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National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 7
Station ID: 9447717 PUBLICATION DATE: 12/11/2014
Name: PRIEST POINT
WA
NOAA Chart: 18443 Latitude: 48° 2.1' N ( 48.03494)
USGS Quad: MARYSVILLE Longitude: 122° 13.6' W (-122.22719)
From the intersection of Interstate 5 and Interstate 90 in Seattle, WA, take
Interstate 5 north to exit 199 for Marysville. Turn left on Tulalip Road /
Marine Drive and continue for 2.7 miles to a left turn on Meridian Ave N.
Continue 0.4 mi to a slight left on Priest Point Drive NE and follow another 0.6
mi to the end of the road. The tide station is located on the southern of two
small piers extending from an otherwise undeveloped lot.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 7915 A 2014
DESIGNATION: 944 7717 A
MONUMENTATION: Metal Rod VM#: 21195
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Stainless steel rod OPUS PID:
LATITUDE: 48° 2.1' N ( 48.03514) LONGITUDE: 122° 13.7' W (-122.22797)
The primary bench mark is a flange-encased rod located 40.90 m (134.2 ft) east
of power pole 16, 5.70 m (18.7 ft) south of the NW corner of the pier, 4.40 m
(14.4 ft) SSW of a wooden bulkhead, 0.30 m (1.0 ft) west of an orange fiberglass
witness post. The datum point is set at an unknown depth below the ground,
being the top of a stainless steel rod driven 28.7 m (94 ft) to refusal, and
encased in a 5-inch NGS logo cap.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 7
Station ID: 9447717 PUBLICATION DATE: 12/11/2014
Name: PRIEST POINT
WA
NOAA Chart: 18443 Latitude: 48° 2.1' N ( 48.03494)
USGS Quad: MARYSVILLE Longitude: 122° 13.6' W (-122.22719)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 7915 B 2014
DESIGNATION: 944 7717 B
MONUMENTATION: Metal Rod VM#: 21196
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Stainless steel rod OPUS PID:
LATITUDE: 48° 2.1' N ( 48.03453) LONGITUDE: 122° 13.7' W (-122.22797)
The bench mark is a flange-encased rod located 34.20 m (112.2 ft) south of the
SW corner of the South pier, 7.65 m (25.1 ft) north of a fire hydrant, 5.50 m
(18.0 ft) west of a fence. The datum point is set at an unknown depth below the
ground, being the top of a stainless steel rod driven 34.7 m (114 ft) to
refusal, and encased in a 5-inch NGS logo cap.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 7
Station ID: 9447717 PUBLICATION DATE: 12/11/2014
Name: PRIEST POINT
WA
NOAA Chart: 18443 Latitude: 48° 2.1' N ( 48.03494)
USGS Quad: MARYSVILLE Longitude: 122° 13.6' W (-122.22719)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 2013 PP1
DESIGNATION: PP1
MONUMENTATION: Metal Rod VM#: 21197
AGENCY: Washington State DOT IDB PID#: DP1167
SETTING CLASSIFICATION: Aluminum alloy rod OPUS PID:
LATITUDE: 48° 1.9' N ( 48.03089) LONGITUDE: 122° 13.9' W (-122.23169)
The bench mark is a disk located 2.80 m (9.2 ft) SW from a 12' diameter plastic
culvert pipe, 11.40 m (37.4 ft) SW from a power pole, 4.4 m (14.4 ft) NW from
the approximate centerline of Priest Point Drive NE and 1.95 m (6.4 ft) NE from
a power pole and witness post. The bench mark is set 16 cm (0.5 ft) below the
ground, crimped to an aluminum rod driven 10.4 m (34.1 ft), and encased in a
WDOT monument case.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 7
Station ID: 9447717 PUBLICATION DATE: 12/11/2014
Name: PRIEST POINT
WA
NOAA Chart: 18443 Latitude: 48° 2.1' N ( 48.03494)
USGS Quad: MARYSVILLE Longitude: 122° 13.6' W (-122.22719)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 2013 PP2
DESIGNATION: PP2
MONUMENTATION: Metal Rod VM#: 21198
AGENCY: Washington State DOT IDB PID#: DP1168
SETTING CLASSIFICATION: Aluminum alloy rod OPUS PID:
LATITUDE: 48° 1.9' N ( 48.03150) LONGITUDE: 122° 14.0' W (-122.23347)
The bench mark is a disk located 6.80 m (22.3 ft) SW from the approximate
centerline of Meridian Avenue North, 3.10 m (10.2 ft) NW from a witness post and
a Dead End sign post, 8.90 m (29.2 ft) NW from power pole number TSA1, 2.60 m
(8.5 ft) SE from a Stop sign and a witness post and 7.50 m (24.6 ft) SE from the
approximate centerline of Priest Point Drive NW. The bench mark is set 16 cm
(0.5 ft) below the ground, crimped to an aluminum rod driven 4.7 m (15.4 ft),
and encased in a WDOT monument case.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 7
Station ID: 9447717 PUBLICATION DATE: 12/11/2014
Name: PRIEST POINT
WA
NOAA Chart: 18443 Latitude: 48° 2.1' N ( 48.03494)
USGS Quad: MARYSVILLE Longitude: 122° 13.6' W (-122.22719)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 2013 PP3
DESIGNATION: PP3
MONUMENTATION: Metal Rod VM#: 21199
AGENCY: Washington State DOT IDB PID#: DP1169
SETTING CLASSIFICATION: Aluminum alloy rod OPUS PID:
LATITUDE: 48° 2.1' N ( 48.03450) LONGITUDE: 122° 14.6' W (-122.24392)
The bench mark is a disk located 9.90 m (32.5 ft) SW from the approximate
centerline of Priest Point Drive NW, 12.20 m (40.0 ft) SE of catch basin, 2.20 m
(7.2 ft) NW from power pole number TC28 and a witness post and 5.80 m (19.0 ft)
SE from the approximate centerline of 43rd Street NW. The bench mark is set 16
cm (0.5 ft) below the ground, crimped to an aluminum rod driven 9.5 m (31.2 ft),
and encased in a WDOT monument case.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 7
Station ID: 9447717 PUBLICATION DATE: 12/11/2014
Name: PRIEST POINT
WA
NOAA Chart: 18443 Latitude: 48° 2.1' N ( 48.03494)
USGS Quad: MARYSVILLE Longitude: 122° 13.6' W (-122.22719)
T I D A L D A T U M S
Tidal datums at PRIEST POINT based on:
LENGTH OF SERIES: 3 MONTHS
TIME PERIOD: July 2014 - September 2014
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION: 9447130 SEATTLE, PUGET SOUND
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
MEAN HIGHER HIGH WATER MHHW = 3.338
MEAN HIGH WATER MHW = 3.077
MEAN TIDE LEVEL MTL = 1.948
MEAN SEA LEVEL MSL = 1.939
MEAN LOW WATER MLW = 0.819
North American Vertical Datum NAVD88 = 0.575
MEAN LOWER LOW WATER MLLW = 0.000
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
7915 A 2014 4.381 1.304
7915 B 2014 3.919 0.842
2013 PP1 3.980 0.903
2013 PP2 24.082 21.005
2013 PP3 27.697 24.620
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 7 of 7
Station ID: 9447717 PUBLICATION DATE: 12/11/2014
Name: PRIEST POINT
WA
NOAA Chart: 18443 Latitude: 48° 2.1' N ( 48.03494)
USGS Quad: MARYSVILLE Longitude: 122° 13.6' W (-122.22719)
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.
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Station Location
Published bench mark
Unpublished bench mark