION: Survey disk VM#: 18770 AGENCY: US Army Corps of Engineers (USE) IDB PID#: AD2797 SETTING CLASSIFICATION: Concrete Monument OPUS PID: LATITUDE: 26° 38.7' N ( 26.64500) LONGITUDE: 80° 2.7' W ( -80.04500) The bench mark is a disk set in the top of a concrete post which is partly connected to the bulkhead and 0.76 m (2.5 ft) west of the east face of the bulkhead, located on the property of 8020 Flagler Court at the 45 degree bend in the sea wall, near the NW junction of the Intracoastal Waterway and the West Palm Beach Canal leading westerly, and 2.90 m (9.5 ft) north of the steel pipe for the floatwell for tide gauge.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 6 Station ID: 8722654 PUBLICATION DATE: 12/08/2010 Name: WEST PALM BEACH FL NOAA Chart: 11466 Latitude: 26° 38.7' N ( 26.64500) 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: M 402 1991 DESIGNATION: M 402 MONUMENTATION: Vertical Control disk VM#: 18771 AGENCY: National Geodetic Survey (NGS) IDB PID#: AD8033 SETTING CLASSIFICATION: Bridge Abutment OPUS PID: LATITUDE: 26° 38.7' N ( 26.64500) LONGITUDE: 80° 3.4' W ( -80.05667) The bench mark is a disk set in the west end of the bridge seat of the north concrete abutment of the highway bridge spanning the canal, located at the intersection of West Palm Beach Canal and Dixie Highway, 11.80 m (38.7 ft) west of the highway centerline, 3.11 m (10.2 ft) south of the north end of the west bridge rail, and 1.31 m (4.3 ft) below the level of the highway.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 6 Station ID: 8722654 PUBLICATION DATE: 12/08/2010 Name: WEST PALM BEACH FL NOAA Chart: 11466 Latitude: 26° 38.7' N ( 26.64500) 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 WEST PALM BEACH based on: LENGTH OF SERIES: 1 YEAR TIME PERIOD: January 1971 - December 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 (11/05/1971) = 1.281 MEAN HIGHER HIGH WATER MHHW = 0.854 MEAN HIGH WATER MHW = 0.801 North American Vertical Datum NAVD88 = 0.769 MEAN TIDE LEVEL MTL = 0.426 MEAN SEA LEVEL MSL = 0.415 MEAN LOW WATER MLW = 0.050 MEAN LOWER LOW WATER MLLW = 0.000 LOWEST OBSERVED WATER LEVEL (02/10/1971) = -0.237 North American Vertical Datum (NAVD88) Bench Mark Elevation Information In METERS above: Stamping or Designation MLLW MHW NO 3 1970 1.607 0.806 NO 2 1970 1.677 0.876 NO 4 1970 1.716 0.915 2654 F 1986 1.693 0.892 3205 1969 JAX FLA 1.736 0.935 M 402 1991 4.904 4.104 Foot Notes: Geodetic heights of the bench marks meet all NOAA/NOS/NGS quality control standards for Second Order, Class 1 leveling. It is advised that a confirmation set of levels be established for bench marks 3205 1969 JAX FLA and M 402 1991 to verify height differences before using tidal bench mark elevation information.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 6 of 6 Station ID: 8722654 PUBLICATION DATE: 12/08/2010 Name: WEST PALM BEACH FL NOAA Chart: 11466 Latitude: 26° 38.7' N ( 26.64500) 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.