U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 7
Station ID: 8746819 PUBLICATION DATE: 02/05/2004
Name: PASS CHRISTIAN YACHT CLUB, MISS. SOUND
MS
NOAA Chart: 11372 Latitude: 30° 18.6' N ( 30.31000)
USGS Quad: PASS CHRISTIAN Longitude: 89° 14.7' W ( -89.24500)
To reach the tidal bench marks from the intersection of U.S. Highway 90 and
Market Street in Pass Christian, proceed 0.2 km (0.1 mi) 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
DESIGNATION: 874 6819 A
MONUMENTATION: Tidal Station disk VM#: 10409
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Stainless steel rod OPUS PID:
LATITUDE: 30° 18.6' N ( 30.31000) LONGITUDE: 89° 14.7' W ( -89.24500)
The primary bench mark is a disk located on the east side of Market Street, 69 m
(226 ft) north of Bench Mark 6819 C 1979, 22 m (72 ft) ENE of the yacht basin
bulkhead, 16.25 m (53.3 ft) ENE of the SE corner of a concrete block fish house,
and 9.75 m (32.0 ft) ENE of the centerline of Market Street. The bench mark is
0.09 m (0.3 ft) below ground level, crimped to the top of a stainless steel rod
driven 15.2 m (50 ft) 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 2 of 7
Station ID: 8746819 PUBLICATION DATE: 02/05/2004
Name: PASS CHRISTIAN YACHT CLUB, MISS. SOUND
MS
NOAA Chart: 11372 Latitude: 30° 18.6' N ( 30.31000)
USGS Quad: PASS CHRISTIAN Longitude: 89° 14.7' W ( -89.24500)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: V 190 1955
DESIGNATION: V 190
MONUMENTATION: Bench Mark disk VM#: 10407
AGENCY: US Coast & Geodetic Survey
(USC&GS) IDB PID#: BH0917
SETTING CLASSIFICATION: Concrete monument OPUS PID:
LATITUDE: 30° 18.9' N ( 30.31500) LONGITUDE: 89° 15.4' W ( -89.25670)
The bench mark is a disk set flush in a concrete monument, 1.37 km (0.85 mi)
west along the Louisville & Nashville Railroad from the crossing of Davis Avenue
in Pass Christian, 0.40 km (0.25 mi) east of milepost #750, 75 m (245 ft) SE of
the center of the crossing of Henderson Avenue, 15.42 m (50.6 ft) east of the NW
corner of a cemetery, 14 m (47 ft) south of the south rail, 10.36 m (34.0 ft)
east of the NE corner of a 5 m x 2 m (16 ft x 8 ft) brick building, 0.21 m (0.7
ft) south of a witness post, 0.15 m (0.5 ft) south of a fence, and 0.03 m (0.1
ft) below ground level.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 7
Station ID: 8746819 PUBLICATION DATE: 02/05/2004
Name: PASS CHRISTIAN YACHT CLUB, MISS. SOUND
MS
NOAA Chart: 11372 Latitude: 30° 18.6' N ( 30.31000)
USGS Quad: PASS CHRISTIAN Longitude: 89° 14.7' W ( -89.24500)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: Y 214 1963
DESIGNATION: Y 214
MONUMENTATION: Bench Mark disk VM#: 10408
AGENCY: US Coast & Geodetic Survey
(USC&GS) IDB PID#: BH0916
SETTING CLASSIFICATION: Copper-clad steel rod OPUS PID:
LATITUDE: 30° 19.2' N ( 30.32000) LONGITUDE: 89° 14.6' W ( -89.24330)
The bench mark is a disk located along the Louisville & Nashville Railroad in
Pass Christian, 101 m (333 ft) SW of the south corner of the abandoned railroad
station, 78 m (256 ft) SE of the center of the crossing of Davis Avenue and the
main track, 75 m (245 ft) SE of the SE rail of the main track, 21 m (68 ft) NE
of the centerline of Davis Avenue, 9.30 m (30.5 ft) NW of the centerline of 3rd
Street in line with a row of oak trees, and 0.46 m (1.5 ft) NW of a metal
witness post. The bench mark is at ground level, crimped to the top of a
stainless steel rod driven 25.8 m (84 ft) to refusal, and encased in a 4-inch
steel pipe.
BENCH MARK STAMPING: 6819 B 1979
DESIGNATION: 874 6819 B
MONUMENTATION: Tidal Station disk VM#: 10410
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete sea wall OPUS PID:
LATITUDE: 30° 18.6' N ( 30.31000) LONGITUDE: 89° 14.7' W ( -89.24500)
The bench mark is a disk set in the top of a concrete sea wall at the SE corner
of the yacht club basin, 102 m (335 ft) SW of the SW corner of the yacht club
building, 6.22 m (20.4 ft) west of the east end of the sea wall, and 0.49 m (1.6
ft) NW of the south edge of the sea wall.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 7
Station ID: 8746819 PUBLICATION DATE: 02/05/2004
Name: PASS CHRISTIAN YACHT CLUB, MISS. SOUND
MS
NOAA Chart: 11372 Latitude: 30° 18.6' N ( 30.31000)
USGS Quad: PASS CHRISTIAN Longitude: 89° 14.7' W ( -89.24500)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 6819 C 1979
DESIGNATION: 874 6819 C
MONUMENTATION: Tidal Station disk VM#: 10411
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete boat hoist pad OPUS PID:
LATITUDE: 30° 18.6' N ( 30.31000) LONGITUDE: 89° 14.7' W ( -89.24500)
The bench mark is a disk set flush in the SE corner of a concrete boat hoist pad
in the SE corner of the yacht club basin, 34.78 m (114.1 ft) SW of utility pole
#5, 26 m (85 ft) SW of the centerline of Market Street, and 2.71 m (8.9 ft) NE
of the yacht basin bulkhead.
BENCH MARK STAMPING: 6819 D 1979
DESIGNATION: 874 6819 D
MONUMENTATION: Tidal Station disk VM#: 10412
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Stainless steel rod OPUS PID:
LATITUDE: 30° 18.6' N ( 30.31000) LONGITUDE: 89° 14.7' W ( -89.24500)
The bench mark is a disk located on the east side of Market Street, 80 m (263
ft) NNW of Bench Mark 6819 A 1979, 11.52 m (37.8 ft) ENE of the yacht basin
bulkhead, 6.25 m (20.5 ft) north of a fire hydrant, 5.18 m (17.0 ft) ENE of the
centerline of Market Street, and 0.37 m (1.2 ft) WSW of utility pole #3. The
bench mark is 0.09 m (0.3 ft) below ground level, crimped to the top of a
stainless steel rod driven 13.7 m (45 ft) 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 7
Station ID: 8746819 PUBLICATION DATE: 02/05/2004
Name: PASS CHRISTIAN YACHT CLUB, MISS. SOUND
MS
NOAA Chart: 11372 Latitude: 30° 18.6' N ( 30.31000)
USGS Quad: PASS CHRISTIAN Longitude: 89° 14.7' W ( -89.24500)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 6819 E 1979
DESIGNATION: 874 6819 E
MONUMENTATION: Tidal Station disk VM#: 10413
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Stainless steel rod OPUS PID:
LATITUDE: 30° 18.6' N ( 30.31000) LONGITUDE: 89° 14.7' W ( -89.24500)
The bench mark is a disk located on the east side of Market Street, 70 m (230
ft) NNW of Bench Mark 6819 D 1979, 10.45 m (34.3 ft) ENE the yacht basin
bulkhead, 5 m (15 ft) ENE of the centerline of Market Street, and 0.61 m (2.0
ft) south of utility pole #2. The bench mark is 0.12 m (0.4 ft) below ground
level, crimped to the top of a stainless steel rod driven 13.7 m (45 ft) 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 6 of 7
Station ID: 8746819 PUBLICATION DATE: 02/05/2004
Name: PASS CHRISTIAN YACHT CLUB, MISS. SOUND
MS
NOAA Chart: 11372 Latitude: 30° 18.6' N ( 30.31000)
USGS Quad: PASS CHRISTIAN Longitude: 89° 14.7' W ( -89.24500)
T I D A L D A T U M S
Tidal datums at PASS CHRISTIAN YACHT CLUB, MISS. SOUND based on:
LENGTH OF SERIES: 1 YEAR
TIME PERIOD: December 1979 - November 1980
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION: 8747437 BAY WAVELAND YC, BAY ST. LOUIS
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
HIGHEST OBSERVED WATER LEVEL (07/11/1979) = 1.787
MEAN HIGHER HIGH WATER MHHW = 0.526
MEAN HIGH WATER MHW = 0.499
MEAN SEA LEVEL MSL = 0.267
MEAN TIDE LEVEL MTL = 0.266
North American Vertical Datum NAVD88 = 0.113
MEAN LOW WATER MLW = 0.033
MEAN LOWER LOW WATER MLLW = 0.000
LOWEST OBSERVED WATER LEVEL (03/02/1980) = -0.834
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
6819 A 1979 1.510 1.011
V 190 1955 4.319 3.820
Y 214 1963 2.939 2.440
6819 B 1979 3.259 2.760
6819 C 1979 1.348 0.849
6819 D 1979 1.971 1.472
6819 E 1979 2.506 2.007
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 7 of 7
Station ID: 8746819 PUBLICATION DATE: 02/05/2004
Name: PASS CHRISTIAN YACHT CLUB, MISS. SOUND
MS
NOAA Chart: 11372 Latitude: 30° 18.6' N ( 30.31000)
USGS Quad: PASS CHRISTIAN Longitude: 89° 14.7' W ( -89.24500)
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.