U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 6
Station ID: 8656518 PUBLICATION DATE: 04/21/2003
Name: BEAUFORT, TAYLOR CREEK
NC
NOAA Chart: 11545 Latitude: 34° 42.7' N ( 34.71170)
USGS Quad: BEAUFORT Longitude: 76° 38.7' W ( -76.64500)
To reach the tidal bench marks from the intersection of US Highway 70 and
Lennoxville Road in Beaufort, proceed east on Lennoxville Road for 2.4 km (1.5
miles) to Ocean Drive, turn right on Ocean Drive and continue to Front Street,
then turn left on Front Street. The bench marks are located along Front Street,
Ocean Drive, and Lennoxville Road. The tide gage was located on a pier at No.
1607 Front Street.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 6518 A 1996
DESIGNATION: 865 6518 A
MONUMENTATION: Bench Mark disk VM#: 13329
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Stainless steel rod OPUS PID:
LATITUDE: 34° 42.7' N ( 34.71170) LONGITUDE: 76° 38.7' W ( -76.64500)
The primary bench mark is a disk set near No. 1607 Front Street, 49.83 m (163.5
ft) east of power pole No. NJP44, 4.79 m (15.7 ft) south of the centerline of
Front Street, and 0.88 m (2.9 ft) north of power pole No. NJP45 with a metal
witness post. The bench mark is 20 cm (0.6 ft) below ground level, crimped to a
stainless steel rod driven 11.0 m (36 ft) to refusal, and encased in a 5-inch
PVC pipe and concrete kickblock.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 6
Station ID: 8656518 PUBLICATION DATE: 04/21/2003
Name: BEAUFORT, TAYLOR CREEK
NC
NOAA Chart: 11545 Latitude: 34° 42.7' N ( 34.71170)
USGS Quad: BEAUFORT Longitude: 76° 38.7' W ( -76.64500)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 6518 B 1996
DESIGNATION: 865 6502 B
MONUMENTATION: Bench Mark disk VM#: 13330
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: In rock outcrop OPUS PID#: DJ9287
LATITUDE: 34° 42.7' N ( 34.71170) LONGITUDE: 76° 38.8' W ( -76.64670)
The bench mark is a disk set in a rock outcrop near No. 1605 Front Street, 13.41
m (44.0 ft) SW of power pole No. NJP44, 11.98 m (39.3 ft) south of the
centerline of Front Street, 2.65 m (8.7 ft) east of a white concrete wall, and
0.09 m (0.3 ft) above ground level.
BENCH MARK STAMPING: 6518 C 1996
DESIGNATION: 865 6502 C
MONUMENTATION: Bench Mark disk VM#: 13331
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete driveway OPUS PID:
LATITUDE: 34° 42.8' N ( 34.71330) LONGITUDE: 76° 38.8' W ( -76.64670)
The bench mark is a disk set in the concrete driveway at No. 102 Ocean Street, a
red brick house, 8.72 m (28.6 ft) east of the centerline of Ocean Street, 3.26 m
(10.7 ft) south of the north end of the house, and 0.21 m (0.7 ft) north of the
south edge of the driveway.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 6
Station ID: 8656518 PUBLICATION DATE: 04/21/2003
Name: BEAUFORT, TAYLOR CREEK
NC
NOAA Chart: 11545 Latitude: 34° 42.7' N ( 34.71170)
USGS Quad: BEAUFORT Longitude: 76° 38.7' W ( -76.64500)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 6518 D 1996
DESIGNATION: 865 6502 D
MONUMENTATION: Bench Mark disk VM#: 13332
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Stainless steel rod OPUS PID:
LATITUDE: 34° 42.8' N ( 34.71330) LONGITUDE: 76° 38.9' W ( -76.64830)
The bench mark is a disk set near the intersection of Lennoxville Road and Ocean
Street, in a grassy median between the road and a railroad track, 13.11 m (43.0
ft) SSW of the centerline of Lennoxville Road, 12.01 m (39.4 ft) east of the
centerline of Ocean Street, and 7.80 m (25.6 ft) north of the north rail of the
track. The bench mark is 9 cm (0.3 ft) below ground level, crimped to a
stainless steel rod driven 12.2 m (40 ft) to refusal, and encased in a 5-inch
PVC pipe and concrete kickblock.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 6
Station ID: 8656518 PUBLICATION DATE: 04/21/2003
Name: BEAUFORT, TAYLOR CREEK
NC
NOAA Chart: 11545 Latitude: 34° 42.7' N ( 34.71170)
USGS Quad: BEAUFORT Longitude: 76° 38.7' W ( -76.64500)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: CAR 50 1982
DESIGNATION: CAR 50 NCGS
MONUMENTATION: Survey disk VM#: 13333
AGENCY: North Carolina Geodetic Survey (NCGS) IDB PID#: EA1508
SETTING CLASSIFICATION: Concrete monument OPUS PID:
LATITUDE: 34° 42.9' N ( 34.71500) LONGITUDE: 76° 38.7' W ( -76.64500)
The bench mark is a disk set in a concrete monument, 0.2 km (0.1 mile) south of
the intersection of Lennoxville Road and Ocean Street, 11.89 m (39.0 ft) NE of
the centerline of Lennoxville Road, 6.64 m (21.8 ft) SW of the south rail of the
railroad track, 2.44 m (8.0 ft) NE of the SW corner of a chainlink fence, and
0.30 m (1.0 ft) NE of the fence.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 6
Station ID: 8656518 PUBLICATION DATE: 04/21/2003
Name: BEAUFORT, TAYLOR CREEK
NC
NOAA Chart: 11545 Latitude: 34° 42.7' N ( 34.71170)
USGS Quad: BEAUFORT Longitude: 76° 38.7' W ( -76.64500)
T I D A L D A T U M S
Tidal datums at BEAUFORT, TAYLOR CREEK based on:
LENGTH OF SERIES: 4 Months
TIME PERIOD: May 1996 - August 1996
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION: 8656483 BEAUFORT, DUKE MARINE LAB
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
MEAN HIGHER HIGH WATER MHHW = 0.979
MEAN HIGH WATER MHW = 0.902
MEAN SEA LEVEL MSL = 0.483
MEAN TIDE LEVEL MTL = 0.472
MEAN LOW WATER MLW = 0.043
MEAN LOWER LOW WATER MLLW = 0.000
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
6518 A 1996 2.649 1.747
6518 B 1996 1.806 0.904
6518 C 1996 4.329 3.427
6518 D 1996 4.131 3.229
CAR 50 1982 4.387 3.485
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 6
Station ID: 8656518 PUBLICATION DATE: 04/21/2003
Name: BEAUFORT, TAYLOR CREEK
NC
NOAA Chart: 11545 Latitude: 34° 42.7' N ( 34.71170)
USGS Quad: BEAUFORT Longitude: 76° 38.7' W ( -76.64500)
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.