U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 4
PUBLICATION DATE: 04/19/1984
Station ID: 9445639 SUPERCEDED DATE: 04/21/2003
Name: KINGSTON, APPLETREE COVE, PUGET SOUND
WASHINGTON
NOAA Chart: 18441 Latitude: 47° 47.8' N
USGS Quad: EDMONDS WEST Longitude: 122° 29.7' W
To reach the tidal bench marks from the intersection of Central Avenue (State
Highway 104) and Washington Boulevard in Kingston, proceed SE on Central Avenue
to the Standard Oil Pier on the Kingston Small Boat Harbor. The bench marks are
located in the vicinity of the boat slips and the tide gage and staff were
located on the Standard Oil Pier.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: NO 5 1973
MONUMENTATION: Survey Disk VM#: 9070
AGENCY: PID:
SETTING CLASSIFICATION: Concrete Sea Wall
The bench mark is set in the top of a sea wall on the NE side of the Kingston
Small Boat Harbor, 36 feet (11 m) NW of the south corner of a concrete capped
steel sea wall, 35 feet (11 m) SW of the SW (inshore) corner of the ferry pier
and 7.5 feet (2.3 m) NW of the NW edge of the gas pier.
BENCH MARK STAMPING: TIDAL 6 1973
MONUMENTATION: Survey Disk VM#: 9071
AGENCY: PID:
SETTING CLASSIFICATION: Concrete Sea Wall
The bench mark is set in the top of a concrete capped sea wall on the NE side of
the Kingston Small Boat Harbor, 50 feet (15 m) west of the SW (inshore) corner
of the ferry pier, 29.5 feet (9.0 m) NW of Bench Mark NO 5 1973, and 21 feet (6
m) south of a fire hydrant.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 4
PUBLICATION DATE: 04/19/1984
Station ID: 9445639 SUPERCEDED DATE: 04/21/2003
Name: KINGSTON, APPLETREE COVE, PUGET SOUND
WASHINGTON
NOAA Chart: 18441 Latitude: 47° 47.8' N
USGS Quad: EDMONDS WEST Longitude: 122° 29.7' W
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: TIDAL 7 1973
MONUMENTATION: Survey Disk VM#: 9072
AGENCY: PID:
SETTING CLASSIFICATION: Concrete Abutment
The bench mark is set on the north corner of a 2.5 x 6 foot (0.8 x 2 m) concrete
ramp abutment, along the NE side of the Kingston Small Boat Harbor, 65 feet (20
m) SE of the centerline of an overhead boat launching lift, and 15 feet (5 m)
north of the waterline at the inshore end of the hinged ramp leading to E dock
of the small boat slips.
BENCH MARK STAMPING: TIDAL 8 1973
MONUMENTATION: Survey Disk VM#: 9073
AGENCY: PID:
SETTING CLASSIFICATION: Concrete Step
The bench mark is at the Kingston Small Boat Harbor, on top of the first step
leading to the entrance of the utility room of the public restrooms, 60 feet (18
m) north of Bench Mark TIDAL 7 1973, 36 feet (11 m) SE of the centerline of an
overhead boat launching lift, 29 feet (9 m) north of the centerline of a paved
road, 2 feet (1 m) NW of the southeasternmost corner of a concrete block
structure (public restrooms) and 0.5 feet (0.2 m) south of the south wall. The
bench mark is 0.5 feet (0.2 m) above ground level.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 4
PUBLICATION DATE: 04/19/1984
Station ID: 9445639 SUPERCEDED DATE: 04/21/2003
Name: KINGSTON, APPLETREE COVE, PUGET SOUND
WASHINGTON
NOAA Chart: 18441 Latitude: 47° 47.8' N
USGS Quad: EDMONDS WEST Longitude: 122° 29.7' W
T I D A L D A T U M S
Tidal datums at KINGSTON, APPLETREE COVE, PUGET SOUND based on:
LENGTH OF SERIES: 1 MONTH
TIME PERIOD: FEBRUARY 1983
TIDAL EPOCH: 1960-1978
CONTROL TIDE STATION: 9447130 SEATTLE
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in FEET:
HIGHEST OBSERVED WATER LEVEL (01/19/1973) = 13.05
MEAN HIGHER HIGH WATER MHHW = 10.99
MEAN HIGH WATER MHW = 10.14
MEAN TIDE LEVEL MTL = 6.48
MEAN LOW WATER MLW = 2.82
MEAN LOWER LOW WATER MLLW = 0.00
LOWEST OBSERVED WATER LEVEL (01/19/1973) = -2.38
Bench Mark Elevation Information In FEET above:
Stamping or Designation MLLW MHW
NO 5 1973 14.70 4.56
TIDAL 6 1973 14.67 4.53
TIDAL 7 1973 18.06 7.92
TIDAL 8 1973 18.59 8.45
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 4
PUBLICATION DATE: 04/19/1984
Station ID: 9445639 SUPERCEDED DATE: 04/21/2003
Name: KINGSTON, APPLETREE COVE, PUGET SOUND
WASHINGTON
NOAA Chart: 18441 Latitude: 47° 47.8' N
USGS Quad: EDMONDS WEST Longitude: 122° 29.7' 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.