U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 4
PUBLICATION DATE: 12/12/1986
Station ID: 8722383 SUPERCEDED DATE: 04/21/2003
Name: PORT SALERNO, MANATEE POCKET, ST. LUCIE RIVER
FLORIDA
NOAA Chart: 11474 Latitude: 27° 9.0' N
USGS Quad: St. Lucie Inlet Longitude: 80° 11.7' W
To reach the tidal bench marks from the U.S. Post Office in Port Salerno,
proceed 0.05 mile (0.08 km) north on State Highway A1A to the intersection with
Steward Street, then 0.25 mile (0.40 km) east on Stewart Street to the Pirate
Cove Marina. The bench marks are located on the Pirate Cove Marina concrete
seawall. The tide gage and staff were located on the north end of an old E
shaped wooden dock.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: NO 1 1972
MONUMENTATION: Survey Disk VM#: 5459
AGENCY: PID#: AF6957
SETTING CLASSIFICATION: Concrete Seawall
The bench mark is set flush in the top of the concrete marina seawall 128 feet
(39 m) south of Bench Mark NO 2 1972, 69.7 feet (21.2 m) east of the NE corner
of a large pump house for the swimming pool, 50 feet (15 m) east of the NE
corner of the dockmasters building, and 18 feet (5 m) east of the centerline of
the dirt road to the trailer park.
BENCH MARK STAMPING: NO 2 1972
MONUMENTATION: Survey Disk VM#: 5460
AGENCY: PID#: AF6958
SETTING CLASSIFICATION: Concrete Seawall
The bench mark is set flush in the top of the concrete marina seawall, 128.2
feet (39.1 m) south of Bench Mark NO 3 1972, 14 feet (4 m) east of the
centerline of the dirt road to the trailer park, and 13 feet (4 m) south of an
8-foot (2 m) wide aluminum walkway to the fueling dock.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 4
PUBLICATION DATE: 12/12/1986
Station ID: 8722383 SUPERCEDED DATE: 04/21/2003
Name: PORT SALERNO, MANATEE POCKET, ST. LUCIE RIVER
FLORIDA
NOAA Chart: 11474 Latitude: 27° 9.0' N
USGS Quad: St. Lucie Inlet Longitude: 80° 11.7' W
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: NO 3 1972
MONUMENTATION: Survey Disk VM#: 5461
AGENCY: PID#: AF6959
SETTING CLASSIFICATION: Concrete Seawall
The bench mark is set flush in the top of the concrete marina seawall, 128.2
feet (39.1 m) north of Bench Mark NO 2 1972, 15 feet (5 m) south of a finger
pier, and 14 feet (4 m) east of the dirt road to the trailer park.
BENCH MARK STAMPING: NO 4 1972
MONUMENTATION: Survey Disk VM#: 5462
AGENCY: PID#: AF6956
SETTING CLASSIFICATION: Concrete Seawall
The bench mark is set flush in the top of the concrete marina seawall, 86 feet
(26 m) south of Bench Mark NO 1 1972, 78.7 feet (24.0 m) NE of Bench Mark NO 5
1972, 17 feet (5 m) east of the dirt road to the trailer park, and 15 feet (5 m)
south of an 8-foot (2 m) wide aluminum walkway to a T dock.
BENCH MARK STAMPING: NO 5 1972
MONUMENTATION: Survey Disk VM#: 5463
AGENCY: PID#: AF6955
SETTING CLASSIFICATION: Concrete Seawall
The bench mark is set flush in the top of the concrete marina seawall, 78.7 feet
(24.0 m) SW of Bench Mark NO 4 1972, 54.9 feet (16.7 m) NE of the SW end of the
seawall, and 17 feet (5 m) east of the centerline of the dirt road to the
trailer park.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 4
PUBLICATION DATE: 12/12/1986
Station ID: 8722383 SUPERCEDED DATE: 04/21/2003
Name: PORT SALERNO, MANATEE POCKET, ST. LUCIE RIVER
FLORIDA
NOAA Chart: 11474 Latitude: 27° 9.0' N
USGS Quad: St. Lucie Inlet Longitude: 80° 11.7' W
T I D A L D A T U M S
Tidal datums at PORT SALERNO, MANATEE POCKET, ST. LUCIE RIVER based on:
LENGTH OF SERIES: 2 MONTHS
TIME PERIOD: August-September 1972
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 (10/06/1972) = 2.31
MEAN HIGHER HIGH WATER MHHW = 1.14
MEAN HIGH WATER MHW = 1.03
MEAN TIDE LEVEL MTL = 0.58
MEAN LOW WATER MLW = 0.13
MEAN LOWER LOW WATER MLLW = 0.00
LOWEST OBSERVED WATER LEVEL (07/28/1972) = -0.52
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In FEET above:
Stamping or Designation MLLW MHW
NO 1 1972 4.13 3.10
NO 2 1972 4.17 3.14
NO 3 1972 4.21 3.18
NO 4 1972 4.17 3.14
NO 5 1972 4.24 3.21
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 4
PUBLICATION DATE: 12/12/1986
Station ID: 8722383 SUPERCEDED DATE: 04/21/2003
Name: PORT SALERNO, MANATEE POCKET, ST. LUCIE RIVER
FLORIDA
NOAA Chart: 11474 Latitude: 27° 9.0' N
USGS Quad: St. Lucie Inlet Longitude: 80° 11.7' 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.