U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 6
Station ID: 9414819 PUBLICATION DATE: 04/01/2004
Name: SAUSALITO, COE DOCK, S.F. BAY
CA
NOAA Chart: 18649 Latitude: 37° 51.9' N ( 37.86500)
USGS Quad: SAN FRANCISCO NORTH Longitude: 122° 29.6' W (-122.49300)
To reach the tidal bench marks in Sausalito, proceed east along Bridgeway Street
and then along Marinship Way to the U.S. Army Corps of Engineers (COE) San
Francisco Bay Model building facilities. The bench marks are along Bridgeway
and east of the Corps of Engineers soil lab building. The tide gage and staff
were on the east side of the inshore portion of the Corps of Engineers dock.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: SAUSALITO NO 2 1917
DESIGNATION: 941 4819 TIDAL 2
MONUMENTATION: Tidal Station disk VM#: 8431
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: HT1070
SETTING CLASSIFICATION: Building brick face OPUS PID:
LATITUDE: 37° 51.6' N ( 37.86000) LONGITUDE: 122° 29.1' W (-122.48500)
The primary bench mark is a disk set vertically in the NW brick face of the
Caledonia Market building located at the east corner of the intersection of Pine
and Caledonia Streets, 1.83 m (6.0 ft) NE of the west corner of the building,
and 0.30 m (1.0 ft) above the sidewalk.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 6
Station ID: 9414819 PUBLICATION DATE: 04/01/2004
Name: SAUSALITO, COE DOCK, S.F. BAY
CA
NOAA Chart: 18649 Latitude: 37° 51.9' N ( 37.86500)
USGS Quad: SAN FRANCISCO NORTH Longitude: 122° 29.6' W (-122.49300)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 32 1948
DESIGNATION: 941 4819 TIDAL 32
MONUMENTATION: Tidal Station disk VM#: 8432
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: HT1067
SETTING CLASSIFICATION: Concrete slab OPUS PID:
LATITUDE: 37° 51.8' N ( 37.86330) LONGITUDE: 122° 29.6' W (-122.49300)
The bench mark is a disk set in top of the south corner of a concrete slab,
12.13 m (39.8 ft) SE of the south corner of the laboratory storage building,
11.13 m (36.5 ft) NE of the east corner of a chain link fence at the Corps of
Engineers laboratory yard, 4 m (14 ft) NW of the projected centerline of the
road, 3.51 m (11.5 ft) NE of the NE rail of a spur track, and 0.15 m (0.5 ft)
north of the south corner of the slab.
BENCH MARK STAMPING: 33 1948
DESIGNATION: 941 4819 TIDAL 33
MONUMENTATION: Tidal Station disk VM#: 8433
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: HT1066
SETTING CLASSIFICATION: Concrete slab OPUS PID:
LATITUDE: 37° 51.8' N ( 37.86330) LONGITUDE: 122° 29.6' W (-122.49300)
The bench mark is a disk set in top of a concrete slab located at the center of
an asphalt road at the crossing of a spur track, 18.47 m (60.6 ft) south of
bench mark 32 1948, 13.41 m (44.0 ft) SE of the SE rail of a spur track, 10.58 m
(34.7 ft) south of the east fence corner of a chain link fence at the Corps of
Engineers laboratory yard, and 9.14 m (30.0 ft) NW of the fence line.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 6
Station ID: 9414819 PUBLICATION DATE: 04/01/2004
Name: SAUSALITO, COE DOCK, S.F. BAY
CA
NOAA Chart: 18649 Latitude: 37° 51.9' N ( 37.86500)
USGS Quad: SAN FRANCISCO NORTH Longitude: 122° 29.6' W (-122.49300)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: LS 3221
DESIGNATION: LS 3221 A
ALIAS: 4819 C
MONUMENTATION: Survey disk VM#: 8434
AGENCY: City of Sausalito IDB PID#: HT3535
SETTING CLASSIFICATION: Concrete monument OPUS PID:
LATITUDE: 37° 51.7' N ( 37.86170) LONGITUDE: 122° 29.4' W (-122.49000)
The bench mark is a disk set in a concrete monument located in the center of the
intersection of Napa Street and Bridgeway Avenue, under an iron cover marked
MONUMENT, 4.60 m (15.1 ft) Ne of the center of the southbound lanes of Bridgeway
Boulevard, and 0.30 m (1.0 ft) below the pavement.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 6
Station ID: 9414819 PUBLICATION DATE: 04/01/2004
Name: SAUSALITO, COE DOCK, S.F. BAY
CA
NOAA Chart: 18649 Latitude: 37° 51.9' N ( 37.86500)
USGS Quad: SAN FRANCISCO NORTH Longitude: 122° 29.6' W (-122.49300)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: LS 3221
DESIGNATION: LS 3221
ALIAS: 4819 D
MONUMENTATION: Survey disk VM#: 8435
AGENCY: City of Sausalito IDB PID#: HT3536
SETTING CLASSIFICATION: Concrete monument OPUS PID:
LATITUDE: 37° 51.6' N ( 37.86000) LONGITUDE: 122° 29.2' W (-122.48700)
The bench mark is a disk set in a concrete monument located in the center of the
intersection of Litho Street and Bridgeway Boulevard, under an iron cover marked
MONUMENT, 4.79 m (15.7 ft) NE of the center of the southbound lanes of the
Boulevard, and 0.30 m (1.0 ft) below the pavement.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 6
Station ID: 9414819 PUBLICATION DATE: 04/01/2004
Name: SAUSALITO, COE DOCK, S.F. BAY
CA
NOAA Chart: 18649 Latitude: 37° 51.9' N ( 37.86500)
USGS Quad: SAN FRANCISCO NORTH Longitude: 122° 29.6' W (-122.49300)
T I D A L D A T U M S
Tidal datums at SAUSALITO, COE DOCK, S.F. BAY based on:
LENGTH OF SERIES: 8 MONTHS
TIME PERIOD: September 1978 - April 1979
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION: 9414290 SAN FRANCISCO, SAN FRANCISCO BAY
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
MEAN HIGHER HIGH WATER MHHW = 1.749
MEAN HIGH WATER MHW = 1.566
MEAN TIDE LEVEL MTL = 0.955
MEAN SEA LEVEL MSL = 0.944
MEAN LOW WATER MLW = 0.344
MEAN LOWER LOW WATER MLLW = 0.000
North American Vertical Datum NAVD88 = -0.052
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
SAUSALITO NO 2 1917 4.942 3.376
32 1948 3.516 1.950
33 1948 3.486 1.920
LS 3221 3.626 2.060
LS 3221 2.613 1.047
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 6
Station ID: 9414819 PUBLICATION DATE: 04/01/2004
Name: SAUSALITO, COE DOCK, S.F. BAY
CA
NOAA Chart: 18649 Latitude: 37° 51.9' N ( 37.86500)
USGS Quad: SAN FRANCISCO NORTH Longitude: 122° 29.6' W (-122.49300)
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.