U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 6
Station ID: 9437585 PUBLICATION DATE: 12/07/2016
Name: NORTH JETTY, TILLAMOOK BAY
OR
NOAA Chart: 18558 Latitude: 45° 34.2' N ( 45.57000)
USGS Quad: GARIBALDI Longitude: 123° 57.9' W (-123.96500)
From the intersection of State Highway 6 and US Highway 101 in Tillamook,
proceed north and then west on US Highway 101 for 19.2 km (11.9 mi) to the
intersection with Cedar Street in Barview, turn left and proceed west on Cedar
Street for 0.2 km (0.1 mi) to the entrance for Barview Jetty Park on the right,
turn right and proceed NW and then SW 1.1 km (0.7 mi) following the main Barview
Jetty Road through the campground to the gravel parking area at the base of the
North Jetty. The tide station is behind the first set of large boulders
blocking vechicle access to the jetty, and the bench marks are in the park along
the road and rock rip rap.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 7585 A 2016
DESIGNATION: 943 7585 A
MONUMENTATION: Flange-encased Rod VM#: 21923
AGENCY: National Ocean Service IDB PID#:
SETTING CLASSIFICATION: OPUS PID#: BBFF58
LATITUDE: 45° 34.3' N ( 45.57147) LONGITUDE: 123° 57.3' W (-123.95583)
The primary bench mark is a flange encased rod set in the grass on top of the S
edge of a hill 88.1 m (289.0 ft) NNW of the NW corner of a restroom, 10.18 m
(33.4 ft) SSE of the center of the back of a permanent park bench, and 8.73 m
(28.6 ft) E of the centerline of a gravel foot path to top of hill. The datum
point is set 9 cm (4 inches) below ground, being the top of a stainless steel
rod driven 20.12 m (66.0 ft) to refusal, in a sleeve extending to a depth of 0.9
m (3.0 ft) and encased in a 6-inch (15 cm) NOS logo cap with concrete kick
block.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 6
Station ID: 9437585 PUBLICATION DATE: 12/07/2016
Name: NORTH JETTY, TILLAMOOK BAY
OR
NOAA Chart: 18558 Latitude: 45° 34.2' N ( 45.57000)
USGS Quad: GARIBALDI Longitude: 123° 57.9' W (-123.96500)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: BARVIEW NO 3 1954
DESIGNATION: BARVIEW RM 3
MONUMENTATION: Reference Mark disk VM#: 21924
AGENCY: US Coast and Geodetic Survey IDB PID#: RD1445
SETTING CLASSIFICATION: OPUS PID:
LATITUDE: 45° 34.3' N ( 45.57086) LONGITUDE: 123° 57.2' W (-123.95286)
The bench mark is a disk set in a concrete monument 18.41 m (60.4 ft) WSW of a
sign at intersection with gravel road warning of ocean hazards, 8.52 m (28.0 ft)
E of a speed limit sign on S side of road, 7.22 m (23.7 ft) SSE of the
centerline of paved park road, 0.27 m (0.9 ft) E of a carsonite witness post,
and about 5 cm (2 inches) higher than the ground.
BENCH MARK STAMPING: NO 3 1957
DESIGNATION: 943 7581 TIDAL 3
MONUMENTATION: Tidal Station disk VM#: 21925
AGENCY: US Coast and Geodetic Survey IDB PID#: RD1442
SETTING CLASSIFICATION: OPUS PID:
LATITUDE: 45° 34.1' N ( 45.56847) LONGITUDE: 123° 56.6' W (-123.94292)
The bench mark is a disk set in a rock at the top of the rip rap along the
channel, 27.8 m (91.2 ft) ESE of the SE corner of the house closest to the
channel with stone work foundation, 26.4 m (86.6 ft) SW of the W rail of
railroad tracks, and 13.95 m (45.8 ft) SSE of the SE corner of concrete pad for
utilities.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 6
Station ID: 9437585 PUBLICATION DATE: 12/07/2016
Name: NORTH JETTY, TILLAMOOK BAY
OR
NOAA Chart: 18558 Latitude: 45° 34.2' N ( 45.57000)
USGS Quad: GARIBALDI Longitude: 123° 57.9' W (-123.96500)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 7585 C 2016
DESIGNATION: 943 7585 C
MONUMENTATION: Tidal Station disk VM#: 21926
AGENCY: National Ocean Service IDB PID#:
SETTING CLASSIFICATION: OPUS PID:
LATITUDE: 45° 34.1' N ( 45.56856) LONGITUDE: 123° 56.7' W (-123.94436)
The bench mark is a disk set in a rock outcrop near an abandoned concrete
structure where the rip rap is adjacent to a rock bluff, 61.0 m (200.1 ft) SE of
the S edge of paved parking area, 25.9 m (85.0 ft) SE of a point of the rock
slope bluff, 3.57 m (11.7 ft) SE of the NE corner of concrete platform, 2.17 m
(7.1 ft) NNE of the SE corner of concrete platform, and 1.07 m (3.5 ft) E of the
E side of the concrete platform.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 6
Station ID: 9437585 PUBLICATION DATE: 12/07/2016
Name: NORTH JETTY, TILLAMOOK BAY
OR
NOAA Chart: 18558 Latitude: 45° 34.2' N ( 45.57000)
USGS Quad: GARIBALDI Longitude: 123° 57.9' W (-123.96500)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: BARVIEW 1926
DESIGNATION: BARVIEW
MONUMENTATION: Triangulation Station disk VM#: 21927
AGENCY: US Coast and Geodetic Survey IDB PID#: RD1443
SETTING CLASSIFICATION: OPUS PID:
LATITUDE: 45° 34.2' N ( 45.57069) LONGITUDE: 123° 57.2' W (-123.95303)
The bench mark is a disk set in concrete in a red clay tile pipe 25.32 m (83.1
ft) NW of the centerline of the smaller road heading SW, 15.75 m (51.7 ft) S of
the centerline of Barview Jetty road, and about 0.06 m (0.2 ft) higher than the
ground.
BENCH MARK STAMPING: 7585 B 2016
DESIGNATION: 943 7585 B
MONUMENTATION: Flange-encased Rod VM#: 21928
AGENCY: National Ocean Service IDB PID#:
SETTING CLASSIFICATION: OPUS PID:
LATITUDE: 45° 34.2' N ( 45.56942) LONGITUDE: 123° 56.8' W (-123.94697)
The bench mark is a flange encased rod set among vegetation above the beach,
89.2 m (292.7 ft) WSW of park road, 9.55 m (31.3 ft) NNW of the beach debris,
and 0.58 m (1.9 ft) SE of a carsonite witness post. The datum point is set 10
cm (4 inches) below ground, being the top of a stainless steel rod driven 21.34
m (70.0 ft) to refusal, in a sleeve extending to a depth of 0.91 m (3.0 ft) and
encased in a 6-inch (15 cm) NOS logo cap with concrete kick block.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 6
Station ID: 9437585 PUBLICATION DATE: 12/07/2016
Name: NORTH JETTY, TILLAMOOK BAY
OR
NOAA Chart: 18558 Latitude: 45° 34.2' N ( 45.57000)
USGS Quad: GARIBALDI Longitude: 123° 57.9' W (-123.96500)
T I D A L D A T U M S
Tidal datums at NORTH JETTY, TILLAMOOK BAY based on:
LENGTH OF SERIES: 3 MONTHS
TIME PERIOD: June 2016 - August 2016
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION: 9437540 Garibaldi, Tillamook Bay
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
MEAN HIGHER HIGH WATER MHHW = 2.451
MEAN HIGH WATER MHW = 2.241
MEAN TIDE LEVEL MTL = 1.325
MEAN SEA LEVEL MSL = 1.300
MEAN LOW WATER MLW = 0.409
North American Vertical Datum NAVD88 = 0.124
MEAN LOWER LOW WATER MLLW = 0.000
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
7585 A 2016 9.996 7.755
BARVIEW NO 3 1954 5.009 2.768
NO 3 1957 5.127 2.886
7585 C 2016 6.816 4.575
BARVIEW 1926 4.873 2.632
7585 B 2016 4.474 2.233
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 6
Station ID: 9437585 PUBLICATION DATE: 12/07/2016
Name: NORTH JETTY, TILLAMOOK BAY
OR
NOAA Chart: 18558 Latitude: 45° 34.2' N ( 45.57000)
USGS Quad: GARIBALDI Longitude: 123° 57.9' W (-123.96500)
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.