U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 5
Station ID: 8723769 PUBLICATION DATE: 02/26/2004
Name: PLANTATION KEY, ATLANTIC SIDE
FL
NOAA Chart: 11463 Latitude: 24° 58.4' N ( 24.97330)
USGS Quad: PLANTATION KEY Longitude: 80° 33.0' W ( -80.55000)
To reach the tidal bench marks from Coral Shores High School on U.S. Highway 1
in Plantation, proceed 1.6 km (1.0 mi) SW on U.S. Highway 1 to Schooner Bay
Road, then turn left and proceed SE on Schooner Bay Road for 0.08 km (0.05 mi)
to Freeland Road (Old U.S. Highway 1), then turn right and proceed SW on
Freeland Raod for 1.1 km (0.7 mi) to Aregood Lane, then turn left and proceed SE
on Aregood Lane for 0.3 km (0.2 mi) to its end at a private residence. The
bench marks are located in the area around the private residence and along
Freeland Road. The tide gage and staff were located on a pier member at the
private residence.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: NO 1 1975
DESIGNATION: 872 3769 TIDAL 1
MONUMENTATION: Tidal Station disk VM#: 6025
AGENCY: National Ocean Survey (NOS) IDB PID#: AA0928
SETTING CLASSIFICATION: Concrete patio OPUS PID:
LATITUDE: 24° 58.4' N ( 24.97330) LONGITUDE: 80° 33.1' W ( -80.55170)
The primary bench mark is a disk set in the concrete patio adjoining the north
basin sea wall, 28 m (93 ft) east of the east corner of the house, and 0.76 m
(2.5 ft) SW of the north edge of the patio.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 5
Station ID: 8723769 PUBLICATION DATE: 02/26/2004
Name: PLANTATION KEY, ATLANTIC SIDE
FL
NOAA Chart: 11463 Latitude: 24° 58.4' N ( 24.97330)
USGS Quad: PLANTATION KEY Longitude: 80° 33.0' W ( -80.55000)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: NO 2 1975
DESIGNATION: 872 3769 TIDAL 2
MONUMENTATION: Tidal Station disk VM#: 6026
AGENCY: National Ocean Survey (NOS) IDB PID#: AA0927
SETTING CLASSIFICATION: Concrete base OPUS PID:
LATITUDE: 24° 58.4' N ( 24.97330) LONGITUDE: 80° 33.1' W ( -80.55170)
The bench mark is a disk set flush in a concrete base used as a boat davit, 17 m
(55 ft) SW of bench mark NO 1 1975, 1.68 m (5.5 ft) east of a utility shed, 1.46
m (4.8 ft) NE of the boat ramp, and 1 m (2 ft) above ground.
BENCH MARK STAMPING: 3769 D 1982
DESIGNATION: 872 3769 D TIDAL
MONUMENTATION: Tidal Station disk VM#: 6028
AGENCY: National Ocean Survey (NOS) IDB PID#: AA0925
SETTING CLASSIFICATION: Concrete foundation OPUS PID:
LATITUDE: 24° 58.5' N ( 24.97500) LONGITUDE: 80° 33.2' W ( -80.55330)
The bench mark is a disk set in a concrete foundation, 0.2 km (0.1 mi) NE of
bench mark 3769 F 1982, 9.30 m (30.5 ft) SE of a chainlink fence, 4.57 m (15.0
ft) NW of the centerline of Freeland Road, and 0.76 m (2.5 ft) south of the
center of a manhole.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 5
Station ID: 8723769 PUBLICATION DATE: 02/26/2004
Name: PLANTATION KEY, ATLANTIC SIDE
FL
NOAA Chart: 11463 Latitude: 24° 58.4' N ( 24.97330)
USGS Quad: PLANTATION KEY Longitude: 80° 33.0' W ( -80.55000)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 3769 E 1982
DESIGNATION: 872 3769 E TIDAL
MONUMENTATION: Tidal Station disk VM#: 6029
AGENCY: National Ocean Survey (NOS) IDB PID#: AA0929
SETTING CLASSIFICATION: Concrete foundation OPUS PID:
LATITUDE: 24° 58.2' N ( 24.97000) LONGITUDE: 80° 33.4' W ( -80.55670)
The bench mark is a disk set in a concrete foundation, 0.2 km (0.1 mi) SW of
bench mark 3769 F 1982, 26 m (84 ft) NNW of a power pole, 5.58 m (18.3 ft) NW of
the centerline of Freeland Road, and 0.82 m (2.7 ft) WSW of the center of a
manhole cover.
BENCH MARK STAMPING: 3769 F 1982
DESIGNATION: 872 3769 F TIDAL
MONUMENTATION: Bench Mark disk VM#: 6030
AGENCY: Florida Department of Natural Resources
(FDNR) IDB PID#: AA0926
SETTING CLASSIFICATION: Concrete foundation OPUS PID:
LATITUDE: 24° 58.4' N ( 24.97330) LONGITUDE: 80° 33.2' W ( -80.55330)
The bench mark is a disk set in the NE corner of a 4 m x 3 m (12 ft x 11 ft)
concrete foundation, 12 m (39 ft) WSW of the intersection of Freeland Road, 8.53
m (28.0 ft) east of the south corner of a chainlink fence, and 4.27 m (14.0 ft)
NW of the centerline of Freeland Road.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 5
Station ID: 8723769 PUBLICATION DATE: 02/26/2004
Name: PLANTATION KEY, ATLANTIC SIDE
FL
NOAA Chart: 11463 Latitude: 24° 58.4' N ( 24.97330)
USGS Quad: PLANTATION KEY Longitude: 80° 33.0' W ( -80.55000)
T I D A L D A T U M S
Tidal datums at PLANTATION KEY, ATLANTIC SIDE based on:
LENGTH OF SERIES: 1 MONTH
TIME PERIOD: July 1975 - July 1975
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION: 8723747 TAVERNIER HAWK CHANNEL
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
MEAN HIGHER HIGH WATER MHHW = 0.752
MEAN HIGH WATER MHW = 0.711
North American Vertical Datum NAVD88 = 0.661
MEAN SEA LEVEL MSL = 0.391
MEAN TIDE LEVEL MTL = 0.385
MEAN LOW WATER MLW = 0.059
MEAN LOWER LOW WATER MLLW = 0.000
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
NO 1 1975 1.637 0.926
NO 2 1975 1.749 1.038
3769 D 1982 4.003 3.292
3769 E 1982 3.512 2.801
3769 F 1982 4.187 3.476
Foot Notes:
Bench marks 3769 D 1982, 3769 E 1982 and 3769 F 1982 are based on one
differential leveling connection and do not meet the quality control standards
of the NOS. Therefore, caution should be used when deriving elevations for these
marks.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 5
Station ID: 8723769 PUBLICATION DATE: 02/26/2004
Name: PLANTATION KEY, ATLANTIC SIDE
FL
NOAA Chart: 11463 Latitude: 24° 58.4' N ( 24.97330)
USGS Quad: PLANTATION KEY Longitude: 80° 33.0' W ( -80.55000)
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.