U.S. DEPARTMENT OF COMMERCE
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National Ocean Service
Datums Page Page 1 of 9
Station ID: 9443090 PUBLICATION DATE: 09/30/2011
Name: NEAH BAY, STRAIT OF JUAN DE FUCA
WA
NOAA Chart: 18484 Latitude: 48° 22.0' N ( 48.36667)
USGS Quad: NEAH BAY Longitude: 124° 36.7' W (-124.61167)
To reach the tidal bench marks, from Seattle, Interstate 5 north to hwy 104,
Edmonds Ferry, take ferry from Edmonds to Kingston, continue north on 104 to
junction with 101 north to Port Angeles. Follow 101 west to Route 112 (Neah
Bay). Drive approximately 66 miles to Neah Bay. Follow 112 through Neah Bay
approximately 1.2 miles to the Makah Tribal Pier (approximately the middle of
the bay). The gauge is located on the first floor, under stairs southwest
corner of the company office building in the entrance to the locker/bathrooms,
to the right of the door, inside an expanded metal cage.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: NO 19 1962
DESIGNATION: 944 3090 TIDAL 19
MONUMENTATION: Bench Mark disk VM#: 1091
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: TS0161
SETTING CLASSIFICATION: Concrete foundation OPUS PID#: TS0161
LATITUDE: 48° 22.0' N ( 48.36664) LONGITUDE: 124° 37.1' W (-124.61911)
The primary bench mark is a disk set in the NW corner of an old concrete
foundation which is in the NW side of the intersection of the main street and
the road leading to the High Tide Seafood Company Dock. It is 21.58 m (70.8 ft)
north of a fire hydrant on the south side of the road,12.95 m (42.5 ft) N of
centerline of road, 12.80 m (42.0 ft) west of the centerline extension of the
pier, 6.92 m (22.7ft) NE of a power pole # 3315-108106 which is west of
centerline extension of pier and on the north side of the road, and 0.22 m (0.75
ft) NE of a standard NGS orange fiberglass witness post. Note: both slab and
disk are covered 0.18 m (0.6 ft) with fill.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 9
Station ID: 9443090 PUBLICATION DATE: 09/30/2011
Name: NEAH BAY, STRAIT OF JUAN DE FUCA
WA
NOAA Chart: 18484 Latitude: 48° 22.0' N ( 48.36667)
USGS Quad: NEAH BAY Longitude: 124° 36.7' W (-124.61167)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: NO 18 1959
DESIGNATION: 944 3090 TIDAL 18
MONUMENTATION: Tidal Station disk VM#: 1099
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: TS0156
SETTING CLASSIFICATION: Concrete walkway OPUS PID:
LATITUDE: 48° 22.0' N ( 48.36603) LONGITUDE: 124° 37.0' W (-124.61739)
The bench mark is set in concrete walk adjacent to the foundation of the old
Washburn's store location located across the street from the Makah Mini-Mart,
25.0 m (82.0 ft) east of a red fire hydrant, 14.63 m (48.0 ft) west of a 0.91 m
(3 ft) high green box marked "Buried Cable", 8.84 m (29.0 ft) south from center
of Neah Bay-Clallam Bay Highway, 6.40 m (21.0 ft) east of a telephone pole with
a stop sign and white witness post marker, and 0.75 m (2.5 ft) south of north
edge of sidewalk.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 9
Station ID: 9443090 PUBLICATION DATE: 09/30/2011
Name: NEAH BAY, STRAIT OF JUAN DE FUCA
WA
NOAA Chart: 18484 Latitude: 48° 22.0' N ( 48.36667)
USGS Quad: NEAH BAY Longitude: 124° 36.7' W (-124.61167)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: NEAH WEST 2 1970
DESIGNATION: NEAH WEST 2
ALIAS: BM 23 1970
MONUMENTATION: Triangulation Station disk VM#: 1102
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: TS0171
SETTING CLASSIFICATION: Concrete monument OPUS PID:
LATITUDE: 48° 22.1' N ( 48.36825) LONGITUDE: 124° 37.5' W (-124.62428)
The bench mark is a disk located on the northeast corner of property lot 270
Bayview Avenue where lot line meets property of 290 Bayview Avenue, 7.92 m (26.0
ft) south of centerline of road, 7.19 m (23.6 ft) NNE of the NE corner of
plywood house, 0.85 m (2.8 ft) west of NW corner of rock retaining wall, and 15
cm (6 in) south of a 1.22 m (4 ft) chain link fence marked with a witness post.
The bench mark is a disk set in a 10-inch diameter concrete monument flush with
grass surface. Note: 2005 placed witness sign on chain link fence in front of
mark.
BENCH MARK STAMPING: NO 25 1973
DESIGNATION: 944 3090 TIDAL 25
MONUMENTATION: Bench Mark disk VM#: 1104
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: TS0154
SETTING CLASSIFICATION: Concrete curb OPUS PID:
LATITUDE: 48° 22.0' N ( 48.36586) LONGITUDE: 124° 36.7' W (-124.61189)
The bench mark is set flush in the south concrete curb at the east end of the
driveway to the Tyee Motel and Trailer Park located 12.40 m (40.7 ft) ENE of the
NE corner of Tyee Motel, 5.79 m (19 ft) south of the centerline of the road, and
2.56 m (8.4 ft) north of the west end of cable barrier; the west end of barrier
is a half buried hot water heater.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 9
Station ID: 9443090 PUBLICATION DATE: 09/30/2011
Name: NEAH BAY, STRAIT OF JUAN DE FUCA
WA
NOAA Chart: 18484 Latitude: 48° 22.0' N ( 48.36667)
USGS Quad: NEAH BAY Longitude: 124° 36.7' W (-124.61167)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: TIDAL BM 29 1975
DESIGNATION: 944 3090 TIDAL BM 29
MONUMENTATION: Tidal Station disk VM#: 1108
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete slab OPUS PID:
LATITUDE: 48° 22.0' N ( 48.36597) LONGITUDE: 124° 36.8' W (-124.61336)
The bench mark is a disk set in the SE corner of the concrete base of the former
Union Oil Tank, 51.21 m (168.0 ft) east of the extended portion of an
unidentified pier immediately east of the Northwest Seafood Company pier, 29.26
m (96.0 ft) NW of the yellow fire hydrant on south side of the road, 11.73 m
(38.5 ft) north of the centerline of Front Street, 6.10 m (20.0 ft) NW of a
telephone pole #3315, and 0.15 m (0.5 ft) north of the southern edge of the
concrete base.
BENCH MARK STAMPING: 3090 A 1982
DESIGNATION: 944 3090 A TIDAL
MONUMENTATION: Tidal Station disk VM#: 1109
AGENCY: National Ocean Survey (NOS) IDB PID#: TS0340
SETTING CLASSIFICATION: Galvanized steel rod OPUS PID:
LATITUDE: 48° 22.0' N ( 48.36689) LONGITUDE: 124° 37.3' W (-124.62106)
The bench mark is a disk located 169 m (554 ft) WNW of bench mark 944 3090 TIDAL
19, 4.57 m (15.0 ft) north of the centerline of main street (Route 112), 1.83 m
(6.0 ft) west of a 0.91m (3 ft) metal cyclone fence surrounding an Indian burial
area, 0.76 m (2.5 ft) west of a telephone pole marked with a white witness post
sign, and 0.91 m (3.0 ft) south of an orange NOS witness post. The bench mark is
crimped onto the top of a one-half inch galvanized rod driven 17.06 m (56.0 ft)
to substantial resistance, protected by a 4-inch PVC pipe flush with the natural
grade and covered by a threaded PVC pipe plug.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 9
Station ID: 9443090 PUBLICATION DATE: 09/30/2011
Name: NEAH BAY, STRAIT OF JUAN DE FUCA
WA
NOAA Chart: 18484 Latitude: 48° 22.0' N ( 48.36667)
USGS Quad: NEAH BAY Longitude: 124° 36.7' W (-124.61167)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 3090 B 1982
DESIGNATION: 944 3090 B TIDAL
MONUMENTATION: Tidal Station disk VM#: 1110
AGENCY: National Ocean Survey (NOS) IDB PID#: AF8872
SETTING CLASSIFICATION: Copper-clad steel rod OPUS PID:
LATITUDE: 48° 22.1' N ( 48.36836) LONGITUDE: 124° 37.4' W (-124.62411)
The bench mark is located 47.55 m (156.0 ft) west of the west corner cedar log
support at the entrance of the Neah Bay Senior Citizen's Center, 9.24 m (30.3
ft) NE of the centerline of the main street, 5.18 m (17.0 ft) NNW of a red fire
hydrant (now marked by 14" diameter water main), 0.46 m (1.5 ft) NNW of
telephone pole #3315-106-210 with metal witness sign attached. The bench mark is
crimped to the top of a copper-clad steel rod driven to a depth of 19.5 m (64
ft), and encased in a 4-inch PVC pipe flush with the natural grade and covered
by a threaded PVC pipe plug.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 9
Station ID: 9443090 PUBLICATION DATE: 09/30/2011
Name: NEAH BAY, STRAIT OF JUAN DE FUCA
WA
NOAA Chart: 18484 Latitude: 48° 22.0' N ( 48.36667)
USGS Quad: NEAH BAY Longitude: 124° 36.7' W (-124.61167)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 3090 C 1982
DESIGNATION: 944 3090 C TIDAL
MONUMENTATION: Tidal Station disk VM#: 1111
AGENCY: National Ocean Survey (NOS) IDB PID#: AF8873
SETTING CLASSIFICATION: Galvanized steel rod OPUS PID:
LATITUDE: 48° 22.1' N ( 48.36789) LONGITUDE: 124° 37.6' W (-124.62681)
The bench mark is a disk located 46.02 m (151 ft) north of the north corner of
the Neah Bay Presbyterian Church, 7.62 m (25 ft) NW of the centerline of the
road which runs in front the Health Center, 0.46 m (1.5 ft) NE of the curb for
the handicapped parking spot and 0.70 m (2.3 ft) WSW of telephone pole # 3315
105207 105161 with a witness post sign screwed to it. The mark is a disk crimped
onto the top of a one-half inch galvanized steel rod driven to a depth of 17.07
m (56.0 ft). The mark is protected by a 4-inch PVC pipe prjecting 10.16 cm (4
in). abve the natural grade and covered by a threaded PVC pipe plug.
BENCH MARK STAMPING: R
DESIGNATION: 944 3090 AQUAREF
MONUMENTATION: Bolt VM#: 12911
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete deck OPUS PID:
LATITUDE: ' °deg (0) LONGITUDE: ' °deg (0)
The bench mark is located 1.85 m (6 ft) W of the SSW corner of the office
building, 1.60 m (5.2 ft) W of the aquatrak well, .90 m (3 ft) SW of the SW
support for the stairs for the office. The bench mark is a stainless steel bolt
stamped R located on the concrete wharf deck of the Olympic Fish Company pier
adjacent to the aquatrak well.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 7 of 9
Station ID: 9443090 PUBLICATION DATE: 09/30/2011
Name: NEAH BAY, STRAIT OF JUAN DE FUCA
WA
NOAA Chart: 18484 Latitude: 48° 22.0' N ( 48.36667)
USGS Quad: NEAH BAY Longitude: 124° 36.7' W (-124.61167)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 3090 D 2004
DESIGNATION: 944 3090 D
MONUMENTATION: Tidal Station disk VM#: 17720
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete monument OPUS PID:
LATITUDE: 48° 22.0' N ( 48.36717) LONGITUDE: 124° 36.8' W (-124.61403)
The bench mark is set in concrete located on the SW side of the pier in the
corner where pier makes a bend to the NW, 16.15 m (53.0 ft) South of south side
of cannery building, 11.43 m (37.5 ft) SW of the SW corner of the laundry room,
and .1 m (.33 ft) NE from the face of the pier.
BENCH MARK STAMPING: 3090 E 2004
DESIGNATION: 944 3090 E
MONUMENTATION: Tidal Station disk VM#: 17721
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: foundation wall OPUS PID:
LATITUDE: 48° 22.0' N ( 48.36642) LONGITUDE: 124° 36.7' W (-124.61092)
The bench mark is set in a concrete wall which supports a roof over an open
area of concrete, 15.8 m (51.0 ft) north of the grassy area which surrounds 2
flagpoles, 0.78 m (2.5 ft) south of the NW corner of wall, and 0.47 m (1.5 ft)
above the sidewalk.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 8 of 9
Station ID: 9443090 PUBLICATION DATE: 09/30/2011
Name: NEAH BAY, STRAIT OF JUAN DE FUCA
WA
NOAA Chart: 18484 Latitude: 48° 22.0' N ( 48.36667)
USGS Quad: NEAH BAY Longitude: 124° 36.7' W (-124.61167)
T I D A L D A T U M S
Tidal datums at NEAH BAY, STRAIT OF JUAN DE FUCA based on:
LENGTH OF SERIES: 19 YEARS
TIME PERIOD: January 1983 - December 2001
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION:
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
HIGHEST OBSERVED WATER LEVEL (11/30/1951) = 3.749
MEAN HIGHER HIGH WATER MHHW = 2.425
MEAN HIGH WATER MHW = 2.167
MEAN TIDE LEVEL MTL = 1.327
MEAN SEA LEVEL MSL = 1.315
MEAN LOW WATER MLW = 0.486
North American Vertical Datum NAVD88 = 0.256
MEAN LOWER LOW WATER MLLW = 0.000
LOWEST OBSERVED WATER LEVEL (11/26/2007) = -1.202
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
NO 19 1962 5.897 3.729
NO 18 1959 6.645 4.478
NEAH WEST 2 1970 6.362 4.195
NO 25 1973 6.356 4.189
TIDAL BM 29 1975 6.117 3.949
3090 A 1982 5.931 3.764
3090 B 1982 5.296 3.129
3090 C 1982 7.334 5.167
R 4.497 2.330
3090 D 2004 4.528 2.361
3090 E 2004 7.069 4.902
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 9 of 9
Station ID: 9443090 PUBLICATION DATE: 09/30/2011
Name: NEAH BAY, STRAIT OF JUAN DE FUCA
WA
NOAA Chart: 18484 Latitude: 48° 22.0' N ( 48.36667)
USGS Quad: NEAH BAY Longitude: 124° 36.7' W (-124.61167)
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.