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National Ocean Service
Datums Page Page 1 of 7
Station ID: 9441187 PUBLICATION DATE: 05/15/2003
Name: ABERDEEN
WA
NOAA Chart: 18502 Latitude: 46° 58.1' N ( 46.96830)
USGS Quad: ABERDEEN Longitude: 123° 51.3' W (-123.85500)
To reach the bench marks from the intersection of North Maple Street and U.S.
Highway 101 in the town of Aberdeen, proceed south on North Maple Street for 1
km (0.6 mi) to Industrial Road, then turn right and proceed NW on Industrial
Road for 0.5 km (0.3 mi) to Terminal 1 on the SW side of Industrial Road. The
bench marks are along Industrial Road and at the Bay City Fuel Company Union 76
Storage Plant, at 640 Myrtle Street. The tide station was across from the Corps
of Engineers floating pier on the south side of Slip No. 1.
T I D A L B E N C H M A R K S
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 7
Station ID: 9441187 PUBLICATION DATE: 05/15/2003
Name: ABERDEEN
WA
NOAA Chart: 18502 Latitude: 46° 58.1' N ( 46.96830)
USGS Quad: ABERDEEN Longitude: 123° 51.3' W (-123.85500)
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 2 1927
DESIGNATION: TIDAL 2
MONUMENTATION: Bench Mark disk VM#: 8992
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: SC0794
SETTING CLASSIFICATION: Concrete block OPUS PID:
LATITUDE: 46° 58.2' N ( 46.97000) LONGITUDE: 123° 51.1' W (-123.85200)
The primary bench mark is a disk set in the top of a 3 m (10 ft) octagonal
concrete block covered with dirt and rock at the NE corner of the intersection
of Industrial Road and Myrtle Street, 16 m (51 ft) SW of SW corner of the
concrete base of a large cylindrical propane tank, 11.43 m (37.5 ft) NE of the
centerline of Industrial Road, 9.91 m (32.5 ft) east of the centerline of Myrtle
Street, and 2.19 m (7.2 ft) north of a witness post.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 7
Station ID: 9441187 PUBLICATION DATE: 05/15/2003
Name: ABERDEEN
WA
NOAA Chart: 18502 Latitude: 46° 58.1' N ( 46.96830)
USGS Quad: ABERDEEN Longitude: 123° 51.3' W (-123.85500)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 5 1934
DESIGNATION: TIDAL 5
MONUMENTATION: Bench Mark disk VM#: 8993
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: SC0793
SETTING CLASSIFICATION: Concrete retaining wall OPUS PID:
LATITUDE: 46° 58.1' N ( 46.96830) LONGITUDE: 123° 51.0' W (-123.85000)
The bench mark is a disk set in the top of the south corner of a concrete wall
surrounding the Union Oil Company storage tank farm, 91 m (300 ft) NW of the
intersection of Industrial Road and West First Street, 33 m (107 ft) NE of the
centerline of Industrial Road, 21 m (70 ft) SW of the SW corner of the Union Oil
Company boiler house, and 1.37 m (4.5 ft) above ground level. NOTE: The bench
mark is covered by the fourth plank north of the southern edge of the wooden
loading platform and is accessible by removing a 3 inch quare wooden plug set in
the top of the platform at the head of the stairs.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 7
Station ID: 9441187 PUBLICATION DATE: 05/15/2003
Name: ABERDEEN
WA
NOAA Chart: 18502 Latitude: 46° 58.1' N ( 46.96830)
USGS Quad: ABERDEEN Longitude: 123° 51.3' W (-123.85500)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 3 1939
DESIGNATION: TIDAL 3
MONUMENTATION: Bench Mark disk VM#: 8994
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: SC0795
SETTING CLASSIFICATION: Concrete foundation OPUS PID:
LATITUDE: 46° 58.1' N ( 46.96830) LONGITUDE: 123° 51.3' W (-123.85500)
The bench mark is a disk set in the SW corner of the concrete pad for the
westernmost one of a group of six cylindrical oil tanks at the Bay City Fuel
Company Union 76 Storage Plant at 640 Myrtle Street, 88 m (290 ft) NW of the
Myrtle Street/Northern Pacific Railway intersection, 73 m (240 ft) west of the
centerline of Myrtle Street, 15 m (48 ft) north of the chain link fence on the
plants south boundary, and 11 m (35 ft) east of chain link fence on plants west
boundary.
BENCH MARK STAMPING: 1187 A 1982
DESIGNATION: 944 1187 A
MONUMENTATION: Tidal Station disk VM#: 8995
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Retaining wall OPUS PID:
LATITUDE: 46° 58.1' N ( 46.96830) LONGITUDE: 123° 51.2' W (-123.85300)
The bench mark is a disk set flush in top of the SE corner of a retaining wall
around the oil tanks at the Bay City Fuel Company Union 76 Storage Plant at 640
Myrtle Street, 44.35 m (145.5 ft) east of chain link fence on plants west
boundary, 39.47 m (129.5 ft) west of centerline of Myrtle Street, 12.04 m (39.5
ft) north of a chain link fence on the plant's southern boundary, 1.07 m (3.5
ft) west of the northernmost of two SW corners, and about 1 m (4 ft) above
ground level.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 7
Station ID: 9441187 PUBLICATION DATE: 05/15/2003
Name: ABERDEEN
WA
NOAA Chart: 18502 Latitude: 46° 58.1' N ( 46.96830)
USGS Quad: ABERDEEN Longitude: 123° 51.3' W (-123.85500)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 1187 B 1982
DESIGNATION: 944 1187 B
MONUMENTATION: Tidal Station disk VM#: 8996
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete pad OPUS PID:
LATITUDE: 46° 58.1' N ( 46.96830) LONGITUDE: 123° 51.2' W (-123.85300)
The bench mark is a disk set in the SW corner of the concrete pad for the most
SE oil tank at the Bay City Fuel Company Union 76 Storage Plant at 640 Myrtle
Street, 60 m (198 ft) west of the centerline of Myrtle Street, 23 m (77 ft) east
of the chain link fence on the plants boundary, 10 m (34 ft) north of the chain
link fence on the plants south boundary, 8 m (25 ft) west of the south concrete
retaining wall, 0.3 m (1.0 ft) north of the south edge of the pad, and 0.3 m
(1.0 ft) east of the west edge of the pad.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 7
Station ID: 9441187 PUBLICATION DATE: 05/15/2003
Name: ABERDEEN
WA
NOAA Chart: 18502 Latitude: 46° 58.1' N ( 46.96830)
USGS Quad: ABERDEEN Longitude: 123° 51.3' W (-123.85500)
T I D A L D A T U M S
Tidal datums at ABERDEEN based on:
LENGTH OF SERIES: 1 YEAR
TIME PERIOD: June 1982 - May 1983
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION: 9440910 TOKE POINT, WILLAPA BAY
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
HIGHEST OBSERVED WATER LEVEL (12/03/1982) = 4.224
MEAN HIGHER HIGH WATER MHHW = 3.081
MEAN HIGH WATER MHW = 2.869
MEAN SEA LEVEL MSL = 1.708
MEAN TIDE LEVEL MTL = 1.659
North American Vertical Datum NAVD88 = 0.500
MEAN LOW WATER MLW = 0.449
MEAN LOWER LOW WATER MLLW = 0.000
LOWEST OBSERVED WATER LEVEL (07/22/1982) = -1.021
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
2 1927 4.686 1.817
5 1934 6.035 3.166
3 1939 4.892 2.023
1187 A 1982 5.712 2.843
1187 B 1982 4.895 2.026
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 7 of 7
Station ID: 9441187 PUBLICATION DATE: 05/15/2003
Name: ABERDEEN
WA
NOAA Chart: 18502 Latitude: 46° 58.1' N ( 46.96830)
USGS Quad: ABERDEEN Longitude: 123° 51.3' W (-123.85500)
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.