NOAA Web Site Link Tides and Currents Home Page Transparent placeholder image

Bench Mark Sheet for 8516661, Bay Park, NY NY

Superseded Epoch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Small blue map location marker Unpublished bench mark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: 8516661                         PUBLICATION DATE:  12/05/2014
Name:       BAY PARK, EAST ROCKAWAY, HEWLETT BAY              
            NY
NOAA Chart: 12352                           Latitude:   40° 37.8' N (  40.63000)
USGS Quad:  LYNBROOK                        Longitude:  73° 40.2' W ( -73.67000)


To reach the station from the intersection of sunrise highway route 27 and
Atlantic Avenue in valley stream, proceed 1.8 km (1.1 mi) S on Atlantic Avenue
to the intersection with main street, turn left and proceed 0.1 km (0.1 mi) W on
Main Street to the intersection with Rhame Avenue, turn right and proceed 0.1 km
(0.1 mi) S on Rhame Ave to the intersection with Althouse Avenue, turn left and
proceed 0.15 km (0.1 mi) W on Althouse Ave to the intersection with 1st Avenue,
then turn right and proceed 1.0 km (0.6 mi) S to the end of 1st Avenue and the
station at the Nassau county police department marine base straight ahead. Bench
marks are on the grounds of police department facility and in Bay Park.


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


                 PRIMARY BENCH MARK STAMPING:  6661 A 2014
                         DESIGNATION:          851 6661 A

MONUMENTATION:           Flange-encased Rod                    VM#:        21115
AGENCY:                  National Ocean Service                IDB PID#:        
SETTING CLASSIFICATION:  Stainless steel rod in sleeve         OPUS PID#: BBDM51
LATITUDE:   40° 37.7' N (  40.62842)          LONGITUDE:  73° 40.0' W ( -73.66700)


The primary bench mark is a flange encased rod set in the grass 35.70 m (117.1
ft) S of the SE corner of a small white building, 31.77 m (104.2 ft) S of the NE
corner of the boat basin, 16.76 m (55.0 ft) NNE of the fence along the south end
of the property, 5.59 m (18.3 ft) ESE of the seaward side of the bulkhead and
1.67 m (5.5 ft) W of the fence along the adjacent golf course.    The bench mark
is set 9 cm (4 in) below grade being the top of a stainless steel rod driven
26.8 m (88 ft) to refusal and encased in a 5-inch pvc pipe with concrete
kickblock and NOS logo cap.

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

                                                                                
Station ID: 8516661                         PUBLICATION DATE:  12/05/2014
Name:       BAY PARK, EAST ROCKAWAY, HEWLETT BAY              
            NY
NOAA Chart: 12352                           Latitude:   40° 37.8' N (  40.63000)
USGS Quad:  LYNBROOK                        Longitude:  73° 40.2' W ( -73.67000)


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


                         BENCH MARK STAMPING:  6661 B 2014
                         DESIGNATION:          851 6661 B

MONUMENTATION:           Bench Mark disk                       VM#:        21116
AGENCY:                  National Ocean Service                IDB PID#:        
SETTING CLASSIFICATION:  Concrete track for travel lift        OPUS PID:        
LATITUDE:   40° 37.7' N (  40.62883)          LONGITUDE:  73° 40.0' W ( -73.66739)


The bench mark is a disk set in the E concrete track for the travel lift, 21.08
m (69.2 ft) WSW of the SW corner of a 1 m (3.3 ft) tall cinderblock wall
enclosing underground fuel tanks, 15.92 m (52.2 ft) S of the NE corner of the
slip for the travel lift, 8.65 m (28.4 ft) WSW of a light pole near the bulkhead
and 1.04 m (3.4 ft) N of the seaward side of the bulkhead.



                         BENCH MARK STAMPING:  6661 C 2014
                         DESIGNATION:          851 6661 C

MONUMENTATION:           Bench Mark disk                       VM#:        21117
AGENCY:                  National Ocean Service                IDB PID#:        
SETTING CLASSIFICATION:  Concrete mat infront of a garage door OPUS PID:        
LATITUDE:   40° 37.8' N (  40.62947)          LONGITUDE:  73° 40.1' W ( -73.66764)


The bench mark is a disk set at the W end of the W most garage door on the S
side of the building, 66.05 m (216.7 ft) N of the bulkhead, 19.10 m (62.7 ft) W
of the SW corner of the E half of the building which is brick, 2.66 m (8.7 ft) E
of the SW corner of the building and 0.20 m (0.7 ft) E of the W side of the
garage door.

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

                                                                                
Station ID: 8516661                         PUBLICATION DATE:  12/05/2014
Name:       BAY PARK, EAST ROCKAWAY, HEWLETT BAY              
            NY
NOAA Chart: 12352                           Latitude:   40° 37.8' N (  40.63000)
USGS Quad:  LYNBROOK                        Longitude:  73° 40.2' W ( -73.67000)


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


                         BENCH MARK STAMPING:  6661 D 2014
                         DESIGNATION:          851 6661 D

MONUMENTATION:           Flange-encased Rod                    VM#:        21118
AGENCY:                  National Ocean Service                IDB PID#:        
SETTING CLASSIFICATION:  Stainless steel rod in sleeve         OPUS PID:        
LATITUDE:   40° 37.8' N (  40.63044)          LONGITUDE:  73° 40.0' W ( -73.66739)


The bench mark is a flange encased rod set in the grass at the NE corner of the
intersection, 25.34 m (83.1 ft) NNE of a light pole, 16.00 m (52.5 ft) WNW of
the NW corner of a rectangular storm drain, 15.62 m (51.2 ft) WSW of the most W
tree in the row along the S edge of the open field, 14.52 m (47.6 ft) ESE of the
centerline of first avenue and 10.26 m (33.7 ft) NNE of the centerline of harbor
road.    The bench mark is set 9 cm (4 in) below grade being the top of a
stainless steel rod driven 26.8 m (88 ft) to refusal and encased in a 5-inch pvc
pipe with concrete kickblock and NOS logo cap.



                         BENCH MARK STAMPING:  6661 E 2014
                         DESIGNATION:          851 6661 E

MONUMENTATION:           Bench Mark disk                       VM#:        21119
AGENCY:                  National Ocean Service                IDB PID#:        
SETTING CLASSIFICATION:  Concrete steps                        OPUS PID:        
LATITUDE:   40° 37.9' N (  40.63189)          LONGITUDE:  73° 40.0' W ( -73.66611)


The bench mark is a disk set in the landing of the concrete stairs adjacent to
the splash park, 43.04 m (141.2 ft) SE of a flag pole, 36.86 m (120.9 ft) SE of
the SW corner of the brick building with restrooms, 23.03 m (75.6 ft) NNE of the
N most post of a 6 sided pavilion roof, 14.54 m (47.7 ft) SW of a light pole at
the N end of the splash park and 0.28 m (0.9 ft) W of the fence on the W side of
splash park.

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

                                                                                
Station ID: 8516661                         PUBLICATION DATE:  12/05/2014
Name:       BAY PARK, EAST ROCKAWAY, HEWLETT BAY              
            NY
NOAA Chart: 12352                           Latitude:   40° 37.8' N (  40.63000)
USGS Quad:  LYNBROOK                        Longitude:  73° 40.2' W ( -73.67000)


                            T I D A L   D A T U M S 


Tidal datums at BAY PARK, EAST ROCKAWAY, HEWLETT BAY based on:

     LENGTH OF SERIES:      3 MONTHS
     TIME PERIOD:           May 2014 - July 2014
     TIDAL EPOCH:           1983-2001
     CONTROL TIDE STATION:  8531680 SANDY HOOK


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

     MEAN HIGHER HIGH WATER                     MHHW   =  1.571
     MEAN HIGH WATER                            MHW    =  1.469
     MEAN SEA LEVEL                             MSL    =  0.782
     MEAN TIDE LEVEL                            MTL    =  0.764
     MEAN LOW WATER                             MLW    =  0.058
     MEAN LOWER LOW WATER                       MLLW   =  0.000

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     6661 A 2014                                 2.112    0.643
     6661 B 2014                                 2.414    0.945
     6661 C 2014                                 2.964    1.495
     6661 D 2014                                 2.155    0.686
     6661 E 2014                                 3.818    2.349


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

                                                                                
Station ID: 8516661                         PUBLICATION DATE:  12/05/2014
Name:       BAY PARK, EAST ROCKAWAY, HEWLETT BAY              
            NY
NOAA Chart: 12352                           Latitude:   40° 37.8' N (  40.63000)
USGS Quad:  LYNBROOK                        Longitude:  73° 40.2' W ( -73.67000)


                             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.

Return to Top
Products available at 8516661 Bay Park, NY, NY

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