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Bench Mark Sheet for 8540433, Marcus Hook PA

Superseded Epoch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Small blue map location marker Unpublished bench mark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: 8540433                                PUBLICATION DATE:  12/11/2012
Name:       MARCUS HOOK                                       
            PENNSYLVANIA
NOAA Chart: 12312                                  Latitude:         39° 48.7' N
USGS Quad:  MARCUS HOOK                            Longitude:        75° 24.6' W


To reach the tidal bench marks from the Philadelphia Airport take I-95 South for
16.1 km (10.0 mi) to Exit 2 (Market Street 454) in the town of Marcus Hook,
Pennsylvania, go 452 South for 2.4 km (1.6 mi) to West Delaware Avenue, turn
right (east) and go one block to the entrance of Sunoco plant. The bench marks
are located in the area around the U.S. Army Defense Logistics Agency.  The tide
staff and gage were located at the end of the longest wooden pier.


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


                 PRIMARY BENCH MARK STAMPING:  0433 E 1981
                         DESIGNATION:          854 0433 E

MONUMENTATION:           Tidal Station disk                        VM#:     2904
AGENCY:                  National Ocean Survey (NOS)               PID:         
SETTING CLASSIFICATION:  Flag pole foundation


The primary bench mark is a disk set in the concrete base of the flag pole on
the property of the Visionquest Center, 26.88 m (88.2 ft) north of the SW corner
of the Visionquest building, 12.03 m (39.5 ft) NW of the northern corner of the
Visionquest building, 0.63 m (2.1 ft) west of the outer edge of the flag pole
base, and 0.3 m (1 ft) above ground.



                         BENCH MARK STAMPING:   
                         DESIGNATION:          854 0433 NO STAMPING

MONUMENTATION:           Survey disk                               VM#:    16810
AGENCY:                  Shell Oil                                 PID:         
SETTING CLASSIFICATION:  Steel & concrete pier


The bench mark is a disk set in the concrete pier of Fuel Dock # 1, located near
the offshore end of the pier and next to the NOAA tide shelter, 19.33 m (63.4
ft) SSE of a yellow bollard on the pier, 5.35 m (17.6 ft) NNW of the NOAA well,
and 0.45 m (1.5 ft) east of the concrete abutment on the west side of the pier.

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

                                                                                
Station ID: 8540433                                PUBLICATION DATE:  12/11/2012
Name:       MARCUS HOOK                                       
            PENNSYLVANIA
NOAA Chart: 12312                                  Latitude:         39° 48.7' N
USGS Quad:  MARCUS HOOK                            Longitude:        75° 24.6' W


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


                         BENCH MARK STAMPING:  0433 F 2002
                         DESIGNATION:          854 0433 F

MONUMENTATION:           Tidal Station disk                        VM#:    16811
AGENCY:                  National Ocean Service (NOS)              PID:         
SETTING CLASSIFICATION:  Steel & concrete pier


The bench mark is a disk set in the concrete cap of a steel sheet pile bulkhead
at the shore end of Number 1 Dock, 12.23 m (40.1 ft) west of the centerline of
the catwalk leading to a corrugated fiberglass building, 7.71 m (25.3 ft) south
of the NE corner of the same corrugated fiberglass building, 7.65 m (25.1 ft)
east of the centerline of River Road.



                         BENCH MARK STAMPING:  H 10 RESET 1963
                         DESIGNATION:          H 10 RESET 1963

MONUMENTATION:           Bench Mark disk                           VM#:    18158
AGENCY:                  US Coast and Geodetic Survey (USC&GS)     PID#:  JU0780
SETTING CLASSIFICATION:  Concrete step


The bench mark is a disk set on top of the concrete step at the south entrance
to the guard building, at the entrance to Sun Oil Company property, 2.74 m (9
ft) NW of the center line of the exit driveway leading NE from property, and
about 0.3 (1 ft) above the level of the driveway.

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

                                                                                
Station ID: 8540433                                PUBLICATION DATE:  12/11/2012
Name:       MARCUS HOOK                                       
            PENNSYLVANIA
NOAA Chart: 12312                                  Latitude:         39° 48.7' N
USGS Quad:  MARCUS HOOK                            Longitude:        75° 24.6' W


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


                         BENCH MARK STAMPING:  0433 G 2006
                         DESIGNATION:          854 0433 G

MONUMENTATION:           Tidal Station disk                        VM#:    18159
AGENCY:                  National Ocean Service (NOS)              PID:         
SETTING CLASSIFICATION:  Concrete steps


The bench mark is set in the second step of the first set concrete stpes on the
south side of Admin Builing, 9.42 m (30.91 ft) south of double doors on the
south side of main building, 31.24 m (102.49 ft) east of the west curb of main
building on south side of main building, 26.53 m (87.04 ft) west of the east
curb on the south side of main building, 6.74 m (22.11 ft) north of centerline
of drain on the south side of main buliding, 0.29 m (0.95 ft) above the ground
and on the west side of the second step leading to the south side of main
buliding. 

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

                                                                                
Station ID: 8540433                                PUBLICATION DATE:  12/11/2012
Name:       MARCUS HOOK                                       
            PENNSYLVANIA
NOAA Chart: 12312                                  Latitude:         39° 48.7' N
USGS Quad:  MARCUS HOOK                            Longitude:        75° 24.6' W


                            T I D A L   D A T U M S 


Tidal datums at MARCUS HOOK 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 (10/30/2012)         =  3.092
     MEAN HIGHER HIGH WATER                     MHHW   =  1.871
     MEAN HIGH WATER                            MHW    =  1.759
     MEAN SEA LEVEL                             MSL    =  0.954
     MEAN TIDE LEVEL                            MTL    =  0.907
     MEAN LOW WATER                             MLW    =  0.054
     MEAN LOWER LOW WATER                       MLLW   =  0.000
     LOWEST  OBSERVED WATER LEVEL (03/06/2007)         = -1.074

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     0433 E 1981                                 3.415    1.656
     854 0433 NO STAMPING                        3.318    1.559
     0433 F 2002                                 3.355    1.596
     H 10 RESET 1963                             3.291    1.532
     0433 G 2006                                 3.216    1.457


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

                                                                                
Station ID: 8540433                                PUBLICATION DATE:  12/11/2012
Name:       MARCUS HOOK                                       
            PENNSYLVANIA
NOAA Chart: 12312                                  Latitude:         39° 48.7' N
USGS Quad:  MARCUS HOOK                            Longitude:        75° 24.6' W


                             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 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 8540433 Marcus Hook, PA

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