U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 5
Station ID: 8664541 PUBLICATION DATE: 06/28/2004
Name: YEAMANS HALL, GOOSE CREEK
SC
NOAA Chart: 11524 Latitude: 32° 55.5' N ( 32.92500)
USGS Quad: NORTH CHARLESTON Longitude: 79° 59.2' W ( -79.98670)
To reach the tidal bench marks from the intersection of Rivers Avenue (U.S.
Highways 52 and 78) and Remount Road in Hanahan, proceed 0.56 km (0.35 mi) east
on Remount Road to Yeamans Hall Road, then turn left and proceed NE on Yeamans
Hall Road for 3.1 km (1.9 mi) to North Rhett Avenue, the proceed straight
through the intersection and continue NE on Yeamans Hall Road for 0.3 km (0.2
mi) to the entrance gate of Yeamans Hall, then continue through the gate for
0.08 km (0.05 mi) to a Y-intersection, then bear left at the intersection and
proceed NE for 0.56 km (0.35 mi) and then turn left and proceed down the
driveway of a private residence. The bench marks are along the dirt entrance
road and around the two-story brick house. The tide gage and staff were on a
private dock behind the house.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: NO 1 1934
DESIGNATION: 866 4541 TIDAL 1
MONUMENTATION: Tidal Station disk VM#: 4053
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: CJ0229
SETTING CLASSIFICATION: Concrete monument OPUS PID:
LATITUDE: 32° 55.6' N ( 32.92670) LONGITUDE: 79° 59.1' W ( -79.98500)
The primary bench mark is a disk set in a 0.3 m (1 ft) diameter terra cotta
drain tile filled with concrete, 15.21 m (49.9 ft) west of the SW corner of the
L.R. Drake residence, 6.31 m (20.7 ft) SE of the SE corner of a walkway leading
to a dock, 5.91 m (19.4 ft) SSE of a 24-inch oak tree, 4.11 m (13.5 ft) south of
the south edge of a step leading to the dock, and 2.99 m (9.8 ft) below the
level of the driveway.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 5
Station ID: 8664541 PUBLICATION DATE: 06/28/2004
Name: YEAMANS HALL, GOOSE CREEK
SC
NOAA Chart: 11524 Latitude: 32° 55.5' N ( 32.92500)
USGS Quad: NORTH CHARLESTON Longitude: 79° 59.2' W ( -79.98670)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: NO 2 1934
DESIGNATION: 866 4541 TIDAL 2
MONUMENTATION: Tidal Station disk VM#: 4054
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: CJ0228
SETTING CLASSIFICATION: Retaining wall OPUS PID:
LATITUDE: 32° 55.6' N ( 32.92670) LONGITUDE: 79° 59.1' W ( -79.98500)
The bench mark is a disk set in the retaining wall for the steps leading to the
basement at the SW corner of the brick house. NOTE: Mark not found in 1992 by
NGS.
BENCH MARK STAMPING: NO 3 1934
DESIGNATION: 866 4541 TIDAL 3
MONUMENTATION: Tidal Station disk VM#: 4055
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: CJ0227
SETTING CLASSIFICATION: Concrete floor OPUS PID:
LATITUDE: 32° 55.6' N ( 32.92670) LONGITUDE: 79° 59.1' W ( -79.98500)
The bench mark is a disk set in the NE corner of the concrete floor of a garage
at the L.R. Drake residence, 11.00 m (36.1 ft) east of the extended center of
the driveway, 1.31 m (4.3 ft) east of the center of the most easterly of 3
garage doors, 0.61 m (2.0 ft) west of the NE corner of the garage, and 0.30 m
(1.0 ft) below the level of the driveway.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 5
Station ID: 8664541 PUBLICATION DATE: 06/28/2004
Name: YEAMANS HALL, GOOSE CREEK
SC
NOAA Chart: 11524 Latitude: 32° 55.5' N ( 32.92500)
USGS Quad: NORTH CHARLESTON Longitude: 79° 59.2' W ( -79.98670)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 4541 H 1979
DESIGNATION: 866 4541 H TIDAL
MONUMENTATION: Tidal Station disk VM#: 4060
AGENCY: National Ocean Survey (NOS) IDB PID#: CJ0222
SETTING CLASSIFICATION: Stainless steel rod OPUS PID:
LATITUDE: 32° 55.6' N ( 32.92670) LONGITUDE: 79° 59.1' W ( -79.98500)
The bench mark is a disk located on the east side of the dirt entrance road,
12.13 m (39.8 ft) SE of the centerline of the dirt entrance road, 2.93 m (9.6
ft) NW of a 0.76 m (2.5 ft) diameter pine tree, and 1.04 m (3.4 ft) NW of the
edge of a slight clearing. The bench mark is 0.06 m (0.2 ft) below ground
level, crimped to the top of a stainless steel rod driven 7.3 m (24 ft) to
refusal, and encased in a PVC pipe and concrete kickblock. NOTE: Mark not found
in 1992 by National Geodetic Survey.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 5
Station ID: 8664541 PUBLICATION DATE: 06/28/2004
Name: YEAMANS HALL, GOOSE CREEK
SC
NOAA Chart: 11524 Latitude: 32° 55.5' N ( 32.92500)
USGS Quad: NORTH CHARLESTON Longitude: 79° 59.2' W ( -79.98670)
T I D A L D A T U M S
Tidal datums at YEAMANS HALL, GOOSE CREEK based on:
LENGTH OF SERIES: 1 YEAR
TIME PERIOD: February 1979 - January 1980
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION: 8665530 CHARLESTON, COOPER RIVER ENTRANCE
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
HIGHEST OBSERVED WATER LEVEL (09/04/1979) = 2.535
MEAN HIGHER HIGH WATER MHHW = 1.733
MEAN HIGH WATER MHW = 1.647
MEAN SEA LEVEL MSL = 1.025
North American Vertical Datum NAVD88 = 0.895
MEAN TIDE LEVEL MTL = 0.864
MEAN LOW WATER MLW = 0.080
MEAN LOWER LOW WATER MLLW = 0.000
LOWEST OBSERVED WATER LEVEL (02/01/1979) = -0.671
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
NO 1 1934 2.891 1.244
NO 2 1934 5.683 4.036
NO 3 1934 7.626 5.979
4541 H 1979 8.239 6.592
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 5
Station ID: 8664541 PUBLICATION DATE: 06/28/2004
Name: YEAMANS HALL, GOOSE CREEK
SC
NOAA Chart: 11524 Latitude: 32° 55.5' N ( 32.92500)
USGS Quad: NORTH CHARLESTON Longitude: 79° 59.2' W ( -79.98670)
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.