U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 7
Station ID: 8668498 PUBLICATION DATE: 10/20/2011
Name: HUNTING ISLAND PIER, FRIPPS INLET
SC
NOAA Chart: 11513 Latitude: 32° 20.4' N ( 32.34000)
USGS Quad: FRIPPS INLET Longitude: 80° 27.9' W ( -80.46500)
To reach the tidal bench marks from the west side of the Richard V. Wood
Memorial Bridge in Beaufort, proceed south and east on State Highway 21 for 48
km (30 mi) to the bridge over Fripps Inlet. The bench marks are located on the
north end of the bridge and extend along State Route 7-439. The tide gage and
staff were located midway on the east side of the bridge near two groups of
pilings.
T I D A L B E N C H M A R K S
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 7
Station ID: 8668498 PUBLICATION DATE: 10/20/2011
Name: HUNTING ISLAND PIER, FRIPPS INLET
SC
NOAA Chart: 11513 Latitude: 32° 20.4' N ( 32.34000)
USGS Quad: FRIPPS INLET Longitude: 80° 27.9' W ( -80.46500)
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: KRELL 1963
DESIGNATION: KRELL
MONUMENTATION: Triangulation Station disk VM#: 4496
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: CK2355
SETTING CLASSIFICATION: Concrete OPUS PID:
LATITUDE: 32° 20.6' N ( 32.34330) LONGITUDE: 80° 27.8' W ( -80.46330)
The primary bench mark is a disk set flush in concrete at the NE end of the
bridge, 8.78 m (28.8 ft) SE of bench mark Krell No 2 1963, 8.53 m (28.0 ft) NNE
of bench mark Krell No 1 1963, 4.27 m (14.0 ft) SE of the centerline of the
bridge, 3.41 m (11.2 ft) SSW of the NE corner of the bridge, and 0.91 m (3.0 ft)
WNW of the bridge railing.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 7
Station ID: 8668498 PUBLICATION DATE: 10/20/2011
Name: HUNTING ISLAND PIER, FRIPPS INLET
SC
NOAA Chart: 11513 Latitude: 32° 20.4' N ( 32.34000)
USGS Quad: FRIPPS INLET Longitude: 80° 27.9' W ( -80.46500)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: KRELL NO 1 1963
DESIGNATION: KRELL RM 1
MONUMENTATION: Reference Mark disk VM#: 4497
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: CK2356
SETTING CLASSIFICATION: Concrete OPUS PID:
LATITUDE: 32° 20.6' N ( 32.34330) LONGITUDE: 80° 27.8' W ( -80.46330)
The bench mark is a disk set flush in concrete at the NE end of the bridge,
14.54 m (47.7 ft) SSE of Bench Mark Krell No 2 1963, 12 m (39 ft) south of the
NE corner of the bridge, 5 m (16 ft) ESE of the centerline of the bridge, and
0.3 m (1.0 ft) west of the east bridge railing.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 7
Station ID: 8668498 PUBLICATION DATE: 10/20/2011
Name: HUNTING ISLAND PIER, FRIPPS INLET
SC
NOAA Chart: 11513 Latitude: 32° 20.4' N ( 32.34000)
USGS Quad: FRIPPS INLET Longitude: 80° 27.9' W ( -80.46500)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: KRELL NO 2 1963
DESIGNATION: KRELL RM 2
MONUMENTATION: Reference Mark disk VM#: 4498
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: CK2357
SETTING CLASSIFICATION: Concrete OPUS PID:
LATITUDE: 32° 20.6' N ( 32.34330) LONGITUDE: 80° 27.8' W ( -80.46330)
The bench mark is a disk set flush in concrete at the NW end of the bridge,
14.54 m (47.7 ft) NNW of Bench Mark Krell No 1 1963, 8.78 m (28.8 ft) NW of
Bench Mark Krell 1963, 5.39 m (17.7 ft) WNW of the centerline of the bridge, and
0.37 m (1.2 ft) east of the NW corner of the bridge.
BENCH MARK STAMPING: 8498 D 1977
DESIGNATION: 866 8498 D TIDAL
MONUMENTATION: Tidal Station disk VM#: 4499
AGENCY: National Ocean Survey (NOS) IDB PID#: CK2352
SETTING CLASSIFICATION: Galvanized steel rod OPUS PID:
LATITUDE: 32° 20.6' N ( 32.34330) LONGITUDE: 80° 27.8' W ( -80.46330)
The bench mark is a disk located in a grassy area NE of the bridge, 67.60 m
(221.8 ft) ENE of bench mark 8498 F 1977, 15.24 m (50.0 ft) east of the
centerline of County Road S-7-406, 11.43 m (37.5 ft) SSE of the centerline of
County Road S-7-439, and 3.93 m (12.9 ft) north of the utility pole NO 272301.
The bench mark is set 0.3 m (1.0 ft) below ground level, crimped to the top of a
galvanized steel rod driven 4.6 m (15 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 5 of 7
Station ID: 8668498 PUBLICATION DATE: 10/20/2011
Name: HUNTING ISLAND PIER, FRIPPS INLET
SC
NOAA Chart: 11513 Latitude: 32° 20.4' N ( 32.34000)
USGS Quad: FRIPPS INLET Longitude: 80° 27.9' W ( -80.46500)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 8498 G 2003
DESIGNATION: 866 8498 G
MONUMENTATION: Tidal Station disk VM#: 17573
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete foundation OPUS PID:
LATITUDE: 32° 20.6' N ( 32.34330) LONGITUDE: 80° 27.7' W ( -80.46170)
The bench mark is a disk is set flush in a concrete light pole base located at
teh entrance to the fishing pier on the south side of the paved road, 14.08 m
(46.2 ft) NE of the NW corner of the pier house, 5.82 m (19.1 ft) west of the
west edge of the pier ramp, 4.27 m (14.0 ft) ENE of a fire hydrant, and 0.91 m
(2.99 ft0 south of the south edge of the road pavement.
BENCH MARK STAMPING:
DESIGNATION: 866 8498 NO STAMPING 1
MONUMENTATION: Tidal Station disk VM#: 17574
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Unspecified deep rod OPUS PID:
LATITUDE: 32° 20.6' N ( 32.34330) LONGITUDE: 80° 27.7' W ( -80.46170)
The bench mark is a disk located on the south side of the paved park road, 44.99
m (147.6 ft) west of the west edge of the pier, 25.91 m (85.0 ft) WSW of power
pole 318358, 7.10 m (23.3 ft) NNE of power pole 433739, and 1.01 m (3.3 ft) NE
of a witness post. The bench mark is crimped to an unspecified deep rod driven
to an unspecified depth, and encased in PVC pipe.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 7
Station ID: 8668498 PUBLICATION DATE: 10/20/2011
Name: HUNTING ISLAND PIER, FRIPPS INLET
SC
NOAA Chart: 11513 Latitude: 32° 20.4' N ( 32.34000)
USGS Quad: FRIPPS INLET Longitude: 80° 27.9' W ( -80.46500)
T I D A L D A T U M S
Tidal datums at HUNTING ISLAND PIER, FRIPPS INLET based on:
LENGTH OF SERIES: 3 YEARS
TIME PERIOD: March 2004 - February 2007
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 (06/15/2007) = 2.741
MEAN HIGHER HIGH WATER MHHW = 2.038
MEAN HIGH WATER MHW = 1.921
North American Vertical Datum NAVD88 = 1.114
MEAN SEA LEVEL MSL = 1.025
MEAN TIDE LEVEL MTL = 0.991
MEAN LOW WATER MLW = 0.061
MEAN LOWER LOW WATER MLLW = 0.000
LOWEST OBSERVED WATER LEVEL (01/29/1979) = -0.997
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
KRELL 1963 5.809 3.888
KRELL NO 1 1963 5.902 3.981
KRELL NO 2 1963 5.783 3.862
8498 D 1977 3.228 1.307
8498 G 2003 3.445 1.524
866 8498 NO STAMPING 1 3.228 1.307
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 7 of 7
Station ID: 8668498 PUBLICATION DATE: 10/20/2011
Name: HUNTING ISLAND PIER, FRIPPS INLET
SC
NOAA Chart: 11513 Latitude: 32° 20.4' N ( 32.34000)
USGS Quad: FRIPPS INLET Longitude: 80° 27.9' W ( -80.46500)
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.