Superseded Bench Mark Sheet for 9449211, BELLINGHAM WA

Present Epoch

Printable version

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
Datums Page                                                        Page  1 of  6

                                                   PUBLICATION DATE:  05/12/1989
Station ID: 9449211                                SUPERCEDED DATE:   04/21/2003
Name:       BELLINGHAM, BELLINGHAM BAY                        
            WASHINGTON
NOAA Chart: 18424                                  Latitude:         48° 44.7' N
USGS Quad:  BELLINGHAM SOUTH                       Longitude:       122° 29.7' W


To reach the tidal bench marks from the intersection of West Holly Street and
Cornwall Avenue in downtown Bellingham, proceed SW on Cornwall Avenue to the
entrance of Port of Bellingham North Terminal, then NW on Beal Memorial Way to
the waterfront.  The bench marks are in the vicinity of the North Terminal and
the Standard Oil pier near Roeder Avenue and C Street.  The tide gage and staff
were at the SW end of Port of Bellingham North Terminal.


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


                 PRIMARY BENCH MARK STAMPING:  7 1934

MONUMENTATION:           Survey Disk                               VM#:     9287
AGENCY:                                                            PID#:  TR0031
SETTING CLASSIFICATION:  Large Structure


The bench mark is set vertically in the north face of and near the NW corner of
the Georgia Pacific Corporation Building at the south corner of the intersection
of Central and Roeder Avenues, 2 blocks SE of the Burlington Northern Railway
station, SW of the tracks, 1.2 feet (0.4 m) SE of the north corner of the
building, and 4 feet (1 m) above ground level.



                         BENCH MARK STAMPING:  PRIM TRAV STA NO 7 67 B 1917 WASH

MONUMENTATION:           Survey Disk                               VM#:     9285
AGENCY:                                                            PID#:  TR0032
SETTING CLASSIFICATION:  Cement Block


The bench mark is set in the top of a cement block base of a column on the north
side of the front entrance to Bellingham Public Museum, at the top of the NW
concrete balustrade, on the west side of Prospect Street between West Champion
and Floral Streets, 2 feet (1 m) NW of the NW end of the concrete steps near the
base of the column, and 8 feet (2 m) above sidewalk level.

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

                                                   PUBLICATION DATE:  05/12/1989
Station ID: 9449211                                SUPERCEDED DATE:   04/21/2003
Name:       BELLINGHAM, BELLINGHAM BAY                        
            WASHINGTON
NOAA Chart: 18424                                  Latitude:         48° 44.7' N
USGS Quad:  BELLINGHAM SOUTH                       Longitude:       122° 29.7' W


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


                         BENCH MARK STAMPING:  6 1934

MONUMENTATION:           Survey Disk                               VM#:     9286
AGENCY:                                                            PID#:  TR0033
SETTING CLASSIFICATION:  Concrete Abutment


The bench mark is set in the top of the NE end of the NW concrete abutment of
the Chestnut Street overhead bridge (viaduct) of the Burlington Northern Railway
located at the T-intersection of Bay and West Chestnut Street, 30 feet (9 m) NW
of Bay Street, 27 feet (8 m) NE of the centerline of Chestnut Street, and 1 foot
(0.3 m) below street level.



                         BENCH MARK STAMPING:  8 1934

MONUMENTATION:           Survey Disk                               VM#:     9288
AGENCY:                                                            PID#:  TR0030
SETTING CLASSIFICATION:  Small Structure


The bench mark is set vertically in the SE face of and near the east corner of a
small one-story stucco building occupied by A.C. Northwest at 1111 C Street, at
the intersection of Roeder Avenue and C Street, 180 feet (55 m) east of a way
station of the Burlington Northern Railway, on the SW side of the tracks, 1.5
feet (0.5 m) NW of the east corner of the building, and 2 feet (1 m) above
ground level.



                         BENCH MARK STAMPING:  9 1973

MONUMENTATION:           Survey Disk                               VM#:     9289
AGENCY:                                                            PID:         
SETTING CLASSIFICATION:  Concrete Wall


The bench mark is set in top of a 0.5-foot (0.2 m) wide (at top) by 4-foot (1 m)
high concrete wall surrounding the Standard Oil storage tanks, 90 feet (27 m) NW
of the SW end of C street, and 2.5 feet (0.8 m) NE of the south corner of the
wall.

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

                                                   PUBLICATION DATE:  05/12/1989
Station ID: 9449211                                SUPERCEDED DATE:   04/21/2003
Name:       BELLINGHAM, BELLINGHAM BAY                        
            WASHINGTON
NOAA Chart: 18424                                  Latitude:         48° 44.7' N
USGS Quad:  BELLINGHAM SOUTH                       Longitude:       122° 29.7' W


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


                         BENCH MARK STAMPING:  10 1973

MONUMENTATION:           Survey Disk                               VM#:     9290
AGENCY:                                                            PID:         
SETTING CLASSIFICATION:  Concrete Buttress


The bench mark is set in the top of a 1-foot (0.3 m) square by 4-foot (1 m) high
concrete buttress along the SE concrete wall surrounding the Standard Oil
storage tanks, 108 feet (33 m) SE of the SW end of C Street, and 2.8 feet (0.9
m) NE of the south corner of the wall.



                         BENCH MARK STAMPING:  11 1973

MONUMENTATION:           Survey Disk                               VM#:     9291
AGENCY:                                                            PID:         
SETTING CLASSIFICATION:  Concrete Platform


The bench mark is set in the top of the raised loading platform at the south
corner of the large concrete transit shed of Port of Bellingham, 0.3 mile (0.5
km) NW along Beal Memorial Way from its intersection with Cornwall Avenue, 2.4
feet (0.7 m) NE of a hydrant, 0.8 foot (0.2 m) SE of the south corner of the
shed, and 3.2 feet (1.0 m) above ground level.



                         BENCH MARK STAMPING:  12 1973

MONUMENTATION:           Survey Disk                               VM#:     9292
AGENCY:                                                            PID:         
SETTING CLASSIFICATION:  Concrete Base


The bench mark is set on top of the NE edge of a 28-foot (9 m) diameter concrete
base of a former storage tank, near Bench Mark 11 1973, 61.3 feet (18.7 m) SE of
the east corner of the large concrete transit shed of Port of Bellingham, 22.5
feet (6.9 m) SW of a wooden sea wall, 19.5 feet (5.9 m) SSW of a wooden pole,
1.2 feet (0.4 m) NW of a 0.7-foot (0.2 m) wide groove in the concrete base, and
0.5 foot (0.2 m) SW of the edge of the concrete base.

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

                                                   PUBLICATION DATE:  05/12/1989
Station ID: 9449211                                SUPERCEDED DATE:   04/21/2003
Name:       BELLINGHAM, BELLINGHAM BAY                        
            WASHINGTON
NOAA Chart: 18424                                  Latitude:         48° 44.7' N
USGS Quad:  BELLINGHAM SOUTH                       Longitude:       122° 29.7' W


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


                         BENCH MARK STAMPING:  U 454 1973

MONUMENTATION:           Survey Disk                               VM#:     9293
AGENCY:                                                            PID#:  TR0034
SETTING CLASSIFICATION:  Concrete Curb


The bench mark is set on the NW concrete curb of the Cornwall Avenue overpass
(over the tracks of Burlington Northern Railway), 60 feet (18 m) west of the
centerline intersection of Cornwall Avenue and East Maple Street, and 1 foot
(0.3 m) above street level.



                         BENCH MARK STAMPING:  13 1974

MONUMENTATION:           Survey Disk                               VM#:     9294
AGENCY:                                                            PID:         
SETTING CLASSIFICATION:  Concrete Foundation


The bench mark is set flush in the outer foundation of the sliding door on the
SW side of the brick sewage pumping station at the intersection of Cornwall
Avenue and Beal Memorial Way, opposite the entrance to Port of Bellingham North
Terminal, 111 feet (34 m) SE of the centerline of Cornwall Avenue, and 1 foot
(0.3 m) NW of the SE side of the sliding door.



                         BENCH MARK STAMPING:  N 6 RESET

MONUMENTATION:           Survey Disk                               VM#:     9295
AGENCY:                                                            PID#:  TR0029
SETTING CLASSIFICATION:  Concrete Foundation


The bench mark is set vertically in the SW face of the concrete foundation at
the Burlington Northern Railway station, 150 feet (46 m) north of the inter-
section of C Street and Roeder Avenue, 1.5 feet (0.5 m) NW of the south corner
of the foundation, and 0.5 foot (0.2 m) above the sidewalk.

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

                                                   PUBLICATION DATE:  05/12/1989
Station ID: 9449211                                SUPERCEDED DATE:   04/21/2003
Name:       BELLINGHAM, BELLINGHAM BAY                        
            WASHINGTON
NOAA Chart: 18424                                  Latitude:         48° 44.7' N
USGS Quad:  BELLINGHAM SOUTH                       Longitude:       122° 29.7' W


                            T I D A L   D A T U M S 


Tidal datums at BELLINGHAM, BELLINGHAM BAY based on:

     LENGTH OF SERIES:      1 YEAR
     TIME PERIOD:           FEBRUARY 1974 - JANUARY 1975
     TIDAL EPOCH:           1960-1978
     CONTROL TIDE STATION:  9449880 FRIDAY HARBOR


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

     HIGHEST OBSERVED WATER LEVEL (01/05/1975)         =  10.52
     MEAN HIGHER HIGH WATER                     MHHW   =   8.46
     MEAN HIGH WATER                            MHW    =   7.70
     MEAN TIDE LEVEL                            MTL    =   5.09
   * NATIONAL GEODETIC VERTICAL DATUM           NGVD29 =   4.51
     MEAN LOW WATER                             MLW    =   2.48
     MEAN LOWER LOW WATER                       MLLW   =   0.00
     LOWEST  OBSERVED WATER LEVEL (12/30/1974)         =  -3.37

   * NGVD reference based on adjustment of 3/14/78 and NOS levels of 1975. 
North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In FEET above:

     Stamping or Designation                    MLLW        MHW

     7 1934                                     20.84     13.14
     PRIM TRAV STA NO 7 67 B 1917 WASH          73.00     65.30
     6 1934                                     41.55     33.85
     8 1934                                     20.76     13.06
     9 1973                                     18.67     10.97
     10 1973                                    17.61      9.91
     11 1973                                    18.31     10.61
     12 1973                                    15.26      7.56
     U 454 1973                                 40.14     32.44
     13 1974                                    16.91      9.21
     N 6 RESET                                  20.08     12.38


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

                                                   PUBLICATION DATE:  05/12/1989
Station ID: 9449211                                SUPERCEDED DATE:   04/21/2003
Name:       BELLINGHAM, BELLINGHAM BAY                        
            WASHINGTON
NOAA Chart: 18424                                  Latitude:         48° 44.7' N
USGS Quad:  BELLINGHAM SOUTH                       Longitude:       122° 29.7' W


                             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 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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