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National Ocean Service
Datums Page Page 1 of 8
Station ID: 8518699 PUBLICATION DATE: 09/15/2004
Name: WILLIAMSBURG BRIDGE
NY
NOAA Chart: 12335 Latitude: 40° 42.7' N ( 40.71170)
USGS Quad: BROOKLYN Longitude: 73° 58.1' W ( -73.96830)
To reach the tidal bench marks from Brooklyn, New York, take exit # 32 from
I-278 (The Brooklyn Queens Expressway) and follow Metropolitan Avenue west
towards the East River to Kent Avenue, then proceed south on Kent Avenue under
the Williamsburg Bridge to south 6th Street, then turn west into the NYCDOT
maintenance facility. The bench marks are located along Broadway, 6th Street,
Kent Avenue, and under the Williamsburg bridge along the waterfront. The tide
gauge was located on the south side of the bridge at the 3rd pair of bridge
foundation piers west of the east abutment of the bridge, attached to the fender
system of the sheetpile bulkhead surrounding the bridge pier.
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: 8518699 PUBLICATION DATE: 09/15/2004
Name: WILLIAMSBURG BRIDGE
NY
NOAA Chart: 12335 Latitude: 40° 42.7' N ( 40.71170)
USGS Quad: BROOKLYN Longitude: 73° 58.1' W ( -73.96830)
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: G 348 1952
DESIGNATION: G 348
MONUMENTATION: Bench Mark disk VM#: 16291
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: KU1043
SETTING CLASSIFICATION: Abutment OPUS PID:
LATITUDE: 40° 42.7' N ( 40.71170) LONGITUDE: 73° 58.1' W ( -73.96830)
The primary bench mark is a disk set vertically in the NE face (facing South
57th Street) of the granite abutment of the Williamsburg Bridge, at the
intersection of Kent Avenue and South 5th Street, 57 m (187 ft) SE of the SE
curb of Kent Avenue, 12.80 m (42.0 ft) NW of the SE edge of the abutment, 6.10 m
(20.0 ft) SW of the SW curb of 5th Street, 0.58 m (1.9 ft) SE of the buttress
corner of the abutment, 0.76 m (2.5 ft) above South 5th Street, and 0.43 m (1.4
ft) above the ground.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 8
Station ID: 8518699 PUBLICATION DATE: 09/15/2004
Name: WILLIAMSBURG BRIDGE
NY
NOAA Chart: 12335 Latitude: 40° 42.7' N ( 40.71170)
USGS Quad: BROOKLYN Longitude: 73° 58.1' W ( -73.96830)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: H 348 1952
DESIGNATION: H 348
MONUMENTATION: Bench Mark disk VM#: 16301
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: KU1042
SETTING CLASSIFICATION: Granite foundation OPUS PID:
LATITUDE: 40° 42.3' N ( 40.70500) LONGITUDE: 73° 58.1' W ( -73.96830)
The bench mark is a disk set vertically in the east face of the granite
foundation of the brick building of B.M.T. Power Plant, at the intersection of
Kent Avenue and Rush Street, 21.33 m (70.0 ft) north of extended center line of
Rush Street, 3.20 m (10.5 ft) west of west curb of Kent Avenue, 2.74 m (9.0 ft)
north of the SE corner of the building, 0.73 m (2.4 ft) south of the inside
corner formed by steps to an entrance to the building, and 1.07 m (3.5 ft) above
the sidewalk.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 8
Station ID: 8518699 PUBLICATION DATE: 09/15/2004
Name: WILLIAMSBURG BRIDGE
NY
NOAA Chart: 12335 Latitude: 40° 42.7' N ( 40.71170)
USGS Quad: BROOKLYN Longitude: 73° 58.1' W ( -73.96830)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: F 348 1952
DESIGNATION: F 348
MONUMENTATION: Bench Mark disk VM#: 16302
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: KU1044
SETTING CLASSIFICATION: Concrete foundation OPUS PID:
LATITUDE: 40° 43.0' N ( 40.71670) LONGITUDE: 73° 58.0' W ( -73.96670)
The bench mark is a disk set vertically in the NE face of the concrete
foundation of a 1 story brick and glass building of the Domino Sugar Refinery,
at the intersection of Kent Avenue and Grand Street, 5.49 m (18.0 ft) NW of the
NW curb of Kent Avenue, 4.72 m (15.5 ft) SW of the SW curb of Grand Street, 2.13
m (7.0 ft) NW of the east corner of a building, and 0.15 m (0.5 ft) above the
level of the sidewalk of Kent Avenue.
BENCH MARK STAMPING:
DESIGNATION: 851 8699 WBBR 1
MONUMENTATION: Survey disk VM#: 16303
AGENCY: Unknown IDB PID#:
SETTING CLASSIFICATION: Concrete pavement OPUS PID:
LATITUDE: 40° 42.6' N ( 40.71000) LONGITUDE: 73° 57.7' W ( -73.96170)
The bench mark is a disk set in concrete pavement at the intersection of
Broadway and Roebling (and exit ramp from Williamsburg Bridge east bound), in
the easternmost of two concrete traffic islands, 7.53 m (24.7 ft) SSE of a sign
post located at the NW corner of the traffic island, 2.62 m (8.6 ft) NNE of the
concrete curb on the north edge of Broadway, and 2.59 m (8.5 ft) NE of a sign
post located at the SW corner of the traffic island.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 8
Station ID: 8518699 PUBLICATION DATE: 09/15/2004
Name: WILLIAMSBURG BRIDGE
NY
NOAA Chart: 12335 Latitude: 40° 42.7' N ( 40.71170)
USGS Quad: BROOKLYN Longitude: 73° 58.1' W ( -73.96830)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING:
DESIGNATION: 851 8699 WBBR 2
MONUMENTATION: Survey disk VM#: 16304
AGENCY: Unknown IDB PID#:
SETTING CLASSIFICATION: Concrete curb OPUS PID:
LATITUDE: 40° 42.6' N ( 40.71000) LONGITUDE: 73° 57.8' W ( -73.96330)
The bench mark is a disk set in the concrete curb along the north edge of
Broadway, at the NW corner of the intersection of Broadway and Bedford Avenue,
8.87 m (29.1 ft) west of a concrete base for a traffic light, 6.71 m (22.0 ft)
east of the west end of the concrete sidewalk on the north side of Broadway,
6.10 m (20.0 ft) south of the south edge of South 6th Street, 5.18 m (17.0 ft)
SSW of the concrete base of a light pole located at the SW corner of the
intersection of South 6th Street and Bedford Avenue, and about 0.15 m (0.5 ft)
above the level of Broadway.
BENCH MARK STAMPING: 8699 A 2000
DESIGNATION: 851 8699 A
MONUMENTATION: Tidal Station disk VM#: 16305
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete and steel bulkhead OPUS PID:
LATITUDE: 40° 42.7' N ( 40.71170) LONGITUDE: 73° 58.1' W ( -73.96830)
The bench mark is a disk set in top of a concrete and steel sheetpile bulkhead
at the east edge of the East River, at the NYCDOT Maintenance Facility under the
east end of the Williamsburg Bridge, on the south side of the 3rd pair (from the
east end) of granite pier foundations supporting the Williamsburg Bridge, 11.64
m (38.2 ft) NW of the NW corner of the Ironworkers Shop Building, 2.23 m (7.3
ft) south of the south face of the south pier, and 0.24 m (0.8 ft) east of the
west face of the concrete bulkhead cap.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 8
Station ID: 8518699 PUBLICATION DATE: 09/15/2004
Name: WILLIAMSBURG BRIDGE
NY
NOAA Chart: 12335 Latitude: 40° 42.7' N ( 40.71170)
USGS Quad: BROOKLYN Longitude: 73° 58.1' W ( -73.96830)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 8699 B 2000
DESIGNATION: 851 8699 B
MONUMENTATION: Tidal Station disk VM#: 16306
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete and steel bulkhead OPUS PID:
LATITUDE: 40° 42.7' N ( 40.71170) LONGITUDE: 73° 58.1' W ( -73.96830)
The bench mark is a disk set in top of a concrete and steel sheetpile bulkhead
along the east edge of the East River at the north edge of the foot of South 6th
Street, at the NYCDOT Maintenance Facility under the east end of the
Williamsburg Bridge, 8.84 m (29.0 ft) west of the SW corner of the Ironworkers
Shop Building, 1.43 m (4.7 ft) north of the south edge of the concrete bulkhead
cap, and 0.61 m (2.0 ft) east of a chain link fence running along the bulkhead.
BENCH MARK STAMPING: 8699 C 2000
DESIGNATION: 851 8699 C
MONUMENTATION: Tidal Station disk VM#: 16307
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete and steel bulkhead OPUS PID:
LATITUDE: 40° 42.7' N ( 40.71170) LONGITUDE: 73° 58.1' W ( -73.96830)
The bench mark is a disk set in top of a concrete and steel sheetpile bulkhead
along the east edge of the East River, at the NYCDOT Maintenance Facility under
the east end of the Williamsburg Bridge, between the 3rd Pair of granite pier
foundations from the east end of the bridge, 13.50 m (44.3 ft) south of the
south face of the north granite pier, 0.26 m (0.9 ft) north of the north face of
the south granite pier, and 0.17 m (0.6 ft) west of the west edge of the
concrete bulkhead cap.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 7 of 8
Station ID: 8518699 PUBLICATION DATE: 09/15/2004
Name: WILLIAMSBURG BRIDGE
NY
NOAA Chart: 12335 Latitude: 40° 42.7' N ( 40.71170)
USGS Quad: BROOKLYN Longitude: 73° 58.1' W ( -73.96830)
T I D A L D A T U M S
Tidal datums at WILLIAMSBURG BRIDGE based on:
LENGTH OF SERIES: 1 MONTH
TIME PERIOD: October 2000 - November 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 = 1.446
MEAN HIGH WATER MHW = 1.347
North American Vertical Datum NAVD88 = 0.793
MEAN SEA LEVEL MSL = 0.727
MEAN TIDE LEVEL MTL = 0.703
MEAN LOW WATER MLW = 0.060
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 348 1952 9.721 8.374
H 348 1952 6.777 5.431
F 348 1952 7.399 6.053
851 8699 WBBR 1 14.314 12.967
851 8699 WBBR 2 14.904 13.557
8699 A 2000 3.050 1.704
8699 B 2000 3.028 1.681
8699 C 2000 3.045 1.698
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 8 of 8
Station ID: 8518699 PUBLICATION DATE: 09/15/2004
Name: WILLIAMSBURG BRIDGE
NY
NOAA Chart: 12335 Latitude: 40° 42.7' N ( 40.71170)
USGS Quad: BROOKLYN Longitude: 73° 58.1' W ( -73.96830)
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.