U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 7
Station ID: 8536931 PUBLICATION DATE: 04/23/2012
Name: FORTESCUE CREEK
NJ
NOAA Chart: 12304 Latitude: 39° 14.3' N ( 39.23830)
USGS Quad: Fortescue Port Norris Longitude: 75° 10.5' W ( -75.17500)
To reach the tidal bench marks from the south end of the bridge over Fortescue
Creek turn right and proceed 0.5 km (0.3 mi) to U.S. Coast Guard station, the
gage and staff are located on the most easterly finger pier of Coast Guard dock.
The bench mark are located in the vicinity of the post office, and south along
New Jersey Avenue.
T I D A L B E N C H M A R K S
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 7
Station ID: 8536931 PUBLICATION DATE: 04/23/2012
Name: FORTESCUE CREEK
NJ
NOAA Chart: 12304 Latitude: 39° 14.3' N ( 39.23830)
USGS Quad: Fortescue Port Norris Longitude: 75° 10.5' W ( -75.17500)
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: NO 4 1953
DESIGNATION: TIDAL 4 STA 90
MONUMENTATION: Tidal Station disk VM#: 15519
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: JU1010
SETTING CLASSIFICATION: Concrete footing OPUS PID:
LATITUDE: 39° 14.3' N ( 39.23830) LONGITUDE: 75° 10.3' W ( -75.17170)
The primary bench mark is a disk set in the east portion of a concrete footing
of a television antenna on Andrew Gerod's property, 29.60 m (97.1 ft) NE of
centerline of Main Street, 22.95 m (75.3 ft) SW of centerline of Garrison
Avenue, 10.91 m (35.8 ft) SW from the south corner of a utility building at rear
of Andrew Gerod's property, and 5.79 m (19.0 ft) east of east corner of Andrew
Gerod's chimney.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 7
Station ID: 8536931 PUBLICATION DATE: 04/23/2012
Name: FORTESCUE CREEK
NJ
NOAA Chart: 12304 Latitude: 39° 14.3' N ( 39.23830)
USGS Quad: Fortescue Port Norris Longitude: 75° 10.5' W ( -75.17500)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: NO 2 1953
DESIGNATION: TIDAL 2 STA 90
MONUMENTATION: Tidal Station disk VM#: 15517
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: JU1009
SETTING CLASSIFICATION: Concrete footing OPUS PID:
LATITUDE: 39° 14.3' N ( 39.23830) LONGITUDE: 75° 10.3' W ( -75.17170)
The bench mark is a disk set flush in a drill hole at the NE side of a concrete
footing for a former sign post just SE of the Fortescue Post Office, 6.20 m
(20.3 ft) SW from the SW corner of the Post Office building, 6.70 m (22.0 ft)
east from the centerline of Garrison Avenue, 9.70 m (31.8 ft) north from the
centerline of Remington Drive, 14.90 m (48.9 ft) WSW from the flag pole on the
east side of the Post Office, 2.29 m (7.5 ft) NE from an inlet on the north side
of Remington Drive, 0.91 m (3.0 ft) NE from a 1.22 m (4.0 ft) high wood pile
painted white 12.0 m (39.4 ft) east from a nail in pole number 221 30 AMP, and
0.25 m (0.82 ft) below the ground.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 7
Station ID: 8536931 PUBLICATION DATE: 04/23/2012
Name: FORTESCUE CREEK
NJ
NOAA Chart: 12304 Latitude: 39° 14.3' N ( 39.23830)
USGS Quad: Fortescue Port Norris Longitude: 75° 10.5' W ( -75.17500)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: NO 3 1953
DESIGNATION: TIDAL 3 STA 90
MONUMENTATION: Tidal Station disk VM#: 15518
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: JU1011
SETTING CLASSIFICATION: Concrete footing OPUS PID:
LATITUDE: 39° 14.3' N ( 39.23830) LONGITUDE: 75° 10.4' W ( -75.17330)
The bench mark is a disk located in east portion of a concrete footing of the
chimney on north side of the Ronald Loper residence, 13.84 m (45.4 ft) NE of
centerline of Garrison Avenue, and 6.77 m (22.2 ft) SE of south corner of
Lillian Hamilton's store and residence.
BENCH MARK STAMPING: 6915 F 1977
DESIGNATION: 853 6915 F TIDAL
MONUMENTATION: Tidal Station disk VM#: 15520
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Galvanized steel rod OPUS PID:
LATITUDE: 39° 14.3' N ( 39.23830) LONGITUDE: 75° 10.5' W ( -75.17500)
The bench mark is a disk located on the west side of New Jersey Avenue, 0.6 km
(0.4 mi) SE of the intersection of New Jersey and Downe Avenues, 28 m (91 ft) NW
of utility pole #240, 23.62 m (77.5 ft) south of utility pole #239, 9.81 m (32.2
ft) SW of the "25 MPH Speed Limit" sign, and 5.30 m (17.4 ft) west of the
centerline of New Jersey Avenue. The bench mark is set 6 cm (0.2 ft) below
ground level, crimped to the top of a galvanized steel rod driven 12.2 m (40 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 5 of 7
Station ID: 8536931 PUBLICATION DATE: 04/23/2012
Name: FORTESCUE CREEK
NJ
NOAA Chart: 12304 Latitude: 39° 14.3' N ( 39.23830)
USGS Quad: Fortescue Port Norris Longitude: 75° 10.5' W ( -75.17500)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 6915 G 1977
DESIGNATION: 853 6915 G TIDAL
MONUMENTATION: Tidal Station disk VM#: 15521
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Galvanized steel rod OPUS PID:
LATITUDE: 39° 14.3' N ( 39.23830) LONGITUDE: 75° 10.5' W ( -75.17500)
The bench mark is a disk located on the east side of New Jersey Avenue, 0.6 km
(0.4 mi) SE of the intersection of New Jersey and Downe Avenues, 98 m (321 ft)
NE of bench mark 853 6915 F, 13.44 m (44.1 ft) south of wood utility pole #237,
6.19 m (20.3 ft) east of the centerline of New Jersey Avenue, and 3.11 m (10.2
ft) north of a wood corner post of a wire 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.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 7
Station ID: 8536931 PUBLICATION DATE: 04/23/2012
Name: FORTESCUE CREEK
NJ
NOAA Chart: 12304 Latitude: 39° 14.3' N ( 39.23830)
USGS Quad: Fortescue Port Norris Longitude: 75° 10.5' W ( -75.17500)
T I D A L D A T U M S
Tidal datums at FORTESCUE CREEK based on:
LENGTH OF SERIES: 2 MONTHS
TIME PERIOD: June 1984 - July 1984
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION: 8536110 CAPE MAY, CAPE MAY CANAL, DELAWARE BAY
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
MEAN HIGHER HIGH WATER MHHW = 1.960
MEAN HIGH WATER MHW = 1.836
North American Vertical Datum NAVD88 = 0.982
MEAN SEA LEVEL MSL = 0.974
MEAN TIDE LEVEL MTL = 0.944
MEAN LOW WATER MLW = 0.052
MEAN LOWER LOW WATER MLLW = 0.000
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
NO 4 1953 2.746 0.910
NO 2 1953 2.472 0.636
NO 3 1953 2.848 1.012
6915 F 1977 2.679 0.843
6915 G 1977 2.490 0.654
Foot Notes:
Bench marks 6915 F 1977 and 6915 G 1977 are based on one differential leveling
connection and do not meet the quality control standards of the NOS. Therefore,
caution should be used when deriving elevations for these marks.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 7 of 7
Station ID: 8536931 PUBLICATION DATE: 04/23/2012
Name: FORTESCUE CREEK
NJ
NOAA Chart: 12304 Latitude: 39° 14.3' N ( 39.23830)
USGS Quad: Fortescue Port Norris Longitude: 75° 10.5' W ( -75.17500)
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.