Bench Mark Sheet for 8663665, RICHMOND PLANTATION, E. BR. COOPER 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Superseded Epoch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Small blue map location marker Unpublished bench mark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: 8663665                         PUBLICATION DATE:  02/05/2004
Name:       RICHMOND PLANTATION, E. BR. COOPER RIVER          
            SC
NOAA Chart: 11527                           Latitude:   33°  4.6' N (  33.07670)
USGS Quad:  HUGER                           Longitude:  79° 51.3' W ( -79.85500)


To reach the tidal bench marks from the intersection of State Highway 41 and
State Highway 402 in Huger, proceed north on State Highway 402 for 10.6 km (6.6
mi) to the entrance of Richmond Plantation Girl Scout Camp, then turn into the
camp and proceed SE on the entrance road for 5.07 km (3.15 mi) to a brick gate,
then continue SE through the gate on the sand road for 0.40 km (0.25 mi) to a
large brick house (administration building).  The bench marks are located on the
Camp grounds.  The tide gage and staff were located on the dock SE of the
brickhouse.


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


                 PRIMARY BENCH MARK STAMPING:  3665 A 1976
                         DESIGNATION:          866 3665 A TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         4008
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  DD1225
SETTING CLASSIFICATION:  Copper-clad steel rod                 OPUS PID:        
LATITUDE:   33°  4.7' N (  33.07830)          LONGITUDE:  79° 51.4' W ( -79.85670)


The primary bench mark is a disk located north of a small wooden bridge that
spans a canal ditch on the grass track road leading to the dock, 53.58 m (175.8
ft) ESE of a twin limbed 2.29 m (7.5 ft) diameter oak tree, 6.43 m (21.1 ft)
north of the north corner of the wooden bridge, 4.57 m (15.0 ft) ENE of the
centerline of the grass track road leading to the dock, 4 m (12 ft) NW of the NW
edge of the canal ditch, and 1.95 m (6.4 ft) WNW of a 0.46 m (1.5 ft) diameter
palmetto tree.  The bench mark is at ground level, crimped to the top of a
copper clad steel rod driven 7.3 m (24 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: 8663665                         PUBLICATION DATE:  02/05/2004
Name:       RICHMOND PLANTATION, E. BR. COOPER RIVER          
            SC
NOAA Chart: 11527                           Latitude:   33°  4.6' N (  33.07670)
USGS Quad:  HUGER                           Longitude:  79° 51.3' W ( -79.85500)


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


                         BENCH MARK STAMPING:  3665 B 1976
                         DESIGNATION:          866 3665 B TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         4009
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  DD1224
SETTING CLASSIFICATION:  Copper pipe                           OPUS PID:        
LATITUDE:   33°  4.7' N (  33.07830)          LONGITUDE:  79° 51.4' W ( -79.85670)


The bench mark is a disk located west of the small wooden bridge that spans a
canal ditch on the grass track road leading to the dock, 21.34 m (70.0 ft) east
of the center of a bamboo tree/bush, 8.72 m (28.6 ft) SSW of bench mark 3665 A
1976, 3.81 m (12.5 ft) NNE of a 2.04 m (6.7 ft) diameter oak tree, 3.32 m (10.9
ft) WNW of the west corner of the wooden bridge, and 3.26 m (10.7 ft) SW of the
centerline of the grass track road leading to the dock.  The bench mark is at
ground level, brazed to the top of a 2-inch diameter copper pipe driven 1.2 m (4
ft) into the ground, and encased in compacted soilcrete.



                         BENCH MARK STAMPING:  3665 C 1976
                         DESIGNATION:          866 3665 C TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         4010
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  DD1223
SETTING CLASSIFICATION:  Copper-clad steel rod                 OPUS PID:        
LATITUDE:   33°  4.7' N (  33.07830)          LONGITUDE:  79° 51.4' W ( -79.85670)


The bench mark is a disk located SE of the brick house on the SW side of the
grass track road leading to the dock, 79.25 m (260.0 ft) NNW of bench mark 3665
B 1976, 51.57 m (169.2 ft) SE of the SE corner of the brick house, 7.16 m (23.5
ft) SW of the centerline of the road, 5.79 m (19.0 ft) west of a 0.61 m (2.0 ft)
diameter sweet gum tree with a 6 on it, and 4.45 m (14.6 ft) north of a twin
trunked holly tree.  The bench mark is at ground level, crimped to the top of a
copper clad steel rod driven 3.7 m (12 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: 8663665                         PUBLICATION DATE:  02/05/2004
Name:       RICHMOND PLANTATION, E. BR. COOPER RIVER          
            SC
NOAA Chart: 11527                           Latitude:   33°  4.6' N (  33.07670)
USGS Quad:  HUGER                           Longitude:  79° 51.3' W ( -79.85500)


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


                         BENCH MARK STAMPING:  3665 D 1976
                         DESIGNATION:          866 3665 D TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         4011
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  DD1222
SETTING CLASSIFICATION:  Copper-clad steel rod                 OPUS PID:        
LATITUDE:   33°  4.8' N (  33.08000)          LONGITUDE:  79° 51.4' W ( -79.85670)


The bench mark is a disk located at the east corner of the intersection of a
sand road leading to some cabins and the grass track road leading to the dock,
near an old iron street lamp beside the brick house, 48.46 m (159.0 ft) NNE of
the north corner of the brick house, 15 m (49 ft) ESE of a lone magnolia tree, 8
m (26 ft) ENE of the centerline of the grass track road, 7.38 m (24.2 ft) SSE of
the centerline of the sand road leading to the cabins, and 4.27 m (14.0 ft) ESE
of the street lamp.  The bench mark is at ground level, crimped to the top of a
copper-clad steel rod driven 5.5 m (18 ft) to refusal, and encased in a 4-inch
PVC pipe and concrete kickblock.



                         BENCH MARK STAMPING:  3665 E 1976
                         DESIGNATION:          866 3665 E TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         4012
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  DD1221
SETTING CLASSIFICATION:  Copper pipe                           OPUS PID:        
LATITUDE:   33°  4.8' N (  33.08000)          LONGITUDE:  79° 51.5' W ( -79.85830)


The bench mark is a disk near the SE corner of the brick wall surrounding a
garden NW of the brick house, 29.57 m (97.0 ft) WSW of the main sand road, 6.55
m (21.5 ft) NNE of a 2.04 m (6.7 ft) diameter oak tree, 1.52 m (5.0 ft) SW of
the SE corner of the brick wall, 0.64 m (2.1 ft) SSE of the brick wall, and at
ground level.  The bench mark is set at ground level, brazed to the top of a
2-inch diameter copper pipe driven 1.2 m (4 ft) into the ground, and encased in
compacted soilcrete.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  4 of  5

                                                                                
Station ID: 8663665                         PUBLICATION DATE:  02/05/2004
Name:       RICHMOND PLANTATION, E. BR. COOPER RIVER          
            SC
NOAA Chart: 11527                           Latitude:   33°  4.6' N (  33.07670)
USGS Quad:  HUGER                           Longitude:  79° 51.3' W ( -79.85500)


                            T I D A L   D A T U M S 


Tidal datums at RICHMOND PLANTATION, E. BR. COOPER RIVER based on:

     LENGTH OF SERIES:      1 YEAR
     TIME PERIOD:           September 1976 - August 1977
     TIDAL EPOCH:           1983-2001
     CONTROL TIDE STATION:  8664022 GEN. DYNAMICS PIER, COOPER R.


Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:

     HIGHEST OBSERVED WATER LEVEL (11/21/1976)         =  1.294
     MEAN HIGHER HIGH WATER                     MHHW   =  0.952
     MEAN HIGH WATER                            MHW    =  0.891
     MEAN SEA LEVEL                             MSL    =  0.520
     MEAN TIDE LEVEL                            MTL    =  0.484
     North American Vertical Datum              NAVD88 =  0.164
     MEAN LOW WATER                             MLW    =  0.078
     MEAN LOWER LOW WATER                       MLLW   =  0.000
     LOWEST  OBSERVED WATER LEVEL (02/25/1977)         = -0.547

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     3665 A 1976                                 1.739    0.848
     3665 B 1976                                 1.816    0.925
     3665 C 1976                                 5.885    4.994
     3665 D 1976                                 9.250    8.359
     3665 E 1976                                 8.499    7.608


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

                                                                                
Station ID: 8663665                         PUBLICATION DATE:  02/05/2004
Name:       RICHMOND PLANTATION, E. BR. COOPER RIVER          
            SC
NOAA Chart: 11527                           Latitude:   33°  4.6' N (  33.07670)
USGS Quad:  HUGER                           Longitude:  79° 51.3' W ( -79.85500)


                             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 8663665 RICHMOND PLANTATION, E. BR. COOPER RIVER, SC