Superseded Bench Mark Sheet for 8723073, HAULOVER INSIDE FL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:  10/05/1987
Station ID: 8723073                                SUPERCEDED DATE:   04/21/2003
Name:       HAULOVER, INTRACOASTAL WATERWAY                   
            FLORIDA
NOAA Chart: 11466                                  Latitude:         25° 54.2' N
USGS Quad:  NORTH MIAMI                            Longitude:        80°  7.6' W


To reach the tidal bench marks from Bal Harbour at the State Highway A1A bridge
over Bakers Haulover Inlet, proceed north on State Highway A1A for 0.4 mile (0.6
km) to the entrance to Haulover Marina (10800 Collins Avenue) and then to the
south end of the marina.  The bench marks are located along the marina bulkhead.
 The tide gage and staff were located on the seawall just north of Pier #1 at
the Marina.


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


                 PRIMARY BENCH MARK STAMPING:  NO 1 1973

MONUMENTATION:           Survey Disk                               VM#:     5758
AGENCY:                                                            PID#:  AC3334
SETTING CLASSIFICATION:  Concrete Monument


The bench mark is recessed in asphalt, 120 feet (37 m) south of the centerline
of Pier #1, 36 feet (11 m) east of the NW corner of the fueling pier, and about
level with the bulkhead.



                         BENCH MARK STAMPING:  NO 2 1973

MONUMENTATION:           Survey Disk                               VM#:     5759
AGENCY:                                                            PID#:  AC3335
SETTING CLASSIFICATION:  Concrete Monument


The bench mark is recessed in asphalt, 135 feet (41 m) north of Bench Mark No 1
1973, 12 feet (4 m) north of the centerline of Pier #1, and about level with the
bulkhead.

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

                                                   PUBLICATION DATE:  10/05/1987
Station ID: 8723073                                SUPERCEDED DATE:   04/21/2003
Name:       HAULOVER, INTRACOASTAL WATERWAY                   
            FLORIDA
NOAA Chart: 11466                                  Latitude:         25° 54.2' N
USGS Quad:  NORTH MIAMI                            Longitude:        80°  7.6' W


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


                         BENCH MARK STAMPING:  NO 3 1973

MONUMENTATION:           Survey Disk                               VM#:     5760
AGENCY:                                                            PID#:  AC3336
SETTING CLASSIFICATION:  Concrete Monument


The bench mark is recessed in asphalt west of the charter boat ticket office,
255 feet (78 m) north of Bench Mark No 1 1973, 135 feet (41 m) north of the
centerline of Pier #1, and about level with the bulkhead.



                         BENCH MARK STAMPING:  NO 4 1973

MONUMENTATION:           Survey Disk                               VM#:     5761
AGENCY:                                                            PID#:  AC3337
SETTING CLASSIFICATION:  Concrete Monument


The bench mark is recessed in asphalt SW of the dock masters office, 375 feet
(114 m) north of Bench Mark No 1 1973, 255 Feet (78 m) north of the centerline
of Pier #1, and about level with the bulkhead.



                         BENCH MARK STAMPING:  NO 5 1973

MONUMENTATION:           Survey Disk                               VM#:     5762
AGENCY:                                                            PID#:  AC3338
SETTING CLASSIFICATION:  Concrete Monument


The bench mark is recessed in asphalt NW of the dock masters office, 500 feet
(152 m) north of Bench Mark No 1 1973, 380 feet (116 m) north of the centerline
of Pier #1, and about level with the bulkhead.

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

                                                   PUBLICATION DATE:  10/05/1987
Station ID: 8723073                                SUPERCEDED DATE:   04/21/2003
Name:       HAULOVER, INTRACOASTAL WATERWAY                   
            FLORIDA
NOAA Chart: 11466                                  Latitude:         25° 54.2' N
USGS Quad:  NORTH MIAMI                            Longitude:        80°  7.6' W


                            T I D A L   D A T U M S 


Tidal datums at HAULOVER, INTRACOASTAL WATERWAY based on:

     LENGTH OF SERIES:      21 MONTHS
     TIME PERIOD:           AUGUST 1973-JULY 1975
     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 (10/25/1973)         =   3.88
     MEAN HIGHER HIGH WATER                     MHHW   =   2.27
     MEAN HIGH WATER                            MHW    =   2.20
     MEAN TIDE LEVEL                            MTL    =   1.17
     MEAN LOW WATER                             MLW    =   0.14
     MEAN LOWER LOW WATER                       MLLW   =   0.00
     LOWEST  OBSERVED WATER LEVEL (04/06/1974)         =  -0.95

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In FEET above:

     Stamping or Designation                    MLLW        MHW

     NO 1 1973                                   4.79      2.59
     NO 2 1973                                   4.72      2.52
     NO 3 1973                                   4.68      2.48
     NO 4 1973                                   4.64      2.44
     NO 5 1973                                   4.66      2.46


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

                                                   PUBLICATION DATE:  10/05/1987
Station ID: 8723073                                SUPERCEDED DATE:   04/21/2003
Name:       HAULOVER, INTRACOASTAL WATERWAY                   
            FLORIDA
NOAA Chart: 11466                                  Latitude:         25° 54.2' N
USGS Quad:  NORTH MIAMI                            Longitude:        80°  7.6' 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.

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