Published Bench Mark Sheet for 8668836 STATION CREEK, WEST END SOUTH CAROLINA
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 6
PUBLICATION DATE: 10/28/1986
Station ID: 8668836 SUPERCEDED DATE: 04/21/2003
Name: STATION CREEK, WEST END
SOUTH CAROLINA
NOAA Chart: 11516 Latitude: 32° 16.8' N
USGS Quad: PARRIS ISLAND Longitude: 80° 38.3' W
To reach the tidal bench marks by boat from the public boat landing at the
Beaufort Downtown Marina, proceed south on Beaufort River for approximately 9
miles (14 km) to the junction of Station Creek. The bench marks are on both the
northern and southern shores of Station Creek just inside the creek entrance.
The tide gage and staff were located on an offshore platform near the creek
entrance.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 8836 A 1980
MONUMENTATION: Survey Disk VM#: 4525
AGENCY: PID:
SETTING CLASSIFICATION: Stainless Steel Rod
The bench mark is on the southern shore, 207.0 feet (63.1 m) SE of a S.C.
channel marker sign at the entrance to Station Creek, 130.0 feet (39.6 m) NE of
Bench Mark 8836 F 1982, 7.0 feet (2.1 m) NE of a 1.7-foot (0.5 m) diameter
piling, and 5.1 feet (1.6 m) NNW of a metal witness post. The bench mark is
crimped to a stainless steel rod driven 35 feet (11 m) to refusal, encased in a
4-inch PVC pipe and concrete kickblock, and 0.4 foot (0.1 m) above ground level.
BENCH MARK STAMPING: ISLAND 1933
MONUMENTATION: Survey Disk VM#: 4523
AGENCY: PID#: CK5458
SETTING CLASSIFICATION: Concrete Post
The bench mark is on the northern shore, 63.0 feet (19.2 m) north of Bench Mark
NO STAMPING 1, 52.1 feet (15.9 m) east of Bench Mark STATION IS 2 1933, 30.5
feet (9.3 m) SE of a triple oak tree with a 0.9-foot (0.3 m) base diameter, and
29.9 feet (9.1 m) NNE of an 0.7-foot (0.2 m) cedar tree.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 6
PUBLICATION DATE: 10/28/1986
Station ID: 8668836 SUPERCEDED DATE: 04/21/2003
Name: STATION CREEK, WEST END
SOUTH CAROLINA
NOAA Chart: 11516 Latitude: 32° 16.8' N
USGS Quad: PARRIS ISLAND Longitude: 80° 38.3' W
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: STATION IS 2 1933
MONUMENTATION: Survey Disk VM#: 4524
AGENCY: PID#: CK3605
SETTING CLASSIFICATION: Concrete Monument
The bench mark is on the northern shore island, 52.1 feet (15.9 m) west of Bench
Mark ISLAND 1933, 22.1 feet (6.7 m) west of a 1.1-foot (0.3 m) diameter cedar
tree, 10.8 feet (3.3 m) NW of a 2.0-foot (0.6 m) diameter palmetto tree, 9.0
feet (2.7 m) SE of a 2.5-foot (0.8 m) diameter palmetto tree, and 2.8 feet (0.9
m) SE of a metal witness post.
BENCH MARK STAMPING: 8836 C 1980
MONUMENTATION: Survey Disk VM#: 4526
AGENCY: PID:
SETTING CLASSIFICATION: Stainless Steel Rod
The bench mark is on the southern shore, 363.0 feet (110.6 m) SE of the S.C.
sign, 259.7 feet (79.2 m) north of Bench Mark 8836 H 1982, 130.8 feet (39.9 m)
SSW of Bench Mark 8836 F 1982, 112.2 feet (34.2 m) NE of Bench Mark 8836 G 1982,
and 4.4 feet (1.3 m) north of a metal witness post. The bench mark is crimped
to a stainless steel rod driven 35 feet (11 m) to refusal, encased in a 4-inch
PVC pipe and concrete kickblock, and 0.2 foot (0.1 m) above ground level.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 6
PUBLICATION DATE: 10/28/1986
Station ID: 8668836 SUPERCEDED DATE: 04/21/2003
Name: STATION CREEK, WEST END
SOUTH CAROLINA
NOAA Chart: 11516 Latitude: 32° 16.8' N
USGS Quad: PARRIS ISLAND Longitude: 80° 38.3' W
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 8836 F 1982
MONUMENTATION: Survey Disk VM#: 4527
AGENCY: PID:
SETTING CLASSIFICATION: Stainless Steel Rod
The bench mark is on the southern shore, 180.5 feet (55.0 m) SSE of the S.C.
sign, 130.8 feet (39.9 m) NNE of Bench Mark 8836 C 1980, 130.0 feet (39.6 m) SW
of Bench Mark 8836 A 1980, and 2.4 feet (0.7 m) north of a metal witness post.
The bench mark is crimped to a stainless steel rod driven 48 feet (15 m) to
refusal, encased in a 4-inch PVC pipe and concrete kickblock, and 0.2 foot (0.1
m) above ground level.
BENCH MARK STAMPING: 8836 G 1982
MONUMENTATION: Survey Disk VM#: 4528
AGENCY: PID:
SETTING CLASSIFICATION: Stainless Steel Rod
The bench mark is on the southern shore, 193.9 feet (59.1 m) NW of Bench Mark
8836 H 1982, 112.2 feet (34.2 m) SW of Bench Mark 8836 C 1980, and 6.0 feet (1.8
m) north of a metal witness post. The bench mark is crimped to a stainless
steel rod driven 48 feet (15 m) to refusal, encased in a 4-inch PVC pipe and
concrete kickblock, and 0.6 foot (0.2 m) above ground level.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 6
PUBLICATION DATE: 10/28/1986
Station ID: 8668836 SUPERCEDED DATE: 04/21/2003
Name: STATION CREEK, WEST END
SOUTH CAROLINA
NOAA Chart: 11516 Latitude: 32° 16.8' N
USGS Quad: PARRIS ISLAND Longitude: 80° 38.3' W
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 8836 H 1982
MONUMENTATION: Survey Disk VM#: 4529
AGENCY: PID:
SETTING CLASSIFICATION: Stainless Steel Rod
The bench mark is on the southern shore, 259.7 feet (79.2 m) south of Bench Mark
8836 C 1980, 193.9 feet (59.1 m) SE of Bench Mark 8836 G 1982, and 2.5 feet (0.8
m) NW of a metal witness post. The bench mark is crimped to a stainless steel
rod driven 48 feet (15 m) to refusal, encased in a 4-inch PVC pipe and concrete
kickblock, and 0.6 foot (0.2 m) above ground level.
BENCH MARK STAMPING: NO 1
MONUMENTATION: Survey Disk VM#: 4530
AGENCY: PID:
SETTING CLASSIFICATION: Concrete Monument
The bench mark is on the northern shore, within a wedge-shaped oyster spit,
104.7 feet (31.9 m) south of Bench Mark NO STAMPING 1, 13.9 feet (4.2 m) north
of the oyster spit edge, 12.0 feet (3.7 m) east of the oyster spit edge, 8.9
feet (2.7 m) SE of a 3-foot (0.9 m) diameter myrtle bush, and 8.5 feet (2.6 m)
west of the oyster spit edge.
BENCH MARK STAMPING: NO STAMPING 1
MONUMENTATION: Survey Disk VM#: 4531
AGENCY: PID:
SETTING CLASSIFICATION: Concrete Monument
The bench mark is on the northern shore, at the shore end of a shell bank
extending SE of the wooded island area, 104.7 feet (31.9 m) north of Bench Mark
N0 1, 63.0 feet (19.2 m) south of Bench Mark ISLAND 1933, 23.3 feet (7.1 m) SSW
of a 0.5-foot (0.2 m) diameter oak tree and 4.0 feet (1.2 m) NE of an edge of
the oyster spit.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 6
PUBLICATION DATE: 10/28/1986
Station ID: 8668836 SUPERCEDED DATE: 04/21/2003
Name: STATION CREEK, WEST END
SOUTH CAROLINA
NOAA Chart: 11516 Latitude: 32° 16.8' N
USGS Quad: PARRIS ISLAND Longitude: 80° 38.3' W
T I D A L D A T U M S
Tidal datums at STATION CREEK, WEST END based on:
LENGTH OF SERIES: 5 MONTHS
TIME PERIOD: SEPTEMBER 1980-MAY 1981
TIDAL EPOCH: 1960-1978
CONTROL TIDE STATION: 8670870 FORT PULASKI, GA
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in FEET:
HIGHEST OBSERVED WATER LEVEL (05/05/1981) = 9.32
MEAN HIGHER HIGH WATER (MHHW) = 7.18
MEAN HIGH WATER (MHW) = 6.82
MEAN TIDE LEVEL (MTL) = 3.51
MEAN LOW WATER (MLW) = 0.20
MEAN LOWER LOW WATER (MLLW) = 0.00
LOWEST OBSERVED WATER LEVEL (04/06/1981) = -1.98
National Geodetic Vertical Datum (NGVD 29)
Bench Mark Elevation Information In FEET above:
Stamping or Designation MLLW MHW
8836 A 1980 7.43 0.61
ISLAND 1933 11.29 4.47
STATION IS 2 1933 11.36 4.54
8836 C 1980 7.43 0.61
8836 F 1982 7.86 1.04
8836 G 1982 7.90 1.08
8836 H 1982 7.45 0.63
NO 1 8.98 2.16
NO STAMPING 1 8.41 1.59
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 6
PUBLICATION DATE: 10/28/1986
Station ID: 8668836 SUPERCEDED DATE: 04/21/2003
Name: STATION CREEK, WEST END
SOUTH CAROLINA
NOAA Chart: 11516 Latitude: 32° 16.8' N
USGS Quad: PARRIS ISLAND Longitude: 80° 38.3' 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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