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National Ocean Service
Datums Page Page 1 of 9
Station ID: 8465692 PUBLICATION DATE: 04/01/2004
Name: LIGHTHOUSE POINT, NEW HAVEN HARBOR
CT
NOAA Chart: 12371 Latitude: 41° 15.1' N ( 41.25170)
USGS Quad: New Haven Longitude: 72° 54.3' W ( -72.90500)
To reach the tidal bench marks from northbound I-95, take exit 50 to Woodward
Avenue, then one block east to Townsend Avenue, then go south on Townsend Avenue
for 3.5 km (2.2 mi), then turn right on Lighthouse Road and go 1.0 km (0.6 mi)
to the entrance of Lighthouse Point Park, then continue SW of the park entrance
road for 0.3 km (0.2 mi) to the fishing pier on the right. The bench marks are
located around the park. The tide gage and staff were located on the north side
of the pier.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 5692 A 1988
DESIGNATION: 846 5692 A
MONUMENTATION: Tidal Station disk VM#: 4835
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete abutment OPUS PID:
LATITUDE: 41° 15.1' N ( 41.25170) LONGITUDE: 72° 54.3' W ( -72.90500)
The primary bench mark is a disk set flush in the NE concrete abutment at the
foot of the fishing pier at Lighthouse Point Park, 8.84 m (29.0 ft) NW of the SE
end of the wood railing on the north side of the pier, 2.74 m (9.0 ft) ENE of
the centerline of the pier, and 0.18 m (0.6 ft) south of the north face of the
abutment.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 9
Station ID: 8465692 PUBLICATION DATE: 04/01/2004
Name: LIGHTHOUSE POINT, NEW HAVEN HARBOR
CT
NOAA Chart: 12371 Latitude: 41° 15.1' N ( 41.25170)
USGS Quad: New Haven Longitude: 72° 54.3' W ( -72.90500)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: LIGHT 1982
DESIGNATION: LIGHT
MONUMENTATION: Triangulation Station disk VM#: 4831
AGENCY: National Geodetic Survey (NGS) IDB PID#: LX7598
SETTING CLASSIFICATION: Concrete slab OPUS PID#: LX7598
LATITUDE: 41° 15.0' N ( 41.25000) LONGITUDE: 72° 54.2' W ( -72.90330)
The bench mark is a disk set flush in a 1.3 m x 2.3 m (4.3 ft x 7.5 ft) concrete
slab north of the lighthouse at Lighthouse Point Park, on high ground and near
the shoreline, 39.44 m (129.4 ft) WNW of the west corner of a picnic pavilion,
37.70 m (123.7 ft) SW of a 2 m (7 ft) circumference oak tree, and 10.70 m (35.1
ft) west of the centerline of a track road.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 9
Station ID: 8465692 PUBLICATION DATE: 04/01/2004
Name: LIGHTHOUSE POINT, NEW HAVEN HARBOR
CT
NOAA Chart: 12371 Latitude: 41° 15.1' N ( 41.25170)
USGS Quad: New Haven Longitude: 72° 54.3' W ( -72.90500)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: LIGHT NO 1 1982
DESIGNATION: LIGHT RM 1
MONUMENTATION: Reference Mark disk VM#: 4832
AGENCY: National Geodetic Survey (NGS) IDB PID#: AC8378
SETTING CLASSIFICATION: Bedrock outcrop OPUS PID#: AC8378
LATITUDE: 41° 15.1' N ( 41.25170) LONGITUDE: 72° 54.3' W ( -72.90500)
The bench mark is a disk set in a bedrock outcrop along the shoreline, 29.20 m
(95.8 ft) SW of a 2.13 m (7.0 ft) circumference oak tree, 8.29 m (27.2 ft) NNE
of bench mark LIGHT 1982, and 6.40 m (21.0 ft) west of the centerline of a track
road.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 9
Station ID: 8465692 PUBLICATION DATE: 04/01/2004
Name: LIGHTHOUSE POINT, NEW HAVEN HARBOR
CT
NOAA Chart: 12371 Latitude: 41° 15.1' N ( 41.25170)
USGS Quad: New Haven Longitude: 72° 54.3' W ( -72.90500)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: LIGHT NO 2 1982
DESIGNATION: LIGHT RM 2
MONUMENTATION: Reference Mark disk VM#: 4833
AGENCY: National Geodetic Survey (NGS) IDB PID#: AC8379
SETTING CLASSIFICATION: Bedrock outcrop OPUS PID:
LATITUDE: 41° 15.1' N ( 41.25170) LONGITUDE: 72° 54.3' W ( -72.90500)
The bench mark is a disk set in a bedrock outcrop along the shoreline, 38.68 m
(126.9 ft) west of a 2.13 m (7.0 ft) circumference oak tree, 15.00 m (49.2 ft)
NW of the centerline of a track road, and 4.91 m (16.1 ft) WNW of bench mark
LIGHT 1982.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 9
Station ID: 8465692 PUBLICATION DATE: 04/01/2004
Name: LIGHTHOUSE POINT, NEW HAVEN HARBOR
CT
NOAA Chart: 12371 Latitude: 41° 15.1' N ( 41.25170)
USGS Quad: New Haven Longitude: 72° 54.3' W ( -72.90500)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: LIGHT 1982 (AZ)
DESIGNATION: LIGHT AZ MK
MONUMENTATION: Azimuth Mark disk VM#: 4834
AGENCY: National Geodetic Survey (NGS) IDB PID#: LX7599
SETTING CLASSIFICATION: Concrete monument OPUS PID:
LATITUDE: 41° 15.1' N ( 41.25170) LONGITUDE: 72° 54.0' W ( -72.90000)
The bench mark is a disk set in a concrete monument, 0.2 km (0.1 mi) SW of the
entrance to Lighthouse Point Park, 24.60 m (80.7 ft) ENE of power pole #102 with
light attached, 20.42 m (67.0 ft) east of the east face of a round concrete
building, 6.80 m (22.3 ft) ESE of the east curb of the paved road, and at ground
level.
BENCH MARK STAMPING: 5692 B 1988
DESIGNATION: 846 5692 B
MONUMENTATION: Tidal Station disk VM#: 4836
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Bedrock outcrop OPUS PID:
LATITUDE: 41° 15.1' N ( 41.25170) LONGITUDE: 72° 54.3' W ( -72.90500)
The bench mark is a disk set in a bedrock outcrop on a small knoll, 63 m (207
ft) NE of the NE corner of the brick rangers headquarters building, 57.61 m
(189.0 ft) ESE of the centerline of the gravel road leading to the lighthouse,
and 40.23 m (132.0 ft) WNW of power pole #10242 with light.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 9
Station ID: 8465692 PUBLICATION DATE: 04/01/2004
Name: LIGHTHOUSE POINT, NEW HAVEN HARBOR
CT
NOAA Chart: 12371 Latitude: 41° 15.1' N ( 41.25170)
USGS Quad: New Haven Longitude: 72° 54.3' W ( -72.90500)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 5692 C 1988
DESIGNATION: 846 5692 C
MONUMENTATION: Tidal Station disk VM#: 4837
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Bedrock outcrop OPUS PID:
LATITUDE: 41° 15.1' N ( 41.25170) LONGITUDE: 72° 54.3' W ( -72.90500)
The bench mark is a disk set in a bedrock outcrop along the entrance road to
Lighthouse Point Park, 48 m (157 ft) west of the center post at the entrance to
the park, 12.62 m (41.4 ft) WNW of power pole #10234 with light, and 5.18 m
(17.0 ft) NNW of the centerline of the entrance road.
BENCH MARK STAMPING: 201
DESIGNATION: 846 5692 201
MONUMENTATION: Survey disk VM#: 4838
AGENCY: Town of New Haven IDB PID#:
SETTING CLASSIFICATION: Concrete monument OPUS PID:
LATITUDE: 41° 15.1' N ( 41.25170) LONGITUDE: 72° 54.3' W ( -72.90500)
The bench mark is a disk set in top of a concrete monument on the north side of
Lighthouse Road, 45.87 m (150.5 ft) west of Morris Avenue, 21.46 m (70.4 ft) NE
of S.N.E.T. power pole #307, 13.56 m (44.5 ft) SW of the SW corner of the
concrete foundation of the porch at #310 Lighthouse Road, 11.19 m (36.7 ft) SW
of the SW corner of the stucco foundation of the house at #308 Lighthouse Road,
1.89 m (6.2 ft) NE of an iron property line pin in the south end of a stone wall
between houses #300 and #308, and slightly below the level of the driveway.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 7 of 9
Station ID: 8465692 PUBLICATION DATE: 04/01/2004
Name: LIGHTHOUSE POINT, NEW HAVEN HARBOR
CT
NOAA Chart: 12371 Latitude: 41° 15.1' N ( 41.25170)
USGS Quad: New Haven Longitude: 72° 54.3' W ( -72.90500)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 202
DESIGNATION: 846 5692 202
MONUMENTATION: Survey disk VM#: 4839
AGENCY: Town of New Haven IDB PID#:
SETTING CLASSIFICATION: Concrete monument OPUS PID:
LATITUDE: 41° 15.1' N ( 41.25170) LONGITUDE: 72° 54.3' W ( -72.90500)
The bench mark is a disk set in top of a concrete monument at the east end of a
triangular grass plot at the west end of Lighthouse Road at the entrance to
Lighthouse Point Park, 26.58 m (87.2 ft) SE of the center of the top nut of a
fire hydrant on the NE corner of Cora Street and Lighthouse Road, 25.60 m (84.0
ft) SW of the SE corner of the brick foundation of the house at #162 Lighthouse
Road, 18.35 m (60.2 ft) west of S.N.E.T. power pole # 316, 9.78 m (32.1 ft) NE
of the north corner of a bronze plaque on the war memorial stone, and at ground
level.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 8 of 9
Station ID: 8465692 PUBLICATION DATE: 04/01/2004
Name: LIGHTHOUSE POINT, NEW HAVEN HARBOR
CT
NOAA Chart: 12371 Latitude: 41° 15.1' N ( 41.25170)
USGS Quad: New Haven Longitude: 72° 54.3' W ( -72.90500)
T I D A L D A T U M S
Tidal datums at LIGHTHOUSE POINT, NEW HAVEN HARBOR 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 = 2.036
MEAN HIGH WATER MHW = 1.935
MEAN TIDE LEVEL MTL = 1.003
MEAN SEA LEVEL MSL = 1.001
MEAN LOW WATER MLW = 0.071
MEAN LOWER LOW WATER MLLW = 0.000
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
5692 A 1988 5.637 3.702
LIGHT 1982 7.098 5.163
LIGHT NO 1 1982 6.586 4.651
LIGHT NO 2 1982 6.602 4.667
LIGHT 1982 (AZ) 10.756 8.821
5692 B 1988 7.095 5.160
5692 C 1988 12.423 10.488
201 11.543 9.608
202 9.146 7.211
Foot Notes:
Bench marks 201 and 202 are based on one differential leveling connection and do
not meet the quality control standards of the NOS. Therefore, caution should be
used when deriving elevations for these marks.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 9 of 9
Station ID: 8465692 PUBLICATION DATE: 04/01/2004
Name: LIGHTHOUSE POINT, NEW HAVEN HARBOR
CT
NOAA Chart: 12371 Latitude: 41° 15.1' N ( 41.25170)
USGS Quad: New Haven Longitude: 72° 54.3' W ( -72.90500)
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.