U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 5
Station ID: 8722478 PUBLICATION DATE: 12/12/2003
Name: NORTH FORK, LOXAHATCHEE RIVER
FLORIDA
NOAA Chart: 11474 Latitude: 26° 58.5' N
USGS Quad: JUPITER Longitude: 80° 6.8' W
To reach the tidal bench marks from the intersection of U.S. Highway 1 and
Tequesta Drive in Tequesta, proceed 2.6 km (1.6 mi) west on Tequesta Drive to
Country Club Drive, then turn right and proceed north on Country Club Drive for
1.8 km (1.1 mi) to the entrance to Turtle Creek development, then turn left and
proceed north on Concourse Drive for 0.40 km (0.25 mi) to Hitching Post Circle,
then turn right and proceed NE on Hitching Post Circle for 0.2 km (0.1 mi) to
Saddleback Road. The bench marks are in the vicinity of 29 Saddleback Road and
at the intersection of Saddleback Road and Turtle Creek Drive. The tide gage
and staff were located on the pier at the rear of 31 Saddleback Road.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: NO 1 1972
DESIGNATION: 872 2478 TIDAL 1
MONUMENTATION: Tidal Station disk VM#: 5506
AGENCY: National Ocean Survey (NOS) PID#: AD5793
SETTING CLASSIFICATION: Concrete sea wall
The primary bench mark is a disk set flush in the concrete sea wall in the rear
of 29 Saddleback Road, 11.16 m (36.6 ft) north of bench mark NO 2 1972, 1.68 m
(5.5 ft) NW of the NE corner of the sea wall, 1.52 m (5.0 ft) north of the
centerline of a small pier, and 0.52 m (1.7 ft) SE of the NW end of the sea
wall.
BENCH MARK STAMPING: NO 2 1972
DESIGNATION: 872 2478 TIDAL 2
MONUMENTATION: Tidal Station disk VM#: 5507
AGENCY: National Ocean Survey (NOS) PID#: AD5794
SETTING CLASSIFICATION: Concrete sea wall
The bench mark is a disk set flush in a concrete sea wall in the rear of 29
Saddleback Road, 11.16 m (36.6 ft) south of bench mark NO 1 1972, 9.63 m (31.6
ft) south of the centerline of a small pier, 7.16 m (23.5 ft) east of the SE
corner of the house, and 0.98 m (3.2 ft) SW of the SE corner of the sea wall.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 5
Station ID: 8722478 PUBLICATION DATE: 12/12/2003
Name: NORTH FORK, LOXAHATCHEE RIVER
FLORIDA
NOAA Chart: 11474 Latitude: 26° 58.5' N
USGS Quad: JUPITER Longitude: 80° 6.8' W
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: NO 3 1972
DESIGNATION: 872 2478 TIDAL 3
MONUMENTATION: Tidal Station disk VM#: 5508
AGENCY: National Ocean Survey (NOS) PID#: AD5797
SETTING CLASSIFICATION: Concrete catch basin
The bench mark is a disk set flush in the NE corner of a 1.07 m (3.5 ft) square
concrete catch basin near the intersection of Saddleback Road and Turtle Creek
Drive, 20.27 m (66.5 ft) NE of bench mark NO 5 1972, 12 m (39 ft) east of bench
mark NO 4 1972, 6 m (20 ft) east of the centerline of Saddleback Road, and 3.29
m (10.8 ft) north of utility pole #6-7742-6640-0-1.
BENCH MARK STAMPING: NO 4 1972
DESIGNATION: 872 2478 TIDAL 4
MONUMENTATION: Tidal Station disk VM#: 5509
AGENCY: National Ocean Survey (NOS) PID#: AD5796
SETTING CLASSIFICATION: Concrete catch basin
The bench mark is a disk set flush in the SW corner of a 1.07 m (3.5 ft) square
concrete catch basin near the intersection of Saddleback Road and Turtle Creek
Drive, 15.54 m (51.0 ft) north of bench mark NO 5 1972, 12 m (39 ft) west of
bench mark NO 3 1972, 11.43 m (37.5 ft) WNW of utility pole #6-7742-6640-0-1, 7
m (24 ft) north of the centerline of Turtle Creek Road, and 5.79 m (19.0 ft)
west of the centerline of Saddleback Road.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 5
Station ID: 8722478 PUBLICATION DATE: 12/12/2003
Name: NORTH FORK, LOXAHATCHEE RIVER
FLORIDA
NOAA Chart: 11474 Latitude: 26° 58.5' N
USGS Quad: JUPITER Longitude: 80° 6.8' W
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: NO 5 1972
DESIGNATION: 872 2478 TIDAL 5
MONUMENTATION: Tidal Station disk VM#: 5510
AGENCY: National Ocean Survey (NOS) PID#: AD5795
SETTING CLASSIFICATION: Concrete catch basin
The bench mark is a disk set flush in the NW corner of a 3.5-foot (1.1 m) square
concrete catch basin near the intersection of Saddleback Road and Turtle Creek
Drive, 20.27 m (66.5 ft) SW of bench mark NO 3 1972, 17.34 m (56.9 ft) SW of
utility pole #6-7742-6640-0-1, 15.54 m (51.0 ft) south of bench mark NO 4 1972,
8.23 m (27.0 ft) south of the centerline of Turtle Creek Drive, and 6 m (20 ft)
west of the centerline of Saddleback Road.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 5
Station ID: 8722478 PUBLICATION DATE: 12/12/2003
Name: NORTH FORK, LOXAHATCHEE RIVER
FLORIDA
NOAA Chart: 11474 Latitude: 26° 58.5' N
USGS Quad: JUPITER Longitude: 80° 6.8' W
T I D A L D A T U M S
Tidal datums at NORTH FORK, LOXAHATCHEE RIVER based on:
LENGTH OF SERIES: 2 MONTHS
TIME PERIOD: December 1972 - January 1973
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION: 8722557 NORTH PALM BEACH
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
MEAN HIGHER HIGH WATER (MHHW) = 0.676
NORTH AMERICAN VERTICAL DATUM-1988 (NAVD) = 0.631
MEAN HIGH WATER (MHW) = 0.628
MEAN TIDE LEVEL (MTL) = 0.338
MEAN SEA LEVEL (MSL) = 0.337
MEAN LOW WATER (MLW) = 0.047
MEAN LOWER LOW WATER (MLLW) = 0.000
National Geodetic Vertical Datum (NGVD 29)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
NO 1 1972 0.981 0.353
NO 2 1972 0.987 0.359
NO 3 1972 2.200 1.572
NO 4 1972 2.304 1.676
NO 5 1972 2.309 1.681
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 5
Station ID: 8722478 PUBLICATION DATE: 12/12/2003
Name: NORTH FORK, LOXAHATCHEE RIVER
FLORIDA
NOAA Chart: 11474 Latitude: 26° 58.5' N
USGS Quad: JUPITER Longitude: 80° 6.8' 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 (NAVD 88).
NGVD 29 is a fixed datum adopted as a national standard geodetic reference for
heights but is now considered superseded. NGVD 29 is sometimes referred to as
Sea Level Datum of 1929 or as Mean Sea Level on some early issues of Geological
Survey Topographic Quads. NGVD 29 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 NGVD 29 are available from the National
Geodetic Survey (NGS) data base via the World Wide Web at
National Geodetic Survey.
NAVD 88 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. NAVD 88 replaces NGVD 29 as the national
standard geodetic reference for heights. Bench mark elevations relative to
NAVD 88 are available from NGS through the World Wide Web at
National Geodetic Survey.
NGVD 29 and NAVD 88 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 NAVD 88 elevation is shown on the Elevations of Tidal Datums Table Referred
to MLLW only when two or more of the bench marks listed have NAVD 88 elevations.
The NAVD 88 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, NAVD 88 bench mark elevations computed indirectly from the tidal
datums elevation table may differ slightly from NAVD 88 elevations listed for
each bench mark in the NGS database.