U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 5
Station ID: 8514422 PUBLICATION DATE: 05/09/2003
Name: CEDAR BEACH
NY
NOAA Chart: 12362 Latitude: 40° 57.9' N ( 40.96500)
USGS Quad: PORT JEFFERSON Longitude: 73° 2.6' W ( -73.04330)
To reach the tidal bench marks from State Highway 25A and 83 at Mt Sinai,
proceed east on State Highway 25A for 1.9 km (1.2 mi), turn left onto Pipe Stave
Hollow Road and go 3.4 km (2.1 mi) to its end, turn left onto Harbor Beach Road
and go 0.8 km (0.5 mi) to the entrance to Cedar Beach Park, continue through the
parking lot and along the park road for 1.3 km (0.8 mi) to the road's end. The
bench marks are along the park road. The tide gauge and staff were on a fishing
pier in the inlet.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 4422 A 1988
DESIGNATION: 851 4422 A
MONUMENTATION: Tidal Station disk VM#: 7478
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Stainless steel rod OPUS PID:
LATITUDE: 40° 57.9' N ( 40.96500) LONGITUDE: 73° 2.6' W ( -73.04330)
The primary bench mark is a disk set near the foot of a boardwalk leading from
the road to the fishing pier, 44 m (143 ft) NW of power pole #84, 25.76 m (84.5
ft) east of the east face of the fishing pier, 3.84 m (22.6 ft) WSW of a fire
hydrant, 2 m (7.0 ft) north of the centerline of the southernmost boardwalk
leading to the pier, and about 0.3 m (1.0 ft) below the boardwalk. The bench
mark is crimped to a stainless steel rod driven to a depth of 15.8 m (52 ft),
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 2 of 5
Station ID: 8514422 PUBLICATION DATE: 05/09/2003
Name: CEDAR BEACH
NY
NOAA Chart: 12362 Latitude: 40° 57.9' N ( 40.96500)
USGS Quad: PORT JEFFERSON Longitude: 73° 2.6' W ( -73.04330)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 4422 C 1988
DESIGNATION: 851 4422 C
MONUMENTATION: Tidal Station disk VM#: 7479
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Stainless steel rod OPUS PID:
LATITUDE: 40° 57.9' N ( 40.96500) LONGITUDE: 73° 2.6' W ( -73.04330)
The bench mark is a disk set on the north side of the park road near Old Man's
Boatyard, 46 m (151 ft) NW of the western wood post at the Old Man's Boatyard
driveway, 43.59 m (143.0 ft) east of a fire hydrant, 5.18 m (17.0 ft) NW of
power pole #78, and 0.73 m (2.4 ft) WSW of an orange witness post. The bench
mark is 6 cm (0.2 ft) below ground, crimped to a stainless steel rod driven to a
depth of 15.8 m (52 ft), and encased in a 5-inch PVC pipe and concrete
kickblock.
BENCH MARK STAMPING: 4422 D 1988
DESIGNATION: 851 4422 D
MONUMENTATION: Tidal Station disk VM#: 7480
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Stainless steel rod OPUS PID:
LATITUDE: 40° 57.9' N ( 40.96500) LONGITUDE: 73° 2.6' W ( -73.04330)
The bench mark is a disk set on the north side of the park road near Old Man's
Boatyard, 30.69 m (100.7 ft) NE of the centerline of the easternmost gate to Old
Man's Boatyard, 28.50 m (93.5 ft) NW of the NE corner of an 2 m (8 ft) chain
link at the boatyard, 3.60 m (11.8 ft) SW of a witness post, and 0.79 m (2.6 ft)
north of power pole #72. The bench mark is 6 cm (0.2 ft) below the road
surface, crimped to a stainless steel rod driven to a depth of 15.8 m (52 ft),
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
Station ID: 8514422 PUBLICATION DATE: 05/09/2003
Name: CEDAR BEACH
NY
NOAA Chart: 12362 Latitude: 40° 57.9' N ( 40.96500)
USGS Quad: PORT JEFFERSON Longitude: 73° 2.6' W ( -73.04330)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 4422 E 1988
DESIGNATION: 851 4422 E
MONUMENTATION: Tidal Station disk VM#: 7481
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Stainless steel rod OPUS PID:
LATITUDE: 40° 57.9' N ( 40.96500) LONGITUDE: 73° 2.6' W ( -73.04330)
The primary bench mark is a disk set on the west side of the entrance drive to
nature center, 19.39 m (63.6 ft) NW of a fire hydrant, 6.86 m (22.5 ft) west of
the center of the entrance gate of the drive leading to the nature center, and
6.49 m (21.3 ft) north of the centerline of the park road. The bench mark is 6
cm (0.2 ft) below the road, crimped to a stainless steel rod driven to a depth
of 15.8 m (52 ft), 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
Station ID: 8514422 PUBLICATION DATE: 05/09/2003
Name: CEDAR BEACH
NY
NOAA Chart: 12362 Latitude: 40° 57.9' N ( 40.96500)
USGS Quad: PORT JEFFERSON Longitude: 73° 2.6' W ( -73.04330)
T I D A L D A T U M S
Tidal datums at CEDAR BEACH based on:
LENGTH OF SERIES: 4 MONTHS
TIME PERIOD: November 1988 - February 1989
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION: 8514560 PORT JEFFERSON
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
MEAN HIGHER HIGH WATER MHHW = 2.131
MEAN HIGH WATER MHW = 2.033
MEAN TIDE LEVEL MTL = 1.051
MEAN SEA LEVEL MSL = 1.045
MEAN LOW WATER MLW = 0.069
MEAN LOWER LOW WATER MLLW = 0.000
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
4422 A 1988 2.780 0.747
4422 C 1988 5.232 3.199
4422 D 1988 5.400 3.367
4422 E 1988 2.831 0.798
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 5
Station ID: 8514422 PUBLICATION DATE: 05/09/2003
Name: CEDAR BEACH
NY
NOAA Chart: 12362 Latitude: 40° 57.9' N ( 40.96500)
USGS Quad: PORT JEFFERSON Longitude: 73° 2.6' W ( -73.04330)
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.