U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 6
Station ID: 8465748 PUBLICATION DATE: 05/12/2004
Name: NEW HAVEN
CT
NOAA Chart: 12371 Latitude: 41° 17.6' N ( 41.29330)
USGS Quad: New Haven Longitude: 72° 55.0' W ( -72.91670)
To reach the tidal bench marks from exit 50 of I-95 northbound, proceed to the
end of the exit ramp, then turn left on Woodward Avenue and go one block, then
turn left on Forbes Avenue (U.S. Highway 1) and continue NW for 1.3 km (0.8 mi)
to the lift bridge over the Quinnipiac River. The bench marks are located on
the grounds of Wyatt Fuel Oil at the NW end of the bridge and along US Highway
1. The tide gage and staff were located at the SW end of the NW bridge fender
on the SW side of the bridge.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 5748 A 1988
DESIGNATION: 846 5748 A
MONUMENTATION: Tidal Station disk VM#: 2270
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete foundation OPUS PID:
LATITUDE: 41° 17.9' N ( 41.29830) LONGITUDE: 72° 54.3' W ( -72.90500)
The primary bench mark is a disk set flush in the concrete foundation of a large
aluminum-walled oil tank with the Wyatt Fuel Oil logo on the face towards the
waterfront, 18.41 m (60.4 ft) west of the centerline of the dirt road along the
waterfront, 14.11 m (46.3 ft) WNW of power pole SNET #8834, 10.79 m (35.4 ft)
south of a cinder block retaining wall, and 0.12 m (0.4 ft) above ground level.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 6
Station ID: 8465748 PUBLICATION DATE: 05/12/2004
Name: NEW HAVEN
CT
NOAA Chart: 12371 Latitude: 41° 17.6' N ( 41.29330)
USGS Quad: New Haven Longitude: 72° 55.0' W ( -72.91670)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: V 34 1965
DESIGNATION: V 34
MONUMENTATION: Bench Mark disk VM#: 2268
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: LX0389
SETTING CLASSIFICATION: Concrete bridge pier OPUS PID:
LATITUDE: 41° 18.1' N ( 41.30170) LONGITUDE: 72° 54.8' W ( -72.91330)
The bench mark is a disk set vertically in the north concrete face of the east
leg of the south pier under the eastbound lane of the Connecticut Turnpike
(I-95) overpass over Water Street (U.S. Highway 1), 21 m (70 ft) west of the
west curb of Hamilton Street, 11 m (36 ft) south of the centerline of Water
Street, and 1 m (2 ft) above ground level.
BENCH MARK STAMPING: W 34 1965
DESIGNATION: W 34
MONUMENTATION: Bench Mark disk VM#: 2269
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: LX0393
SETTING CLASSIFICATION: Concrete bridge pier OPUS PID:
LATITUDE: 41° 17.8' N ( 41.29670) LONGITUDE: 72° 54.1' W ( -72.90170)
The bench mark is a disk set vertically in the south concrete face of a pier
supporting the Connecticut Turnpike (I-95) over Forbes Avenue (U.S. Highway 1),
55 m (180 ft) SE of the junction of Forbes Avenue and Waterfront Street, 5 m (15
ft) NE of the NE curb of the highway, and 0.55 m (1.8 ft) above ground level.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 6
Station ID: 8465748 PUBLICATION DATE: 05/12/2004
Name: NEW HAVEN
CT
NOAA Chart: 12371 Latitude: 41° 17.6' N ( 41.29330)
USGS Quad: New Haven Longitude: 72° 55.0' W ( -72.91670)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 5748 B 1988
DESIGNATION: 846 5748 B
MONUMENTATION: Tidal Station disk VM#: 2271
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete base OPUS PID:
LATITUDE: 41° 17.9' N ( 41.29830) LONGITUDE: 72° 54.3' W ( -72.90500)
The bench mark is a disk set flush in the 1.5 m x 0.9 m (4.8 ft x 3.0 ft)
concrete base supporting two wide-flange steel columns, 26.06 m (85.5 ft) NW of
the bulkhead along New Haven Harbor, 18.90 m (62.0 ft) SW of a concrete block
retaining wall on the SW side of two large oil tanks, 1.98 m (6.5 ft) NE of a
concrete block retaining wall near the NE side of a large ship slip, and 0.18 m
(0.6 ft) above ground level.
BENCH MARK STAMPING: 5748 C 1988
DESIGNATION: 846 5748 C
MONUMENTATION: Tidal Station disk VM#: 2272
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete wall OPUS PID:
LATITUDE: 41° 17.9' N ( 41.29830) LONGITUDE: 72° 54.3' W ( -72.90500)
The bench mark is a disk set flush in the concrete side wall for a truck scale,
12.59 m (41.3 ft) SSW of the SW corner of a machine shop (building #7), 11.37 m
(37.3 ft) SE of the SE corner of the scale house, and 0.43 m (1.4 ft) west of
the SW inside corner of the scale.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 6
Station ID: 8465748 PUBLICATION DATE: 05/12/2004
Name: NEW HAVEN
CT
NOAA Chart: 12371 Latitude: 41° 17.6' N ( 41.29330)
USGS Quad: New Haven Longitude: 72° 55.0' W ( -72.91670)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 5748 D 1988
DESIGNATION: 846 5748 D
MONUMENTATION: Tidal Station disk VM#: 2273
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete step OPUS PID:
LATITUDE: 41° 17.9' N ( 41.29830) LONGITUDE: 72° 54.3' W ( -72.90500)
The bench mark is a disk set flush in the concrete step of the foam house at the
entrance to the Wyatt Fuel Oil tank farm, 5.00 m (16.4 ft) south of the south
gate post at the entrance, 3.72 m (12.2 ft) ESE of the east curb of East Street,
0.73 m (2.4 ft) ENE of the NW corner of the foam house, and 0.27 m (0.9 ft)
above the pavement.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 6
Station ID: 8465748 PUBLICATION DATE: 05/12/2004
Name: NEW HAVEN
CT
NOAA Chart: 12371 Latitude: 41° 17.6' N ( 41.29330)
USGS Quad: New Haven Longitude: 72° 55.0' W ( -72.91670)
T I D A L D A T U M S
Tidal datums at NEW HAVEN based on:
LENGTH OF SERIES: 4 MONTHS
TIME PERIOD: June 1988 - September 1988
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION: 8467150 BRIDGEPORT, BRIDGEPORT HARBOR
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
MEAN HIGHER HIGH WATER MHHW = 2.066
MEAN HIGH WATER MHW = 1.967
North American Vertical Datum NAVD88 = 1.097
MEAN TIDE LEVEL MTL = 1.022
MEAN SEA LEVEL MSL = 1.021
MEAN LOW WATER MLW = 0.076
MEAN LOWER LOW WATER MLLW = 0.000
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
5748 A 1988 2.694 0.727
V 34 1965 4.588 2.621
W 34 1965 3.674 1.707
5748 B 1988 2.697 0.730
5748 C 1988 3.058 1.091
5748 D 1988 4.004 2.037
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 6
Station ID: 8465748 PUBLICATION DATE: 05/12/2004
Name: NEW HAVEN
CT
NOAA Chart: 12371 Latitude: 41° 17.6' N ( 41.29330)
USGS Quad: New Haven Longitude: 72° 55.0' W ( -72.91670)
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.