U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 8
Station ID: 9414863 PUBLICATION DATE: 11/25/2020
Name: RICHMOND, CHEVRON OIL PIER
CA
NOAA Chart: 18653 Latitude: 37° 55.4' N ( 37.92300)
USGS Quad: SAN QUENTIN Longitude: 122° 24.6' W (-122.40958)
To reach the tidal bench marks proceed to the Castro Street/Pt. Richmond exit
13B from I-580 west, turn left onto Castro St, right on to Chevron Way (just
before the I-580 underpass), proceed through the main gate to the first stop
sign (access must be arranged in advance by calling the Wharf Master at (510)
242-4388), then turn left onto Schofield St. and continue 1.0 km (0.6 mi) to
paved Chevron Long Wharf causeway. The bench marks are along the road on
causeway of the main fuel pier. The tide gage is located in room south of the
lab.
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 8
Station ID: 9414863 PUBLICATION DATE: 11/25/2020
Name: RICHMOND, CHEVRON OIL PIER
CA
NOAA Chart: 18653 Latitude: 37° 55.4' N ( 37.92300)
USGS Quad: SAN QUENTIN Longitude: 122° 24.6' W (-122.40958)
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 3 1934
DESIGNATION: TIDAL 3 STA III 23
MONUMENTATION: Bench Mark disk VM#: 8453
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: HT0940
SETTING CLASSIFICATION: Concrete block OPUS PID:
LATITUDE: 37° 55.7' N ( 37.92769) LONGITUDE: 122° 24.0' W (-122.40081)
The primary bench mark is a disk set flush in the top of the west side of a
large octagonal concrete structure at the seaward end of the rip rap pipeline
jetty on the NW side of the paved causeway, 6.55 m (21.5 ft) NW of the edge of
the causeway, 1.37 m (4.5 ft) SW of the SW edge of a wooden footbridge between
the pipelines and concrete bridge leading to a wharf, and 1.00 m (3.3 ft) below
the causeway deck.
BENCH MARK STAMPING: 4863 E 1979
DESIGNATION: 941 4863 E
MONUMENTATION: Tidal Station disk VM#: 8456
AGENCY: National Ocean Survey (NOS) IDB PID:
SETTING CLASSIFICATION: Rock outcrop OPUS PID:
LATITUDE: 37° 55.8' N ( 37.93006) LONGITUDE: 122° 23.9' W (-122.39881)
The bench mark is set vertically in a shale outcropping at the NE corner of the
transformer yard, 47.00 m (154.2 ft) east of the NE corner of the B544 buck
transformer building, 6.00 m (19.7 ft) north of a fence line, 3.99 m (13.1 ft)
north of the center of a gate leading to the beach, and 1.10 m (3.6 ft) above
the ground.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 8
Station ID: 9414863 PUBLICATION DATE: 11/25/2020
Name: RICHMOND, CHEVRON OIL PIER
CA
NOAA Chart: 18653 Latitude: 37° 55.4' N ( 37.92300)
USGS Quad: SAN QUENTIN Longitude: 122° 24.6' W (-122.40958)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 4863 G 1995
DESIGNATION: 941 4863 G
MONUMENTATION: Tidal Station disk VM#: 12902
AGENCY: National Ocean Service (NOS) IDB PID:
SETTING CLASSIFICATION: Concrete curb OPUS PID:
LATITUDE: 37° 55.5' N ( 37.92444) LONGITUDE: 122° 24.4' W (-122.40628)
The bench mark is set in a concrete curb along the SE side of Chevron Long Wharf
causeway, 4.11 m (13.5 ft) SE of center of causeway, 0.78 m (2.6 ft) west of
light pole C20, 0.40 m (1.3 ft) above road, and 0.12 m (0.4 ft) NW of SE side of
pier face. Note: The bench mark is located north of number 105 painted on
curb.
BENCH MARK STAMPING: 4863 H 1995
DESIGNATION: 941 4863 H
MONUMENTATION: Tidal Station disk VM#: 12903
AGENCY: National Ocean Service (NOS) IDB PID:
SETTING CLASSIFICATION: Concrete curb OPUS PID:
LATITUDE: 37° 55.6' N ( 37.92644) LONGITUDE: 122° 24.2' W (-122.40383)
The bench mark is set in a concrete curb along the Chevron Long Wharf causeway,
18.25 m (59.9 ft) SW of light pole C14, 4.00 m (13.1 ft) SE of center of the
causeway,and 0.09 m (0.3 ft) NW of SE side of pier face. Note: The bench mark
is located above number 60 painted on curb.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 8
Station ID: 9414863 PUBLICATION DATE: 11/25/2020
Name: RICHMOND, CHEVRON OIL PIER
CA
NOAA Chart: 18653 Latitude: 37° 55.4' N ( 37.92300)
USGS Quad: SAN QUENTIN Longitude: 122° 24.6' W (-122.40958)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 4863 J 1998
DESIGNATION: 941 4863 J
MONUMENTATION: Tidal Station disk VM#: 15029
AGENCY: National Ocean Service (NOS) IDB PID:
SETTING CLASSIFICATION: Concrete foundation OPUS PID:
LATITUDE: 37° 55.9' N ( 37.93172) LONGITUDE: 122° 24.0' W (-122.39975)
The bench mark is set in concrete base of a tower # 758 supporting power lines
and pipes near the intersection of Schofield and Hill Road located near the long
wharf at the Chevron Oil Refinery in Richmond, 16.60 m (54.5 ft) NE of power
pole # 759, 6.00 m (19.7 ft) north of the middle of Schofield Road, 1.30 m (4.3
ft) NE of SE edge of concrete base, and 0.15 m (0.5 ft) north of south edge of
base.
BENCH MARK STAMPING: 4863 K 1998
DESIGNATION: 941 4863 K
MONUMENTATION: Tidal Station disk VM#: 15030
AGENCY: National Ocean Service (NOS) IDB PID:
SETTING CLASSIFICATION: Concrete block OPUS PID:
LATITUDE: 37° 56.0' N ( 37.93283) LONGITUDE: 122° 23.8' W (-122.39744)
The bench mark is set in a yellow 1.2 m x 1.5 m x 1.5 m (4 ft x 5 ft x 5 ft)
concrete block situated over a pipe on the east side of Schofield Road just
before the overpass and the Long Wharf of the Chevron Oil Refinery in Richmond,
18.30 m (60.0 ft) south of power pole # 736, 4.91 m (16.1 ft) east of the center
of the road, and 1.00 m (3.3 ft) north of north end of guard rail on east side
of road.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 8
Station ID: 9414863 PUBLICATION DATE: 11/25/2020
Name: RICHMOND, CHEVRON OIL PIER
CA
NOAA Chart: 18653 Latitude: 37° 55.4' N ( 37.92300)
USGS Quad: SAN QUENTIN Longitude: 122° 24.6' W (-122.40958)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 4863 N 2008
DESIGNATION: 941 4863 N
MONUMENTATION: Tidal Station disk VM#: 18981
AGENCY: National Ocean Service (NOS) IDB PID:
SETTING CLASSIFICATION: Stainless steel rod OPUS PID:
LATITUDE: 37° 55.9' N ( 37.93117) LONGITUDE: 122° 24.0' W (-122.39931)
The bench mark is located along Causeway Road, 14.30 m (47 ft) NW from utility
pole #760, 12.80 m (42 ft) north of the center of a 3 ft. diameter culvert pipe
angled into the ground, and 0.70 m (2.2 ft) south of a height clearance road
sign labeled "14'-11". The datum point is the top of a stainless steel rod
driven 2.1 m (7 ft) to refusal.
BENCH MARK STAMPING: 4863 M 2008
DESIGNATION: 941 4863 M
MONUMENTATION: Tidal Station disk VM#: 18982
AGENCY: National Ocean Service (NOS) IDB PID:
SETTING CLASSIFICATION: Stainless steel rod OPUS PID#: BBBN57
LATITUDE: 37° 55.8' N ( 37.93033) LONGITUDE: 122° 24.0' W (-122.39947)
The bench mark is located along Causeway Road, 41.00 m (134.5 ft) SW of utility
pole #765, 12 m (40 ft) south from an old "looking well" #408AT, and 8.25 m (27
ft) east of the center of Causeway Road. The datum point is the top of a
stainless steel rod driven 2.7 m (9 ft) to refusal.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 8
Station ID: 9414863 PUBLICATION DATE: 11/25/2020
Name: RICHMOND, CHEVRON OIL PIER
CA
NOAA Chart: 18653 Latitude: 37° 55.4' N ( 37.92300)
USGS Quad: SAN QUENTIN Longitude: 122° 24.6' W (-122.40958)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 4863 P
DESIGNATION: 941 4863 P
ALIAS: 4863 P
MONUMENTATION: Tidal Station disk VM#: 20941
AGENCY: National Ocean Service (NOS) IDB PID:
SETTING CLASSIFICATION: Conc bridge fndn OPUS PID:
LATITUDE: 37° 55.8' N ( 37.92939) LONGITUDE: 122° 24.0' W (-122.39975)
The bench mark is disk set flush in the S side of a massive concrete foundation
seawall of bridge number 176, 21.6 m (70.9 ft) NW of the center of Long Wharf
entrance gate, 14.3 m (46.9 ft) SE of the round concrete foundation for a light
and camera pole, 2.1 m (6.9 ft) SW of the center of the entrance of bridge
number 176.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 7 of 8
Station ID: 9414863 PUBLICATION DATE: 11/25/2020
Name: RICHMOND, CHEVRON OIL PIER
CA
NOAA Chart: 18653 Latitude: 37° 55.4' N ( 37.92300)
USGS Quad: SAN QUENTIN Longitude: 122° 24.6' W (-122.40958)
T I D A L D A T U M S
Tidal datums at RICHMOND, CHEVRON OIL PIER based on:
LENGTH OF SERIES: 22 YEARS
TIME PERIOD: October 1995 - September 2019
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:
HIGHEST OBSERVED WATER LEVEL (02/06/1998) = 2.630
MEAN HIGHER HIGH WATER MHHW = 1.841
MEAN HIGH WATER MHW = 1.656
MEAN TIDE LEVEL MTL = 0.999
MEAN SEA LEVEL MSL = 0.991
MEAN LOW WATER MLW = 0.342
MEAN LOWER LOW WATER MLLW = 0.000
North American Vertical Datum NAVD88 = -0.005
LOWEST OBSERVED WATER LEVEL (01/11/2009) = -0.771
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
3 1934 2.843 1.187
4863 E 1979 5.084 3.428
4863 G 1995 4.150 2.494
4863 H 1995 4.146 2.490
4863 J 1998 10.814 9.158
4863 K 1998 15.362 13.706
4863 N 2008 8.682 7.026
4863 M 2008 5.090 3.434
4863 P 2.870 1.214
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 8 of 8
Station ID: 9414863 PUBLICATION DATE: 11/25/2020
Name: RICHMOND, CHEVRON OIL PIER
CA
NOAA Chart: 18653 Latitude: 37° 55.4' N ( 37.92300)
USGS Quad: SAN QUENTIN Longitude: 122° 24.6' W (-122.40958)
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.