U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 5
Station ID: 8744117 PUBLICATION DATE: 08/09/2005
Name: BILOXI, BAY OF BILOXI
MISSISSIPPI
NOAA Chart: 11372 Latitude: 30° 24.7' N
USGS Quad: BILOXI Longitude: 88° 54.2' W
To reach the bench marks from Highway 110, travel into Biloxi and take the
Bayview Avenue exit, which is the first exit after the bridge. Turn south on
Bayview Avenue and proceed 2.1 km (1.3 mi) to the Forrest Avenue pier. The
bench marks are located down Bayview Avenue toward the bridge and the water.
The tide station is located on the pier.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 4117 E 2004
DESIGNATION: 874 4117 E
MONUMENTATION: Flange-encased Rod VM#: 17644
AGENCY: National Ocean Service (NOS) PID:
SETTING CLASSIFICATION: Stainless steel rod in sleeve
The primary bench mark is located on the north side of Bayview Ave in a grassy
area, 39.68 m (130.2 ft) east of a light pole number 6-99 / 3-40, 39.50 m (129.6
ft) west of the center line of Bayshore Drive, 19.70 m (64.6 ft) west of the
southernly most live oak tree, 13.08 m (42.9 ft) north of the north curb of
Bayview Ave, and 8.11 m (26.6 ft) south of a light pole number 12-99 / 3-40 with
NOAA witness post. The mark being the top of a stainless steel rod, driven to
24.1 m (79 ft) to refusal and encased with a concrete kickblock.
BENCH MARK STAMPING: 4117 A 2004
DESIGNATION: 974 4117 A
MONUMENTATION: Flange-encased Rod VM#: 17640
AGENCY: National Ocean Service (NOS) PID:
SETTING CLASSIFICATION: Stainless steel rod in sleeve
The bench mark is located south of the SE corner of Forest Ave Pier parking lot
across from the Forrest Ave pier, 33.50 m (109.9 ft) west of the west curb of
Forrest Ave, 28.68 m (94.1 ft) south of the south curb of Bayview Ave, 28.4 m
(93.2 ft) east of the NW corner of a black metal fence, 2.59 m (8.5 ft) north of
a black metal fence, and 1.0 m (3.3 ft) north of a NOAA witness post. The mark
being the top of a stainless steel rod, driven to 7.9 m (26 ft) to refusal and
encased with a concrete kickblock.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 5
Station ID: 8744117 PUBLICATION DATE: 08/09/2005
Name: BILOXI, BAY OF BILOXI
MISSISSIPPI
NOAA Chart: 11372 Latitude: 30° 24.7' N
USGS Quad: BILOXI Longitude: 88° 54.2' W
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 4117 B 2004
DESIGNATION: 874 4117 B
MONUMENTATION: Tidal Station disk VM#: 17641
AGENCY: National Ocean Service (NOS) PID:
SETTING CLASSIFICATION: Concrete seawall
The benchmark is a disk set in a concrete seawall, across the street from
residence at 1091 Bayview Ave, 42.49 m (139.4 ft) east of the west end of the
seawall, 9.0 m (29.5 ft) west of the center line of a wooden pier, 2.86 m (9.4
ft) west of the west curb of Bayview Ave, and 0.24 m (0.8 ft) above the road.
BENCH MARK STAMPING: 4117 C 2004
DESIGNATION: 874 4117 C
MONUMENTATION: Tidal Station disk VM#: 17642
AGENCY: National Ocean Service (NOS) PID:
SETTING CLASSIFICATION: Concrete seawall
The benchmark is a disk set in a concrete seawall, near the intersection of
Bayview Ave and Porter Ave on the north side of Bayview Ave, 22.80 m (74.8 ft)
east of a yellow fire hydrant number 4 across from residence at 1067 Bayview
Ave, 2.75 m (9.0 ft) east of the east curb of Bayview, 1.31 m (4.3 ft) south of
the centerline of the Porter Ave pier, 0.30 m (1.0 ft) above the road.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 5
Station ID: 8744117 PUBLICATION DATE: 08/09/2005
Name: BILOXI, BAY OF BILOXI
MISSISSIPPI
NOAA Chart: 11372 Latitude: 30° 24.7' N
USGS Quad: BILOXI Longitude: 88° 54.2' W
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 4117 D 2004
DESIGNATION: 874 4117 D
MONUMENTATION: Tidal Station disk VM#: 17643
AGENCY: National Ocean Service (NOS) PID:
SETTING CLASSIFICATION: Concrete seawall
The benchmark is a disk set in a concrete seawall, across from residence at 1049
Bayview Ave on the north side of Bayview Ave, 56.11 m (184.1 ft) west of a light
pole with electric box and transformer, 3.38 m (11.1 ft) east of a private dock,
2.71 m (8.9 ft) north of the north curb of Bayview Ave, and 0.30 m (1.0 ft)
above the road.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 5
Station ID: 8744117 PUBLICATION DATE: 08/09/2005
Name: BILOXI, BAY OF BILOXI
MISSISSIPPI
NOAA Chart: 11372 Latitude: 30° 24.7' N
USGS Quad: BILOXI Longitude: 88° 54.2' W
T I D A L D A T U M S
Tidal datums at BILOXI, BAY OF BILOXI based on:
LENGTH OF SERIES: 5 MONTHS
TIME PERIOD: August 2004 - December 2004
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION: 8747766 WAVELAND, MISSISSIPPI SOUND
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
MEAN HIGHER HIGH WATER (MHHW) = 0.542
MEAN HIGH WATER (MHW) = 0.516
MEAN TIDE LEVEL (MTL) = 0.280
MEAN SEA LEVEL (MSL) = 0.276
MEAN LOW WATER (MLW) = 0.045
MEAN LOWER LOW WATER (MLLW) = 0.000
National Geodetic Vertical Datum (NGVD 29)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
4117 E 2004 2.184 1.668
4117 A 2004 2.927 2.411
4117 B 2004 2.344 1.828
4117 C 2004 2.356 1.840
4117 D 2004 1.894 1.378
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 5
Station ID: 8744117 PUBLICATION DATE: 08/09/2005
Name: BILOXI, BAY OF BILOXI
MISSISSIPPI
NOAA Chart: 11372 Latitude: 30° 24.7' N
USGS Quad: BILOXI Longitude: 88° 54.2' 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.