U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
Datums Page                                                        Page  1 of  5

                                                                                
Station ID: 8723073                         PUBLICATION DATE:  05/15/2003
Name:       HAULOVER INSIDE                                   
            FL
NOAA Chart: 11466                           Latitude:   25° 54.2' N (  25.90330)
USGS Quad:  NORTH MIAMI                     Longitude:  80°  7.5' W ( -80.12500)


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 0.6 km (0.4
mi) 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 sea wall 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
                         DESIGNATION:          872 3073 TIDAL 1

MONUMENTATION:           Tidal Station disk                    VM#:         5758
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  AC3334
SETTING CLASSIFICATION:  Asphalt                               OPUS PID#: AC3334
LATITUDE:   25° 54.2' N (  25.90330)          LONGITUDE:  80°  7.5' W ( -80.12500)


The primary bench mark is a disk recessed in asphalt near the fuel pier at the
Haulover Marina, 37 m (120 ft) south of the centerline of Pier #1, 11 m (36 ft)
east of the NW corner of the fuel pier, and about level with the bulkhead.



                         BENCH MARK STAMPING:  NO 2 1973
                         DESIGNATION:          872 3073 TIDAL 2

MONUMENTATION:           Tidal Station disk                    VM#:         5759
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  AC3335
SETTING CLASSIFICATION:  Asphalt                               OPUS PID:        
LATITUDE:   25° 54.2' N (  25.90330)          LONGITUDE:  80°  7.5' W ( -80.12500)


The bench mark is a disk recessed in asphalt near the ticket office at the
Haulover Marina, 41 m (135 ft) north of Bench Mark NO 1 1973, 4 m (12 ft) 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  5

                                                                                
Station ID: 8723073                         PUBLICATION DATE:  05/15/2003
Name:       HAULOVER INSIDE                                   
            FL
NOAA Chart: 11466                           Latitude:   25° 54.2' N (  25.90330)
USGS Quad:  NORTH MIAMI                     Longitude:  80°  7.5' W ( -80.12500)


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


                         BENCH MARK STAMPING:  NO 3 1973
                         DESIGNATION:          872 3073 TIDAL 3

MONUMENTATION:           Tidal Station disk                    VM#:         5760
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  AC3336
SETTING CLASSIFICATION:  Asphalt                               OPUS PID:        
LATITUDE:   25° 54.2' N (  25.90330)          LONGITUDE:  80°  7.5' W ( -80.12500)


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



                         BENCH MARK STAMPING:  NO 4 1973
                         DESIGNATION:          872 3073 TIDAL 4

MONUMENTATION:           Tidal Station disk                    VM#:         5761
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  AC3337
SETTING CLASSIFICATION:  Asphalt                               OPUS PID:        
LATITUDE:   25° 54.2' N (  25.90330)          LONGITUDE:  80°  7.5' W ( -80.12500)


The bench mark is a disk recessed in asphalt SW of the dock masters office, 114
m (375 ft) north of Bench Mark NO 1 1973, 78 m (255 ft) 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  5

                                                                                
Station ID: 8723073                         PUBLICATION DATE:  05/15/2003
Name:       HAULOVER INSIDE                                   
            FL
NOAA Chart: 11466                           Latitude:   25° 54.2' N (  25.90330)
USGS Quad:  NORTH MIAMI                     Longitude:  80°  7.5' W ( -80.12500)


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


                         BENCH MARK STAMPING:  NO 5 1973
                         DESIGNATION:          872 3073 TIDAL 5

MONUMENTATION:           Tidal Station disk                    VM#:         5762
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  AC3338
SETTING CLASSIFICATION:  Asphalt                               OPUS PID:        
LATITUDE:   25° 54.2' N (  25.90330)          LONGITUDE:  80°  7.5' W ( -80.12500)


The bench mark is a disk recessed in asphalt NW of the dock masters office, 152
m (500 ft) north of Bench Mark NO 1 1973, 116 m (380 ft) 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  4 of  5

                                                                                
Station ID: 8723073                         PUBLICATION DATE:  05/15/2003
Name:       HAULOVER INSIDE                                   
            FL
NOAA Chart: 11466                           Latitude:   25° 54.2' N (  25.90330)
USGS Quad:  NORTH MIAMI                     Longitude:  80°  7.5' W ( -80.12500)


                            T I D A L   D A T U M S 


Tidal datums at HAULOVER INSIDE based on:

     LENGTH OF SERIES:      12 MONTHS
     TIME PERIOD:           July 1974 - June 1975
     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)         =  1.120
     MEAN HIGHER HIGH WATER                     MHHW   =  0.671
     MEAN HIGH WATER                            MHW    =  0.651
     North American Vertical Datum              NAVD88 =  0.590
     MEAN TIDE LEVEL                            MTL    =  0.345
     MEAN SEA LEVEL                             MSL    =  0.331
     MEAN LOW WATER                             MLW    =  0.038
     MEAN LOWER LOW WATER                       MLLW   =  0.000
     LOWEST  OBSERVED WATER LEVEL (04/06/1974)         = -0.352

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     NO 1 1973                                   1.397    0.746
     NO 2 1973                                   1.377    0.726
     NO 3 1973                                   1.365    0.714
     NO 4 1973                                   1.352    0.701
     NO 5 1973                                   1.359    0.708


                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  5 of  5

                                                                                
Station ID: 8723073                         PUBLICATION DATE:  05/15/2003
Name:       HAULOVER INSIDE                                   
            FL
NOAA Chart: 11466                           Latitude:   25° 54.2' N (  25.90330)
USGS Quad:  NORTH MIAMI                     Longitude:  80°  7.5' W ( -80.12500)


                             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.