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Bench Mark Sheet for 9449679, Blaine, Drayton Harbor 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Superseded Epoch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Small blue map location marker Unpublished bench mark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: 9449679                         PUBLICATION DATE:  01/06/2004
Name:       BLAINE                                            
            WA
NOAA Chart: 18423                           Latitude:   48° 59.5' N (  48.99170)
USGS Quad:  BIRCH POINT                     Longitude: 122° 45.9' W (-122.76500)


To reach the tidal bench marks from Blaine City Hall on H Street, proceed west
on H Street for 1-1/2 blocks to Peace Portal Drive, then north on Peace Portal
Drive for 0.3 km (0.2 mi) to Marine Drive, continue west on Marine Drive for 1.1
km (0.7 mi) to its terminus at Drayton Harbor marina. The bench marks are
located along Burlington Northern Railway and Interstate Highway 5.  The tide
gauge and staff were on the southern end of Blaine Public Wharf.


                         T I D A L   B E N C H   M A R K S
                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  2 of  7

                                                                                
Station ID: 9449679                         PUBLICATION DATE:  01/06/2004
Name:       BLAINE                                            
            WA
NOAA Chart: 18423                           Latitude:   48° 59.5' N (  48.99170)
USGS Quad:  BIRCH POINT                     Longitude: 122° 45.9' W (-122.76500)


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


                 PRIMARY BENCH MARK STAMPING:  NO 13 1966
                         DESIGNATION:          TIDAL 13

MONUMENTATION:           Bench Mark disk                       VM#:         9306
AGENCY:                  US Coast and Geodetic Survey
                         (USC&GS)                              IDB PID#:  TR0628
SETTING CLASSIFICATION:  Concrete foundation                   OPUS PID:        
LATITUDE:   48° 59.6' N (  48.99283)          LONGITUDE: 122° 45.8' W (-122.76383)


The primary bench mark is a disk set in the NW corner of a 0.46 m x 0.76 m (1.5
ft x 2.5 ft) concrete foundation with a drainage grating, 17.83 m (58.5 ft) SW
of the centerline of McMillian Avenue,  8 m (25 ft) SW of the NE corner of a
wire fence enclosing the station, and 0.15 m (0.5 ft) WNW of the fence.



                         BENCH MARK STAMPING:  TIDE 5 1934

MONUMENTATION:           Bench Mark disk                       VM#:         9301
AGENCY:                  US Coast and Geodetic Survey
                         (USC&GS)                              IDB PID#:  TR0632
SETTING CLASSIFICATION:  Concrete foundation                   OPUS PID:        
LATITUDE:   48° 59.8' N (  48.99670)          LONGITUDE: 122° 45.2' W (-122.75300)


The bench mark is a disk set flush in the SE corner of the concrete foundation
for the SE leg of the National Weather Service warning tower located at the NW
corner of Peace Portal Drive and Marine Drive, 64 m (210 ft) east of the east
rail, 12.34 m (40.5 ft) north of the centerline of Marine Drive, 8.99 m (29.5
ft) west of the centerline of the Interstate Highway 5 exit road, 0.15 m (0.5
ft) above Peace Portal Drive, and 0.46 m (1.5 ft) above Marine Drive. 

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  3 of  7

                                                                                
Station ID: 9449679                         PUBLICATION DATE:  01/06/2004
Name:       BLAINE                                            
            WA
NOAA Chart: 18423                           Latitude:   48° 59.5' N (  48.99170)
USGS Quad:  BIRCH POINT                     Longitude: 122° 45.9' W (-122.76500)


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


                         BENCH MARK STAMPING:  NO 10 1959
                         DESIGNATION:          TIDAL 10

MONUMENTATION:           Bench Mark disk                       VM#:         9305
AGENCY:                  US Coast and Geodetic Survey
                         (USC&GS)                              IDB PID#:  TR0630
SETTING CLASSIFICATION:  Sandstone boulder                     OPUS PID:        
LATITUDE:   48° 59.6' N (  48.99330)          LONGITUDE: 122° 45.9' W (-122.76500)


The bench mark is a disk set in a 2 m (6 ft) x 2 m (6 ft) x 3 m (10 ft)
sandstone boulder located along the NW side of the causeway leading from Blaine,
WA, to the public wharf, 125 m (411 ft) NE of the extreme end of the wharf along
the centerline of the road, 19 m (62 ft) NW of the NW corner of a large white
cannery building, 6 m (20 ft) NW of the centerline of the road at the top of the
causeway, and 1 m (4 ft) below  grade.



                         BENCH MARK STAMPING:  BM 14 1973
                         DESIGNATION:          944 9679 TIDAL 14

MONUMENTATION:           Tidal Station disk                    VM#:         9307
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:        
SETTING CLASSIFICATION:  Boulder                               OPUS PID:        
LATITUDE:   48° 59.5' N (  48.99170)          LONGITUDE: 122° 45.9' W (-122.76500)


The bench mark is a disk set in the top of a large boulder of the rock rip-rap
on the north side of the causeway leading from Blaine to the public wharf, 43 m
(140 ft) ENE along the causeway from the foot of the wharf, and 8 m (25 ft)
north of the centerline of the causeway.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  4 of  7

                                                                                
Station ID: 9449679                         PUBLICATION DATE:  01/06/2004
Name:       BLAINE                                            
            WA
NOAA Chart: 18423                           Latitude:   48° 59.5' N (  48.99170)
USGS Quad:  BIRCH POINT                     Longitude: 122° 45.9' W (-122.76500)


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


                         BENCH MARK STAMPING:  B 454 1973

MONUMENTATION:           Bench Mark disk                       VM#:         9308
AGENCY:                  National Geodetic Survey (NGS)        IDB PID#:  TR0633
SETTING CLASSIFICATION:  Concrete pillars                      OPUS PID:        
LATITUDE:   48° 59.8' N (  48.99670)          LONGITUDE: 122° 45.2' W (-122.75300)


The bench mark is a disk set vertically in the west face of the west one of the
first row of concrete pillars located on Interstate Highway 5  southbound
overpass on the north side of Peace Portal Drive, 0.2 km (0.1 mi) north of the
Burlington Northern Railway station, 52 m (169 ft) NE of the centerline of the
junction of Marine Drive and Peace Portal Drive, 46.48 m (152.5 ft) ENE of bench
mark Tidal 5 1934, 3 m (10 ft) north of the north curb of the drive, 1.55 m (5.1
ft) north of the north edge of the north sidewalk, 1 m (3 ft) above the drive,
and 0.76 m (2.5 ft) above grade.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  5 of  7

                                                                                
Station ID: 9449679                         PUBLICATION DATE:  01/06/2004
Name:       BLAINE                                            
            WA
NOAA Chart: 18423                           Latitude:   48° 59.5' N (  48.99170)
USGS Quad:  BIRCH POINT                     Longitude: 122° 45.9' W (-122.76500)


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


                         BENCH MARK STAMPING:  TIDE 6 RESET 1971
                         DESIGNATION:          TIDAL 6 RESET

MONUMENTATION:           Vertical Control disk                 VM#:        17127
AGENCY:                  National Geodetic Survey (NGS)        IDB PID#:  TR0635
SETTING CLASSIFICATION:  Concrete flag pole base               OPUS PID:        
LATITUDE:   48° 59.8' N (  48.99670)          LONGITUDE: 122° 45.1' W (-122.75200)


The bench mark is a disk set in the concrete base of the flag pole directly in
front of Blaine City Hall located on the north side of "H" Street.



                         BENCH MARK STAMPING:  TIDE 4 1934

MONUMENTATION:           Bench Mark disk                       VM#:        17300
AGENCY:                  US Coast and Geodetic Survey
                         (USC&GS)                              IDB PID#:  TR0623
SETTING CLASSIFICATION:  Concrete platform                     OPUS PID:        
LATITUDE:   48° 59.8' N (  48.99670)          LONGITUDE: 122° 45.2' W (-122.75300)


The bench mark is a disk set in top of the north end of a concrete platform in
front of the west entrance to the U.S. Customs and Immigration Service Building
on Peace Portal Drive (I-5) near International Boundary, 5.64 m (18.5 ft) north
of the center of the west entrance to the building, 2.29 m (7.5 ft) east of the
centerline of the east one of five concrete vehicle inspection lanes, and 15 cm
(0.5 ft) west of the west face of the building.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  6 of  7

                                                                                
Station ID: 9449679                         PUBLICATION DATE:  01/06/2004
Name:       BLAINE                                            
            WA
NOAA Chart: 18423                           Latitude:   48° 59.5' N (  48.99170)
USGS Quad:  BIRCH POINT                     Longitude: 122° 45.9' W (-122.76500)


                            T I D A L   D A T U M S 


Tidal datums at BLAINE based on:

     LENGTH OF SERIES:      1 YEAR
     TIME PERIOD:           May 1974 - April 1975
     TIDAL EPOCH:           1983-2001
     CONTROL TIDE STATION:  9449424 CHERRY POINT, STRAIT OF GEORGIA


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

     HIGHEST OBSERVED WATER LEVEL (01/15/1974)         =  3.757
     MEAN HIGHER HIGH WATER                     MHHW   =  2.905
     MEAN HIGH WATER                            MHW    =  2.643
     MEAN TIDE LEVEL                            MTL    =  1.727
     MEAN SEA LEVEL                             MSL    =  1.670
     MEAN LOW WATER                             MLW    =  0.810
     North American Vertical Datum              NAVD88 =  0.310
     MEAN LOWER LOW WATER                       MLLW   =  0.000
     LOWEST  OBSERVED WATER LEVEL (12/31/1974)         = -1.092

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     NO 13 1966                                  4.833    2.190
     TIDE 5 1934                                11.186    8.543
     NO 10 1959                                  3.770    1.127
     BM 14 1973                                  4.687    2.044
     B 454 1973                                 13.080   10.437
     TIDE 6 RESET 1971                          15.565   12.922
     TIDE 4 1934                                12.267    9.624


                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  7 of  7

                                                                                
Station ID: 9449679                         PUBLICATION DATE:  01/06/2004
Name:       BLAINE                                            
            WA
NOAA Chart: 18423                           Latitude:   48° 59.5' N (  48.99170)
USGS Quad:  BIRCH POINT                     Longitude: 122° 45.9' W (-122.76500)


                             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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Products available at 9449679 Blaine, Drayton Harbor, WA

Revised: 08/08/2018
NOAA / National Ocean Service
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