U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 10
Station ID: 9435827 PUBLICATION DATE: 04/21/2003
Name: DEPOE BAY
OR
NOAA Chart: 18561 Latitude: 44° 48.6' N ( 44.81000)
USGS Quad: NEWPORT NORTH Longitude: 124° 3.5' W (-124.05800)
To reach the tidal bench marks from U.S. Highway 101 (Oregon Coast Highway)
proceed east on SE Bay Street for 0.5 km (0.3 mi), turn west onto SE Coast Guard
Drive and proceed into the harbor parking lot, turn south and go to the third
pier from the north. The bench marks were located near the U.S. Highway 101
bridge over the entrance to Depoe Bay and near the seawall east of Depoe Bay.
The tide gage and staff were located at the foot of Pier 4.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: NO 6 1973
DESIGNATION: 943 5827 TIDAL 6
MONUMENTATION: Tidal Station disk VM#: 8846
AGENCY: National Ocean Survey (NOS) IDB PID#: QE1420
SETTING CLASSIFICATION: Concrete sidewalk OPUS PID:
LATITUDE: 44° 48.6' N ( 44.81000) LONGITUDE: 124° 3.5' W (-124.05800)
The primary bench mark is a disk set flush in the NW corner of a 1.37 m x 1.83 m
(4.5 ft x 6.0 ft) concrete slab (former support for a fuel tank) on the east
side of the harbor, 13 m (43 ft) south of the centerline of a Macadam Road,
11.13 m (36.5 ft) SW of a 9 m (30 ft) high fire tree, and 5.18 m (17.0 ft) north
of the NE corner of the U.S. Coast Guard station.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 10
Station ID: 9435827 PUBLICATION DATE: 04/21/2003
Name: DEPOE BAY
OR
NOAA Chart: 18561 Latitude: 44° 48.6' N ( 44.81000)
USGS Quad: NEWPORT NORTH Longitude: 124° 3.5' W (-124.05800)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: Q 198 1940
DESIGNATION: 943 5827 Q198
MONUMENTATION: Tidal Station disk VM#: 8840
AGENCY: Oregon State Highway Dept. IDB PID#: QE1164
SETTING CLASSIFICATION: Concrete sidewalk OPUS PID:
LATITUDE: 44° 48.6' N ( 44.81000) LONGITUDE: 124° 3.7' W (-124.06200)
The bench mark is a disk set in the sidewalk at the extreme NW corner of the
U.S. Highway 101 bridge, 4.82 m (15.8 ft) north of the subway entrance, 4.21 m
(13.8 ft) west of bench mark REEF 1952, 0.27 m (0.9 ft) east of a concrete rail
with a Depoe Bay Bridge nameplate, and just below the nameplate.
BENCH MARK STAMPING: T126 1941
DESIGNATION: 943 5827 T126
MONUMENTATION: Tidal Station disk VM#: 8841
AGENCY: Oregon State Highway Dept. IDB PID#: QE1165
SETTING CLASSIFICATION: Monument foundation OPUS PID:
LATITUDE: 44° 48.5' N ( 44.80830) LONGITUDE: 124° 3.5' W (-124.05800)
The bench mark is a disk set in the SW corner of the concrete base of Fishermans
Memorial, west of a parapet wall, 248 m (815 ft) north of the north end of the
bridge, and 27 m (90 ft) west of the highway.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 10
Station ID: 9435827 PUBLICATION DATE: 04/21/2003
Name: DEPOE BAY
OR
NOAA Chart: 18561 Latitude: 44° 48.6' N ( 44.81000)
USGS Quad: NEWPORT NORTH Longitude: 124° 3.5' W (-124.05800)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: NO 1 1952
DESIGNATION: 943 5827 TIDAL 1
MONUMENTATION: Tidal Station disk VM#: 8842
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: QE1426
SETTING CLASSIFICATION: Rock outcrop OPUS PID:
LATITUDE: ' °deg (0) LONGITUDE: ' °deg (0)
The bench mark is a disk set flush in a rock outcrop on the south shore of the
entrance to Depoe Bay, 11 m (36 ft) NW of the NW corner of Columbia River
Packers Associated Cannery wharf building, 10 m (32 ft) NE of the SE arch-pier
of the bridge, and 8 m (25 ft) below the cannery wharf floor.
BENCH MARK STAMPING: NO 2 1952
DESIGNATION: 943 5827 TIDAL 2
MONUMENTATION: Tidal Station disk VM#: 8843
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#:
SETTING CLASSIFICATION: Retaining wall OPUS PID:
LATITUDE: ' °deg (0) LONGITUDE: ' °deg (0)
The bench mark is a disk set flush in the top of a retaining wall extending
eastward from the NE corner of the arch-pier of the bridge, 8 m (25 ft) west of
the U.S. Army Corps of Engineers traverse monument number 1, and 1 m (3 ft) east
of the NE corner of the highway bridge arch-pier.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 10
Station ID: 9435827 PUBLICATION DATE: 04/21/2003
Name: DEPOE BAY
OR
NOAA Chart: 18561 Latitude: 44° 48.6' N ( 44.81000)
USGS Quad: NEWPORT NORTH Longitude: 124° 3.5' W (-124.05800)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: REEF 1952
DESIGNATION: 943 5827 REEF
MONUMENTATION: Aluminum marker VM#: 8844
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: QE1418
SETTING CLASSIFICATION: Sidewalk OPUS PID:
LATITUDE: 44° 48.6' N ( 44.81000) LONGITUDE: 124° 3.7' W (-124.06200)
The bench mark is a disk set flush into the surface of the bridge sidewalk at
the NW end of the bridge, 4.21 m (13.8 ft) east of the bench mark Q 198 1940,
4.26 m (14 ft) west of the NW end of the concrete guadrail, and 0.76 m (2.5 ft)
north of the edge of the first step of the subway.
BENCH MARK STAMPING: REEF NO 1 1952
DESIGNATION: 943 5827 REEF RM 1
MONUMENTATION: Reference Mark disk VM#: 8845
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: QE1419
SETTING CLASSIFICATION: Sidewalk OPUS PID:
LATITUDE: 44° 48.6' N ( 44.81000) LONGITUDE: 124° 3.7' W (-124.06200)
The bench mark is a disk set flush in the surface of the sidewalk leading to a
pedestrian subway at the NE end of the bridge, 0.76 m (2.5 ft) west of the east
edge of the concrete guardrail, and 0.76 m (2.5 ft) north of the edge of the
first step of the subway.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 10
Station ID: 9435827 PUBLICATION DATE: 04/21/2003
Name: DEPOE BAY
OR
NOAA Chart: 18561 Latitude: 44° 48.6' N ( 44.81000)
USGS Quad: NEWPORT NORTH Longitude: 124° 3.5' W (-124.05800)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: NO 9 1973
DESIGNATION: 943 5827 TIDAL 9
MONUMENTATION: Tidal Station disk VM#: 8847
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#:
SETTING CLASSIFICATION: Concrete sea wall OPUS PID:
LATITUDE: ' °deg (0) LONGITUDE: ' °deg (0)
The bench mark is a disk set flush in the top of a concrete seawall on the east
side of the harbor, 73 m (241 ft) NW of bench mark 5827 C 1981, 2 m (6 ft) north
of the ramp leading to float number 4, 2 m (5 ft) SW of utility pole #B08B40,
0.21 m (0.7 ft) east of the west edge of the seawall, and 0.15 m (0.5 ft) below
the top of the sidewalk in a covered PVC pipe.
BENCH MARK STAMPING: 5827 A 1981
DESIGNATION: 943 5827 A TIDAL
MONUMENTATION: Tidal Station disk VM#: 8848
AGENCY: National Ocean Service (NOS) IDB PID#: QE1425
SETTING CLASSIFICATION: Dam OPUS PID:
LATITUDE: 44° 48.4' N ( 44.80670) LONGITUDE: 124° 3.5' W (-124.05800)
The bench mark is a disk set in the top of a dam/fish ladder combination located
at the SE corner of Depoe Bay Harbor, 46 m (152 ft) SE of bench mark 5827 B
1981, 9 m (31 ft) NE of the SE corner of the fish ladder, 5.70 m (18.7 ft) west
of the shoreline, and 5 m (16 ft) SE of the NE edge of the dam/fish ladder
combination.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 10
Station ID: 9435827 PUBLICATION DATE: 04/21/2003
Name: DEPOE BAY
OR
NOAA Chart: 18561 Latitude: 44° 48.6' N ( 44.81000)
USGS Quad: NEWPORT NORTH Longitude: 124° 3.5' W (-124.05800)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 5827 B 1981
DESIGNATION: 943 5827 B TIDAL
MONUMENTATION: Tidal Station disk VM#: 8849
AGENCY: National Ocean Service (NOS) IDB PID#: QE1424
SETTING CLASSIFICATION: Galvanized steel rod OPUS PID:
LATITUDE: 44° 48.5' N ( 44.80830) LONGITUDE: 124° 3.5' W (-124.05800)
The bench mark is a disk set on the east side of the gravel road leading to the
dam/fish ladder combination at the SE corner of Depoe Bay Harbor, 46 m (152 ft)
NW of bench mark 5827 A 1981, 38 m (124 ft) south of bench mark 5827 C 1981, 31
m (101 ft) SE of the southernmost corner of the seawall on the east side of the
harbor, 30 m (65 ft) SE of utility pole #B08B12, 10 m (33 ft) NE of the harbor
shoreline, and 0.76 m (2.5 ft) SW of a witness post. The bench mark is set 6 cm
(0.2 ft) below ground level, crimped to the top of a galvanized steel rod driven
7.0 m (23 ft), and encased in a PVC pipe and concrete kickblock.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 7 of 10
Station ID: 9435827 PUBLICATION DATE: 04/21/2003
Name: DEPOE BAY
OR
NOAA Chart: 18561 Latitude: 44° 48.6' N ( 44.81000)
USGS Quad: NEWPORT NORTH Longitude: 124° 3.5' W (-124.05800)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 5827 C 1981
DESIGNATION: 943 5827 C TIDAL
MONUMENTATION: Tidal Station disk VM#: 8850
AGENCY: National Ocean Service (NOS) IDB PID#: QE1423
SETTING CLASSIFICATION: Galvanized steel rod OPUS PID:
LATITUDE: 44° 48.5' N ( 44.80830) LONGITUDE: 124° 3.5' W (-124.05800)
The bench mark is a disk set on east side of the parking lot at Depoe Bay
Harbor, 73 m (241 ft) SE of bench mark NO 9 1973, 38 m (124 ft) north of bench
mark 5827 B 1981, 18 m (60 ft) NE of the southern-most point of the seawall, 16
m (53 ft) north of utility pole #B08B12, 1.77 m (5.8 ft) east of the eastern
edge of the harbor parking lot, and 0.88 m (2.9 ft) west of a witness post. The
bench mark is set 9 cm (0.3 ft) below ground level, crimped to the top of a
galvanized steel rod driven 8.5 m (28 ft), and encased in a PVC pipe and
concrete kickblock.
BENCH MARK STAMPING: PORT MON NO 5
DESIGNATION: 943 5827 PORT MON 5
MONUMENTATION: Tidal Station disk VM#: 8851
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: QE1422
SETTING CLASSIFICATION: Sea wall OPUS PID:
LATITUDE: 44° 48.6' N ( 44.81000) LONGITUDE: 124° 3.6' W (-124.06000)
The bench mark is a disk set flush in the northern corner of the eastern seawall
of Depoe Bay, 19 m (62 ft) NW of a manhole cover at the curve of Coast Guard
Avenue where it curves around the NW corner of the U.S. Coast Guard station, 11
m (37 ft) north of utility pole #B08B-8, and 0.15 m (0.5 ft) SE of a guardrail
post in the north corner of the eastern seawall of the bay.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 8 of 10
Station ID: 9435827 PUBLICATION DATE: 04/21/2003
Name: DEPOE BAY
OR
NOAA Chart: 18561 Latitude: 44° 48.6' N ( 44.81000)
USGS Quad: NEWPORT NORTH Longitude: 124° 3.5' W (-124.05800)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: C13TH COAST GUARD
DESIGNATION: 943 5827 C 13TH
ALIAS: 8 1974
MONUMENTATION: Tidal Station disk VM#: 8852
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: QE1421
SETTING CLASSIFICATION: Concrete monument OPUS PID:
LATITUDE: 44° 48.6' N ( 44.81000) LONGITUDE: 124° 3.7' W (-124.06200)
The bench mark is a disk set in the top of a 0.15 m (0.5 ft) diameter concrete
column, 19 m (63.5 ft) SW of the flagpole in front of the U.S. Coast Guard
station, 18 m (59 ft) east of the west edge of the seawall, 0.30 m (1.0 ft)
south of the SW corner of the fence surrounding the station, and at ground
level. (Note: This mark was formerly designated as BM 8 1974.)
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 9 of 10
Station ID: 9435827 PUBLICATION DATE: 04/21/2003
Name: DEPOE BAY
OR
NOAA Chart: 18561 Latitude: 44° 48.6' N ( 44.81000)
USGS Quad: NEWPORT NORTH Longitude: 124° 3.5' W (-124.05800)
T I D A L D A T U M S
Tidal datums at DEPOE BAY based on:
LENGTH OF SERIES: 10 Years
TIME PERIOD: January 1974 - December 1983
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION: 9435380 SOUTH BEACH, YAQUINA RIVER
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
HIGHEST OBSERVED WATER LEVEL (01/26/1983) = 3.725
MEAN HIGHER HIGH WATER MHHW = 2.511
MEAN HIGH WATER MHW = 2.295
MEAN TIDE LEVEL MTL = 1.356
MEAN SEA LEVEL MSL = 1.346
MEAN LOW WATER MLW = 0.418
North American Vertical Datum NAVD88 = 0.193
MEAN LOWER LOW WATER MLLW = 0.000
LOWEST OBSERVED WATER LEVEL (05/24/1982) = -1.015
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
NO 6 1973 4.883 2.588
Q 198 1940 18.993 16.698
T126 1941 17.737 15.442
NO 1 1952 4.461 2.166
NO 2 1952 5.158 2.863
REEF 1952 18.952 16.657
REEF NO 1 1952 19.013 16.718
NO 9 1973 3.891 1.596
5827 A 1981 3.961 1.666
5827 B 1981 4.054 1.759
5827 C 1981 4.232 1.937
PORT MON NO 5 3.945 1.650
C13TH COAST GUARD 4.546 2.251
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 10 of 10
Station ID: 9435827 PUBLICATION DATE: 04/21/2003
Name: DEPOE BAY
OR
NOAA Chart: 18561 Latitude: 44° 48.6' N ( 44.81000)
USGS Quad: NEWPORT NORTH Longitude: 124° 3.5' W (-124.05800)
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.