U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 5
Station ID: 9414767 PUBLICATION DATE: 04/21/2003
Name: ALAMEDA NAS, NAVY FUEL PIER
CA
NOAA Chart: 18649 Latitude: 37° 47.6' N ( 37.79330)
USGS Quad: OAKLAND WEST Longitude: 122° 18.9' W (-122.31500)
To reach the tidal bench marks from Oakland, California, take the Webster Street
tube under the Oakland Inner Harbor channel to Alameda. Once through the tube
turn right onto Atlantic Street and follow it to the gate into Alameda Naval Air
Station (NAS). After passing through the gate continue on Atlantic to 5th
Street and turn right which will curve to the left to become Avenue F. Follow
Avenue F to 3rd Street and turn right, follow 3rd Street to Avenue A, turn left.
Follow Avenue A to Perimeter Road, turn right, follow Perimeter Road 1.3 km
(0.8 mi) to a driveway to the locked gate on the right into the JP 5 storage
area. The NAS Fuel Pier is located behind the JP 5 storage bunker. Call in
advance the Dispatch Office (510) 263-3638 to have someone unlock the gate into
the storage area and the gate to get onto the Fuel Pier. The bench marks are
located along Perimeter Road and in the storage area. The tide gauge and staff
were located on the southeast corner of the NAS Fuel Pier.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 4767 A 1994
DESIGNATION: 941 4767 A
MONUMENTATION: Tidal Station disk VM#: 1
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete footing OPUS PID:
LATITUDE: 37° 47.7' N ( 37.79500) LONGITUDE: 122° 18.9' W (-122.31500)
The bench mark is a disk set flush in top of the concrete footing supporting the
west end of the JP 5 fuel pipe located in the center island of the fuel truck
loading area, 7.92 m (26.0 ft) east of western end of center island, 6.71 m
(22.0 ft) south of the SE corner of Building 375, 0.09 m (0.3 ft) south of
southern edge of the curb around the center island, and 0.06 m (0.2 ft) below
the surrounding grade.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 5
Station ID: 9414767 PUBLICATION DATE: 04/21/2003
Name: ALAMEDA NAS, NAVY FUEL PIER
CA
NOAA Chart: 18649 Latitude: 37° 47.6' N ( 37.79330)
USGS Quad: OAKLAND WEST Longitude: 122° 18.9' W (-122.31500)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 4767 B 1994
DESIGNATION: 941 4767 B
MONUMENTATION: Tidal Station disk VM#: 2
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete box OPUS PID:
LATITUDE: 37° 47.7' N ( 37.79500) LONGITUDE: 122° 18.9' W (-122.31500)
The bench mark is a disk set flush in top of 1.13 m x 1.13 m (3.7 ft x 3.7 ft)
yellow concrete box protecting a storm drain cover south of the JP 5 bunker,
29.08 m (95.4 ft) north of east entrance gate post, 15.14 m (49.7 ft) west of NW
corner of Building 376, 1.62 m ( 5.3 ft) north of 1 m (4 ft) tall vent pipe for
an undergroud tank surrounded by a yellow protective cage, 0.06 m (0.2 ft) north
of south edge of the concrete box, 0.06 m (0.2 ft) west of the east edge of
concrete box, and 0.3 m (1.0 ft) above ground.
BENCH MARK STAMPING: 4767 D 1994
DESIGNATION: 941 4767 D
MONUMENTATION: Tidal Station disk VM#: 3
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete box OPUS PID:
LATITUDE: 37° 47.7' N ( 37.79500) LONGITUDE: 122° 18.9' W (-122.31500)
The bench mark is a disk set flush in the NW corner of a 1 m x 1 m (3 ft x 3 ft)
concrete utility box with a metal cover near entrance to NAV AVN DEPOT FARM
along Perimeter Road, 19.02 m (62.4 ft) east of yellow fire hydrant #331, 7.71 m
(25.3 ft) north of the center line of Perimeter Road, 1.40 m (4.6 ft) SSW of red
fire call box #M-1303162, 0.06 m (0.2 ft) south of the north edge of concrete
box, 0.06 m (0.2 ft) east of the west edge of concrete box, and flush with
ground level.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 5
Station ID: 9414767 PUBLICATION DATE: 04/21/2003
Name: ALAMEDA NAS, NAVY FUEL PIER
CA
NOAA Chart: 18649 Latitude: 37° 47.6' N ( 37.79330)
USGS Quad: OAKLAND WEST Longitude: 122° 18.9' W (-122.31500)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 4767 C 1994
DESIGNATION: 941 4767 C
MONUMENTATION: Tidal Station disk VM#: 4
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete box OPUS PID:
LATITUDE: 37° 47.7' N ( 37.79500) LONGITUDE: 122° 18.9' W (-122.31500)
The bench mark is a disk set flush in a 1 m x 1 m (3 ft x 3 ft) concrete utility
box with a metal cover near the intersection of Perimeter Road and the road
leading to the JP 5 Fuel Pier, 4.88 m (16.0 ft) north of the center line of
Perimeter Road, 1.34 m (4.4 ft) SW of a red fire call box #117, 0.06 m (0.2 ft)
south of the north edge of the concrete box, 0.06 m (0.2 ft) east of the west
edge of the concrete box, and flush with the ground.
BENCH MARK STAMPING: 4767 E 1994
DESIGNATION: 941 4767 E
MONUMENTATION: Tidal Station disk VM#: 5
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete block OPUS PID:
LATITUDE: 37° 47.7' N ( 37.79500) LONGITUDE: 122° 18.9' W (-122.31500)
The bench mark is a disk set flush in concrete in a 1.92 m X 1.55 m (6.3 ft X
5.1 ft) concrete block with "USN SEWER" lid along Perimeter Road east of
Construction Battalion Unit 416 and Building 27, 27.13 m (89.0 ft) east of SE
corner of Building 27, 20.15 m (66.1 ft) south of centerline of Perimeter Road,
1.13 m (3.7 ft) NE of center of SEWER lid, 0.18 m (0.6 ft) south of north edge
of concrete, 0.15 m (0.5 ft) west of east edge of concrete, and 0.12 m (0.4 ft)
above surrounding grade.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 5
Station ID: 9414767 PUBLICATION DATE: 04/21/2003
Name: ALAMEDA NAS, NAVY FUEL PIER
CA
NOAA Chart: 18649 Latitude: 37° 47.6' N ( 37.79330)
USGS Quad: OAKLAND WEST Longitude: 122° 18.9' W (-122.31500)
T I D A L D A T U M S
Tidal datums at ALAMEDA NAS, NAVY FUEL PIER based on:
LENGTH OF SERIES: 1 Month
TIME PERIOD: August 1994 - August 1994
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 = 1.952
MEAN HIGH WATER MHW = 1.763
MEAN TIDE LEVEL MTL = 1.055
MEAN SEA LEVEL MSL = 1.028
MEAN LOW WATER MLW = 0.347
MEAN LOWER LOW WATER MLLW = 0.000
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
4767 A 1994 2.833 1.070
4767 B 1994 2.768 1.005
4767 D 1994 2.759 0.996
4767 C 1994 2.933 1.170
4767 E 1994 2.943 1.180
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 5
Station ID: 9414767 PUBLICATION DATE: 04/21/2003
Name: ALAMEDA NAS, NAVY FUEL PIER
CA
NOAA Chart: 18649 Latitude: 37° 47.6' N ( 37.79330)
USGS Quad: OAKLAND WEST Longitude: 122° 18.9' W (-122.31500)
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.