U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 7
Station ID: 8518962 PUBLICATION DATE: 10/10/2018
Name: TURKEY POINT, HUDSON RIVER
NY
NOAA Chart: 12347 Latitude: 42° 0.8' N ( 42.01390)
USGS Quad: SAUGERTIES Longitude: 73° 56.4' W ( -73.93920)
FROM THE NY-32 EXIT ON US HIGHWAY 199, LAKE KATRINE, NY. PROCEED NORTH ON ROUTE
32 APPROXIMATELY 4 KM (2.5 MI) TO ULSTER LANDING ROAD. TURN RIGHT ON ULSTER
LANDING ROAD AND PROCEED 0.6 KM (0.4 MI) TO FLATBUSH CAMP ROAD. TURN LEFT AND
PROCEED 0.9 KM (0.6 MI) UNTIL A SHARP LEFT IN THE ROAD. PROCEED STRAIGHT TO
TURKEY POINT DRIVE (UNSIGNED) TO A LOCKED GATE/PARKING AREA. OBTAIN GATE
COMBINATION FROM NYSDEC OFFICE IN NEW PALTZ, NY TO OBTAIN VEHICLE ACCESS TO THE
LOWER ROAD. THE ROAD IS ACCESSIBLE BY FOOT, IF NO VEHICLE ACCESS IS AVAILABLE.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: HRNERR 2017 8962A
DESIGNATION: 851 8962 A
ALIAS: 8962A DR
MONUMENTATION: Metal Rod VM#: 22432
AGENCY: NYSDEC IDB PID:
SETTING CLASSIFICATION: Statinless steel rod OPUS PID:
LATITUDE: 42° 0.9' N ( 42.01472) LONGITUDE: 73° 56.4' W ( -73.93942)
The bench mark is located at the end of an access road approximately 1 km (0.6
mi) from an entrance gate. The mark is a stainless steel rod located north of a
parking lot, 22 m (72.2 ft) east of a cliff-face, 20 m (65.6 ft) north from the
NW corner of the parking lot following a foot trail, 20 m (65.6 ft) south of a
rock foundation located north of the parking lot, 1.4 m (4.6 ft) west of the
center line of a marked foot trail. The mark is 11 cm below ground level, driven
2 m to refusal, and encased in a 5-inch PVC pipe with a concrete kick block,
under a drive-over cap.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 7
Station ID: 8518962 PUBLICATION DATE: 10/10/2018
Name: TURKEY POINT, HUDSON RIVER
NY
NOAA Chart: 12347 Latitude: 42° 0.8' N ( 42.01390)
USGS Quad: SAUGERTIES Longitude: 73° 56.4' W ( -73.93920)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: TURKEY POINT NYSDEC-HRNERR
LEVELING PT 8962B
DESIGNATION: 851 8962 B
ALIAS: 8962B
MONUMENTATION: Tidal Station disk VM#: 22433
AGENCY: NYSDEC IDB PID:
SETTING CLASSIFICATION: Dock OPUS PID:
LATITUDE: 42° 0.8' N ( 42.01414) LONGITUDE: 73° 56.4' W ( -73.93920)
The bench mark is located on the concrete wharf at the end of the access road, 1
km (0.6 mi) from the entrance gate. The mark is a disk located 47 m (154.2 ft)
south of the north bulkhead, 31 m (101.7 ft) SE of the southeastern corner of an
adjacent parking lot, 11 m (36.1 ft) north of the center of a navigational tower
(enclosed by fence), 3 m (9.8 ft) west of the eastern bulkhead. The mark is a 2
inch (5 cm) round aluminum marking disk on the deck of the wharf with a raised
high point.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 7
Station ID: 8518962 PUBLICATION DATE: 10/10/2018
Name: TURKEY POINT, HUDSON RIVER
NY
NOAA Chart: 12347 Latitude: 42° 0.8' N ( 42.01390)
USGS Quad: SAUGERTIES Longitude: 73° 56.4' W ( -73.93920)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: NYSDEC TURK 3 2014
DESIGNATION: 851 8962 C
ALIAS: TURK3
MONUMENTATION: Tidal Station disk VM#: 22434
AGENCY: NYSDEC IDB PID:
SETTING CLASSIFICATION: Culvert OPUS PID:
LATITUDE: 42° 0.8' N ( 42.01399) LONGITUDE: 73° 56.4' W ( -73.94000)
The bench mark is located along an access road, 0.925 km (0.6 mi) from an
entrance gate. The mark is a disk located on a culvert, 61 m (200.1 ft) NE of a
hairpin turn, 21 m (68.9 ft) SW of the southwest corner of a parking lot at the
end of the road, 2 m (6.6 ft) east of the centerline of the roadway, and .25 m
(0.8 ft) east of a guardrail. The mark is set flush on the southern wing of the
SE oriented culvert and is a 9 cm (3.5 inch) aluminum disk.
BENCH MARK STAMPING: TURKEY POINT NYSDEC-HRNERR 8962D
DESIGNATION: 851 8962 D
MONUMENTATION: Tidal Station disk VM#: 22435
AGENCY: NYSDEC IDB PID:
SETTING CLASSIFICATION: Disk set in concrete OPUS PID:
LATITUDE: 42° 0.8' N ( 42.01362) LONGITUDE: 73° 56.4' W ( -73.94050)
The bench mark is located along an access road, 0.85 km (0.528 mi) from an
entrance gate. The mark is a disk located on a concrete footing, 170 m (560 ft)
south of the second access gate, 20 m (65.6 ft) north of a hairpin turn, 2.8 m
(9.2 ft) east of the centerline of the roadway. It is a 3 inch (8 cm) aluminum
disk set flush in the southern portion of a concrete footing, observable from
the roadway.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 7
Station ID: 8518962 PUBLICATION DATE: 10/10/2018
Name: TURKEY POINT, HUDSON RIVER
NY
NOAA Chart: 12347 Latitude: 42° 0.8' N ( 42.01390)
USGS Quad: SAUGERTIES Longitude: 73° 56.4' W ( -73.93920)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: HRNERR 2017 8962 E
DESIGNATION: 851 8962 E
ALIAS: 8962E DR
MONUMENTATION: Metal Rod VM#: 22436
AGENCY: NYSDEC IDB PID:
SETTING CLASSIFICATION: Stainless steel rod OPUS PID:
LATITUDE: 42° 0.9' N ( 42.01522) LONGITUDE: 73° 56.4' W ( -73.94048)
The bench mark is located along an access road, 0.70 km (.434 mi) from the
entrance gate. The mark is a stainless steel rod located 11 m (36.1 ft) from the
centerline of the roadway, 14 m (45.9 ft) NW of the second access gate, 1.5 m
(4.9 ft) SW of the southwest corner of a small parking adjacent to the second
gate. The mark is the rounded top of a driven rod, 14 cm (6 inches) below ground
level, driven 3. M (9.8 ft) to refusal, and encased in a 13 cm (5 inches) PVC
pipe with a concrete kick block, under a drive-over cap.
BENCH MARK STAMPING: HRNERR 2017 8962F
DESIGNATION: 851 8962 F
MONUMENTATION: Metal Rod VM#: 22438
AGENCY: NYSDEC IDB PID:
SETTING CLASSIFICATION: Stainless steel rod OPUS PID:
LATITUDE: 42° 1.0' N ( 42.01594) LONGITUDE: 73° 56.4' W ( -73.94031)
The bench mark is located along the access road .5 km (0.3 mi) from the entrance
gate. The mark is a stainless steel rod located 85 m (278.9 ft) north from
second access gate, 55 m (180.4 ft) south of the western intersection of a
blazed foot trail and the access road, 5 m (16.4 ft) east of the centerline of
the roadway, and is 14 cm (6 inches) below ground, driven 4.9 m (16.1 ft) to
refusal, and encased in a 13 cm (5 inches) PVC pipe with a concrete kick block,
under a drive-over cap.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 7
Station ID: 8518962 PUBLICATION DATE: 10/10/2018
Name: TURKEY POINT, HUDSON RIVER
NY
NOAA Chart: 12347 Latitude: 42° 0.8' N ( 42.01390)
USGS Quad: SAUGERTIES Longitude: 73° 56.4' W ( -73.93920)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: NO STAMPING
DESIGNATION: 851 8962 G
MONUMENTATION: See descriptive text VM#: 22439
AGENCY: NYSDEC IDB PID:
SETTING CLASSIFICATION: Rock outcrop OPUS PID:
LATITUDE: 42° 0.9' N ( 42.01429) LONGITUDE: 73° 56.4' W ( -73.94048)
The bench mark is located along the access road, 0.60 km (0.37 mi) from the
entrance gate. The mark is a horizontal spike located on the western exposed
rock face, 90 m (0.1 mi) north of the hairpin turn, 85 m (278.9 ft) southwest of
the second access gate, 3.5 m (11.5 ft) NW of the centerline of the road, and is
a 10 cm (4 inch) spike 0.3 m above ground, set horizontally in the rock face
using hydraulic cement.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 7
Station ID: 8518962 PUBLICATION DATE: 10/10/2018
Name: TURKEY POINT, HUDSON RIVER
NY
NOAA Chart: 12347 Latitude: 42° 0.8' N ( 42.01390)
USGS Quad: SAUGERTIES Longitude: 73° 56.4' W ( -73.93920)
T I D A L D A T U M S
Tidal datums at TURKEY POINT, HUDSON RIVER based on:
LENGTH OF SERIES: 7 MONTHS
TIME PERIOD: Aug - Nov 2017 and Feb - Apr 2018
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 (03/06/2018) = 2.025
MEAN HIGHER HIGH WATER MHHW = 1.305
MEAN HIGH WATER MHW = 1.204
MEAN SEA LEVEL MSL = 0.661
MEAN TIDE LEVEL MTL = 0.632
MEAN LOW WATER MLW = 0.060
MEAN LOWER LOW WATER MLLW = 0.000
LOWEST OBSERVED WATER LEVEL (12/26/2017) = -0.563
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
HRNERR 2017 8962A 2.340 1.136
TURKEY POINT NYSDEC-HRNERR LEVELING
PT 8962B 1.893 0.689
NYSDEC TURK 3 2014 5.608 4.404
TURKEY POINT NYSDEC-HRNERR 8962D 18.924 17.720
HRNERR 2017 8962 E 38.145 36.941
HRNERR 2017 8962F 40.484 39.280
NO STAMPING 31.503 30.299
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 7 of 7
Station ID: 8518962 PUBLICATION DATE: 10/10/2018
Name: TURKEY POINT, HUDSON RIVER
NY
NOAA Chart: 12347 Latitude: 42° 0.8' N ( 42.01390)
USGS Quad: SAUGERTIES Longitude: 73° 56.4' W ( -73.93920)
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.