U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 5
Station ID: 8514322 PUBLICATION DATE: 05/01/2003
Name: PATCHOGUE, PATCHOGUE RIVER
NY
NOAA Chart: 12353 Latitude: 40° 45.0' N ( 40.75000)
USGS Quad: PATCHOGUE Longitude: 73° 0.0' W ( -73.00000)
To reach the tidal bench marks from the intersection of West Main Street
(Montauk Highway) and River Avenue in Patchogue, proceed south on River Avenue
for 1.8 km (1.1 mi), then turn left on Price Street and go 0.3 km (0.2 mi) to
River Point Marine. The bench marks are located near the marina and along the
River Avenue. The tide gauge and staff were near the inside corner of the main
marina pier.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 4322 A 1989
DESIGNATION: 851 4322 A
MONUMENTATION: Tidal Station disk VM#: 4862
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete sea wall OPUS PID:
LATITUDE: 40° 45.0' N ( 40.75000) LONGITUDE: 73° 1.0' W ( -73.01670)
The primary bench mark is a disk set flush in the top of the concrete sea wall
at River Point Marine, beneath the wood deck along the waterfront, 40.84 m (134
ft) north of the 1.83 m (6 ft) high wooden fence on the south side of the
marina, 37.49 m (123 ft) south of a 12.19 m (40 ft) high wooden pole near the
marina snack bar, 1.95 m (6.4 ft) west of the east edge of the deck, and 0.55 m
(1.8 ft) east of the west edge of the deck.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 5
Station ID: 8514322 PUBLICATION DATE: 05/01/2003
Name: PATCHOGUE, PATCHOGUE RIVER
NY
NOAA Chart: 12353 Latitude: 40° 45.0' N ( 40.75000)
USGS Quad: PATCHOGUE Longitude: 73° 0.0' W ( -73.00000)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 4322 B 1989
DESIGNATION: 851 4322 B
MONUMENTATION: Tidal Station disk VM#: 4863
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete sea wall OPUS PID#: BBDJ34
LATITUDE: ' °deg (0) LONGITUDE: ' °deg (0)
The bench mark is a disk set flush in the top of the concrete sea wall south of
River Point Marine, beneath the wood deck along the waterfront at #37 Mapes
Avenue, 23.59 m (77.4 ft) SE of the NE corner of the house, 10.76 m (35.3 ft) SE
of the SE corner of the house, 2.90 m (9.5 ft) west of the east side of the
deck, and 0.15 m (0.5 ft) east of the west side.
BENCH MARK STAMPING: 4322 C 1989
DESIGNATION: 851 4322 C
MONUMENTATION: Tidal Station disk VM#: 4864
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Stainless steel rod OPUS PID:
LATITUDE: ' °deg (0) LONGITUDE: ' °deg (0)
The bench mark is a disk located 0.2 km (0.1 mi) west of River Point Marine on
Price Street, at the intersection of Price Street and the entrance to Fairfield
on the Bay (condos), 14 m (46 ft) east of a water meter in the street, 9.57 m
(31.4 ft) SW of the SW corner of the residence at #45 Price Street, and 1.22 m
(4.0 ft) NW of power pole #4. The bench mark is set 9 cm (0.3 ft) below ground
level, crimped to a stainless steel rod driven 20.73 m (68 ft) to substantial
resistance, 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: 8514322 PUBLICATION DATE: 05/01/2003
Name: PATCHOGUE, PATCHOGUE RIVER
NY
NOAA Chart: 12353 Latitude: 40° 45.0' N ( 40.75000)
USGS Quad: PATCHOGUE Longitude: 73° 0.0' W ( -73.00000)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 4322 D 1989
DESIGNATION: 851 4322 D
MONUMENTATION: Tidal Station disk VM#: 4865
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Stainless steel rod OPUS PID:
LATITUDE: ' °deg (0) LONGITUDE: ' °deg (0)
The bench mark is a disk located 1.8 km (1.1 mi) south on River Avenue from its
intersection with West Main Street, 17.68 m (58.0 ft) NW of the NW corner of a
house, 14.23 m (46.7 ft) SW of the SW corner of the house at #395 River Avenue,
and 0.64 m (2.1 ft) NE of power pole #46J. The bench mark is set 9 cm (0.3 ft)
below ground level, crimped to a stainless steel rod driven 17 m (56 ft) to
substantial resistance, and encased in a 5-inch PVC pipe and concrete kickblock.
BENCH MARK STAMPING: 4322 E 1989
DESIGNATION: 851 4322 E
MONUMENTATION: Tidal Station disk VM#: 4866
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Stainless steel rod OPUS PID:
LATITUDE: ' °deg (0) LONGITUDE: ' °deg (0)
The bench mark is a disk located at the NE corner of the intersection of River
Avenue and Crescent Street, 12.19 m (40.0 ft) NE of a guide pole on the west
side of River Avenue, 1.83 m (6.0 ft) NE of NYT power pole #43, and 0.79 m (2.6
ft) NW of the corner post of a chain link fence. The bench mark is set 0.12 m
(0.4 ft) below ground level, crimped to a stainless steel rod driven 24 m (78
ft) to substantial resistance, 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: 8514322 PUBLICATION DATE: 05/01/2003
Name: PATCHOGUE, PATCHOGUE RIVER
NY
NOAA Chart: 12353 Latitude: 40° 45.0' N ( 40.75000)
USGS Quad: PATCHOGUE Longitude: 73° 0.0' W ( -73.00000)
T I D A L D A T U M S
Tidal datums at PATCHOGUE, PATCHOGUE RIVER based on:
LENGTH OF SERIES: 1 Year
TIME PERIOD: October 1989 - September 1990
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION: 8518750 THE BATTERY, NEW YORK HARBOR
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
HIGHEST OBSERVED WATER LEVEL (11/16/1989) = 0.901
MEAN HIGHER HIGH WATER MHHW = 0.418
MEAN HIGH WATER MHW = 0.370
MEAN TIDE LEVEL MTL = 0.201
MEAN SEA LEVEL MSL = 0.200
MEAN LOW WATER MLW = 0.031
MEAN LOWER LOW WATER MLLW = 0.000
LOWEST OBSERVED WATER LEVEL (02/21/1990) = -0.398
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
4322 A 1989 0.993 0.623
4322 B 1989 0.975 0.605
4322 C 1989 1.552 1.182
4322 D 1989 1.309 0.939
4322 E 1989 1.258 0.888
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 5
Station ID: 8514322 PUBLICATION DATE: 05/01/2003
Name: PATCHOGUE, PATCHOGUE RIVER
NY
NOAA Chart: 12353 Latitude: 40° 45.0' N ( 40.75000)
USGS Quad: PATCHOGUE Longitude: 73° 0.0' W ( -73.00000)
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.