U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 5
Station ID: 8656306 PUBLICATION DATE: 04/21/2003
Name: MOREHEAD-BEAUFORT Y.C., NEWPORT RIVER
NC
NOAA Chart: 11545 Latitude: 34° 46.1' N ( 34.76830)
USGS Quad: CORE CREEK Longitude: 76° 40.3' W ( -76.67170)
To reach the tidal bench marks from the intersection of US Highway 70 and State
Highway 101 West in Beaufort, proceed 4.2 km (2.6 mi) west on State Highway 101
to Russell Creek Road, turn left and go 0.6 km (0.4 mi) to Cupid Road, turn left
and go 0.3 km (0.2 mi) on Rudolph Drive, turn right and go 0.3 km (0.2 mi) on
Island Drive to the entrance of the Morehead/Beaufort Yacht Club, then turn left
into the yacht club. The bench marks are located on the yacht club property. The
tide gage and staff were located behind the fish cleaning station on the right
side of the boat ramp.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 6306 C 1996
DESIGNATION: 865 6306 C
MONUMENTATION: Bench Mark disk VM#: 13167
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Stainless steel rod OPUS PID:
LATITUDE: 34° 46.1' N ( 34.76830) LONGITUDE: 76° 40.2' W ( -76.67000)
The primary bench mark is a disk set at the NE corner of the Morehead/Beaufort
Yacht Club building, 16.18 m (53.1 ft) SSE of the centerline of the road leading
to the marina, 14.63 m (48.0 ft) NE of the NW corner of the building, and 0.73 m
(2.4 ft) north of the SE corner of the building. The bench mark is set 15 cm
(0.5 ft) below grade, 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 2 of 5
Station ID: 8656306 PUBLICATION DATE: 04/21/2003
Name: MOREHEAD-BEAUFORT Y.C., NEWPORT RIVER
NC
NOAA Chart: 11545 Latitude: 34° 46.1' N ( 34.76830)
USGS Quad: CORE CREEK Longitude: 76° 40.3' W ( -76.67170)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 6306 A 1996
DESIGNATION: 865 6306 A
MONUMENTATION: Bench Mark disk VM#: 13164
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete sea wall OPUS PID:
LATITUDE: 34° 46.1' N ( 34.76830) LONGITUDE: 76° 40.3' W ( -76.67170)
The bench mark is a disk set flush in the NE corner of the concrete boat ramp at
the yacht club, 26.21 m (86.0 ft) NW of a white flagpole, 23.16 m (76.0 ft) SE
of electrical boxes, and 12.68 m (41.6 ft) north of a metal fish hoist on the
dock.
BENCH MARK STAMPING: 6306 B 1996
DESIGNATION: 865 6306 B
MONUMENTATION: Bench Mark disk VM#: 13165
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete pool pad OPUS PID:
LATITUDE: 34° 46.1' N ( 34.76830) LONGITUDE: 76° 40.3' W ( -76.67170)
The bench mark is a disk set flush in the NE corner of the concrete pool, 22.71
m (74.5 ft) NNW of the SW corner of the pool, 19.99 m (65.6 ft) SW of the NE
corner of the pool, and 1.86 m (6.1 ft) NE of the west side of a wood picket
fence.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 5
Station ID: 8656306 PUBLICATION DATE: 04/21/2003
Name: MOREHEAD-BEAUFORT Y.C., NEWPORT RIVER
NC
NOAA Chart: 11545 Latitude: 34° 46.1' N ( 34.76830)
USGS Quad: CORE CREEK Longitude: 76° 40.3' W ( -76.67170)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 6306 D 1996
DESIGNATION: 865 6306 D
MONUMENTATION: Bench Mark disk VM#: 13166
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Stainless steel rod OPUS PID:
LATITUDE: 34° 46.1' N ( 34.76830) LONGITUDE: 76° 40.2' W ( -76.67000)
The bench mark is a disk set at the north corner of the yacht club property,
16.86 m (55.3 ft) NNE of the curve in the yacht club road, 2.87 m (9.4 ft) SW of
the NE side of a wood picket fence, and 1.68 m (5.5 ft) SE of the NW side of the
fence. The bench mark is 9 cm (0.3 ft) below grade, 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.
BENCH MARK STAMPING: 6306 E 1996
DESIGNATION: 865 6306 E
MONUMENTATION: Bench Mark disk VM#: 13168
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Stainless steel rod OPUS PID#: DJ9290
LATITUDE: 34° 46.1' N ( 34.76909) LONGITUDE: 76° 40.2' W ( -76.67042)
The bench mark is a disk set at the entrance to the yacht club, 10.00 m (32.8
ft) west of the centerline of Island Road, 4.94 m (16.2 ft) north of the
centerline of the road leading to the marina, and 2.04 m (6.7 ft) east of the
west corner of a sign for the club. The bench mark is 9 cm (0.3 ft) below grade,
crimped to a stainless steel rod driven 11.0 meters (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 4 of 5
Station ID: 8656306 PUBLICATION DATE: 04/21/2003
Name: MOREHEAD-BEAUFORT Y.C., NEWPORT RIVER
NC
NOAA Chart: 11545 Latitude: 34° 46.1' N ( 34.76830)
USGS Quad: CORE CREEK Longitude: 76° 40.3' W ( -76.67170)
T I D A L D A T U M S
Tidal datums at MOREHEAD-BEAUFORT Y.C., NEWPORT RIVER 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 = 1.065
MEAN HIGH WATER MHW = 0.977
MEAN TIDE LEVEL MTL = 0.507
MEAN SEA LEVEL MSL = 0.505
MEAN LOW WATER MLW = 0.038
MEAN LOWER LOW WATER MLLW = 0.000
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
6306 C 1996 2.705 1.728
6306 A 1996 1.715 0.738
6306 B 1996 2.451 1.474
6306 D 1996 2.002 1.025
6306 E 1996 1.900 0.923
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 5
Station ID: 8656306 PUBLICATION DATE: 04/21/2003
Name: MOREHEAD-BEAUFORT Y.C., NEWPORT RIVER
NC
NOAA Chart: 11545 Latitude: 34° 46.1' N ( 34.76830)
USGS Quad: CORE CREEK Longitude: 76° 40.3' W ( -76.67170)
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.