U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 5
Station ID: 8639208 PUBLICATION DATE: 08/03/2004
Name: VIRGINIA BEACH, RUDEE INLET
VA
NOAA Chart: 12207 Latitude: 36° 49.9' N ( 36.83170)
USGS Quad: VIRGINA BEACH Longitude: 75° 58.1' W ( -75.96830)
To reach the tidal bench marks from the main post office in Virginia Beach at
24th Street and Atlantic Avenue, proceed south on Atlantic Avenue for 2.4 km
(1.5 mi) to the Virginia Beach Steel Pier just north of Rudee Inlet. The bench
marks are east of Atlantic Avenue between 15th Street and the pier. The tide
station was at the offshore end on the south side of the pier.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: NO 4 1960
DESIGNATION: 863 9208 TIDAL 4
MONUMENTATION: Tidal Station disk VM#: 3509
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#:
SETTING CLASSIFICATION: Concrete sea wall OPUS PID:
LATITUDE: 36° 49.9' N ( 36.83170) LONGITUDE: 75° 58.1' W ( -75.96830)
The primary bench mark is a disk set in a concrete seawall in the center of a
set of steps leading down to the beach at the end of 8th Street, 30.39 m (99.7
ft) SE of the SE corner of a red brick motel, and 7.62 m (25.0 ft) east of a
lamp pole.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 5
Station ID: 8639208 PUBLICATION DATE: 08/03/2004
Name: VIRGINIA BEACH, RUDEE INLET
VA
NOAA Chart: 12207 Latitude: 36° 49.9' N ( 36.83170)
USGS Quad: VIRGINA BEACH Longitude: 75° 58.1' W ( -75.96830)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: NO 1 1951
DESIGNATION: 863 9208 TIDAL 1
MONUMENTATION: Tidal Station disk VM#: 3507
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: FW0110
SETTING CLASSIFICATION: Concrete Monument OPUS PID:
LATITUDE: 36° 50.5' N ( 36.84170) LONGITUDE: 75° 58.4' W ( -75.97330)
The bench mark is a disk set flush in the top of a concrete cap rail on the sea
wall just south of a wooden fishing pier, 33.99 m (111.5 ft) NE of the NE corner
of the brick porch of Casino Bath House, 31.46 m (103.2 ft) SE of the SE corner
of Casino Dancing Hall, 7 m (22 ft) south of the centerline of the fishing pier,
2 m (6 ft) north of the north edge of the concrete steps to the beach, and 0.15
m (0.5 ft) west of the face of the cap rail.
BENCH MARK STAMPING: E 311 1952
DESIGNATION: 863 9208 E 311
MONUMENTATION: Bench Mark disk VM#: 3508
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: FW0083
SETTING CLASSIFICATION: Concrete curb OPUS PID:
LATITUDE: 36° 50.2' N ( 36.83670) LONGITUDE: 75° 58.3' W ( -75.97170)
The bench mark is a disk set in the top of the west end of a concrete curb on
top of a steel piling at the south end of the sea wall, 34 m (110 ft) east of
the east curb of Atlantic Avenue, 25 m (81 ft) west of the SE corner of the sea
wall and in line with the north curb of 7th Street, 0.3 m (1 ft) east of the
west end of the curb.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 5
Station ID: 8639208 PUBLICATION DATE: 08/03/2004
Name: VIRGINIA BEACH, RUDEE INLET
VA
NOAA Chart: 12207 Latitude: 36° 49.9' N ( 36.83170)
USGS Quad: VIRGINA BEACH Longitude: 75° 58.1' W ( -75.96830)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: NO 5 1960
DESIGNATION: 863 9208 TIDAL 5
MONUMENTATION: Tidal Station disk VM#: 3510
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#:
SETTING CLASSIFICATION: Concrete walkway OPUS PID:
LATITUDE: 36° 49.9' N ( 36.83170) LONGITUDE: 75° 58.1' W ( -75.96830)
The bench mark is a disk set in the top of a concrete walkway between the office
and east wing of Holiday Sands Motel, on the south side of the building, and
18.71 m (61.4 ft) east of the east edge of the curb of Atlantic Avenue.
BENCH MARK STAMPING: NO 6 1975
DESIGNATION: 863 9208 TIDAL 6
MONUMENTATION: Tidal Station disk VM#: 3511
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete bulkhead OPUS PID:
LATITUDE: 36° 49.9' N ( 36.83170) LONGITUDE: 75° 58.1' W ( -75.96830)
The bench mark is a disk set flush in a concrete bulkhead in the SE corner of
the concrete boardwalk at the bench, 12 m (40 ft) east of the SE corner of
Schooner Motor Inn, 2 m (8 ft) south of the second concrete rail support, 0.67 m
(2.2 ft) north of the south edge of the boardwalk, and 1 m (2 ft) west of the
east edge of the boardwalk.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 5
Station ID: 8639208 PUBLICATION DATE: 08/03/2004
Name: VIRGINIA BEACH, RUDEE INLET
VA
NOAA Chart: 12207 Latitude: 36° 49.9' N ( 36.83170)
USGS Quad: VIRGINA BEACH Longitude: 75° 58.1' W ( -75.96830)
T I D A L D A T U M S
Tidal datums at VIRGINIA BEACH, RUDEE INLET based on:
LENGTH OF SERIES: 2 MONTHS
TIME PERIOD: September 1975 - October 1975
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION: 8638610 SEWELLS POINT, HAMPTON ROADS
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
MEAN HIGHER HIGH WATER MHHW = 1.124
MEAN HIGH WATER MHW = 1.038
North American Vertical Datum NAVD88 = 0.757
MEAN SEA LEVEL MSL = 0.551
MEAN TIDE LEVEL MTL = 0.538
MEAN LOW WATER MLW = 0.037
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 4 1960 3.918 2.880
NO 1 1951 3.976 2.938
E 311 1952 4.029 2.991
NO 5 1960 4.950 3.912
NO 6 1975 3.802 2.764
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 5
Station ID: 8639208 PUBLICATION DATE: 08/03/2004
Name: VIRGINIA BEACH, RUDEE INLET
VA
NOAA Chart: 12207 Latitude: 36° 49.9' N ( 36.83170)
USGS Quad: VIRGINA BEACH Longitude: 75° 58.1' W ( -75.96830)
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.