U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 6
Station ID: 9448009 PUBLICATION DATE: 11/07/2014
Name: SPEE-BI-DAH
WA
NOAA Chart: 18423 Latitude: 48° 5.3' N ( 48.08825)
USGS Quad: TULALIP Longitude: 122° 19.3' W (-122.32233)
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 9.1 miles to a left turn on 108 St NW. This is
the entrance road to Spee-Bi-Dah which is a gated community so you will need a
contact with the community or Tulalip Tribe to open the gate. Continue on 108
St. NW which becomes Scenic Dr NW and ends at a park along the waterfront. Park
at the waterfront and continue south on foot to the gauge atop a large concrete
block at the approximate high water line.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 8009 B 2014
DESIGNATION: 944 8009 B
MONUMENTATION: Flange-encased Rod VM#: 21099
AGENCY: National Ocean Service IDB PID#:
SETTING CLASSIFICATION: Steel rod OPUS PID:
LATITUDE: 48° 5.5' N ( 48.09150) LONGITUDE: 122° 19.5' W (-122.32498)
THE PRIMARY BENCH MARK IS A 9/16 INCH (14 MM) STAINLESS ROD DRIVEN 31 FT (9.4 M)
TO REFUSAL S OF THE INTERSECTION OF PARK WAY AND FIR DRIVE IN THE SPEE-BI-DAH
COMMUNITY PARK, LOCATED 5.05 M (16.6 FT) NE OF THE W TOE OF A CONCRETE BLOCK
WALL, 4.85 M (15.9 FT) S OF THE NW CORNER OF A STORAGE SHED, 1.95 M (6.4 FT) N
OF A CONCRETE BLOCK WALL WITH METAL WITNESS SIGN ATTACHED.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 6
Station ID: 9448009 PUBLICATION DATE: 11/07/2014
Name: SPEE-BI-DAH
WA
NOAA Chart: 18423 Latitude: 48° 5.3' N ( 48.08825)
USGS Quad: TULALIP Longitude: 122° 19.3' W (-122.32233)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 8009 A 2014
DESIGNATION: 944 8009 A
MONUMENTATION: Bench Mark disk VM#: 21100
AGENCY: National Ocean Service IDB PID#:
SETTING CLASSIFICATION: Concrete block OPUS PID:
LATITUDE: 48° 5.4' N ( 48.08950) LONGITUDE: 122° 19.4' W (-122.32395)
THE BENCH MARK IS A DISK SET IN THE TOP OF A CONCRETE BLOCK ON THE TULALIP
TRIBAL BEACH S OF THE SPEE-BI-DAH COMMUNITY, LOCATED 1.9 M (6.2 FT) N OF THE S
CORNER OF THE BLOCK, 1.6 M (5.2 FT) S OF N CORNER, 0.4 M (1.3 FT) E OF THE W
EDGE AND 1.3 M (4.3 FT) ABOVE THE BEACH.
BENCH MARK STAMPING: 8009 C 2014
DESIGNATION: 944 8009 C
MONUMENTATION: Flange-encased Rod VM#: 21101
AGENCY: National Ocean Service IDB PID#:
SETTING CLASSIFICATION: Steel rod OPUS PID:
LATITUDE: 48° 5.5' N ( 48.09182) LONGITUDE: 122° 19.4' W (-122.32362)
THE BENCH MARK IS A 9/16 INCH (14 MM) STAINLESS STEEL ROD DRIVEN 35.5 FT (10.8
M) TO REFUSAL AT THE E POINT OF THE SPEE-BI-DAH COMMUNITY PARK, LOCATED 3.8 M
(12.5 FT) N OF THE S EDGE OF SCENIC DRIVE NW, 2.7 M (8.9 FT) S OF THE N EDGE OF
PARK WAY, AND 2.7 M (8.9 FT) W OF A METAL WITNESS SIGN FASTENED TO BACK OF 'GOLF
CART X-ING' SIGN.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 6
Station ID: 9448009 PUBLICATION DATE: 11/07/2014
Name: SPEE-BI-DAH
WA
NOAA Chart: 18423 Latitude: 48° 5.3' N ( 48.08825)
USGS Quad: TULALIP Longitude: 122° 19.3' W (-122.32233)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: SBD2 2013
DESIGNATION: SBD2
MONUMENTATION: Bench Mark disk VM#: 21102
AGENCY: WA DOT IDB PID#: DP1199
SETTING CLASSIFICATION: Aluminum rod OPUS PID:
LATITUDE: 48° 5.5' N ( 48.09203) LONGITUDE: 122° 19.5' W (-122.32517)
THE BENCHMARK IS A DISK SET ON AN ALUMINUM ALLOY ROD DRIVEN 10.7 M (35.1 FT),
LOCATED 1.8 M (5.9 FT) NE FROM A FLAG POLE, 5.7 M (18.7 FT) NE FROM CENTERLINE
OF SCENIC DRIVE, 6.4 M (21.0 FT) NW FROM STORM DRAIN COVER AND 12.3 M (40.4 FT)
NW FROM EXTENDED CENTERLINE OF BOAT LAUNCH AND 3 CM (1.2 IN) BELOW GROUND LEVEL.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 6
Station ID: 9448009 PUBLICATION DATE: 11/07/2014
Name: SPEE-BI-DAH
WA
NOAA Chart: 18423 Latitude: 48° 5.3' N ( 48.08825)
USGS Quad: TULALIP Longitude: 122° 19.3' W (-122.32233)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: SBD1 2013
DESIGNATION: SBD1
MONUMENTATION: Bench Mark disk VM#: 21103
AGENCY: WA DOT IDB PID#: DP1198
SETTING CLASSIFICATION: Aluminum rod OPUS PID:
LATITUDE: 48° 5.5' N ( 48.09217) LONGITUDE: 122° 19.5' W (-122.32467)
THE BENCHMARK IS A DISK SET ON AN ALUMINUM ALLOY ROD DRIVEN 9.2 M (30.2 FT),
LOCATED 4.3 M (14.1 FT) SW FROM A POWER POLE NUMBER TM11 WITH 5 GUY WIRES AND
WITNESS POST, 6.8 M (22.3 FT) SW FROM CENTERLINE OF SCENIC DRIVE, 6.3 M (20.7
FT) NW FROM EXTENDED CENTERLINE OF MAPLE STREET AND 17.1 M (56.1 FT) NW FROM
STORM DRAIN COVER AND 3 CM (1.2 IN) BELOW GROUND LEVEL.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 6
Station ID: 9448009 PUBLICATION DATE: 11/07/2014
Name: SPEE-BI-DAH
WA
NOAA Chart: 18423 Latitude: 48° 5.3' N ( 48.08825)
USGS Quad: TULALIP Longitude: 122° 19.3' W (-122.32233)
T I D A L D A T U M S
Tidal datums at SPEE-BI-DAH based on:
LENGTH OF SERIES: 3 MONTHS
TIME PERIOD: June 2014 - August 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 = 3.421
MEAN HIGH WATER MHW = 3.159
MEAN TIDE LEVEL MTL = 2.006
MEAN SEA LEVEL MSL = 2.001
MEAN LOW WATER MLW = 0.854
North American Vertical Datum NAVD88 = 0.596
MEAN LOWER LOW WATER MLLW = 0.000
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
8009 B 2014 4.577 1.418
8009 A 2014 4.469 1.310
8009 C 2014 12.484 9.325
SBD2 2013 4.619 1.460
SBD1 2013 5.582 2.423
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 6
Station ID: 9448009 PUBLICATION DATE: 11/07/2014
Name: SPEE-BI-DAH
WA
NOAA Chart: 18423 Latitude: 48° 5.3' N ( 48.08825)
USGS Quad: TULALIP Longitude: 122° 19.3' W (-122.32233)
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.