U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 5
Station ID: 8512987 PUBLICATION DATE: 02/05/2004
Name: NORTHVILLE FUEL DOCK, LONG ISLAND
NY
NOAA Chart: 12358 Latitude: 40° 58.9' N ( 40.98170)
USGS Quad: RIVERHEAD Longitude: 72° 38.7' W ( -72.64500)
To reach the tidal bench marks from State Highway 25 in River-head, proceed east
on State Highway 25 for 2.6 km (1.6 mi) to a stoplight, turn left onto Route
105-N and go 2.6 km (1.6 mi) to Route 43-E, turn right onto Route 43-E and go
0.8 km (0.5 mi) to Sound Road, turn right onto Sound Road and go 0.2 km (0.1 mi)
to Pennys Road, turn left onto Pennys Road and follow the curvy road for 2.6 km
(1.6 mi) to Northville Industries Corporations Riverhead Terminal. The bench
marks are along the beach on the north side of the property. The tide gauge was
on the fuel loading pier on the north side of the property.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 2987 A 1987
DESIGNATION: 851 2987 A
MONUMENTATION: Tidal Station disk VM#: 7409
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete cell OPUS PID:
LATITUDE: 40° 58.9' N ( 40.98170) LONGITUDE: 72° 38.7' W ( -72.64500)
The primary bench mark is a disk set flush on the first concrete cell from the
shore on the fuel loading pier, 4 m (13 ft) NW of the NW corner of a wood-framed
safety shack, 2.04 m (6.7 ft) south of the western bollard on the cell, and 0.46
m (1.5 ft) east of the west face of the cell.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 5
Station ID: 8512987 PUBLICATION DATE: 02/05/2004
Name: NORTHVILLE FUEL DOCK, LONG ISLAND
NY
NOAA Chart: 12358 Latitude: 40° 58.9' N ( 40.98170)
USGS Quad: RIVERHEAD Longitude: 72° 38.7' W ( -72.64500)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 2987 B 1987
DESIGNATION: 851 2987 B
MONUMENTATION: Tidal Station disk VM#: 7410
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete pad OPUS PID#: BBDC16
LATITUDE: 40° 58.9' N ( 40.98170) LONGITUDE: 72° 38.7' W ( -72.64500)
The bench mark is a disk set flush in a concrete pad at the foot of the fuel
loading pier, 13.66 m (44.8 ft) south of the south end of the steel pier, 10 m
(33 ft) north of a wood retaining wall at the foot of a hill, 3.26 m (10.7 ft)
SW of the SW corner of a 3 m x 2 m (10 ft x 8 ft) concrete building at the base
of the pier, 0.52 m (1.7 ft) east of a 0.30 m (1.0 ft) diameter gas pipeline
running along the west side of the pier, and 0.76 m (2.5 ft) feet below road
level.
BENCH MARK STAMPING: 2987 F 1999
DESIGNATION: 851 2987 F
MONUMENTATION: Tidal Station disk VM#: 15968
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Retaining wall OPUS PID:
LATITUDE: 40° 58.9' N ( 40.98170) LONGITUDE: 72° 38.7' W ( -72.64500)
The bench mark is a disk set in the retaining wall of a pump station, 10.38 m
(34.1 ft) north of the south corner of the pipeline retaining wall pit, 6.50 m
(21.3 ft) south of the bulkhead, and 4.82 m (15.8 ft) west of the steps leading
over the pipeline.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 5
Station ID: 8512987 PUBLICATION DATE: 02/05/2004
Name: NORTHVILLE FUEL DOCK, LONG ISLAND
NY
NOAA Chart: 12358 Latitude: 40° 58.9' N ( 40.98170)
USGS Quad: RIVERHEAD Longitude: 72° 38.7' W ( -72.64500)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 2987 G 1999
DESIGNATION: 851 2987 G
MONUMENTATION: Tidal Station disk VM#: 15969
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Retaining wall OPUS PID:
LATITUDE: 40° 58.9' N ( 40.98170) LONGITUDE: 72° 38.7' W ( -72.64500)
The bench mark is a disk set in the concrete retaining wall of a pipeline
switching station, 15.02 m (49.3 ft) east of the west end of the retaining wall,
3.07 m (10.1 ft) north of the SW corner of the pipeline switching station
building, and 0.32 m (1.0 ft) west of the east face of the building.
BENCH MARK STAMPING: 2987 H 1999
DESIGNATION: 851 2987 H
MONUMENTATION: Tidal Station disk VM#: 15970
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Retaining wall OPUS PID:
LATITUDE: 40° 58.9' N ( 40.98170) LONGITUDE: 72° 38.7' W ( -72.64500)
The bench mark is a disk set in the concrete curb of the pipeline retaining bin,
26.30 m (86.3 ft) east of the most easterly steps leading over the pipeline,
10.16 m (33.3 ft) NNW of the NE corner of the pipeline pump house, and 7.52 m
(24.7 ft) SW of the NE corner of the bulkhead.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 5
Station ID: 8512987 PUBLICATION DATE: 02/05/2004
Name: NORTHVILLE FUEL DOCK, LONG ISLAND
NY
NOAA Chart: 12358 Latitude: 40° 58.9' N ( 40.98170)
USGS Quad: RIVERHEAD Longitude: 72° 38.7' W ( -72.64500)
T I D A L D A T U M S
Tidal datums at NORTHVILLE FUEL DOCK, LONG ISLAND based on:
LENGTH OF SERIES: 1 YEAR
TIME PERIOD: September 1999 - August 2000
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION: 8467150 BRIDGEPORT, BRIDGEPORT HARBOR
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
HIGHEST OBSERVED WATER LEVEL (10/22/1988) = 2.650
MEAN HIGHER HIGH WATER MHHW = 1.792
MEAN HIGH WATER MHW = 1.698
MEAN TIDE LEVEL MTL = 0.882
MEAN SEA LEVEL MSL = 0.878
MEAN LOW WATER MLW = 0.066
MEAN LOWER LOW WATER MLLW = 0.000
LOWEST OBSERVED WATER LEVEL (02/09/1989) = -0.642
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
2987 A 1987 4.201 2.503
2987 B 1987 4.415 2.717
2987 F 1999 6.422 4.724
2987 G 1999 8.103 6.405
2987 H 1999 6.227 4.529
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 5
Station ID: 8512987 PUBLICATION DATE: 02/05/2004
Name: NORTHVILLE FUEL DOCK, LONG ISLAND
NY
NOAA Chart: 12358 Latitude: 40° 58.9' N ( 40.98170)
USGS Quad: RIVERHEAD Longitude: 72° 38.7' W ( -72.64500)
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.