U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 5
Station ID: 8538886 PUBLICATION DATE: 10/25/2011
Name: TACONY-PALMYRA BRIDGE
NJ
NOAA Chart: 12314 Latitude: 40° 0.7' N ( 40.01194)
USGS Quad: FRANKFORD Longitude: 75° 2.6' W ( -75.04300)
To reach the tidal bench marks from I-95 in Philadelphia proceed north on I-95
to the State Street exit, proceed on State Street to the Franklin Armory, turn
right into the armory, proceed to the boat ramp. Proceed north by boat on the
Delaware River for approximately 1.6 km (1 mi) to the Tacony-Palmyra bridge. The
bench marks and tide station are located on the north abutment of the lift
section of the bridge.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 8886 A 2002
DESIGNATION: 853 8886 A
MONUMENTATION: Tidal Station disk VM#: 16765
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Granite bridge pier OPUS PID:
LATITUDE: 40° 0.7' N ( 40.01203) LONGITUDE: 75° 2.6' W ( -75.04336)
The primary bench mark is a disk set vertically on the west side of the northern
pier of the lift section of the Tacony-Palmyra Bridge, 6.92 m (22.7 ft) south of
the north face of the pier cribbing, 4.10 m (13.5 ft) north of the south face of
the cribbing, and 1.18 m (3.9 ft) above the cribbing floor.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 5
Station ID: 8538886 PUBLICATION DATE: 10/25/2011
Name: TACONY-PALMYRA BRIDGE
NJ
NOAA Chart: 12314 Latitude: 40° 0.7' N ( 40.01194)
USGS Quad: FRANKFORD Longitude: 75° 2.6' W ( -75.04300)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING:
DESIGNATION: 853 8886 LAG 2
MONUMENTATION: Bolt VM#: 16767
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Brass lag bolt OPUS PID:
LATITUDE: 40° 0.7' N ( 40.01194) LONGITUDE: 75° 2.6' W ( -75.04339)
The bench mark is a brass lag bolt driven into the wooden whaler board located
on the west side of the northern abutment of the lift section of the
Tacony-Palmyra, 6.60 m (21.65 ft) north of the gage stand, 2.32 m (7.61 ft)
south of the north of the cribbing, and 0.26 m (0.85 ft) NW of the granite
bridge abutment.
BENCH MARK STAMPING:
DESIGNATION: 853 8886 LAG 3
MONUMENTATION: Bolt VM#: 16768
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Brass lag bolt OPUS PID:
LATITUDE: 40° 0.7' N ( 40.01194) LONGITUDE: 75° 2.6' W ( -75.04278)
The bench mark is a brass lag bolt driven into the wooden whaler board located
on the west side of the northern abutment of the lift section of the bridge on
the Tacony-Palmyra, 9.5 m (31.2 ft) east of the centerline of the bridge
abutment, 0.34 m (1.1 ft) south of the granite wall at the NE corner of the
abutment, and 0.31 m (1.0 ft) south of the north cribbing face.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 5
Station ID: 8538886 PUBLICATION DATE: 10/25/2011
Name: TACONY-PALMYRA BRIDGE
NJ
NOAA Chart: 12314 Latitude: 40° 0.7' N ( 40.01194)
USGS Quad: FRANKFORD Longitude: 75° 2.6' W ( -75.04300)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING:
DESIGNATION: 853 8886 LAG 1 RESET
MONUMENTATION: Bolt VM#: 17723
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Brass lag bolt OPUS PID:
LATITUDE: 40° 0.7' N ( 40.01197) LONGITUDE: 75° 2.6' W ( -75.04328)
The bench mark is a brass lag bolt set ino the wooden whaler board located on
the west side of the northern abutment of the lift section of the
Tacony-Palmyra, 0.84 m (2.8 ft) SE of the NOAA 4-inch well, 0.84 m (2.8 ft) NE
of the NE corner of the granite bridge support, and 0.57 m (1.9 ft) south of the
north face of the crib.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 5
Station ID: 8538886 PUBLICATION DATE: 10/25/2011
Name: TACONY-PALMYRA BRIDGE
NJ
NOAA Chart: 12314 Latitude: 40° 0.7' N ( 40.01194)
USGS Quad: FRANKFORD Longitude: 75° 2.6' W ( -75.04300)
T I D A L D A T U M S
Tidal datums at TACONY-PALMYRA BRIDGE based on:
LENGTH OF SERIES: 9 YEARS
TIME PERIOD: August 2002 - July 2011
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION: 8545240 PHILADELPHIA (USCG STA.), DELAWARE RIVER
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
HIGHEST OBSERVED WATER LEVEL (04/17/2011) = 3.381
MEAN HIGHER HIGH WATER MHHW = 2.179
MEAN HIGH WATER MHW = 2.066
MEAN SEA LEVEL MSL = 1.109
MEAN TIDE LEVEL MTL = 1.062
MEAN LOW WATER MLW = 0.058
MEAN LOWER LOW WATER MLLW = 0.000
LOWEST OBSERVED WATER LEVEL (03/06/2007) = -1.072
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
8886 A 2002 4.789 2.723
853 8886 LAG 2 3.621 1.555
853 8886 LAG 3 3.306 1.240
853 8886 LAG 1 RESET 3.308 1.242
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 5
Station ID: 8538886 PUBLICATION DATE: 10/25/2011
Name: TACONY-PALMYRA BRIDGE
NJ
NOAA Chart: 12314 Latitude: 40° 0.7' N ( 40.01194)
USGS Quad: FRANKFORD Longitude: 75° 2.6' W ( -75.04300)
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.