U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 5
Station ID: 8535001 PUBLICATION DATE: 06/16/2004
Name: CEDAR SWAMP, TUCKAHOE RIVER
NJ
NOAA Chart: 12318 Latitude: 39° 14.8' N ( 39.24670)
USGS Quad: MARMORA Longitude: 74° 43.1' W ( -74.71830)
To reach the tidal bench marks from the intersection of State Highway 585
(Dennisvillle Petersburg Road) and State Highway 50 in Petersburg, proceed 1.3
km (0.8 mi) ESE along State Highway 50 to the SW abutment of the bridge over
Cedar Swamp Creek. The bench marks are along State Highway 50. The tide gage
and staff were on a platform attached to the bridge over Cedar Swamp.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 5001 A 1978
DESIGNATION: 853 5001 A TIDAL
MONUMENTATION: Tidal Station disk VM#: 2745
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete abutment OPUS PID#: BBDC43
LATITUDE: 39° 14.8' N ( 39.24670) LONGITUDE: 74° 43.1' W ( -74.71830)
The primary bench mark is a disk set flush in the top of the concrete abutment,
51 m (168 ft) south of bench mark 5001 C 1978, 7.07 m (23.2 ft) SW of the
centerline of State Highway 50, 0.91 m (3.0 ft) SW of the concrete curb, and
0.34 m (1.1 ft) NE of the SW face of the abutment.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 5
Station ID: 8535001 PUBLICATION DATE: 06/16/2004
Name: CEDAR SWAMP, TUCKAHOE RIVER
NJ
NOAA Chart: 12318 Latitude: 39° 14.8' N ( 39.24670)
USGS Quad: MARMORA Longitude: 74° 43.1' W ( -74.71830)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 5001 B 1978
DESIGNATION: 853 5001 B TIDAL
MONUMENTATION: Tidal Station disk VM#: 2746
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete footing OPUS PID:
LATITUDE: 39° 14.8' N ( 39.24670) LONGITUDE: 74° 43.1' W ( -74.71830)
The bench mark is a disk set flush in the top of a concrete footing for an old
building on the east side of the Penn Reading Seashore Line railroad tracks, 84
m (275 ft) SE of bench mark 5001 A 1978, 11.31 m (37.1 ft) NW of a wood utility
pole, 3 m (10 ft) south of the westernmost corner of the concrete footing, 2.29
m (7.5 ft) NE of the east rail of the railroad track, and 0.85 m (2.8 ft) west
of the mid SE corner of the footing.
BENCH MARK STAMPING: 5001 C 1978
DESIGNATION: 853 5001 C TIDAL
MONUMENTATION: Tidal Station disk VM#: 2747
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete abutment OPUS PID:
LATITUDE: 39° 14.8' N ( 39.24670) LONGITUDE: 74° 43.1' W ( -74.71830)
The bench mark is a disk set flush in the top of the NE concrete abutment for
the bridge over Cedar Swamp Creek, 62 m (204 ft) SE of bench mark 5001 D 1978,
7.10 m (23.3 ft) NE of the centerline of State Highway 50, 0.91 m (3.0 ft) NE of
the concrete curb, and 0.34 m (1.1 ft) SE of the NE face of the abutment.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 5
Station ID: 8535001 PUBLICATION DATE: 06/16/2004
Name: CEDAR SWAMP, TUCKAHOE RIVER
NJ
NOAA Chart: 12318 Latitude: 39° 14.8' N ( 39.24670)
USGS Quad: MARMORA Longitude: 74° 43.1' W ( -74.71830)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 5001 D 1978
DESIGNATION: 853 5001 D TIDAL
MONUMENTATION: Tidal Station disk VM#: 2748
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Galvanized steel rod OPUS PID:
LATITUDE: 39° 14.8' N ( 39.24670) LONGITUDE: 74° 43.1' W ( -74.71830)
The bench mark is a disk located 24.69 m (81.0 ft) SE of a wood utility pole,
14.81 m (48.6 ft) west of wood utility pole #177, 7.68 m (25.2 ft) SW of the
centerline of State Highway 50, 2.29 m (7.5 ft) west of the SE end of a steel
guard rail, and 1.19 m (3.9 ft) SW of a steel guard rail. 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: 5001 E 1978
DESIGNATION: 853 5001 E TIDAL
MONUMENTATION: Tidal Station disk VM#: 2749
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Galvanized steel rod OPUS PID:
LATITUDE: 39° 14.8' N ( 39.24670) LONGITUDE: 74° 43.1' W ( -74.71830)
The bench mark is a disk located 102 m (336 ft) NW of bench mark 5001 D 1978, 7
m (23 ft) SW of the centerline of State Highway 50, 5.49 m (18.0 ft) north of a
6 cm (0.2 ft) diameter cedar tree, 1.16 m (3.8 ft) west of a steel sign reading
"Bridge May Be Slippery," and 0.58 m (1.9 ft) SW of a steel guard rail. 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: 8535001 PUBLICATION DATE: 06/16/2004
Name: CEDAR SWAMP, TUCKAHOE RIVER
NJ
NOAA Chart: 12318 Latitude: 39° 14.8' N ( 39.24670)
USGS Quad: MARMORA Longitude: 74° 43.1' W ( -74.71830)
T I D A L D A T U M S
Tidal datums at CEDAR SWAMP, TUCKAHOE RIVER based on:
LENGTH OF SERIES: 5 MONTHS
TIME PERIOD: June 1978 - October 1978
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION: 8557380 LEWES, FT. MILES
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
MEAN HIGHER HIGH WATER MHHW = 1.054
MEAN HIGH WATER MHW = 0.990
MEAN SEA LEVEL MSL = 0.671
MEAN TIDE LEVEL MTL = 0.534
MEAN LOW WATER MLW = 0.078
MEAN LOWER LOW WATER MLLW = 0.000
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
5001 A 1978 3.010 2.020
5001 B 1978 1.811 0.821
5001 C 1978 3.011 2.021
5001 D 1978 2.095 1.105
5001 E 1978 2.253 1.263
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 5
Station ID: 8535001 PUBLICATION DATE: 06/16/2004
Name: CEDAR SWAMP, TUCKAHOE RIVER
NJ
NOAA Chart: 12318 Latitude: 39° 14.8' N ( 39.24670)
USGS Quad: MARMORA Longitude: 74° 43.1' W ( -74.71830)
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.