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Bench Mark Sheet for 8535001, CEDAR SWAMP, TUCKAHOE RIVER 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Superseded Epoch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Small blue map location marker Unpublished bench mark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  5

                                                                                
Station ID: 8535001                         PUBLICATION DATE:  06/16/2004
Name:       CEDAR SWAMP, TUCKAHOE RIVER                       
            NJ
NOAA Chart: 12318                           Latitude:   39° 14.8' N (  39.24670)
USGS Quad:  MARMORA                         Longitude:  74° 43.1' W ( -74.71830)


To reach the tidal bench marks from the intersection of State Highway 585
(Dennisvillle Petersburg Road) and State Highway 50 in Petersburg, proceed 1.3
km (0.8 mi) ESE along State Highway 50 to the SW abutment of the bridge over
Cedar Swamp Creek.  The bench marks are along State Highway 50.  The tide gage
and staff were on a platform attached to the bridge over Cedar Swamp.


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


                 PRIMARY BENCH MARK STAMPING:  5001 A 1978
                         DESIGNATION:          853 5001 A TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         2745
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:        
SETTING CLASSIFICATION:  Concrete abutment                     OPUS PID#: BBDC43
LATITUDE:   39° 14.8' N (  39.24670)          LONGITUDE:  74° 43.1' W ( -74.71830)


The primary bench mark is a disk set flush in the top of the concrete abutment,
51 m (168 ft) south of bench mark 5001 C 1978, 7.07 m (23.2 ft) SW of the
centerline of State Highway 50, 0.91 m (3.0 ft) SW of the concrete curb, and
0.34 m (1.1 ft) NE of the SW face of the abutment.

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

                                                                                
Station ID: 8535001                         PUBLICATION DATE:  06/16/2004
Name:       CEDAR SWAMP, TUCKAHOE RIVER                       
            NJ
NOAA Chart: 12318                           Latitude:   39° 14.8' N (  39.24670)
USGS Quad:  MARMORA                         Longitude:  74° 43.1' W ( -74.71830)


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


                         BENCH MARK STAMPING:  5001 B 1978
                         DESIGNATION:          853 5001 B TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         2746
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:        
SETTING CLASSIFICATION:  Concrete footing                      OPUS PID:        
LATITUDE:   39° 14.8' N (  39.24670)          LONGITUDE:  74° 43.1' W ( -74.71830)


The bench mark is a disk set flush in the top of a concrete footing for an old
building on the east side of the Penn Reading Seashore Line railroad tracks, 84
m (275 ft) SE of bench mark 5001 A 1978, 11.31 m (37.1 ft) NW of a wood utility
pole, 3 m (10 ft) south of the westernmost corner of the concrete footing, 2.29
m (7.5 ft) NE of the east rail of the railroad track, and 0.85 m (2.8 ft) west
of the mid SE corner of the footing.



                         BENCH MARK STAMPING:  5001 C 1978
                         DESIGNATION:          853 5001 C TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         2747
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:        
SETTING CLASSIFICATION:  Concrete abutment                     OPUS PID:        
LATITUDE:   39° 14.8' N (  39.24670)          LONGITUDE:  74° 43.1' W ( -74.71830)


The bench mark is a disk set flush in the top of the NE concrete abutment for
the bridge over Cedar Swamp Creek, 62 m (204 ft) SE of bench mark 5001 D 1978,
7.10 m (23.3 ft) NE of the centerline of State Highway 50, 0.91 m (3.0 ft) NE of
the concrete curb, and 0.34 m (1.1 ft) SE of the NE face of the abutment.

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

                                                                                
Station ID: 8535001                         PUBLICATION DATE:  06/16/2004
Name:       CEDAR SWAMP, TUCKAHOE RIVER                       
            NJ
NOAA Chart: 12318                           Latitude:   39° 14.8' N (  39.24670)
USGS Quad:  MARMORA                         Longitude:  74° 43.1' W ( -74.71830)


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


                         BENCH MARK STAMPING:  5001 D 1978
                         DESIGNATION:          853 5001 D TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         2748
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:        
SETTING CLASSIFICATION:  Galvanized steel rod                  OPUS PID:        
LATITUDE:   39° 14.8' N (  39.24670)          LONGITUDE:  74° 43.1' W ( -74.71830)


The bench mark is a disk located 24.69 m (81.0 ft) SE of a wood utility pole,
14.81 m (48.6 ft) west of wood utility pole #177, 7.68 m (25.2 ft) SW of the
centerline of State Highway 50, 2.29 m (7.5 ft) west of the SE end of a steel
guard rail, and 1.19 m (3.9 ft) SW of a steel guard rail.  The bench mark is set
6 cm (0.2 ft) below ground level, crimped to the top of a galvanized steel rod
driven 15.2 m (50 ft) to refusal, and encased in a PVC pipe and concrete
kickblock.



                         BENCH MARK STAMPING:  5001 E 1978
                         DESIGNATION:          853 5001 E TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         2749
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:        
SETTING CLASSIFICATION:  Galvanized steel rod                  OPUS PID:        
LATITUDE:   39° 14.8' N (  39.24670)          LONGITUDE:  74° 43.1' W ( -74.71830)


The bench mark is a disk located 102 m (336 ft) NW of bench mark 5001 D 1978, 7
m (23 ft) SW of the centerline of State Highway 50, 5.49 m (18.0 ft) north of a
6 cm (0.2 ft) diameter cedar tree, 1.16 m (3.8 ft) west of a steel sign reading
"Bridge May Be Slippery," and 0.58 m (1.9 ft) SW of a steel guard rail.  The
bench mark is set 6 cm (0.2 ft) below ground level, crimped to the top of a
galvanized steel rod driven 15.2 m (50 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  4 of  5

                                                                                
Station ID: 8535001                         PUBLICATION DATE:  06/16/2004
Name:       CEDAR SWAMP, TUCKAHOE RIVER                       
            NJ
NOAA Chart: 12318                           Latitude:   39° 14.8' N (  39.24670)
USGS Quad:  MARMORA                         Longitude:  74° 43.1' W ( -74.71830)


                            T I D A L   D A T U M S 


Tidal datums at CEDAR SWAMP, TUCKAHOE RIVER based on:

     LENGTH OF SERIES:      5 MONTHS
     TIME PERIOD:           June 1978 - October 1978
     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   =  1.054
     MEAN HIGH WATER                            MHW    =  0.990
     MEAN SEA LEVEL                             MSL    =  0.671
     MEAN TIDE LEVEL                            MTL    =  0.534
     MEAN LOW WATER                             MLW    =  0.078
     MEAN LOWER LOW WATER                       MLLW   =  0.000

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     5001 A 1978                                 3.010    2.020
     5001 B 1978                                 1.811    0.821
     5001 C 1978                                 3.011    2.021
     5001 D 1978                                 2.095    1.105
     5001 E 1978                                 2.253    1.263


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

                                                                                
Station ID: 8535001                         PUBLICATION DATE:  06/16/2004
Name:       CEDAR SWAMP, TUCKAHOE RIVER                       
            NJ
NOAA Chart: 12318                           Latitude:   39° 14.8' N (  39.24670)
USGS Quad:  MARMORA                         Longitude:  74° 43.1' W ( -74.71830)


                             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 8535001 CEDAR SWAMP, TUCKAHOE RIVER, NJ

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