Bench Mark Sheet for 9445719, POULSBO 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Superseded Epoch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Small blue map location marker Unpublished bench mark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: 9445719                         PUBLICATION DATE:  06/23/2003
Name:       POULSBO                                           
            WA
NOAA Chart: 18446                           Latitude:   47° 43.5' N (  47.72500)
USGS Quad:  POULSBO                         Longitude: 122° 38.3' W (-122.63800)


To reach the tidal bench marks from Paulsbo, Liberty Bay, proceed south on
Fourth Avenue to the intersection of Fourth and Third Avenues, south along Third
Avenue to the Keypoint Oyster Company property, then east to the Marine
Environmental Center.  The tide gage and staff were on the SW end of the Marine
Science Center dock and the tidal bench marks are located along the the beach.


                         T I D A L   B E N C H   M A R K S


                 PRIMARY BENCH MARK STAMPING:  NO 4 1972
                         DESIGNATION:          944 5719 TIDAL 4

MONUMENTATION:           Tidal Station disk                    VM#:         9084
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:        
SETTING CLASSIFICATION:  Concrete walkway                      OPUS PID:        
LATITUDE:   47° 43.5' N (  47.72500)          LONGITUDE: 122° 38.3' W (-122.63800)


The primary bench mark is a disk set in the top at the SE edge of the concrete
walkway to the building entrance at the Marine Environmental Center, at the
North Kitsap School District No. 400 Building, 4 m (13 ft) NE of the entrance
doorway, and 3.66 m (12.0 ft) SW of the NE edge of the walkway.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  2 of  6

                                                                                
Station ID: 9445719                         PUBLICATION DATE:  06/23/2003
Name:       POULSBO                                           
            WA
NOAA Chart: 18446                           Latitude:   47° 43.5' N (  47.72500)
USGS Quad:  POULSBO                         Longitude: 122° 38.3' W (-122.63800)


                         T I D A L   B E N C H   M A R K S


                         BENCH MARK STAMPING:  NO 6 1972
                         DESIGNATION:          944 5719 TIDAL 6

MONUMENTATION:           Tidal Station disk                    VM#:         9085
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:        
SETTING CLASSIFICATION:  Concrete step                         OPUS PID:        
LATITUDE:   47° 43.5' N (  47.72500)          LONGITUDE: 122° 38.3' W (-122.63800)


The bench mark is a disk set in the south of the first step of six leading to a
walkway to a 2-story wood frame house at 634 Third Avenue, 11.28 m (37.0 ft)
north of the centerline of the entrance to two diverging driveways, and 4.57 m
(15.0 ft) east of the centerline of Third Avenue.



                         BENCH MARK STAMPING:  NO 7 1972
                         DESIGNATION:          944 5719 TIDAL 7

MONUMENTATION:           Tidal Station disk                    VM#:         9086
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:        
SETTING CLASSIFICATION:  Concrete pad                          OPUS PID:        
LATITUDE:   47° 43.5' N (  47.72500)          LONGITUDE: 122° 38.3' W (-122.63800)


The bench mark is a disk set at the SE corner on the east side of a concrete
platform of the pumphouse and restroom located in the SE corner of the Municipal
Park, at the NW corner of the intersection of Fourth and Third Avenues, 11.28 m
(37.0 ft) west of the centerline of Fourth Avenue, 2.29 m (7.5 ft) south of the
north edge of the platform, 0.91 m (3.0 ft) east of the east side of the
pumphouse.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  3 of  6

                                                                                
Station ID: 9445719                         PUBLICATION DATE:  06/23/2003
Name:       POULSBO                                           
            WA
NOAA Chart: 18446                           Latitude:   47° 43.5' N (  47.72500)
USGS Quad:  POULSBO                         Longitude: 122° 38.3' W (-122.63800)


                         T I D A L   B E N C H   M A R K S


                         BENCH MARK STAMPING:  NO 8 1972
                         DESIGNATION:          944 5719TIDAL 8

MONUMENTATION:           Tidal Station disk                    VM#:         9087
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:        
SETTING CLASSIFICATION:  Concrete step                         OPUS PID:        
LATITUDE:   47° 43.5' N (  47.72500)          LONGITUDE: 122° 38.3' W (-122.63800)


The bench mark is a disk set on the NE edge of the first concrete step of the
entrance to the Inlet Marine Building at 243 Third Avenue, 10.36 m (34.0 ft) SW
of the centerline of Third Avenue, and 0.46 m (1.5 ft) NE of the NE corner of
the building.



                         BENCH MARK STAMPING:  TIDAL 5717 J 1976
                         DESIGNATION:          944 5719 J TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         9088
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:        
SETTING CLASSIFICATION:  Concrete cap                          OPUS PID:        
LATITUDE:   47° 43.5' N (  47.72500)          LONGITUDE: 122° 38.3' W (-122.63800)


The bench mark is a disk set in the SW corner of a 1.83 m x 2.13 m (6.0 ft x 7.0
ft) concrete cap around the fire hydrant, 10.67 m (35.0 ft) west of the
centerline of Third Avenue, 9.14 m (30.0 ft) south of the centerline of the
driveway leading to the Marine Science Center, and 1.52 m (5.0 ft) SW of a fire
hydrant.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  4 of  6

                                                                                
Station ID: 9445719                         PUBLICATION DATE:  06/23/2003
Name:       POULSBO                                           
            WA
NOAA Chart: 18446                           Latitude:   47° 43.5' N (  47.72500)
USGS Quad:  POULSBO                         Longitude: 122° 38.3' W (-122.63800)


                         T I D A L   B E N C H   M A R K S


                         BENCH MARK STAMPING:  NO 5 1972
                         DESIGNATION:          944 5719 TIDAL 5

MONUMENTATION:           Tidal Station disk                    VM#:        16989
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:        
SETTING CLASSIFICATION:  Concrete walkway                      OPUS PID:        
LATITUDE:   47° 43.5' N (  47.72500)          LONGITUDE: 122° 38.3' W (-122.63800)


The bench mark is a disk set in a concrete walkway at the SE corner of the
Willapoint Coast Oyster Sales Building on Third Avenue, 8 m (26 ft) NW of the
centerline of a concrete driveway leading to a workshed, 4 m (14 ft) NE of the
edge of a wooden dock where it joins a concrete walkway, and 0.15 m (0.5 ft) SE
of the SE side of the Oyster Sales Building.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  5 of  6

                                                                                
Station ID: 9445719                         PUBLICATION DATE:  06/23/2003
Name:       POULSBO                                           
            WA
NOAA Chart: 18446                           Latitude:   47° 43.5' N (  47.72500)
USGS Quad:  POULSBO                         Longitude: 122° 38.3' W (-122.63800)


                            T I D A L   D A T U M S 


Tidal datums at POULSBO based on:

     LENGTH OF SERIES:      2 Years
     TIME PERIOD:           January 1975 - December 1976
     TIDAL EPOCH:           1983-2001
     CONTROL TIDE STATION:  9447130 SEATTLE, PUGET SOUND


Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:

     HIGHEST OBSERVED WATER LEVEL (11/02/1976)         =  4.493
     MEAN HIGHER HIGH WATER                     MHHW   =  3.575
     MEAN HIGH WATER                            MHW    =  3.307
     MEAN TIDE LEVEL                            MTL    =  2.089
     MEAN SEA LEVEL                             MSL    =  2.081
     MEAN LOW WATER                             MLW    =  0.871
     MEAN LOWER LOW WATER                       MLLW   =  0.000
     LOWEST  OBSERVED WATER LEVEL (01/19/1984)         = -1.810

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     NO 4 1972                                   5.011    1.704
     NO 6 1972                                   6.056    2.749
     NO 7 1972                                   5.605    2.298
     NO 8 1972                                   5.308    2.001
     TIDAL 5717 J 1976                           6.947    3.640
     NO 5 1972                                   4.813    1.506


                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  6 of  6

                                                                                
Station ID: 9445719                         PUBLICATION DATE:  06/23/2003
Name:       POULSBO                                           
            WA
NOAA Chart: 18446                           Latitude:   47° 43.5' N (  47.72500)
USGS Quad:  POULSBO                         Longitude: 122° 38.3' W (-122.63800)


                             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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