U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 5
Station ID: 9410396 PUBLICATION DATE: 11/13/2003
Name: OCEANSIDE HARBOR
CA
NOAA Chart: 18740 Latitude: 33° 12.6' N ( 33.21000)
USGS Quad: OCEANSIDE Longitude: 117° 23.7' W (-117.39500)
To reach the tidal bench marks proceed north along Interstate 5 from Oceanside
to Harbor Drive exit, then west toward the Oceanside Harbor Headquarters pier at
1540 Harbor Drive. The tide gage and staff were located on the Oceanside Marina
Center dock.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 0396 A 1979
DESIGNATION: 941 0396 A TIDAL
MONUMENTATION: Tidal Station disk VM#: 7990
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Flagpole base OPUS PID:
LATITUDE: 33° 12.6' N ( 33.21000) LONGITUDE: 117° 23.6' W (-117.39300)
The primary bench mark is a disk set in SW corner of flagpole base, 5.33 m (17.5
ft) NW of SW corner of ERWIN SKLAR 1910-1974 Monument plaque and 0.55 m (1.8 ft)
SW of flagploe at Oceanside Harbor Headquarters.
BENCH MARK STAMPING: 0396 B 1979
DESIGNATION: 941 0396 B TIDAL
MONUMENTATION: Tidal Station disk VM#: 7991
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete foundation OPUS PID#: BBCR82
LATITUDE: 33° 12.6' N ( 33.21000) LONGITUDE: 117° 23.6' W (-117.39300)
The bench mark is a disk set in NE corner of boat ramp concrete foundation
between berths 80 and 79 at the harbor, across the street from lights OCEANSIDE
sign of large individual block letters, 10 m (34 ft) SW of yellow fire hydrant
and 2.80 m (9.2 ft) west of west curb of Harbor Drive.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 5
Station ID: 9410396 PUBLICATION DATE: 11/13/2003
Name: OCEANSIDE HARBOR
CA
NOAA Chart: 18740 Latitude: 33° 12.6' N ( 33.21000)
USGS Quad: OCEANSIDE Longitude: 117° 23.7' W (-117.39500)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 0396 C 1979
DESIGNATION: 941 0396 C TIDAL
MONUMENTATION: Tidal Station disk VM#: 7992
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete wing wall OPUS PID:
LATITUDE: 33° 12.6' N ( 33.21000) LONGITUDE: 117° 23.6' W (-117.39300)
The bench mark is a disk set in top of and in center of south wingwall of boat
ramp one, north of boat ramp, between berths Y12 and 13, 7.99 m (26.2 ft) west
of west curb of Harbor Drive, 6.04 m (19.8 ft) SW of SW corner of concrete
structure enclosing a gas main, and 5.27 m (17.3 ft) feet west of light post.
BENCH MARK STAMPING: 0396 E 1979
DESIGNATION: 941 0396 E TIDAL
MONUMENTATION: Tidal Station disk VM#: 7993
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Unspecified deep rod OPUS PID:
LATITUDE: 33° 12.6' N ( 33.21000) LONGITUDE: 117° 23.6' W (-117.39300)
The bench mark is a disk located at the east end of tunnel leading from Cape Cod
Village to east parking lot, 14.78 m (48.5 ft) south of fire hydrant No. 1136,
5.33 m (17.5 ft) SE of SE wingwall of tunnel (under railroad tracks), 0.46 m
(1.5 ft) SW of white wood witness post, and level with grade. The bench mark is
set on a rod, driven 15 m (48 ft) to refusal, and enclosed in PVC pipe extending
0.21 m (0.7 ft) above grade,
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 5
Station ID: 9410396 PUBLICATION DATE: 11/13/2003
Name: OCEANSIDE HARBOR
CA
NOAA Chart: 18740 Latitude: 33° 12.6' N ( 33.21000)
USGS Quad: OCEANSIDE Longitude: 117° 23.7' W (-117.39500)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: SLR 101 1974
DESIGNATION: 941 0396 SLR 101 1974
MONUMENTATION: Bench Mark disk VM#: 7994
AGENCY: Army COE IDB PID#:
SETTING CLASSIFICATION: Concrete wing wall OPUS PID:
LATITUDE: 33° 12.6' N ( 33.21000) LONGITUDE: 117° 23.6' W (-117.39300)
The bench mark is a disk set in top of NE wingwall of Atcheson, Topeka, and
Santa Fe railroad bridge over San Luis Rey River.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 5
Station ID: 9410396 PUBLICATION DATE: 11/13/2003
Name: OCEANSIDE HARBOR
CA
NOAA Chart: 18740 Latitude: 33° 12.6' N ( 33.21000)
USGS Quad: OCEANSIDE Longitude: 117° 23.7' W (-117.39500)
T I D A L D A T U M S
Tidal datums at OCEANSIDE HARBOR based on:
LENGTH OF SERIES: 8 MONTHS
TIME PERIOD: October 1979 - May 1980
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION: 9410230 LA JOLLA, PACIFIC OCEAN
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
MEAN HIGHER HIGH WATER MHHW = 1.630
MEAN HIGH WATER MHW = 1.405
MEAN TIDE LEVEL MTL = 0.839
MEAN SEA LEVEL MSL = 0.832
MEAN LOW WATER MLW = 0.274
MEAN LOWER LOW WATER MLLW = 0.000
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
0396 A 1979 4.960 3.555
0396 B 1979 2.973 1.568
0396 C 1979 2.862 1.457
0396 E 1979 3.874 2.469
SLR 101 1974 8.008 6.603
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 5
Station ID: 9410396 PUBLICATION DATE: 11/13/2003
Name: OCEANSIDE HARBOR
CA
NOAA Chart: 18740 Latitude: 33° 12.6' N ( 33.21000)
USGS Quad: OCEANSIDE Longitude: 117° 23.7' W (-117.39500)
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.