Superseded Bench Mark Sheet for 8514322, PATCHOGUE, PATCHOGUE RIVER NY

Present Epoch

Printable version

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

                                                   PUBLICATION DATE:  08/13/1991
Station ID: 8514322                                SUPERCEDED DATE:   04/21/2003
Name:       PATCHOGUE, PATCHOGUE RIVER                        
            NEW YORK
NOAA Chart: 12353                                  Latitude:         40° 45.0' N
USGS Quad:  PATCHOGUE                              Longitude:        73°  1.1' W


To reach the tidal bench marks from the intersection of West Main Street
(Montauk Highway) and River Avenue in Patchogue, proceed south on River Avenue
for 1.1 miles (1.8 km), then turn left on Price Street and go 0.2 mile (0.3 km)
to River Point Marine.  The bench marks are near the marina and along the River
Avenue.  The tide gauge and staff were near the inside corner of the main marina
pier.


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


                 PRIMARY BENCH MARK STAMPING:  4322 A 1989

MONUMENTATION:           Survey Disk                               VM#:     4862
AGENCY:                                                            PID:         
SETTING CLASSIFICATION:  Concrete Sea Wall


The primary bench mark is set flush in the top of the concrete sea wall at River
Point Marine, beneath the wood deck along the waterfront, 134 feet (41 m) north
of the 6-foot (2 m) high wooden fence on the south side of the marina, 123 feet
(37 m) south of a 40-foot (12 m) high wooden pole near the marina snack bar, 6.4
feet (2.0 m) west of the east edge of the deck, and 1.8 feet (0.5 m) east of the
west edge of the deck.



                         BENCH MARK STAMPING:  Z 37 1932 21.752

MONUMENTATION:           Survey Disk                               VM#:     4861
AGENCY:                                                            PID#:  KU0520
SETTING CLASSIFICATION:  Concrete Step


The bench mark is set in the middle of the concrete step at the level of the
threshold, in front of the double doors on the east side of the River Avenue
grade school in Patchogue, between Division Street and Montauk Highway, and 0.5
foot (0.l2 m) in front of the double doors.

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

                                                   PUBLICATION DATE:  08/13/1991
Station ID: 8514322                                SUPERCEDED DATE:   04/21/2003
Name:       PATCHOGUE, PATCHOGUE RIVER                        
            NEW YORK
NOAA Chart: 12353                                  Latitude:         40° 45.0' N
USGS Quad:  PATCHOGUE                              Longitude:        73°  1.1' W


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


                         BENCH MARK STAMPING:  4322 B 1989

MONUMENTATION:           Survey Disk                               VM#:     4863
AGENCY:                                                            PID:         
SETTING CLASSIFICATION:  Concrete Sea Wall


The bench mark is set flush in the top of the concrete sea wall south of River
Point Marine, beneath the wood deck along the waterfront at #37 Mapes Avenue,
77.4 feet (23.6 m) SE of the NE corner of the house, 35.3 feet (10.8 m) SE of
the SE corner of the house, 9.5 feet (2.9 m) west of the east side of the deck,
and 0.5 foot (0.2 m) east of the west side.



                         BENCH MARK STAMPING:  4322 C 1989

MONUMENTATION:           Survey Disk                               VM#:     4864
AGENCY:                                                            PID:         
SETTING CLASSIFICATION:  Stainless Steel Rod


The bench mark is 0.1 mile (0.2 km) west of River Point Marine on Price Street,
at the intersection of Price Street and the entrance to Fairfield on the Bay
(condos), 47 feet (14 m) east of a water meter in the street, 31.4 feet (9.6 m)
SW of the SW corner of the residence at #45 Price Street, and 4.0 feet (1.2 m)
NW of power pole #4.  The bench mark is 0.3 foot (0.1 m) below ground level,
crimped to a stainless steel rod driven 68 feet (21 m) to substantial
resistance, and encased in a 5-inch PVC pipe and concrete kickblock.

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

                                                   PUBLICATION DATE:  08/13/1991
Station ID: 8514322                                SUPERCEDED DATE:   04/21/2003
Name:       PATCHOGUE, PATCHOGUE RIVER                        
            NEW YORK
NOAA Chart: 12353                                  Latitude:         40° 45.0' N
USGS Quad:  PATCHOGUE                              Longitude:        73°  1.1' W


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


                         BENCH MARK STAMPING:  4322 D 1989

MONUMENTATION:           Survey Disk                               VM#:     4865
AGENCY:                                                            PID:         
SETTING CLASSIFICATION:  Stainless Steel Rod


The bench mark is 1.1 miles (1.8 km) south on River Avenue from its intersection
with West Main Street, 58.0 (17.7 m) NW of the NW corner of a house, 46.7 feet
(14.2 m) SW of the SW corner of the house at #395 River Avenue, and 2.1 feet
(0.6 m) NE of power pole #46J.  The bench mark is 0.3 foot (0.1 m) below ground
level, crimped to a stainless steel rod driven 56 feet (17 m) to substantial
resistance, and encased in a 5-inch PVC pipe and concrete kickblock.



                         BENCH MARK STAMPING:  4322 E 1989

MONUMENTATION:           Survey Disk                               VM#:     4866
AGENCY:                                                            PID:         
SETTING CLASSIFICATION:  Stainless Steel Rod


The bench mark is at the NE corner of the intersection of River Avenue and
Crescent Street, 40.0 feet (12.2 m) NE of a guide pole on the west side of River
Avenue, 6.0 feet (1.8 m) NE of NYT power pole #43, and 2.6 feet (0.8 m) NW of
the corner post of a chain link fence.  The bench mark is 0.4 foot (0.1 m) below
ground level, crimped to a stainless steel rod driven 78 feet (24 m) to
substantial resistance, and encased in a 5-inch PVC pipe and concrete kickblock.

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

                                                   PUBLICATION DATE:  08/13/1991
Station ID: 8514322                                SUPERCEDED DATE:   04/21/2003
Name:       PATCHOGUE, PATCHOGUE RIVER                        
            NEW YORK
NOAA Chart: 12353                                  Latitude:         40° 45.0' N
USGS Quad:  PATCHOGUE                              Longitude:        73°  1.1' W


                            T I D A L   D A T U M S 


Tidal datums at PATCHOGUE, PATCHOGUE RIVER based on:

     LENGTH OF SERIES:      12 MONTHS
     TIME PERIOD:           AUGUST 1989-JULY 1990
     TIDAL EPOCH:           1960-1978
     CONTROL TIDE STATION:  8518750 THE BATTERY


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

     HIGHEST OBSERVED WATER LEVEL (11/16/1989)         =   3.14
     MEAN HIGHER HIGH WATER                     MHHW   =   1.39
     MEAN HIGH WATER                            MHW    =   1.22
     MEAN TIDE LEVEL                            MTL    =   0.66
     MEAN LOW WATER                             MLW    =   0.10
     MEAN LOWER LOW WATER                       MLLW   =   0.00
   * NATIONAL GEODETIC VERTICAL DATUM           NGVD29 =  -0.20
     LOWEST  OBSERVED WATER LEVEL (02/21/1990)         =  -1.12

   * NGVD reference based on elevations published in Quad 400731, 1968, and NOS
     leveling of 1991. 
North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In FEET above:

     Stamping or Designation                    MLLW        MHW

     4322 A 1989                                 3.44      2.22
     Z 37 1932 21.752                           21.56     20.34
     4322 B 1989                                 3.38      2.16
     4322 C 1989                                 5.27      4.05
     4322 D 1989                                 4.48      3.26
     4322 E 1989                                 4.31      3.09


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

                                                   PUBLICATION DATE:  08/13/1991
Station ID: 8514322                                SUPERCEDED DATE:   04/21/2003
Name:       PATCHOGUE, PATCHOGUE RIVER                        
            NEW YORK
NOAA Chart: 12353                                  Latitude:         40° 45.0' N
USGS Quad:  PATCHOGUE                              Longitude:        73°  1.1' 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.

Return to Top
Products available at 8514322 PATCHOGUE, PATCHOGUE RIVER, NY