U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 5
Station ID: 9449161 PUBLICATION DATE: 07/15/2004
Name: VILLAGE POINT, LUMMI ISLAND
WA
NOAA Chart: 18430 Latitude: 48° 43.0' N ( 48.71670)
USGS Quad: ANACORTES Longitude: 122° 42.5' W (-122.70800)
To reach the tidal bench marks from the ferry terminal on Lummi Island, proceed
west along Legoe Bay Drive to the Village Point Marina. The bench marks are
located in the vicinity of the Village Point Marina. The tide gage and staff
were located on the Village Point Marina pier.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: NO 2 1972
DESIGNATION: 944 9161 TIDAL 2
MONUMENTATION: Tidal Station disk VM#: 9275
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete foundation OPUS PID:
LATITUDE: 48° 43.0' N ( 48.71670) LONGITUDE: 122° 42.5' W (-122.70800)
The primary bench mark is a disk set flush in the SE corner of the foundation of
the Village Point Marina garage, 20.88 m (68.5 ft) NE of bench mark NO 1 1972,
0.15 m (0.5 ft) west of the SE corner of the garage, and 6 cm (0.2 ft) south of
the southern wall of the garage.
BENCH MARK STAMPING: NO 1 1972
DESIGNATION: 944 9161 TIDAL 1
MONUMENTATION: Tidal Station disk VM#: 9274
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete foundation OPUS PID:
LATITUDE: 48° 43.0' N ( 48.71670) LONGITUDE: 122° 42.5' W (-122.70800)
The bench mark is a disk set in the 1 m (3 ft) square concrete foundation for
the east of two concrete pillars on the north side of Legoe Bay Drive in front
of the Village Point Marina garage entrance, and 4.42 m (14.5 ft) south of the
garage.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 5
Station ID: 9449161 PUBLICATION DATE: 07/15/2004
Name: VILLAGE POINT, LUMMI ISLAND
WA
NOAA Chart: 18430 Latitude: 48° 43.0' N ( 48.71670)
USGS Quad: ANACORTES Longitude: 122° 42.5' W (-122.70800)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: NO 3 1972
DESIGNATION: 944 9161 TIDAL 3
MONUMENTATION: Tidal Station disk VM#: 9276
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete foundation OPUS PID:
LATITUDE: 48° 43.0' N ( 48.71670) LONGITUDE: 122° 42.5' W (-122.70800)
The bench mark is a disk set flush in the 1 m (4 ft) diameter concrete
foundation for a 6-inch cedar post, 27 m (87 ft) SE of bench mark NO 2 1972, 5 m
(15 ft) south of the centerline of Legoe Bay Drive, and 2 m (8 ft) ENE of the NE
corner of a green shack.
BENCH MARK STAMPING: NO 4 1972
DESIGNATION: 944 9161 TIDAL 4
MONUMENTATION: Tidal Station disk VM#: 9277
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Boulder OPUS PID:
LATITUDE: 48° 43.0' N ( 48.71670) LONGITUDE: 122° 42.5' W (-122.70800)
The bench mark is a disk set on the highest point of a 2 m x 1 m (5 ft x 2 ft)
rock on the west side of a narrow land jetty east of the Village Point Marina
pier, 35 m (116 ft) east of bench mark NO 3 1972, and 16 m (54 ft) south of the
centerline of Legoe Bay Drive.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 5
Station ID: 9449161 PUBLICATION DATE: 07/15/2004
Name: VILLAGE POINT, LUMMI ISLAND
WA
NOAA Chart: 18430 Latitude: 48° 43.0' N ( 48.71670)
USGS Quad: ANACORTES Longitude: 122° 42.5' W (-122.70800)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: NO 5 1972
DESIGNATION: 944 9161 TIDAL 5
MONUMENTATION: Tidal Station disk VM#: 9278
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete foundation OPUS PID:
LATITUDE: 48° 43.0' N ( 48.71670) LONGITUDE: 122° 42.5' W (-122.70800)
The bench mark is a disk set flush in the SW corner of the foundation of the
Village Point Marina garage, 25.73 m (84.4 ft) WNW of bench mark NO 1 1972, 1 m
(4 ft) east of the SW corner of the Village Point Marina garage, 6 cm (0.2 ft)
south of the southern wall of the garage.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 5
Station ID: 9449161 PUBLICATION DATE: 07/15/2004
Name: VILLAGE POINT, LUMMI ISLAND
WA
NOAA Chart: 18430 Latitude: 48° 43.0' N ( 48.71670)
USGS Quad: ANACORTES Longitude: 122° 42.5' W (-122.70800)
T I D A L D A T U M S
Tidal datums at VILLAGE POINT, LUMMI ISLAND based on:
LENGTH OF SERIES: 2 MONTHS
TIME PERIOD: February 1975 - March 1975
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION: 9449424 CHERRY POINT, STRAIT OF GEORGIA
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
MEAN HIGHER HIGH WATER MHHW = 2.637
MEAN HIGH WATER MHW = 2.393
MEAN TIDE LEVEL MTL = 1.585
MEAN SEA LEVEL MSL = 1.524
MEAN LOW WATER MLW = 0.777
MEAN LOWER LOW WATER MLLW = 0.000
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
NO 2 1972 4.104 1.711
NO 1 1972 4.334 1.941
NO 3 1972 4.506 2.113
NO 4 1972 4.736 2.343
NO 5 1972 4.090 1.697
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 5
Station ID: 9449161 PUBLICATION DATE: 07/15/2004
Name: VILLAGE POINT, LUMMI ISLAND
WA
NOAA Chart: 18430 Latitude: 48° 43.0' N ( 48.71670)
USGS Quad: ANACORTES Longitude: 122° 42.5' W (-122.70800)
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.