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Bench Mark Sheet for 8672875, Sunbury, Sunbury Channel GA

Superseded Epoch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Small blue map location marker Unpublished bench mark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: 8672875                         PUBLICATION DATE:  08/09/2012
Name:       SUNBURY, SUNBURY CH.,MEDWAY R.                    
            GA
NOAA Chart: 11511                           Latitude:   31° 46.0' N (  31.76670)
USGS Quad:  LIMERICK SE                     Longitude:  81° 16.7' W ( -81.27830)


To reach the tidal bench marks from the intersection of Interstate I-95 and
State Road 38, south of Savannah, Georgia.  Travel 16.1 km (10 mi) SE on State
Road 38 to the intersection of a unmarked county road.  Turn left (NE) and
proceed approximately 11.3 km (7 mi) to the town of Sunbury, on Sunbury Channel.
 The bench marks are on the property of Mr. W. Fillingame.  The tide gage and
staff were on the pier, south of the Morgan residence and SE of the Fillingame
residence.


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


                 PRIMARY BENCH MARK STAMPING:  SUNBURY 1933
                         DESIGNATION:          867 2875 SUNBURY 1933

MONUMENTATION:           Triangulation Station disk            VM#:         4751
AGENCY:                  US Coast and Geodetic Survey
                         (USC&GS)                              IDB PID#:  BR0546
SETTING CLASSIFICATION:  Concrete post                         OPUS PID:        
LATITUDE:   31° 46.0' N (  31.76731)          LONGITUDE:  81° 16.7' W ( -81.27869)


The bench mark is a disk set flush in top of a concrete post projecting 0.1 m
(0.3 ft) above ground level, in the backyard of the W. Fillingame residence, 49
m (160 ft) NW of Bench Mark NO 1, 46 m (150 ft) north of Bench Mark Sunbury NO 1
1933, 30 m (99 ft) SE of the SE corner of the Fillingame residence (a 2 storied
frame house), 16 m (52 ft) west of the shoreline 6 m (21 ft) NW of SW corner of
south brick pillar of first brick wall, east of the house, and 4 m (12 ft) west
of brick wall.

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

                                                                                
Station ID: 8672875                         PUBLICATION DATE:  08/09/2012
Name:       SUNBURY, SUNBURY CH.,MEDWAY R.                    
            GA
NOAA Chart: 11511                           Latitude:   31° 46.0' N (  31.76670)
USGS Quad:  LIMERICK SE                     Longitude:  81° 16.7' W ( -81.27830)


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


                         BENCH MARK STAMPING:  SUNBURY NO 1 1933
                         DESIGNATION:          867 2875 SUNBURY 1 1933

MONUMENTATION:           Reference Mark disk                   VM#:         4752
AGENCY:                  US Coast and Geodetic Survey
                         (USC&GS)                              IDB PID#:  BR0544
SETTING CLASSIFICATION:  Concrete post                         OPUS PID:        
LATITUDE:   31° 46.0' N (  31.76686)          LONGITUDE:  81° 16.7' W ( -81.27867)


The bench mark is a disk set flush in top of a concrete post projecting 0.06 m
(0.2 ft) above ground level, in the backyard of the W. Fillingame residence, 76
m (249 ft) SE of the SE corner of the Fillingame residence, 46 m (150 ft) south
of Bench Mark NO 1, 6 m (20 ft) NW of a large cedar tree, 2 m (8 ft) SE of the
NE corner of a brick pump house, 2.29 m (7.5 ft) NE of the SE corner of the pump
house.



                         BENCH MARK STAMPING:  2875 F 2011
                         DESIGNATION:          867 2875 F

MONUMENTATION:           See descriptive text                  VM#:        20386
AGENCY:                                                        IDB PID:         
SETTING CLASSIFICATION:  see text                              OPUS PID:        
LATITUDE:   31° 45.9' N (  31.76458)          LONGITUDE:  81° 16.9' W ( -81.28231)


The bench mark is a metal rod located 12.1 km (7.5 mi) ESE of Dorchester, 11.4
km (7.1 mi) SSW of Oak Leve, 5.0 km (3.1 mi) ENE of Seabrook, 40.6 m (133.2 ft)
east of utility pole numbered 309, 36.5 m (119.8 ft) SSE of a gazebo, 15.8 m
(51.8 ft) NE of a do not enter sign, 5.5 m (18.0 ft) N of the centerline of Fort
Morris Road, 0.7 m (2.3 ft) south of utility pole numbered 619.  The bench mark
is recessed 0.2 m (0.7 ft), being the top of a stainless steel rod driven 12 m
(39.3 ft) to refusal, and encased in a 5-inch logo cap.  

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

                                                                                
Station ID: 8672875                         PUBLICATION DATE:  08/09/2012
Name:       SUNBURY, SUNBURY CH.,MEDWAY R.                    
            GA
NOAA Chart: 11511                           Latitude:   31° 46.0' N (  31.76670)
USGS Quad:  LIMERICK SE                     Longitude:  81° 16.7' W ( -81.27830)


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


                         BENCH MARK STAMPING:  2875 G 2011
                         DESIGNATION:          2875 G 2011

MONUMENTATION:           See descriptive text                  VM#:        20387
AGENCY:                                                        IDB PID:         
SETTING CLASSIFICATION:  see text                              OPUS PID:        
LATITUDE:   31° 45.9' N (  31.76553)          LONGITUDE:  81° 16.9' W ( -81.28214)


The bench mark is a metal rod located 12.1 km (7.5 mi) ESE of Dorchester, 11.3
km (7.0 mi) SSW of Oak Leve, 5.1 km (3.2 mi) ENE of Seabrook, 47.2 m (154.9 ft)
ESE of the shoreline of a pond, 27.1 m (88.9 ft) WNW of a 15 mph speed limit
sign, 19.5 m (64.0 ft) WNW of utility pole numbered 1292, 7.8 m (25.6 ft) W of
the centerline of brigantine dunmore road, 0.5 m (1.6 ft) ESE of a utility pole.
 The bench mark is recessed 0.2 m (0.7 ft), being the top of a stainless steel
rod driven 20 m (65.6 ft) to refusal, and encased in a 5-inch Logo cap.  



                         BENCH MARK STAMPING:  2875 H 2011
                         DESIGNATION:          2875 H 2011

MONUMENTATION:           See descriptive text                  VM#:        20388
AGENCY:                                                        IDB PID:         
SETTING CLASSIFICATION:  see text                              OPUS PID:        
LATITUDE:   31° 45.9' N (  31.76442)          LONGITUDE:  81° 16.7' W ( -81.27861)


The bench mark is a disk located 12.5 km (7.8 mi) ESE of Dorchester, 11.3 km
(7.0 mi) SSW of Oak Leve, 5.3 km (3.3 mi) ENE of Seabrook, 14.9 m (48.9 ft)
north of utility pole numbered 50, 8.8 m (28.9 ft) north of the centerline of a
boat ramp, 4.2 m (13.8 ft) E of the centerline of the road turnaround, 1.4 m
(4.6 ft) S of the Centerline of the dock walkway entrance, 00.2 m (0.7 ft) E of
the eastern edge of the sidewalk.  The bench mark is a disk set flush on top of
base for concrete dock 0.3 m (1.0 ft) above the ground.  

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

                                                                                
Station ID: 8672875                         PUBLICATION DATE:  08/09/2012
Name:       SUNBURY, SUNBURY CH.,MEDWAY R.                    
            GA
NOAA Chart: 11511                           Latitude:   31° 46.0' N (  31.76670)
USGS Quad:  LIMERICK SE                     Longitude:  81° 16.7' W ( -81.27830)


                            T I D A L   D A T U M S 


Tidal datums at SUNBURY, SUNBURY CH.,MEDWAY R. based on:

     LENGTH OF SERIES:      3 MONTHS
     TIME PERIOD:           February 2012 - April 2012
     TIDAL EPOCH:           1983-2001
     CONTROL TIDE STATION:  8670870 FORT PULASKI, SAVANNAH RIVER


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

     MEAN HIGHER HIGH WATER                     MHHW   =  2.396
     MEAN HIGH WATER                            MHW    =  2.289
     MEAN SEA LEVEL                             MSL    =  1.294
     MEAN TIDE LEVEL                            MTL    =  1.179
     MEAN LOW WATER                             MLW    =  0.068
     MEAN LOWER LOW WATER                       MLLW   =  0.000

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     SUNBURY 1933                                7.392    5.103
     SUNBURY NO 1 1933                           6.970    4.681
     2875 F 2011                                 8.106    5.817
     2875 G 2011                                 7.861    5.572
     2875 H 2011                                 3.199    0.910


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

                                                                                
Station ID: 8672875                         PUBLICATION DATE:  08/09/2012
Name:       SUNBURY, SUNBURY CH.,MEDWAY R.                    
            GA
NOAA Chart: 11511                           Latitude:   31° 46.0' N (  31.76670)
USGS Quad:  LIMERICK SE                     Longitude:  81° 16.7' W ( -81.27830)


                             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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Products available at 8672875 Sunbury, Sunbury Channel, GA

Revised: 10/15/2013
NOAA / National Ocean Service
Web site owner: Center for Operational Oceanographic Products and Services