U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 5
Station ID: 8652905 PUBLICATION DATE: 11/22/2013
Name: LAKE WORTH, STUMPY POINT BAY
NC
NOAA Chart: 12205 Latitude: 35° 41.9' N ( 35.69830)
USGS Quad: ENGELHARD NE Longitude: 75° 46.4' W ( -75.77330)
To reach the tidal bench marks from the intersection of US Highway 264 and
Bayview Drive (SR1100) in Stumpy Point, proceed south on US Highway 264 for 1.0
km (0.6 mi) to Captain Charlie's Seafood dock at Post 105. The marks are also
23.5 km (14.6 mi) south of Mann's Harbor on US Highway 264. The bench marks are
located along the highway in the vicinity of the seafood dock and the fire
tower. The tide gauge was located on the seafood dock.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 2905 A 2002
DESIGNATION: 865 2905 A
MONUMENTATION: Flange-encased Rod VM#: 16761
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Stainless steel rod in sleeve OPUS PID:
LATITUDE: 35° 41.9' N ( 35.69830) LONGITUDE: 75° 46.4' W ( -75.77330)
The primary bench mark is a flange-encased rod set in the north corner of the
property at Post 106 US Highway 264 behind a tan-colored, steel clad building,
17.13 m (56.2 ft) NE of a 1.0 m by 1.3 m (3.0 ft by 4.3 ft) wooden well pump
shed, 11.28 m (37.0 ft) NW of the NW corner of the tan, steel clad building, and
3.81 m (12.5 ft) SE of the south side of a small canal. The datum point is set
9 cm (0.3 ft) below grade, being the top of a stainless steel rod driven 24.7 m
(81 ft) to substantial resistance and encased in a 5-inch NOS logo cap.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 5
Station ID: 8652905 PUBLICATION DATE: 11/22/2013
Name: LAKE WORTH, STUMPY POINT BAY
NC
NOAA Chart: 12205 Latitude: 35° 41.9' N ( 35.69830)
USGS Quad: ENGELHARD NE Longitude: 75° 46.4' W ( -75.77330)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING:
DESIGNATION: 865 2905 BOLT
MONUMENTATION: Bolt VM#: 16760
AGENCY: Ocean Systems, Inc. (OSI) IDB PID#:
SETTING CLASSIFICATION: Bolt in fire tower foundation OPUS PID:
LATITUDE: 35° 41.9' N ( 35.69830) LONGITUDE: 75° 46.4' W ( -75.77330)
The bench mark is the top of a 1 3/8 inch bolt protruding upward from the 0.4 m
(1.3 ft) square tower foundation pier on the south corner of the fire lookout
tower and is marked on the top with a chiseled "X", on the grounds of the
maintenance yard of the North Carolina Forest Service shop located at Post 104
U.S. Highway 264 in Lake Worth, 22.46 m (73.7 ft) WNW of a flagpole, 16.73 m
(54.9 ft) west of the of the SW corner of the Forest Service garage, and 14.11 m
(46.3 ft) SE of the SE corner of a concrete block, oil containment wall, and 1 m
(3 ft) above grade.
BENCH MARK STAMPING: 2905 B 2002
DESIGNATION: 865 2905 B
MONUMENTATION: Flange-encased Rod VM#: 16762
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Stainless steel rod in sleeve OPUS PID:
LATITUDE: 35° 41.8' N ( 35.69670) LONGITUDE: 75° 46.4' W ( -75.77330)
The bench mark is a flange-encased rod set in the west corner of the property at
Post 106 US Highway 264, 33.53 m (110.0 ft) NW of a utility pole, 10.82 m (35.5
ft) SE of the south side of a small canal, and 8.41 m (27.6 ft) NE of the edge
of the large canal that intersects the small canal. The datum point is set 9 cm
(0.3 ft) below grade, being the top of a stainless steel rod driven 26.2 m (86
ft) to substantial resistance and encased in a 5-inch NOS logo cap.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 5
Station ID: 8652905 PUBLICATION DATE: 11/22/2013
Name: LAKE WORTH, STUMPY POINT BAY
NC
NOAA Chart: 12205 Latitude: 35° 41.9' N ( 35.69830)
USGS Quad: ENGELHARD NE Longitude: 75° 46.4' W ( -75.77330)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: TOWER 1974
DESIGNATION: TOWER 1974
MONUMENTATION: Traverse Station disk VM#: 16763
AGENCY: NC Geodetic Survey (NCGS) IDB PID#: EX0603
SETTING CLASSIFICATION: Concrete bridge curb OPUS PID:
LATITUDE: 35° 41.8' N ( 35.69670) LONGITUDE: 75° 46.4' W ( -75.77330)
The bench mark is a disk set flush in the concrete bridge curb at the SE corner
of the U.S. Highway 264 bridge that passes over a canal and is adjacent to
Captain Charlie's Seafood dock, 5.18 m (17.0 ft) SE of the centerline of the
highway, 2.04 m (6.7 ft) NE of the of the NE corner of the SE bridge rail, 0.3 m
(1 ft) west of the end of the SE bridge curb, and 0.21 m (0.7 ft) above grade.
BENCH MARK STAMPING: 2905 C 2002
DESIGNATION: 865 2905 C
MONUMENTATION: Flange-encased Rod VM#: 16764
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Stainless steel rod in sleeve OPUS PID:
LATITUDE: 35° 41.8' N ( 35.69670) LONGITUDE: 75° 46.4' W ( -75.77330)
The bench mark is a flange-encased rod set on the road shoulder, inside the
guard rail on the SE side of US Highway 264, 33.80 m (110.9 ft) WSW of the SW
corner of the highway bridge passing over the canal that is adjacent to Captain
Charlie's Seafood dock, 16.0 m (52.5 ft) SW of the utility pole at the
intersection of US Highway 264 and Lake Worth Road, and 4.88 m (16.0 ft) SE of
the centerline of the highway. The datum point is set 9 cm (0.3 ft) below
grade, being the top of a stainless steel rod driven 24.4 m (80 ft) to
substantial resistance and encased in a 5-inch NOS logo cap.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 5
Station ID: 8652905 PUBLICATION DATE: 11/22/2013
Name: LAKE WORTH, STUMPY POINT BAY
NC
NOAA Chart: 12205 Latitude: 35° 41.9' N ( 35.69830)
USGS Quad: ENGELHARD NE Longitude: 75° 46.4' W ( -75.77330)
T I D A L D A T U M S
Tidal datums at LAKE WORTH, STUMPY POINT BAY based on:
LENGTH OF SERIES: 4 MONTHS
TIME PERIOD: June 2002 - September 2002
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION: 8652587 OREGON INLET MARINA, PAMLICO SOUND
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
MEAN HIGHER HIGH WATER MHHW = 0.197
MEAN HIGH WATER MHW = 0.171
MEAN SEA LEVEL MSL = 0.103
MEAN TIDE LEVEL MTL = 0.101
MEAN LOW WATER MLW = 0.031
MEAN LOWER LOW WATER MLLW = 0.000
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
2905 A 2002 0.548 0.377
865 2905 BOLT 1.933 1.762
2905 B 2002 0.513 0.342
TOWER 1974 2.661 2.490
2905 C 2002 1.879 1.708
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 5
Station ID: 8652905 PUBLICATION DATE: 11/22/2013
Name: LAKE WORTH, STUMPY POINT BAY
NC
NOAA Chart: 12205 Latitude: 35° 41.9' N ( 35.69830)
USGS Quad: ENGELHARD NE Longitude: 75° 46.4' W ( -75.77330)
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.