U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 4
PUBLICATION DATE: 05/03/1982
Station ID: 9413616 SUPERCEDED DATE: 04/21/2003
Name: MOSS LANDING OCEAN PIER, PACIFICOCEAN
CALIFORNIA
NOAA Chart: 18685 Latitude: 36° 48.1' N
USGS Quad: MOSSLANDING Longitude: 121° 47.4' W
To reach the tidal bench marks proceed north along State Highway 1, over Moro
Cojo Slough, west on first road north of Tailing Pond, left on road over the
Moro Cojo Slough again and thence over channel to the Moss Landing Marine
Laboratory and Harbor District Office area. The tide gage and staff were
located on the west end of Mossing Landing Ocean Pier.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 3616 A 1976
MONUMENTATION: Survey Disk VM#: 8052
AGENCY: PID:
SETTING CLASSIFICATION: Concrete Block
The bench mark is set horizontally in northeast corner of top of a concrete
block, 33.4 feet west of centerline of Moss Landing Road and 6.2 feet south of
southeast corner of Moss Landing Manufacturing Incorporated.
BENCH MARK STAMPING: 3616 B 1976
MONUMENTATION: Survey Disk VM#: 8053
AGENCY: PID:
SETTING CLASSIFICATION: Seawall
The bench mark is set horizontally on inside of concrete seawall at Moss Landing
Marine Laboratory, 9 feet from northeast corner of laboratory, 1.5 feet from
north end of seawall, and 3.3 feet below top of seawall.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 4
PUBLICATION DATE: 05/03/1982
Station ID: 9413616 SUPERCEDED DATE: 04/21/2003
Name: MOSS LANDING OCEAN PIER, PACIFICOCEAN
CALIFORNIA
NOAA Chart: 18685 Latitude: 36° 48.1' N
USGS Quad: MOSSLANDING Longitude: 121° 47.4' W
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 3616 C 1976
MONUMENTATION: Survey Disk VM#: 8054
AGENCY: PID:
SETTING CLASSIFICATION: Copper-Clad Steel Rod
The bench mark is set on a copper-clad steel rod, inside a white PVC pipe
extending 0.1 foot above grade, 75 feet northeast of northeast end of the bridge
across the harbor, 52 feet east southeast of the centerline of Moss Landing and
23 feet south southwest of harbor parking lot.
BENCH MARK STAMPING: 3616 D 1976
MONUMENTATION: Survey Disk VM#: 8055
AGENCY: PID:
SETTING CLASSIFICATION: Copper-Clad Steel Rod
The bench mark is set on a copper-clad steel rod, inside a white PVC pipe
extending 0.2 foot above grade, 7.6 feet south southwest of northeast corner of
Moss Landing Harbor District Office, and 5.7 feet east of east wall of office
building.
BENCH MARK STAMPING: 3616 E 1976
MONUMENTATION: Survey Disk VM#: 8056
AGENCY: PID:
SETTING CLASSIFICATION: Copper-Clad Steel Deep Rod
The bench mark is set on a copper-clad steel rod, inside a white PVC pipe
extending 0.4 foot above grade, 120 feet west-southwest of centerline of State
Highway 1, 71 feet north northwest of center of traffic island at the
intersection of State Highway 1 and Moss Landing road and 5.2 feet south
southwest of a telephone pole.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 4
PUBLICATION DATE: 05/03/1982
Station ID: 9413616 SUPERCEDED DATE: 04/21/2003
Name: MOSS LANDING OCEAN PIER, PACIFICOCEAN
CALIFORNIA
NOAA Chart: 18685 Latitude: 36° 48.1' N
USGS Quad: MOSSLANDING Longitude: 121° 47.4' W
T I D A L D A T U M S
Tidal datums at MOSS LANDING OCEAN PIER, PACIFICOCEAN based on:
LENGTH OF SERIES: 15 MONTHS
TIME PERIOD: JUNE 1976 - AUGUST1977
TIDAL EPOCH: 1960-1978
CONTROL TIDE STATION: 9413450 MONTEREY, CA
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in FEET:
MEAN HIGHER HIGH WATER MHHW = 5.30
MEAN HIGH WATER MHW = 4.60
MEAN TIDE LEVEL MTL = 2.82
MEAN LOW WATER MLW = 1.07
MEAN LOWER LOW WATER MLLW = 0.00
Bench Mark Elevation Information In FEET above:
Stamping or Designation MLLW MHW
3616 A 1976 14.37 9.77
3616 B 1976 13.63 9.03
3616 C 1976 8.02 3.42
3616 D 1976 11.75 7.15
3616 E 1976 13.97 9.37
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 4
PUBLICATION DATE: 05/03/1982
Station ID: 9413616 SUPERCEDED DATE: 04/21/2003
Name: MOSS LANDING OCEAN PIER, PACIFICOCEAN
CALIFORNIA
NOAA Chart: 18685 Latitude: 36° 48.1' N
USGS Quad: MOSSLANDING Longitude: 121° 47.4' 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.