U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 5
PUBLICATION DATE: 02/17/1988
Station ID: 8661558 SUPERCEDED DATE: 04/21/2003
Name: HOLLY GROVE PLANTATION, PEE DEE RIVER
SOUTH CAROLINA
NOAA Chart: Latitude: 33° 33.1' N
USGS Quad: PLANTERSVILLE Longitude: 79° 10.6' W
To reach the tidal bench marks from the intersection of U.S. Highway 701 and
State Road S-22-52 in Plantersville, proceed east on State Road S-22-52 for 1.6
miles (2.6 km) to State Road S-22-264, turn left on State Road S-22-264 for 1.5
miles (2.4 km) to a dirt drive with a sign reading Holly Grove Plantation,
travel on the dirt drive 0.5 mile (0.8 km) to a large white house, turn right
and proceed 0.8 mile (1.3 km) to a T intersection, turn left and proceed 0.2
mile (0.3 km) to the end of the dirt drive. The bench marks are located along
the dirt drive between the water ditch and the circle. The gage and staff were
on the offshore end of the wharf at the end of the dirt drive.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 1558 D 1981
MONUMENTATION: Survey Disk VM#: 3790
AGENCY: PID#: DD2258
SETTING CLASSIFICATION: Stainless Steel Rod
The bench mark is 120.0 feet (36.6 m) west of the west bank of the river, 69.0
feet (21.0 m) NNE of a 3.5-foot (1.1 m) diameter pine tree, 35.3 feet (10.8 m)
east of a 4-foot (1.2 m) diameter oak tree, 15.7 feet (4.8 m) SSW of a cleared
path leading to the wharf, and 13.4 feet (4.1 m) ESE of the center of the dirt
drive circling back to the west. The bench mark is 0.2 foot (0.1 m) above the
ground, crimped to a stainless steel rod driven 40 feet (12 m) to refusal, and
encased in a PVC pipe and concrete kickblock.
BENCH MARK STAMPING: REIVE 1934 1981
MONUMENTATION: Survey Disk VM#: 3787
AGENCY: PID#: DD2255
SETTING CLASSIFICATION: Concrete Monument
The bench mark is 158.0 feet (48.2 m) NW of Bench Mark 1558 D 1981, 52.3 feet
(15.9 m) south of the SW corner of a one-story wooden barn, 35.5 feet (10.8 m)
ENE of a 3-foot (0.9 m) diameter oak tree, 20.2 feet (6.2 m) SSW of a 3-foot
(0.9 m) diameter pine tree, 1.6 feet (0.5 m) WSW of a witness post with sign,
and 0.2 foot (0.1 m) above the ground.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 5
PUBLICATION DATE: 02/17/1988
Station ID: 8661558 SUPERCEDED DATE: 04/21/2003
Name: HOLLY GROVE PLANTATION, PEE DEE RIVER
SOUTH CAROLINA
NOAA Chart: Latitude: 33° 33.1' N
USGS Quad: PLANTERSVILLE Longitude: 79° 10.6' W
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: REIVE NO 2 1934
MONUMENTATION: Survey Disk VM#: 3788
AGENCY: PID#: DD2256
SETTING CLASSIFICATION: Concrete Monument
The bench mark is 105.0 feet (32.0 m) NW of Bench Mark REIVE 1934 1981, 84.9
feet (25.9 m) west of the SW corner of a one-story wooden barn, 42.4 feet (12.9
m) NNE of a 3.5-foot (1.1 m) diameter oak tree, 5.0 feet (1.5 m) SSW of a
4.0-foot (1.2 m) diameter oak tree, 1.0 foot (0.3 m) ENE of a witness post with
sign, and level with the ground.
BENCH MARK STAMPING: REIVE 1981 NO 4 1934
MONUMENTATION: Survey Disk VM#: 3789
AGENCY: PID#: DD2257
SETTING CLASSIFICATION: Concrete Monument
The bench mark is 120.2 feet (36.6 m) south of Bench Mark REIVE NO 2 1934, 67.5
feet (20.6 m) SW of Bench Mark REIVE 1934 1981, 54.4 feet (16.6 m) south of a
4-foot (1.2 m) diameter oak tree, 53.9 feet (16.4 m) ENE of a 4-foot (1.2 m)
diameter pine tree, 9.6 feet (2.9 m) NNE of the centerline of the dirt drive
leading to the wharf, 1.0 foot (0.3 m) SW of a witness post with sign, and 0.2
foot (0.1 m) above the ground.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 5
PUBLICATION DATE: 02/17/1988
Station ID: 8661558 SUPERCEDED DATE: 04/21/2003
Name: HOLLY GROVE PLANTATION, PEE DEE RIVER
SOUTH CAROLINA
NOAA Chart: Latitude: 33° 33.1' N
USGS Quad: PLANTERSVILLE Longitude: 79° 10.6' W
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 1558 E 1981
MONUMENTATION: Survey Disk VM#: 3791
AGENCY: PID#: DD2254
SETTING CLASSIFICATION: Stainless Steel Rod
The bench mark is 170.0 feet (51.8 m) WNW of Bench Mark REIVE 1981 NO 4 1934,
48.3 feet (14.7 m) SW of a 3-foot (0.9 m) diameter pine tree, 26.9 feet (8.2 m)
SW of the centerline of the dirt drive leading to the wharf, and 23.4 feet (7.1
m) west of a 4-foot (1.2 m) diameter oak tree. The bench mark is 0.2 foot (0.1
m) above the ground, crimped to a stainless steel rod driven 41 feet (12 m) to
refusal, and encased in a PVC pipe and concrete kickblock.
BENCH MARK STAMPING: 1558 F 1981
MONUMENTATION: Survey Disk VM#: 3792
AGENCY: PID#: DD2253
SETTING CLASSIFICATION: Stainless Steel Rod
The bench mark is 165.0 feet (50.3 m) east of the intersection of two dirt roads
(one leading north and the other leading west), 24.0 feet (7.3 m) NNW of a
3-foot (0.9 m) diameter oak tree, 18.7 feet (5.7 m) south of the center of a
water ditch between the dirt road and an open field, 10.0 feet (3.0 m) WSW of a
4-foot (1.2 m) diameter oak tree, 9.6 feet (2.9 m) north of the centerline of
the dirt road leading to the wharf, and 8.6 feet (2.6 m) east of a witness post
with red tape. The bench mark is 0.2 foot (0.1 m) above the ground, crimped to
a stainless steel rod driven 40 feet (12 m) to refusal, and encased in a PVC
pipe and concrete kickblock.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 5
PUBLICATION DATE: 02/17/1988
Station ID: 8661558 SUPERCEDED DATE: 04/21/2003
Name: HOLLY GROVE PLANTATION, PEE DEE RIVER
SOUTH CAROLINA
NOAA Chart: Latitude: 33° 33.1' N
USGS Quad: PLANTERSVILLE Longitude: 79° 10.6' W
T I D A L D A T U M S
Tidal datums at HOLLY GROVE PLANTATION, PEE DEE RIVER based on:
LENGTH OF SERIES: 6 MONTHS
TIME PERIOD: JANUARY-DECEMBER 1982
TIDAL EPOCH: 1960-1978
CONTROL TIDE STATION: 8661139 BUCKSPORT
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in FEET:
HIGHEST OBSERVED WATER LEVEL (03/31/1983) = 6.41
MEAN HIGHER HIGH WATER MHHW = 2.82
MEAN HIGH WATER MHW = 2.72
MEAN TIDE LEVEL MTL = 1.43
MEAN LOW WATER MLW = 0.13
MEAN LOWER LOW WATER MLLW = 0.00
LOWEST OBSERVED WATER LEVEL (09/21/1982) = -0.70
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In FEET above:
Stamping or Designation MLLW MHW
1558 D 1981 5.16 2.44
REIVE 1934 1981 13.54 10.82
REIVE NO 2 1934 12.28 9.56
REIVE 1981 NO 4 1934 13.52 10.80
1558 E 1981 6.72 4.00
1558 F 1981 14.51 11.79
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 5
PUBLICATION DATE: 02/17/1988
Station ID: 8661558 SUPERCEDED DATE: 04/21/2003
Name: HOLLY GROVE PLANTATION, PEE DEE RIVER
SOUTH CAROLINA
NOAA Chart: Latitude: 33° 33.1' N
USGS Quad: PLANTERSVILLE Longitude: 79° 10.6' 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.