Bench Mark Sheet for 9447717, Priest Point 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Superseded Epoch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Small blue map location marker Unpublished bench mark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  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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