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Datums Page Page 1 of 12
Station ID: 8722557 PUBLICATION DATE: 03/24/2010
Name: NORTH PALM BEACH
FL
NOAA Chart: 11466 Latitude: 26° 49.6' N ( 26.82670)
USGS Quad: RIVIERA BEACH Longitude: 80° 3.3' W ( -80.05500)
To reach the tidal bench marks from the intersection of U.S. Highway 1 and Yacht
Club Drive in North Palm Beach, 0.5 km (0.3 mi) south of the U.S. Highway 1
bridge over the Intracoastal Waterway, proceed east on Yacht Club Drive to the
Landings East Condominiums on Lake Worth. The bench marks are located in the
vicinity of the condominiums, along Yacht Club Drive, and along U.S. Highway 1.
The tide gage and staff were located on a dock behind the condominiums.
T I D A L B E N C H M A R K S
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 12
Station ID: 8722557 PUBLICATION DATE: 03/24/2010
Name: NORTH PALM BEACH
FL
NOAA Chart: 11466 Latitude: 26° 49.6' N ( 26.82670)
USGS Quad: RIVIERA BEACH Longitude: 80° 3.3' W ( -80.05500)
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: N 309 1970
DESIGNATION: N 309
MONUMENTATION: Bench Mark disk VM#: 5592
AGENCY: US Coastal and Geodetic Survey
(USC&GS) IDB PID#: AD2896
SETTING CLASSIFICATION: Concrete sea wall OPUS PID:
LATITUDE: 26° 49.6' N ( 26.82670) LONGITUDE: 80° 3.4' W ( -80.05667)
The primary bench mark is a disk set flush in a concrete sea wall located at the
Landings East Condominiums, 19.63 m (64.4 ft) south of the south edge of the
center wooden dock of three wooden docks, 10.76 m (35.3 ft) east of the SE
corner of the condominiums building at 52 Yacht Club Drive, and 0.30 m (1.0 ft)
above the level of the lawn.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 12
Station ID: 8722557 PUBLICATION DATE: 03/24/2010
Name: NORTH PALM BEACH
FL
NOAA Chart: 11466 Latitude: 26° 49.6' N ( 26.82670)
USGS Quad: RIVIERA BEACH Longitude: 80° 3.3' W ( -80.05500)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: L 309 1970
DESIGNATION: L 309
MONUMENTATION: Bench Mark disk VM#: 5590
AGENCY: US Coastal and Geodetic Survey
(USC&GS) IDB PID#: AD2899
SETTING CLASSIFICATION: Copper-Clad Steel Rod OPUS PID:
LATITUDE: 26° 49.6' N ( 26.82670) LONGITUDE: 80° 3.4' W ( -80.05670)
The bench mark is a disk located in the SW corner of the lawn for the Landings
East Condominiums at 52 Yacht Club Drive, 17.22 m (56.5 ft) west of the SW
corner of the swimming pool, 12.50 m (41.0 ft) south of the centerline of the
driveway to a parking lot, 10.97 m (36.0 ft) east of the Yacht Club Drive
centerline, 1.49 m (4.9 ft) east of the east edge of a sidewalk, 1.07 m (3.5 ft)
east of the east end of a row of hedges, 0.24 m (0.8 ft) north of a row of
hedge, and 0.24 m (0.8 ft) north of a metal witness post. The bench mark is a
disk crimped to the top of a copper-clad steel rod driven to a depth of 9.75 m
(32.0 ft), and encased in a 4-inch metal pipe.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 12
Station ID: 8722557 PUBLICATION DATE: 03/24/2010
Name: NORTH PALM BEACH
FL
NOAA Chart: 11466 Latitude: 26° 49.6' N ( 26.82670)
USGS Quad: RIVIERA BEACH Longitude: 80° 3.3' W ( -80.05500)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: M 309 1970
DESIGNATION: M 309
MONUMENTATION: Bench Mark disk VM#: 5591
AGENCY: US Coastal and Geodetic Survey (NGS) IDB PID#: AD2900
SETTING CLASSIFICATION: Concrete wall OPUS PID:
LATITUDE: 26° 49.6' N ( 26.82667) LONGITUDE: 80° 3.4' W ( -80.05670)
The bench mark is a disk set flush in the top of the SW corner of a concrete
wall surrounding the steps leading to an underground pumphouse for the pool,
about level with the parking area, 17.22 m (56.5 ft) NE of bench mark L 309
1970, and 4.88 m (16.0 ft) NW of the NW corner of the swimming pool.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 12
Station ID: 8722557 PUBLICATION DATE: 03/24/2010
Name: NORTH PALM BEACH
FL
NOAA Chart: 11466 Latitude: 26° 49.6' N ( 26.82670)
USGS Quad: RIVIERA BEACH Longitude: 80° 3.3' W ( -80.05500)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: P 309 1970
DESIGNATION: P 309
MONUMENTATION: Bench Mark disk VM#: 5593
AGENCY: US Coastal and Geodetic Survey (NGS) IDB PID#: AD2901
SETTING CLASSIFICATION: Concrete sea wall OPUS PID:
LATITUDE: 26° 49.7' N ( 26.82830) LONGITUDE: 80° 3.4' W ( -80.05670)
The bench mark is a disk set in the top of a concrete sea wall located near the
NE corner of the lawn for the Landing East Condominiums, 22.25 m (73.0 ft) NE of
the NE corner of Landings East Condominiums, and about level with the lawn.
NOTE: The mark is located at about the center of a curve in the sea wall and a
penny is embedded in the concrete 0.09 m (0.3 ft) north of the survey disk.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 12
Station ID: 8722557 PUBLICATION DATE: 03/24/2010
Name: NORTH PALM BEACH
FL
NOAA Chart: 11466 Latitude: 26° 49.6' N ( 26.82670)
USGS Quad: RIVIERA BEACH Longitude: 80° 3.3' W ( -80.05500)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: Q 309 1970
DESIGNATION: Q 309
MONUMENTATION: Bench Mark disk VM#: 5594
AGENCY: US Coastal and Geodetic Survey (NGS) IDB PID#: AD2895
SETTING CLASSIFICATION: Concrete Catch Basin OPUS PID#: AD2895
LATITUDE: 26° 49.6' N ( 26.82670) LONGITUDE: 80° 3.5' W ( -80.05833)
The bench mark is a disk set in the NE corner of a 3-foot square and 3 foot deep
concrete catch basin located 25.60 m (84.0 ft) SE of the SE corner of a large
yacht basin, 10.06 m (33.0 ft) east of the centerline of a driveway which leads
north between the yacht basin and the Bimini Key Condominiums, 6.10 m (20.0 ft)
north of the centerline of Yacht Club Drive, 1.74 m (5.7 ft) south of the south
edge of a sidewalk, and 0.15 m (0.5 ft) below road level.
BENCH MARK STAMPING: 29.591
DESIGNATION: 29.591 FLHD
MONUMENTATION: Survey disk VM#: 5595
AGENCY: Florida Department of Transportation
(FLSRD) IDB PID#: AD2897
SETTING CLASSIFICATION: Concrete Bridge Abutment OPUS PID:
LATITUDE: 26° 49.8' N ( 26.83000) LONGITUDE: 80° 3.6' W ( -80.06000)
The bench mark is a disk set on the top of the east end of the south concrete
abutment for the U.S. Highway 1 bridge over the Intercoastal Waterway, 5.49 m
(18.0 ft) east of the centerline of the northbound highway lane, and 0.30 m (1.0
ft) above highway level. NOTE: The stamping is nearly unreadable.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 7 of 12
Station ID: 8722557 PUBLICATION DATE: 03/24/2010
Name: NORTH PALM BEACH
FL
NOAA Chart: 11466 Latitude: 26° 49.6' N ( 26.82670)
USGS Quad: RIVIERA BEACH Longitude: 80° 3.3' W ( -80.05500)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: L 305 1970
DESIGNATION: L 305
MONUMENTATION: Vertical Control disk VM#: 18750
AGENCY: US Coastal and Geodetic Survey IDB PID#: AD2889
SETTING CLASSIFICATION: Concrete Catch Basin OPUS PID:
LATITUDE: 26° 50.6' N ( 26.84333) LONGITUDE: 80° 3.5' W ( -80.05833)
The bench mark is a disk set in the top of the SW corner of a 3-foot square
concrete catch basin which is 0.91 m (3.0 ft) deep 64.01 m (210.0 ft) west of
the NW corner of a 60-foot bridge over a narrow channel, 10.67 m (35.0 ft) north
of the center line of the highway, 8.23 m (27.0 ft) SW of the center of the
junction of sidewalk leading to apartment buildings, and 0.76 m (2.5 ft) below
the level of the highway. NOTE: The mark is located at Juno, about 0.32 km
(0.2 mi) east along State Highway A1A from the junction of U.S. Highway 1.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 8 of 12
Station ID: 8722557 PUBLICATION DATE: 03/24/2010
Name: NORTH PALM BEACH
FL
NOAA Chart: 11466 Latitude: 26° 49.6' N ( 26.82670)
USGS Quad: RIVIERA BEACH Longitude: 80° 3.3' W ( -80.05500)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: IWP-2008 1990 JAX. FLA
DESIGNATION: IWP 208
MONUMENTATION: Survey disk VM#: 18751
AGENCY: US Army Corps of Engineers (USE) IDB PID#: DJ9599
SETTING CLASSIFICATION: Concrete Bridge Sidewalk OPUS PID:
LATITUDE: 26° 49.9' N ( 26.83167) LONGITUDE: 80° 3.6' W ( -80.06000)
The bench mark is a disk set flush in the top of the concrete sidewalk that runs
along the east edge of the bridge and north of the steel grid portion of the
draw bridge, located 94.18 m (309.0 ft) NE of a FLSRD survey mark 29.591, 45.54
m (149.4 ft) south of a FLDOT survey mark 29.958 9396X181, 5.12 m (16.8 ft) SE
of the approximate centerline of the northbound lanes of U.S. Highway 1 (Federal
Highway) and 0.24 m (0.8 ft) above the highway surface.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 9 of 12
Station ID: 8722557 PUBLICATION DATE: 03/24/2010
Name: NORTH PALM BEACH
FL
NOAA Chart: 11466 Latitude: 26° 49.6' N ( 26.82670)
USGS Quad: RIVIERA BEACH Longitude: 80° 3.3' W ( -80.05500)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: IWP-238 1994
DESIGNATION: IWP 238
MONUMENTATION: Survey disk VM#: 18752
AGENCY: US Army Corps of Engineers (USE) IDB PID#: DJ9600
SETTING CLASSIFICATION: Concrete Sea Wall OPUS PID:
LATITUDE: 26° 49.7' N ( 26.82833) LONGITUDE: 80° 3.4' W ( -80.05667)
The bench mark is a disk set flush in the top of the concrete sea wall near the
NE corner of the Landings East apartment building, located 86.08 m (282.4 ft) NE
of a CGS bench mark N 309 1970, 25.69 m (84.3 ft) SE of the NE corner of the
Lands End Condominium building, 13.29 m (43.6 ft) NE of the NE corner of
Landings East apartments, 11.03 m (36.2 ft) SW of a CGS bench mark P 309 1970
and 5.70 m (18.7 ft) south of a 12-inch palm tree.
BENCH MARK STAMPING: 29.958 9396X181
DESIGNATION: 29.958
MONUMENTATION: Survey disk VM#: 18753
AGENCY: Florida Department of Transportation
(FLSRD) IDB PID#: AD2898
SETTING CLASSIFICATION: Concrete Bridge Abutment OPUS PID:
LATITUDE: 26° 49.9' N ( 26.83167) LONGITUDE: 80° 3.6' W ( -80.06000)
The bench mark is a disk set in the top of the west end of the north concrete
abutment of the highway bridge over the Intracoastal Waterway 5.49 m (18.0 ft)
west of the center line of the southbound lane of U.S. Highway 1 and 0.30 m (1.0
ft) above the level of the highway. NOTE: The mark is located about 0.64 km
(0.4 mi) north along U.S. Highway 1 from the junction of Yacht Club Drive.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 10 of 12
Station ID: 8722557 PUBLICATION DATE: 03/24/2010
Name: NORTH PALM BEACH
FL
NOAA Chart: 11466 Latitude: 26° 49.6' N ( 26.82670)
USGS Quad: RIVIERA BEACH Longitude: 80° 3.3' W ( -80.05500)
T I D A L D A T U M S
Tidal datums at NORTH PALM BEACH based on:
LENGTH OF SERIES: 3 YEARS
TIME PERIOD: September 1970 - August 1973
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION: 8723170 MIAMI BEACH (CITY PIER)
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
HIGHEST OBSERVED WATER LEVEL (10/25/1973) = 1.510
MEAN HIGHER HIGH WATER MHHW = 0.972
MEAN HIGH WATER MHW = 0.912
North American Vertical Datum NAVD88 = 0.804
MEAN SEA LEVEL MSL = 0.490
MEAN TIDE LEVEL MTL = 0.484
MEAN LOW WATER MLW = 0.056
MEAN LOWER LOW WATER MLLW = 0.000
LOWEST OBSERVED WATER LEVEL (05/22/1971) = -0.456
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
N 309 1970 2.022 1.110
L 309 1970 2.346 1.434
M 309 1970 2.628 1.716
P 309 1970 2.030 1.118
Q 309 1970 1.973 1.061
29.591 9.365 8.453
L 305 1970 1.872 0.960
IWP-2008 1990 JAX. FLA 9.734 8.822
IWP-238 1994 2.021 1.109
29.958 9396X181 9.479 8.567
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 11 of 12
Station ID: 8722557 PUBLICATION DATE: 03/24/2010
Name: NORTH PALM BEACH
FL
NOAA Chart: 11466 Latitude: 26° 49.6' N ( 26.82670)
USGS Quad: RIVIERA BEACH Longitude: 80° 3.3' W ( -80.05500)
Foot Notes:
Geodetic heights of the bench marks meet all NOAA/NOS/NGS quality control
standards for Second Order, Class 1 leveling. It is advised that a confirmation
set of levels be established for bench marks L 305 1970, IWP-2008 1990 JAX. FLA,
IWP-238 1994, and 29.958 9396X181 to verify height differences before using
tidal bench mark elevation information.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 12 of 12
Station ID: 8722557 PUBLICATION DATE: 03/24/2010
Name: NORTH PALM BEACH
FL
NOAA Chart: 11466 Latitude: 26° 49.6' N ( 26.82670)
USGS Quad: RIVIERA BEACH Longitude: 80° 3.3' W ( -80.05500)
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.