U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 6
Station ID: 9439099 PUBLICATION DATE: 12/22/2023
Name: WAUNA, COLUMBIA RIVER
OR
NOAA Chart: 18523 Latitude: 46° 9.6' N ( 46.16000)
USGS Quad: CATHLAMET Longitude: 123° 24.3' W (-123.40500)
To reach the tidal bench marks from U.S. Highway 30 in Wauna, Oregon, follow
signs to Wauna. Enter the main road to mill and visitors check in. Obtain pass
for pump house tide gage. Proceed through gate and make a right past buildings
to waterfront and dock. Equipment located in metal shed used to house fire
pump.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 9099 H 1994
DESIGNATION: 943 9099 H
MONUMENTATION: Tidal Station disk VM#: 16658
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete slurry tank OPUS PID:
LATITUDE: 46° 9.7' N ( 46.16114) LONGITUDE: 123° 24.6' W (-123.40958)
The primary bench mark is a disk set flush in a concrete slurry tank on the NW
side of the office building at the north end of the plant, 16.61 m (54.5 ft) NW
of office building, 6.04 m (19.8 ft) south of the telephone pole, 0.85 m (2.8
ft) above the ground, and 0.21 m (0.7 ft) north of the south corner of the
slurry tank.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 6
Station ID: 9439099 PUBLICATION DATE: 12/22/2023
Name: WAUNA, COLUMBIA RIVER
OR
NOAA Chart: 18523 Latitude: 46° 9.6' N ( 46.16000)
USGS Quad: CATHLAMET Longitude: 123° 24.3' W (-123.40500)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 9099 M 2009
DESIGNATION: 943 9099 M
MONUMENTATION: Tidal Station disk VM#: 19446
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete pad OPUS PID:
LATITUDE: 46° 9.7' N ( 46.16092) LONGITUDE: 123° 24.6' W (-123.40950)
The bench mark is a disk set flush in the top west corner of a 0.91 m (3 ft) by
3.35 m (11.0 ft) concrete pad supporting a covered stairwell next to the
shipping/ receiving building, 32.55 m (106.8 ft) east of a metal elevator
support on the building opposite of shipping/receiving, 5.7 m (18.7 ft) south of
the SW corner of the shipping/receiving building, 4.35 m (14.3 ft) north of a
fire hydrant, and 0.7 m (2.3 ft) above ground level.
BENCH MARK STAMPING: 9099 N 2010
DESIGNATION: 943 9099 N
MONUMENTATION: Tidal Station disk VM#: 19815
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete footing OPUS PID:
LATITUDE: 46° 9.6' N ( 46.16025) LONGITUDE: 123° 24.5' W (-123.40753)
The bench mark is a disk set into the top of the west-southwest edge of the
foundation footing of the Georgia Pacific Warehouse 'W', 12.2 m (40.0 ft) north
of the north corner of the Georgia Pacific NW Converting Building marked with a
door labeled Stores Delivery Point 'WAU 095', 6.67 m (21.9 ft) east of a yellow
fire hydrant labeled "'66", 0.97 m(3.2 ft) SW of the SE side of Warehouse 'W',
and 0.3 m (1.0 ft) above the road grade.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 6
Station ID: 9439099 PUBLICATION DATE: 12/22/2023
Name: WAUNA, COLUMBIA RIVER
OR
NOAA Chart: 18523 Latitude: 46° 9.6' N ( 46.16000)
USGS Quad: CATHLAMET Longitude: 123° 24.3' W (-123.40500)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 9099 P 2017
DESIGNATION: 943 9099 P
ALIAS: 9099 P 2017
MONUMENTATION: Tidal Station disk VM#: 22562
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete foundation of warehouse OPUS PID:
LATITUDE: 46° 9.6' N ( 46.15975) LONGITUDE: 123° 24.5' W (-123.40875)
The bench mark is a disk set flush in the concrete foundation of the oil storage
building, 15.8 m (51.8 ft) west of bench mark L, 13.3 M (43.6 ft) SE of the
roll-up door on the NE face of the oil storage building, 11.2 m (36.7 ft) NE of
the roll-up door on the SE face of the oil storage building, 0.36 m (1.2 ft)
north of the east corner of the oil storage building, and set 0.42 m (1.4 ft)
above grade.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 6
Station ID: 9439099 PUBLICATION DATE: 12/22/2023
Name: WAUNA, COLUMBIA RIVER
OR
NOAA Chart: 18523 Latitude: 46° 9.6' N ( 46.16000)
USGS Quad: CATHLAMET Longitude: 123° 24.3' W (-123.40500)
T I D A L D A T U M S
Tidal datums at WAUNA, COLUMBIA RIVER based on:
LENGTH OF SERIES: 6 Years
TIME PERIOD: July 2010 - September 2015 Low water months
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 (12/11/2015) = 3.764
MEAN HIGHER HIGH WATER MHHW = 2.428
MEAN HIGH WATER MHW = 2.249
MEAN TIDE LEVEL MTL = 1.398
MEAN SEA LEVEL MSL = 1.358
MEAN LOW WATER MLW = 0.547
MEAN LOWER LOW WATER MLLW = 0.353
COLUMBIA RIVER DATUM CRD = 0.000
LOWEST OBSERVED WATER LEVEL (09/06/2010) = -0.197
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MHW CRD
9099 H 1994 2.276 4.525
9099 M 2009 1.589 3.838
9099 N 2010 2.290 4.539
9099 P 2017 3.135 5.384
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 6
Station ID: 9439099 PUBLICATION DATE: 12/22/2023
Name: WAUNA, COLUMBIA RIVER
OR
NOAA Chart: 18523 Latitude: 46° 9.6' N ( 46.16000)
USGS Quad: CATHLAMET Longitude: 123° 24.3' W (-123.40500)
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 6 of 6
Station ID: 9439099 PUBLICATION DATE: 12/22/2023
Name: WAUNA, COLUMBIA RIVER
OR
NOAA Chart: 18523 Latitude: 46° 9.6' N ( 46.16000)
USGS Quad: CATHLAMET Longitude: 123° 24.3' W (-123.40500)
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.