Bench Mark Sheet for 8533987, WEST CREEK, WESTECUNK CREEK NJ

Superseded Epoch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Small blue map location marker Unpublished bench mark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  6

                                                                                
Station ID: 8533987                         PUBLICATION DATE:  06/16/2004
Name:       WEST CREEK, WESTECUNK CREEK                       
            NJ
NOAA Chart: 12324                           Latitude:   39° 37.9' N (  39.63170)
USGS Quad:  WEST CREEK                      Longitude:  74° 17.8' W ( -74.29670)


To reach the tidal bench marks in West Creek proceed 1.05 km (0.65 mi) SE along
Westecunk Creek Dock Road from the intersection of Westecunk Creek Dock Road and
U.S. Highway 9 to Westecunk Creek.  The bench marks are along Westecunk Creek
Dock Road.  The tide gage and staff were located on a sea wall at No. 133 Dock
Road.


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


                 PRIMARY BENCH MARK STAMPING:  3987 A 1976
                         DESIGNATION:          853 3987 A TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         2605
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:        
SETTING CLASSIFICATION:  Copper clad steel rod                 OPUS PID:        
LATITUDE:   39° 37.9' N (  39.63170)          LONGITUDE:  74° 17.8' W ( -74.29670)


The primary bench mark is a disk located 57.06 m (187.2 ft) west of the NW
corner of a one-story block garage south of a dwelling at 133 Dock Road, 24 m
(79 ft) south of the bulkhead on the SW side of Westecunk Creek, 8.99 m (29.5
ft) NE of the centerline of Dock Road, and 1.28 m (4.2 ft) SE of utility pole
No. P39876.  The bench mark is set 6 cm (0.2 ft) below ground level, crimped to
the top of a copper-coated steel rod driven 9.8 m (32 ft) to refusal, and
encased in a PVC pipe and concrete kickblock.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  2 of  6

                                                                                
Station ID: 8533987                         PUBLICATION DATE:  06/16/2004
Name:       WEST CREEK, WESTECUNK CREEK                       
            NJ
NOAA Chart: 12324                           Latitude:   39° 37.9' N (  39.63170)
USGS Quad:  WEST CREEK                      Longitude:  74° 17.8' W ( -74.29670)


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


                         BENCH MARK STAMPING:  3987 B 1976
                         DESIGNATION:          853 3987 B TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         2606
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:        
SETTING CLASSIFICATION:  Copper clad steel rod                 OPUS PID:        
LATITUDE:   39° 37.9' N (  39.63170)          LONGITUDE:  74° 17.8' W ( -74.29670)


The bench mark is a disk located 0.3 km (0.2 mi) NW of bench mark 3987 A 1976,
8.32 m (27.3 ft) south of the centerline of Dock Road, and 1.01 m (3.3 ft) NW of
utility pole No. P10130.  The bench mark is set 6 cm (0.2 ft) below ground
level, crimped to the top of a copper-coated steel rod driven 9.4 m (31 ft) to
refusal, and encased in a PVC pipe and concrete kickblock.



                         BENCH MARK STAMPING:  3987 C 1977
                         DESIGNATION:          853 3987 C TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         2607
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:        
SETTING CLASSIFICATION:  Concrete abutment                     OPUS PID:        
LATITUDE:   39° 37.9' N (  39.63170)          LONGITUDE:  74° 17.8' W ( -74.29670)


The bench mark is a disk at West Creek, set in the top of the north end of the
west concrete abutment of the U.S. Highway 9 bridge over Westecunk Creek, 31.76
m (104.2 ft) NW of utility pole No. 6435, 16.86 m (55.3 ft) west of utility pole
No. 6436, and 4.36 m (14.3 ft) NW of a catch basin on the west side of U.S.
Highway 9.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  3 of  6

                                                                                
Station ID: 8533987                         PUBLICATION DATE:  06/16/2004
Name:       WEST CREEK, WESTECUNK CREEK                       
            NJ
NOAA Chart: 12324                           Latitude:   39° 37.9' N (  39.63170)
USGS Quad:  WEST CREEK                      Longitude:  74° 17.8' W ( -74.29670)


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


                         BENCH MARK STAMPING:  B 55 1961
                         DESIGNATION:          B 55

MONUMENTATION:           Bench Mark disk                       VM#:         2608
AGENCY:                  US Coast & Geodetic Survey
                         (USC&GS)                                 IDB PID#:  JU0125
SETTING CLASSIFICATION:  Concrete monument                     OPUS PID#: JU0125
LATITUDE:   39° 37.9' N (  39.63170)          LONGITUDE:  74° 17.8' W ( -74.29670)


The bench mark is a disk located 1.05 km (0.65 mi) SE on Westecunk Creek Dock
Road from the intersection with U.S. Highway 9 in West Creek, 9.75 m (32.0 ft)
NW of the centerline of a driveway leading to Creston Court, 9 m (30 ft) SW of
the centerline of Westecunk Creek Dock Road, 1.98 m (6.5 ft) NW of a cable line
pole, 0.30 m (1.0 ft) below road surface, and set into the top of a concrete
post.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  4 of  6

                                                                                
Station ID: 8533987                         PUBLICATION DATE:  06/16/2004
Name:       WEST CREEK, WESTECUNK CREEK                       
            NJ
NOAA Chart: 12324                           Latitude:   39° 37.9' N (  39.63170)
USGS Quad:  WEST CREEK                      Longitude:  74° 17.8' W ( -74.29670)


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


                         BENCH MARK STAMPING:  J 67 1964
                         DESIGNATION:          J 67

MONUMENTATION:           Bench Mark disk                       VM#:         2609
AGENCY:                  US Coast & Geodetic Survey
                         (USC&GS)                                 IDB PID#:  JU0089
SETTING CLASSIFICATION:  Copper clad steel rod                 OPUS PID:        
LATITUDE:   39° 38.0' N (  39.63330)          LONGITUDE:  74° 18.6' W ( -74.31000)


The bench mark is a disk located 0.2 km (0.1 mi) SW along U.S. Highway 9 from
the Post Office at West Creek, and 0.1 km (0.05 mi) NW along Thomas Avenue, near
the east corner of a cemetery, 8.53 m (28.0 ft) SW of the centerline of Thomas
Avenue, and 0.30 m (1.0 ft) NE of the brick wall along the NE side of the
cemetery.  The bench mark is set at ground level, crimped to the top of a
copper-coated steel rod driven 29.2 m (96 ft), and encased in an 8-inch
protector tile.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  5 of  6

                                                                                
Station ID: 8533987                         PUBLICATION DATE:  06/16/2004
Name:       WEST CREEK, WESTECUNK CREEK                       
            NJ
NOAA Chart: 12324                           Latitude:   39° 37.9' N (  39.63170)
USGS Quad:  WEST CREEK                      Longitude:  74° 17.8' W ( -74.29670)


                            T I D A L   D A T U M S 


Tidal datums at WEST CREEK, WESTECUNK CREEK based on:

     LENGTH OF SERIES:      9 MONTHS
     TIME PERIOD:           March 1977 - November 1977
     TIDAL EPOCH:           1983-2001
     CONTROL TIDE STATION:  8557380 LEWES, FT. MILES


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

     MEAN HIGHER HIGH WATER                     MHHW   =  0.742
     MEAN HIGH WATER                            MHW    =  0.661
     MEAN TIDE LEVEL                            MTL    =  0.344
     North American Vertical Datum              NAVD88 =  0.344
     MEAN SEA LEVEL                             MSL    =  0.340
     MEAN LOW WATER                             MLW    =  0.027
     MEAN LOWER LOW WATER                       MLLW   =  0.000

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     3987 A 1976                                 1.220    0.559
     3987 B 1976                                 0.943    0.282
     3987 C 1977                                 2.868    2.207
     B 55 1961                                   1.368    0.707
     J 67 1964                                   8.447    7.786


                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  6 of  6

                                                                                
Station ID: 8533987                         PUBLICATION DATE:  06/16/2004
Name:       WEST CREEK, WESTECUNK CREEK                       
            NJ
NOAA Chart: 12324                           Latitude:   39° 37.9' N (  39.63170)
USGS Quad:  WEST CREEK                      Longitude:  74° 17.8' W ( -74.29670)


                             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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