U.S. DEPARTMENT OF COMMERCE
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National Ocean Service
Datums Page Page 1 of 8
Station ID: 9437262 PUBLICATION DATE: 07/02/2003
Name: NETARTS, NETARTS BAY
OR
NOAA Chart: 18520 Latitude: 45° 25.8' N ( 45.43000)
USGS Quad: TILLAMOOK Longitude: 123° 56.7' W (-123.94500)
To reach the tidal bench marks from the intersection of Netarts Highway (State
Route 131) and Netarts Bay Road in Netarts, proceed SW on Netarts Bay Drive for
0.2 km (0.1 mi) to Netarts Basin Boat Road and the Tillamook County Boat
Landing. The bench marks are located along Netarts Basin Boat Road and Route
131. The tide station was located on the Tillamook County Boat Dock.
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 8
Station ID: 9437262 PUBLICATION DATE: 07/02/2003
Name: NETARTS, NETARTS BAY
OR
NOAA Chart: 18520 Latitude: 45° 25.8' N ( 45.43000)
USGS Quad: TILLAMOOK Longitude: 123° 56.7' W (-123.94500)
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 943 7262 A 1977
DESIGNATION: 943 7262 A
ALIAS: NO 3
MONUMENTATION: Tidal Station disk VM#: 8854
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Unspecified deep rod OPUS PID:
LATITUDE: 45° 25.8' N ( 45.43000) LONGITUDE: 123° 56.7' W (-123.94500)
The primary bench mark is a disk located near the intersection of Netarts Basin
Boat Road and Netarts Bay Drive, 109 m (358 ft) WNW of bench mark 943 7262
UNSTAMPED 1, 23 m (77 ft) NE of utility pole #BX81-L3-SP1, 6 m (20 ft) NE of the
centerline of Netarts Basin Boat Road, and 0.15 m (0.5 ft) south of a witness
post. The bench mark is crimped to the top of an unspecified rod driven 5.5 m
(18 ft) to refusal, and encased in a 4-inch PVC pipe and concrete kickblock.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 8
Station ID: 9437262 PUBLICATION DATE: 07/02/2003
Name: NETARTS, NETARTS BAY
OR
NOAA Chart: 18520 Latitude: 45° 25.8' N ( 45.43000)
USGS Quad: TILLAMOOK Longitude: 123° 56.7' W (-123.94500)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 943 7262 B 1977
DESIGNATION: 943 7262 B
ALIAS: NO 4
MONUMENTATION: Tidal Station disk VM#: 8855
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Unspecified deep rod OPUS PID:
LATITUDE: 45° 25.8' N ( 45.43000) LONGITUDE: 123° 56.7' W (-123.94500)
The bench mark is a disk located near the intersection of Netarts Highway and
Netarts Bay Drive, 15.39 m (50.5 ft) south of the centerline of Netarts Highway,
13.87 m (45.5 ft) NW of utility pole #BX81, 6 m (21 ft) west of the centerline
of Netarts Bay Drive, 4 m (13 ft) west of the schooner (Captains Room) sign, and
0.15 m (0.5 ft) south of a witness post. The bench mark is crimped to the top
of an unspecified rod driven 13.4 m (44 ft) to refusal, and encased in a 4-inch
PVC pipe and concrete kickblock.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 8
Station ID: 9437262 PUBLICATION DATE: 07/02/2003
Name: NETARTS, NETARTS BAY
OR
NOAA Chart: 18520 Latitude: 45° 25.8' N ( 45.43000)
USGS Quad: TILLAMOOK Longitude: 123° 56.7' W (-123.94500)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 943 7262 C 1977
DESIGNATION: 943 7262 C
ALIAS: NO 5
MONUMENTATION: Tidal Station disk VM#: 8856
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Unspecified deep rod OPUS PID:
LATITUDE: 45° 25.8' N ( 45.43000) LONGITUDE: 123° 56.7' W (-123.94500)
The bench mark is a disk located along Netarts Highway, 12 m (38 ft) north of
the centerline of Netarts Highway, 10 m (33 ft) west of an unnumbered utility
pole, 4.42 m (14.5 ft) west of the centerline of Silven Sand Road, and 0.15 m
(0.5 ft) south of a witness post. The bench mark is crimped to the top of an
unspecified rod driven 5.5 m (18 ft) to refusal, and encased in a 4-inch PVC
pipe and concrete kickblock.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 8
Station ID: 9437262 PUBLICATION DATE: 07/02/2003
Name: NETARTS, NETARTS BAY
OR
NOAA Chart: 18520 Latitude: 45° 25.8' N ( 45.43000)
USGS Quad: TILLAMOOK Longitude: 123° 56.7' W (-123.94500)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING:
DESIGNATION: 943 7262 UNSTAMPED 1
ALIAS: NO STAMPING 1
MONUMENTATION: Survey disk VM#: 8857
AGENCY: Oregon State Highway Department IDB PID#:
SETTING CLASSIFICATION: Concrete curb OPUS PID:
LATITUDE: 45° 25.8' N ( 45.43000) LONGITUDE: 123° 56.7' W (-123.94500)
The bench mark is a disk set flush in the eastern concrete curb at the Tillamook
Boat Landing launching ramp, 6.25 m (20.5 ft) west of the NW corner of the
restroom building, and 3 m (9 ft) south of the north end of the curb.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 8
Station ID: 9437262 PUBLICATION DATE: 07/02/2003
Name: NETARTS, NETARTS BAY
OR
NOAA Chart: 18520 Latitude: 45° 25.8' N ( 45.43000)
USGS Quad: TILLAMOOK Longitude: 123° 56.7' W (-123.94500)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING:
DESIGNATION: 943 7262 UNSTAMPED 2
ALIAS: NO STAMPING 2
MONUMENTATION: Survey disk VM#: 8858
AGENCY: Oregon State Highway Department IDB PID#:
SETTING CLASSIFICATION: Bronze steel rod OPUS PID:
LATITUDE: 45° 25.8' N ( 45.43000) LONGITUDE: 123° 56.7' W (-123.94500)
The bench mark is a yellow plastic mark located 1 m (3 ft) SW of the center of a
pole supporting the Tillamook Boat Landing sign, and 0.46 m (1.5 ft) SW of the
SW edge of the concrete sign base. The bench mark is crimped to a bronze steel
rod driven 1 m (3 ft) into the ground.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 7 of 8
Station ID: 9437262 PUBLICATION DATE: 07/02/2003
Name: NETARTS, NETARTS BAY
OR
NOAA Chart: 18520 Latitude: 45° 25.8' N ( 45.43000)
USGS Quad: TILLAMOOK Longitude: 123° 56.7' W (-123.94500)
T I D A L D A T U M S
Tidal datums at NETARTS, NETARTS BAY based on:
LENGTH OF SERIES: 3 MONTHS
TIME PERIOD: September 1979 - November 1979
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:
MEAN HIGHER HIGH WATER MHHW = 2.089
MEAN HIGH WATER MHW = 1.856
MEAN SEA LEVEL MSL = 1.110
MEAN TIDE LEVEL MTL = 1.090
MEAN LOW WATER MLW = 0.324
MEAN LOWER LOW WATER MLLW = 0.000
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
943 7262 A 1977 4.861 3.005
943 7262 B 1977 12.407 10.551
943 7262 C 1977 13.247 11.391
943 7262 UNSTAMPED 1 3.288 1.432
943 7262 UNSTAMPED 2 4.812 2.956
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 8 of 8
Station ID: 9437262 PUBLICATION DATE: 07/02/2003
Name: NETARTS, NETARTS BAY
OR
NOAA Chart: 18520 Latitude: 45° 25.8' N ( 45.43000)
USGS Quad: TILLAMOOK Longitude: 123° 56.7' W (-123.94500)
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.