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Bench Mark Sheet for 8512671, Shinnecock Bay NY

Superseded Epoch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Small blue map location marker Unpublished bench mark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  5

                                                                                
Station ID: 8512671                         PUBLICATION DATE:  05/01/2003
Name:       SHINNECOCK BAY, INSIDE OUTER BAR                  
            NY
NOAA Chart: 12353                           Latitude:   40° 49.2' N (  40.82000)
USGS Quad:  QUOGUE                          Longitude:  72° 33.7' W ( -72.56170)


To reach the tidal bench marks from the south end of Quogue Beach bridge in the
village of Quogue proceed ENE on Dunes Road for 2.9 km (1.8 mi) to Dolphin
Marina on the north side of the road (across from Round Dune Co-op
Condominiums), turn left onto the sand entrance drive to the marina and continue
to the wooden bulkhead at the water's edge.  The bench marks are located in the
vicinity of the marina and along Dunes Road.  The tide gage and staff were
located on the NE corner of the bulkhead west of the boat ramp.


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


                 PRIMARY BENCH MARK STAMPING:  2671 A
                         DESIGNATION:          851 2671 A

MONUMENTATION:           Tidal Station disk                    VM#:         2291
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:        
SETTING CLASSIFICATION:  Concrete monument                     OPUS PID:        
LATITUDE:   40° 49.2' N (  40.82000)          LONGITUDE:  72° 33.7' W ( -72.56170)


The primary bench mark is a disk set in a concrete monument, 45.7 m (150 ft)
south of the boat ramp and wooden bulkhead at the marina, 1.5 m (5 ft) SE of the
SE corner of a shed, 0.88 m (2.9 ft) NW of the NW corner of a fence around the
tennis courts, and 0.55 m (1.8 ft) NW of a utility pole.

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

                                                                                
Station ID: 8512671                         PUBLICATION DATE:  05/01/2003
Name:       SHINNECOCK BAY, INSIDE OUTER BAR                  
            NY
NOAA Chart: 12353                           Latitude:   40° 49.2' N (  40.82000)
USGS Quad:  QUOGUE                          Longitude:  72° 33.7' W ( -72.56170)


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


                         BENCH MARK STAMPING:  2671 C
                         DESIGNATION:          851 2671 C

MONUMENTATION:           Tidal Station disk                    VM#:         2292
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:        
SETTING CLASSIFICATION:  Concrete monument                     OPUS PID:        
LATITUDE:   40° 49.2' N (  40.82000)          LONGITUDE:  72° 33.7' W ( -72.56170)


The bench mark is a disk set in a concrete monument east of the four 2-story
Round Dune Co-op Condominium buildings, 33.5 m (110 ft) south of Dunes Road,
2.38 m (7.8 ft) east of the centerline of the driveway on the east side of the
condominiums, and 0.85 m (2.8 ft) east of the east edge of the concrete curb on
the east side of the driveway.



                         BENCH MARK STAMPING:   
                         DESIGNATION:          851 2671 NO STAMPING 2

MONUMENTATION:           Drill Hole                            VM#:        16872
AGENCY:                                                        IDB PID#:        
SETTING CLASSIFICATION:  Drill hole                            OPUS PID:        
LATITUDE:   40° 49.2' N (  40.82000)          LONGITUDE:  72° 33.7' W ( -72.56170)


The bench mark is a drill hole set at the NE corner of the entrance to the
basement at the north side of the Sail Loft Restaurant

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

                                                                                
Station ID: 8512671                         PUBLICATION DATE:  05/01/2003
Name:       SHINNECOCK BAY, INSIDE OUTER BAR                  
            NY
NOAA Chart: 12353                           Latitude:   40° 49.2' N (  40.82000)
USGS Quad:  QUOGUE                          Longitude:  72° 33.7' W ( -72.56170)


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


                         BENCH MARK STAMPING:   
                         DESIGNATION:          851 2671 NO STAMPING 1

MONUMENTATION:           Bolt                                  VM#:        16874
AGENCY:                                                        IDB PID#:        
SETTING CLASSIFICATION:  Stainless steel lag bolt              OPUS PID:        
LATITUDE:   40° 49.2' N (  40.82000)          LONGITUDE:  72° 33.7' W ( -72.56170)


The bench mark is a stainless steel lag bolt in the side of a power pole located
on the east side of the entrance to Dolphin Marina from Tianna Beach Road, 6.6
km (4.1 mi) west of the Shinnecock Inlet Bridge, and 0.6 m (2 ft) above ground.

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

                                                                                
Station ID: 8512671                         PUBLICATION DATE:  05/01/2003
Name:       SHINNECOCK BAY, INSIDE OUTER BAR                  
            NY
NOAA Chart: 12353                           Latitude:   40° 49.2' N (  40.82000)
USGS Quad:  QUOGUE                          Longitude:  72° 33.7' W ( -72.56170)


                            T I D A L   D A T U M S 


Tidal datums at SHINNECOCK BAY, INSIDE OUTER BAR based on:

     LENGTH OF SERIES:      8 MONTHS
     TIME PERIOD:           February 1978 - September 1978
     TIDAL EPOCH:           1983-2001
     CONTROL TIDE STATION:  8518750 THE BATTERY, NEW YORK HARBOR


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

     MEAN HIGHER HIGH WATER                     MHHW   =  0.831
     MEAN HIGH WATER                            MHW    =  0.754
     MEAN TIDE LEVEL                            MTL    =  0.387
     MEAN SEA LEVEL                             MSL    =  0.373
     MEAN LOW WATER                             MLW    =  0.020
     MEAN LOWER LOW WATER                       MLLW   =  0.000

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     2671 A                                      1.872    1.118
     2671 C                                      2.245    1.491
     851 2671 NO STAMPING 2                      2.429    1.675
     851 2671 NO STAMPING 1                      2.109    1.355


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

                                                                                
Station ID: 8512671                         PUBLICATION DATE:  05/01/2003
Name:       SHINNECOCK BAY, INSIDE OUTER BAR                  
            NY
NOAA Chart: 12353                           Latitude:   40° 49.2' N (  40.82000)
USGS Quad:  QUOGUE                          Longitude:  72° 33.7' W ( -72.56170)


                             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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Revised: 08/08/2018
NOAA / National Ocean Service
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