Superseded Bench Mark Sheet for 8726384, Port Manatee FL

Present Epoch

Printable version

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
Datums Page                                                        Page  1 of  4

                                                   PUBLICATION DATE:  05/23/2000
Station ID: 8726384                                SUPERCEDED DATE:   04/21/2003
Name:       PORT MANATEE, TAMPA BAY                           
            FLORIDA
NOAA Chart: 11414                                  Latitude:         27° 38.2' N
USGS Quad:  COCKROACH BAY                          Longitude:        82° 33.8' W


To reach the tidal bench marks from the main intersection of U.S. Highway 41 and
a medium duty road at Piney Point, proceed NW along the medium duty road for 1.0
km (0.6 mi) to an intersection with a light duty road, continue south along the
light duty road for 0.2 km (0.1 mi) to an intersection with a second light duty
road leading to the Port Manatee Terminal, continue west along this road for 1.0
km (0.6 mi) to a road that runs between two buildings, proceed south between the
two buildings to a basin.  The bench marks are around the basin in the port
area.  The tide station is located on the south side of the basin near the SE
corner.


                         T I D A L   B E N C H   M A R K S


                 PRIMARY BENCH MARK STAMPING:  6384 B 1976
                         DESIGNATION:          872 6384 B TIDAL

MONUMENTATION:           Tidal Station disk                        VM#:     7806
AGENCY:                  National Ocean Survey (NOS)               PID#:  AG7339
SETTING CLASSIFICATION:  Concrete footer of bollard


The primary bench mark is a disk set in the SW side of a concrete pad for two
bollards located at the NE corner of the Port Manatee turning basin, 31.70 m
(104.0 ft) WSW of the west face of warehouse #2, 16.46 m (54.0 ft) SE of the SE
corner of a gray aluminum building, and 1.07 m (3.5 ft) NE of  the NE corner of
the basin.



                         BENCH MARK STAMPING:  6384 C 1976
                         DESIGNATION:          872 6384 C TIDAL

MONUMENTATION:           Tidal Station disk                        VM#:     7807
AGENCY:                  National Ocean Survey (NOS)               PID#:  AG7340
SETTING CLASSIFICATION:  Concrete footing


The bench mark is a disk set in the concrete footing of a blue aluminum building
(warehouse #1) located east of the Port Manatee turning basin area, 43.37 m
(142.3 ft) east of the easternmost bulkhead of the basin, 1.19 m (3.9 ft) north
of the southernmost garage door of two doors on the west side of the building,
and 0.30 m (1.0 ft) west of the building.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  2 of  4

                                                   PUBLICATION DATE:  05/23/2000
Station ID: 8726384                                SUPERCEDED DATE:   04/21/2003
Name:       PORT MANATEE, TAMPA BAY                           
            FLORIDA
NOAA Chart: 11414                                  Latitude:         27° 38.2' N
USGS Quad:  COCKROACH BAY                          Longitude:        82° 33.8' W


                         T I D A L   B E N C H   M A R K S


                         BENCH MARK STAMPING:  6384 E 1976
                         DESIGNATION:          872 6384 E TIDAL

MONUMENTATION:           Tidal Station disk                        VM#:     7808
AGENCY:                  National Ocean Survey (NOS)               PID#:  AG7341
SETTING CLASSIFICATION:  Concrete dock


The bench mark is a disk set in the NE corner of the concrete dock on the south
side of the Port Manatee turning basin, 1.62 m (5.3 ft) south of the north edge
of the dock, 1.43 m (4.7 ft) west of the east edge of the dock, and 1.43 m (4.7
ft) north of a yellow steel cleat secured to the concrete dock.



                         BENCH MARK STAMPING:  6384 J 1991
                         DESIGNATION:          872 6384 J

MONUMENTATION:           Tidal Station disk                        VM#:     7810
AGENCY:                  National Ocean Service (NOS)              PID:         
SETTING CLASSIFICATION:  Concrete deck


The bench mark is a disk set in the concrete deck of the southernmost of two
circular concrete cells at Berth 5 on the north side of the Port Manatee main
basin, 66 m (218 ft) NNW of the NW corner of the steel sheet pile bulkhead,
32.71 m (107.3 ft) WSW of a wooden power pole, and 11.03 m (36.2 ft) ENE of the
center of a double bollard on the cell.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  3 of  4

                                                   PUBLICATION DATE:  05/23/2000
Station ID: 8726384                                SUPERCEDED DATE:   04/21/2003
Name:       PORT MANATEE, TAMPA BAY                           
            FLORIDA
NOAA Chart: 11414                                  Latitude:         27° 38.2' N
USGS Quad:  COCKROACH BAY                          Longitude:        82° 33.8' W


                            T I D A L   D A T U M S 


Tidal datums at PORT MANATEE, TAMPA BAY based on:

     LENGTH OF SERIES:      1 YEAR
     TIME PERIOD:           January 1999 - December 1999
     TIDAL EPOCH:           1960-1978
     CONTROL TIDE STATION:  8726520 ST. PETERSBURG, TAMPA BAY


Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:

     HIGHEST OBSERVED WATER LEVEL (01/03/1999)         =  1.322
     MEAN HIGHER HIGH WATER                     MHHW   =  0.658
     MEAN HIGH WATER                            MHW    =  0.575
     North American Vertical Datum              NAVD88 =  0.530
     MEAN SEA LEVEL                             MSL    =  0.350
     MEAN TIDE LEVEL                            MTL    =  0.341
     MEAN LOW WATER                             MLW    =  0.107
     MEAN LOWER LOW WATER                       MLLW   =  0.000
     LOWEST  OBSERVED WATER LEVEL (01/19/1977)         = -0.462

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     6384 B 1976                                 2.891    2.316
     6384 C 1976                                 3.035    2.460
     6384 E 1976                                 2.658    2.083
     6384 J 1991                                 2.026    1.451


                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  4 of  4

                                                   PUBLICATION DATE:  05/23/2000
Station ID: 8726384                                SUPERCEDED DATE:   04/21/2003
Name:       PORT MANATEE, TAMPA BAY                           
            FLORIDA
NOAA Chart: 11414                                  Latitude:         27° 38.2' N
USGS Quad:  COCKROACH BAY                          Longitude:        82° 33.8' 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 (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.

Return to Top
Products available at 8726384 Port Manatee, FL