U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 6
PUBLICATION DATE: 12/22/1987
Station ID: 8746819 SUPERCEDED DATE: 04/21/2003
Name: PASS CHRISTIAN YACHT CLUB,MISSISSIPPI SOUND
MISSISSIPPI
NOAA Chart: 11372 Latitude: 30° 18.6' N
USGS Quad: PASSCHRISTIAN Longitude: 89° 14.7' W
To reach the tidal bench marks from the intersection of U.S. Highway 90 and
Market Street in Pass Christian, proceed 0.1 mile (0.2 km) south on Market
Street to the Pass Christian Yacht Club. The bench marks are located north of
the yacht club along Market Street. The tide gage and staff were located on the
north side of the eastern half of the T-shaped yacht club pier.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 6819 A 1979
MONUMENTATION: Survey Disk VM#: 10409
AGENCY: PID:
SETTING CLASSIFICATION: Stainless Steel Rod
The bench mark is on the east side of Market Street, 226 feet (69 m) north of
Bench Mark 6819 C 1979, 72.1 feet (22.0 m) ENE of the yacht basin bulkhead, 53.3
feet (16.2 m) ENE of the SE corner of a concrete block fish house, and 32.0 feet
(9.8 m) ENE of the centerline of Market Street. The bench mark is 0.3 foot (0.1
m) below ground level, crimped to a stainless steel rod driven 50 feet (15 m) to
substantial resistance, and encased in a 4-inch PVC pipe and concrete kickblock.
BENCH MARK STAMPING: V 190 1955
MONUMENTATION: Survey Disk VM#: 10407
AGENCY: PID#: BH0917
SETTING CLASSIFICATION: Concrete Monument
The bench mark is set flush in a concrete monument, 0.85 mile (1.37 km) west
along the Louisville & Nashville Railroad from the crossing of Davis Avenue in
Pass Christian, 0.25 mile (0.40 km) east of milepost #750, 245 feet (75 m) SE of
the center of the crossing of Henderson Avenue, 50.6 feet (15.4 m) east of the
NW corner of a cemetery, 47 feet (14 m) south of the south rail, 34.0 feet (10.4
m) east of the NE corner of a 16x8-foot (5x2 m) brick building, 0.7 foot (0.2 m)
south of a witness post, 0.5 foot (0.2 m) south of a fence, and 0.1 foot (0.1 m)
below ground level.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 6
PUBLICATION DATE: 12/22/1987
Station ID: 8746819 SUPERCEDED DATE: 04/21/2003
Name: PASS CHRISTIAN YACHT CLUB,MISSISSIPPI SOUND
MISSISSIPPI
NOAA Chart: 11372 Latitude: 30° 18.6' N
USGS Quad: PASSCHRISTIAN Longitude: 89° 14.7' W
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: Y 214 1963
MONUMENTATION: Survey Disk VM#: 10408
AGENCY: PID#: BH0916
SETTING CLASSIFICATION: Copper-clad Steel Rod
The bench mark is along the Louisville & Nashville Railroad in Pass Christian,
333 feet (101 m) SW of the south corner of the abandoned railroad station, 256
feet (78 m) SE of the center of the crossing of Davis Avenue and the main track,
245 feet (75 m) SE of the SE rail of the main track, 68 feet (21 m) NE of the
centerline of Davis Avenue, 30.5 feet (9.3 m) NW of the centerline of 3rd Street
in line with a row of oak trees, and 1.5 feet (0.5 m) NW of a metal witness
post. The bench mark is at ground level, crimped to a stainless steel rod
driven 84.5 feet (25.8 m) to refusal, and encased in a 4-inch steel pipe.
BENCH MARK STAMPING: 6819 B 1979
MONUMENTATION: Survey Disk VM#: 10410
AGENCY: PID:
SETTING CLASSIFICATION: Concrete Seawall
The bench mark is set in the top of a concrete seawall at the SE corner of the
yacht club basin, 335 feet (102 m) SW of the SW corner of the yacht club
building, 20.4 feet (6.2 m) west of the east end of the seawall, and 1.6 feet
(0.5 m) NW of the south edge of the seawall.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 6
PUBLICATION DATE: 12/22/1987
Station ID: 8746819 SUPERCEDED DATE: 04/21/2003
Name: PASS CHRISTIAN YACHT CLUB,MISSISSIPPI SOUND
MISSISSIPPI
NOAA Chart: 11372 Latitude: 30° 18.6' N
USGS Quad: PASSCHRISTIAN Longitude: 89° 14.7' W
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 6819 C 1979
MONUMENTATION: Survey Disk VM#: 10411
AGENCY: PID:
SETTING CLASSIFICATION: Mat Foundation
The bench mark is set flush in the SE corner of a concrete boat hoist pad in the
SE corner of the yacht club basin, 114.1 feet (34.8 m) SW of utility pole #5, 85
feet (26 m) SW of the centerline of Market Street, and 8.9 feet (2.7 m) NE of
the yacht basin bulkhead.
BENCH MARK STAMPING: 6819 D 1979
MONUMENTATION: Survey Disk VM#: 10412
AGENCY: PID:
SETTING CLASSIFICATION: Stainless Steel Rod
The bench mark is on the east side of Market Street, 263 feet (80 m) NNW of
Bench Mark 6819 A 1979, 37.8 feet (11.5 m) ENE of the yacht basin bulkhead, 20.5
feet (6.2 m) north of a fire hydrant, 17.0 feet (5.2 m) ENE of the centerline of
Market Street, and 1.2 feet (0.4 m) WSW of utility pole #3. The bench mark is
0.3 foot (0.1 m) below ground level, crimped to a stainless steel rod driven 45
feet (14 m) to substantial resistance, and encased in a 4-inch PVC pipe and
concrete kickblock.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 6
PUBLICATION DATE: 12/22/1987
Station ID: 8746819 SUPERCEDED DATE: 04/21/2003
Name: PASS CHRISTIAN YACHT CLUB,MISSISSIPPI SOUND
MISSISSIPPI
NOAA Chart: 11372 Latitude: 30° 18.6' N
USGS Quad: PASSCHRISTIAN Longitude: 89° 14.7' W
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 6819 E 1979
MONUMENTATION: Survey Disk VM#: 10413
AGENCY: PID:
SETTING CLASSIFICATION: Stainless Steel Rod
The bench mark is on the east side of Market Street, 230 feet (70 m) NNW of
Bench Mark 6819 D 1979, 34.3 feet (10.5 m) ENE the yacht basin bulkhead, 15 feet
(5 m) ENE of the centerline of Market Street, and 2.0 feet (0.6 m) south of
utility pole #2. The bench mark is 0.4 foot (0.1 m) below ground level, crimped
to a stainless steel rod driven 45 feet (14 m) to substantial resistance, and
encased in a 4-inch PVC pipe and concrete kickblock.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 6
PUBLICATION DATE: 12/22/1987
Station ID: 8746819 SUPERCEDED DATE: 04/21/2003
Name: PASS CHRISTIAN YACHT CLUB,MISSISSIPPI SOUND
MISSISSIPPI
NOAA Chart: 11372 Latitude: 30° 18.6' N
USGS Quad: PASSCHRISTIAN Longitude: 89° 14.7' W
T I D A L D A T U M S
Tidal datums at PASS CHRISTIAN YACHT CLUB,MISSISSIPPI SOUND based on:
LENGTH OF SERIES: 12 MONTHS
TIME PERIOD: DECEMBER1979-NOVEMBER 1980
TIDAL EPOCH: 1960-1978
CONTROL TIDE STATION: 8747437 BAY WAVELAND, MS
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in FEET:
HIGHEST OBSERVED WATER LEVEL (07/11/1979) = 6.05
MEAN HIGHER HIGH WATER MHHW = 1.77
MEAN HIGH WATER MHW = 1.66
MEAN TIDE LEVEL MTL = 0.89
* NATIONAL GEODETIC VERTICAL DATUM NGVD29 = 0.69
MEAN LOW WATER MLW = 0.12
MEAN LOWER LOW WATER MLLW = 0.00
LOWEST OBSERVED WATER LEVEL (03/02/1980) = -2.55
* NGVD reference based on elevations published in Quad 300892, 1984, and NOS
leveling of 1980.
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In FEET above:
Stamping or Designation MLLW MHW
6819 A 1979 5.14 3.48
V 190 1955 14.36 12.70
Y 214 1963 9.83 8.17
6819 B 1979 10.88 9.22
6819 C 1979 4.61 2.95
6819 D 1979 6.65 4.99
6819 E 1979 8.41 6.75
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 6
PUBLICATION DATE: 12/22/1987
Station ID: 8746819 SUPERCEDED DATE: 04/21/2003
Name: PASS CHRISTIAN YACHT CLUB,MISSISSIPPI SOUND
MISSISSIPPI
NOAA Chart: 11372 Latitude: 30° 18.6' N
USGS Quad: PASSCHRISTIAN Longitude: 89° 14.7' 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 (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 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.