Superseded Bench Mark Sheet for 8534770, VENTNOR CITY, FISHING PIER NJ

Present Epoch

Printable version

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

                                                   PUBLICATION DATE:  06/05/1991
Station ID: 8534770                                SUPERCEDED DATE:   04/21/2003
Name:       VENTNOR FISHING PIER, ATLANTIC OCEAN              
            NEW JERSEY
NOAA Chart: 12318                                  Latitude:         39° 20.1' N
USGS Quad:  ATLANTIC CITY                          Longitude:        74° 28.6' W


To reach the tidal bench marks from the intersection of Atlantic and Cambridge
Avenues in the City of Ventnor, proceed south on Cambridge Avenue for two blocks
to Ventnor Fishing Pier.  The bench marks are along Cambridge, Atlantic, and
Suffolk Avenues.  The tide gage and electric tape gage are on the SW side of the
pier.


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


                 PRIMARY BENCH MARK STAMPING:  4770 A 1985

MONUMENTATION:           Survey Disk                               VM#:      339
AGENCY:                                                            PID:         
SETTING CLASSIFICATION:  Stainless Steel Rod


The primary bench mark is on the west side of Cambridge Avenue at the boardwalk,
82.5 feet (25.1 m) NNW of the north face of the boardwalk, 45.0 feet (13.7 m)
SSW of the metal light pole #A14767, 36.4 feet (11.1 m) ESE of the NE corner of
114 Cambridge Avenue, 29.3 feet (8.9 m) west of a fire hydrant, and 2.2 feet
(0.7 m) WSW of the curb.  The bench mark is 0.4 foot (0.1 m) below ground level,
crimped to a stainless steel rod driven 48 feet (15 m) to refusal, and encased
in a 5-inch PVC pipe and concrete kickblock.



                         BENCH MARK STAMPING:  F 56 1961

MONUMENTATION:           Survey Disk                               VM#:      340
AGENCY:                                                            PID#:  JU0326
SETTING CLASSIFICATION:  Brick Wall


The bench mark is set vertically in the SE corner of City Hall at the NW corner
of the intersection of Cambridge and Atlantic Avenues, 90.0 feet (27.4 m) WNW of
the centerline of Cambridge Avenue, 66.8 feet (20.4 m) NNW of the centerline of
Atlantic Avenue, 49.7 feet (15.1 m) SW of a flagpole, and 4.5 feet (1.4 m) above
ground level.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  2 of  5

                                                   PUBLICATION DATE:  06/05/1991
Station ID: 8534770                                SUPERCEDED DATE:   04/21/2003
Name:       VENTNOR FISHING PIER, ATLANTIC OCEAN              
            NEW JERSEY
NOAA Chart: 12318                                  Latitude:         39° 20.1' N
USGS Quad:  ATLANTIC CITY                          Longitude:        74° 28.6' W


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


                         BENCH MARK STAMPING:  4770 B 1985

MONUMENTATION:           Survey Disk                               VM#:      341
AGENCY:                                                            PID:         
SETTING CLASSIFICATION:  Stainless Steel Rod


The bench mark is on the south side of Atlantic Avenue between Dudley and
Dorsett Avenues, 125.7 feet (38.3 m) ENE of the centerline of Dorsett Avenue,
37.8 feet (11.5 m) SSE of the centerline of Atlantic Avenue, 27.0 feet (8.2 m)
WSW of power pole #606, 3.0 feet (0.9 m) SSE of the curb, and 2.0 feet (0.6 m)
NNE of the sidewalk.  The bench mark is 0.3 foot (0.1 m) below ground level,
crimped to a stainless steel rod driven 38 feet (12 m) to refusal, and encased
in a 5-inch PVC pipe and concrete kickblock. Note:  Letter B is illegible in
stamping.



                         BENCH MARK STAMPING:  4770 C 1985

MONUMENTATION:           Survey Disk                               VM#:      342
AGENCY:                                                            PID:         
SETTING CLASSIFICATION:  Concrete Wall


The bench mark is set vertically in a concrete wall on the west side of Suffolk
Avenue at the boardwalk, 144 feet (44 m) SSE of the SE corner of the tennis
courts, 65.0 feet (19.8 m) west of a fire hydrant, 45.0 feet (13.7 m) NNW of the
north face of the boardwalk, and 4.0 feet (1.2 m) above the sidewalk.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  3 of  5

                                                   PUBLICATION DATE:  06/05/1991
Station ID: 8534770                                SUPERCEDED DATE:   04/21/2003
Name:       VENTNOR FISHING PIER, ATLANTIC OCEAN              
            NEW JERSEY
NOAA Chart: 12318                                  Latitude:         39° 20.1' N
USGS Quad:  ATLANTIC CITY                          Longitude:        74° 28.6' W


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


                         BENCH MARK STAMPING:  STATION NO 4839

MONUMENTATION:           Survey Disk                               VM#:      343
AGENCY:                                                            PID#:  JU0325
SETTING CLASSIFICATION:  Concrete Monument


The bench mark is on the NW corner of the intersection of Suffolk and Atlantic
Avenues, 47.0 feet (14.3 m) NNW of the centerline of Atlantic Avenue, 38.4 feet
(11.7 m) east of the SE corner of 5501 Suffolk Avenue, 17.8 feet (5.4 m) WSW of
the centerline of Suffolk Avenue, 14.0 feet (4.3 m) north of power pole #A553,
and 0.1 foot (0.03 m) below ground level.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  4 of  5

                                                   PUBLICATION DATE:  06/05/1991
Station ID: 8534770                                SUPERCEDED DATE:   04/21/2003
Name:       VENTNOR FISHING PIER, ATLANTIC OCEAN              
            NEW JERSEY
NOAA Chart: 12318                                  Latitude:         39° 20.1' N
USGS Quad:  ATLANTIC CITY                          Longitude:        74° 28.6' W


                            T I D A L   D A T U M S 


Tidal datums at VENTNOR FISHING PIER, ATLANTIC OCEAN based on:

     LENGTH OF SERIES:      4 YEARS
     TIME PERIOD:           1986-1989
     TIDAL EPOCH:           1960-1978
     CONTROL TIDE STATION:  8557380 LEWES, DE


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

     HIGHEST OBSERVED WATER LEVEL (09/27/1985)         =   8.86
     MEAN HIGHER HIGH WATER                     MHHW   =   4.70
     MEAN HIGH WATER                            MHW    =   4.28
     MEAN TIDE LEVEL                            MTL    =   2.23
   * NATIONAL GEODETIC VERTICAL DATUM           NGVD29 =   1.58
     MEAN LOW WATER                             MLW    =   0.17
     MEAN LOWER LOW WATER                       MLLW   =   0.00
     LOWEST  OBSERVED WATER LEVEL (01/10/1986)         =  -2.40

   * NGVD reference based on elevations published in Quad 390742, 1967, and NOS
     leveling of 1990 
North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In FEET above:

     Stamping or Designation                    MLLW        MHW

     4770 A 1985                                10.65      6.37
     F 56 1961                                  17.68     13.40
     4770 B 1985                                12.30      8.02
     4770 C 1985                                14.47     10.19
     STATION NO 4839                            12.21      7.93


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

                                                   PUBLICATION DATE:  06/05/1991
Station ID: 8534770                                SUPERCEDED DATE:   04/21/2003
Name:       VENTNOR FISHING PIER, ATLANTIC OCEAN              
            NEW JERSEY
NOAA Chart: 12318                                  Latitude:         39° 20.1' N
USGS Quad:  ATLANTIC CITY                          Longitude:        74° 28.6' 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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