U.S. DEPARTMENT OF COMMERCE
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National Ocean Service
Datums Page Page 1 of 8
Station ID: 8517847 PUBLICATION DATE: 05/04/2005
Name: BROOKLYN BRIDGE, EAST RIVER
NY
NOAA Chart: 12335 Latitude: 40° 42.2' N ( 40.70330)
USGS Quad: BROOKLYN Longitude: 73° 59.7' W ( -73.99500)
To reach the tidal bench marks from Interstate I-278 (Brooklyn Queens
Expressway) in Brooklyn, take exit # 29B west off of I-278 and follow to Cadman
Plaza West NW to Water Street, then turn right (NE) on to Water Street and turn
left immediately into the valet entrance for River Cafe Restaurant, proceed NW
and then NE ashort distance to a wrought iron gate at the entrance to the Fulton
Ferry Esplanade, a public park facility open daily from 9 am to 9 pm. The bench
marks are located in and around the park property, and to the SE along the
bridge piers and approaches. The gauge was located on the south side of the
bridge, east edge of the river, at the SW corner of the park area, attached to
the face of the bulkhead adjacent to the facility.
T I D A L B E N C H M A R K S
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 8
Station ID: 8517847 PUBLICATION DATE: 05/04/2005
Name: BROOKLYN BRIDGE, EAST RIVER
NY
NOAA Chart: 12335 Latitude: 40° 42.2' N ( 40.70330)
USGS Quad: BROOKLYN Longitude: 73° 59.7' W ( -73.99500)
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: G 44 1934
DESIGNATION: G 44
MONUMENTATION: Bench Mark disk VM#: 16340
AGENCY: National Geodetic Survey (NGS) IDB PID#: KU1773
SETTING CLASSIFICATION: Concrete pier OPUS PID:
LATITUDE: 40° 42.1' N ( 40.70170) LONGITUDE: 73° 59.3' W ( -73.98830)
The primary bench mark is a disk set in top of the south corner of the SW end of
the pier which is the first pier of Manhattan Bridge north of York Street, in
the Borough of Brooklyn in New York City, at the intersection of Pearl and York
Street, 21 m (69 ft) north of the north curb of York Street, 7.92 m (26.0 ft)
west of the west curb of Pearl Street, 1.83 m (6.0 ft) west of a fence line, and
1.52 m (5.0 ft) above the sidewalk.
BENCH MARK STAMPING:
DESIGNATION: 448
MONUMENTATION: Chiseled Square VM#: 16341
AGENCY: Unknown IDB PID#: KU1768
SETTING CLASSIFICATION: Concrete pier OPUS PID:
LATITUDE: 40° 42.1' N ( 40.70170) LONGITUDE: 73° 59.4' W ( -73.99000)
The bench mark is a disk set on top of the 5-inch shelf at the top of the first
course of masonry of the large masonry pier of the Brooklyn Bridge, in the
Borough of Brooklyn in New York City, along the main street near the
intersection of Prospect Street, 14.63 m (48.0 ft) north of the north curb of
Main Street, 1.01 m (3.3 ft) south of the NW corner of the pier, 0.70 m (2.3 ft)
above the sidewalk, and directly below letters BM cut in stone.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 8
Station ID: 8517847 PUBLICATION DATE: 05/04/2005
Name: BROOKLYN BRIDGE, EAST RIVER
NY
NOAA Chart: 12335 Latitude: 40° 42.2' N ( 40.70330)
USGS Quad: BROOKLYN Longitude: 73° 59.7' W ( -73.99500)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 7847 A 2000
DESIGNATION: 851 7847 A
MONUMENTATION: Tidal Station disk VM#: 16342
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete foundation OPUS PID:
LATITUDE: 40° 42.1' N ( 40.70170) LONGITUDE: 73° 59.4' W ( -73.99000)
The bench mark is a disk set in top of a concrete foundation for a fence along
the SW edge of the Fulton Ferry Esplanade under the east end of the Brooklyn
Bridge on the east bank of the East River in the Borough of Brooklyn in New York
City, 13.40 m (44.0 ft) west of the SW corner of the first pier of the Brooklyn
Bridge east of the East River, 6.40 m (21.0 ft) south of a 12-inch diameter
bollard at the edge of the bulkhead, 0.10 m (0.3 ft) SE of the NW end of the
0.61 m (2.0 ft) wide fence foundation, and 0.20 m (0.7 ft) above the cobblestone
surface of the Esplanade area.
BENCH MARK STAMPING: 7847 B 2000
DESIGNATION: 851 7847 B
MONUMENTATION: Tidal Station disk VM#: 16343
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete cap for a bulkhead OPUS PID:
LATITUDE: 40° 42.1' N ( 40.70170) LONGITUDE: 73° 59.4' W ( -73.99000)
The bench mark is a disk set in top of a concrete cap of a bulkhead at the NW
end of New Dock Street at the east bank of the East River on the NE side of the
Fulton Ferry Esplanade at the east end of the Brooklyn Bridge in the Borough of
Brooklyn in New York City, 10.10 m (33.1 ft) north of Power Pole No. 15 (at the
NW end of New Dock Street), 3.30 m (10.8 ft) east of a 0.46 m x 0.69 m (1.5 ft x
2.25 ft) brick column supporting the gate at the NE entrance to the Fulton Ferry
Esplanade, and 0.20 m (0.7 ft) west of the west curb of New Dock Street
extended.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 8
Station ID: 8517847 PUBLICATION DATE: 05/04/2005
Name: BROOKLYN BRIDGE, EAST RIVER
NY
NOAA Chart: 12335 Latitude: 40° 42.2' N ( 40.70330)
USGS Quad: BROOKLYN Longitude: 73° 59.7' W ( -73.99500)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 7847 C 2000
DESIGNATION: 851 7847 C
MONUMENTATION: Tidal Station disk VM#: 16344
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete step OPUS PID:
LATITUDE: 40° 42.1' N ( 40.70170) LONGITUDE: 73° 59.4' W ( -73.99000)
The bench mark is a disk set in top of a concrete step in front of a warehouse
west of the intersection of Main Street and Water Street along the north side of
Water Street, NE and across the street from 66 Water Street in the Borough of
Brooklyn in New York City, 0.90 m (3.0 ft) SW of a siamese fire hydrant
connection in warehouse wall, 0.70 m (2.3 ft) south of the brick face of the
warehouse, 0.20 m (0.7 ft) east of the stone steps measuring 1.83 m (6.0 ft)
wide, and 0.15 m (0.5 ft) above the surface of the sidewalk.
BENCH MARK STAMPING:
DESIGNATION: 851 7847 BBBR 1
MONUMENTATION: Survey disk VM#: 16345
AGENCY: Unknown IDB PID#:
SETTING CLASSIFICATION: Concrete pavement OPUS PID:
LATITUDE: 40° 42.0' N ( 40.70000) LONGITUDE: 73° 59.4' W ( -73.99000)
The bench mark is a disk set in concrete pavement along the pedestrian promenade
of the Brooklyn Bridge, on the east end of the Brooklyn Bridge in the Borough of
Brooklyn in New York City, 61 m (200 ft) NW of the steps from Cadman Plaza East
to the promenade, 4.00 m (13.1 ft) south of an electrical junction box on the NE
edge of the promanade, 3.70 m (12.1 ft) NE of the SW face of a concrete wall on
the SW edge of the promanade, and 1.20 m (3.9 ft) NW of the end post of a steel
fence.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 8
Station ID: 8517847 PUBLICATION DATE: 05/04/2005
Name: BROOKLYN BRIDGE, EAST RIVER
NY
NOAA Chart: 12335 Latitude: 40° 42.2' N ( 40.70330)
USGS Quad: BROOKLYN Longitude: 73° 59.7' W ( -73.99500)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING:
DESIGNATION: 851 7847 BBBR 2
MONUMENTATION: Survey disk VM#: 16346
AGENCY: Unknown IDB PID#:
SETTING CLASSIFICATION: Concrete pavement OPUS PID:
LATITUDE: 40° 42.0' N ( 40.70000) LONGITUDE: 73° 59.4' W ( -73.99000)
The bench mark is a disk set in concrete pavement along the pedestrian promenade
of the Brooklyn Bridge, on the east end of the Brooklyn Bridge in the Borough of
Brooklyn in New York City, 90 m (295 ft) SE of the steps from Cadman Plaza East
to the Promenade, 3.00 m (9.8 ft) NE of the NE face of a concrete wall on the
SW edge of the promanade, 0.70 m (2.7 ft) south of the transition of the fence
to the concrete wall in the center of the promanade, and 0.50 m ( 1.6 ft) SW of
the SW face of the concrete wall at the center of the promanade.
BENCH MARK STAMPING:
DESIGNATION: 851 7847 MBBR 1
MONUMENTATION: Survey disk VM#: 16347
AGENCY: Unknown IDB PID#:
SETTING CLASSIFICATION: Concrete pavement OPUS PID:
LATITUDE: 40° 41.9' N ( 40.69830) LONGITUDE: 73° 58.9' W ( -73.98170)
The bench mark is a disk set in the concrete sidewalk along the south edge of
Nassau Street, near the east end of the Manhattan Bridge in the Borough of
Brooklyn in New York City, 52.00 m (170.6 ft) east of the east curb of Gold
Street, 7.50 m (24.6 ft) WNW of the outside corner of a steel fence, 0.70 m (2.3
ft) east of the eastern most of two steel bollards protecting a fire hydrant,
and 0.40 m (1.3 ft) south of the south edge of Nassau Street.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 8
Station ID: 8517847 PUBLICATION DATE: 05/04/2005
Name: BROOKLYN BRIDGE, EAST RIVER
NY
NOAA Chart: 12335 Latitude: 40° 42.2' N ( 40.70330)
USGS Quad: BROOKLYN Longitude: 73° 59.7' W ( -73.99500)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING:
DESIGNATION: 851 7847 MBBR 2
MONUMENTATION: Survey disk VM#: 16348
AGENCY: Unknown IDB PID#:
SETTING CLASSIFICATION: Concrete pavement OPUS PID:
LATITUDE: 40° 41.9' N ( 40.69830) LONGITUDE: 73° 59.1' W ( -73.98500)
The bench mark is a disk set in the concrete curb at the NE corner of the
intersection of Flatbush Avenue and Nassau Street near the east end of the
Manhattan Bridge in the Borough of Brooklyn in New York City, 6.70 m (22.0 ft)
SE of a sign post on the east side of Flatbush Avenue, 4.80 m (15.7 ft) WSW of a
sign post on the north side of Nassau Street, and 0.14 m (0.5 ft) north of the
face of the curb at the NE corner of the intersection.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 7 of 8
Station ID: 8517847 PUBLICATION DATE: 05/04/2005
Name: BROOKLYN BRIDGE, EAST RIVER
NY
NOAA Chart: 12335 Latitude: 40° 42.2' N ( 40.70330)
USGS Quad: BROOKLYN Longitude: 73° 59.7' W ( -73.99500)
T I D A L D A T U M S
Tidal datums at BROOKLYN BRIDGE, EAST RIVER based on:
LENGTH OF SERIES: 2 MONTHS
TIME PERIOD: November 2000 - December 2000
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION: 8519483 BERGEN POINT WEST REACH, KILL VAN KULL
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
MEAN HIGHER HIGH WATER MHHW = 1.550
MEAN HIGH WATER MHW = 1.436
North American Vertical Datum NAVD88 = 0.890
MEAN SEA LEVEL MSL = 0.780
MEAN TIDE LEVEL MTL = 0.749
MEAN LOW WATER MLW = 0.061
MEAN LOWER LOW WATER MLLW = 0.000
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
G 44 1934 11.789 10.354
448 14.944 13.508
7847 A 2000 3.273 1.838
7847 B 2000 3.336 1.900
7847 C 2000 3.774 2.338
851 7847 BBBR 1 24.327 22.891
851 7847 BBBR 2 24.776 23.340
851 7847 MBBR 1 7.421 5.985
851 7847 MBBR 2 19.517 18.082
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 8 of 8
Station ID: 8517847 PUBLICATION DATE: 05/04/2005
Name: BROOKLYN BRIDGE, EAST RIVER
NY
NOAA Chart: 12335 Latitude: 40° 42.2' N ( 40.70330)
USGS Quad: BROOKLYN Longitude: 73° 59.7' W ( -73.99500)
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.