U.S. DEPARTMENT OF COMMERCE
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National Ocean Service
Datums Page Page 1 of 7
Station ID: 9414849 PUBLICATION DATE: 04/21/2003
Name: RICHMOND INNER HARBOR,S.F.BAY
CA
NOAA Chart: 18653 Latitude: 37° 54.6' N ( 37.91000)
USGS Quad: RICHMOND Longitude: 122° 21.5' W (-122.35800)
To reach the bench marks from Richmond, CA, proceed north on I-580 to the
Harbour Way South exit, turn right on Cutting Street, follow the Richmond
Terminals 2 & 3 signs. Turn right onto Harbour Way South and continue south to
the end of the road. Proceed through the first gate and into the inner yard
occupied by MAAS boats. The bench marks were in the vicinity and the tide gauge
was on the east end of the dock directly south of MAAS boats.
T I D A L B E N C H M A R K S
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 7
Station ID: 9414849 PUBLICATION DATE: 04/21/2003
Name: RICHMOND INNER HARBOR,S.F.BAY
CA
NOAA Chart: 18653 Latitude: 37° 54.6' N ( 37.91000)
USGS Quad: RICHMOND Longitude: 122° 21.5' W (-122.35800)
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: BM 1 1932
DESIGNATION: TIDAL 1 STA III 22
MONUMENTATION: Tidal Station disk VM#: 8446
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: HT0923
SETTING CLASSIFICATION: Concrete foundation OPUS PID:
LATITUDE: 37° 54.6' N ( 37.91000) LONGITUDE: 122° 21.5' W (-122.35800)
The primary bench mark is a disk set flush in the top of the SE concrete footing
which was used to support a water tower near the SE corner of the Old Ford
plant, 29 m (96 ft) east of the SE corner of the oil house, 18 m (58 ft) north
of the end of the grade at the shoreline, 0.64 m (2.1 ft) south of the center of
the SE footing, and 1.31 m (4.3 ft) above grade.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 7
Station ID: 9414849 PUBLICATION DATE: 04/21/2003
Name: RICHMOND INNER HARBOR,S.F.BAY
CA
NOAA Chart: 18653 Latitude: 37° 54.6' N ( 37.91000)
USGS Quad: RICHMOND Longitude: 122° 21.5' W (-122.35800)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING:
DESIGNATION: 941 4849 FORD
ALIAS: NO STAMPING 1
MONUMENTATION: Pipe Cap VM#: 69
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: HT0924
SETTING CLASSIFICATION: Metal pipe OPUS PID:
LATITUDE: 37° 54.6' N ( 37.91000) LONGITUDE: 122° 21.4' W (-122.35700)
The bench mark is a 8 cm (0.25 ft) brass pipe cap, set in concrete on the fence
line (fence removed except at the shore) on the east property line of the old
Ford plant, 160 m (525 ft) east of the water tank footings, 17 m (55 ft) north
of the end of the grade at the shoreline, 10.39 m (34.1 ft) north of the iron
fence post at the top of the fill where the fence bends down towards the shore,
and fastened to the top of an iron pipe set in concrete 0.06 m (0.2 ft) below
the surface.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 7
Station ID: 9414849 PUBLICATION DATE: 04/21/2003
Name: RICHMOND INNER HARBOR,S.F.BAY
CA
NOAA Chart: 18653 Latitude: 37° 54.6' N ( 37.91000)
USGS Quad: RICHMOND Longitude: 122° 21.5' W (-122.35800)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: BM 2 1932
DESIGNATION: TIDAL 2 STA III 22
MONUMENTATION: Tidal Station disk VM#: 8447
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: HT0920
SETTING CLASSIFICATION: Granite foundation OPUS PID:
LATITUDE: 37° 54.6' N ( 37.91000) LONGITUDE: 122° 21.5' W (-122.35800)
The bench mark is a disk set vertically in the granite foundation at the
northern most entrance on the west side of the old Ford plant, 6.13 m (20.1 ft)
north of a 1 m (3 ft) tall red fire main valve next to the west wall of the
building, 3.87 m (12.7 ft) south of the northern most entrance on the west side
of the building, and 0.15 m (0.5 ft) above ground.
BENCH MARK STAMPING: LS 2769
DESIGNATION: 941 4849 LS 2769
MONUMENTATION: Bench Mark disk VM#: 8449
AGENCY: City of Richmond IDB PID#:
SETTING CLASSIFICATION: Pavement OPUS PID:
LATITUDE: 37° 54.6' N ( 37.91000) LONGITUDE: 122° 21.5' W (-122.35800)
The bench mark is a disk set beneath a 0.23 m (0.8 ft) steel monument cover near
the centerline of Harbor Way South, just north of the fence at the south end of
the street, 27 m (87 ft) west of the west wall of the old Ford plant, 16 m (53
ft) WNW of bench mark 941 4849 GATE, 10.36 m (34.0 ft) east of the west edge of
the street, 4 m (13 ft) north of the chain link fence at the south end of Harbor
Way South, and 0.3 m (1 ft) below the street.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 7
Station ID: 9414849 PUBLICATION DATE: 04/21/2003
Name: RICHMOND INNER HARBOR,S.F.BAY
CA
NOAA Chart: 18653 Latitude: 37° 54.6' N ( 37.91000)
USGS Quad: RICHMOND Longitude: 122° 21.5' W (-122.35800)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING:
DESIGNATION: 941 4849 GATE
ALIAS: NO STAMPING 2
MONUMENTATION: Pipe Cap VM#: 8450
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: HT0921
SETTING CLASSIFICATION: Concrete foundation OPUS PID:
LATITUDE: 37° 54.6' N ( 37.91000) LONGITUDE: 122° 21.5' W (-122.35800)
The bench mark is a 8 cm (0.25 ft) brass pipe cap, set in the concrete footing
of the first fence post east of the gate of the old Ford plant at the south end
of Harbour Way South, 16 m (53 ft) east of bench mark LS 2769, 2.44 m (8.0 ft)
east of the west edge of the sidewalk, 0.03 m (0.1 ft) north of the chain link
fence across the end of Harbour Way South, and 0.06 m (0.2 ft) above grade.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 7
Station ID: 9414849 PUBLICATION DATE: 04/21/2003
Name: RICHMOND INNER HARBOR,S.F.BAY
CA
NOAA Chart: 18653 Latitude: 37° 54.6' N ( 37.91000)
USGS Quad: RICHMOND Longitude: 122° 21.5' W (-122.35800)
T I D A L D A T U M S
Tidal datums at RICHMOND INNER HARBOR,S.F.BAY based on:
LENGTH OF SERIES: 3 Months
TIME PERIOD: November 1994 - January 1995
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 = 1.841
MEAN HIGH WATER MHW = 1.652
MEAN TIDE LEVEL MTL = 0.997
MEAN SEA LEVEL MSL = 0.990
MEAN LOW WATER MLW = 0.342
North American Vertical Datum NAVD88 = 0.002
MEAN LOWER LOW WATER MLLW = 0.000
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
BM 1 1932 5.068 3.416
941 4849 FORD 4.552 2.900
BM 2 1932 4.902 3.250
LS 2769 4.228 2.576
941 4849 GATE 4.394 2.742
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 7 of 7
Station ID: 9414849 PUBLICATION DATE: 04/21/2003
Name: RICHMOND INNER HARBOR,S.F.BAY
CA
NOAA Chart: 18653 Latitude: 37° 54.6' N ( 37.91000)
USGS Quad: RICHMOND Longitude: 122° 21.5' W (-122.35800)
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.