U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 8
PUBLICATION DATE: 02/10/1988
Station ID: 9440910 SUPERCEDED DATE: 04/21/2003
Name: TOKE POINT, WILLAPA BAY
WASHINGTON
NOAA Chart: 18504 Latitude: 46° 42.5' N
USGS Quad: BAY CENTER Longitude: 123° 57.9' W
To reach the tidal bench marks from State Highway 105 Tokeland exit, proceed SE
on the road to Tokeland for 3.0 miles (4.8 km) to the end of the road, turn left
onto the gravel road and proceed for 300 feet (91 m) to the Nelson Crab, Inc.
Cannery building. The bench marks are in the vicinity of the Cannery, the Toke
Point Cafe, and the Tokeland docks. The tide gage and staff are located on the
north side of the Nelson Crab, Inc. pier.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 0910 H 1976
MONUMENTATION: Survey Disk VM#: 1080
AGENCY: PID:
SETTING CLASSIFICATION: Copper-clad Steel Rod
The bench mark is on the north side of Kindred Avenue, 29 feet (9 m) NE of the
centerline of Kindred Avenue, 11.5 feet (3.5 m) NE of telephone pole #138, 5
feet (2 m) west of the SE corner of the Port of Willapa restrooms, and 2 feet (1
m) south of a metal witness post. The bench mark is 0.3 foot (0.1 m) below
ground, crimped to a copper-clad steel rod driven 56 feet (17 m), and encased in
a 4-inch PVC pipe with concrete kickblock.
BENCH MARK STAMPING: 5 1922
MONUMENTATION: Survey Disk VM#: 1081
AGENCY: PID#: SC0917
SETTING CLASSIFICATION: Concrete Monument
The bench mark is set in a concrete monument in the NE corner of the Willapa Bay
Coast Guard Station asphalt parking lot, 95 feet (29 m) NE of the NE corner of
the Coast Guard garage building, 28 feet (9 m) south of the centerline of
Emerson Avenue, 7.5 feet (2.3 m) south of the north edge of the parking lot, 0.5
foot (0.2 m) west of the east edge of the parking lot, and is 1 foot (0.3 m)
above ground.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 8
PUBLICATION DATE: 02/10/1988
Station ID: 9440910 SUPERCEDED DATE: 04/21/2003
Name: TOKE POINT, WILLAPA BAY
WASHINGTON
NOAA Chart: 18504 Latitude: 46° 42.5' N
USGS Quad: BAY CENTER Longitude: 123° 57.9' W
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 9 1935
MONUMENTATION: Survey Disk VM#: 1082
AGENCY: PID#: SC0914
SETTING CLASSIFICATION: Concrete Slab
The bench mark is set in the NE corner of a concrete porch at the main entrance
to Tokeland Hotel, 250 feet (76 m) NE of the centerline of the main country road
leading to the Tokeland docks, 9.5 feet (2.9 m) north of the center of the hotel
door, 0.5 foot (0.2 m) west of the west face of the hotel, and is set at ground
level.
BENCH MARK STAMPING: FLAG 1958
MONUMENTATION: Survey Disk VM#: 1083
AGENCY: PID#: SC0916
SETTING CLASSIFICATION: Concrete Base
The bench mark is set in the concrete base for the flagpole at Willapa Bay Coast
Guard Station at 3223 Kindred Street, 94.1 feet (28.7 m) east of the centerline
of North Street, 19.4 feet (5.9 m) south of the Coast Guard buildings center
section south face, and 2.5 feet (0.8 m) south of the flagpole.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 8
PUBLICATION DATE: 02/10/1988
Station ID: 9440910 SUPERCEDED DATE: 04/21/2003
Name: TOKE POINT, WILLAPA BAY
WASHINGTON
NOAA Chart: 18504 Latitude: 46° 42.5' N
USGS Quad: BAY CENTER Longitude: 123° 57.9' W
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 0910 J 1976
MONUMENTATION: Survey Disk VM#: 1084
AGENCY: PID:
SETTING CLASSIFICATION: Copper-clad Steel Rod
The bench mark is on the NE corner of the residential yard at 4619 Marina Drive,
172 feet (52 m) north of the centerline of Emerson Avenue, 24 feet (7 m) west of
the centerline of Marina Drive, 11.7 feet (3.6 m) east of the easternmost of two
small pine trees in the yard, 1.8 feet (0.5 m) NE of a metal witness post, and
1.7 feet (0.5 m) NE of the NE corner of the yard fence. The bench mark is at
ground level, crimped to a copper-clad steel rod driven 64 feet (20 m), and
encased in a 4-inch PVC pipe and concrete kickblock.
BENCH MARK STAMPING: TIDAL BM 0910 L 1978
MONUMENTATION: Survey Disk VM#: 1085
AGENCY: PID:
SETTING CLASSIFICATION: Concrete Pad
The bench mark is set in the concrete pad supporting the southernmost of three
Coast Guard diesel fuel tanks, 375 feet (114 m) north of Toke Point Cafe, 46
feet (14 m) NE of the NE corner of the Nelson Crab Pier building, 40 feet (12 m)
south of the wood piles along the waters edge, 3 feet (1 m) west of a 10.5 x
10.5 foot (3.2 x 3.2 m) concrete wall around the tank, and 1 foot (0.3 m) NE of
the tank.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 8
PUBLICATION DATE: 02/10/1988
Station ID: 9440910 SUPERCEDED DATE: 04/21/2003
Name: TOKE POINT, WILLAPA BAY
WASHINGTON
NOAA Chart: 18504 Latitude: 46° 42.5' N
USGS Quad: BAY CENTER Longitude: 123° 57.9' W
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 0910 M 1979
MONUMENTATION: Survey Disk VM#: 1086
AGENCY: PID:
SETTING CLASSIFICATION: Concrete Ramp
The bench mark is set in the concrete loading ramp ledge adjacent to the sales
room of Nelsons Cannery on Kindred Street, 0.2 mile (0.3 km) NW of Bench Mark
0910 K, 91.7 feet (28.0 m) north of the centerline of Kindred Street, 8.0 feet
(2.4 m) west of the west wall of the sales room, 7.0 feet (2.1 m) south of the
loading dock wall, 5.7 feet (1.7 m) SSW from the center of a drain, and 0.3 foot
(0.1 m) above ground level.
BENCH MARK STAMPING: BM N 1983
MONUMENTATION: Stainless Steel Cap VM#: 1087
AGENCY: PID:
SETTING CLASSIFICATION: Stainless Steel Rod
The bench mark is set in a steel hand-hole on the east side of Kindred Avenue,
425 feet (130 m) NE of the Bench Mark BM P 1983, 318 feet (97 m) south of the SE
corner of the Toke Point Cafe, 43 feet (13 m) SW of telephone pole P13, 7.1 feet
(2.2 m) north of an orange witness post, 5.8 feet (1.8 m) east of the centerline
of Kindred Avenue and 3.0 feet (0.9 m) west of the east asphalt edge of Kindred
Avenue. The bench mark is 0.3 foot (0.1 m) below the surface of the road,
crimped to a stainless steel rod driven to a depth of 50 feet (15 m). NOTE: An
aluminum tag stamped BM N 1983 is secured to the stainless steel shaft.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 8
PUBLICATION DATE: 02/10/1988
Station ID: 9440910 SUPERCEDED DATE: 04/21/2003
Name: TOKE POINT, WILLAPA BAY
WASHINGTON
NOAA Chart: 18504 Latitude: 46° 42.5' N
USGS Quad: BAY CENTER Longitude: 123° 57.9' W
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: BM P 1983
MONUMENTATION: Stainless Steel Cap VM#: 1088
AGENCY: PID:
SETTING CLASSIFICATION: Stainless Steel Rod
The bench mark is set in a steel hand-hole on the SE side of Kindred Avenue,
92.6 feet (28.2 m) NE of the NE corner of the barn shaped home at 3243 Kindred
Avenue, 15.8 feet (4.8 m) NW of utility pole P21, 9.1 feet (2.8 m) NW of an
orange witness post, 5.0 feet (1.5 m) SE of the centerline of Kindred Avenue,
and 3.0 feet (0.9 m) NW of the SE asphalt edge of Kindred Avenue. The bench
mark is 0.3 foot (0.1 m) below the surface of the road, crimped to a stainless
steel rod driven to a depth of 50 feet (15 m). NOTE: An aluminum tag stamped
BM P 1983 is secured to the stainless steel shaft.
BENCH MARK STAMPING: 0910 K
MONUMENTATION: Survey Disk VM#: 1089
AGENCY: PID:
SETTING CLASSIFICATION: Copper-clad Steel Rod
The bench mark is on the north side of Kindred Street, 0.2 mile (0.3 km) west of
the Coast Guard station, 152 feet (46 m) east of a Watch for Rolling Rocks sign
facing west, 24.2 feet (7.4 m) north of the centerline of Kindred Street, 3.5
feet (1.1 m) WNW of USCG telephone pole R/1, and 1.8 feet (0.5 m) west of a
metal witness post. The bench mark is 0.3 foot (0.1 m) above ground level,
crimped to a copper-clad steel rod driven 56 feet (17 m), 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 6 of 8
PUBLICATION DATE: 02/10/1988
Station ID: 9440910 SUPERCEDED DATE: 04/21/2003
Name: TOKE POINT, WILLAPA BAY
WASHINGTON
NOAA Chart: 18504 Latitude: 46° 42.5' N
USGS Quad: BAY CENTER Longitude: 123° 57.9' W
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: NO STAMPING 1
MONUMENTATION: Survey Disk VM#: 1090
AGENCY: PID:
SETTING CLASSIFICATION: Concrete Pad
The bench mark is set in the concrete pad adjacent to and between the Tokeland
Marina gas pumps, 600 feet (183 m) NW of Toke Point Cafe, 46 feet (14 m) south
of the metal gas station sign set in concrete, 37 feet (11 m) north of a 3-way
gravel road junction, and 23 feet (7 m) SW of a wooden light pole.
BENCH MARK STAMPING: BM Q 1983
MONUMENTATION: Stainless Steel Bolt VM#: 1410
AGENCY: PID:
SETTING CLASSIFICATION: Stainless Steel Rod
The bench mark is set along the south side of Kindred Avenue, 475 feet (145 m)
west of Bench Mark Flag 1958, 470 feet (143 m) east of Bench Mark 0910 K, 50.3
feet (15.3 m) SW of utility pole P1257, 12.2 feet (3.7 m) north of a witness
sign attached to a utility pole, and 5.8 feet (1.8 m) south of the centerline of
Kindred Avenue. The bench mark is 0.4 foot (0.1 m) below the surface of the
road, cemented into the top of a stainless steel rod driven to a depth of 50
feet (15 m). NOTE: An aluminum tag stamped BM Q 1983 is secured to the
stainless steel shaft.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 7 of 8
PUBLICATION DATE: 02/10/1988
Station ID: 9440910 SUPERCEDED DATE: 04/21/2003
Name: TOKE POINT, WILLAPA BAY
WASHINGTON
NOAA Chart: 18504 Latitude: 46° 42.5' N
USGS Quad: BAY CENTER Longitude: 123° 57.9' W
T I D A L D A T U M S
Tidal datums at TOKE POINT, WILLAPA BAY based on:
LENGTH OF SERIES: 9 YEARS
TIME PERIOD: 1977-1985
TIDAL EPOCH: 1960-1978
CONTROL TIDE STATION: 9439040 ASTORIA, OR
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in FEET:
HIGHEST OBSERVED WATER LEVEL (11/14/1981) = 14.38
MEAN HIGHER HIGH WATER (MHHW) = 8.85
MEAN HIGH WATER (MHW) = 8.11
MEAN TIDE LEVEL (MTL) = 4.72
* NATIONAL GEODETIC VERTICAL DATUM-1929 (NGVD) = 4.41
MEAN LOW WATER (MLW) = 1.33
MEAN LOWER LOW WATER (MLLW) = 0.00
LOWEST OBSERVED WATER LEVEL (12/19/1983) = -3.84
* NGVD reference based on elevations published in Quad 13 WASH, 1972, and NOS
leveling of 1986.
National Geodetic Vertical Datum (NGVD 29)
Bench Mark Elevation Information In FEET above:
Stamping or Designation MLLW MHW
0910 H 1976 17.33 9.22
5 1922 13.35 5.24
9 1935 13.53 5.42
FLAG 1958 14.22 6.11
0910 J 1976 16.90 8.79
TIDAL BM 0910 L 1978 15.34 7.23
0910 M 1979 13.23 5.12
BM N 1983 14.28 6.17
BM P 1983 13.17 5.06
0910 K 14.63 6.52
NO STAMPING 1 18.64 10.53
BM Q 1983 14.62 6.51
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 8 of 8
PUBLICATION DATE: 02/10/1988
Station ID: 9440910 SUPERCEDED DATE: 04/21/2003
Name: TOKE POINT, WILLAPA BAY
WASHINGTON
NOAA Chart: 18504 Latitude: 46° 42.5' N
USGS Quad: BAY CENTER Longitude: 123° 57.9' W
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 (NAVD 88).
NGVD 29 is a fixed datum adopted as a national standard geodetic reference for
heights but is now considered superseded. NGVD 29 is sometimes referred to as
Sea Level Datum of 1929 or as Mean Sea Level on some early issues of Geological
Survey Topographic Quads. NGVD 29 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 NGVD 29 are available from the National
Geodetic Survey (NGS) data base via the World Wide Web at
National Geodetic Survey.
NAVD 88 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. NAVD 88 replaces NGVD 29 as the national
standard geodetic reference for heights. Bench mark elevations relative to
NAVD 88 are available from NGS through the World Wide Web at
National Geodetic Survey.
NGVD 29 and NAVD 88 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 NAVD 88 elevation is shown on the Elevations of Tidal Datums Table Referred
to MLLW only when two or more of the bench marks listed have NAVD 88 elevations.
The NAVD 88 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, NAVD 88 bench mark elevations computed indirectly from the tidal
datums elevation table may differ slightly from NAVD 88 elevations listed for
each bench mark in the NGS database.