Published Bench Mark Sheet for 8747131 MALLINI BAYOU NORTH MISSISSIPPI
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 5
PUBLICATION DATE: 03/30/1983
Station ID: 8747131 SUPERCEDED DATE: 04/21/2003
Name: MALLINI BAYOU NORTH
MISSISSIPPI
NOAA Chart: 11371 Latitude: 30° 19.6' N
USGS Quad: BAY ST. LOUIS Longitude: 89° 17.3' W
To reach the tidal bench marks from the intersection of Ponce De Leon Boulevard
and U.S. Highway 90 near the east end of the U.S. 90 bridge over St. Louis Bay,
proceed 0.8 mile (1.3 km) north on Ponce De Leon Boulevard to its intersection
with Magnolia Lane, then 0.1 mile (0.2 km) east on Magnolia Lane to house #308,
the McQueen residence. The tide gage and staff were located on the south side
of the McQueens private dock on the north bank of Mallini Bayou.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 7131 A 1978
MONUMENTATION: Survey Disk VM#: 10426
AGENCY: PID:
SETTING CLASSIFICATION: Stainless Steel Rod
The bench mark is in the backyard of the McQueen residence, 37.4 feet (11.4 m)
south of the SE corner of the house, 17.9 feet (5.5 m) north of a bulkhead on
Mallini Bayou, and 2.6 feet (0.8 m) west of the east property line of the
McQueen residence. The bench mark is 0.4 foot (0.1 m) below ground level,
crimped to a steel rod driven 60 feet (18 m) to refusal, and encased in a 4-inch
PVC pipe and concrete kickblock.
BENCH MARK STAMPING: 7131 B 1978
MONUMENTATION: Survey Disk VM#: 10427
AGENCY: PID:
SETTING CLASSIFICATION: Pavement
The bench mark is set flush near the east edge of the McQueens driveway, 109
feet (33 m) north of Bench Mark 7131A 1978, 44 feet (13 m) south of the
centerline of Magnolia Lane, 28.8 feet (8.8 m) SSW of power pole
#568,GP,VO,LR,FT,640, and 28.4 feet (8.7 m) north of the NE corner of the
McQueen residence.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 5
PUBLICATION DATE: 03/30/1983
Station ID: 8747131 SUPERCEDED DATE: 04/21/2003
Name: MALLINI BAYOU NORTH
MISSISSIPPI
NOAA Chart: 11371 Latitude: 30° 19.6' N
USGS Quad: BAY ST. LOUIS Longitude: 89° 17.3' W
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 7131 C 1978
MONUMENTATION: Survey Disk VM#: 10428
AGENCY: PID:
SETTING CLASSIFICATION: Stainless Steel Rod
The bench mark is 289 feet (88 m) west of Bench Mark 7131B 1978, 56.4 feet (17.2
m) NNE of the NE corner of the Fitzpatrick residence, 16 feet (4.9 m) south of
the centerline of Magnolia Lane, and 4.0 feet (1.2 m) east of power pole
#2,65,UO,LR,FT,440. The bench mark is 0.4 foot (0.1 m) below ground level,
crimped to a steel rod driven 48 feet (15 m) to refusal, and encased in a 4-inch
PVC pipe and concrete kickblock.
BENCH MARK STAMPING: 7131 D 1978
MONUMENTATION: Survey Disk VM#: 10429
AGENCY: PID:
SETTING CLASSIFICATION: Stainless Steel Rod
The bench mark is 214 feet (65 m) west of Bench Mark 7131C 1978, 103 feet (31 m)
ENE of the centerline intersection of Ponce De Leon Boulevard and Magnolia Lane,
15 feet (5 m) south of the centerline of Magnolia Lane, and 1.7 feet (0.5 m) NE
of power pole #V.P.C.O.,65,GP,VO,LR,FT,640. The bench mark is 0.4 foot (0.1 m)
below ground level, crimped to a steel rod driven 48 feet (15 m) to refusal, 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 3 of 5
PUBLICATION DATE: 03/30/1983
Station ID: 8747131 SUPERCEDED DATE: 04/21/2003
Name: MALLINI BAYOU NORTH
MISSISSIPPI
NOAA Chart: 11371 Latitude: 30° 19.6' N
USGS Quad: BAY ST. LOUIS Longitude: 89° 17.3' W
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 7131 E 1978
MONUMENTATION: Survey Disk VM#: 10430
AGENCY: PID:
SETTING CLASSIFICATION: Mat Foundation
The bench mark is set flush in the NE corner of a concrete foundation at the SW
corner of the intersection of Ponce De Leon Boulevard and Magnolia Lane (west),
278 feet (85 m) SW of Bench Mark 7131D 1978, 95 feet (29 m) SSW of the
centerline intersection of the two streets, 54 feet (16 m) south of the
centerline of Magnolia Lane, and 51.0 feet (15.5 m) SW of power pole
#54,GF,UO,LR,FT,640.
BENCH MARK STAMPING: 7145 D 1978
MONUMENTATION: Survey Disk VM#: 10431
AGENCY: PID:
SETTING CLASSIFICATION: Small Bridge
The bench mark is set flush on the west end of the concrete bridge over Mallini
Bayou on Bayview Street, 296 feet (90 m) WNW of Bench Mark 7145C 1978, 61.3 feet
(18.7 m) SE of the SE corner of Barretts Marine building, and 11.5 feet (3.5 m)
north of the centerline of Bayview Street.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 5
PUBLICATION DATE: 03/30/1983
Station ID: 8747131 SUPERCEDED DATE: 04/21/2003
Name: MALLINI BAYOU NORTH
MISSISSIPPI
NOAA Chart: 11371 Latitude: 30° 19.6' N
USGS Quad: BAY ST. LOUIS Longitude: 89° 17.3' W
T I D A L D A T U M S
Tidal datums at MALLINI BAYOU NORTH based on:
LENGTH OF SERIES: 3 MONTHS
TIME PERIOD: NOVEMBER 1978-JANUARY 1979
TIDAL EPOCH: 1960-1978
CONTROL TIDE STATION: 8747437 BAY WAVELAND YACHT CLUB, BAY ST. LOUIS
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in FEET:
HIGHEST OBSERVED WATER LEVEL (01/01/1979) = 2.83
MEAN HIGHER HIGH WATER (MHHW) = 1.78
MEAN HIGH WATER (MHW) = 1.64
MEAN TIDE LEVEL (MTL) = 0.91
MEAN LOW WATER (MLW) = 0.19
MEAN LOWER LOW WATER (MLLW) = 0.00
LOWEST OBSERVED WATER LEVEL (01/24/1979) = -2.06
National Geodetic Vertical Datum (NGVD 29)
Bench Mark Elevation Information In FEET above:
Stamping or Designation MLLW MHW
7131 A 1978 5.72 4.08
7131 B 1978 7.46 5.82
7131 C 1978 5.05 3.41
7131 D 1978 4.69 3.05
7131 E 1978 6.09 4.45
7145 D 1978 9.23 7.59
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 5
PUBLICATION DATE: 03/30/1983
Station ID: 8747131 SUPERCEDED DATE: 04/21/2003
Name: MALLINI BAYOU NORTH
MISSISSIPPI
NOAA Chart: 11371 Latitude: 30° 19.6' N
USGS Quad: BAY ST. LOUIS Longitude: 89° 17.3' 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.
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