U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 5
Station ID: 8538438 PUBLICATION DATE: 06/16/2004
Name: MANTUA
NJ
NOAA Chart: 12312 Latitude: 39° 47.7' N ( 39.79500)
USGS Quad: WOODBURY Longitude: 75° 10.6' W ( -75.17670)
To reach the tidal bench marks from the intersection of Berkley Road and Route
45 (Bridgeton Pike) in the village of Mantua, proceed WSW on Berkley Avenue for
0.5 km (0.3 mi) to Elm Avenue, then turn right and proceed north on West Elm
Street for 0.3 km (0.2 mi) to Glenwood Avenue, then turn right and proceed east
on Glenwood Avenue for 0.2 km (0.1 mi) to Ferndale Avenue, then turn left and
proceed 0.3 km (0.2 mi) north on Ferndale Avenue to its intersection with
Hickory Avenue (Crestmont Avenue). The bench marks are along Ferndale Avenue.
The tide gage and staff were on the bulkhead behind #239 Hickory Avenue.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 8438 A 1978
DESIGNATION: 853 8438 A TIDAL
MONUMENTATION: Tidal Station disk VM#: 2831
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Galvanized steel rod OPUS PID:
LATITUDE: 39° 47.8' N ( 39.79670) LONGITUDE: 75° 10.6' W ( -75.17670)
The primary bench mark is a disk located 15.33 m (50.3 ft) east of the SE corner
of the garage of the house at 239 Hickory (Crestmont) Avenue, 14.33 m (47.0 ft)
east of wood utility pole #3357, 11.80 m (38.7 ft) north of the centerline of
Cresmont Avenue, and 3.75 m (12.3 ft) east of the centerline of the sidewalk
leading to the house. The bench mark is set 6 cm (0.2 ft) below ground level,
crimped to the top of a galvanized steel rod driven 15.2 m (50 ft) 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 2 of 5
Station ID: 8538438 PUBLICATION DATE: 06/16/2004
Name: MANTUA
NJ
NOAA Chart: 12312 Latitude: 39° 47.7' N ( 39.79500)
USGS Quad: WOODBURY Longitude: 75° 10.6' W ( -75.17670)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 8438 B 1978
DESIGNATION: 853 8438 B TIDAL
MONUMENTATION: Tidal Station disk VM#: 2832
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Galvanized steel rod OPUS PID#: BBDC32
LATITUDE: 39° 47.8' N ( 39.79670) LONGITUDE: 75° 10.6' W ( -75.17670)
The bench mark is a disk located 58 m (190 ft) SW of bench mark 8438 A 1978,
24.84 m (81.5 ft) NW of a wood utility pole, 6.71 m (22.0 ft) west of the
centerline of Ferndale Avenue and 1.25 m (4.1 ft) east of the east end of a 1 m
(4 ft) high chain link fence. The bench mark is set 4 cm (0.12 ft) below ground
level, crimped to the top of a galvanized steel rod driven 15.2 m (50 ft) to
refusal, and encased in a PVC pipe and concrete kickblock.
BENCH MARK STAMPING: 8438 C 1978
DESIGNATION: 853 8438 C TIDAL
MONUMENTATION: Tidal Station disk VM#: 2833
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Galvanized steel rod OPUS PID:
LATITUDE: 39° 47.8' N ( 39.79670) LONGITUDE: 75° 10.6' W ( -75.17670)
The bench mark is a disk located 103 m (337 ft) south of bench mark 8438 B 1978,
6.86 m (22.5 ft) east of the centerline of Fernadale Avenue, 3.78 m (12.4 ft) SW
of a corner of a 2 m (5 ft) high wood rail fence, and 3.20 m (10.5 ft) north of
wood utility pole #PN 15227. The bench mark is set 6 cm (0.2 ft) below ground
level, crimped to the top of a galvanized steel rod driven 15.2 m (50 ft) 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 3 of 5
Station ID: 8538438 PUBLICATION DATE: 06/16/2004
Name: MANTUA
NJ
NOAA Chart: 12312 Latitude: 39° 47.7' N ( 39.79500)
USGS Quad: WOODBURY Longitude: 75° 10.6' W ( -75.17670)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 8438 D 1978
DESIGNATION: 853 8438 D TIDAL
MONUMENTATION: Tidal Station disk VM#: 2834
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Galvanized steel rod OPUS PID:
LATITUDE: 39° 47.8' N ( 39.79670) LONGITUDE: 75° 10.6' W ( -75.17670)
The bench mark is a disk located 89 m (292 ft) south of bench mark 8438 C 1978,
7.62 m (25.0 ft) south of the centerline of Glenwood Avenue, 5.94 m (19.5 ft)
west of the extended centerline of Ferndale Avenue, and 1.52 m (5.0 ft) east of
the NE corner of a 2 m (5 ft) high chain link fence. The bench mark is set 6 cm
(0.2 ft) below ground level, crimped to the top of a galvanized steel rod driven
15.2 m (50 ft) to refusal, and encased in a PVC pipe and concrete kickblock.
BENCH MARK STAMPING: 8438 E 1978
DESIGNATION: 853 8438 E TIDAL
MONUMENTATION: Tidal Station disk VM#: 2835
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Galvanized steel rod OPUS PID:
LATITUDE: 39° 47.8' N ( 39.79670) LONGITUDE: 75° 10.6' W ( -75.17670)
The bench mark is a disk located 64 m (210 ft) west of bench mark 8438 D 1978,
6.71 m (22.0 ft) south of the centerline of Glenwood Avenue, 1.92 m (6.3 ft) SW
of wood utility pole #PN 15223, and 1.58 m (5.2 ft) SE of a steel street
intersection signpost. The bench mark is set 6 cm (0.2 ft) below ground level,
crimped to the top of a galvanized steel rod driven 15.2 m (50 ft) 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 5
Station ID: 8538438 PUBLICATION DATE: 06/16/2004
Name: MANTUA
NJ
NOAA Chart: 12312 Latitude: 39° 47.7' N ( 39.79500)
USGS Quad: WOODBURY Longitude: 75° 10.6' W ( -75.17670)
T I D A L D A T U M S
Tidal datums at MANTUA based on:
LENGTH OF SERIES: 5 MONTHS
TIME PERIOD: May 1978 - September 1978
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION: 8545530 PHILADELPHIA (PIER 11 NORTH), DEL. RIVER
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
MEAN HIGHER HIGH WATER MHHW = 1.421
MEAN HIGH WATER MHW = 1.344
MEAN SEA LEVEL MSL = 0.841
MEAN TIDE LEVEL MTL = 0.705
MEAN LOW WATER MLW = 0.066
MEAN LOWER LOW WATER MLLW = 0.000
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
8438 A 1978 7.655 6.311
8438 B 1978 11.348 10.004
8438 C 1978 11.996 10.652
8438 D 1978 12.895 11.551
8438 E 1978 13.391 12.047
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 5
Station ID: 8538438 PUBLICATION DATE: 06/16/2004
Name: MANTUA
NJ
NOAA Chart: 12312 Latitude: 39° 47.7' N ( 39.79500)
USGS Quad: WOODBURY Longitude: 75° 10.6' W ( -75.17670)
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.