U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 5
PUBLICATION DATE: 06/30/1982
Station ID: 9414816 SUPERCEDED DATE: 04/21/2003
Name: BERKELEY, SAN FRANCISCO BAY
CALIFORNIA
NOAA Chart: 18649 Latitude: 37° 51.8' N
USGS Quad: OAKLANDWEST Longitude: 122° 18.7' W
To reach the tidal bench marks proceed north along Highway 17/80 (Eastshore
Highway), exit at University Avenue, west to Marina Boulevard (0.5 mile west of
freeway), then 100 feet (30.5 m) beyond Marina Boulevard, turn south into dirt
parking area. Tide tide gage and staff were located on seawall between two boat
houses at the City of Berkeley Marina, South Basin.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: UNSTAMPED 1
MONUMENTATION: Survey Disk VM#: 8419
AGENCY: PID:
SETTING CLASSIFICATION: Concrete
The bench mark is a City of Berkeley bronze pin, set on street below monument
covered marked City Monument, near intersection of University Avenue and
entrance to Angel Island, Tiburon Ferry Dock, 750 feet (229 m) east of first
lamp post west of intersection, 39.8 feet (12.1 m) south of University Avenue
centerline and projected centerline of Angel Dock Entrance, 5.8 feet (1.8 m)
southeast of centerline of University Avenue, and 0.5 foot (0.2 m) below cover.
BENCH MARK STAMPING: UNSTAMPED 2
MONUMENTATION: Survey Disk VM#: 8420
AGENCY: PID:
SETTING CLASSIFICATION: Concrete
The bench mark is a City of Berkeley bronze pin, set on street below monument
cover marked City Monument, at T intersection of University Avneue and Marina
Boulevard, 875 feet (267 m) northeast of sign marking entrance of Berkeley
Marina, 35 feet (11 m) south of lamp post at beginning of Marina Boulevard, 25
feet (7.6 m) east of sidewalk curb, and 0.5 foot (0.2 m) below cover.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 5
PUBLICATION DATE: 06/30/1982
Station ID: 9414816 SUPERCEDED DATE: 04/21/2003
Name: BERKELEY, SAN FRANCISCO BAY
CALIFORNIA
NOAA Chart: 18649 Latitude: 37° 51.8' N
USGS Quad: OAKLANDWEST Longitude: 122° 18.7' W
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: UNSTAMPED 3
MONUMENTATION: Survey Disk VM#: 8421
AGENCY: PID:
SETTING CLASSIFICATION: Concrete
The bench mark is a City of Berkeley bronze cap, set in street below monument
covered marked City Monument, on centerline of Seawall Drive and projected
centerline of two way portion of University Avenue, 125 feet (38.1 m) east of
intersection of Berkeley pier with shore, 50 feet (15 m) south of a lightpole,
and 0.5 foot (0.2 m) below level of street.
BENCH MARK STAMPING: UNSTAMPED 4
MONUMENTATION: Survey Disk VM#: 8422
AGENCY: PID#: HT2935
SETTING CLASSIFICATION: Concrete
The bench mark is a bronze pin set below ground and covered by square metal
cover, at southern corner of Berkeley Marina in asphalt covered area, 42 feet
(13 m) south of a light post, 10 feet (3.0 m) east of two electrical circuit
boxes, 2.5 feet (0.8 m) southwest of fire hydrant, and 2 feet (0.6 m) below
ground.
BENCH MARK STAMPING: 10 1947
MONUMENTATION: Survey Disk VM#: 8423
AGENCY: PID#: HT0987
SETTING CLASSIFICATION: Concrete
The bench mark is set in top of northeast corner of concrete base of center
support of viaduct, at southeast edge of street, at intersection of Second
Street, under University Avenue vaiduct, 528 feet (161 m) southwest of Southern
Pacific Company railroad station, and 0.9 foot (0.3 m) above street.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 5
PUBLICATION DATE: 06/30/1982
Station ID: 9414816 SUPERCEDED DATE: 04/21/2003
Name: BERKELEY, SAN FRANCISCO BAY
CALIFORNIA
NOAA Chart: 18649 Latitude: 37° 51.8' N
USGS Quad: OAKLANDWEST Longitude: 122° 18.7' W
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: C 558
MONUMENTATION: Survey Disk VM#: 8424
AGENCY: PID#: HT0985
SETTING CLASSIFICATION: Concrete
The bench mark is set in top of northwest corner of north one of two concrete
bases of concrete column supporting University Avenue vaiduct, 150 feet (45.7 m)
northeast of Southern Pacific Company railroad station, 106.5 feet (32.5 m) east
of centerline of Third Street, and 1.0 foot (0.3 m) above asphalt parking lot.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 5
PUBLICATION DATE: 06/30/1982
Station ID: 9414816 SUPERCEDED DATE: 04/21/2003
Name: BERKELEY, SAN FRANCISCO BAY
CALIFORNIA
NOAA Chart: 18649 Latitude: 37° 51.8' N
USGS Quad: OAKLANDWEST Longitude: 122° 18.7' W
T I D A L D A T U M S
Tidal datums at BERKELEY, SAN FRANCISCO BAY based on:
LENGTH OF SERIES: 6 MONTHS
TIME PERIOD: MARCH - AUGUST 1979
TIDAL EPOCH: 1960-1978
CONTROL TIDE STATION: 9414290 SAN FRANCISCO
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in FEET:
MEAN HIGHER HIGH WATER MHHW = 6.17
MEAN HIGH WATER MHW = 5.58
MEAN TIDE LEVEL MTL = 3.35
* NATIONAL GEODETIC VERTICAL DATUM NGVD29 = 2.86
MEAN LOW WATER MLW = 1.13
MEAN LOWER LOW WATER MLLW = 0.00
* NGVD reference based on adjustment of 1956 and NOS levels of1979.
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In FEET above:
Stamping or Designation MLLW MHW
UNSTAMPED 1 12.14 6.56
UNSTAMPED 2 10.96 5.38
UNSTAMPED 3 14.48 8.90
UNSTAMPED 4 11.22 5.64
10 1947 12.36 6.78
C 558 17.17 11.59
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 5
PUBLICATION DATE: 06/30/1982
Station ID: 9414816 SUPERCEDED DATE: 04/21/2003
Name: BERKELEY, SAN FRANCISCO BAY
CALIFORNIA
NOAA Chart: 18649 Latitude: 37° 51.8' N
USGS Quad: OAKLANDWEST Longitude: 122° 18.7' W
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 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.