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Bench Mark Sheet for 8662216, CUMBERLAND, SAMPIT 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Superseded Epoch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Small blue map location marker Unpublished bench mark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: 8662216                         PUBLICATION DATE:  03/09/2004
Name:       CUMBERLAND, SAMPIT RIVER                          
            SC
NOAA Chart: 11532                           Latitude:   33° 22.2' N (  33.37000)
USGS Quad:  KILSOCK BAY                     Longitude:  79° 26.0' W ( -79.43330)


To reach the tidal bench marks from the intersection of U.S. Highway 17 and
State Road S-22-42 (Pennyroyal Road), SW of Georgetown, proceed west on S-22-42
for 15.4 km (9.6 mi) to S-22-498 (Woodland Avenue), then turn right and proceed
east on S-22-498 for 1.3 km (0.8 mi) to a three-way junction near the end of the
pavement past Greater Gethsemane Church, then turn left and proceed north on
Sparrow Drive (the dirt road) for 0.6 km (0.4 mi) to the gate of Mr. B. B.
Smith's property, then continue north for 0.2 km (0.1 mi) past the gate to the
Sampit River.  The bench marks are along Sparrow Drive.  The tide gage and staff
were located on a constructed dock on the gated property.


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


                 PRIMARY BENCH MARK STAMPING:  2216 B 1982
                         DESIGNATION:          866 2216 B TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         3910
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  DD1976
SETTING CLASSIFICATION:  Stainless steel rod                   OPUS PID:        
LATITUDE:   33° 22.2' N (  33.37000)          LONGITUDE:  79° 25.9' W ( -79.43170)


The primary bench mark is a disk located 25.45 m (83.5 ft) south of the SE
corner of a white house, 5.70 m (18.7 ft) west of the west face of a power pole
with a transformer, 3.35 m (11.0 ft) west of the centerline of the dirt road
leading to the gage site, and 0.52 m (1.7 ft)  NNE of a steel witness post with
a sign.  The bench mark is set at ground level, crimped to the top of a
stainless steel rod driven 5.5 m (18 ft) to refusal, and encased in a 5-inch PVC
pipe and concrete.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  2 of  5

                                                                                
Station ID: 8662216                         PUBLICATION DATE:  03/09/2004
Name:       CUMBERLAND, SAMPIT RIVER                          
            SC
NOAA Chart: 11532                           Latitude:   33° 22.2' N (  33.37000)
USGS Quad:  KILSOCK BAY                     Longitude:  79° 26.0' W ( -79.43330)


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


                         BENCH MARK STAMPING:  2216 A 1982
                         DESIGNATION:          866 2216 A TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         3909
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  DD1977
SETTING CLASSIFICATION:  Concrete monument                     OPUS PID:        
LATITUDE:   33° 22.2' N (  33.37000)          LONGITUDE:  79° 25.9' W ( -79.43170)


The bench mark is a disk set flush in a concrete monument at ground level, 21.88
m (71.8 ft) WNW of bench mark 2216 B 1982, 11.28 m (37.0 ft) west of the
centerline of the road leading to the gage site, 5.85 m (19.2 ft) SW of the SE
corner of the white house, and 5.18 m (17.0 ft) SE of the SW corner of the white
house.



                         BENCH MARK STAMPING:  2216 C 1982
                         DESIGNATION:          866 2216 C TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         3911
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  DD1975
SETTING CLASSIFICATION:  Concrete monument                     OPUS PID:        
LATITUDE:   33° 22.1' N (  33.36830)          LONGITUDE:  79° 25.9' W ( -79.43170)


The bench mark is a disk set flush in a concrete monument, 150 m (492 ft) south
of bench mark 2216 B 1982, 11.46 m (37.6 ft) NE of an unnumbered power pole,
5.70 m (18.7 ft) east of the centerline of a dirt road leading to the gage site,
1.01 m (3.3 ft) SSE of a metal witness post with a sign, 0.91 m (3.0 ft) NE of a
15 cm (0.5 ft) metal gate post,  and 0.15 m (0.5 ft) above ground level.  NOTE:
Mark not found in 1994 by US Power Squadron.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  3 of  5

                                                                                
Station ID: 8662216                         PUBLICATION DATE:  03/09/2004
Name:       CUMBERLAND, SAMPIT RIVER                          
            SC
NOAA Chart: 11532                           Latitude:   33° 22.2' N (  33.37000)
USGS Quad:  KILSOCK BAY                     Longitude:  79° 26.0' W ( -79.43330)


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


                         BENCH MARK STAMPING:  2216 D 1982
                         DESIGNATION:          866 2216 D TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         3912
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  DD1974
SETTING CLASSIFICATION:  Stainless steel rod                   OPUS PID:        
LATITUDE:   33° 22.0' N (  33.36670)          LONGITUDE:  79° 25.9' W ( -79.43170)


The bench mark is a disk located 171.8 m (563.5 ft) SSW of bench mark 2216 C
1982, 6.25 m (20.5 ft) SE of the centerline of a dirt road leading to the gage
site, 0.76 m (2.5 ft) NNE of an unnumbered power pole and 0.40 m (1.3 ft) SW of
a metal witness post and sign.  The bench mark is set at ground level, crimped
to the top of a stainless steel rod driven 7.3 m (24 ft) to refusal, and encased
in a 5-inch PVC pipe and concrete.



                         BENCH MARK STAMPING:  2216 E 1982
                         DESIGNATION:          866 2216 E TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         3913
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  DD1973
SETTING CLASSIFICATION:  Concrete monument                     OPUS PID:        
LATITUDE:   33° 22.0' N (  33.36670)          LONGITUDE:  79° 26.0' W ( -79.43330)


The bench mark is a disk set flush in a concrete monument, located 97.78 m
(320.8 ft) west of bench mark 2216 D 1982, 5.70 m (18.7 ft) NW of the centerline
of the dirt road leading to the gage site, 1.34 m (4.4 ft) west of the west face
of an unnumbered power pole, 0.70 m (2.3 ft) north of a metal witness post with
a sign, and 9 cm (0.3 ft) above ground level.

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

                                                                                
Station ID: 8662216                         PUBLICATION DATE:  03/09/2004
Name:       CUMBERLAND, SAMPIT RIVER                          
            SC
NOAA Chart: 11532                           Latitude:   33° 22.2' N (  33.37000)
USGS Quad:  KILSOCK BAY                     Longitude:  79° 26.0' W ( -79.43330)


                            T I D A L   D A T U M S 


Tidal datums at CUMBERLAND, SAMPIT RIVER based on:

     LENGTH OF SERIES:      5 MONTHS
     TIME PERIOD:           March 1982 - July 1982
     TIDAL EPOCH:           1983-2001
     CONTROL TIDE STATION:  8662746 WINYAH BAY, SOUTH ISLAND PLANTATION


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

     MEAN HIGHER HIGH WATER                     MHHW   =  1.338
     MEAN HIGH WATER                            MHW    =  1.268
     MEAN SEA LEVEL                             MSL    =  0.699
     MEAN TIDE LEVEL                            MTL    =  0.655
     North American Vertical Datum              NAVD88 =  0.645
     MEAN LOW WATER                             MLW    =  0.042
     MEAN LOWER LOW WATER                       MLLW   =  0.000

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     2216 B 1982                                 1.376    0.108
     2216 A 1982                                 1.579    0.311
     2216 C 1982                                 2.841    1.573
     2216 D 1982                                 5.502    4.234
     2216 E 1982                                 5.820    4.552


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

                                                                                
Station ID: 8662216                         PUBLICATION DATE:  03/09/2004
Name:       CUMBERLAND, SAMPIT RIVER                          
            SC
NOAA Chart: 11532                           Latitude:   33° 22.2' N (  33.37000)
USGS Quad:  KILSOCK BAY                     Longitude:  79° 26.0' W ( -79.43330)


                             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 8662216 CUMBERLAND, SAMPIT RIVER, SC

Revised: 08/08/2018
NOAA / National Ocean Service
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