Superseded Bench Mark Sheet for 8510560, Montauk NY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:  12/12/1989
Station ID: 8510560                                SUPERCEDED DATE:   04/21/2003
Name:       MONTAUK, FORT POND BAY                            
            NEW YORK
NOAA Chart: 13209                                  Latitude:         41°  2.9' N
USGS Quad:  MONTAUK POINT                          Longitude:        71° 57.6' W


To reach the tidal bench marks from the traffic circle in Montauk, proceed north
on Edgemont Road (State Highway 49) for 1.2 miles (1.9 km) to the Rough Rider
Condominium complex.  The bench marks are on the condominium grounds and to the
north, in the vicinity of Duryea's Seafood.  The tide gage and staff are in the
NE corner of the Rough Rider Condominium pier.


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


                 PRIMARY BENCH MARK STAMPING:  0560 J 1977

MONUMENTATION:           Survey Disk                               VM#:      261
AGENCY:                                                            PID#:  AH6725
SETTING CLASSIFICATION:  Stainless Steel Rod


The bench mark is at the foot of the Rough Rider Condominium pier, 14.3 feet
(4.4 m) south of the shoreward end of the pier, 11.7 feet (3.6 m) west of the
centerline of the pier, 1 foot (0.3 m) north of the north edge of a sidewalk,
and 1 foot (0.3 m) west of the west edge of the access road to the pier.  The
bench mark is at ground level, crimped to a stainless steel rod driven 42 feet
(13 m) to refusal, and encased in a 4-inch PVC pipe and concrete kickblock.



                         BENCH MARK STAMPING:  NO 8 1947

MONUMENTATION:           Survey Disk                               VM#:      260
AGENCY:                                                            PID#:  LW0832
SETTING CLASSIFICATION:  Concrete Manhole Rim


The bench mark is set flush in the concrete pavement around a manhole in the
Rough Rider Condominium complex, 196.0 feet (59.7 m) SW of the west edge of the
north-south running boardwalk, 113 feet (34 m) NE of the centerline of the road
leading to the pier, and 22.6 feet (6.9 m) NW of the north edge of the east-west
running boardwalk.

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

                                                   PUBLICATION DATE:  12/12/1989
Station ID: 8510560                                SUPERCEDED DATE:   04/21/2003
Name:       MONTAUK, FORT POND BAY                            
            NEW YORK
NOAA Chart: 13209                                  Latitude:         41°  2.9' N
USGS Quad:  MONTAUK POINT                          Longitude:        71° 57.6' W


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


                         BENCH MARK STAMPING:  0560 K 1988

MONUMENTATION:           Survey Disk                               VM#:      262
AGENCY:                                                            PID#:  AH6726
SETTING CLASSIFICATION:  Stainless Steel Rod


The bench mark is at the SW corner of a parking lot in the vicinity of the pier,
175 feet (53 m) SSE of the SE corner of a small building at the end of the pier,
115.3 feet (35.1 m) north of a wooden walkway behind the southernmost
condominium building, and 111.4 feet (34.0 m) SW of the centerline of the access
road leading to the pier.  The bench mark is crimped to a stainless steel rod
driven 52 feet (16 m) to refusal, and encased in PVC pipe and concrete
kickblock.



                         BENCH MARK STAMPING:  0560 L 1988

MONUMENTATION:           Survey Disk                               VM#:      263
AGENCY:                                                            PID:         
SETTING CLASSIFICATION:  Stainless Steel Rod


The bench mark is at the southern end of the Rough Riders condominium complex
property, 105 feet (32 m) NE of a fire hydrant, 83.3 feet (25.4 m) SW of the SW
corner of model condominium No. 109, and 1.6 feet (0.5 m) east of a north-south
walkway parallel with condominium No. 111.  The bench mark is level with the
ground, crimped to a stainless steel rod riven 48 feet (15 m) to refusal, and
encased in PVC pipe and concrete kickblock.

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

                                                   PUBLICATION DATE:  12/12/1989
Station ID: 8510560                                SUPERCEDED DATE:   04/21/2003
Name:       MONTAUK, FORT POND BAY                            
            NEW YORK
NOAA Chart: 13209                                  Latitude:         41°  2.9' N
USGS Quad:  MONTAUK POINT                          Longitude:        71° 57.6' W


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


                         BENCH MARK STAMPING:  0560 M 1988

MONUMENTATION:           Survey Disk                               VM#:      264
AGENCY:                                                            PID:         
SETTING CLASSIFICATION:  Concrete Loading Dock


The bench mark is set in the southern corner of the concrete loading dock of
Duryea's Seafood, 15.0 feet (4.6 m) west of the centerline of Fleming Road, 14.2
feet (4.3 m) NE of the south end of a building, 6.2 feet (1.9 m) east of a
building on the west side of Fleming Road, and 1.7 feet (0.5 m) above the
ground.

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

                                                   PUBLICATION DATE:  12/12/1989
Station ID: 8510560                                SUPERCEDED DATE:   04/21/2003
Name:       MONTAUK, FORT POND BAY                            
            NEW YORK
NOAA Chart: 13209                                  Latitude:         41°  2.9' N
USGS Quad:  MONTAUK POINT                          Longitude:        71° 57.6' W


                            T I D A L   D A T U M S 


Tidal datums at MONTAUK, FORT POND BAY based on:

     LENGTH OF SERIES:      17 YEARS
     TIME PERIOD:           1960-1978
     TIDAL EPOCH:           1960-1978
     CONTROL TIDE STATION:   


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

     HIGHEST OBSERVED WATER LEVEL (08/31/1954)         =   8.70
     MEAN HIGHER HIGH WATER                     MHHW   =   2.59
     MEAN HIGH WATER                            MHW    =   2.31
     MEAN TIDE LEVEL                            MTL    =   1.24
     MEAN LOW WATER                             MLW    =   0.18
     MEAN LOWER LOW WATER                       MLLW   =   0.00
     LOWEST  OBSERVED WATER LEVEL (02/02/1976)         =  -3.54

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In FEET above:

     Stamping or Designation                    MLLW        MHW

     0560 J 1977                                 8.25      5.94
     NO 8 1947                                   6.95      4.64
     0560 K 1988                                 5.99      3.68
     0560 L 1988                                 6.11      3.80
     0560 M 1988                                 7.34      5.03


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

                                                   PUBLICATION DATE:  12/12/1989
Station ID: 8510560                                SUPERCEDED DATE:   04/21/2003
Name:       MONTAUK, FORT POND BAY                            
            NEW YORK
NOAA Chart: 13209                                  Latitude:         41°  2.9' N
USGS Quad:  MONTAUK POINT                          Longitude:        71° 57.6' 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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