U.S. DEPARTMENT OF COMMERCE
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National Ocean Service
Datums Page Page 1 of 6
Station ID: 9447659 PUBLICATION DATE: 02/05/2004
Name: EVERETT
WA
NOAA Chart: 18443 Latitude: 47° 58.8' N ( 47.98000)
USGS Quad: EVERETT Longitude: 122° 13.4' W (-122.22300)
To reach the tidal bench marks from the intersection of Rucker Avenue and Hewitt
Avenue in Everett, proceed west on Hewitt Avenue, then cross under the
Burlington Northern railroad tracks at the termination of Hewitt Avenue at the
waterfront, then turn left and proceed SW on Terminal Street for 0.24 km (0.15
mi) to the Port of Everett Pier 1 Complex, then turn right and proceed through
the pier 1 NW gate, then head west to the extreme seaward side of pier 1. The
bench marks are on the shore area around the pier. The tide gage and staff were
at the center of the pier end.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 5 1934
DESIGNATION: 944 7659 TIDAL 5
MONUMENTATION: Tidal Station disk VM#: 9204
AGENCY: US Coast & Geodetic Survey
(USC&GS) IDB PID#:
SETTING CLASSIFICATION: Abutment OPUS PID:
LATITUDE: 47° 58.6' N ( 47.97670) LONGITUDE: 122° 13.2' W (-122.22000)
The primary bench mark is a disk set in the lowest step at the NW end of the NE
abutment of the railroad bridge over Wall Street, 137 m (450 ft) SW of the SW
end of the passenger station, 5.64 m (18.5 ft) NE of the centerline of Wall
Street, 5.18 m (17.0 ft) NW of the NW rail, 4.57 m (15.0 ft) below the track,
0.91 m (3.0 ft) SE of the SE end of the concrete retaining wall, and 0.76 m (2.5
ft) above the sidewalk level.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 6
Station ID: 9447659 PUBLICATION DATE: 02/05/2004
Name: EVERETT
WA
NOAA Chart: 18443 Latitude: 47° 58.8' N ( 47.98000)
USGS Quad: EVERETT Longitude: 122° 13.4' W (-122.22300)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 4 1934
DESIGNATION: 944 7659 TIDAL 4
MONUMENTATION: Tidal Station disk VM#: 9202
AGENCY: US Coast & Geodetic Survey
(USC&GS) IDB PID#: SY0004
SETTING CLASSIFICATION: Abutment OPUS PID:
LATITUDE: 47° 58.8' N ( 47.98000) LONGITUDE: 122° 13.0' W (-122.21700)
The bench mark is a disk set into the concrete abutment on the SE end of the NE
concrete abutment of the steel railroad bridge over Hewitt Avenue, 100 m (330
ft) north of the railroad station, 13 rails NE of the NE end of the passenger
station, 2.59 m (8.5 ft) SE of the SE rail, 2.13 m (7.0 ft) above the sidewalk,
and 1.22 m (4.0 ft) below the level of the overhead tracks.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 6
Station ID: 9447659 PUBLICATION DATE: 02/05/2004
Name: EVERETT
WA
NOAA Chart: 18443 Latitude: 47° 58.8' N ( 47.98000)
USGS Quad: EVERETT Longitude: 122° 13.4' W (-122.22300)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: J 7 ELEV 23.025 FT
DESIGNATION: J 7
MONUMENTATION: Bench Mark disk VM#: 9203
AGENCY: US Coast & Geodetic Survey
(USC&GS) IDB PID#: SY0003
SETTING CLASSIFICATION: Concrete abutment OPUS PID:
LATITUDE: 47° 58.8' N ( 47.98000) LONGITUDE: 122° 13.0' W (-122.21700)
The bench mark is a disk set into the concrete abutment at the Hewitt Avenue
overhead bridge No. 406, in the top of the NW corner of the west stone abutment
supporting steel column on the south curb line of Hewitt Avenue, 91 m (300 ft)
NE of the NE end of the railroad station, 5.18 m (17.0 ft) south of the
centerline of the south lane of Hewitt Avenue, and 5 m (16.0 ft) north of the
retaining wall face at the SW end of underpass.
BENCH MARK STAMPING: 7659 A 1995
DESIGNATION: 944 7659 A TIDAL
MONUMENTATION: Tidal Station disk VM#: 17105
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete retaining wall OPUS PID:
LATITUDE: 47° 58.8' N ( 47.98000) LONGITUDE: 122° 13.4' W (-122.22300)
The bench mark is set in a concrete bullrail located at the Port of Everett
South Terminal, Dolphin Berth Pier, 14.48 m (47.5 ft) east of west face of pier,
6.43 m (21.1 ft) south of northeast corner of pier and 0.18m (0.6 ft) west of
east face of pier.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 6
Station ID: 9447659 PUBLICATION DATE: 02/05/2004
Name: EVERETT
WA
NOAA Chart: 18443 Latitude: 47° 58.8' N ( 47.98000)
USGS Quad: EVERETT Longitude: 122° 13.4' W (-122.22300)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 7659 B 1995
DESIGNATION: 944 7659 B TIDAL
MONUMENTATION: Tidal Station disk VM#: 17106
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete retaining wall OPUS PID:
LATITUDE: 47° 58.8' N ( 47.98000) LONGITUDE: 122° 13.4' W (-122.22300)
The bench mark is set in a concrete retaining wall for a storm drain culvert,
25.66 m (84.2 ft) southeast from southeast corner of blue metal building used
for wood chip loading, 7.01 m (23.0 ft) west of chain link fence along railway,
and 0.80 m (2.62 ft) east of west edge of storm drain wall.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 6
Station ID: 9447659 PUBLICATION DATE: 02/05/2004
Name: EVERETT
WA
NOAA Chart: 18443 Latitude: 47° 58.8' N ( 47.98000)
USGS Quad: EVERETT Longitude: 122° 13.4' W (-122.22300)
T I D A L D A T U M S
Tidal datums at EVERETT based on:
LENGTH OF SERIES: 2 MONTHS
TIME PERIOD: December 1995 - January 1996
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION: 9447130 SEATTLE, PUGET SOUND
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
MEAN HIGHER HIGH WATER MHHW = 3.380
MEAN HIGH WATER MHW = 3.114
MEAN TIDE LEVEL MTL = 1.984
MEAN SEA LEVEL MSL = 1.976
MEAN LOW WATER MLW = 0.854
North American Vertical Datum NAVD88 = 0.620
MEAN LOWER LOW WATER MLLW = 0.000
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
5 1934 7.048 3.934
4 1934 12.779 9.665
J 7 ELEV 23.025 FT 8.781 5.667
7659 A 1995 5.720 2.606
7659 B 1995 6.485 3.371
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 6
Station ID: 9447659 PUBLICATION DATE: 02/05/2004
Name: EVERETT
WA
NOAA Chart: 18443 Latitude: 47° 58.8' N ( 47.98000)
USGS Quad: EVERETT Longitude: 122° 13.4' W (-122.22300)
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.