U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 6
Station ID: 9414392 PUBLICATION DATE: 10/31/2005
Name: OYSTER POINT MARINA, SAN FRANCISCO BAY
CA
NOAA Chart: 18651 Latitude: 37° 39.9' N ( 37.66500)
USGS Quad: SAN FRANCISO SOUTH Longitude: 122° 22.6' W (-122.37700)
To reach the tidal bench marks from US Route 101 in South San Francisco, proceed
east along Oyster Point Boulevard past the railroad tracks to the intersection
with Marina Boulevard, then turn right on Marina Boulevard and proceed east to
the breakwater at the Oyster Point Marina. The tide gage and staff were located
on the pier extending out into the bay from the boat yard. The bench marks are
along Oyster Point Boulevard, Marina Boulevard and around the marina.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: TIDAL BM 11 1975
DESIGNATION: 941 4392 TIDAL 11
MONUMENTATION: Tidal Station disk VM#: 8108
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete wall OPUS PID:
LATITUDE: 37° 39.9' N ( 37.66500) LONGITUDE: 122° 22.6' W (-122.37700)
The primary bench mark is a disk set in surface of concrete wall surrounding the
sunken stairwell on the west side of the South San Francisco Road and Gun Club
building, inside the chain link fence, 0.24 km (0.15 mi) west of Oyster Point
Marina harbormasters office on Oyster Point Boulevard, 12 m (41 ft) south of NW
corner of building, 5 m (15 ft) south of NW corner of stairwell, and 6 cm (0.2
ft) above ground level.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 6
Station ID: 9414392 PUBLICATION DATE: 10/31/2005
Name: OYSTER POINT MARINA, SAN FRANCISCO BAY
CA
NOAA Chart: 18651 Latitude: 37° 39.9' N ( 37.66500)
USGS Quad: SAN FRANCISO SOUTH Longitude: 122° 22.6' W (-122.37700)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: TIDAL BM 12 1975
DESIGNATION: 941 4392 TIDAL 12
MONUMENTATION: Tidal Station disk VM#: 8109
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete base OPUS PID:
LATITUDE: 37° 39.9' N ( 37.66500) LONGITUDE: 122° 22.6' W (-122.37700)
The bench mark is a disk set in the concrete base of the northwesternmost of ten
loading docks (Door No. 1) along the NW wall of the Landstrom Company Warehouse
(336 Oyster Point Boulevard), 0.56 km (0.35 mi) west of harbormasters office for
the marina, 23 m (76 ft) south of the centerline of Oyster Point Boulevard,
15.39 m (50.5 ft) south of a fire hydrant, and 1.19 m (3.9 ft) above the ground.
BENCH MARK STAMPING: TIDAL BM 13 1975
DESIGNATION: 941 4392 TIDAL 13
MONUMENTATION: Tidal Station disk VM#: 8110
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete curb OPUS PID:
LATITUDE: 37° 39.9' N ( 37.66500) LONGITUDE: 122° 22.6' W (-122.37700)
The bench mark is a disk set in the concrete curb at the foot of the pier
leading to Float A at the marina, 80 m (264 ft) NW of harbormaters office, 21.79
m (71.5 ft) east of centerline of Oyster Point Boulevard, 6.55 m (21.5 ft) NW of
a fire hydrant, 0.3 m (1 ft) SE of the NW edge of the curb, and 0.6 m (2 ft)
above the ground.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 6
Station ID: 9414392 PUBLICATION DATE: 10/31/2005
Name: OYSTER POINT MARINA, SAN FRANCISCO BAY
CA
NOAA Chart: 18651 Latitude: 37° 39.9' N ( 37.66500)
USGS Quad: SAN FRANCISO SOUTH Longitude: 122° 22.6' W (-122.37700)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 14 1982
DESIGNATION: 941 4392 TIDAL 14
MONUMENTATION: Tidal Station disk VM#: 8111
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete walkway OPUS PID:
LATITUDE: 37° 39.9' N ( 37.66500) LONGITUDE: 122° 22.6' W (-122.37700)
The bench mark is a disk set on the north face of the walkway to the new quest
dock in the new expanded Oyster Point Marina, on the most inshore end of the
walkway and on the top face of the concrete support foundation, 123.0 m (403.5
ft) NNW of the center of the traffic circle at Oyster Point Marina, 24.69 m
(81.0 ft) SE of the centerline (at the approach) for dock No. 7, 13.96 m (45.8
ft) ENE of the centerline of the roadway, 12.04 m (39.5 ft) ESE of fire call box
No. 197, 2.59 m (8.5 ft) north of the first light pole along the dock, and 1.40
m (4.6 ft) north of centerline of walkway.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 6
Station ID: 9414392 PUBLICATION DATE: 10/31/2005
Name: OYSTER POINT MARINA, SAN FRANCISCO BAY
CA
NOAA Chart: 18651 Latitude: 37° 39.9' N ( 37.66500)
USGS Quad: SAN FRANCISO SOUTH Longitude: 122° 22.6' W (-122.37700)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: J 571 1939
DESIGNATION: J 571
MONUMENTATION: Bench Mark disk VM#: 8112
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: HT0635
SETTING CLASSIFICATION: Concrete base for semaphore OPUS PID:
LATITUDE: 37° 39.9' N ( 37.66500) LONGITUDE: 122° 23.7' W (-122.39500)
The bench mark is a disk set in the top of the center of the NW edge of the
concrete base of semaphore No. 83, 14.60 m (47.9 ft) west of the north corner of
a large corrugated metal building of the South San Francisco Plant of the
Consolidated Western Steel Corporation, 2.38 m (7.8 ft) SE of the SE rail of the
SE track, and level with the tracks.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 6
Station ID: 9414392 PUBLICATION DATE: 10/31/2005
Name: OYSTER POINT MARINA, SAN FRANCISCO BAY
CA
NOAA Chart: 18651 Latitude: 37° 39.9' N ( 37.66500)
USGS Quad: SAN FRANCISO SOUTH Longitude: 122° 22.6' W (-122.37700)
T I D A L D A T U M S
Tidal datums at OYSTER POINT MARINA, SAN FRANCISCO BAY based on:
LENGTH OF SERIES: 3 MONTHS
TIME PERIOD: May 1979 - July 1979
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 = 2.188
MEAN HIGH WATER MHW = 1.994
MEAN TIDE LEVEL MTL = 1.171
MEAN SEA LEVEL MSL = 1.150
MEAN LOW WATER MLW = 0.348
MEAN LOWER LOW WATER MLLW = 0.000
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
TIDAL BM 11 1975 5.766 3.772
TIDAL BM 12 1975 19.286 17.292
TIDAL BM 13 1975 3.259 1.265
14 1982 2.900 0.906
J 571 1939 4.909 2.915
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 6
Station ID: 9414392 PUBLICATION DATE: 10/31/2005
Name: OYSTER POINT MARINA, SAN FRANCISCO BAY
CA
NOAA Chart: 18651 Latitude: 37° 39.9' N ( 37.66500)
USGS Quad: SAN FRANCISO SOUTH Longitude: 122° 22.6' W (-122.37700)
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.