U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 4
PUBLICATION DATE: 06/30/1992
Station ID: 8530550 SUPERCEDED DATE: 04/21/2003
Name: SECAUCUS, HACKENSACK RIVER
NEW JERSEY
NOAA Chart: 12337 Latitude: 40° 47.9' N
USGS Quad: WEEHAWKEN Longitude: 74° 4.2' W
To reach the tidal bench marks from Union City proceed NW on State Highway #3
for about 2.5 miles (4.0 km) to the bridge over the Hackensack River. The bench
marks are located on the east side of the river, from the highway south to the
Air Pilot Oil Company property. The tide gauge and staff were located on the
south end of the easternmost bridge cribwork.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: F 62 1962
MONUMENTATION: Survey Disk VM#: 11250
AGENCY: PID#: KV0465
SETTING CLASSIFICATION: Concrete Footing
The primary bench mark is set in the west corner of the concrete footing for the
second row of piers from the SE end of the State Highway #3 bridge over the
Hackensack River and about 1.0 foot (0.03 m) above ground level.
BENCH MARK STAMPING: G 62 1962
MONUMENTATION: Survey Disk VM#: 11251
AGENCY: PID#: KV0464
SETTING CLASSIFICATION: Concrete Step
The bench mark is set in the top of the concrete firewall that surrounds the Air
Pilot Oil Company oil tanks, about 525 feet (160 m) SW of the east end of the
State Highway #3 bridge over the Hackensack River, 105 feet (32 m) SE of the
south entrance to the main office building, 21 feet (7 m) west of the east end
of the firewall, and 1.5 feet (0.5 m) above ground level.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 4
PUBLICATION DATE: 06/30/1992
Station ID: 8530550 SUPERCEDED DATE: 04/21/2003
Name: SECAUCUS, HACKENSACK RIVER
NEW JERSEY
NOAA Chart: 12337 Latitude: 40° 47.9' N
USGS Quad: WEEHAWKEN Longitude: 74° 4.2' W
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: M 62 1962
MONUMENTATION: Survey Disk VM#: 11252
AGENCY: PID#: KV0463
SETTING CLASSIFICATION: Concrete Step
The bench mark is set in the southeast corner of the second concrete step at the
south entrance to the main office building, about 525 feet (160 m) SW of the
east end of the State Highway #3 bridge over the Hackensack River, 99 feet (30
m) NW of Bench Mark G 62 1962, 3 feet (0.9 m) south of the south side of the
main office building, and 1 foot (0.3 m) above ground level.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 4
PUBLICATION DATE: 06/30/1992
Station ID: 8530550 SUPERCEDED DATE: 04/21/2003
Name: SECAUCUS, HACKENSACK RIVER
NEW JERSEY
NOAA Chart: 12337 Latitude: 40° 47.9' N
USGS Quad: WEEHAWKEN Longitude: 74° 4.2' W
T I D A L D A T U M S
Tidal datums at SECAUCUS, HACKENSACK RIVER based on:
LENGTH OF SERIES: 3 MONTHS
TIME PERIOD: JULY - SEPTEMBER 1962
TIDAL EPOCH: 1960-1978
CONTROL TIDE STATION: 8518750 BATTERY
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in FEET:
HIGHEST OBSERVED WATER LEVEL (09/28/1962) = 6.60
MEAN HIGHER HIGH WATER MHHW = 5.76
MEAN HIGH WATER MHW = 5.45
* North American Vertical Datum NAVD88 = 3.41
MEAN TIDE LEVEL MTL = 2.86
* NATIONAL GEODETIC VERTICAL DATUM NGVD29 = 2.34
MEAN LOW WATER MLW = 0.26
MEAN LOWER LOW WATER MLLW = 0.00
LOWEST OBSERVED WATER LEVEL (08/16/1962) = -0.80
* NGVD reference based on elevations published in Quad 400741, 1992, and NOS
leveling of 1962.
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In FEET above:
Stamping or Designation MLLW MHW
F 62 1962 6.66 1.21
G 62 1962 10.72 5.27
M 62 1962 8.84 3.39
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 4
PUBLICATION DATE: 06/30/1992
Station ID: 8530550 SUPERCEDED DATE: 04/21/2003
Name: SECAUCUS, HACKENSACK RIVER
NEW JERSEY
NOAA Chart: 12337 Latitude: 40° 47.9' N
USGS Quad: WEEHAWKEN Longitude: 74° 4.2' 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 (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 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.