U.S. DEPARTMENT OF COMMERCE
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National Ocean Service
Datums Page Page 1 of 8
Station ID: 9442396 PUBLICATION DATE: 10/15/2020
Name: LA PUSH, QUILLAYUTE RIVER
WA
NOAA Chart: 18480 Latitude: 47° 54.8' N ( 47.91333)
USGS Quad: LA PUSH Longitude: 124° 38.2' W (-124.63694)
To reach the La Push tide station from Seattle via automobile, cross Puget Sound
on a Ferry, and follow signs to the Hood Canal Bridge. After crossing the Hood
Canal, continue 23.8 km (14.8 mi) west on WA-104 to US 101, proceed 146.3 km
(90.9 mi) west on Highway 101, then take a right onto La Push Road., follow 22.4
km (13.9 mi) on La Push Road in La Push till it turns into Ocean Drive, continue
on Ocean Drive and take a left onto River Street followed by a right onto Main
Street. The tidal bench marks and tide gauge are located in the vicinity of the
Quileute Marina and Tribal School and the Coast Guard Station.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 2396 F 2005
DESIGNATION: 944 2396 F
MONUMENTATION: Flange-encased Rod VM#: 17867
AGENCY: National Ocean Service (NOS) IDB PID:
SETTING CLASSIFICATION: Stainless steel rod OPUS PID:
LATITUDE: 47° 54.6' N ( 47.91050) LONGITUDE: 124° 38.2' W (-124.63619)
The primary bench mark is a stainless steel rod located just south of the
entrance to the most southern series of floating platforms, 4.0 m (13.1 ft)
south of a 10 inch diameter cement post, 1.6 m (5.2 ft) east of the SE corner of
the platforms gangway, and 0.7 m (2.3 ft) north of the orange witness post. The
mark is set 0.15 (0.5 ft) m below the natural grade, the top of a stainless
steel rod driven 16.1 m (52.8 ft) to refusal.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 8
Station ID: 9442396 PUBLICATION DATE: 10/15/2020
Name: LA PUSH, QUILLAYUTE RIVER
WA
NOAA Chart: 18480 Latitude: 47° 54.8' N ( 47.91333)
USGS Quad: LA PUSH Longitude: 124° 38.2' W (-124.63694)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: NO 7 1955
DESIGNATION: 944 2396 TIDAL 7
MONUMENTATION: Tidal Station disk VM#: 16894
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: SD0158
SETTING CLASSIFICATION: Concrete block OPUS PID#: SD0158
LATITUDE: 47° 54.5' N ( 47.90861) LONGITUDE: 124° 38.3' W (-124.63800)
The bench mark is a disk embedded flush in a concrete block which is square with
a width of 0.91 m (2.99 ft) (formerly the foundation of a lookout tower),
located on the W side of a two-story brown and red school house (formerly the
Coast Guard Administration Building), 11.40 m (37.4 ft) W of the N rail of a
wheel chair ramp leading into the school, 11.28 m (37.0 ft) NE of a the NE
corner of a concrete stairway leading down a grassy hill, 3.38 m (11.1 ft) SE of
the telephone pole 2815- 287806, and 0.76 m (2.49 ft) E of the N-S sidewalk.
BENCH MARK STAMPING: 2396 A 2002
DESIGNATION: 944 2396 A
MONUMENTATION: Tidal Station disk VM#: 16896
AGENCY: National Ocean Service (NOS) IDB PID:
SETTING CLASSIFICATION: Concrete sea wall OPUS PID:
LATITUDE: 47° 54.6' N ( 47.90992) LONGITUDE: 124° 38.2' W (-124.63711)
The bench mark is a disk embedded flush in the top of a concrete sea wall
located on the south end of the Quileute Marina, 8.27 m (27.13 ft) north of the
NE corner of the marina gas pump foundation, 3.92 m (12.9 ft) WSW of the NW
corner of a gray Harbor Master Maintenance Building, 1.41 m (4.6 ft) ENE of the
NE corner of the above ground 8000 gallon concrete fuel tank.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 8
Station ID: 9442396 PUBLICATION DATE: 10/15/2020
Name: LA PUSH, QUILLAYUTE RIVER
WA
NOAA Chart: 18480 Latitude: 47° 54.8' N ( 47.91333)
USGS Quad: LA PUSH Longitude: 124° 38.2' W (-124.63694)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 2396 B 2002
DESIGNATION: 944 2396 B
MONUMENTATION: Tidal Station disk VM#: 16897
AGENCY: National Ocean Service (NOS) IDB PID:
SETTING CLASSIFICATION: Concrete sea wall OPUS PID:
LATITUDE: 47° 54.6' N ( 47.90956) LONGITUDE: 124° 38.3' W (-124.63825)
The bench mark is a disk embedded flush in the top section of a concrete sea
wall located seaward of the Quileute Seafood Company Warehouse, 20.98 m (68.8
ft) NE of the SW end of the sea wall, 5.93 m (19.5 ft) SW of the SW corner of
the Quileute Seafood Company ice plant, 4.54 m (14.9 ft) NW of the NW corner of
the Quileute Seafood company processing warehouse, and 0.45 m (1.5 ft) above the
concrete apron that surrounds the warehouse.
BENCH MARK STAMPING: 2396 D 2005
DESIGNATION: 944 2396 D
MONUMENTATION: Tidal Station disk VM#: 17866
AGENCY: National Ocean Service (NOS) IDB PID:
SETTING CLASSIFICATION: Concrete sea wall OPUS PID:
LATITUDE: 47° 54.6' N ( 47.90992) LONGITUDE: 124° 38.2' W (-124.63664)
The bench mark is a disk set flush in the top of a 0.5 m x 0.5 m concrete column
which supports a 25.78 m (l) x 4 m (h) x 0.3 m (w) concrete sea wall east of the
Quileute Marina office, between Main Street and the marina, 18.30 m (5.6 ft) NE
from the SW end of the sea wall, 17.37 m (5.3 ft) west from the centerline of
Main Street, and 7.48 m (2.3 ft) SW from the NE end of the sea wall.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 8
Station ID: 9442396 PUBLICATION DATE: 10/15/2020
Name: LA PUSH, QUILLAYUTE RIVER
WA
NOAA Chart: 18480 Latitude: 47° 54.8' N ( 47.91333)
USGS Quad: LA PUSH Longitude: 124° 38.2' W (-124.63694)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 2396 G 2005
DESIGNATION: 944 2396 G
MONUMENTATION: Flange-encased Rod VM#: 17868
AGENCY: National Ocean Service (NOS) IDB PID:
SETTING CLASSIFICATION: Stainless steel rod OPUS PID#: BBBL38
LATITUDE: 47° 54.7' N ( 47.91158) LONGITUDE: 124° 38.1' W (-124.63569)
The bench mark is a stainless steel deep rod located just S of the Quileute
Marina boat ramp, 3.7 m (12.1 ft) N of a utility pole, 2.8 m (9.2 ft) W of the
centerline of the asphalt walk, and 0.62 m (2.0 ft) E of the orange witness
post. The mark is set 0.15 m (0.5 ft) below the natural grade, the top of a
stainless steel rod driven 16.6 m (54.5 ft) to refusal.
BENCH MARK STAMPING: 2396 E 2005
DESIGNATION: 944 2396 E
MONUMENTATION: Tidal Station disk VM#: 17869
AGENCY: National Ocean Service (NOS) IDB PID:
SETTING CLASSIFICATION: Concrete landing OPUS PID:
LATITUDE: 47° 54.7' N ( 47.91183) LONGITUDE: 124° 38.1' W (-124.63550)
The bench mark is a disk set flush in the SE corner of the concrete landing
leading to the floating pier just north of the Quileute Marina boat ramp, 19.75
m (64.8 ft) SE of the eastern most piling of the attached floating pier, 12.70 m
(41.7 ft) SW of utility pole 219 150, and 0.28 m (0.9 ft) north of the southern
most edge of the concrete landing.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 8
Station ID: 9442396 PUBLICATION DATE: 10/15/2020
Name: LA PUSH, QUILLAYUTE RIVER
WA
NOAA Chart: 18480 Latitude: 47° 54.8' N ( 47.91333)
USGS Quad: LA PUSH Longitude: 124° 38.2' W (-124.63694)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 2396 H 2005
DESIGNATION: 944 2396 H
MONUMENTATION: Flange-encased Rod VM#: 17870
AGENCY: National Ocean Service (NOS) IDB PID:
SETTING CLASSIFICATION: Stainless steel rod OPUS PID:
LATITUDE: 47° 54.8' N ( 47.91306) LONGITUDE: 124° 38.1' W (-124.63506)
The bench mark is a stainless steel deep rod located just E of the Coast Guard
boathouse, 12.6 m (41.3 ft) E of a large pine tree, 4.5 m (14.8 ft) N of a
utility pole, 2.7 m (8.9 ft) W of the centerline of the concrete sidewalk, and
0.45 m (1.5 ft) E of the orange witness post. The mark is set 0.15 m (0.5 ft)
below the natural grade, the top of a stainless steel deep rod driven 12.4 m
(40.8 ft) to refusal.
BENCH MARK STAMPING: 2396 J 2008
DESIGNATION: 944 2396 J
MONUMENTATION: Tidal Station disk VM#: 19240
AGENCY: National Ocean Service (NOS) IDB PID:
SETTING CLASSIFICATION: Concrete foundation OPUS PID:
LATITUDE: 47° 54.8' N ( 47.91342) LONGITUDE: 124° 38.2' W (-124.63656)
The bench mark is set flush in a large 1.83 m X 1.9 m X 0.3 m thick concrete
foundation. The mark is located just west of the Coast Guard boathouse and just
southwest of the Quileute Nation Natural Resources building, 33.05 m (108.4 ft)
west of the NW corner of the Quileute Natural Resources building, 1.77 m. (5.8
ft) east of the NW corner of the .83 m X 1.9 m X 0.3 m thick concrete foundation
for the La Push MET station, 0.95 m. (3.1 ft) north of the SE corner of the .83
m X 1.9 m X 0.3 m thick concrete foundation, and is 0.3 m (1.0 ft) above grade.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 8
Station ID: 9442396 PUBLICATION DATE: 10/15/2020
Name: LA PUSH, QUILLAYUTE RIVER
WA
NOAA Chart: 18480 Latitude: 47° 54.8' N ( 47.91333)
USGS Quad: LA PUSH Longitude: 124° 38.2' W (-124.63694)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 2396 K 2016
DESIGNATION: 944 2396 K
MONUMENTATION: Tidal Station disk VM#: 21904
AGENCY: National Ocean Service (NOS) IDB PID:
SETTING CLASSIFICATION: Concrete slab OPUS PID:
LATITUDE: 47° 54.6' N ( 47.90947) LONGITUDE: 124° 38.1' W (-124.63527)
The bench mark is a disk set flush in a 4.5m (14.8 ft) x 6.7m (22.0 ft) concrete
pad at the intersection of Spruce St and Quilleute Nation St, 10.17m (33.4 ft) N
of a fire hydrant, 7.56m (24.8 ft) E of power pole 2815 288813, and 7.2m (23.6
ft) SE of a sewer manhole.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 7 of 8
Station ID: 9442396 PUBLICATION DATE: 10/15/2020
Name: LA PUSH, QUILLAYUTE RIVER
WA
NOAA Chart: 18480 Latitude: 47° 54.8' N ( 47.91333)
USGS Quad: LA PUSH Longitude: 124° 38.2' W (-124.63694)
T I D A L D A T U M S
Tidal datums at LA PUSH, QUILLAYUTE RIVER based on:
LENGTH OF SERIES: 11 YEARS
TIME PERIOD: 1/05-12/08, 10/10-9/14, 3/15-2/18
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 (02/04/2006) = 3.871
MEAN HIGHER HIGH WATER MHHW = 2.597
MEAN HIGH WATER MHW = 2.381
MEAN TIDE LEVEL MTL = 1.400
MEAN SEA LEVEL MSL = 1.394
North American Vertical Datum NAVD88 = 0.440
MEAN LOW WATER MLW = 0.418
MEAN LOWER LOW WATER MLLW = 0.000
LOWEST OBSERVED WATER LEVEL (05/07/2008) = -1.095
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
2396 F 2005 3.801 1.420
NO 7 1955 8.823 6.442
2396 A 2002 4.674 2.293
2396 B 2002 4.969 2.588
2396 D 2005 3.643 1.262
2396 G 2005 3.862 1.481
2396 E 2005 3.891 1.510
2396 H 2005 3.757 1.376
2396 J 2008 4.504 2.123
2396 K 2016 5.272 2.891
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 8 of 8
Station ID: 9442396 PUBLICATION DATE: 10/15/2020
Name: LA PUSH, QUILLAYUTE RIVER
WA
NOAA Chart: 18480 Latitude: 47° 54.8' N ( 47.91333)
USGS Quad: LA PUSH Longitude: 124° 38.2' W (-124.63694)
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.