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Bench Mark Sheet for 9414711, OAKLAND AIRPORT, SAN FRANCISCO BAY CA

Superseded Epoch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Small blue map location marker Unpublished bench mark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  5

                                                                                
Station ID: 9414711                         PUBLICATION DATE:  02/26/2004
Name:       OAKLAND AIRPORT, SAN FRANCISCO BAY                
            CA
NOAA Chart: 18649                           Latitude:   37° 43.9' N (  37.73170)
USGS Quad:  SAN LEANDRO                     Longitude: 122° 12.5' W (-122.20800)


To reach the tidal bench marks from Oakland, proceed along State Route 17 and
exit at Hegenberger Road south, then proceed SW along Hegenberger Road for 1.8
km (1.1 mi) to Doolittle Drive, then turn right and proceed NW on Doolittle
Drive for 1.1 km (0.7 mi) to the southernmost end of airport channel.  The bench
marks are along Doolittle Drive and Ehrhart Road.  The tide gage and staff were
located on the airport channel wharf off Doolittle Drive south of San Leandro
Bay.


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


                 PRIMARY BENCH MARK STAMPING:  2 1936
                         DESIGNATION:          941 4711 TIDAL 2

MONUMENTATION:           Tidal Station disk                    VM#:         8388
AGENCY:                  US Coast and Geodetic Survey
                         (USC&GS)                              IDB PID#:  HT0277
SETTING CLASSIFICATION:  Concrete block                        OPUS PID:        
LATITUDE:   37° 43.8' N (  37.73000)          LONGITUDE: 122° 12.6' W (-122.21000)


The primary bench mark is a disk set on the top of a concrete block at the NE
corner of Hangar 4 (United Airlines), located on the south side of San Leandro
Bay at Oakland Airport,  3.47 m (11.4 ft) SW of the SW curb of the drive, 0.94 m
(3.1 ft) SW of the north corner of the hangar, and 1 m (2 ft) above the
sidewalk.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  2 of  5

                                                                                
Station ID: 9414711                         PUBLICATION DATE:  02/26/2004
Name:       OAKLAND AIRPORT, SAN FRANCISCO BAY                
            CA
NOAA Chart: 18649                           Latitude:   37° 43.9' N (  37.73170)
USGS Quad:  SAN LEANDRO                     Longitude: 122° 12.5' W (-122.20800)


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


                         BENCH MARK STAMPING:  3 1936
                         DESIGNATION:          941 4711 TIDAL 3

MONUMENTATION:           Tidal Station disk                    VM#:         8389
AGENCY:                  US Coast and Geodetic Survey
                         (USC&GS)                              IDB PID#:  HT0279
SETTING CLASSIFICATION:  Concrete block                        OPUS PID:        
LATITUDE:   37° 43.8' N (  37.73000)          LONGITUDE: 122° 12.5' W (-122.20800)


The bench mark is a disk set on the top of a concrete block at the NE corner of
Hangar 3 (U.S. Navy) located on the south side of San Leandro Bay at Oakland
Airport, and 0.61 m (2.0 ft) above the street.



                         BENCH MARK STAMPING:  4 RESET 1961
                         DESIGNATION:          941 4711 TIDAL 4 RESET

MONUMENTATION:           Tidal Station disk                    VM#:         8390
AGENCY:                  US Coast and Geodetic Survey
                         (USC&GS)                              IDB PID#:  HT0257
SETTING CLASSIFICATION:  Concrete wall                         OPUS PID:        
LATITUDE:   37° 43.6' N (  37.72670)          LONGITUDE: 122° 12.1' W (-122.20200)


The bench mark is a disk set vertically in NE wall of square concrete telephone
terminal building located near the main entrance to Oakland Airport, 160 m (525
ft) NW of the intersection of Hegenberger Road, 98th Avenue, Doolittle Drive and
Earhart Road, 33 m (107 ft) SW of the center of Doolittle Drive, 20 m (66 ft) SW
of a guyed telephone powerline pole, 9.66 m (31.7 ft) north of the SE corner of
Trans-International Airliner building, and 1 m (3 ft) above the pavement.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  3 of  5

                                                                                
Station ID: 9414711                         PUBLICATION DATE:  02/26/2004
Name:       OAKLAND AIRPORT, SAN FRANCISCO BAY                
            CA
NOAA Chart: 18649                           Latitude:   37° 43.9' N (  37.73170)
USGS Quad:  SAN LEANDRO                     Longitude: 122° 12.5' W (-122.20800)


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


                         BENCH MARK STAMPING:  4711 F 1977
                         DESIGNATION:          941 4711 F TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         8391
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:        
SETTING CLASSIFICATION:  Copper-clad steel rod                 OPUS PID:        
LATITUDE:   37° 43.9' N (  37.73170)          LONGITUDE: 122° 12.5' W (-122.20800)


The bench mark is a disk located 0.6 km (0.4 mi) NW along Doolittle Drive from
the intersection of Doolittle Drive and Hegenberger Road, 24.7 m (81 ft) WSW of
railroad right of way, 7.53 m (24.7 ft) WNW of the NW corner of the East Bay
Municipal Utility District (Special District No. 1 sewage pumping station 6),
and 2.07 m (6.8 ft) ENE of the NE corner post in the fenced yard of the Port of
Oakland Airport maintenance yard.  The bench mark is crimped to the top of a
copper-clad steel rod driven 9.8 m (32 ft) to refusal.



                         BENCH MARK STAMPING:  4711 G 1977
                         DESIGNATION:          941 4711 G TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         8392
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:        
SETTING CLASSIFICATION:  Copper-clad steel rod                 OPUS PID:        
LATITUDE:   37° 43.9' N (  37.73170)          LONGITUDE: 122° 12.5' W (-122.20800)


The bench mark is a disk located 0.3 km (0.2 mi) NW along Doolittle Drive from
the intersection of Doolittle Drive and Hegenberger Drive, 17.53 m (57.5 ft)
east of the SE corner of Space Air Supply Company Building No. 151 at Oakland
Airport, and 4.18 m (13.7 ft) SE of the southeasternmost corner of a corner post
for a wire fence around building No. 151 at the south edge of an abandoned
railroad right of way.  The bench mark is crimped to the top of a copper-clad
steel rod driven 14.6 m (48 ft) to refusal.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  4 of  5

                                                                                
Station ID: 9414711                         PUBLICATION DATE:  02/26/2004
Name:       OAKLAND AIRPORT, SAN FRANCISCO BAY                
            CA
NOAA Chart: 18649                           Latitude:   37° 43.9' N (  37.73170)
USGS Quad:  SAN LEANDRO                     Longitude: 122° 12.5' W (-122.20800)


                            T I D A L   D A T U M S 


Tidal datums at OAKLAND AIRPORT, SAN FRANCISCO BAY based on:

     LENGTH OF SERIES:      3 MONTHS
     TIME PERIOD:           April 1977 - June 1977
     TIDAL EPOCH:           1983-2001
     CONTROL TIDE STATION:  9414750 ALAMEDA, SAN FRANCISCO BAY


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

     MEAN HIGHER HIGH WATER                     MHHW   =  2.060
     MEAN HIGH WATER                            MHW    =  1.867
     MEAN TIDE LEVEL                            MTL    =  1.104
     MEAN SEA LEVEL                             MSL    =  1.087
     MEAN LOW WATER                             MLW    =  0.342
     North American Vertical Datum              NAVD88 =  0.073
     MEAN LOWER LOW WATER                       MLLW   =  0.000

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     2 1936                                      1.710   -0.157
     3 1936                                      2.069    0.202
     4 RESET 1961                                2.984    1.117
     4711 F 1977                                 1.913    0.046
     4711 G 1977                                 1.748   -0.119


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

                                                                                
Station ID: 9414711                         PUBLICATION DATE:  02/26/2004
Name:       OAKLAND AIRPORT, SAN FRANCISCO BAY                
            CA
NOAA Chart: 18649                           Latitude:   37° 43.9' N (  37.73170)
USGS Quad:  SAN LEANDRO                     Longitude: 122° 12.5' W (-122.20800)


                             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 9414711 OAKLAND AIRPORT, SAN FRANCISCO BAY, CA

Revised: 10/15/2013
NOAA / National Ocean Service
Web site owner: Center for Operational Oceanographic Products and Services