U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 5
Station ID: 8517251 PUBLICATION DATE: 12/05/2014
Name: WORLDS FAIR MARINA, FLUSHING BAY
NY
NOAA Chart: 12339 Latitude: 40° 45.7' N ( 40.76100)
USGS Quad: FLUSHING Longitude: 73° 51.0' W ( -73.85036)
To reach the tide station from the interchange between the i-495 long island
expressway and grand central parkway in queens, proceed 0.9 km (0.6 mi) N on
grand central parkway, then stay right at the fork for grand central parkway W
(triboro bridge) and continue N 0.6 km (0.4 mi) to exit 9e for 25a N blvd, take
exit 9e and proceed N 0.2 km (0.1 mi) to the exit on the right for shea road,
take the exit and then turn left onto shea road and proceed 0.3 km (0.2 mi) NE
on shea road to an intersection, turn left at the intersection to continue on
shea road and proceed 0.2 km (0.1 mi) N to World s Fair Marina, turn right and
proceed east 0.1 km (0.1 mi) to the World s Fair Marina and the tide station on
the dock. The bench marks are along the marina bulkhead and near the marina
parking lots.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 7251 E 2014
DESIGNATION: 851 7251 E
MONUMENTATION: Flange-encased Rod VM#: 21042
AGENCY: National Ocean Service IDB PID#:
SETTING CLASSIFICATION: Stainless steel rod in sleeve OPUS PID#: BBDM37
LATITUDE: 40° 45.6' N ( 40.75969) LONGITUDE: 73° 50.9' W ( -73.84853)
The primary bench mark is a flange encased rod set in the grass at the E end of
the parking lot, 26.50 m (86.9 ft) NNW of an elevated highway concrete support
with drain pipe, 23.06 m (75.7 ft) ESE of the light pole near the end of the
sidewalk, 17.97 m (59.0 ft) WSW of the light pole along the roadway headed under
the elevated highway and 16.03 m (52.6 ft) NE of the S corner on the E side of
the parking lot.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 5
Station ID: 8517251 PUBLICATION DATE: 12/05/2014
Name: WORLDS FAIR MARINA, FLUSHING BAY
NY
NOAA Chart: 12339 Latitude: 40° 45.7' N ( 40.76100)
USGS Quad: FLUSHING Longitude: 73° 51.0' W ( -73.85036)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 7251 A 2014
DESIGNATION: 851 7251 A
MONUMENTATION: Bench Mark disk VM#: 21043
AGENCY: Naitonal Ocean Service IDB PID#:
SETTING CLASSIFICATION: Set in concrete retaining wall OPUS PID:
LATITUDE: 40° 45.6' N ( 40.76036) LONGITUDE: 73° 50.9' W ( -73.84822)
The bench mark is a disk set in the stone cap of the rock seawall embankment
along the promenade, 55.29 m (181.4 ft) NE of the SW end of the railing along
the promenade, 21.42 m (70.3 ft) WNW of the vehicle gate at the entrance to the
parking lot, 17.66 m (57.9 ft) NNE of lamp post fb053, 8.94 m (29.3 ft) N of the
water valve S of the benches, and 0.47 m (1.5 ft) NW of a post for the metal
railing along the promenade.
BENCH MARK STAMPING: 7251 B 2014
DESIGNATION: 851 7251 B
MONUMENTATION: Bench Mark disk VM#: 21044
AGENCY: National Ocean Service IDB PID#:
SETTING CLASSIFICATION: Concrete cap sheet pile seawall OPUS PID:
LATITUDE: 40° 45.6' N ( 40.76006) LONGITUDE: 73° 51.0' W ( -73.84947)
The bench mark is a disk set in a concrete ledge extending seaward from the
bulkhead W of the dock, 46.46 m (152.4 ft) NE of the bike rack at the W candela
structure, 32.77 m (107.5 ft) SSW of the center of the dock entrance gate, 12.31
m (40.4 ft) WSW of the base of the drinking fountain, 10.86 m (35.6 ft) N of
lamp post fb060 and 0.26 m (0.9 ft) NW of the metal railing.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 5
Station ID: 8517251 PUBLICATION DATE: 12/05/2014
Name: WORLDS FAIR MARINA, FLUSHING BAY
NY
NOAA Chart: 12339 Latitude: 40° 45.7' N ( 40.76100)
USGS Quad: FLUSHING Longitude: 73° 51.0' W ( -73.85036)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 7251 C 2014
DESIGNATION: 851 7251 C
MONUMENTATION: Bench Mark disk VM#: 21045
AGENCY: National Ocean Service IDB PID#:
SETTING CLASSIFICATION: Concrete cap sheet pile seawall OPUS PID:
LATITUDE: 40° 45.6' N ( 40.75944) LONGITUDE: 73° 51.1' W ( -73.85111)
The bench mark is a disk set in a concrete ledge extending seaward from the
bulkhead, 58.05 m (190.5 ft) W of the W leg of the sign along the promenade for
flushing meadows corona park with a map, 19.80 m (65.0 ft) NE of light post
fb080, 17.55 m (57.6 ft) N of a do not enter sign and 7.41 m (24.3 ft) NE of a
drinking fountain.
BENCH MARK STAMPING: 7251 D 2014
DESIGNATION: 851 7251 D
MONUMENTATION: Flange-encased Rod VM#: 21046
AGENCY: National Ocean Service IDB PID#:
SETTING CLASSIFICATION: Stainless steel rod in sleeve OPUS PID:
LATITUDE: 40° 45.5' N ( 40.75892) LONGITUDE: 73° 51.1' W ( -73.85142)
The bench mark is a flange encased rod set in the grass along the S side of the
entrance ramp to grand central parkway W, 49.10 m (161.1 ft) W of a circular
storm drain near the W end of the oval parking lot, 29.01 m (95.2 ft) NNE of
light pole WETERZN4B near the guardrail for grand central parkway, 19.68 m (64.6
ft) E of a 0.7 m (2.3 ft) diameter tree, 19.20 m (63.0 ft) S of the S metal post
for the grand central parkway W sign and 6.39 m (21.0 ft) S of the S edge of the
sidewalk.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 5
Station ID: 8517251 PUBLICATION DATE: 12/05/2014
Name: WORLDS FAIR MARINA, FLUSHING BAY
NY
NOAA Chart: 12339 Latitude: 40° 45.7' N ( 40.76100)
USGS Quad: FLUSHING Longitude: 73° 51.0' W ( -73.85036)
T I D A L D A T U M S
Tidal datums at WORLDS FAIR MARINA, FLUSHING BAY based on:
LENGTH OF SERIES: 3 MONTHS
TIME PERIOD: May 2014 - July 2014
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION: 8516945 KINGS POINT, LONG ISLAND SOUND
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
MEAN HIGHER HIGH WATER MHHW = 2.251
MEAN HIGH WATER MHW = 2.141
MEAN SEA LEVEL MSL = 1.119
MEAN TIDE LEVEL MTL = 1.113
MEAN LOW WATER MLW = 0.085
MEAN LOWER LOW WATER MLLW = 0.000
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
7251 E 2014 4.497 2.356
7251 A 2014 3.884 1.743
7251 B 2014 4.075 1.934
7251 C 2014 4.063 1.922
7251 D 2014 5.039 2.898
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 5
Station ID: 8517251 PUBLICATION DATE: 12/05/2014
Name: WORLDS FAIR MARINA, FLUSHING BAY
NY
NOAA Chart: 12339 Latitude: 40° 45.7' N ( 40.76100)
USGS Quad: FLUSHING Longitude: 73° 51.0' W ( -73.85036)
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.