U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 8
Station ID: 8510560 PUBLICATION DATE: 11/19/2012
Name: MONTAUK, FORT POND BAY
NY
NOAA Chart: 13209 Latitude: 41° 2.9' N ( 41.04830)
USGS Quad: MONTAUK POINT Longitude: 71° 57.6' W ( -71.96000)
To reach the tidal bench marks from the traffic circle in Montauk, proceed north
on Edgemont Road (State Highway 49) for 1.9 km (1.2 mi) 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
DESIGNATION: 851 0560 J
MONUMENTATION: Tidal Station disk VM#: 261
AGENCY: National Ocean Survey (NOS) IDB PID#: AH6725
SETTING CLASSIFICATION: Stainless steel rod OPUS PID:
LATITUDE: 41° 2.8' N ( 41.04728) LONGITUDE: 71° 57.5' W ( -71.95778)
The primary bench mark is a disk located at the foot of the Rough Riders Fishing
Pier, 4.36 m (14.3 ft) south of the shoreward end of the pier, 3.57 m (11.7 ft)
west of the centerline of the pier, and 0.3 m (1 ft) west of the west edge of
the access road to the pier. The bench mark is crimped to a stainless steel rod
driven 12.80 m (42 ft) to refusal, and encased in a 4-inch PVC pipe with
concrete kickblock. Note - The sleeve depth does not meet the specifications for
a Class A rod mark.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 8
Station ID: 8510560 PUBLICATION DATE: 11/19/2012
Name: MONTAUK, FORT POND BAY
NY
NOAA Chart: 13209 Latitude: 41° 2.9' N ( 41.04830)
USGS Quad: MONTAUK POINT Longitude: 71° 57.6' W ( -71.96000)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: NO 8 1947
DESIGNATION: TIDAL 8 STA 2 50
MONUMENTATION: Tidal Station disk VM#: 260
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: LW0832
SETTING CLASSIFICATION: Concrete manhole rim OPUS PID#: LW0832
LATITUDE: 41° 2.9' N ( 41.04764) LONGITUDE: 71° 57.5' W ( -71.95764)
The bench mark is a disk in the concrete rim surrounding a manhole located NE of
the fishing pier, 59.74 m (196.0 ft) SW of the west edge of a north-south wood
walkway leading to the beach, 34.44 m (113.0 ft) NE of the centerline of the
road leading to the pier, and 6.89 m (22.6 ft) NW of the north edge of an
east-west wood walkway at the back of the condominiums east of the pier.
BENCH MARK STAMPING: 0560 K 1988
DESIGNATION: 851 0560 K
MONUMENTATION: Tidal Station disk VM#: 262
AGENCY: National Ocean Service (NOS) IDB PID#: AH6726
SETTING CLASSIFICATION: Stainless steel rod OPUS PID#: AH6726
LATITUDE: 41° 2.8' N ( 41.04681) LONGITUDE: 71° 57.4' W ( -71.95750)
The bench mark is a disk located at the SW corner of the parking lot at the foot
of the fishing pier, 53.34 m (175.0 ft) SSE of the SE corner of a small wooden
building at the end of the pier, 35.14 m (115.3 ft) north of a wooden walkway
behind the southernmost condominium building, 33.95 m (111.4 ft) SW of the
centerline of the access road leading to the pier, and 5.79 m (19.0 ft) south of
the southernmost 0.25 m (0.8 ft) diameter post at the southern corner of the
parking lot. The bench mark is crimped to a stainless steel rod driven 15.8 m
(52 ft) to refusal, and encased in a 6-inch PVC pipe with concrete kickblock.
Note - The sleeve depth does not meet the specifications for a Class A rod mark.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 8
Station ID: 8510560 PUBLICATION DATE: 11/19/2012
Name: MONTAUK, FORT POND BAY
NY
NOAA Chart: 13209 Latitude: 41° 2.9' N ( 41.04830)
USGS Quad: MONTAUK POINT Longitude: 71° 57.6' W ( -71.96000)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 0560 L 1988
DESIGNATION: 851 0560 L
MONUMENTATION: Tidal Station disk VM#: 263
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Stainless steel rod OPUS PID:
LATITUDE: 41° 3.0' N ( 41.04917) LONGITUDE: 71° 57.6' W ( -71.95944)
The bench mark is a disk located at the southern end of the condominium
property, 32.0 m (105 ft) NE of a fire hydrant, 25.39 m (83.3 ft) SW of the SW
corner of model condominium 109, and 0.49 m (1.6 ft) east of a north-south
walkway parallel with condominium 111. The bench mark is crimped to a stainless
steel rod driven 14.6 m (48 ft) to refusal, and encased in a 6-inch PVC pipe
with concrete kickblock. Note - The sleeve depth does not meet the
specifications for a Class A rod mark.
BENCH MARK STAMPING: 0560 M 1988
DESIGNATION: 851 0560 M
MONUMENTATION: Tidal Station disk VM#: 264
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete loading dock OPUS PID:
LATITUDE: 41° 3.0' N ( 41.04917) LONGITUDE: 71° 57.6' W ( -71.95944)
The bench mark is a disk located in the southern corner of the concrete loading
dock of Duryea's Seafood Market and Restaurant, 4.57 m (15.0 ft) west of the
centerline of Fleming Road, 4.33 m (14.2 ft) NE of the south end of the
restaurant, 1.89 m (6.2 ft) east of a building on the west side of Fleming Road,
and 0.52 m (1.7 ft) above ground.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 8
Station ID: 8510560 PUBLICATION DATE: 11/19/2012
Name: MONTAUK, FORT POND BAY
NY
NOAA Chart: 13209 Latitude: 41° 2.9' N ( 41.04830)
USGS Quad: MONTAUK POINT Longitude: 71° 57.6' W ( -71.96000)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: NO 9 1947
DESIGNATION: TIDAL 9 STA 2 50
MONUMENTATION: Bench Mark disk VM#: 265
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: LW0831
SETTING CLASSIFICATION: Concrete manhole rim OPUS PID:
LATITUDE: 41° 2.8' N ( 41.04694) LONGITUDE: 71° 57.4' W ( -71.95722)
The bench mark is a disk located on the north side of the concrete rim
surrounding manhole number 15 covered by a small spruce tree and bushes, 43.0 m
(141 ft) north of the north edge of the beach, 30.50 m (100.1 ft) east of a
north-south wood walkway leading to the beach, 30.4 m (99.74 ft) south of an
east-west wood walkway at the back of the condominiums east of the fishing pier,
and 0.15 m (0.5 ft) above ground.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 8
Station ID: 8510560 PUBLICATION DATE: 11/19/2012
Name: MONTAUK, FORT POND BAY
NY
NOAA Chart: 13209 Latitude: 41° 2.9' N ( 41.04830)
USGS Quad: MONTAUK POINT Longitude: 71° 57.6' W ( -71.96000)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING:
DESIGNATION: TIDAL 4 STA 2 50
MONUMENTATION: Drill Hole VM#: 273
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: LW0833
SETTING CLASSIFICATION: Granite boulder OPUS PID:
LATITUDE: 41° 3.1' N ( 41.05139) LONGITUDE: 71° 57.4' W ( -71.95722)
The bench mark is a 1-inch drill hole in the center of a 0.3 m (1.0 ft) chiseled
circle on top of a granite boulder located on the property of 66 Fleming Road,
17.07 m (56.0 ft) east of the centerline of Fleming Road, 7.16 m (23.5 ft )
south of the walkway to the house, 4.21 m (13.8 ft) SW of the SW corner of the
house, and 2.4 ft (0.7 m) above ground.
BENCH MARK STAMPING: 0560 N 1993
DESIGNATION: 851 0560 N
MONUMENTATION: Tidal Station disk VM#: 13810
AGENCY: National Ocean Service (NOS) IDB PID#: AH6727
SETTING CLASSIFICATION: Stainless steel rod OPUS PID:
LATITUDE: 41° 3.0' N ( 41.04944) LONGITUDE: 71° 57.6' W ( -71.95944)
The bench mark is a disk located in the approximate center of the condominium
property, 45.11 m (148.0 ft) NW of the NW face of the tennis courts, 24.69 m
(81.0 ft) ENE of the manhole cover in front of Condominium 97, 1.52 m (5.0 ft)
NE of the edge of the road, and 1.20 m (3.9 ft) NW of the NW end of a metal bike
rack. The bench mark is 0.15 m (0.5 ft) below ground, crimped to a stainless
steel rod driven 6.1 m (20 ft) to refusal, and encased in a 4-inch PVC pipe.
Note - The sleeve depth does not meet the specifications for a Class A rod mark.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 8
Station ID: 8510560 PUBLICATION DATE: 11/19/2012
Name: MONTAUK, FORT POND BAY
NY
NOAA Chart: 13209 Latitude: 41° 2.9' N ( 41.04830)
USGS Quad: MONTAUK POINT Longitude: 71° 57.6' W ( -71.96000)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 0560 P 1993
DESIGNATION: 851 0560 P
MONUMENTATION: Tidal Station disk VM#: 13811
AGENCY: National Ocean Service (NOS) IDB PID#: AH6728
SETTING CLASSIFICATION: Stainless steel rod OPUS PID:
LATITUDE: 41° 3.0' N ( 41.04917) LONGITUDE: 71° 57.6' W ( -71.95944)
The bench mark is a disk located on the SE side of the main entrance road to the
condominiums, 29.17 m (95.7 ft) east of the NE corner of the tennis courts,
22.56 m (74.0 ft) SE of the manhole cover in front of Building 4, 2.10 m (6.9
ft) SE of the edge of the road, and 1.55 m (5.1 ft) SW of fire hydrant number
284. The bench mark is crimped to a stainless steel rod driven 15.2 m (50 ft)
to refusal, and encased in a 4-inch PVC pipe with concrete kickblock. Note - The
sleeve depth does not meet the specifications for a Class A rod mark.
BENCH MARK STAMPING: NO 6 1943
MONUMENTATION: Tidal Station disk VM#: 15507
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: LW0837
SETTING CLASSIFICATION: In a boulder OPUS PID:
LATITUDE: 41° 3.2' N ( 41.05306) LONGITUDE: 71° 57.5' W ( -71.95806)
The bench mark is a disk located on the east shore of Fort Pond Bay in the top
of a large granite boulder with an iron bar projecting from it, 205.7 M (675 FT)
north along the beach from the Duryea's fish pier, 91.4 m (300 ft) SW of the
Montauket hotel, and 38.1 m(125 ft ) west of a small white house.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 7 of 8
Station ID: 8510560 PUBLICATION DATE: 11/19/2012
Name: MONTAUK, FORT POND BAY
NY
NOAA Chart: 13209 Latitude: 41° 2.9' N ( 41.04830)
USGS Quad: MONTAUK POINT Longitude: 71° 57.6' W ( -71.96000)
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: 1/1/1983 - 12/31/1992 and 1/1/1994 - 12/31/2000
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION:
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
HIGHEST OBSERVED WATER LEVEL (08/31/1954) = 2.572
MEAN HIGHER HIGH WATER MHHW = 0.770
MEAN HIGH WATER MHW = 0.683
North American Vertical Datum NAVD88 = 0.478
MEAN SEA LEVEL MSL = 0.377
MEAN TIDE LEVEL MTL = 0.368
MEAN LOW WATER MLW = 0.052
MEAN LOWER LOW WATER MLLW = 0.000
LOWEST OBSERVED WATER LEVEL (02/02/1976) = -1.153
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
0560 J 1977 2.441 1.758
NO 8 1947 2.047 1.364
0560 K 1988 1.759 1.076
0560 L 1988 1.803 1.120
0560 M 1988 2.176 1.493
NO 9 1947 2.276 1.593
TIDAL 4 STA 2 50 6.280 5.597
0560 N 1993 1.701 1.018
0560 P 1993 1.738 1.055
NO 6 1943 2.019 1.336
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 8 of 8
Station ID: 8510560 PUBLICATION DATE: 11/19/2012
Name: MONTAUK, FORT POND BAY
NY
NOAA Chart: 13209 Latitude: 41° 2.9' N ( 41.04830)
USGS Quad: MONTAUK POINT Longitude: 71° 57.6' W ( -71.96000)
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.