U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 5
Station ID: 8534287 PUBLICATION DATE: 05/12/2004
Name: LITTLE SHEEPSHEAD CREEK
NJ
NOAA Chart: 12316 Latitude: 39° 31.3' N ( 39.52170)
USGS Quad: TUCKERTON Longitude: 74° 19.2' W ( -74.32000)
To reach the tidal bench marks from the Post Office at Tuckerton, proceed 0.5 km
(0.3 mi) south on Great Bay Boulevard, 122 m (400 ft) north of the bridge over
Little Sheepshead Creek. The bench marks are located along Great Bay Boulevard.
The tide gage and staff were located on a old warehouse pier.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: NO 1 1974
DESIGNATION: 853 4287 TIDAL 1
MONUMENTATION: Tidal Station disk VM#: 2671
AGENCY: National Ocean Survey (NOS) IDB PID#: JU0236
SETTING CLASSIFICATION: Concrete barge loading platform OPUS PID:
LATITUDE: 39° 31.1' N ( 39.51830) LONGITUDE: 74° 19.2' W ( -74.32000)
The primary bench mark is a disk set in the SE corner of a concrete barge
loading platform at the waters edge, 38.68 m (126.9 ft) SW of the SE corner of a
1-story fish products warehouse, 35.39 m (116.1 ft) west of wood utility pole
#P18927, 25.60 m (84.0 ft) west of the centerline of Great Bay Boulevard, 1.89 m
(6.2 ft) NE of a witness post, and 0.30 m (1.0 ft) NW of the SE corner of the
concrete platform.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 5
Station ID: 8534287 PUBLICATION DATE: 05/12/2004
Name: LITTLE SHEEPSHEAD CREEK
NJ
NOAA Chart: 12316 Latitude: 39° 31.3' N ( 39.52170)
USGS Quad: TUCKERTON Longitude: 74° 19.2' W ( -74.32000)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: P 55 1961
DESIGNATION: P 55
MONUMENTATION: Bench Mark disk VM#: 2670
AGENCY: US Coast & Geodetic Survey
(USC&GS) IDB PID#: JU0238
SETTING CLASSIFICATION: Clay pipe OPUS PID:
LATITUDE: 39° 31.5' N ( 39.52500) LONGITUDE: 74° 19.1' W ( -74.31830)
The bench mark is a disk set in a tile filled with concrete on top of a 1.5 m (5
ft) long cedar post located on the west side of Great Bay Boulevard, 12.65 m
(41.5 ft) east from the centerline of Great Bay Boulevard and approximately
midway between pole numbers P 18919 and P 18920 and 0.04 m (0.1 ft) above
ground.
BENCH MARK STAMPING: 4287 A 1976
DESIGNATION: 853 4287 A TIDAL
MONUMENTATION: Tidal Station disk VM#: 2672
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Copper clad steel rod OPUS PID:
LATITUDE: 39° 31.1' N ( 39.51830) LONGITUDE: 74° 19.2' W ( -74.32000)
The bench mark is a disk located 58.73 m (192.7 ft) SE of bench mark NO 1 1974,
52.12 m (171.0 ft) north of the south face of the north timber abutment of the
wooden bridge over Little Sheepshead Creek, 7.07 m (23.2 ft) east of the
centerline of Great Bay Boulevard, and 1.10 m (3.6 ft) south of wood utility
pole #P37918. The bench mark is set 6 cm (0.2 ft) below ground level, crimped
to the top of a copper-clad 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: 8534287 PUBLICATION DATE: 05/12/2004
Name: LITTLE SHEEPSHEAD CREEK
NJ
NOAA Chart: 12316 Latitude: 39° 31.3' N ( 39.52170)
USGS Quad: TUCKERTON Longitude: 74° 19.2' W ( -74.32000)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 4319 B 1976
DESIGNATION: 853 4287 4319 B TIDAL
MONUMENTATION: Tidal Station disk VM#: 2673
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Copper clad steel rod OPUS PID:
LATITUDE: 39° 31.1' N ( 39.51830) LONGITUDE: 74° 19.2' W ( -74.32000)
The bench mark is a disk located 15.18 m (49.8 ft) east of the SE corner of the
easterly end of the walkway leading to the former Little Egg Coast Guard
Station, 5.91 m (19.4 ft) east of the centerline of Great Bay Boulevard, and
1.80 m (5.9 ft) south of wood utility pole #T6619. The bench mark is set 6 cm
(0.2 ft) below ground level, crimped to the top of a copper-clad steel rod
driven 15.2 m (50 ft) to refusal, and encased in a PVC pipe and concrete
kickblock.
BENCH MARK STAMPING: 4319 C 1976
DESIGNATION: 853 4287 4319 C TIDAL
MONUMENTATION: Tidal Station disk VM#: 2674
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Copper clad steel rod OPUS PID:
LATITUDE: 39° 31.1' N ( 39.51830) LONGITUDE: 74° 19.2' W ( -74.32000)
The bench mark is a disk located 0.2 km (0.1 mi) north of bench mark 4319 B
1976,16.15 m (53.0 ft) NE of wood utility pole #P18944, and 5.70 m (18.7 ft)
east of the centerline of Great Bay Boulevard. The bench mark is set 6 cm (0.2
ft) below ground level, crimped to the top of a copper-clad 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: 8534287 PUBLICATION DATE: 05/12/2004
Name: LITTLE SHEEPSHEAD CREEK
NJ
NOAA Chart: 12316 Latitude: 39° 31.3' N ( 39.52170)
USGS Quad: TUCKERTON Longitude: 74° 19.2' W ( -74.32000)
T I D A L D A T U M S
Tidal datums at LITTLE SHEEPSHEAD CREEK based on:
LENGTH OF SERIES: 9 MONTHS
TIME PERIOD: March 1977 - November 1977
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 = 1.094
MEAN HIGH WATER MHW = 0.984
MEAN TIDE LEVEL MTL = 0.512
MEAN SEA LEVEL MSL = 0.503
MEAN LOW WATER MLW = 0.039
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 1 1974 2.108 1.124
P 55 1961 1.366 0.382
4287 A 1976 3.366 2.382
4319 B 1976 1.614 0.630
4319 C 1976 1.356 0.372
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 5
Station ID: 8534287 PUBLICATION DATE: 05/12/2004
Name: LITTLE SHEEPSHEAD CREEK
NJ
NOAA Chart: 12316 Latitude: 39° 31.3' N ( 39.52170)
USGS Quad: TUCKERTON Longitude: 74° 19.2' W ( -74.32000)
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.