U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 5
Station ID: 9437381 PUBLICATION DATE: 02/06/2014
Name: DICK POINT, TILLAMOOK BAY
OR
NOAA Chart: 18558 Latitude: 45° 28.9' N ( 45.48170)
USGS Quad: NETART Longitude: 123° 54.1' W (-123.90200)
To reach the station from the intersection of US Highway 101 and Oregon State
Highway 131 (3rd street) in Tillamook, proceed west for 2.7 km (1.7 mi) to the
intersection with Bay Ocean Road, turn right on Bay Ocean Road and proceed
northwesterly for 3.4 km (2.1 mi) to the property of 3005 Bay Ocean Road. The
station is located on the pier on private property. The bench marks are located
from the property to the east along Bay Ocean Road to the Memaloose Point Boat
Launch 1.35 km (0.73 mi) SE of the station.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 7381 A 2013
DESIGNATION: 943 7381 A
MONUMENTATION: Flange-encased Rod VM#: 20752
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Flange-encased rod OPUS PID#: BBDB44
LATITUDE: 45° 28.3' N ( 45.47169) LONGITUDE: 123° 53.4' W (-123.89058)
The bench mark is a flange-encased rod 49.63 m (162.8 ft) NW of NW concrete
corner of old oyster farm deck, 37.74 m (123.8 ft) NE of bench mark OSMB 2914
02, 26.46 m (86.8 ft) NNE of the NW corner of outhouse, 20.99 m (68.9 ft) ESE of
northern most point of piling on Memaloose Point boat dock, 4.28 m (14.0 ft)
north of southern edge of peninsula rip rap. The datum point is set 9 cm (4
inches) below the ground, being the top of a stainless steel rod driven 20.7 m
(68 ft) to substantial resistance in a sleeve extending to 1.1 m (3.6 ft), and
encased in a 5-inch National Geodetic Survey logo cover.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 5
Station ID: 9437381 PUBLICATION DATE: 02/06/2014
Name: DICK POINT, TILLAMOOK BAY
OR
NOAA Chart: 18558 Latitude: 45° 28.9' N ( 45.48170)
USGS Quad: NETART Longitude: 123° 54.1' W (-123.90200)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: )SMB 2914 02 1997
DESIGNATION: OSMB 2914 02
MONUMENTATION: Bench Mark disk VM#: 20753
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete ramp OPUS PID:
LATITUDE: 45° 28.3' N ( 45.47153) LONGITUDE: 123° 53.5' W (-123.89097)
The bench mark is a disk set in top of the concrete ramp leading to the pier,
37.74 m (123.8 ft) SW of bench mark 943 7381 A, 34.69 m (113.8 ft) north of the
north most piling on pier, 17.32 m (56.8 ft) west of the NW corner of the
outhouse, 10.26 m (33.7 ft) ESE of wooden dolphin signpost and 6.14 m (20.1 ft)
NNE of center of ribbed concrete ramp and 0.58 m (1.9 ft) above the ground.
BENCH MARK STAMPING: 7381 B 2013
DESIGNATION: 943 7381 B
MONUMENTATION: Tidal Station disk VM#: 20754
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete slab OPUS PID:
LATITUDE: 45° 28.3' N ( 45.47086) LONGITUDE: 123° 53.5' W (-123.89103)
The bench mark is a disk set in top of the concrete slab supporting the
Memaloose Point boat launch sign, 63.41 m (208.0 ft) south of bench mark OSMB
2914 02, 28.84 m (94.6 ft) west of utility pole 227502, 15.71 m (51.5 ft) NE of
falling rock sign on the south side of Bay Ocean road, 2.57 m (8.4 ft) NE of SW
concrete pad corner and 0.18 m (0.6 ft) NW of N sign post.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 5
Station ID: 9437381 PUBLICATION DATE: 02/06/2014
Name: DICK POINT, TILLAMOOK BAY
OR
NOAA Chart: 18558 Latitude: 45° 28.9' N ( 45.48170)
USGS Quad: NETART Longitude: 123° 54.1' W (-123.90200)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: Unstamped
DESIGNATION: 943 7381 USACE Unstamped
MONUMENTATION: Bench Mark disk VM#: 20755
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete step OPUS PID:
LATITUDE: 45° 28.4' N ( 45.47311) LONGITUDE: 123° 53.8' W (-123.89608)
The bench mark is a disk set in top of a concrete step leading to the front door
of the residence, 25.11 m (82.4 ft) SSE of utility pole number 225601, 22.51 m
(73.9 ft) SW of the SW corner of outbuilding of address 2275 Bay Ocean Road,
7.94 m (26.0 ft) NE of the center of the front door, and 6.28 m (20.6 ft) SW of
the centerline of Bay Ocean Road.
BENCH MARK STAMPING: 7381 C 2013
DESIGNATION: 943 7381 C
MONUMENTATION: Tidal Station disk VM#: 20756
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete step OPUS PID:
LATITUDE: 45° 28.6' N ( 45.47750) LONGITUDE: 123° 54.1' W (-123.90133)
The bench mark is a disk set atop a concrete step leading down to a small
retention pond, 16.19 m (53.1 ft) NNW of a concrete water cistern on the north
side of Bay Ocean Road, 9.64 m (31.6 ft) NNW of a utility pole numbered 223802,
6.03 m (19.8 ft) NE of Bay Ocean Road, 0.90 m (3.0 ft) west of a large bottom
step of the stairway, and 0.17 m (0.6 ft) SSW of a concrete wall.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 5
Station ID: 9437381 PUBLICATION DATE: 02/06/2014
Name: DICK POINT, TILLAMOOK BAY
OR
NOAA Chart: 18558 Latitude: 45° 28.9' N ( 45.48170)
USGS Quad: NETART Longitude: 123° 54.1' W (-123.90200)
T I D A L D A T U M S
Tidal datums at DICK POINT, TILLAMOOK BAY based on:
LENGTH OF SERIES: 4 MONTHS
TIME PERIOD: June 2013 - September 2013
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 = 2.118
MEAN HIGH WATER MHW = 1.905
MEAN TIDE LEVEL MTL = 1.061
MEAN SEA LEVEL MSL = 1.008
MEAN LOW WATER MLW = 0.217
MEAN LOWER LOW WATER MLLW = 0.000
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
7381 A 2013 3.703 1.798
)SMB 2914 02 1997 3.402 1.497
7381 B 2013 3.649 1.744
Unstamped 6.957 5.052
7381 C 2013 3.660 1.755
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 5
Station ID: 9437381 PUBLICATION DATE: 02/06/2014
Name: DICK POINT, TILLAMOOK BAY
OR
NOAA Chart: 18558 Latitude: 45° 28.9' N ( 45.48170)
USGS Quad: NETART Longitude: 123° 54.1' W (-123.90200)
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.