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.