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Bench Mark Sheet for 8663461, CASINO CREEK 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Superseded Epoch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Small blue map location marker Unpublished bench mark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: 8663461                         PUBLICATION DATE:  03/09/2004
Name:       CASINO CREEK                                      
            SC
NOAA Chart: 11531                           Latitude:   33°  6.5' N (  33.10830)
USGS Quad:  MCCLELLANVILLE                  Longitude:  79° 23.6' W ( -79.39330)


To reach the tidal bench marks from the boat landing in McClellanville, proceed
by boat from Jeremy Creek to the Intracoastal Waterway at day marker #35, then
go NE on the Intracoastal Waterway for about 7.2 km (4.5 statute mi) to day
marker #29.  The tidal bench marks are on the NE end of the island, at the
junction of Casino Creek and the Intracoastal Waterway at day marker #29.  The
tide gage and staff were on day marker #29.


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


                 PRIMARY BENCH MARK STAMPING:  3461 A 1977
                         DESIGNATION:          866 3461 A

MONUMENTATION:           Tidal Station disk                    VM#:         3982
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:        
SETTING CLASSIFICATION:  Copper clad steel rod                 OPUS PID:        
LATITUDE:   33°  6.5' N (  33.10830)          LONGITUDE:  79° 23.6' W ( -79.39330)


The primary bench mark is a disk located 26.97 m (88.5 ft) NE of bench mark 3461
G 1982, 18.90 m (62.0 ft) east of bench mark 3461 C 1977, 9.57 m (31.4 ft) NNE
of a 1 m (2 ft) diameter pine tree, and 0.49 m (1.6 ft) NW of a witness post
with sign.  The bench mark is set at grade level, crimped to the top of a
copper-clad steel rod driven 6.7 m (22 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: 8663461                         PUBLICATION DATE:  03/09/2004
Name:       CASINO CREEK                                      
            SC
NOAA Chart: 11531                           Latitude:   33°  6.5' N (  33.10830)
USGS Quad:  MCCLELLANVILLE                  Longitude:  79° 23.6' W ( -79.39330)


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


                         BENCH MARK STAMPING:  3461 C 1977
                         DESIGNATION:          866 3461 C

MONUMENTATION:           Tidal Station disk                    VM#:         3983
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:        
SETTING CLASSIFICATION:  Copper clad steel rod                 OPUS PID:        
LATITUDE:   33°  6.5' N (  33.10830)          LONGITUDE:  79° 23.6' W ( -79.39330)


The bench mark is a disk located 19.23 m (63.1 ft) NNW of bench mark 3461 G
1982, 6.31 m (20.7 ft) north of a 0.61 m (2.0 ft) diameter pine tree, 5.21 m
(17.1 ft) south of a 15 cm (0.5 ft) diameter cedar tree, and 0.49 m (1.6 ft) NNE
of a witness post with sign.  The bench mark is set at grade level, 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.



                         BENCH MARK STAMPING:  3461 E 1977
                         DESIGNATION:          866 3461 E

MONUMENTATION:           Tidal Station disk                    VM#:         3984
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:        
SETTING CLASSIFICATION:  Copper clad steel rod                 OPUS PID:        
LATITUDE:   33°  6.5' N (  33.10830)          LONGITUDE:  79° 23.6' W ( -79.39330)


The bench mark is a disk located 13.29 m (43.6 ft) west of a multibase cluster
of pine trees, 11.61 m (38.1 ft) south of a 0.46 m (1.5 ft) diameter pine tree,
9.05 m (29.7 ft) east of a 0.61 m (2.0 ft) diameter multibase cluster of cedar
trees, and 0.34 m (1.1 ft) north of a witness post with sign.  The bench mark is
set at grade level, 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  3 of  5

                                                                                
Station ID: 8663461                         PUBLICATION DATE:  03/09/2004
Name:       CASINO CREEK                                      
            SC
NOAA Chart: 11531                           Latitude:   33°  6.5' N (  33.10830)
USGS Quad:  MCCLELLANVILLE                  Longitude:  79° 23.6' W ( -79.39330)


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


                         BENCH MARK STAMPING:  3461 F 1982
                         DESIGNATION:          866 3461 F

MONUMENTATION:           Tidal Station disk                    VM#:         3985
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:        
SETTING CLASSIFICATION:  Stainless steel rod                   OPUS PID:        
LATITUDE:   33°  6.5' N (  33.10830)          LONGITUDE:  79° 23.6' W ( -79.39330)


The bench mark is a disk located 21.58 m (70.8 ft) SE of bench mark 3461 C 1977,
12.92 m (42.4 ft) east of bench mark 3461 G 1982, 10.67 m (35.0 ft) south of a
0.61 m (2.0 ft) diameter pine tree, 5.94 m (19.5 ft) east of a 0.40 m (1.3 ft)
diameter pine tree, and 0.40 m (1.3 ft) NW of a witness post with sign.  The
bench mark is set at grade level, crimped to the top of a stainless steel rod
driven 9.8 m (32 ft) to refusal, and encased in a 5-inch PVC pipe and concrete
kickblock.



                         BENCH MARK STAMPING:  3461 G 1982
                         DESIGNATION:          866 3461 G

MONUMENTATION:           Tidal Station disk                    VM#:         3986
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:        
SETTING CLASSIFICATION:  Stainless steel rod                   OPUS PID:        
LATITUDE:   33°  6.5' N (  33.10830)          LONGITUDE:  79° 23.6' W ( -79.39330)


The bench mark is a disk located 14.0 m (46.0 ft) NNE of bench mark 3461 E 1977,
8.23 m (27.0 ft) NW of a multibase cluster of pine trees, 6.55 m (21.5 ft) east
of a 0.46 m (1.5 ft) diameter pine tree, 1.28 m (4.2 ft) WSW of a 0.40 m (1.3
ft) diameter pine tree, and 0.3 m (1.0 ft) north of a witness post with sign. 
The bench mark is set at grade level, crimped to the top of a stainless steel
rod driven 11.0 m (36 ft) to refusal, and encased in a 5-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: 8663461                         PUBLICATION DATE:  03/09/2004
Name:       CASINO CREEK                                      
            SC
NOAA Chart: 11531                           Latitude:   33°  6.5' N (  33.10830)
USGS Quad:  MCCLELLANVILLE                  Longitude:  79° 23.6' W ( -79.39330)


                            T I D A L   D A T U M S 


Tidal datums at CASINO CREEK based on:

     LENGTH OF SERIES:      3 MONTHS
     TIME PERIOD:           June 1978 - August 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:

     MEAN HIGHER HIGH WATER                     MHHW   =  1.540
     MEAN HIGH WATER                            MHW    =  1.433
     MEAN SEA LEVEL                             MSL    =  0.748
     MEAN TIDE LEVEL                            MTL    =  0.739
     MEAN LOW WATER                             MLW    =  0.046
     MEAN LOWER LOW WATER                       MLLW   =  0.000

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     3461 A 1977                                 1.744    0.311
     3461 C 1977                                 2.430    0.997
     3461 E 1977                                 2.160    0.727
     3461 F 1982                                 2.212    0.779
     3461 G 1982                                 2.832    1.399


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

                                                                                
Station ID: 8663461                         PUBLICATION DATE:  03/09/2004
Name:       CASINO CREEK                                      
            SC
NOAA Chart: 11531                           Latitude:   33°  6.5' N (  33.10830)
USGS Quad:  MCCLELLANVILLE                  Longitude:  79° 23.6' W ( -79.39330)


                             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 8663461 CASINO CREEK, SC

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