Bench Mark Sheet for 9432895, NORTH BEND, COOS BAY OR

Superseded Epoch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Small blue map location marker Unpublished bench mark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: 9432895                         PUBLICATION DATE:  07/26/2004
Name:       NORTH BEND, COOS BAY                              
            OR
NOAA Chart: 18587                           Latitude:   43° 24.6' N (  43.41000)
USGS Quad:  NORTH BEND                      Longitude: 124° 13.1' W (-124.21800)


To reach the tidal bench marks from the North Bend Post Office at the
intersection of McPherson and Connecticut Avenues, proceed south on McPherson
Avenue for one block, then turn left and proceed east on California Avenue for
0.5 km (0.3 mi) to Sea Term Services Inc. on the north side of California
Avenue, then enter through the south gate and proceed north for 0.3 km (0.2 mi)
to a dock located on the east side of the yard.  The bench marks are along the
Southern Pacific Railroad tracks.  The tide gage was on the inside SW corner of
the dock, and the staff was lag bolted on the southernmost dock piling.


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


                 PRIMARY BENCH MARK STAMPING:  BENCH MARK NO 3 1960 PORTLAND
                                               DIST. 1960
                         DESIGNATION:          943 2895 TIDAL 3

MONUMENTATION:           Tidal Station disk                    VM#:         8809
AGENCY:                  US Army Corps of Engineers (USE)      IDB PID#:  OA0654
SETTING CLASSIFICATION:  Sidewalk                              OPUS PID#: OA0654
LATITUDE:   43° 24.5' N (  43.40830)          LONGITUDE: 124° 13.3' W (-124.22200)


The primary bench mark is a disk set flush in a sidewalk located on the south
side and east end of California Avenue at the NE corner of the Jones Oregon
Stevedoring Company building, 71 m (232 ft) east of the centerline of the main
line of the railroad tracks, 9 m (31 ft) south of the centerline of California
Avenue, 0.3 m (1 ft) west of the east end of a 2 m (5 ft) wide concrete
sidewalk, and at ground level.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  2 of  7

                                                                                
Station ID: 9432895                         PUBLICATION DATE:  07/26/2004
Name:       NORTH BEND, COOS BAY                              
            OR
NOAA Chart: 18587                           Latitude:   43° 24.6' N (  43.41000)
USGS Quad:  NORTH BEND                      Longitude: 124° 13.1' W (-124.21800)


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


                         BENCH MARK STAMPING:  23 1917
                         DESIGNATION:          23

MONUMENTATION:           Survey disk                           VM#:         8808
AGENCY:                  US Geological Survey (USGS)           IDB PID#:  OA0499
SETTING CLASSIFICATION:  Concrete bannister                    OPUS PID:        
LATITUDE:   43° 24.3' N (  43.40500)          LONGITUDE: 124° 13.3' W (-124.22200)


The bench mark is a disk set flush in the SE concrete bannister at the top of a
flight of concrete stairs, SW of the intersection of Washington Avenue and the
Southern Pacific railroad tracks, 18 m (59 ft) south of utility pole #PPL 2513
158707 on the north side of Washington Avenue, 11 m (36 ft) west of the
centerline of the main line of the railroad tracks, and 6 m (21 ft) NE of the
centerline of Stanton Avenue.

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

                                                                                
Station ID: 9432895                         PUBLICATION DATE:  07/26/2004
Name:       NORTH BEND, COOS BAY                              
            OR
NOAA Chart: 18587                           Latitude:   43° 24.6' N (  43.41000)
USGS Quad:  NORTH BEND                      Longitude: 124° 13.1' W (-124.21800)


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


                         BENCH MARK STAMPING:  HLT 6 1965
                         DESIGNATION:          HLT 6

MONUMENTATION:           Survey disk                           VM#:         8810
AGENCY:                  US Army Corps of Engineers (USE)      IDB PID#:  OA0626
SETTING CLASSIFICATION:  Concrete step                         OPUS PID:        
LATITUDE:   43° 24.3' N (  43.40500)          LONGITUDE: 124° 13.3' W (-124.22200)


The bench mark is a disk set flush in the top NW corner of a flight of concrete
stairs, SW of the intersection of Washington Avenue and the Southern Pacific
railroad tracks, 16 m (53 ft) south of utility pole #PPL 2513 158707 on the
north side of Washington Avenue, 13 m (44 ft) west of the centerline of the main
line of the railroad tracks, and 5 m (18 ft) NE of the centerline of Stanton
Avenue.

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

                                                                                
Station ID: 9432895                         PUBLICATION DATE:  07/26/2004
Name:       NORTH BEND, COOS BAY                              
            OR
NOAA Chart: 18587                           Latitude:   43° 24.6' N (  43.41000)
USGS Quad:  NORTH BEND                      Longitude: 124° 13.1' W (-124.21800)


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


                         BENCH MARK STAMPING:  NORTH BEND TIDAL NO 1 1976
                         DESIGNATION:          NORTH BEND TIDAL 1

MONUMENTATION:           Survey disk                           VM#:         8811
AGENCY:                  US Army Corps of Engineers (USE)      IDB PID#:        
SETTING CLASSIFICATION:  Ground                                OPUS PID:        
LATITUDE:   43° 24.6' N (  43.41000)          LONGITUDE: 124° 13.1' W (-124.21800)


The bench mark is a disk set into the ground amongst gravel next to the railroad
tracks, 91 m (300 ft) north of the driveway of Sea Term Services Inc., 2 m (6
ft) east of the railroad tracks, and 1 m (2 ft) south of railroad siding switch
#3755.



                         BENCH MARK STAMPING:  NORTH BEND TIDAL 2 1976
                         DESIGNATION:          943 2895 TIDAL N BEND 2

MONUMENTATION:           Tidal Station disk                    VM#:         8812
AGENCY:                  US Army Corps of Engineers (USE)      IDB PID#:  OA0656
SETTING CLASSIFICATION:  Concrete foundation                   OPUS PID:        
LATITUDE:   43° 24.5' N (  43.40830)          LONGITUDE: 124° 13.3' W (-124.22200)


The bench mark is a disk set in short foundation remains just outside the main
doorway of Sea Term Services, Inc. warehouse, at the east side of the doorway,
and 0.3 m (1 ft) south of the wall.

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

                                                                                
Station ID: 9432895                         PUBLICATION DATE:  07/26/2004
Name:       NORTH BEND, COOS BAY                              
            OR
NOAA Chart: 18587                           Latitude:   43° 24.6' N (  43.41000)
USGS Quad:  NORTH BEND                      Longitude: 124° 13.1' W (-124.21800)


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


                         BENCH MARK STAMPING:  2895 A 1982
                         DESIGNATION:          943 2895 A TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         8814
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  OA0655
SETTING CLASSIFICATION:  Concrete pad                          OPUS PID:        
LATITUDE:   43° 24.5' N (  43.40830)          LONGITUDE: 124° 13.3' W (-124.22200)


The bench mark is a disk set flush in the west edge of a concrete pad located
between the two westernmost fuel tanks, south of the Sea Term Services, Inc.
yard, 36 m (118 ft) north of the centerline of California Street, 10 m (34 ft)
south of the chainlink fence marking the southern boundary of the Sea Term
Services yard, 8.38 m (27.5 ft) east of the south entrance to the yard, and at
ground level.  NOTE: The mark is now under fill and pavemenet of the California
Street Boat Ramp Parking Area.  It is marked on the surface by a stainless steel
washer and bolt embedded in the pavement. (Reported in 2001 by US Power
Squadron)

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

                                                                                
Station ID: 9432895                         PUBLICATION DATE:  07/26/2004
Name:       NORTH BEND, COOS BAY                              
            OR
NOAA Chart: 18587                           Latitude:   43° 24.6' N (  43.41000)
USGS Quad:  NORTH BEND                      Longitude: 124° 13.1' W (-124.21800)


                            T I D A L   D A T U M S 


Tidal datums at NORTH BEND, COOS BAY based on:

     LENGTH OF SERIES:      1 MONTH
     TIME PERIOD:           September 1982 - September 1982
     TIDAL EPOCH:           1983-2001
     CONTROL TIDE STATION:  9432780 CHARLESTON, COOS BAY


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

     MEAN HIGHER HIGH WATER                     MHHW   =  2.568
     MEAN HIGH WATER                            MHW    =  2.370
     MEAN SEA LEVEL                             MSL    =  1.424
     MEAN TIDE LEVEL                            MTL    =  1.387
     MEAN LOW WATER                             MLW    =  0.404
     North American Vertical Datum              NAVD88 =  0.295
     MEAN LOWER LOW WATER                       MLLW   =  0.000

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     BENCH MARK NO 3 1960 PORTLAND DIST.
     1960                                        3.926    1.556
     23 1917                                     8.396    6.026
     HLT 6 1965                                  8.031    5.661
     NORTH BEND TIDAL NO 1 1976                  4.948    2.578
     NORTH BEND TIDAL 2 1976                     4.706    2.336
     2895 A 1982                                 4.189    1.819


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

                                                                                
Station ID: 9432895                         PUBLICATION DATE:  07/26/2004
Name:       NORTH BEND, COOS BAY                              
            OR
NOAA Chart: 18587                           Latitude:   43° 24.6' N (  43.41000)
USGS Quad:  NORTH BEND                      Longitude: 124° 13.1' W (-124.21800)


                             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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