Bench Mark Sheet for 8723050, NORTH MIAMI BEACH FL

Superseded Epoch

Large map location marker Station Location
Small red map location marker Published bench mark
Small blue map location marker Unpublished bench mark

Bench mark positions only appear on the map if their coordinates in the CO-OPS database are at the precision of degrees/minutes/seconds/and tenths of seconds. If the coordinates are less precise, the mark will not appear.

Printable version

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
Datums Page                                                        Page  1 of  6

                                                                                
Station ID: 8723050                         PUBLICATION DATE:  05/06/2003
Name:       NORTH MIAMI BEACH                                 
            FL
NOAA Chart: 11466                           Latitude:   25° 55.8' N (  25.93000)
USGS Quad:  NORTH MIAMI                     Longitude:  80°  7.2' W ( -80.12000)


To reach the tidal bench marks from the intersection of State Highway A1A
(Collins Avenue) and State Highway 826 (Sunny Isles Boulevard) in North Miami
Beach, proceed east on State Highway 826 until it ends at the beach.  The bench
marks are located near the Newport Fishing Pier and along State Highways 826 and
A1A.  The tide gage and staff were located on the south side of the Newport
Fishing Pier.


                         T I D A L   B E N C H   M A R K S
                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  2 of  6

                                                                                
Station ID: 8723050                         PUBLICATION DATE:  05/06/2003
Name:       NORTH MIAMI BEACH                                 
            FL
NOAA Chart: 11466                           Latitude:   25° 55.8' N (  25.93000)
USGS Quad:  NORTH MIAMI                     Longitude:  80°  7.2' W ( -80.12000)


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


                 PRIMARY BENCH MARK STAMPING:  BMWCBM A 2 A-2
                         DESIGNATION:          A 2 DWC
                         ALIAS:                872 3050 TIDAL D CO

MONUMENTATION:           Survey disk                           VM#:         5756
AGENCY:                  Dade County                           IDB PID#:  AC2392
SETTING CLASSIFICATION:  Catch basin                           OPUS PID:        
LATITUDE:   25° 55.8' N (  25.93000)          LONGITUDE:  80°  7.3' W ( -80.12170)


The primary bench mark is a disk set on the top NW corner of a 1 m (4 ft) square
by a 1.37 m (4.5 ft) deep catch basin near the intersection of State Highways
826 and A1A, 13 m (43 ft) south of the south curb of State Highway 826, 1 m (3
ft) NW of the center of a manhole cover, 0.21 m (0.7 ft) east of the east curb
of State Highway A1A, and 0.15 m (0.5 ft) above the road surface.



                         BENCH MARK STAMPING:  NO 1 1973
                         DESIGNATION:          872 3050 TIDAL 1

MONUMENTATION:           Tidal Station disk                    VM#:         5752
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  AC3279
SETTING CLASSIFICATION:  Concrete manhole cover                OPUS PID:        
LATITUDE:   25° 55.8' N (  25.93000)          LONGITUDE:  80°  7.2' W ( -80.12000)


The bench mark is a disk set flush in the NW corner of a concrete manhole cover
near the foot of the Newport Fishing Pier, in line with the centerline of Sunny
Isles Boulevard, 17.13 m (56.2 ft) SW of the SW corner of a tackle shop, 10.33 m
(33.9 ft) north of a wire fence atop a seawall around the Castaways Hotel, and
0.30 m (1 ft) above ground level.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  3 of  6

                                                                                
Station ID: 8723050                         PUBLICATION DATE:  05/06/2003
Name:       NORTH MIAMI BEACH                                 
            FL
NOAA Chart: 11466                           Latitude:   25° 55.8' N (  25.93000)
USGS Quad:  NORTH MIAMI                     Longitude:  80°  7.2' W ( -80.12000)


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


                         BENCH MARK STAMPING:  NO 2 1973
                         DESIGNATION:          872 3050 TIDAL 2

MONUMENTATION:           Tidal Station disk                    VM#:         5753
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  AC3280
SETTING CLASSIFICATION:  Concrete sea wall                     OPUS PID:        
LATITUDE:   25° 55.8' N (  25.93000)          LONGITUDE:  80°  7.2' W ( -80.12000)


The bench mark is a disk set flush in a concrete sea wall just north of the
Castaways Hotel, 16.22 m (53.2 ft) SE of Bench Mark NO 1 1973, and 1.98 m (6.5
ft) east of the west end of the sea wall.



                         BENCH MARK STAMPING:  NO 3 1973
                         DESIGNATION:          872 3050 TIDAL 3

MONUMENTATION:           Tidal Station disk                    VM#:         5754
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  AC3278
SETTING CLASSIFICATION:  Concrete curb                         OPUS PID:        
LATITUDE:   25° 55.8' N (  25.93000)          LONGITUDE:  80°  7.2' W ( -80.12000)


The bench mark is a disk set flush in a concrete curb, 12.19 m (40.0 ft) north
of the centerline of Sunny Isles Boulevard, 4.27 m (14.0 ft) west of the center
of the entrance/exit gate to the Newport Fishing Pier, and 0.30 m (1 ft) above
the road surface.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  4 of  6

                                                                                
Station ID: 8723050                         PUBLICATION DATE:  05/06/2003
Name:       NORTH MIAMI BEACH                                 
            FL
NOAA Chart: 11466                           Latitude:   25° 55.8' N (  25.93000)
USGS Quad:  NORTH MIAMI                     Longitude:  80°  7.2' W ( -80.12000)


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


                         BENCH MARK STAMPING:  NO 4 1973
                         DESIGNATION:          872 3050 TIDAL 4

MONUMENTATION:           Tidal Station disk                    VM#:         5755
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  AC3277
SETTING CLASSIFICATION:  Concrete curb                         OPUS PID:        
LATITUDE:   25° 55.8' N (  25.93000)          LONGITUDE:  80°  7.2' W ( -80.12000)


The bench mark is a disk set flush in a concrete curb, 25.39 m (83.3 ft) west of
Bench Mark NO 3 1973, 14 m (46 ft) north of the centerline of State Highway 826
leading to the Newport Fishing Pier, 9.60 m (31.5 ft) south of the center of the
driveway leading to the parking area for Newport Hotel, 0.30 m (1 ft) above the
road surface, and at the SW corner of the south parking lot for the Newport
Hotel.



                         BENCH MARK STAMPING:  28.44
                         DESIGNATION:          28.44 FLHD

MONUMENTATION:           Survey disk                           VM#:         5757
AGENCY:                  Florida Highway Department (FLHD)     IDB PID#:  AC2395
SETTING CLASSIFICATION:  Sidewalk                              OPUS PID:        
LATITUDE:   25° 55.6' N (  25.92670)          LONGITUDE:  80°  8.1' W ( -80.13500)


The bench mark is a disk set in the concrete sidewalk at the north end of the 56
m (185 ft) long road bridge over the Oleta River, 0.24 km (0.15 mi) south of
State Highway 826, 2.80 m (9.2 ft) south of the north end of the west guard
rail, 0.30 m (1.0 ft) west of the west curb of the bridge, and 0.30 m (1.0 ft)
above the road surface.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  5 of  6

                                                                                
Station ID: 8723050                         PUBLICATION DATE:  05/06/2003
Name:       NORTH MIAMI BEACH                                 
            FL
NOAA Chart: 11466                           Latitude:   25° 55.8' N (  25.93000)
USGS Quad:  NORTH MIAMI                     Longitude:  80°  7.2' W ( -80.12000)


                            T I D A L   D A T U M S 


Tidal datums at NORTH MIAMI BEACH based on:

     LENGTH OF SERIES:      12 MONTHS
     TIME PERIOD:           May 1973 - April 1974
     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)         =  1.314
     MEAN HIGHER HIGH WATER                     MHHW   =  0.841
     MEAN HIGH WATER                            MHW    =  0.809
     North American Vertical Datum              NAVD88 =  0.727
     MEAN SEA LEVEL                             MSL    =  0.435
     MEAN TIDE LEVEL                            MTL    =  0.430
     MEAN LOW WATER                             MLW    =  0.051
     MEAN LOWER LOW WATER                       MLLW   =  0.000
     LOWEST  OBSERVED WATER LEVEL (06/29/1973)         = -0.426

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     BMWCBM A 2 A-2                              2.276    1.467
     NO 1 1973                                   3.405    2.596
     NO 2 1973                                   3.532    2.723
     NO 3 1973                                   3.708    2.899
     NO 4 1973                                   3.796    2.987
     28.44                                       8.889    8.080


                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  6 of  6

                                                                                
Station ID: 8723050                         PUBLICATION DATE:  05/06/2003
Name:       NORTH MIAMI BEACH                                 
            FL
NOAA Chart: 11466                           Latitude:   25° 55.8' N (  25.93000)
USGS Quad:  NORTH MIAMI                     Longitude:  80°  7.2' W ( -80.12000)


                             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.

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