U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 4
PUBLICATION DATE: 06/25/1987
Station ID: 8722607 SUPERCEDED DATE: 04/21/2003
Name: PALM BEACH, LAKE WORTH
FLORIDA
NOAA Chart: 11466 Latitude: 26° 44.0' N
USGS Quad: PALM BEACH Longitude: 80° 2.5' W
To reach the tidal bench marks from the east end of Flagler Memorial Bridge,
proceed east on Royal Poinciana Way for 0.15 mile (0.24 km) to Bradley Place, go
north on Bradley Place for 0.55 mile (0.89 km) where it becomes North Lake Way,
continue north on North Lake Way for 0.5 mile (0.8 km) to Tangier Avenue, go
west on Tangier Avenue for 0.05 mile (0.08 km) 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
PRIMARY BENCH MARK STAMPING: W 315 1970
MONUMENTATION: Survey Disk VM#: 5598
AGENCY: PID#: AD2861
SETTING CLASSIFICATION: Concrete Seawall
The bench mark is set in the top of a concrete seawall along the east bank of
the Intracoastal Waterway (Lake Worth), about 654 feet (199 m) north of the
extended centerline of Tangier Avenue, 162.7 feet (49.6 m) north of the
northernmost of two private docks, 13.4 feet (4.1 m) west of the west edge of an
asphalt walkway, and 2 feet (1 m) above the ground level.
BENCH MARK STAMPING: E 310 1970
MONUMENTATION: Survey Disk VM#: 5596
AGENCY: PID#: AD2862
SETTING CLASSIFICATION: Rock Outcrop
The bench mark is set in the top of a rock cut near the SW corner of the Palm
Beach Country Club Golf Course, about 72 feet (22 m) east of the east bank of
the Intracoastal Waterway (Lake Worth), 16 feet (5 m) west of the east end of a
concrete wall which is on top of the rock, 14 feet (4 m) NE of the centerline of
Country Club Road, and 3 feet (1 m) above the road level.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 4
PUBLICATION DATE: 06/25/1987
Station ID: 8722607 SUPERCEDED DATE: 04/21/2003
Name: PALM BEACH, LAKE WORTH
FLORIDA
NOAA Chart: 11466 Latitude: 26° 44.0' N
USGS Quad: PALM BEACH Longitude: 80° 2.5' W
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: V 315 1970
MONUMENTATION: Survey Disk VM#: 5597
AGENCY: PID#: AD2859
SETTING CLASSIFICATION: Concrete Seawall
The bench mark is set in the top of a concrete seawall along the east bank of
the Intracoastal Waterway (Lake Worth), about 210 feet (64 m) north of the
extended centerline of Tangier Avenue, 54.8 feet (16.7 m) south of the
southernmost one of two private docks, 22.4 feet (6.8 m) west of the west edge
of an asphalt walkway, and level with the ground.
BENCH MARK STAMPING: X 315 1970
MONUMENTATION: Survey Disk VM#: 5599
AGENCY: PID#: AD2860
SETTING CLASSIFICATION: Concrete Seawall
The bench mark is set in the top of a concrete seawall along the east bank of
the Intracoastal Waterway (Lake Worth), about 450 feet (137 m) north of the
extended centerline of Tangier Avenue, 87.3 feet (26.6 m) west of the NW corner
of the Episcopalian Church of Bethesda by the Sea, 44.8 feet (13.7 m) south of
the northernmost of two private docks, and 1 foot (0.3 m) above the ground
level.
BENCH MARK STAMPING: F 310 RESET 1972
MONUMENTATION: Survey Disk VM#: 5600
AGENCY: PID#: AD0670
SETTING CLASSIFICATION: Concrete Seawall
The bench mark is set in the top of a concrete seawall along the east bank of
the Intracoastal Waterway (Lake Worth), 112 feet (34 m) south of the extended
centerline of Tangier Avenue and about level with the ground behind the seawall.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 4
PUBLICATION DATE: 06/25/1987
Station ID: 8722607 SUPERCEDED DATE: 04/21/2003
Name: PALM BEACH, LAKE WORTH
FLORIDA
NOAA Chart: 11466 Latitude: 26° 44.0' N
USGS Quad: PALM BEACH Longitude: 80° 2.5' W
T I D A L D A T U M S
Tidal datums at PALM BEACH, LAKE WORTH based on:
LENGTH OF SERIES: 12 MONTHS
TIME PERIOD: MAY 1970 - APRIL 1971
TIDAL EPOCH: 1960-1978
CONTROL TIDE STATION: 8723170 MIAMI BEACH
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in FEET:
HIGHEST OBSERVED WATER LEVEL (10/14/1970) = 4.39
MEAN HIGHER HIGH WATER MHHW = 3.14
MEAN HIGH WATER MHW = 2.93
MEAN TIDE LEVEL MTL = 1.56
* NATIONAL GEODETIC VERTICAL DATUM NGVD29 = 1.31
MEAN LOW WATER MLW = 0.19
MEAN LOWER LOW WATER MLLW = 0.00
LOWEST OBSERVED WATER LEVEL (04/24/1970) = -0.89
* NGVD is based on elevations published in Quad 260801, 2/72 and NOS leveling
of 1981.
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In FEET above:
Stamping or Designation MLLW MHW
W 315 1970 6.01 3.08
E 310 1970 9.76 6.83
V 315 1970 4.48 1.55
X 315 1970 5.89 2.96
F 310 RESET 1972 4.43 1.50
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 4
PUBLICATION DATE: 06/25/1987
Station ID: 8722607 SUPERCEDED DATE: 04/21/2003
Name: PALM BEACH, LAKE WORTH
FLORIDA
NOAA Chart: 11466 Latitude: 26° 44.0' N
USGS Quad: PALM BEACH Longitude: 80° 2.5' W
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 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.