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National Ocean Service
Datums Page Page 1 of 9
Station ID: 9440910 PUBLICATION DATE: 04/21/2003
Name: TOKE POINT, WILLAPA BAY
WA
NOAA Chart: 18504 Latitude: 46° 42.5' N ( 46.70830)
USGS Quad: BAY CENTER Longitude: 123° 57.9' W (-123.96500)
To reach the tidal bench marks from the intersection of State Highway 105 and a
road leading to Greyland/Tokeland, proceed 1.88 km (3.0 mi) SE to the end of a
paved road, then procced 137 m (450 ft) straight to the end of the gravel roadto
the Nelson Crab Company dock. The bench marks are in the vicinity of the Nelson
Crab Company Cannery, the Toke Point Cafe, and the docks. The tide gage is
located on the north side of the Nelson Crab Company Pier, next to ramp leading
to floating docks.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 0910 H 1976
DESIGNATION: 944 0910 H
MONUMENTATION: Tidal Station disk VM#: 1080
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Stainless steel rod OPUS PID:
LATITUDE: 46° 42.4' N ( 46.70653) LONGITUDE: 123° 58.1' W (-123.96875)
The primary bench mark is a disk located 8.84 m (29.0 ft) NE of the centerline
of Front Lane, 3.51 m (11.5 ft) NE of telephone pole P138, 1.52 m (5.0 ft) west
of the SE corner of Port of Willapa restrooms, and 0.61 m (2.0 ft) south of a
NGS metal witness post. The bench mark is set 0.25 m (0.8 ft) below ground,
crimped to the top of a stainless steel rod driven to a depth of 17.1 m (56 ft),
and encased in a 5" PVC pipe with a metal access lid.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 9
Station ID: 9440910 PUBLICATION DATE: 04/21/2003
Name: TOKE POINT, WILLAPA BAY
WA
NOAA Chart: 18504 Latitude: 46° 42.5' N ( 46.70830)
USGS Quad: BAY CENTER 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: 5 1922
DESIGNATION: TIDAL 5
MONUMENTATION: Tidal Station disk VM#: 1081
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: SC0917
SETTING CLASSIFICATION: Concrete monument OPUS PID:
LATITUDE: 46° 42.3' N ( 46.70564) LONGITUDE: 123° 58.2' W (-123.97067)
The bench mark is a disk set in top of a concrete post at the NE corner of an
asphalt parking lot at abandoned Willapa Bay Coast Guard Station and apartment 3
at 3229 Emerson, 29 m (95 ft) NE of the NE corner of the abandoned Coast Guard
garage building, 8.53 m (28.0 ft) south of the centerline of an asphalt road on
the north side of the station, 2.29 m (7.5 ft) south of the north edge of the
parking lot and a fence, 0.15 m (0.5 ft) west of the east edge of the parking
lot, and 0.30 m (1 ft) above ground.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 9
Station ID: 9440910 PUBLICATION DATE: 04/21/2003
Name: TOKE POINT, WILLAPA BAY
WA
NOAA Chart: 18504 Latitude: 46° 42.5' N ( 46.70830)
USGS Quad: BAY CENTER 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: FLAG 1958
DESIGNATION: FLAG
MONUMENTATION: Bench Mark disk VM#: 1083
AGENCY: US Army Corps of Engineers (USE) IDB PID#: SC0916
SETTING CLASSIFICATION: Concrete base OPUS PID#: SC0916
LATITUDE: 46° 42.3' N ( 46.70500) LONGITUDE: 123° 58.3' W (-123.97089)
The bench mark is a disk set flush in the concrete base of flagpole located at
3224 Kindred Avenue, 28.68 m (94.1 ft) east of the centerline of North Street,
13.41 m (44.0 ft) north of centerline of Kindred Avenue (Highway 13A), 5.91 m
(19.4 ft) south of the south face of the center section of the house at 3224
Kindred Street, and 0.76m (2.5 ft) SW of the flagpole.
BENCH MARK STAMPING: 0910 J 1976
DESIGNATION: 944 0910 J
MONUMENTATION: Tidal Station disk VM#: 1084
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Stainless steel rod OPUS PID:
LATITUDE: 46° 42.4' N ( 46.70628) LONGITUDE: 123° 58.2' W (-123.96994)
The bench mark is a disk located 52.43 m (172.0 ft) north of the centerline of
Emerson Avenue, 7.32 m (24.0 ft) west of the centerline of Nelson Lane, and 0.55
m (1.8 ft) NE of C&GS metal witness post. The bench mark is set flush with the
ground, crimped to the top of a stainless steel rod driven to a depth of 19.5 m
(64 ft), and encased in a 5" PVC pipe with a metal access lid.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 9
Station ID: 9440910 PUBLICATION DATE: 04/21/2003
Name: TOKE POINT, WILLAPA BAY
WA
NOAA Chart: 18504 Latitude: 46° 42.5' N ( 46.70830)
USGS Quad: BAY CENTER 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: TIDAL BM 0910 L 1978
DESIGNATION: 944 0910 BM L TIDAL
MONUMENTATION: Tidal Station disk VM#: 1085
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete platform OPUS PID:
LATITUDE: 46° 42.5' N ( 46.70830) LONGITUDE: 123° 57.9' W (-123.96500)
The bench mark is a disk set in a concrete pad located at the north end of
Kindred Avenue, 15.13 m (49.6 ft) NE of power pole # P13, 14.00 m (45.9 ft) SE
of the SE handrail post of the public fishing dock, 12.04 m (39.5 ft) east of a
metal witness sign on fence, 12 m (38 ft) SE of a line of pilings along waters
edge, 11.40 m (37.4 ft) south of a metal witness sign on piling, 4.62 m (15.2
ft) east of the extended centerline of Kindred Avenue, and 0.56 m (1.8 ft) west
of extended east edge of concrete pad.
BENCH MARK STAMPING: BM N 1983
DESIGNATION: 944 0910 N TIDAL
MONUMENTATION: Pipe Cap VM#: 1087
AGENCY: National Geodetic Survey (NGS) IDB PID#:
SETTING CLASSIFICATION: Stainless steel rod OPUS PID:
LATITUDE: 46° 42.3' N ( 46.70558) LONGITUDE: 123° 58.1' W (-123.96800)
The bench mark is a stainless steel pile cap located in front of a residence at
3269 Kindred Avenue, 130 m (425 ft) NE of bench mark BM P 1983, 13.11 m (43.0
ft) SW of telephone pole P13-2, 3.66 m (12.0 ft) west of a NGS orange witness
post, 1.77 m (5.8 ft) east of the centerline of Kindred Avenue, and 2.74 m (9.0
ft) west of the east asphalt edge of Kindred Avenue. The bench mark is set in
the middle of a white painted cross in a steel hand-hole 0.91 m (0.3 ft) below
the road, crimped to the top of a 9/16-inch stainless steel rod driven to a
depth of 15.2 m (50 ft).
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 9
Station ID: 9440910 PUBLICATION DATE: 04/21/2003
Name: TOKE POINT, WILLAPA BAY
WA
NOAA Chart: 18504 Latitude: 46° 42.5' N ( 46.70830)
USGS Quad: BAY CENTER 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: BM P 1983
DESIGNATION: 944 0910 P TIDAL
MONUMENTATION: Pipe Cap VM#: 1088
AGENCY: National Geodetic Survey (NGS) IDB PID#: AI2206
SETTING CLASSIFICATION: Stainless steel rod OPUS PID:
LATITUDE: 46° 42.2' N ( 46.70372) LONGITUDE: 123° 58.2' W (-123.96986)
The bench mark is a stainless steel cap located in front of a residence at 3247
Kindred Avenue, 130 m (425 ft) SW of bench mark BM N 1983, 28.22 m (92.6 ft) NE
of the NE corner of a barn shaped home at 3243 Kindred Avenue, 4.82 m (15.8 ft)
NW of the utility pole # P12-3I, 1.52 m (5.0 ft) SE of the centerline of Kindred
Avenue. The bench mark is set in the middle of a white painted cross in a steel
hand-hole 0.91 m (0.3 ft) below the road, crimped to the top of a 9/16-inch
stainless steel rod driven to a depth of 15.2 m (50 ft).
BENCH MARK STAMPING: 0910 K 1976
DESIGNATION: 944 0910 K
MONUMENTATION: Tidal Station disk VM#: 1089
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Stainless steel rod OPUS PID:
LATITUDE: 46° 42.3' N ( 46.70489) LONGITUDE: 123° 58.5' W (-123.97458)
The bench mark is a disk located in front yard of residence at 3166 Kindred
Avenue, 7.38 m (24.2 ft) north of the centerline of Kindred Avenue, 0.55 m (1.8
ft) west of C&GS metal witness post. The bench mark is set 10 cm (0.3 ft) above
ground, crimped to the top of a stainless steel rod driven to a depth of 17.1 m
(56 ft), and encased in a 5" PVC pipe with a metal access lid.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 9
Station ID: 9440910 PUBLICATION DATE: 04/21/2003
Name: TOKE POINT, WILLAPA BAY
WA
NOAA Chart: 18504 Latitude: 46° 42.5' N ( 46.70830)
USGS Quad: BAY CENTER 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:
DESIGNATION: 944 0910 12 1974
ALIAS: 12 1974 USE
MONUMENTATION: Bench Mark disk VM#: 1090
AGENCY: US Army Corps of Engineers (USE) IDB PID#:
SETTING CLASSIFICATION: Concrete sidewalk OPUS PID:
LATITUDE: 46° 42.4' N ( 46.70708) LONGITUDE: 123° 58.2' W (-123.96978)
The bench mark is a disk set flush in concrete adjacent to the Tokeland Marina
Office, 0.2 km (0.1 mi) north of abandoned Coast Guard Station, 0.2 km (0.1 mi)
west of boat house, 11.28 m (37.0 ft) north of center of a three way road
junction, 7.01 m (23.0 ft) SW of a wooden light pole with two junction boxes at
the base of the pole, and 4.72 m (15.5 ft) SE of the SE corner of the residence
at 3242 Front Street, and 0.61 m (2.0 ft) NW of Jim and Rose Taylor scribed in
concrete.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 7 of 9
Station ID: 9440910 PUBLICATION DATE: 04/21/2003
Name: TOKE POINT, WILLAPA BAY
WA
NOAA Chart: 18504 Latitude: 46° 42.5' N ( 46.70830)
USGS Quad: BAY CENTER 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: BM Q 1983
DESIGNATION: 944 0910 BM Q
MONUMENTATION: Bolt VM#: 1410
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Stainless steel rod OPUS PID:
LATITUDE: 46° 42.3' N ( 46.70481) LONGITUDE: 123° 58.4' W (-123.97269)
The bench mark is the 9/16-inch head of a 3/8-inch stainless steel bolt attached
to a stainless steel rod located 145 m (475 ft) west of bench mark Flag 1958,
143 m (470 ft) east of bench mark 0910 K 1976, 15.33 m (50.3 ft) SW of the
utility pole # P12-57, 3.72 m (12.2 ft) north of the utility pole # P12-53 that
has NGS witness post sign attached, and 1.77 m (5.8 ft) south of the centerline
of Kindred Avenue. The bench mark is set in a steel hand-hole 0.12 m (0.4 ft)
below the road, cemented into the top of a 9/16-inch stainless steel deep rod
mark driven to a depth of 15.2 m (50 ft).
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 8 of 9
Station ID: 9440910 PUBLICATION DATE: 04/21/2003
Name: TOKE POINT, WILLAPA BAY
WA
NOAA Chart: 18504 Latitude: 46° 42.5' N ( 46.70830)
USGS Quad: BAY CENTER Longitude: 123° 57.9' W (-123.96500)
T I D A L D A T U M S
Tidal datums at TOKE POINT, WILLAPA BAY 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 (11/14/1981) = 4.392
MEAN HIGHER HIGH WATER MHHW = 2.719
MEAN HIGH WATER MHW = 2.493
MEAN SEA LEVEL MSL = 1.458
MEAN TIDE LEVEL MTL = 1.455
MEAN LOW WATER MLW = 0.418
North American Vertical Datum NAVD88 = 0.249
MEAN LOWER LOW WATER MLLW = 0.000
LOWEST OBSERVED WATER LEVEL (12/19/1983) = -1.162
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
0910 H 1976 5.291 2.798
5 1922 4.081 1.588
FLAG 1958 4.347 1.854
0910 J 1976 5.154 2.661
TIDAL BM 0910 L 1978 4.680 2.187
BM N 1983 4.362 1.869
BM P 1983 4.028 1.535
0910 K 1976 4.476 1.983
944 0910 12 1974 5.673 3.180
BM Q 1983 4.470 1.977
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 9 of 9
Station ID: 9440910 PUBLICATION DATE: 04/21/2003
Name: TOKE POINT, WILLAPA BAY
WA
NOAA Chart: 18504 Latitude: 46° 42.5' N ( 46.70830)
USGS Quad: BAY CENTER 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.