U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
Datums Page                                                        Page  1 of  5

                                                                                
Station ID: 8539058                         PUBLICATION DATE:  08/11/2004
Name:       ASSISCUNK CREEK, DELAWARE RIVER                   
            NJ
NOAA Chart: 12314                           Latitude:   40°  4.4' N (  40.07330)
USGS Quad:  BRISTOL                         Longitude:  74° 50.9' W ( -74.84830)


To reach the tidal bench marks from John F. Kennedy Lake in Burlington, NJ,
proceed NE on U.S. Route 130 to the highway bridge over Assiscunk Creek.  The
bench marks are located on the bridge abutments of three adjacent bridges over
Assiscunk Creek.  The tide gage and staff were located on the NE concrete wing
wall of the bridge.


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


                 PRIMARY BENCH MARK STAMPING:  9058 A 1977
                         DESIGNATION:          853 9058 A TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         2880
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  KV6660
SETTING CLASSIFICATION:  Concrete bridge abutment              OPUS PID:        
LATITUDE:   40°  4.5' N (  40.07500)          LONGITUDE:  74° 50.9' W ( -74.84830)


The primary bench mark is a disk set flush in the concrete abutment wing wall,
17.71 m (58.1 ft) SW of its NE extremity, 7.65 m (25.1 ft) south of wood utility
pole #2916, 2.47 m (8.1 ft) SE of the easterly concrete curb of the bridge, and
0.40 m (1.3 ft) east of the corner of the concrete bridge railing.

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

                                                                                
Station ID: 8539058                         PUBLICATION DATE:  08/11/2004
Name:       ASSISCUNK CREEK, DELAWARE RIVER                   
            NJ
NOAA Chart: 12314                           Latitude:   40°  4.4' N (  40.07330)
USGS Quad:  BRISTOL                         Longitude:  74° 50.9' W ( -74.84830)


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


                         BENCH MARK STAMPING:  9058 B 1977
                         DESIGNATION:          853 9058 B TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         2881
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  KV6661
SETTING CLASSIFICATION:  Concrete bridge abutment              OPUS PID:        
LATITUDE:   40°  4.4' N (  40.07330)          LONGITUDE:  74° 50.9' W ( -74.84830)


The bench mark is a disk set flush in the concrete abutment wing wall, 27.61 m
(90.6 ft) NNE of a steel sign reading "Right Lane Ends," 2.44 m (8.0 ft) NW of
the west curb of the bridge, 0.76 m (2.5 ft) SW of the southernmost inside
corner of the concrete bridge railing, and 0.67 m (2.2 ft) NW of the steel guard
rail.



                         BENCH MARK STAMPING:  9058 C 1977
                         DESIGNATION:          853 9058 C TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         2882
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  KV6662
SETTING CLASSIFICATION:  Concrete bridge abutment              OPUS PID#: KV6662
LATITUDE:   40°  4.5' N (  40.07500)          LONGITUDE:  74° 50.9' W ( -74.84830)


The bench mark is a disk set flush in the western extremity of the concrete
abutment wing wall, 37 m (120 ft) north of bench mark 9058 B 1977, 13.62 m (44.7
ft) WSW of wood utility pole #1246 BC, 2.29 m (7.5 ft) south of the NE end of
the concrete bridge railing, and 0.94 m (3.1 ft) south of the NE end of an iron
pipe rail fence.

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

                                                                                
Station ID: 8539058                         PUBLICATION DATE:  08/11/2004
Name:       ASSISCUNK CREEK, DELAWARE RIVER                   
            NJ
NOAA Chart: 12314                           Latitude:   40°  4.4' N (  40.07330)
USGS Quad:  BRISTOL                         Longitude:  74° 50.9' W ( -74.84830)


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


                         BENCH MARK STAMPING:  9058 D 1977
                         DESIGNATION:          853 9058 D TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         2883
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  KV6663
SETTING CLASSIFICATION:  Concrete bridge abutment              OPUS PID:        
LATITUDE:   40°  4.5' N (  40.07500)          LONGITUDE:  74° 50.9' W ( -74.84830)


The bench mark is a disk set flush in lower abutment at the NW end of the US
Highway 130 southbound bridge, 43 m (140 ft) west of bench mark 9058 C 1977,
4.21 m (13.8 ft) north of wood utility pole #PS 2660 BC, 1.07 m (3.5 ft) NW of
the SW extremity of the bridge railing, and 0.49 m (1.6 ft) NW of the abutment
wall.

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

                                                                                
Station ID: 8539058                         PUBLICATION DATE:  08/11/2004
Name:       ASSISCUNK CREEK, DELAWARE RIVER                   
            NJ
NOAA Chart: 12314                           Latitude:   40°  4.4' N (  40.07330)
USGS Quad:  BRISTOL                         Longitude:  74° 50.9' W ( -74.84830)


                            T I D A L   D A T U M S 


Tidal datums at ASSISCUNK CREEK, DELAWARE RIVER based on:

     LENGTH OF SERIES:      2 MONTHS
     TIME PERIOD:           October 1977 - November 1977
     TIDAL EPOCH:           1983-2001
     CONTROL TIDE STATION:  8545530 PHILADELPHIA (PIER 11 NORTH), DEL. RIVER


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

     MEAN HIGHER HIGH WATER                     MHHW   =  2.205
     MEAN HIGH WATER                            MHW    =  2.108
     MEAN SEA LEVEL                             MSL    =  1.094
     MEAN TIDE LEVEL                            MTL    =  1.080
     North American Vertical Datum              NAVD88 =  0.903
     MEAN LOW WATER                             MLW    =  0.051
     MEAN LOWER LOW WATER                       MLLW   =  0.000

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     9058 A 1977                                 4.692    2.584
     9058 B 1977                                 5.358    3.250
     9058 C 1977                                 3.793    1.685
     9058 D 1977                                 2.988    0.880


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

                                                                                
Station ID: 8539058                         PUBLICATION DATE:  08/11/2004
Name:       ASSISCUNK CREEK, DELAWARE RIVER                   
            NJ
NOAA Chart: 12314                           Latitude:   40°  4.4' N (  40.07330)
USGS Quad:  BRISTOL                         Longitude:  74° 50.9' W ( -74.84830)


                             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.