U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 4
PUBLICATION DATE: 03/15/1989
Station ID: 8722951 SUPERCEDED DATE: 04/21/2003
Name: PORT EVERGLADES, TURNING BASIN
FLORIDA
NOAA Chart: 11470 Latitude: 26° 5.5' N
USGS Quad: PORT EVERGLADES Longitude: 80° 7.4' W
To reach the tidal bench marks from the intersection of SE 6th Avenue and SW
24th Street in Port Everglades, proceed east on SW 24th Street for 0.74 mile
(1.19 km) to Eisenhower Boulevard and the port facilities. The bench marks are
located in the vicinity of the Customs House and slip No. 1. The tide gage and
staff were located at the west end of slip No. 1.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: NO 4 1934
MONUMENTATION: Survey Disk VM#: 5699
AGENCY: PID#: AD2443
SETTING CLASSIFICATION: Concrete Retaining Wall
The bench mark is set vertically in the retaining wall on the north side of slip
No. 1, 286 feet (87 m) east of the centerline of Eisenhower Boulevard, 9.9 feet
(3.0 m) east of the west end of the retaining wall, 9 feet (3 m) north of a
shed, 1.3 feet (0.4 m) below the top of the retaining wall, and 1.7 feet (0.5 m)
above the ground.
BENCH MARK STAMPING: TIDAL 2 RESET 1936
MONUMENTATION: Survey Disk VM#: 5700
AGENCY: PID#: AD2444
SETTING CLASSIFICATION: Concrete Sea Wall
The bench mark is set in the top of a concrete sea wall at the SW corner of slip
No. 1, 242 feet (74 m) SW of bench mark TIDAL 3 RESET 1936, about 73 feet (22 m)
south of the extended centerline of SW 24th Street, 4.4 feet (1.3 m) SW of the
SW corner of the raised part of the sea wall, and about level with the ground.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 4
PUBLICATION DATE: 03/15/1989
Station ID: 8722951 SUPERCEDED DATE: 04/21/2003
Name: PORT EVERGLADES, TURNING BASIN
FLORIDA
NOAA Chart: 11470 Latitude: 26° 5.5' N
USGS Quad: PORT EVERGLADES Longitude: 80° 7.4' W
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: TIDAL 3 RESET 1936
MONUMENTATION: Survey Disk VM#: 5701
AGENCY: PID#: AD2445
SETTING CLASSIFICATION: Concrete Retaining Wall
The bench mark is set in the top of a retaining wall on the north side of slip
NO. 1, 277 feet (84 m) east of the centerline of Eisenhower Boulevard, 17 feet
(5 m) NW of the NE corner of a shed, 9.5 feet (2.9 m) NE of the NW corner of a
bathhouse, and about level with the ground.
BENCH MARK STAMPING: F 239 1965
MONUMENTATION: Survey Disk VM#: 5702
AGENCY: PID#: AD2480
SETTING CLASSIFICATION: Concrete Foundation
The bench mark is set in the top of a concrete pedestal that forms the east side
of the front steps to the Customs House at Port Everglades, 56 feet (17 m)
south of the centerline of SW 24th Street, 33 feet (10 m) east of the flagpole
in front of the Customs House, 10 feet (3 m) east of the centerline of the main
entrance at the north side of the building, 6 feet (2 m) north of the north face
of the building, and 2.6 feet (0.8 m) above the sidewalk.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 4
PUBLICATION DATE: 03/15/1989
Station ID: 8722951 SUPERCEDED DATE: 04/21/2003
Name: PORT EVERGLADES, TURNING BASIN
FLORIDA
NOAA Chart: 11470 Latitude: 26° 5.5' N
USGS Quad: PORT EVERGLADES Longitude: 80° 7.4' W
T I D A L D A T U M S
Tidal datums at PORT EVERGLADES, TURNING BASIN based on:
LENGTH OF SERIES: 2 YEARS
TIME PERIOD: JUNE 1971 - MAY 1973
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 (10/25/1973) = 4.60
MEAN HIGHER HIGH WATER MHHW = 2.87
MEAN HIGH WATER MHW = 2.75
MEAN TIDE LEVEL MTL = 1.46
* NATIONAL GEODETIC VERTICAL DATUM NGVD29 = 0.95
MEAN LOW WATER MLW = 0.17
MEAN LOWER LOW WATER MLLW = 0.00
LOWEST OBSERVED WATER LEVEL (04/26/1971) = -1.09
* NGVD is based on elevations published in Quad 260802, March 1972, and NOS
leveling of 1982.
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In FEET above:
Stamping or Designation MLLW MHW
NO 4 1934 6.47 3.72
TIDAL 2 RESET 1936 6.24 3.49
TIDAL 3 RESET 1936 7.89 5.14
F 239 1965 10.65 7.90
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 4
PUBLICATION DATE: 03/15/1989
Station ID: 8722951 SUPERCEDED DATE: 04/21/2003
Name: PORT EVERGLADES, TURNING BASIN
FLORIDA
NOAA Chart: 11470 Latitude: 26° 5.5' N
USGS Quad: PORT EVERGLADES Longitude: 80° 7.4' 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.