U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 5
Station ID: 8743281 PUBLICATION DATE: 02/09/2009
Name: OCEAN SPRINGS
MS
NOAA Chart: 11372 Latitude: 30° 23.5' N ( 30.39170)
USGS Quad: OCEAN SPRINGS Longitude: 88° 47.9' W ( -88.79830)
To reach the tidal bench marks from I-10 east, take exit 50 (Ocean Springs) and
proceed south on Washington Avenue (State Route 609) for 5.1 km (3.2 mi) to
Calhoun Street, then turn left and proceed east on Calhoun Street for 0.5 km
(0.3 mi) Pershing Avenue, turn right on Pershing Avenue and proceed south 0.3 km
(0.2 mi) to Shearwater Drive, continue east on Shearwater Drive for 1.6 km (1.0
mi) to East Beach Drive, continue east on East Beach Drive for 1.1 km (0.7 mi)
to the University of Southern Mississippi Gulf Coast Research Laboratory (GCRL)
entrance on the left. The bench marks are on the Laboratory property, and the
tide station was located on a three pile structure next to the Lab's wooden
pier.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 3281 A 2005
DESIGNATION: 874 3281 A
MONUMENTATION: Flange-encased Rod VM#: 17818
AGENCY: National Ocean Service (NOAA) IDB PID#:
SETTING CLASSIFICATION: OPUS PID:
LATITUDE: 30° 23.5' N ( 30.39170) LONGITUDE: 88° 48.0' W ( -88.80000)
In Ocean Springs, on the south side of the University of Southern Mississippi
Gulf Coast Research Laboratory property on East Beach Road, the primary bench
mark is a flange encased rod located near the Lab's wooden pier, 26.81 m (88.0
ft) WSW of the north end of the wooden pier, 26.34 m (86.4 ft) east of light
pole number 345, and 7.50 m (24.6 ft) south of a wooden sign for the Research
Laboratory. The datum point is set 3 cm (0.1 ft) below grade, being the top of a
stainless steel rod driven 15.8 m (52 ft) to refusal, in a sleeve extending to a
depth of 1.0 m (3 ft), and encased in a 5 inch NOS logo cap. This bench mark
does not meet the requirements of a Class A rod mark.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 5
Station ID: 8743281 PUBLICATION DATE: 02/09/2009
Name: OCEAN SPRINGS
MS
NOAA Chart: 11372 Latitude: 30° 23.5' N ( 30.39170)
USGS Quad: OCEAN SPRINGS Longitude: 88° 47.9' W ( -88.79830)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 3281 B 2005
DESIGNATION: 874 3281 B
MONUMENTATION: Flange-encased Rod VM#: 17819
AGENCY: National Ocean Service (NOAA) IDB PID#:
SETTING CLASSIFICATION: OPUS PID:
LATITUDE: 30° 23.5' N ( 30.39170) LONGITUDE: 88° 48.0' W ( -88.80000)
In Ocean Springs, at the SW corner of the University of Southern Mississippi
Gulf Coast Research Laboratory property on East Beach Road, the bench mark is a
flange encased rod located near the exit gates and a road leading north to
facility housing, 24.50 m (80.4 ft) SSW of the center of a large live oak tree,
13.92 m (45.7 ft) north of the centerline of the entrance road by the gates,
11.15 m (36.6 ft) west of light pole number spsk60, and 10.46 m (34.3 ft) east
of a road leading to the facility housing. The datum point is at grade, being
the top of a stainless steel rod driven 15.85 m (52.0 ft) to refusal, and
encased in a 5 inch PVC pipe and NOS logo cap. This bench mark does not meet the
requirements of a Class A rod mark.
BENCH MARK STAMPING: OSV-2 1970
DESIGNATION: 874 3281 OSV-2
MONUMENTATION: Survey disk VM#: 17834
AGENCY: US Army Corps of Engineers (USE) IDB PID#:
SETTING CLASSIFICATION: Concrete Wall OPUS PID:
LATITUDE: 30° 23.5' N ( 30.39170) LONGITUDE: 88° 47.9' W ( -88.79830)
In Ocean Springs, at the south end of Halstead Road and Ocean Springs Drive near
the entrance road to the University of Southern Mississippi Gulf Coast Research
Laboratory, the bench mark is a brass disk set in top of a concrete wall that
runs east - west along the beach, 30.55 m (100.2 ft) SE of a yellow fire
hydrant, 21.83 m (71.6 ft) south of the centerline of the paved road that leads
into the GCRL property, and 1.97 m (6.5 ft) south of the north end of the wall.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 5
Station ID: 8743281 PUBLICATION DATE: 02/09/2009
Name: OCEAN SPRINGS
MS
NOAA Chart: 11372 Latitude: 30° 23.5' N ( 30.39170)
USGS Quad: OCEAN SPRINGS Longitude: 88° 47.9' W ( -88.79830)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: MS-17A 3275 E 1980
DESIGNATION: 874 3281 E
MONUMENTATION: Tidal Station disk VM#: 17835
AGENCY: National Ocean Service (NOAA) IDB PID#:
SETTING CLASSIFICATION: Concrete Wall OPUS PID:
LATITUDE: 30° 23.5' N ( 30.39170) LONGITUDE: 88° 47.9' W ( -88.79830)
In Ocean Springs, on East Beach Drive near the east end of the drive, the bench
mark is a disk set in top of a concrete wall that runs east - west along East
Beach Drive, about 61.0 m (200 ft) west of BM OSV-2, 31.64 m (103.8 ft) SW of
power pole number 51, 25.90 m (85.0 ft) ESE of power pole number 50, and 0.45 m
(1.5 ft) above ground.
BENCH MARK STAMPING: OSV-3 MS-17 GPS 1994
DESIGNATION: 874 3281 OSV-3
MONUMENTATION: Survey disk VM#: 17836
AGENCY: US Army Corps of Engineers (USE) IDB PID#:
SETTING CLASSIFICATION: Concrete Wall OPUS PID:
LATITUDE: 30° 23.5' N ( 30.39170) LONGITUDE: 88° 47.9' W ( -88.79830)
In Ocean Springs, across the street from the two story house at 611 East Beach
Drive that is located approximately 0.8 km (0.5 mi) west of the east end of the
Drive, the bench mark is a disk set in top of a concrete wall that runs east -
west along the beach, 21.83 m (71.6 ft) SSW of power pole number 47, 21.70 m
(71.2 ft) SSE of power pole number 46, 12.52 m (41.1 ft) south of a yellow fire
hydrant, and 0.45 m (1.5 ft) above ground.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 5
Station ID: 8743281 PUBLICATION DATE: 02/09/2009
Name: OCEAN SPRINGS
MS
NOAA Chart: 11372 Latitude: 30° 23.5' N ( 30.39170)
USGS Quad: OCEAN SPRINGS Longitude: 88° 47.9' W ( -88.79830)
T I D A L D A T U M S
Tidal datums at OCEAN SPRINGS based on:
LENGTH OF SERIES: 2 MONTHS
TIME PERIOD: June 2005 - July 2005
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION: 8744117 BILOXI, BAY OF BILOXI
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
MEAN HIGHER HIGH WATER MHHW = 0.526
MEAN HIGH WATER MHW = 0.501
MEAN TIDE LEVEL MTL = 0.273
MEAN SEA LEVEL MSL = 0.264
MEAN LOW WATER MLW = 0.044
MEAN LOWER LOW WATER MLLW = 0.000
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
3281 A 2005 0.800 0.299
3281 B 2005 1.334 0.833
OSV-2 1970 2.258 1.757
MS-17A 3275 E 1980 2.251 1.750
OSV-3 MS-17 GPS 1994 2.228 1.727
Foot Notes:
All benchmarks for station 8743281 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 this station.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 5
Station ID: 8743281 PUBLICATION DATE: 02/09/2009
Name: OCEAN SPRINGS
MS
NOAA Chart: 11372 Latitude: 30° 23.5' N ( 30.39170)
USGS Quad: OCEAN SPRINGS Longitude: 88° 47.9' W ( -88.79830)
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.