Bench Mark Sheet for 8661582, DIVINES DOCK, MURRELLS INLET 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Superseded Epoch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Small blue map location marker Unpublished bench mark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: 8661582                         PUBLICATION DATE:  05/20/2004
Name:       DIVINE'S DOCK, MURRELLS INLET                     
            SC
NOAA Chart: 11535                           Latitude:   33° 32.5' N (  33.54170)
USGS Quad:  BROOKGREEN                      Longitude:  79°  1.7' W ( -79.02830)


To reach the tidal bench marks from the intersection of State Highway 707 and
U.S. Highway 17 in Murrells Inlet, proceed east on State Highway 707 for 0.6 km
(0.4 mi) to U.S. Highway 17 Business, then NE on U.S. Highway 17 Business for
2.7 km (1.7 mi) to State Road 51 (Atlantic Avenue), then turn right and proceed
SE on State Road 51 for 1.6 km (1.0 mi) to Waccamaw Drive, then turn right and
proceed SW on Waccamaw Drive for 4.3 km (2.7 mi) to State Road 597, then turn
right and proceed SW on State Road 597 for 0.8 km (0.5 mi) to the fourth house
from the end of the road.  The bench marks are along State Road 597.  The tide
gage and staff were on the dock behind the Divine residence.


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


                 PRIMARY BENCH MARK STAMPING:  D.D. NO. 3 1975
                         DESIGNATION:          866 1582 TIDAL DD 3

MONUMENTATION:           Tidal Station disk                    VM#:         3824
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  DD1512
SETTING CLASSIFICATION:  Copper clad steel rod                 OPUS PID:        
LATITUDE:   33° 32.4' N (  33.54000)          LONGITUDE:  79°  1.6' W ( -79.02670)


The primary bench mark is a disk set near a utility pole at the NW corner of a
chain link fence surrounding a two story wood house, 21.76 m (71.4 ft) WSW of
the west corner of a large two story house with detached garage, 20.24 m (66.4
ft) NNW of the NW corner of the two story house, 7 m (23 ft) ESE of the
centerline of State Road 597, 4 m (13 ft) SSW of a lone twin trunk cedar tree,
and 0.64 m (2.1 ft) NNE of utility pole #57744.  The bench mark is set level
with the ground, crimped to the top of a copper-clad steel rod driven 10.4 m (34
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: 8661582                         PUBLICATION DATE:  05/20/2004
Name:       DIVINE'S DOCK, MURRELLS INLET                     
            SC
NOAA Chart: 11535                           Latitude:   33° 32.5' N (  33.54170)
USGS Quad:  BROOKGREEN                      Longitude:  79°  1.7' W ( -79.02830)


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


                         BENCH MARK STAMPING:  D.D. NO. 4 1975
                         DESIGNATION:          866 1582 TIDAL DD 4

MONUMENTATION:           Tidal Station disk                    VM#:         3825
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  DD1511
SETTING CLASSIFICATION:  Copper clad steel rod                 OPUS PID:        
LATITUDE:   33° 32.5' N (  33.54170)          LONGITUDE:  79°  1.6' W ( -79.02670)


The bench mark is a disk set set near a utility pole at the intersection of
State Roads 597 and 601, 24.87 m (81.6 ft) NNE of the NE corner of a two story
house at the intersection, 24.75 m (81.2 ft) SE of the centerline of State Road
597, 7 m (23 ft) west of the centerline of State Road 601, and 0.79 m (2.6 ft)
SSE of utility pole #BCD1B.  The bench mark is set level with the ground,
crimped to the top of a copper-clad steel rod driven 10.1 m (33 ft) to refusal,
and encased in a 4-inch PVC pipe and concrete kickblock.



                         BENCH MARK STAMPING:  D.D. NO. 5 1975
                         DESIGNATION:          866 1582 TIDAL DD 5

MONUMENTATION:           Tidal Station disk                    VM#:         3826
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  DD1510
SETTING CLASSIFICATION:  Copper clad steel rod                 OPUS PID:        
LATITUDE:   33° 32.6' N (  33.54330)          LONGITUDE:  79°  1.6' W ( -79.02670)


The bench mark is a disk set near a utility pole in the north corner of the yard
of a two story house called MEVA, NE of bench mark D.D. NO. 4 1975, 14.81 m
(48.6 ft) NNE of the north corner of the house, 11.70 m (38.4 ft) WSW of the
west corner of the two story wood house called SEASHINE, 7.59 m (24.9 ft) SE of
the centerline of State Road 597, and 1.13 m (3.7 ft) NE of utility pole #AAB5. 
The bench mark is set level with the ground, crimped to the top of a copper-clad
steel rod driven 8.2 m (27 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: 8661582                         PUBLICATION DATE:  05/20/2004
Name:       DIVINE'S DOCK, MURRELLS INLET                     
            SC
NOAA Chart: 11535                           Latitude:   33° 32.5' N (  33.54170)
USGS Quad:  BROOKGREEN                      Longitude:  79°  1.7' W ( -79.02830)


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


                         BENCH MARK STAMPING:  1582 F 1982
                         DESIGNATION:          866 1582 F TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         3827
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  DD1509
SETTING CLASSIFICATION:  Stainless steel rod                   OPUS PID:        
LATITUDE:   33° 32.6' N (  33.54330)          LONGITUDE:  79°  1.5' W ( -79.02500)


The bench mark is a disk set near a utility pole in the south corner of the yard
of the yellow two story house #82 (Maribel Y. Macs residence), 16.61 m (54.5 ft)
east of the east corner of a two story wood and red brick house, 16.15 m (53.0
ft) SSE of the south corner of house #82, 5.79 m (19.0 ft) NW of the centerline
of State Road 597, and 0.82 m (2.7 ft) NE of utility pole #BC5B.  The bench mark
is set level with the ground, crimped to the top of a stainless steel rod driven
14.3 m (47 ft) to refusal, and encased in a 5-inch PVC pipe and concrete
kickblock.



                         BENCH MARK STAMPING:  1582 G 1982
                         DESIGNATION:          866 1582 G TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         3828
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  DD1504
SETTING CLASSIFICATION:  Stainless steel rod                   OPUS PID#: DD1504
LATITUDE:   33° 32.7' N (  33.54500)          LONGITUDE:  79°  1.4' W ( -79.02330)


The bench mark is a disk set near a utility pole in the NE angle of State Road
601, 27.31 m (89.6 ft) SW of the NW pylon of a three story wood house, 23.01 m
(75.5 ft) west of the SW corner of a gray wood house, 10.15 m (33.3 ft) NW of
the center of a manhole cover, 8.05 m (26.4 ft) NNE of the centerline of State
Road 597, 6.40 m (21.0 ft) ESE of the centerline of State Road 601, and 0.61 m
(2.0 ft) NW of utility pole #BC1B.  The bench mark is set level with the ground,
crimped to the top of a stainless steel rod driven 14.3 m (47 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: 8661582                         PUBLICATION DATE:  05/20/2004
Name:       DIVINE'S DOCK, MURRELLS INLET                     
            SC
NOAA Chart: 11535                           Latitude:   33° 32.5' N (  33.54170)
USGS Quad:  BROOKGREEN                      Longitude:  79°  1.7' W ( -79.02830)


                            T I D A L   D A T U M S 


Tidal datums at DIVINE'S DOCK, MURRELLS INLET based on:

     LENGTH OF SERIES:      8 MONTHS
     TIME PERIOD:           April 1975 - November 1975
     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   =  1.455
     MEAN HIGH WATER                            MHW    =  1.334
     North American Vertical Datum              NAVD88 =  0.820
     MEAN SEA LEVEL                             MSL    =  0.698
     MEAN TIDE LEVEL                            MTL    =  0.691
     MEAN LOW WATER                             MLW    =  0.048
     MEAN LOWER LOW WATER                       MLLW   =  0.000

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     D.D. NO. 3 1975                             2.536    1.202
     D.D. NO. 4 1975                             2.880    1.546
     D.D. NO. 5 1975                             2.965    1.631
     1582 F 1982                                 2.877    1.543
     1582 G 1982                                 2.799    1.465


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

                                                                                
Station ID: 8661582                         PUBLICATION DATE:  05/20/2004
Name:       DIVINE'S DOCK, MURRELLS INLET                     
            SC
NOAA Chart: 11535                           Latitude:   33° 32.5' N (  33.54170)
USGS Quad:  BROOKGREEN                      Longitude:  79°  1.7' W ( -79.02830)


                             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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