U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 5
Station ID: 8722977 PUBLICATION DATE: 04/29/2004
Name: WEST LAKE, NORTH END
FL
NOAA Chart: 11466 Latitude: 26° 2.6' N ( 26.04330)
USGS Quad: FORT LAUDERDALE SOUTH Longitude: 80° 7.6' W ( -80.12670)
To reach the tidal bench marks from the State Road 822 (Sheridan Street) bridge
over West Lake, proceed by boat north on West Lake for 1.2 km (0.75 mi) to the
entrance of a canal near an abandoned wood pier and an old concrete foundation.
The bench marks are on the west bank of the lake north of the canal and on the
old concrete foundation. The tide gage and staff were on the north end of the
old concrete foundation.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: NO 1 1973
DESIGNATION: 872 2977 TIDAL 1
MONUMENTATION: Tidal Station disk VM#: 5727
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete foundation OPUS PID:
LATITUDE: 26° 2.6' N ( 26.04330) LONGITUDE: 80° 7.6' W ( -80.12670)
The primary bench mark is a disk set flush in the south end of the old concrete
foundation located at the mouth of the canal, 4.27 m (14.0 ft) south of the
north edge of the foundation, and 1.22 m (4.0 ft) north of the south edge of the
foundation.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 5
Station ID: 8722977 PUBLICATION DATE: 04/29/2004
Name: WEST LAKE, NORTH END
FL
NOAA Chart: 11466 Latitude: 26° 2.6' N ( 26.04330)
USGS Quad: FORT LAUDERDALE SOUTH Longitude: 80° 7.6' W ( -80.12670)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: NO 2 1973
DESIGNATION: 872 2977 TIDAL 2
MONUMENTATION: Tidal Station disk VM#: 5728
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Copper-clad steel rod OPUS PID:
LATITUDE: 26° 2.6' N ( 26.04330) LONGITUDE: 80° 7.6' W ( -80.12670)
The bench mark is a disk set on the west bank of West Lake north of the canal,
16 m (51 ft) west of the west bank of the lake, 12 m (39 ft) north of the north
bank of the canal, and 1 m (2 ft) south of a witness post with sign. The bench
mark is crimped to the top of a copper-clad steel rod driven 2.4 m (8 ft) to
refusal.
BENCH MARK STAMPING: NO 3 1973
DESIGNATION: 872 2977 TIDAL 3
MONUMENTATION: Tidal Station disk VM#: 5729
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Copper-clad steel rod OPUS PID:
LATITUDE: 26° 2.6' N ( 26.04330) LONGITUDE: 80° 7.6' W ( -80.12670)
The bench mark is a disk set on the west bank of West Lake north of the canal,
34 m (110 ft) NE of bench mark NO 2 1973, 8 m (25 ft) north of the approximate
water line, 5 m (15 ft) west of the west bank of the lake, and 1 m (3 ft) SE of
a witness post with sign. The bench mark is crimped to the top of a copper-clad
steel rod driven 2.4 m (8 ft) to refusal.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 5
Station ID: 8722977 PUBLICATION DATE: 04/29/2004
Name: WEST LAKE, NORTH END
FL
NOAA Chart: 11466 Latitude: 26° 2.6' N ( 26.04330)
USGS Quad: FORT LAUDERDALE SOUTH Longitude: 80° 7.6' W ( -80.12670)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: NO 4 1973
DESIGNATION: 872 2977 TIDAL 4
MONUMENTATION: Tidal Station disk VM#: 5730
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Copper-clad steel rod OPUS PID:
LATITUDE: 26° 2.6' N ( 26.04330) LONGITUDE: 80° 7.6' W ( -80.12670)
The bench mark is a disk set on the west bank of West Lake north of the canal,
28 m (93 ft) north of bench mark NO 3 1973, 5 m (15 ft) west of the west bank of
the lake, and 0.76 m (2.5 ft) SW of a witness post with sign. The bench mark is
crimped to the top of a copper-clad steel rod driven 2.4 m (8 ft) to refusal.
BENCH MARK STAMPING: NO 5 1973
DESIGNATION: 872 2977 TIDAL 5
MONUMENTATION: Tidal Station disk VM#: 5731
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Copper-clad steel rod OPUS PID:
LATITUDE: 26° 2.6' N ( 26.04330) LONGITUDE: 80° 7.6' W ( -80.12670)
The bench mark is a disk set on the west bank of West Lake north of the canal,
46 m (150 ft) north of bench mark NO 2 1973, 30 m (100 ft) NW of bench mark NO 3
1973, 27 m (90 ft) WSW of bench mark NO 4 1973, and 1 m (3 ft) NE of a witness
post with sign. The bench mark is crimped to the top of a copper-clad steel rod
driven 2.4 m (8 ft) to refusal.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 5
Station ID: 8722977 PUBLICATION DATE: 04/29/2004
Name: WEST LAKE, NORTH END
FL
NOAA Chart: 11466 Latitude: 26° 2.6' N ( 26.04330)
USGS Quad: FORT LAUDERDALE SOUTH Longitude: 80° 7.6' W ( -80.12670)
T I D A L D A T U M S
Tidal datums at WEST LAKE, NORTH END based on:
LENGTH OF SERIES: 1 MONTH
TIME PERIOD: August 1973 - 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:
MEAN HIGHER HIGH WATER MHHW = 0.646
MEAN HIGH WATER MHW = 0.624
MEAN SEA LEVEL MSL = 0.338
MEAN TIDE LEVEL MTL = 0.334
MEAN LOW WATER MLW = 0.044
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 1973 1.290 0.666
NO 2 1973 0.751 0.127
NO 3 1973 0.786 0.162
NO 4 1973 0.892 0.268
NO 5 1973 0.802 0.178
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 5
Station ID: 8722977 PUBLICATION DATE: 04/29/2004
Name: WEST LAKE, NORTH END
FL
NOAA Chart: 11466 Latitude: 26° 2.6' N ( 26.04330)
USGS Quad: FORT LAUDERDALE SOUTH Longitude: 80° 7.6' W ( -80.12670)
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.