U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 5
PUBLICATION DATE: 03/06/1992
Station ID: 9449184 SUPERCEDED DATE: 04/21/2003
Name: GOOSEBERRY POINT, HALE PASSAGE
WASHINGTON
NOAA Chart: 18424 Latitude: 48° 43.9' N
USGS Quad: LUMMI ISLAND Longitude: 122° 40.2' W
To reach the tidal bench marks from Marietta (west of US Highway 5 and NW of
Bellingham), proceed SW along Lummi Bay on the Lummi Indian Reservation to
Fishermans Cove and Hale passage. The tidal bench marks are in the vicinity of
the ferry dock. The tide gauge and staff were on the marina pier just west of
the ferry dock.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 2 1974
MONUMENTATION: Survey Disk VM#: 9282
AGENCY: PID:
SETTING CLASSIFICATION: Concrete Foundation
The primary bench mark is set in the center of the south side of a gasoline pump
island foundation just north of the Fishermans Cove grocery store, south of an
ice machine, and 1 foot (0.3 m) north of the north wall of the store and under
the east edge of a round vertical timber. (NOTE: A rod cannot be set on the
disk).
BENCH MARK STAMPING: 69 RS 1940 RESET 1956
MONUMENTATION: Survey Disk VM#: 9279
AGENCY: PID:
SETTING CLASSIFICATION: Concrete Monument
The bench mark is set in a 0.7 foot (0.2 m) diameter concrete monument flush
with the surface of the Lummi Island Ferry parking lot, about 105 feet (32 m) NE
of Fishermans Cove Boathouse, 64 feet (20 m) south of the centerline of Lummi
View Drive, 21.5 feet (6.6 m) south of wooden power pole #22513, and 19 feet (6
m) SSW of the east end of a concrete sidewalk.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 5
PUBLICATION DATE: 03/06/1992
Station ID: 9449184 SUPERCEDED DATE: 04/21/2003
Name: GOOSEBERRY POINT, HALE PASSAGE
WASHINGTON
NOAA Chart: 18424 Latitude: 48° 43.9' N
USGS Quad: LUMMI ISLAND Longitude: 122° 40.2' W
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 5 1956
MONUMENTATION: Survey Disk VM#: 9280
AGENCY: PID:
SETTING CLASSIFICATION: Concrete Foundation
The bench mark is set in the SE foundation for a gasoline pump (now removed) on
the east side of Fishermans Cove Boathouse.
BENCH MARK STAMPING: NO 6 1956
MONUMENTATION: Survey Disk VM#: 9281
AGENCY: PID:
SETTING CLASSIFICATION: Concrete Apron
The bench mark is set in the concrete apron on the south side of Fishermans Cove
Boathouse, 50 feet (15 m) west of the centerline of Lummi View Drive, 2.0 feet
(0.6 m) west of the east end of the apron, and 1.5 feet (0.5 m) south of a wall.
BENCH MARK STAMPING: 3 1974
MONUMENTATION: Survey Disk VM#: 9283
AGENCY: PID:
SETTING CLASSIFICATION: Concrete Slab
The bench mark is set in the SE corner of a 3 foot (1 m) square concrete slab at
the NE corner of the Fishermans Cove Boathouse, and about 33 feet (10 m) SW of
the centerline of Haxton Way.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 5
PUBLICATION DATE: 03/06/1992
Station ID: 9449184 SUPERCEDED DATE: 04/21/2003
Name: GOOSEBERRY POINT, HALE PASSAGE
WASHINGTON
NOAA Chart: 18424 Latitude: 48° 43.9' N
USGS Quad: LUMMI ISLAND Longitude: 122° 40.2' W
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 944 9184 A 1981
MONUMENTATION: Survey Disk VM#: 9284
AGENCY: PID:
SETTING CLASSIFICATION: Concrete Foundation
The bench mark is set near the north end of a concrete gasoline pump island
foundation, 28.5 feet (8.7 m) north of the north wall of the Fishermans Cove
grocery store, 2.1 feet (0.6 m) south of the north end of the concrete island,
1.5 feet (0.5 m) west of the center of a metal flagpole, and about 1 foot (0.3
m) higher than street grade.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 5
PUBLICATION DATE: 03/06/1992
Station ID: 9449184 SUPERCEDED DATE: 04/21/2003
Name: GOOSEBERRY POINT, HALE PASSAGE
WASHINGTON
NOAA Chart: 18424 Latitude: 48° 43.9' N
USGS Quad: LUMMI ISLAND Longitude: 122° 40.2' W
T I D A L D A T U M S
Tidal datums at GOOSEBERRY POINT, HALE PASSAGE based on:
LENGTH OF SERIES: 70 HIGH 69 LOW WATER
TIME PERIOD: MARCH 7 - APRIL 12, 1974
TIDAL EPOCH: 1960-1978
CONTROL TIDE STATION: 9449880 FRIDAY HARBOR
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in FEET:
HIGHEST OBSERVED WATER LEVEL (04/01/1974) = 9.98
MEAN HIGHER HIGH WATER MHHW = 8.83
MEAN HIGH WATER MHW = 8.05
MEAN TIDE LEVEL MTL = 5.26
MEAN LOW WATER MLW = 2.48
MEAN LOWER LOW WATER MLLW = 0.00
LOWEST OBSERVED WATER LEVEL (04/10/1974) = -0.85
Bench Mark Elevation Information In FEET above:
Stamping or Designation MLLW MHW
2 1974 11.67 3.62
69 RS 1940 RESET 1956 11.71 3.66
5 1956 12.90 4.86
NO 6 1956 11.76 3.71
3 1974 11.45 3.40
944 9184 A 1981 11.67 3.62
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 5
PUBLICATION DATE: 03/06/1992
Station ID: 9449184 SUPERCEDED DATE: 04/21/2003
Name: GOOSEBERRY POINT, HALE PASSAGE
WASHINGTON
NOAA Chart: 18424 Latitude: 48° 43.9' N
USGS Quad: LUMMI ISLAND Longitude: 122° 40.2' W
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 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.