Bench Mark Sheet for 8516402, Point Lookout 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Superseded Epoch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Small blue map location marker Unpublished bench mark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  8

                                                                                
Station ID: 8516402                         PUBLICATION DATE:  11/24/2014
Name:       POINT LOOKOUT, JONES INLET                        
            NY
NOAA Chart: 12352                           Latitude:   40° 35.6' N (  40.59389)
USGS Quad:  JONES INLET                     Longitude:  73° 35.0' W ( -73.58397)


To reach the station from the intersection of Loop Parkway and Lido Boulevard on
Long Beach Island, proceed E on Lido Boulevard 0.3 km (0.2 mi) to the
intersection with Parkside road drive, turn left and proceed N 0.14 km (0.1 mi)
on Parkside road drive to the town of Hempstead laboratory and the tide station
on the left.  Bench marks are near the tide station, along Lido Blvd. And at the
US Coast Guard station.


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


                 PRIMARY BENCH MARK STAMPING:  11E02NAZ
                         DESIGNATION:          11E 02N AZ

MONUMENTATION:           Flange-encased Rod                    VM#:        21128
AGENCY:                  NCDPW                                 IDB PID#:  KU4895
SETTING CLASSIFICATION:  Stainless steel rod in sleeve         OPUS PID#: KU4895
LATITUDE:   40° 35.6' N (  40.59350)          LONGITUDE:  73° 35.0' W ( -73.58386)


The primary bench mark is a flange encased rod set in the sidewalk on the W side
of Parkside road drive, 11.65 m (38.2 ft) E of the Town of Hempstead department
of conservation and waterways laboratory building, 8.79 m (28.8 ft) NNE of the
flagpole, 6.56 m (21.5 ft) W of the centerline of Parkside road drive, 3.25 m
(10.7 ft) NNW of a power pole with tag Lipa 2-35 and 2.65 m (8.7 ft) SSW of a
fire hydrant. The bench mark is set 14 cm (6 inches) below grade being the top
of a stainless steel rod encased in a NCDPW logo cover.



                         BENCH MARK STAMPING:  11E 02N 2001
                         DESIGNATION:          11E 02N RESET

MONUMENTATION:           Flange-encased Rod                    VM#:        21129
AGENCY:                  NCDPW                                 IDB PID#:  AM7043
SETTING CLASSIFICATION:  Stainless steel rod in sleeve         OPUS PID:        
LATITUDE:   40° 35.3' N (  40.58797)          LONGITUDE:  73° 35.0' W ( -73.58386)


The bench mark is a flange encased rod set in the sidewalk on the W side of
Parkside road drive, 42.18 m (138.4 ft) N of the stop sign at the intersection
with Ocean Boulevard, 17.25 m (56.6 ft) SW of the power pole with metal tag NVT
19, 12.63 m (41.4 ft) S of the speed limit and no parking signs, 1.23 m (4.0 ft)
E of a 1.2 m (3.9 ft) tall white stucco wall and 1.17 m (3.8 ft) W of the curb
face. The bench mark is set 8 cm (3 inches) below grade being the top of a
stainless steel rod encased in a NCDPW logo cover.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  2 of  8

                                                                                
Station ID: 8516402                         PUBLICATION DATE:  11/24/2014
Name:       POINT LOOKOUT, JONES INLET                        
            NY
NOAA Chart: 12352                           Latitude:   40° 35.6' N (  40.59389)
USGS Quad:  JONES INLET                     Longitude:  73° 35.0' W ( -73.58397)


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


                         BENCH MARK STAMPING:  A 493 NC
                         DESIGNATION:          A 493

MONUMENTATION:           See descriptive text                  VM#:        21130
AGENCY:                  Unknown                               IDB PID#:  KU1533
SETTING CLASSIFICATION:  Copper plug in a concrete monument    OPUS PID:        
LATITUDE:   40° 35.5' N (  40.59203)          LONGITUDE:  73° 34.8' W ( -73.57978)


The bench mark is a copper plug in a concrete monument at the SW corner of the
intersection, 8.58 m (28.1 ft) S of the centerline of lido boulevard, 8.03 m
(26.3 ft) W of the centerline of Hewlett Avenue, 1.68 m (5.5 ft) E of a
deciduous tree, 0.94 m (3.1 ft) S of the face of the curb, 0.67 m (2.2 ft) W of
the sidewalk, 0.56 m (1.8 ft) N of the sidewalk and 0.46 m (1.5 ft) SE of a snow
emergency and no parking sign.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  3 of  8

                                                                                
Station ID: 8516402                         PUBLICATION DATE:  11/24/2014
Name:       POINT LOOKOUT, JONES INLET                        
            NY
NOAA Chart: 12352                           Latitude:   40° 35.6' N (  40.59389)
USGS Quad:  JONES INLET                     Longitude:  73° 35.0' W ( -73.58397)


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


                         BENCH MARK STAMPING:  GUARD 1934
                         DESIGNATION:          GUARD

MONUMENTATION:           Triangulation Station disk            VM#:        21131
AGENCY:                  US Coast and Gedetic Survey           IDB PID#:  KU1530
SETTING CLASSIFICATION:  Top of a concrete monument            OPUS PID:        
LATITUDE:   40° 35.5' N (  40.59144)          LONGITUDE:  73° 34.9' W ( -73.58100)


The bench mark is a disk in a concrete monument buried beneath the metal tower
at the SE corner of the point lookout community church parking lot, 16.88 m
(55.4 ft) ENE of the NE corner of the steps to the church, 6.94 m (22.8 ft) NW
of the NE corner of the parsonage house, 2.31 m (7.6 ft) SW of the NE metal leg
of the tower and 2.28 m (7.5 ft) NW of the SE metal leg of the tower, and 0.23 m
(0.8 ft) below grade.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  4 of  8

                                                                                
Station ID: 8516402                         PUBLICATION DATE:  11/24/2014
Name:       POINT LOOKOUT, JONES INLET                        
            NY
NOAA Chart: 12352                           Latitude:   40° 35.6' N (  40.59389)
USGS Quad:  JONES INLET                     Longitude:  73° 35.0' W ( -73.58397)


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


                         BENCH MARK STAMPING:  GUARD NO 1
                         DESIGNATION:          GUARD RM 1

MONUMENTATION:           Reference Mark disk                   VM#:        21132
AGENCY:                  US Coast and Geodetic Survey          IDB PID#:  KU1531
SETTING CLASSIFICATION:  Concrete apron                        OPUS PID:        
LATITUDE:   40° 35.5' N (  40.59164)          LONGITUDE:  73° 34.9' W ( -73.58111)


The bench mark is a disk in a concrete apron on the W side of the church office
building in the NW quarter of the parking lot, 27.47 m (90.1 ft) NNE of the NE
corner of the stairs to the church, 24.20 m (79.4 ft) NNW of triangulation
station guard, 3.20 m (10.5 ft) S of the NE corner of the building, 3.17 m (10.4
ft) SE of the SE corner of a storage shed, 1.46 m (4.8 ft) N of the SE Corner of
the building, 0.72 m (2.4 ft) W of the building and 0.51 m (1.7 ft) N of the S
edge of the concrete apron.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  5 of  8

                                                                                
Station ID: 8516402                         PUBLICATION DATE:  11/24/2014
Name:       POINT LOOKOUT, JONES INLET                        
            NY
NOAA Chart: 12352                           Latitude:   40° 35.6' N (  40.59389)
USGS Quad:  JONES INLET                     Longitude:  73° 35.0' W ( -73.58397)


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


                         BENCH MARK STAMPING:  GUARD NO 2
                         DESIGNATION:          GUARD RM 2

MONUMENTATION:           Reference Mark disk                   VM#:        21133
AGENCY:                  US Coast and Geodetic Survey          IDB PID#:  KU1532
SETTING CLASSIFICATION:  Concrete pavement                     OPUS PID:        
LATITUDE:   40° 35.5' N (  40.59144)          LONGITUDE:  73° 34.9' W ( -73.58092)


The bench mark is a disk set in concrete street, 26.50 m (86.9 ft) NNW of a fire
hydrant on the E side of the street, 9.45 m (31.0 ft) NE of the NE corner of the
parsonage house, 2.94 m (9.6 ft) W of the centerline of Garden City Avenue and
0.98 m (3.2 ft) E of the face of the curb.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  6 of  8

                                                                                
Station ID: 8516402                         PUBLICATION DATE:  11/24/2014
Name:       POINT LOOKOUT, JONES INLET                        
            NY
NOAA Chart: 12352                           Latitude:   40° 35.6' N (  40.59389)
USGS Quad:  JONES INLET                     Longitude:  73° 35.0' W ( -73.58397)


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


                         BENCH MARK STAMPING:  GAGING STATION
                         DESIGNATION:          GAGING STATION

MONUMENTATION:           Bench Mark disk                       VM#:        21134
AGENCY:                  US Geological Survey                  IDB PID#:        
SETTING CLASSIFICATION:  Concrete slab                         OPUS PID:        
LATITUDE:   40° 35.6' N (  40.59358)          LONGITUDE:  73° 35.0' W ( -73.58411)


The bench mark is disk set in a concrete slab, 18.88 m (61.9 ft) S of the new
bulkhead, 9.87 m (32.4 ft) SW of the fence post on the N side of the vehicle
gate, 2.24 m (7.3 ft) WSW of the center of the entrance door and 0.91 m (3.0 ft)
N of the N side of the brick building.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  7 of  8

                                                                                
Station ID: 8516402                         PUBLICATION DATE:  11/24/2014
Name:       POINT LOOKOUT, JONES INLET                        
            NY
NOAA Chart: 12352                           Latitude:   40° 35.6' N (  40.59389)
USGS Quad:  JONES INLET                     Longitude:  73° 35.0' W ( -73.58397)


                            T I D A L   D A T U M S 


Tidal datums at POINT LOOKOUT, JONES INLET 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   =  1.418
     MEAN HIGH WATER                            MHW    =  1.319
     MEAN TIDE LEVEL                            MTL    =  0.688
     MEAN SEA LEVEL                             MSL    =  0.681
     MEAN LOW WATER                             MLW    =  0.056
     MEAN LOWER LOW WATER                       MLLW   =  0.000

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     11E02NAZ                                    2.735    1.416
     11E 02N 2001                                3.748    2.429
     A 493 NC                                    3.073    1.754
     GUARD 1934                                  2.816    1.497
     GUARD NO 1                                  3.108    1.789
     GUARD NO 2                                  2.872    1.553
     GAGING STATION                              3.149    1.830


                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  8 of  8

                                                                                
Station ID: 8516402                         PUBLICATION DATE:  11/24/2014
Name:       POINT LOOKOUT, JONES INLET                        
            NY
NOAA Chart: 12352                           Latitude:   40° 35.6' N (  40.59389)
USGS Quad:  JONES INLET                     Longitude:  73° 35.0' W ( -73.58397)


                             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.

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