U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 5
Station ID: 8639207 PUBLICATION DATE: 08/11/2011
Name: INSIDE CHANNEL, RUDEE INLET
VA
NOAA Chart: 12207 Latitude: 36° 49.9' N ( 36.83170)
USGS Quad: VIRGINIA BEACH Longitude: 75° 58.4' W ( -75.97330)
To reach the tidal bench marks from the intersection of 22nd Street and Pacific,
follow Pacific south towards the Rudee Inlet bridge for 1.9 km (1.2 mi), and
just before the bridge turn right on Winston Salem Avenue. The Virginia Beach
Fishing Center is located on the left at 200 Winston Salem Avenue. The bench
marks are in the vicinity of the fishing center and extend to the south section
of the boardwalk. The tide gage and staff were located in the SE corner of the
Fishing Center.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 9207 C 1984
DESIGNATION: 863 9207 C
MONUMENTATION: Tidal Station disk VM#: 3505
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Bridge pier base OPUS PID:
LATITUDE: 36° 50.0' N ( 36.83330) LONGITUDE: 75° 58.3' W ( -75.97170)
The primary bench mark is a disk set in the northernmost pillar base underneath
the bridge, 2.01 m (6.6 ft) WSW of the pillar center, 1.71 m (5.6 ft) ENE of the
west pillar, 1.40 m (4.6 ft) south of the north pillar, and 1.31 m (4.3 ft)
north of the south pillar.
BENCH MARK STAMPING: E 311 1952
MONUMENTATION: Bench Mark disk VM#: 3501
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 the concrete curb on
top of a steel piling at the south end of a sea wall in line with the north
curbing of 7th Street, 34 m (110 ft) east of the east curbing of Atlantic
Avenue, 25 m (81 ft) west of the SE corner of the sea wall, and 0.3 m (1 ft)
east of the west end of the concrete curbing.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 5
Station ID: 8639207 PUBLICATION DATE: 08/11/2011
Name: INSIDE CHANNEL, RUDEE INLET
VA
NOAA Chart: 12207 Latitude: 36° 49.9' N ( 36.83170)
USGS Quad: VIRGINIA BEACH Longitude: 75° 58.4' W ( -75.97330)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 9207 B 1984
DESIGNATION: 863 9207 B
MONUMENTATION: Tidal Station disk VM#: 3506
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete monument OPUS PID:
LATITUDE: 36° 50.0' N ( 36.83330) LONGITUDE: 75° 58.4' W ( -75.97330)
The bench mark is a disk set in a concrete monument located near the NW corner
of the Virginia Beach Fishing Center, at the edge of a small grass hill on the
back side of the building, 9.75 m (32.0 ft) north of a wooden shed connected to
the main building, 4.82 m (15.8 ft) SE of power pole # O46, 4.57 m (15.0 ft)
east of the parking area, 2.0 m (6.6 ft) west of the NW corner of the building,
and 0.03 m (0.1 ft) below the ground.
BENCH MARK STAMPING: 9207 D 1995
DESIGNATION: 863 9207 D
MONUMENTATION: Tidal Station disk VM#: 17871
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete pad OPUS PID#: BBDC18
LATITUDE: 36° 50.2' N ( 36.83670) LONGITUDE: 75° 58.3' W ( -75.97170)
The bench mark is a disk set flush in a concrete base of a light pole #6,
located 9.39 m (30.8 ft) SW of the center of Winston Salem Avenue, 3.4 m (11.2
ft) NE of the NE corner of a concrete fuel pad, 0.18 m (0.6 ft) west of the east
edge of the concrete, and 0.91 m (3.0 ft) above the pavement.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 5
Station ID: 8639207 PUBLICATION DATE: 08/11/2011
Name: INSIDE CHANNEL, RUDEE INLET
VA
NOAA Chart: 12207 Latitude: 36° 49.9' N ( 36.83170)
USGS Quad: VIRGINIA BEACH Longitude: 75° 58.4' W ( -75.97330)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 9207 E 1995
DESIGNATION: 863 9207 E
MONUMENTATION: Tidal Station disk VM#: 17872
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete base 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 a round concrete base for a light #2,
located on the north side of the parking lot, 29.10 m (95.5 ft) east of Winston
Salem Avenue, 21.50 m (70.5 ft) west of power pole No.VP0008 with transformers,
1.60 m (5.2 ft) SW of a chain link fence, and 0.90 m (3.0 ft) above the
pavement.
BENCH MARK STAMPING: B/L STA
MONUMENTATION: Bench Mark disk VM#: 18002
AGENCY: US Corp of Engineers (COE) IDB PID#:
SETTING CLASSIFICATION: Boardwalk OPUS PID:
LATITUDE: 36° 49.8' N ( 36.83000) LONGITUDE: 75° 58.1' W ( -75.96830)
The bench mark is a disk set flush in the eastern jut of the Virginia Beach
boardwalk located at the most southern end, 8.69 m (28.5 ft) north of the
southern most edge of the boardwalk, 7.01 m (23.0 ft) ESE of the stairs leading
to the beach, and 1.71 m (5.6 ft) SW of the NE rounded corner of the boardwalk.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 5
Station ID: 8639207 PUBLICATION DATE: 08/11/2011
Name: INSIDE CHANNEL, RUDEE INLET
VA
NOAA Chart: 12207 Latitude: 36° 49.9' N ( 36.83170)
USGS Quad: VIRGINIA BEACH Longitude: 75° 58.4' W ( -75.97330)
T I D A L D A T U M S
Tidal datums at INSIDE CHANNEL, RUDEE INLET based on:
LENGTH OF SERIES: 2 YEARS
TIME PERIOD: December 2005 - November 2007
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION: 8651370 DUCK, FRF PIER
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
HIGHEST OBSERVED WATER LEVEL (11/22/2006) = 2.231
MEAN HIGHER HIGH WATER MHHW = 1.131
MEAN HIGH WATER MHW = 1.043
MEAN SEA LEVEL MSL = 0.547
MEAN TIDE LEVEL MTL = 0.542
MEAN LOW WATER MLW = 0.040
MEAN LOWER LOW WATER MLLW = 0.000
LOWEST OBSERVED WATER LEVEL (03/09/2008) = -0.643
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
9207 C 1984 1.668 0.625
E 311 1952 3.253 2.210
9207 B 1984 3.008 1.965
9207 D 1995 3.204 2.161
9207 E 1995 3.254 2.211
B/L STA 4.449 3.406
Foot Notes:
Bench marks B/L STA and E 311 1952 are based on one differential leveling
connection and do not meet the quality control standards of the NOS. Therefore,
caution should be used when deriving elevations for these marks.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 5
Station ID: 8639207 PUBLICATION DATE: 08/11/2011
Name: INSIDE CHANNEL, RUDEE INLET
VA
NOAA Chart: 12207 Latitude: 36° 49.9' N ( 36.83170)
USGS Quad: VIRGINIA BEACH Longitude: 75° 58.4' W ( -75.97330)
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.