U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 6
PUBLICATION DATE: 12/10/1984
Station ID: 9411065 SUPERCEDED DATE: 04/21/2003
Name: PORT HUENEME
CALIFORNIA
NOAA Chart: 18725 Latitude: 34° 8.9' N
USGS Quad: OXNARD Longitude: 119° 12.2' W
To reach the tidal bench marks proceed to the vicinity of harbor area of Port
Hueneme to Market Street, Pearl Street, Ventura Street, Sam Pidco and Main
Streets and the tide gage and staff were located on Wharf NO 1, South Side Slip
A.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 6 RESET 1970
MONUMENTATION: Survey Disk VM#: 8036
AGENCY: PID#: EW6069
SETTING CLASSIFICATION: Retaining Wall
The bench mark is cemented in a drill hole flush with the top of a 2 foot (0.6
m) wide concrete retaining wall that projects 1.5 feet (0.5 m) above ground, at
the entrance guardgate to the U.S. Naval Construction Battalion Center, 14.5
feet (4.4 m) north of the north wall of the guard house, and 1.5 feet (0.5 m)
west of a light standard.
BENCH MARK STAMPING: BM 3 1932
MONUMENTATION: Survey Disk VM#: 8035
AGENCY: PID#: EW6082
SETTING CLASSIFICATION: Concrete Wall
The bench mark is set vertically in south concrete wall of Port Hueneme Branch
of Security National Bank of Los Angela building at the east side of the
intersection of East Broad and South Market Street, 8.0 feet (2.4 m) south of
the west jamb of the west door of building entrance, 0.5 foot (0.2 m) east of
the SW corner of the building, and 2.0 feet (0.6 m) above ground level.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 6
PUBLICATION DATE: 12/10/1984
Station ID: 9411065 SUPERCEDED DATE: 04/21/2003
Name: PORT HUENEME
CALIFORNIA
NOAA Chart: 18725 Latitude: 34° 8.9' N
USGS Quad: OXNARD Longitude: 119° 12.2' W
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: NO 8 1949
MONUMENTATION: Survey Disk VM#: 8037
AGENCY: PID#: EW6085
SETTING CLASSIFICATION: Wall
The bench mark is set flush with and in the centerline of top surface of a
garden wall parallel to the south side of Hueneme Grammar School building at the
intersection of Pearl and Third Streets, 40.5 feet (12.3 m) north of the north
edge of the curb of Pearl Street, 37.5 feet (11.4 m) south of the portico of the
school building, 7.5 feet (2.3 m) from the western end of a 1.5 feet (0,5 m)
wide by 4.0 feet (1.2 m) high by 60 feet (18 m) long wall, and 4.0 feet (1.2 m)
above ground.
BENCH MARK STAMPING: NO 9 1949
MONUMENTATION: Survey Disk VM#: 8038
AGENCY: PID#: EW6086
SETTING CLASSIFICATION: Cement Base
The bench mark is set flush at ground level in the cement base of a flagpole on
the lawn of Ventura Country Fire Station, at the NE corner of the intersection
of Ventura and Pearl Streets, 19.5 feet (5.9 m) east of Ventura Street, and 11.0
feet (3.4 m) SW of the nearest corner of the fire house.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 6
PUBLICATION DATE: 12/10/1984
Station ID: 9411065 SUPERCEDED DATE: 04/21/2003
Name: PORT HUENEME
CALIFORNIA
NOAA Chart: 18725 Latitude: 34° 8.9' N
USGS Quad: OXNARD Longitude: 119° 12.2' W
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 8 LA
MONUMENTATION: Survey Disk VM#: 8039
AGENCY: PID#: EW6080
SETTING CLASSIFICATION: Concrete Block
The bench mark is set flush with the ground in top of the west side of a 3 foot
(1 m) square concrete block supporting the SW leg of the Steel Foundation of the
city water tank at the NE corner of San Pedro and Main Streets, 16.5 feet (4.9
m) east of the east curb of San Pedro Street, and 0.2 foot (0.1 m) below the
surface of the concrete in a 0.3 foot (0.1 m) pipe.
BENCH MARK STAMPING: JAD RE 224
MONUMENTATION: Survey Disk VM#: 8040
AGENCY: PID:
SETTING CLASSIFICATION: Concrete Port
The bench mark is set in a wood plug, in the center of a 2 foot (0.6 m) concrete
port, 119.0 feet (36.3 m) NW of the center line of the light station entrance
road, 44.5 feet (13.6 m) SE of the SE rail of the railroad track, 42.0 feet
(12.8 m) south of the centerline of Maritime Road, and 2.0 feet (0.6 m) south of
the NW corner of waven steel wire fence at the U.S. Coast Guard Point Hueneme
light house at the SE corner of the intersection of Port and Maritime Roads.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 6
PUBLICATION DATE: 12/10/1984
Station ID: 9411065 SUPERCEDED DATE: 04/21/2003
Name: PORT HUENEME
CALIFORNIA
NOAA Chart: 18725 Latitude: 34° 8.9' N
USGS Quad: OXNARD Longitude: 119° 12.2' W
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: LIGHT 1921
MONUMENTATION: Survey Disk VM#: 8041
AGENCY: PID#: EW6079
SETTING CLASSIFICATION: Concrete Post
The bench mark is on the ground of the U.S Coast Guard Point Hueneme light
station, 92.0 feet (28.0 m) south of the south corner of the lighthouse keepers
Stucco cottage with tile roof (building 2-59), 89.0 feet (27.1 m) NW of the
centerline of a dirt road, 77.5 feet (23.6 m) NE of the NE corner of a power
house room adjoining the Port Hueneme light house, set in a concrete post 1.0
feet (0.5 m) square, and 1.5 feet (0.8 m) in diameter.
BENCH MARK STAMPING: N 5579.94 MON 11 E 6903.07
MONUMENTATION: Survey Disk VM#: 8042
AGENCY: PID#: EW6084
SETTING CLASSIFICATION: Concrete Port
The bench mark is 200.0 feet (61.0 m) south of the entrance gate to the U.S.
Navy Docks, 99.0 feet (30.2 m) NW of the entrance gate to all docks at the west
end of Main Street, 6.0 feet (1.8 m) west of the west rail of the railroad
tracks set in top of a concrete post surrounded by a 1.3 foot (0.4 m) diameter
pipe and a 3.0 foot (0.9 m) square concrete block, 0.5 foot (0.2m) below street
surface, and covered with a manhole cover located in the center of the
intersections of Maritime and Shipside Roads.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 6
PUBLICATION DATE: 12/10/1984
Station ID: 9411065 SUPERCEDED DATE: 04/21/2003
Name: PORT HUENEME
CALIFORNIA
NOAA Chart: 18725 Latitude: 34° 8.9' N
USGS Quad: OXNARD Longitude: 119° 12.2' W
T I D A L D A T U M S
Tidal datums at PORT HUENEME based on:
LENGTH OF SERIES: 19 YEARS
TIME PERIOD: 1941-1959
TIDAL EPOCH: 1960-1978
CONTROL TIDE STATION: 9410660 LOS ANGELES
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in FEET:
HIGHEST OBSERVED WATER LEVEL (02/04/1958) = 7.67
MEAN HIGHER HIGH WATER MHHW = 5.47
MEAN HIGH WATER MHW = 4.70
* NATIONAL GEODETIC VERTICAL DATUM NGVD29 = 2.88
MEAN TIDE LEVEL MTL = 2.84
MEAN LOW WATER MLW = 0.98
MEAN LOWER LOW WATER MLLW = 0.00
LOWEST OBSERVED WATER LEVEL (01/07/1951) = -2.33
* NGVD reference based on adjustment of 1973 and NOS levels of 1940.
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In FEET above:
Stamping or Designation MLLW MHW
6 RESET 1970 14.84 10.14
BM 3 1932 14.02 9.32
NO 8 1949 18.97 14.27
NO 9 1949 12.47 7.77
8 LA 8.60 3.90
JAD RE 224 10.36 5.66
LIGHT 1921 11.01 6.31
N 5579.94 MON 11 E 6903.07 9.67 4.97
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 6
PUBLICATION DATE: 12/10/1984
Station ID: 9411065 SUPERCEDED DATE: 04/21/2003
Name: PORT HUENEME
CALIFORNIA
NOAA Chart: 18725 Latitude: 34° 8.9' N
USGS Quad: OXNARD Longitude: 119° 12.2' 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.