U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 5
Station ID: 9446969 PUBLICATION DATE: 07/02/2003
Name: OLYMPIA, BUD INLET, PUGET SOUND
WA
NOAA Chart: 18456 Latitude: 47° 3.6' N ( 47.06000)
USGS Quad: TUMWATER Longitude: 122° 54.2' W (-122.90300)
To reach the tidal bench marks from the intersection of Columbia Street and C
Avenue in Olympia, proceed NNW on Columbia Street extension for 0.2 km (0.1 mi)
to the extreme SW corner of Port of Olympia Wharf. The bench marks are in the
vicinity of the wharf and the tide gage and staff were located on the Port of
Olympia wharf.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 14 1935
DESIGNATION: 944 6969 TIDAL 14
MONUMENTATION: Tidal Station disk VM#: 9188
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: SY0866
SETTING CLASSIFICATION: Concrete block OPUS PID:
LATITUDE: 47° 3.1' N ( 47.05170) LONGITUDE: 122° 54.3' W (-122.90500)
The primary bench mark is a disk set in the top of a concrete block, 0.3 km (0.2
mi) NNW of the intersection of North Capitol Way and B Avenue at Port of Olympia
wharf, 77 m (254 ft) north of the south end of the wharf, 50.75 m (166.5 ft) SSE
of the SE corner of a transit shed, 43 m (141 ft) east of the west edge of the
wharf, 42 m (137 ft) south of the SW corner of the port shop building, 41.67 m
(136.7 ft) south of bench mark 15 1935, and access to the mark is through a
6-inch pipe with an 8-inch case iron cover.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 5
Station ID: 9446969 PUBLICATION DATE: 07/02/2003
Name: OLYMPIA, BUD INLET, PUGET SOUND
WA
NOAA Chart: 18456 Latitude: 47° 3.6' N ( 47.06000)
USGS Quad: TUMWATER Longitude: 122° 54.2' W (-122.90300)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 8 1923
DESIGNATION: 944 6969 TIDAL 8
MONUMENTATION: Tidal Station disk VM#: 9185
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: SY0867
SETTING CLASSIFICATION: Concrete wall OPUS PID:
LATITUDE: 47° 3.0' N ( 47.05000) LONGITUDE: 122° 54.1' W (-122.90200)
The bench mark is a disk set vertically in the west face of a concrete wall
around Standard Oil Company storage tanks, 79 m (260 ft) north of the north curb
of B Avenue, 0.98 m (3.2 ft) south of the NW corner of the wall, and 0.61 m (2.0
ft) east of the center of a fire hydrant.
BENCH MARK STAMPING: 9 1923
DESIGNATION: 944 6969 TIDAL 9
MONUMENTATION: Tidal Station disk VM#: 9186
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: SY0868
SETTING CLASSIFICATION: Concrete wall OPUS PID:
LATITUDE: 47° 3.0' N ( 47.05000) LONGITUDE: 122° 54.2' W (-122.90300)
The bench mark is a disk set vertically in the north face of a concrete wall
around the Standard Oil Company storage tanks, 79 m (260 ft) north of the north
curb of B Avenue, 9.60 m (31.5 ft) west of the west curb of Capitol Way, 5.79 m
(19.0 ft) west of the NE corner of the wall, and 1.22 m (4.0 ft) below the top
of the wall.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 5
Station ID: 9446969 PUBLICATION DATE: 07/02/2003
Name: OLYMPIA, BUD INLET, PUGET SOUND
WA
NOAA Chart: 18456 Latitude: 47° 3.6' N ( 47.06000)
USGS Quad: TUMWATER Longitude: 122° 54.2' W (-122.90300)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 11 1923
DESIGNATION: 944 6969 TIDAL 11
MONUMENTATION: Tidal Station disk VM#: 9187
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: SY0869
SETTING CLASSIFICATION: Concrete wall OPUS PID:
LATITUDE: 47° 2.7' N ( 47.04500) LONGITUDE: 122° 54.1' W (-122.90200)
The bench mark is a disk set vertically in the east concrete wall of the Olympia
Fire Station building, 21 m (69 ft) north of the north curb of the State Avenue,
4 m (12 ft) west of the west curb of the North Capitol Way, 0.55 m (1.8 ft)
south of the NE corner of the building and 0.3 m (1 ft) above ground level.
BENCH MARK STAMPING: 15 1935
DESIGNATION: 944 6969 TIDAL 15
MONUMENTATION: Tidal Station disk VM#: 9189
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: SY0865
SETTING CLASSIFICATION: Concrete foundation OPUS PID:
LATITUDE: 47° 3.1' N ( 47.05130) LONGITUDE: 122° 54.2' W (-122.90400)
The bench mark is a disk set in the top and 0.15 m (0.5 ft) NE of the SW corner
of the concrete foundation of the shop building, 44 m (146 ft) east of the east
edge of the wharf, 41.67 m (136.7 ft) north of bench mark 14 1935, 18.87 m (61.9
ft) ESE of the SE corner of a transit shed, and level with the ground.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 5
Station ID: 9446969 PUBLICATION DATE: 07/02/2003
Name: OLYMPIA, BUD INLET, PUGET SOUND
WA
NOAA Chart: 18456 Latitude: 47° 3.6' N ( 47.06000)
USGS Quad: TUMWATER Longitude: 122° 54.2' W (-122.90300)
T I D A L D A T U M S
Tidal datums at OLYMPIA, BUD INLET, PUGET SOUND based on:
LENGTH OF SERIES: 1 Year
TIME PERIOD: April 1977 - March 1978
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION: 9447130 SEATTLE, PUGET SOUND
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
HIGHEST OBSERVED WATER LEVEL (12/15/1977) = 5.468
MEAN HIGHER HIGH WATER MHHW = 4.437
MEAN HIGH WATER MHW = 4.129
MEAN SEA LEVEL MSL = 2.546
MEAN TIDE LEVEL MTL = 2.532
North American Vertical Datum NAVD88 = 1.227
MEAN LOW WATER MLW = 0.935
MEAN LOWER LOW WATER MLLW = 0.000
LOWEST OBSERVED WATER LEVEL (01/02/1977) = -1.320
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
14 1935 5.052 0.923
8 1923 5.344 1.215
9 1923 5.420 1.291
11 1923 6.056 1.927
15 1935 5.154 1.025
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 5
Station ID: 9446969 PUBLICATION DATE: 07/02/2003
Name: OLYMPIA, BUD INLET, PUGET SOUND
WA
NOAA Chart: 18456 Latitude: 47° 3.6' N ( 47.06000)
USGS Quad: TUMWATER Longitude: 122° 54.2' W (-122.90300)
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.