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Bench Mark Sheet for 8665763, CHURCH FLATS, STONO RIVER SC

Superseded Epoch

Large map location marker Station Location
Small red map location marker Published bench mark
Small blue map location marker Unpublished bench mark

Bench mark positions only appear on the map if their coordinates in the CO-OPS database are at the precision of degrees/minutes/seconds/and tenths of seconds. If the coordinates are less precise, the mark will not appear.

Printable version

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
Datums Page                                                        Page  1 of  5

                                                                                
Station ID: 8665763                         PUBLICATION DATE:  02/05/2004
Name:       CHURCH FLATS, STONO RIVER                         
            SC
NOAA Chart: 11522                           Latitude:   32° 44.8' N (  32.74670)
USGS Quad:  WADMALAW ISLAND                 Longitude:  80°  9.9' W ( -80.16500)


To reach the tidal bench marks from the US Post Office in Hollywood, proceed NE
along State Highway 162 for 6.8 km (4.2 mi) to a Y-junction, then turn right and
proceed SE along Bryan Road for 1.0 km (0.6 mi) to a grassy road, then proceed
east along the grassy road for 0.2 km (0.1 mi) to a large one story brick
residence (Boone residence).  The tidal bench marks are along the grassy road
and at the Boone residence.  The tide gauge and staff were located at the end of
the pier on the Boone property.


                         T I D A L   B E N C H   M A R K S


                 PRIMARY BENCH MARK STAMPING:  5763 A 1976
                         DESIGNATION:          866 5763 A TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         6716
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  CK2496
SETTING CLASSIFICATION:  Copper-clad steel rod                 OPUS PID:        
LATITUDE:   12° 44.7' N (  12.74500)          LONGITUDE:  80°  9.9' W ( -80.16500)


The primary bench mark is a disk set near the foot of the pier, 18.20 m (59.7
ft) SSW of the SW corner of the pier, 16.64 m (54.6 ft) ESE of the NE corner of
the house, 14.93 m (49.0 ft) NNW of the northernmost brick pillars of the brick
steps leading to the water, 6.71 m (22.0 ft) west of the SE corner of a cinder
block sea wall, and 2.62 m (8.6 ft) west of the river bank.  The bench mark is
set 30 cm (1 ft) below grade, crimped to the top of a copper-clad steel rod
driven 4.9 m (16 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  2 of  5

                                                                                
Station ID: 8665763                         PUBLICATION DATE:  02/05/2004
Name:       CHURCH FLATS, STONO RIVER                         
            SC
NOAA Chart: 11522                           Latitude:   32° 44.8' N (  32.74670)
USGS Quad:  WADMALAW ISLAND                 Longitude:  80°  9.9' W ( -80.16500)


                         T I D A L   B E N C H   M A R K S


                         BENCH MARK STAMPING:  5763 B 1976
                         DESIGNATION:          866 5763 B TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         6717
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:        
SETTING CLASSIFICATION:  Concrete monument                     OPUS PID:        
LATITUDE:   12° 44.8' N (  12.74670)          LONGITUDE:  80°  9.9' W ( -80.16500)


The bench mark is a disk set in a concrete monument located to the SW of the
circular driveway of the brick residence, 35.20 m (115.5 ft) SSW of a magnolia
tree in the center of the driveway, 20.73 m (68.0 ft) NW of the tree line along
the river, and 2.56 m (8.4 ft) south of an unused 2 m (6 ft) tall power pole.



                         BENCH MARK STAMPING:  5763 C 1976
                         DESIGNATION:          866 5763 C TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         6718
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  CK2495
SETTING CLASSIFICATION:  Copper-clad steel rod                 OPUS PID:        
LATITUDE:   12° 44.7' N (  12.74500)          LONGITUDE:  80°  9.9' W ( -80.16500)


The bench mark is a disk set located near the driveway entrance to the brick
residence, 46 m (150 ft) west of a magnolia tree in the center of the driveway,
32.25 m (105.8 ft) ENE of the NE corner of a swimming pool, 3.66 m (12.0 ft) SSW
of the approximate center of the driveway, and 1.22 m (4.0 ft) south of the
south driveway entrance gatepost.  The bench mark is set 3 cm (0.1 ft) below
grade, crimped to the top of a copper-clad steel rod driven 6.1 m (20 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  5

                                                                                
Station ID: 8665763                         PUBLICATION DATE:  02/05/2004
Name:       CHURCH FLATS, STONO RIVER                         
            SC
NOAA Chart: 11522                           Latitude:   32° 44.8' N (  32.74670)
USGS Quad:  WADMALAW ISLAND                 Longitude:  80°  9.9' W ( -80.16500)


                         T I D A L   B E N C H   M A R K S


                         BENCH MARK STAMPING:  5763 D 1976
                         DESIGNATION:          866 5763 D TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         6719
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:        
SETTING CLASSIFICATION:  Concrete monument                     OPUS PID:        
LATITUDE:   12° 44.8' N (  12.74670)          LONGITUDE:  80°  9.9' W ( -80.16500)


The bench mark is a disk set in a concrete monument located along the southern
side of the grassy road leading to the brick residence, 16.22 m (53.2 ft) SW of
the west corner of a summer house, 3.47 m (11.4 ft) SE of the centerline of a
grassy road, and 1.07 m (3.5 ft) SW of the southernmost poplar tree in a line of
four poplars.



                         BENCH MARK STAMPING:  5763 E 1976
                         DESIGNATION:          866 5763 E TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         6720
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:        
SETTING CLASSIFICATION:  Copper-clad steel rod                 OPUS PID:        
LATITUDE:   12° 44.8' N (  12.74670)          LONGITUDE:  80°  9.9' W ( -80.16500)


The bench mark is a disk located at the corner where the grassy road turns
toward the brick residence, 7 m (23 ft) NE of the centerline of the road
perpendicular to the river, 6.40 m (21.0 ft) NW of the centerline of the road
leading to the brick residence, 3.60 m (11.8 ft) SW of the metal guy wire anchor
to a power pole, and 1.92 m (6.3 ft) NNE of SCE&G power pole #148944.  The bench
mark is crimped to the top of a copper-clad steel rod driven 6.1 m (20 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  4 of  5

                                                                                
Station ID: 8665763                         PUBLICATION DATE:  02/05/2004
Name:       CHURCH FLATS, STONO RIVER                         
            SC
NOAA Chart: 11522                           Latitude:   32° 44.8' N (  32.74670)
USGS Quad:  WADMALAW ISLAND                 Longitude:  80°  9.9' W ( -80.16500)


                            T I D A L   D A T U M S 


Tidal datums at CHURCH FLATS, STONO RIVER based on:

     LENGTH OF SERIES:      1 YEAR
     TIME PERIOD:           February 1977 - January 1978
     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 (06/01/1977)         =  2.568
     MEAN HIGHER HIGH WATER                     MHHW   =  2.112
     MEAN HIGH WATER                            MHW    =  2.010
     MEAN SEA LEVEL                             MSL    =  1.226
     North American Vertical Datum              NAVD88 =  1.206
     MEAN TIDE LEVEL                            MTL    =  1.039
     MEAN LOW WATER                             MLW    =  0.068
     MEAN LOWER LOW WATER                       MLLW   =  0.000
     LOWEST  OBSERVED WATER LEVEL (01/09/1978)         = -0.903

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     5763 A 1976                                 3.862    1.852
     5763 B 1976                                 5.356    3.346
     5763 C 1976                                 4.470    2.460
     5763 D 1976                                 5.078    3.068
     5763 E 1976                                 4.244    2.234


                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  5 of  5

                                                                                
Station ID: 8665763                         PUBLICATION DATE:  02/05/2004
Name:       CHURCH FLATS, STONO RIVER                         
            SC
NOAA Chart: 11522                           Latitude:   32° 44.8' N (  32.74670)
USGS Quad:  WADMALAW ISLAND                 Longitude:  80°  9.9' W ( -80.16500)


                             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.

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Products available at 8665763 CHURCH FLATS, STONO RIVER, SC

Revised: 08/08/2018
NOAA / National Ocean Service
Web site owner: Center for Operational Oceanographic Products and Services