U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 5
PUBLICATION DATE: 08/28/1991
Station ID: 8518091 SUPERCEDED DATE: 04/21/2003
Name: RYE BEACH (PLAYLAND AUMUSEMENT PARK), LONG ISLAND
NEW YORK
NOAA Chart: 12367 Latitude: 40° 57.7' N
USGS Quad: MAMARONECK Longitude: 73° 40.4' W
To reach the tidal bench marks from Interstate Highway 95 at Playland Parkway
(Exit 19), proceed SE to the end of the parkway, then turn left onto Old Rye
Beach Avenue and go to Playland Administration Building. The bench marks are
along Old Rye Beach Avenue and SE of Playland Administration Building. The tide
gauge and staff were on the pier about 1000 feet (305 m) SE of Playland
Administration Building.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: NO 4 1957
MONUMENTATION: Survey Disk VM#: 2344
AGENCY: PID#: KU1753
SETTING CLASSIFICATION: Concrete Sea Wall
The bench mark is set flush in the top of the concrete sea wall at the NE end of
the pier, 51 feet (16 m) ESE of Bench Mark NO STAMPING 1, 44.5 feet (13.6 m) SE
of the stone slab retaining wall for the restaurant terrace, 6 feet (2 m) north
of the south end of the sea wall and the NW end of the pier, 1.5 feet (0.5 m)
from the west edge of the sea wall, and level with the boardwalk.
BENCH MARK STAMPING: NO 5 1957
MONUMENTATION: Survey Disk VM#: 2345
AGENCY: PID#: KU1751
SETTING CLASSIFICATION: Small Foundation
The bench mark is set flush in the top of the SW corner of the concrete basement
grating on the SW corner of Casino Restaurant, 43 feet (13 m) east of the
seawall, 42 feet (13 m) south of the NW corner of the restaurant, and 2 feet (1
m) west of the building.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 5
PUBLICATION DATE: 08/28/1991
Station ID: 8518091 SUPERCEDED DATE: 04/21/2003
Name: RYE BEACH (PLAYLAND AUMUSEMENT PARK), LONG ISLAND
NEW YORK
NOAA Chart: 12367 Latitude: 40° 57.7' N
USGS Quad: MAMARONECK Longitude: 73° 40.4' W
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: NO 6 1957
MONUMENTATION: Survey Disk VM#: 2346
AGENCY: PID#: KU1750
SETTING CLASSIFICATION: Small Foundation
The bench mark is set in a small concrete apron of a foundation on the south
side of Playland Administration Building, 50 feet (15 m) NE of the NE edge of
the boardwalk, 30 feet (9 m) NE of a fire hydrant, 21 feet (6 m) east of a phone
booth, 15.5 feet (4.7 m) north of the south edge of an asphalt walk, and 10
feet (3 m) west of the center of the SE door of the building.
BENCH MARK STAMPING: 8091 A 1988
MONUMENTATION: Survey Disk VM#: 2347
AGENCY: PID#: AB3868
SETTING CLASSIFICATION: Granite Bedrock
The bench mark is set in a bedrock outcropping, 254 feet (77 m) east of the
flagpost located at the foot of Playland Parkway, 120 feet (37 m) NNE of a fire
hydrant, 108 feet (33 m) WSW of a street lightpost, 39.0 feet (11.9 m) NW of the
centerline of Old Rye Beach Avenue, 9.2 feet (2.8 m) NW of the curb, and 2.5
feet (0.8 m) above the street.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 5
PUBLICATION DATE: 08/28/1991
Station ID: 8518091 SUPERCEDED DATE: 04/21/2003
Name: RYE BEACH (PLAYLAND AUMUSEMENT PARK), LONG ISLAND
NEW YORK
NOAA Chart: 12367 Latitude: 40° 57.7' N
USGS Quad: MAMARONECK Longitude: 73° 40.4' W
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: NO STAMPING 1
MONUMENTATION: Survey Disk VM#: 2348
AGENCY: PID#: KU1752
SETTING CLASSIFICATION: Stone Slab Wall
The primary bench mark is a 2-inch cross carved deep on the face of a stone slab
which is the smallest of a row of slabs that constitute the upper layer of the
retaining wall at the center of the curved portion of the wall, about 576 feet
(176 m) SE along the boardwalk from Playland Administration Building, 57 feet
(17 m) NW of the end of the pier shed, 48.5 feet (14.8 m) NE of a sea wall, and
3 feet (1 m) above the boardwalk. Note: The bench mark has historically been
designated No 3 1930.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 5
PUBLICATION DATE: 08/28/1991
Station ID: 8518091 SUPERCEDED DATE: 04/21/2003
Name: RYE BEACH (PLAYLAND AUMUSEMENT PARK), LONG ISLAND
NEW YORK
NOAA Chart: 12367 Latitude: 40° 57.7' N
USGS Quad: MAMARONECK Longitude: 73° 40.4' W
T I D A L D A T U M S
Tidal datums at RYE BEACH (PLAYLAND AUMUSEMENT PARK), LONG ISLAND based on:
LENGTH OF SERIES: 11 MONTHS
TIME PERIOD: APRIL 1988-FEBRUARY 1989
TIDAL EPOCH: 1960-1978
CONTROL TIDE STATION: 8516990 WILLETS POINT
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in FEET:
HIGHEST OBSERVED WATER LEVEL (10/22/1988) = 11.03
MEAN HIGHER HIGH WATER MHHW = 7.89
MEAN HIGH WATER MHW = 7.53
MEAN TIDE LEVEL MTL = 3.88
* NATIONAL GEODETIC VERTICAL DATUM NGVD29 = 3.18
MEAN LOW WATER MLW = 0.24
MEAN LOWER LOW WATER MLLW = 0.00
LOWEST OBSERVED WATER LEVEL (02/09/1989) = -2.61
* NGVD reference based on elevations published in Quad 400734, 1968, and NOS
leveling of 1989.
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In FEET above:
Stamping or Designation MLLW MHW
NO 4 1957 15.12 7.59
NO 5 1957 15.01 7.48
NO 6 1957 14.72 7.19
8091 A 1988 28.98 21.45
NO STAMPING 1 18.19 10.66
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 5
PUBLICATION DATE: 08/28/1991
Station ID: 8518091 SUPERCEDED DATE: 04/21/2003
Name: RYE BEACH (PLAYLAND AUMUSEMENT PARK), LONG ISLAND
NEW YORK
NOAA Chart: 12367 Latitude: 40° 57.7' N
USGS Quad: MAMARONECK Longitude: 73° 40.4' 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.