U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 1 of 5
Station ID: 8652232 PUBLICATION DATE: 07/30/1999
Name: MANTEO, SHALLOWBAG BAY
NORTH CAROLINA
NOAA Chart: 12204 Latitude: 35ø 54.6' N
USGS Quad: MANTEO Longitude: 75ø 40.2' W
To reach the tidal bench marks from the U.S. Post Office in Manteo, proceed SE
to the waterfront Marina and Slip No. 14. The bench marks are in the vicinity
of the marina and along Queen Elizabeth Avenue. The tide gage and staff were
located at Slip No. 14.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 2232 A 1994
DESIGNATION: 865 2232 A TIDAL
MONUMENTATION: Tidal Station disk VM#: 1411
AGENCY: National Ocean Survey/Service (NOS) PID:
SETTING CLASSIFICATION: Concrete Doorway
The primary bench mark is a disk set flush in the concrete floor of the
Waterfront Condominium parking garage just inside the east entrance to the
garage, 18.59 m (61.0 ft) SE of a set of electrical meters inside the garage,
15.51 m (50.9 ft) WSW of boat slip No. 14, 13.69 m (44.9 ft) WSW of the east
face of the docks, 1.19 m (3.9 ft) west of the stairs leading to the
Dockmaster's Office, and 0.21 m (0.7 ft) below ground level outside the
garage.
BENCH MARK STAMPING: 2232 B 1994
DESIGNATION: 865 2232 B TIDAL
MONUMENTATION: Tidal Station disk VM#: 12653
AGENCY: National Ocean Survey/Service (NOS) PID:
SETTING CLASSIFICATION: Concrete Foundation
The bench mark is a disk set in an old 0.3 meter (1 ft) wide concrete foundation
on the NW side of the Meekins Building, 17.19 m (56.4 ft) south of the center
of the southernmost column marking the entrance to a parking lot, 9.39 m (30.8
ft) east of the centerline of Queen Elizabeth Avenue, 0.21 m (0.7 ft) NW of the
NW corner of the Meekins Building, and at ground level.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 5
Station ID: 8652232 PUBLICATION DATE: 07/30/1999
Name: MANTEO, SHALLOWBAG BAY
NORTH CAROLINA
NOAA Chart: 12204 Latitude: 35ø 54.6' N
USGS Quad: MANTEO Longitude: 75ø 40.2' W
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 2232 C 1994
DESIGNATION: 865 2232 C TIDAL
MONUMENTATION: Tidal Station disk VM#: 12654
AGENCY: National Ocean Survey/Service (NOS) PID:
SETTING CLASSIFICATION: Concrete Foundation
The bench mark is a disk set in a 1 m x 1 m x 0.55 m (4 ft x 4 ft x 1.8 ft)
concrete foundation for an electrical transformer in the NW corner of a parking
lot in downtown Manteo, 36.52 m (119.8 ft) SE of the SE corner of the Post
Office, 17.19 m (56.4 ft) WSW of the SW corner of the Tranquil House Inn, 9.69
m (31.8 ft) east of the centerline of Queen Elizabeth Avenue, and 0.55 m (1.8
ft) above ground level.
BENCH MARK STAMPING: 2232 D 1994
DESIGNATION: 865 2232 D TIDAL
MONUMENTATION: Tidal Station disk VM#: 12655
AGENCY: National Ocean Survey/Service (NOS) PID:
SETTING CLASSIFICATION: Concrete Bridge Abutment
The bench mark is a disk set flush in a concrete retaining wall on the south
side of the Cora Mae Daniels Basnight bridge, 40.81 m (133.9 ft) east of Queen
Elizabeth Avenue, 6.61 m (21.7 ft) north of the NE corner of the Tranquil House
Inn, 4.11 m (13.5 ft) south of the centerline of Ananias Street, and 0.64 m
(2.1 ft) above ground level.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 5
Station ID: 8652232 PUBLICATION DATE: 07/30/1999
Name: MANTEO, SHALLOWBAG BAY
NORTH CAROLINA
NOAA Chart: 12204 Latitude: 35ø 54.6' N
USGS Quad: MANTEO Longitude: 75ø 40.2' W
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: E 249 1949
DESIGNATION: E 249
MONUMENTATION: Vertical Control disk VM#: 12656
AGENCY: USC&GS PID#: EX0099
SETTING CLASSIFICATION: Concrete Step
The bench mark is a disk set on the east side of the bottom concrete step to the
bricked up south entrance to the Dare County Courthouse, 17.98 m (59.0 ft)
north of the centerline of Sir Walter Raleigh Street, 10.24 m (33.6 ft) west of
the SE corner of the Courthouse, and 5.52 m (18.1 ft) NE of the NE corner of
the main wall of a war memorial.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 5
Station ID: 8652232 PUBLICATION DATE: 07/30/1999
Name: MANTEO, SHALLOWBAG BAY
NORTH CAROLINA
NOAA Chart: 12204 Latitude: 35ø 54.6' N
USGS Quad: MANTEO Longitude: 75ø 40.2' W
T I D A L D A T U M S
Tidal datums at MANTEO, SHALLOWBAG BAY based on:
LENGTH OF SERIES: 4 MONTHS
TIME PERIOD: April 1994 - July 1994
TIDAL EPOCH: 1960-1978
CONTROL TIDE STATION: 8652587 OREGON INLET MARINA
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
HIGHEST OBSERVED WATER LEVEL (06/27/1994) = 0.610
MEAN HIGHER HIGH WATER (MHHW) = 0.146
MEAN HIGH WATER (MHW) = 0.132
MEAN TIDE LEVEL (MTL) = 0.084
MEAN SEA LEVEL (MSL) = 0.081
MEAN LOW WATER (MLW) = 0.036
MEAN LOWER LOW WATER (MLLW) = 0.000
LOWEST OBSERVED WATER LEVEL (04/23/1994) = -0.247
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
2232 A 1994 0.845 0.713
2232 B 1994 1.157 1.025
2232 C 1994 1.571 1.438
2232 D 1994 2.127 1.995
E 249 1949 1.396 1.264
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 5
Station ID: 8652232 PUBLICATION DATE: 07/30/1999
Name: MANTEO, SHALLOWBAG BAY
NORTH CAROLINA
NOAA Chart: 12204 Latitude: 35ø 54.6' N
USGS Quad: MANTEO Longitude: 75ø 40.2' W
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 (NAVD 88).
NGVD 29 is a fixed datum adopted as a national standard geodetic reference for
heights but is now considered superseded. NGVD 29 is sometimes referred to as
Sea Level Datum of 1929 or as Mean Sea Level on some early issues of Geological
Survey Topographic Quads. NGVD 29 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 NGVD 29 are available from the National
Geodetic Survey (NGS) data base via the World Wide Web at
National Geodetic Survey.
NAVD 88 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. NAVD 88 replaces NGVD 29 as the national
standard geodetic reference for heights. Bench mark elevations relative to
NAVD 88 are available from NGS through the World Wide Web at
National Geodetic Survey.
NGVD 29 and NAVD 88 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 NAVD 88 elevation is shown on the Elevations of Tidal Datums Table Referred
to MLLW only when two or more of the bench marks listed have NAVD 88 elevations.
The NAVD 88 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, NAVD 88 bench mark elevations computed indirectly from the tidal
datums elevation table may differ slightly from NAVD 88 elevations listed for
each bench mark in the NGS database.