Bench Mark Sheet for 8511671, Orient Harbor 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Superseded Epoch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Small blue map location marker Unpublished bench mark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: 8511671                         PUBLICATION DATE:  12/19/2011
Name:       ORIENT, ORIENT HARBOR                             
            NY
NOAA Chart: 12358                           Latitude:   41°  8.2' N (  41.13670)
USGS Quad:  ORIENT                          Longitude:  72° 18.4' W ( -72.30670)


To reach the tidal bench marks from the intersection of Main Road (State route
25) and Village Lane in Orient, NY, proceed south on Village lane for 0.64 km
(0.4 miles) to the Orient Yacht Club. The bench marks are on the Orient Yacht
Club Pier, along Village Lane and Main Road. The tide station is located on the
Orient Yacht Club 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  5

                                                                                
Station ID: 8511671                         PUBLICATION DATE:  12/19/2011
Name:       ORIENT, ORIENT HARBOR                             
            NY
NOAA Chart: 12358                           Latitude:   41°  8.2' N (  41.13670)
USGS Quad:  ORIENT                          Longitude:  72° 18.4' W ( -72.30670)


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


                 PRIMARY BENCH MARK STAMPING:  NO 1
                         DESIGNATION:          TIDAL 1 STA II 27

MONUMENTATION:           Tidal Station disk                    VM#:        20249
AGENCY:                  USC&GS                                IDB PID#:  LX0251
SETTING CLASSIFICATION:  Concrete monument                     OPUS PID:        
LATITUDE:   41°  8.2' N (  41.13646)          LONGITUDE:  72° 18.4' W ( -72.30623)


The primary bench mark is a USGS disk set on the top of a concrete protrusion on
the sea wall on the north face of the Orient Yacht Club pier, 13.95 m (45.8 ft)
west of a small hoist arm with winch, 11.85 m (38.9 ft) north of the south face
of the pier, 9.60 m (31.5 ft) east of the NE corner of the Yacht Club building,
0.38 m (1.2 ft) south of the north face of the pier, and protruding 0.06 m (0.2
ft) from the pier deck.

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

                                                                                
Station ID: 8511671                         PUBLICATION DATE:  12/19/2011
Name:       ORIENT, ORIENT HARBOR                             
            NY
NOAA Chart: 12358                           Latitude:   41°  8.2' N (  41.13670)
USGS Quad:  ORIENT                          Longitude:  72° 18.4' W ( -72.30670)


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


                         BENCH MARK STAMPING:  W372 1956
                         DESIGNATION:          W 372

MONUMENTATION:           Survey disk                           VM#:        20253
AGENCY:                  USC&GS                                IDB PID#:  LX0252
SETTING CLASSIFICATION:  Concrete monument                     OPUS PID:        
LATITUDE:   41°  8.6' N (  41.14306)          LONGITUDE:  72° 18.0' W ( -72.30035)


The bench mark is a USCGS disk in a concrete setting 30.15 m (98.9 ft) SE of
power pole number 180 185, 9.05 m (29.7 ft) south of the centerline of Highway
25 (Main Road), 7.60 m (24.9 ft) west of the centerline of Tabor Road, and
projecting 0.15 m (0.49 ft) above grade.

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

                                                                                
Station ID: 8511671                         PUBLICATION DATE:  12/19/2011
Name:       ORIENT, ORIENT HARBOR                             
            NY
NOAA Chart: 12358                           Latitude:   41°  8.2' N (  41.13670)
USGS Quad:  ORIENT                          Longitude:  72° 18.4' W ( -72.30670)


                            T I D A L   D A T U M S 


Tidal datums at ORIENT, ORIENT HARBOR based on:

     LENGTH OF SERIES:      3 MONTHS
     TIME PERIOD:           August 2011 - October 2011
     TIDAL EPOCH:           1983-2001
     CONTROL TIDE STATION:  8510560 MONTAUK, FORT POND BAY


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

     MEAN HIGHER HIGH WATER                     MHHW   =  0.925
     MEAN HIGH WATER                            MHW    =  0.827
     MEAN SEA LEVEL                             MSL    =  0.461
     MEAN TIDE LEVEL                            MTL    =  0.444
     MEAN LOW WATER                             MLW    =  0.060
     MEAN LOWER LOW WATER                       MLLW   =  0.000

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     NO 1                                        2.449    1.622
     W372 1956                                   5.696    4.869


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

                                                                                
Station ID: 8511671                         PUBLICATION DATE:  12/19/2011
Name:       ORIENT, ORIENT HARBOR                             
            NY
NOAA Chart: 12358                           Latitude:   41°  8.2' N (  41.13670)
USGS Quad:  ORIENT                          Longitude:  72° 18.4' W ( -72.30670)


                             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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