U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 5
PUBLICATION DATE: 02/21/1989
Station ID: 8722670 SUPERCEDED DATE: 04/21/2003
Name: LAKE WORTH PIER, ATLANTIC OCEAN
FLORIDA
NOAA Chart: 11466 Latitude: 26° 36.7' N
USGS Quad: LAKE WORTH Longitude: 80° 2.0' W
To reach the tidal bench marks from the intersection of U.S. Highway 1 and State
Highway 802 in Lake Worth, proceed east on State Highway 802 for 1.45 miles
(2.33 km) to the Lake Worth Fishing Pier. The bench marks are in the vicinity
of the public parking lot at the foot of the pier. The tide gage and staff are
near the offshore end of the pier.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: P 317 1970
MONUMENTATION: Survey Disk VM#: 663
AGENCY: PID#: AD2724
SETTING CLASSIFICATION: Concrete Sea Wall
The bench mark is set flush in a concrete sea wall, 628 feet (191 m) north along
the sea wall from the north side of the Lake Worth Fishing Pier, 247 feet (75 m)
south along the sea wall from a northeasterly jog in the sea wall, 39 feet (12
m) south of the SE corner of a bus stop shelter, 38 feet (12 m) east of the east
face of a two-story building housing shops and restaurants, and 2.4 feet (0.7 m)
north of the north end of the concrete stairs leading down to the beach.
BENCH MARK STAMPING: Q 317 1970
MONUMENTATION: Survey Disk VM#: 661
AGENCY: PID#: AD2721
SETTING CLASSIFICATION: Tower Base
The bench mark is set flush in the top of the NW concrete support base for the
WPBR radio station antenna tower, 550 feet (168 m) SW of the east end of the
Lake Worth Fishing Pier, 78 feet (24 m) south of the east-west entry road, 28
feet (9 m) west of the SW corner of the radio station building, and 1.5 feet
(0.5 m) above ground level.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 5
PUBLICATION DATE: 02/21/1989
Station ID: 8722670 SUPERCEDED DATE: 04/21/2003
Name: LAKE WORTH PIER, ATLANTIC OCEAN
FLORIDA
NOAA Chart: 11466 Latitude: 26° 36.7' N
USGS Quad: LAKE WORTH Longitude: 80° 2.0' W
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: N 317 RESET 1972
MONUMENTATION: Survey Disk VM#: 662
AGENCY: PID#: AD0671
SETTING CLASSIFICATION: Sidewalk
The bench mark is set flush in a concrete sidewalk, in line with the centerline
and 185 feet (56 m) west of the west end of the Lake Worth Fishing Pier, 157
feet (48 m) east of the east side of the main entry road that runs north-south
from the main park entrance, 48.7 feet (14.8 m) SSE of a flagpole, 7.4 feet (2.3
m) SE of a fire hydrant, and 1.1 feet (0.3 m) west of the east end of the
sidewalk.
BENCH MARK STAMPING: NO 1 1973
MONUMENTATION: Survey Disk VM#: 664
AGENCY: PID#: AM7006
SETTING CLASSIFICATION: Concrete Foundation
The bench mark is set flush in the surface of a concrete storm sewer drain cover
at the south end of the public parking lot, 121 feet (37 m) NW of the north leg
of the WPBR radio station antenna tower, 114 feet (35 m) west of the NW corner
of the radio station building, and 13.3 feet (4.1 m) south of the centerline of
the south access road to the parking lot.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 5
PUBLICATION DATE: 02/21/1989
Station ID: 8722670 SUPERCEDED DATE: 04/21/2003
Name: LAKE WORTH PIER, ATLANTIC OCEAN
FLORIDA
NOAA Chart: 11466 Latitude: 26° 36.7' N
USGS Quad: LAKE WORTH Longitude: 80° 2.0' W
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: NO 2 1973
MONUMENTATION: Survey Disk VM#: 665
AGENCY: PID#: AD5810
SETTING CLASSIFICATION: Sidewalk Curb
The bench mark is set flush in the surface of a sidewalk curb, 500 feet (152 m)
north of the north side of the Lake Worth Fishing Pier, 105 feet (32 m) east of
the SE corner of the Lake Worth swimming pool bath house building, 45 feet (14
m) east of the centerline of the roadway along the beach, 25 feet (8 m) west of
the beach sea wall, and 0.3 foot (0.1 m) above ground level.
BENCH MARK STAMPING: R-128 PM BCH 1975
MONUMENTATION: Survey Disk VM#: 666
AGENCY: PID:
SETTING CLASSIFICATION: Concrete Sea Wall
The bench mark is set slightly above the top of the sea wall in front of the
Lake Worth Municipal Swimming Pool, 525 feet (160 m) north of the north side of
the pier, 140 feet (43 m) NE of the SE corner of the pool building, 105 feet (32
m) SSW of Bench Mark P 317 1970, 54 feet (16 m) east of the centerline of the
roadway along the beach, and 18 feet (5 m) SE of Bench Mark NO 2 1973.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 5
PUBLICATION DATE: 02/21/1989
Station ID: 8722670 SUPERCEDED DATE: 04/21/2003
Name: LAKE WORTH PIER, ATLANTIC OCEAN
FLORIDA
NOAA Chart: 11466 Latitude: 26° 36.7' N
USGS Quad: LAKE WORTH Longitude: 80° 2.0' W
T I D A L D A T U M S
Tidal datums at LAKE WORTH PIER, ATLANTIC OCEAN based on:
LENGTH OF SERIES: 4 YEARS
TIME PERIOD: 1974-1977
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 (11/23/1984) = 5.15
MEAN HIGHER HIGH WATER MHHW = 3.13
MEAN HIGH WATER MHW = 2.98
MEAN TIDE LEVEL MTL = 1.57
* NATIONAL GEODETIC VERTICAL DATUM NGVD29 = 1.14
MEAN LOW WATER MLW = 0.16
MEAN LOWER LOW WATER MLLW = 0.00
LOWEST OBSERVED WATER LEVEL (03/28/1971) = -1.47
* NGVD is based on elevations published in Quad 260801, February 1972 and NOS
leveling of 1987.
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In FEET above:
Stamping or Designation MLLW MHW
P 317 1970 19.81 16.83
Q 317 1970 17.79 14.81
N 317 RESET 1972 17.63 14.65
NO 1 1973 7.37 4.39
NO 2 1973 19.68 16.70
R-128 PM BCH 1975 19.62 16.64
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 5
PUBLICATION DATE: 02/21/1989
Station ID: 8722670 SUPERCEDED DATE: 04/21/2003
Name: LAKE WORTH PIER, ATLANTIC OCEAN
FLORIDA
NOAA Chart: 11466 Latitude: 26° 36.7' N
USGS Quad: LAKE WORTH Longitude: 80° 2.0' 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.