U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 4
Station ID: 8746487 PUBLICATION DATE: 02/26/2004
Name: EASTERN WOLF RIVER
MS
NOAA Chart: 11371 Latitude: 30° 23.8' N ( 30.39670)
USGS Quad: GULFPORT NW Longitude: 89° 12.0' W ( -89.20000)
To reach the tidal bench marks from the intersection of Menge Avenue and U.S.
Highway 90 in Pass Christian, proceed north on Menge Avenue for 4.3 km (2.7 mi)
to a fork in the road, then bear right and proceed NE on Red Creek Road for 4.0
km (2.5 mi) to Tucker Road, then turn left and proceed NW on Tucker Road for 1.1
km (0.7 mi) to the Yarbrough residence, a split-level stone and wood house with
a pool. The bench marks are along Tucker Road and on the property. The tide
gage and staff were located on the Yarbroughs' dock on the Wolf River.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 6487 B 1978
DESIGNATION: 874 6487 B TIDAL
MONUMENTATION: Tidal Station disk VM#: 10390
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Driveway OPUS PID:
LATITUDE: 30° 23.8' N ( 30.39670) LONGITUDE: 89° 12.0' W ( -89.20000)
The bench mark is a disk set flush in the Yarbroughs concrete driveway, in front
of the Yarbrough residence, 25.54 m (83.8 ft) SSE of bench mark 6487 A 1978,
21.95 m (72.0 ft) SE of the SW corner of the house, 12.10 m (39.7 ft) east of
the west edge of the driveway, 10.76 m (35.3 ft) north of the curb of the
driveway, and 0.34 m (1.1 ft) west of the east edge of the driveway.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 4
Station ID: 8746487 PUBLICATION DATE: 02/26/2004
Name: EASTERN WOLF RIVER
MS
NOAA Chart: 11371 Latitude: 30° 23.8' N ( 30.39670)
USGS Quad: GULFPORT NW Longitude: 89° 12.0' W ( -89.20000)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 6487 D 1978
DESIGNATION: 874 6487 D TIDAL
MONUMENTATION: Tidal Station disk VM#: 10392
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Stainless steel rod OPUS PID:
LATITUDE: 30° 23.8' N ( 30.39670) LONGITUDE: 89° 12.0' W ( -89.20000)
The bench mark is a disk located 75 m (246 ft) east of bench mark 6487 C 1978, 7
m (24 ft) north of the centerline of the dirt road, 5 m (16 ft) ENE of the
centerline of a private dirt road, and 1.74 m (5.7 ft) north of power pole #15.
The bench mark is set 15 cm (0.5 ft) below ground level, crimped to the top of a
stainless steel rod driven 14.6 m (48 ft) to refusal, and encased in a 4-inch
PVC pipe and concrete kickblock.
BENCH MARK STAMPING: 6487 E 1978
DESIGNATION: 874 6487 E TIDAL
MONUMENTATION: Tidal Station disk VM#: 10393
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Stainless steel rod OPUS PID:
LATITUDE: 30° 23.8' N ( 30.39670) LONGITUDE: 89° 12.0' W ( -89.20000)
The bench mark is a disk located 71 m (234 ft) east of bench mark 6487 D 1978, 5
m (18 ft) north of the centerline of a dirt road, 0.76 m (2.5 ft) south of a
fenceline, and 0.58 m (1.9 ft) west of power pole #14. The bench mark is set
0.12 m (0.4 ft) below ground level, crimped to the top of a stainless steel rod
driven 11.0 m (36 ft) 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 4
Station ID: 8746487 PUBLICATION DATE: 02/26/2004
Name: EASTERN WOLF RIVER
MS
NOAA Chart: 11371 Latitude: 30° 23.8' N ( 30.39670)
USGS Quad: GULFPORT NW Longitude: 89° 12.0' W ( -89.20000)
T I D A L D A T U M S
Tidal datums at EASTERN WOLF RIVER based on:
LENGTH OF SERIES: 3 MONTHS
TIME PERIOD: November 1978 - January 1979
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION: 8747038 HENDERSON AVENUE BRIDGE, WOLF RIVER
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
MEAN HIGHER HIGH WATER MHHW = 0.458
MEAN HIGH WATER MHW = 0.447
MEAN SEA LEVEL MSL = 0.300
MEAN TIDE LEVEL MTL = 0.243
MEAN LOW WATER MLW = 0.040
MEAN LOWER LOW WATER MLLW = 0.000
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
6487 B 1978 2.409 1.962
6487 D 1978 7.645 7.198
6487 E 1978 7.369 6.922
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 4
Station ID: 8746487 PUBLICATION DATE: 02/26/2004
Name: EASTERN WOLF RIVER
MS
NOAA Chart: 11371 Latitude: 30° 23.8' N ( 30.39670)
USGS Quad: GULFPORT NW Longitude: 89° 12.0' W ( -89.20000)
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.