U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 6
PUBLICATION DATE: 05/25/1988
Station ID: 8530985 SUPERCEDED DATE: 04/21/2003
Name: CONSTABLE HOOK, UPPER BAY
NEW JERSEY
NOAA Chart: 12334 Latitude: 40° 39.3' N
USGS Quad: JERSEY CITY Longitude: 74° 5.2' W
To reach the tidal bench marks from Jersey City south along Interstate Highway
78, take exit 14A south on State Highway 169 to Bayonne and proceed 1.6 miles
(2.6 km) SE along the extension of East Street from Public School No. 5, at
Constable Hook, to the docks of the Exxon Oil Company. The bench marks are in
the near area, and the gage and staff were on the north side and inner end of
Pier No. 7.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: NO 6 1951
MONUMENTATION: Survey Disk VM#: 2498
AGENCY: PID#: KV0611
SETTING CLASSIFICATION: Concrete Sea Wall
The bench mark is set in the top of the concrete sea wall between Piers No. 6
and No. 7 at the Exxon Oil Company plant, 140.0 feet (42.7 m) north of the north
face of Pier No. 6, 30.0 feet (9.1 m) ESE of a three valve fire hydrant, 25.0
feet (7.6 m) south of the most southern oil drumrack, 22.0 feet (6.7 m) east of
an angle in the sea wall, and at dock level.
BENCH MARK STAMPING: NO 3 1932
MONUMENTATION: Survey Disk VM#: 2495
AGENCY: PID#: KV0609
SETTING CLASSIFICATION: Concrete Mooring Bit Base
The bench mark is on the dock of the Exxon Oil Company, set in the top of the
north edge of the concrete base of the NW one of a row of mooring bitts along
the NE side of Pier No. 5, at the inshore end of Pier No. 5, 2.0 feet (0.6 m)
north of the mooring bit, and level with the dock.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 6
PUBLICATION DATE: 05/25/1988
Station ID: 8530985 SUPERCEDED DATE: 04/21/2003
Name: CONSTABLE HOOK, UPPER BAY
NEW JERSEY
NOAA Chart: 12334 Latitude: 40° 39.3' N
USGS Quad: JERSEY CITY Longitude: 74° 5.2' W
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: NO 4 1949
MONUMENTATION: Survey Disk VM#: 2496
AGENCY: PID#: KV0610
SETTING CLASSIFICATION: Raised Concrete Pad
The bench mark is on the docks of the Exxon Oil Company, at the inshore end of
Pier No. 6, set into a raised part at the SW edge of a short concrete walk at
the west corner of Pier No. 6, 4.0 feet (1.2 m) NW of the bulkhead, 3.0 feet
(0.9 m) SW of the extended SW edge of the pier, and at pier level.
BENCH MARK STAMPING: NO 5 1949
MONUMENTATION: Survey Disk VM#: 2497
AGENCY: PID#: KV0613
SETTING CLASSIFICATION: Concrete Doorsill
The bench mark is near the docks of the Exxon Oil Company, between Piers No. 6
and No. 7, set in the top of the sill to the east one of four small doors
leading to the walkway inside the oil separating basin, 54.0 feet (16.5 m) north
of a two valve fire hydrant, 48.0 feet (14.6 m) west of the SE corner of the
basin, and 1.0 foot (0.3 m) above the deck level.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 6
PUBLICATION DATE: 05/25/1988
Station ID: 8530985 SUPERCEDED DATE: 04/21/2003
Name: CONSTABLE HOOK, UPPER BAY
NEW JERSEY
NOAA Chart: 12334 Latitude: 40° 39.3' N
USGS Quad: JERSEY CITY Longitude: 74° 5.2' W
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 0985 F 1976
MONUMENTATION: Survey Disk VM#: 2499
AGENCY: PID:
SETTING CLASSIFICATION: Copper-clad Steel Rod
The bench mark is between Pier No. 6 and 7, 143.4 feet (43.7 m) NE of a small
one story building at the Exxon Oil Company, 86.8 feet (26.5 m) NE of the SE
corner of the remains of an oil separating basin, 83.5 feet (25.4 m) SW of a
fire hydrant located just south of Pier No. 7, and 30.0 feet (9.1 m) west of the
shoreline. The bench mark is 0.2 foot (0.1 m) below ground level, crimped to a
copper-clad steel rod driven 50 feet (15 m), and encased in a PVC pipe and
concrete kickblock.
BENCH MARK STAMPING: 0985 I 1976
MONUMENTATION: Survey Disk VM#: 2500
AGENCY: PID:
SETTING CLASSIFICATION: Copper-clad Steel Rod
The bench mark is at the Exxon Oil Company, south of Pier No. 7, 52.8 feet (16.1
m) NW of the NW corner of an oil separating basin, 25.1 feet (7.6 m) north of
the north corner of a concrete base of a manhole, and 3.4 feet (1.0 m) south of
the corner of a 7-foot (2 m) high chain link fence. The bench mark is 0.2 foot
(0.1 m) below ground level, crimped to a copper-clad steel rod driven 36 feet
(11 m) to refusal, and encased in a PVC pipe and concrete kickblock.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 6
PUBLICATION DATE: 05/25/1988
Station ID: 8530985 SUPERCEDED DATE: 04/21/2003
Name: CONSTABLE HOOK, UPPER BAY
NEW JERSEY
NOAA Chart: 12334 Latitude: 40° 39.3' N
USGS Quad: JERSEY CITY Longitude: 74° 5.2' W
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: NO STAMPING 1
MONUMENTATION: Survey Disk VM#: 2501
AGENCY: PID:
SETTING CLASSIFICATION: Concrete Step of Sea Wall
The bench mark is in the top step of the concrete sea wall between Piers No. 6
and No. 7 on the dock of the Exxon Oil Company, at this area built in tiers,
190.0 feet (57.9 m) SW of the inshore end (SW corner) of Pier 7, 75.0 feet (22.9
m) east of Bench Mark NO 5 1949, 30.0 feet (9.1 m) SE of the SE corner of the
concrete waste oil separating basin, 9.0 feet (2.7 m) east of the north end of a
wood bulkhead, and at dock level.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 6
PUBLICATION DATE: 05/25/1988
Station ID: 8530985 SUPERCEDED DATE: 04/21/2003
Name: CONSTABLE HOOK, UPPER BAY
NEW JERSEY
NOAA Chart: 12334 Latitude: 40° 39.3' N
USGS Quad: JERSEY CITY Longitude: 74° 5.2' W
T I D A L D A T U M S
Tidal datums at CONSTABLE HOOK, UPPER BAY based on:
LENGTH OF SERIES: 9 MONTHS
TIME PERIOD: MARCH - NOVEMBER 1976
TIDAL EPOCH: 1960-1978
CONTROL TIDE STATION: 8518750 THE BATTERY, NY
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in FEET:
HIGHEST OBSERVED WATER LEVEL (03/16/1976) = 7.33
MEAN HIGHER HIGH WATER (MHHW) = 5.19
MEAN HIGH WATER (MHW) = 4.86
MEAN TIDE LEVEL (MTL) = 2.54
* NATIONAL GEODETIC VERTICAL DATUM-1929 (NGVD) = 1.83
MEAN LOW WATER (MLW) = 0.23
MEAN LOWER LOW WATER (MLLW) = 0.00
LOWEST OBSERVED WATER LEVEL (03/17/1976) = -3.27
* NGVD reference based on adjustment of 1929 and NOS levels of 5/19/80.
National Geodetic Vertical Datum (NGVD 29)
Bench Mark Elevation Information In FEET above:
Stamping or Designation MLLW MHW
NO 6 1951 10.62 5.76
NO 3 1932 11.66 6.80
NO 4 1949 11.68 6.82
NO 5 1949 11.08 6.22
0985 F 1976 10.51 5.65
0985 I 1976 10.84 5.98
NO STAMPING 1 10.17 5.31
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 6
PUBLICATION DATE: 05/25/1988
Station ID: 8530985 SUPERCEDED DATE: 04/21/2003
Name: CONSTABLE HOOK, UPPER BAY
NEW JERSEY
NOAA Chart: 12334 Latitude: 40° 39.3' N
USGS Quad: JERSEY CITY Longitude: 74° 5.2' W
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 (NAVD 88).
NGVD 29 is a fixed datum adopted as a national standard geodetic reference for
heights but is now considered superseded. NGVD 29 is sometimes referred to as
Sea Level Datum of 1929 or as Mean Sea Level on some early issues of Geological
Survey Topographic Quads. NGVD 29 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 NGVD 29 are available from the National
Geodetic Survey (NGS) data base via the World Wide Web at
National Geodetic Survey.
NAVD 88 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. NAVD 88 replaces NGVD 29 as the national
standard geodetic reference for heights. Bench mark elevations relative to
NAVD 88 are available from NGS through the World Wide Web at
National Geodetic Survey.
NGVD 29 and NAVD 88 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 NAVD 88 elevation is shown on the Elevations of Tidal Datums Table Referred
to MLLW only when two or more of the bench marks listed have NAVD 88 elevations.
The NAVD 88 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, NAVD 88 bench mark elevations computed indirectly from the tidal
datums elevation table may differ slightly from NAVD 88 elevations listed for
each bench mark in the NGS database.