U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 7
Station ID: 9440083 PUBLICATION DATE: 04/03/2024
Name: VANCOUVER, COLUMBIA RIVER
WA
NOAA Chart: 18526 Latitude: 45° 37.9' N ( 45.63117)
USGS Quad: VANCOUVER Longitude: 122° 41.7' W (-122.69577)
To reach the bench marks from Interstate 5, take WA-501/Mill Plain Blvd exit 1C,
toward City Center/ Port of Vancouver, proceed west 3.06 km (1.9 miles), turn
left at Port entrance sign on NW 26th St., proceed 0.32 km (0.2 miles) over the
overpass to Port of Vancouver guard gate. Then turn left and proceed to berth
#2099 or bldg. #2025. The bench marks are located around the pier and the
buildings of the Port, the Great Western Malting Company, and the United Grain
Corporation. The tide gauge is located on the pier near berth #2099 and builing
#2025.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: ELEVATION
DESIGNATION: 944 0083 ELEVATION
MONUMENTATION: Bench Mark disk VM#: 17896
AGENCY: IDB PID#:
SETTING CLASSIFICATION: Concrete foundation OPUS PID:
LATITUDE: 45° 37.9' N ( 45.63092) LONGITUDE: 122° 41.6' W (-122.69333)
The primary benchmark is a disk set in the top of a concrete foundation for a
large grain silo, 17.30 m (56.8 ft) south of the southeast corner of Building
1975 (WSDA), 5.00 m (16.4 ft) southwest of telephone/ utility pole, 4.4 m (
14.4 ft) east of the yellow post holding the safety chain attached to the silo
and protecting the basement hatch, and 0.30 m (1 ft) above ground of the most
western silo behind Building 1905.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 7
Station ID: 9440083 PUBLICATION DATE: 04/03/2024
Name: VANCOUVER, COLUMBIA RIVER
WA
NOAA Chart: 18526 Latitude: 45° 37.9' N ( 45.63117)
USGS Quad: VANCOUVER Longitude: 122° 41.7' W (-122.69577)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 0083 C 1991
DESIGNATION: 944 0083 C
MONUMENTATION: Tidal Station disk VM#: 16649
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete loading dock OPUS PID:
LATITUDE: 45° 37.8' N ( 45.63042) LONGITUDE: 122° 41.4' W (-122.69075)
The bench mark is a disk set in the northern corner of building 335, Great
Western Malting Company, on the concrete loading dock, 13.72 m (45.0 ft) west of
a 0.91 m (3.0 ft) round raised cement sewer cover, 2.44 m (8.0 ft) west of the
corner of building 335, 1.83 m (6.0 ft) south of single railroad track, and 0.91
m (3.0 ft) above ground.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 7
Station ID: 9440083 PUBLICATION DATE: 04/03/2024
Name: VANCOUVER, COLUMBIA RIVER
WA
NOAA Chart: 18526 Latitude: 45° 37.9' N ( 45.63117)
USGS Quad: VANCOUVER Longitude: 122° 41.7' W (-122.69577)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING:
DESIGNATION: 944 0083 A
ALIAS: UNSTAMPED 1985
MONUMENTATION: Tidal Station disk VM#: 16651
AGENCY: City of Vancouver IDB PID#:
SETTING CLASSIFICATION: Pavement OPUS PID:
LATITUDE: 45° 37.8' N ( 45.63075) LONGITUDE: 122° 41.6' W (-122.69278)
The bench mark is set in concrete among the buildings and elevators of the
United Grain Corporation and the great Western Malting Company, directly behind
three conveyor passages leading from a shoreward grain elevator to a riverside
grain elevator, 22 m (72 ft) SW of a telephone pole which is surrounded by a
protective yellow rail, 6.71 m (22.0 ft) south of the nearest railroad track,
5.18 m (17.0 ft) west of a conveyor support structer and 0.15 m (0.5 ft) below
ground level under a protective iron casting.
BENCH MARK STAMPING: 0083 F 2007
DESIGNATION: 944 0083 F
MONUMENTATION: Tidal Station disk VM#: 18255
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete bull rail OPUS PID#: BBCV65
LATITUDE: 45° 37.9' N ( 45.63119) LONGITUDE: 122° 41.7' W (-122.69547)
The bench mark is set flush in the corner of a concrete bull rail on top of a
concrete pier deck at the port of Vancover berth 1, 15.90 m (52.2 ft) SSE of
light pole no 4, 12.55 m (41.17 ft) north of NE corner of tide equipment
instrument enclosure., 5.50 m (18.0 ft) west of NE most corner of concrete pier
pier deck, 0.30 m (1.0 ft) south of metal stairway, and 0.30 m (1.0 ft) above
pier deck.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 7
Station ID: 9440083 PUBLICATION DATE: 04/03/2024
Name: VANCOUVER, COLUMBIA RIVER
WA
NOAA Chart: 18526 Latitude: 45° 37.9' N ( 45.63117)
USGS Quad: VANCOUVER Longitude: 122° 41.7' W (-122.69577)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 0083D-RESET 2017
DESIGNATION: 944 0083 D RESET 2017
MONUMENTATION: Tidal Station disk VM#: 22886
AGENCY: Olson Engineering Inc. IDB PID#:
SETTING CLASSIFICATION: Water tank foundation OPUS PID:
LATITUDE: 45° 37.8' N ( 45.63053) LONGITUDE: 122° 41.4' W (-122.68972)
The bench is a brass disk set in the south side of the foundation of the
westmost of 2 blue water tanks, 17.2 m (56.4 ft) east of the NE corner of a 1.2
m (4 ft) x 2.4 m (8 ft) concrete vault on the east side of the Great Western
Malting Co parking lot, 6.36 m (20.9 ft) west of the southwesternmost of 3 red
fire water valves, 4.62 m (15.2 ft) north of the northmost railroad track, and
0.3 m (1.0 ft) above grade.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 7
Station ID: 9440083 PUBLICATION DATE: 04/03/2024
Name: VANCOUVER, COLUMBIA RIVER
WA
NOAA Chart: 18526 Latitude: 45° 37.9' N ( 45.63117)
USGS Quad: VANCOUVER Longitude: 122° 41.7' W (-122.69577)
T I D A L D A T U M S
Tidal datums at VANCOUVER, COLUMBIA RIVER based on:
LENGTH OF SERIES: 17 YEARS
TIME PERIOD: 08/2002 - 11/2018 Low Water Months Only
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION: 9439040 ASTORIA, TONGUE POINT, COLUMBIA RIVER
Elevations of tidal datums referred to Columbia River Datum (CRD), in METERS:
HIGHEST OBSERVED WATER LEVEL (03/28/2017) = 5.276
MEAN HIGHER HIGH WATER MHHW = 1.522
MEAN HIGH WATER MHW = 1.359
MEAN TIDE LEVEL MTL = 0.990
MEAN SEA LEVEL MSL = 0.961
MEAN LOW WATER MLW = 0.621
MEAN LOWER LOW WATER MLLW = 0.554
COLUMBIA RIVER DATUM CRD = 0.000
LOWEST OBSERVED WATER LEVEL (09/28/2009) = -0.173
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MHW CRD
ELEVATION 8.509 9.868
0083 C 1991 8.758 10.117
944 0083 A 8.066 9.425
0083 F 2007 8.135 9.494
0083D-RESET 2017 8.466 9.825
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 7
Station ID: 9440083 PUBLICATION DATE: 04/03/2024
Name: VANCOUVER, COLUMBIA RIVER
WA
NOAA Chart: 18526 Latitude: 45° 37.9' N ( 45.63117)
USGS Quad: VANCOUVER Longitude: 122° 41.7' W (-122.69577)
Foot Notes:
Columbia River Datum (CRD) is the adopted fixed low water reference plane for
this area. CRD is a U.S. Army Corps of Engineers non-tidal datum defined at
distinct river miles relative to NAVD88, and is used as chart datum above river
mile 23 on the Columbia River. Datums are computed using observations from the
low river stages of the year, generally August through October due to the
masking of the tidal signal from strong seasonal river runoff during other
portions of the year. Depending on river flow, water levels can be significantly
higher than Columbia River Datum. As of 2014, the U.S. Army Corps of Engineers
provided updated offsets for CRD that have been applied to this station. Station
Datum (STND) is no longer set equal to CRD
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 7 of 7
Station ID: 9440083 PUBLICATION DATE: 04/03/2024
Name: VANCOUVER, COLUMBIA RIVER
WA
NOAA Chart: 18526 Latitude: 45° 37.9' N ( 45.63117)
USGS Quad: VANCOUVER Longitude: 122° 41.7' W (-122.69577)
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.