Bench Mark Sheet for 9448009, Spee-Bi-Dah WA

Superseded Epoch

Large map location marker Station Location
Small red map location marker Published bench mark
Small blue map location marker Unpublished bench mark

Bench mark positions only appear on the map if their coordinates in the CO-OPS database are at the precision of degrees/minutes/seconds/and tenths of seconds. If the coordinates are less precise, the mark will not appear.

Printable version

                          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.

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