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Bench Mark Sheet for 8666131, LOWER TOOGOODOO 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Superseded Epoch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Small blue map location marker Unpublished bench mark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: 8666131                         PUBLICATION DATE:  03/09/2004
Name:       LOWER TOOGOODOO CREEK                             
            SC
NOAA Chart: 11522                           Latitude:   32° 42.2' N (  32.70330)
USGS Quad:  ADAMS RUN                       Longitude:  80° 16.7' W ( -80.27830)


To reach the tidal bench marks from intersection of S.C. Highway 162 and S.C.
Highway 165 (Toogoodoo Road) in Hollywood, South Carolina, proceed SW on Highway
165 for 1.4 km (0.9 mi) to a Y, then bear right and continue SW on Toogoodoo
Road for 3.7 km (2.3 mi), then turn left and proceed south on Summit Road for
1.1 km (0.7 mi), to the intersection with another dirt road, then turn left and
proceed 0.3 km (0.2 mi) to the gage site.  The bench marks are located in the
vicinity of the Wilson residence.  The tide gage and staff were located on a
temporary pier erected behind the Wilson residence, upstream from boat dock.


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


                 PRIMARY BENCH MARK STAMPING:  6131 A 1977
                         DESIGNATION:          866 6131 A TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         4263
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  CK2467
SETTING CLASSIFICATION:  Galvanized steel rod                  OPUS PID:        
LATITUDE:   32° 42.2' N (  32.70330)          LONGITUDE:  80° 16.7' W ( -80.27830)


The primary bench mark is a disk located east of Wilson residence near edge of
creek, 22.62 m (74.2 ft) east of east side of Wilsons brick chimney, 5.79 m
(19.0 ft) west of river bank, 4.82 m (15.8 ft) WSW of top step of dock, 3 m (10
ft) SE of 15 cm (0.5 ft) diameter mognolia tree, 1.83 m (6.0 ft) north of Old
Tabby Foundation.  The bench mark is set at ground level, crimped to the top of
a galvanized steel rod driven 8.5 m (28 ft) to refusal, 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: 8666131                         PUBLICATION DATE:  03/09/2004
Name:       LOWER TOOGOODOO CREEK                             
            SC
NOAA Chart: 11522                           Latitude:   32° 42.2' N (  32.70330)
USGS Quad:  ADAMS RUN                       Longitude:  80° 16.7' W ( -80.27830)


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


                         BENCH MARK STAMPING:  6131 C 1977
                         DESIGNATION:          866 6131 C TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         4265
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  CK2465
SETTING CLASSIFICATION:  Galvanized steel rod                  OPUS PID:        
LATITUDE:   32° 42.2' N (  32.70330)          LONGITUDE:  80° 16.7' W ( -80.27830)


The bench mark is a disk located behind Wilson residence near a wooden fence and
power pole, 13.78 m (45.2 ft) SW of southern corner of small wooden shed, 10.27
m (33.7 ft) SE of 1.22 m (4.0 ft) diameter pecan tree, 3.72 m (12.2 ft) west of
metal anchor supporting the guy wire to power pole #95909, 2.26 m (7.4 ft) SSW
of power pole #95909, and 1.98 m (6.5 ft) north of 0.46 m (1.5 ft) diameter pine
tree.  The bench mark is set at ground level, crimped to the top of a galvanized
steel rod driven 10.7 m (35 ft) to refusal, encased in a 4-inch PVC pipe and
concrete kickblock.



                         BENCH MARK STAMPING:  6131 D 1977
                         DESIGNATION:          866 6131 D TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         4266
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  CK2468
SETTING CLASSIFICATION:  Galvanized steel rod                  OPUS PID:        
LATITUDE:   32° 42.2' N (  32.70330)          LONGITUDE:  80° 16.7' W ( -80.27830)


The bench mark is a disk located south of Wilson residence near railway and the
edge of marsh, 10.36 m (34.0 ft) north of triple trunked live oak tree, 6 m (20
ft) south of 0.91 m (3 ft) diameter twin live oak tree, and 2.56 m (8.4 ft) west
of railway used to pull boats up from the river.  The bench mark is set at
ground level, crimped to the top of a galvanized steel rod driven 6.4 m (21 ft)
to refusal, encased in 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: 8666131                         PUBLICATION DATE:  03/09/2004
Name:       LOWER TOOGOODOO CREEK                             
            SC
NOAA Chart: 11522                           Latitude:   32° 42.2' N (  32.70330)
USGS Quad:  ADAMS RUN                       Longitude:  80° 16.7' W ( -80.27830)


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


                         BENCH MARK STAMPING:  6131 F 1983
                         DESIGNATION:          866 6131 F TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:        17298
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  CK2466
SETTING CLASSIFICATION:  Concrete monument                     OPUS PID:        
LATITUDE:   32° 42.2' N (  32.70330)          LONGITUDE:  80° 16.7' W ( -80.27830)


The bench mark is set in the top of a 0.4 m (1.3 ft) diameter concrete post,
50.60 m (166.0 ft) ESE of the southern corner of a one story house, 5.79 m (19.0
ft) WNW of the approximate center of the entrance ramp leading to the dock, 5.18
m (17.0 ft) ENE of the southernmost of two 1.52 m (5.0 ft) diameter pine trees,
3.7 m (12.0 ft) SW of the approximate edge of the creek bank, and set at ground
level.



                         BENCH MARK STAMPING:  6131 G 1983
                         DESIGNATION:          866 6131 G TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:        17299
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  CK2464
SETTING CLASSIFICATION:  Concrete monument                     OPUS PID:        
LATITUDE:   32° 42.2' N (  32.70330)          LONGITUDE:  80° 16.7' W ( -80.27830)


The bench mark is set in the top of a concrete post, set in the vicinity of a
power pole just east of the dirt road alongside the NE corner of the fenced in
pasture, 16.61 m (54.5 ft) NE of the approximate center of the dirt road leading
to the house and gage site, 8.66 m (28.4 ft) ESE of the barbed wire fence, 5.58
m (18.3 ft) WNW of power pole # 217789 with a witness sign attached, and set at
ground level.

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

                                                                                
Station ID: 8666131                         PUBLICATION DATE:  03/09/2004
Name:       LOWER TOOGOODOO CREEK                             
            SC
NOAA Chart: 11522                           Latitude:   32° 42.2' N (  32.70330)
USGS Quad:  ADAMS RUN                       Longitude:  80° 16.7' W ( -80.27830)


                            T I D A L   D A T U M S 


Tidal datums at LOWER TOOGOODOO CREEK based on:

     LENGTH OF SERIES:      3 MONTHS
     TIME PERIOD:           April 1978 - June 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   =  2.232
     MEAN HIGH WATER                            MHW    =  2.124
     MEAN SEA LEVEL                             MSL    =  1.296
     North American Vertical Datum              NAVD88 =  1.290
     MEAN TIDE LEVEL                            MTL    =  1.099
     MEAN LOW WATER                             MLW    =  0.074
     MEAN LOWER LOW WATER                       MLLW   =  0.000

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     6131 A 1977                                 4.627    2.503
     6131 C 1977                                 4.819    2.695
     6131 D 1977                                 2.582    0.458
     6131 F 1983                                 3.635    1.511
     6131 G 1983                                 5.289    3.165


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

                                                                                
Station ID: 8666131                         PUBLICATION DATE:  03/09/2004
Name:       LOWER TOOGOODOO CREEK                             
            SC
NOAA Chart: 11522                           Latitude:   32° 42.2' N (  32.70330)
USGS Quad:  ADAMS RUN                       Longitude:  80° 16.7' W ( -80.27830)


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