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National Ocean Service
Datums Page Page 1 of 10
Station ID: 9410230 PUBLICATION DATE: 09/20/2017
Name: LA JOLLA, PACIFIC OCEAN
CA
NOAA Chart: 18765 Latitude: 32° 52.0' N ( 32.86689)
USGS Quad: LA JOLLA Longitude: 117° 15.4' W (-117.25714)
To reach the tidal bench marks from San Diego, CA, go north on Interstate I-5
and exit onto La Jolla Parkway (which becomes Arduth Road), proceed about 3.2 km
(2 mi) and turn right onto La Jolla Village Drive, go north about 1.6 km (1.0
mi) and turn left at Discovery Way (marked Scripps Pier & Aquarium), then take
Discovery Way to the bottom of the hill (2 blocks) to the Scripps pier and
station. The tidal bench marks are located in the vicinity of Scripps Pier.
Tide gauges are in room in the SW corner in the building at the end of the Pier.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 7 1958
DESIGNATION: 941 0230 TIDAL 7
MONUMENTATION: Bench Mark disk VM#: 1641
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: DC0986
SETTING CLASSIFICATION: Concrete planter OPUS PID:
LATITUDE: 32° 52.0' N ( 32.86617) LONGITUDE: 117° 15.2' W (-117.25375)
The primary bench mark is a disk set in top of a concrete retaining wall, 17.31
m (56.8 ft) east of SE corner of Center for Coastal Studies Building, 10.97 m
(36.0 ft) NE of the intersection of the dock and Scripps maintenance yard, 9.39
m (30.8 ft) north of centerline of Discovery Way, 0.46 m (1.5 ft) south of the
SW corner of the Benthic Laboratory Control Center, and 0.49 m (1.6 ft) above
the street level.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 10
Station ID: 9410230 PUBLICATION DATE: 09/20/2017
Name: LA JOLLA, PACIFIC OCEAN
CA
NOAA Chart: 18765 Latitude: 32° 52.0' N ( 32.86689)
USGS Quad: LA JOLLA Longitude: 117° 15.4' W (-117.25714)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 6 1952
DESIGNATION: 941 0230 TIDAL 6
MONUMENTATION: Bench Mark disk VM#: 1644
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: DC0990
SETTING CLASSIFICATION: Concrete sea wall OPUS PID:
LATITUDE: 32° 52.0' N ( 32.86647) LONGITUDE: 117° 15.2' W (-117.25403)
The bench mark is a disk set in top of a 2 m (7 ft) concrete sea wall, 30 m (98
ft) north of east end of pier, 6.10 m (20.0 ft) south of north edge of concrete
ramp leading to the beach, 3.81 m (12.5 ft) north of the NW corner of Center for
Coastal Studies Building, 0.50 m (1.6 ft) east of the point where the sea wall
makes a 130-degree turn away from the beach, and 4 m (12 ft) below pier floor.
BENCH MARK STAMPING: BASIC 1929 RESET 1963 RESET 1964
DESIGNATION: 941 0230 TIDAL BASIC RST
MONUMENTATION: Bench Mark disk VM#: 1646
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: DC1308
SETTING CLASSIFICATION: Concrete loading platform OPUS PID:
LATITUDE: 32° 52.0' N ( 32.86619) LONGITUDE: 117° 15.2' W (-117.25403)
The bench mark is a disk set flush in the concrete loading platform of the
Center for Coastal Studies, located 9 m (30 ft) north of the extended centerline
of the pier, 1.46 m (4.8 ft) north of the south edge of the top step leading to
the door to building and just outside door, and 0.15 m (0.5 ft) east of a 1.01 m
(3.3 ft) high retaining wall.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 10
Station ID: 9410230 PUBLICATION DATE: 09/20/2017
Name: LA JOLLA, PACIFIC OCEAN
CA
NOAA Chart: 18765 Latitude: 32° 52.0' N ( 32.86689)
USGS Quad: LA JOLLA Longitude: 117° 15.4' W (-117.25714)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: NO 10 1974
DESIGNATION: 941 0230 TIDAL 10
MONUMENTATION: Tidal Station disk VM#: 1648
AGENCY: National Ocean Survey (NOS) IDB PID#: DC1310
SETTING CLASSIFICATION: Concrete planter OPUS PID:
LATITUDE: 32° 52.0' N ( 32.86656) LONGITUDE: 117° 15.2' W (-117.25336)
The bench mark is a disk set in SE corner of concrete planter, located north of
the north set of steps leading to Scripps Institution of Oceanography Storehouse
(Building T42), 53 m (175 ft) NE of bench mark 7 1958 in the east area of the
maintenance yards, 1.61 m (5.3 ft) east of the SE corner of planter, 0.21 m (0.7
ft) west of the west wall of the storehouse, and 1.07 m (3.5 ft) above ground
level.
BENCH MARK STAMPING: 0230 M 1977
DESIGNATION: 941 0230 M TIDAL
MONUMENTATION: Tidal Station disk VM#: 1650
AGENCY: National Ocean Survey (NOS) IDB PID#: DC1313
SETTING CLASSIFICATION: Copper-clad steel rod OPUS PID#: DC1313
LATITUDE: 32° 51.9' N ( 32.86539) LONGITUDE: 117° 15.3' W (-117.25422)
The bench mark is a disk located 37.80 m (124.0 ft) west of the NW corner of the
Ritter Hall Building, 22.25 m (73.0 ft) NW of the NE corner of the Public
Affairs Office, 1.16 m (3.8 ft) west of the west edge of the pathway, and 0.49 m
(1.6 ft) north of an orange fiberglass witness post. The bench mark is set 6 cm
(0.2 ft) below ground level, crimped to the top of a copper-clad 5/8-inch steel
rod driven to a depth of 12.8 m (42 ft), and encased in a 4-inch PVC pipe set in
an irregular concrete mass.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 10
Station ID: 9410230 PUBLICATION DATE: 09/20/2017
Name: LA JOLLA, PACIFIC OCEAN
CA
NOAA Chart: 18765 Latitude: 32° 52.0' N ( 32.86689)
USGS Quad: LA JOLLA Longitude: 117° 15.4' W (-117.25714)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 0230 P 1988
DESIGNATION: 941 0230 P
MONUMENTATION: Tidal Station disk VM#: 1652
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete pier OPUS PID:
LATITUDE: 32° 52.0' N ( 32.86697) LONGITUDE: 117° 15.4' W (-117.25714)
The bench mark is a disk set flush in the concrete pier floor, 25.91 m (85.0 ft)
ESE of the offshore end of the Scripp's Pier, 4.85 m (15.9 ft) SSW of small yale
lift crane located on the north side of pier, and 1.34 m (4.4 ft) NW from the NW
corner of the Scripp's building on the outer pier.
BENCH MARK STAMPING: 0230 Q 1991
DESIGNATION: 941 0230 Q
MONUMENTATION: Tidal Station disk VM#: 6654
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete retaining wall OPUS PID:
LATITUDE: 32° 52.0' N ( 32.86586) LONGITUDE: 117° 15.2' W (-117.25406)
The bench mark is a disk set in the SE corner of the retaining wall for the
inshore pump station directly south of the inshore end of the Scripps Pier,
21.34 m (70.0 ft) SSW of a fire hydrant near the foot of the pier, 20.73 m (68.0
ft) west of the SW corner of Scholander Hall near where the round building
joins, and 0.3 m (1 ft) west of the east end of the south foot.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 10
Station ID: 9410230 PUBLICATION DATE: 09/20/2017
Name: LA JOLLA, PACIFIC OCEAN
CA
NOAA Chart: 18765 Latitude: 32° 52.0' N ( 32.86689)
USGS Quad: LA JOLLA Longitude: 117° 15.4' W (-117.25714)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 0230 R 1993
DESIGNATION: 941 0230 R
MONUMENTATION: Tidal Station disk VM#: 6766
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete slab OPUS PID:
LATITUDE: 32° 52.0' N ( 32.86669) LONGITUDE: 117° 15.2' W (-117.25386)
The bench mark is a disk set flush in a 1 m x 2 m (4 ft x 6 ft) concrete slab
surrounding a storm drain manhole, located north of the Scripps pier, atop the
dirt bank above the beach, 41 m (134 ft) north of the NW corner of the Grounds
Department Garage, 11 m (36 ft) west of the SW corner of a four-store office
building, 7 m (24 ft) SE of the SE corner of a large concrete storm drain out
fall on the beach, and 0.52 m (1.7 ft) west of the center of the manhole.
BENCH MARK STAMPING: 0230 S 2000
DESIGNATION: 941 0230 S
MONUMENTATION: Tidal Station disk VM#: 16180
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete pier OPUS PID:
LATITUDE: 32° 52.0' N ( 32.86669) LONGITUDE: 117° 15.2' W (-117.25386)
The bench mark is a disk set flush in Scripps Pier dock directly above concrete
piling #17 about midway along the Scripps Pier, 186 m (610 ft) east of the
offshore end of the pier, 150 m (492 ft) west of the inshore end of the pier,
6.50 m (21.3 ft) north of the south edge of the pier, and 0.3 m (1 ft) south of
the north edge of the pier.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 10
Station ID: 9410230 PUBLICATION DATE: 09/20/2017
Name: LA JOLLA, PACIFIC OCEAN
CA
NOAA Chart: 18765 Latitude: 32° 52.0' N ( 32.86689)
USGS Quad: LA JOLLA Longitude: 117° 15.4' W (-117.25714)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 0230 T 2008
DESIGNATION: 941 0230 T
MONUMENTATION: Tidal Station disk VM#: 18662
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Copper-clad steel rod OPUS PID:
LATITUDE: 32° 51.9' N ( 32.86478) LONGITUDE: 117° 15.2' W (-117.25383)
The bench mark is a disk located on the SW side of Pawka Green in the east end
of the southern most bed planted with trees, 35.90 m (117.8 ft) WNW of NW corner
of Sverdrup Hall structure (not low metal wall build-out), 25.60 m (84.0 ft) SE
of SE corner of 8630 Discovery Way (Admissions Building/Old Scripps), 12.05 m
(39.5 ft) SSE of SW corner of westernmost concrete seating in Pawka Green, 8.80
m (28.9 ft) NE of center of sewer manhole cover located on the southwest end of
Pawka Green, 8.00 m (26.2 ft) WSW of 2nd streetlamp east of access rd.
(Discovery Way?) and at the south end of Pawka Green, 2.10 m (6.9 ft) SSW of the
second post to the east on the southernmost hand railing of Pawka Green. The
bench mark is crimped to the top of a copper-clad rod driven 7.01 m (23.0 ft) to
refusal, and encased in a PVC pipe with an aluminum hatch.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 7 of 10
Station ID: 9410230 PUBLICATION DATE: 09/20/2017
Name: LA JOLLA, PACIFIC OCEAN
CA
NOAA Chart: 18765 Latitude: 32° 52.0' N ( 32.86689)
USGS Quad: LA JOLLA Longitude: 117° 15.4' W (-117.25714)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 0230 U 2016
DESIGNATION: 941 0230 U
MONUMENTATION: Metal Rod VM#: 21903
AGENCY: National Ocean Service IDB PID#:
SETTING CLASSIFICATION: Metal rod driven into the ground OPUS PID:
LATITUDE: 32° 51.8' N ( 32.86361) LONGITUDE: 117° 15.3' W (-117.25419)
The bench mark is a 9/16 inch (14 mm) stainless steel rod driven 35.4 ft (10.8
m) into the ground, 34.2 m (112.2 ft) S of Revelle Family Student Center, 7.5 m
(24.6 ft) W of the curb at the NW corner of the intersection of Kennel Way and
El Paseo Grande, 6.3 m (20.7 ft) NE of street light at intersection of El Paseo
Frande and walkway to beach, 2.5 m (8.2 ft) S of curb at the SE corner of p002
parking lot and 0.2 m (0.7 ft) N of witness post, with a PVC sleeve and aluminum
lid.
BENCH MARK STAMPING: 0230 V 2017
DESIGNATION: 941 0230 V
MONUMENTATION: Bench Mark disk VM#: 22305
AGENCY: National Ocean Service IDB PID#:
SETTING CLASSIFICATION: Concrete pier OPUS PID:
LATITUDE: 32° 52.0' N ( 32.86697) LONGITUDE: 117° 15.4' W (-117.25714)
The bench mark is a disk set flush in the concrete pier floor, 25.91 m (85.01
ft) ESE of the offshore end of the Scripp's Institute of Oceanography Pier, 7.9
m (25.9 ft) north of the south edge of the pier, 5.34 m (17.5 ft) SSW of a small
lift crane located on the north side of the pier, and 1.33 m (4.4 ft) W from the
NW corner of the pump house on the pier.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 8 of 10
Station ID: 9410230 PUBLICATION DATE: 09/20/2017
Name: LA JOLLA, PACIFIC OCEAN
CA
NOAA Chart: 18765 Latitude: 32° 52.0' N ( 32.86689)
USGS Quad: LA JOLLA Longitude: 117° 15.4' W (-117.25714)
T I D A L D A T U M S
Tidal datums at LA JOLLA, PACIFIC OCEAN based on:
LENGTH OF SERIES: 19 YEARS
TIME PERIOD: January 1983 - December 2001
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION:
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
HIGHEST OBSERVED WATER LEVEL (11/25/2015) = 2.381
MEAN HIGHER HIGH WATER MHHW = 1.624
MEAN HIGH WATER MHW = 1.402
MEAN TIDE LEVEL MTL = 0.839
MEAN SEA LEVEL MSL = 0.833
MEAN LOW WATER MLW = 0.276
North American Vertical Datum NAVD88 = 0.058
MEAN LOWER LOW WATER MLLW = 0.000
LOWEST OBSERVED WATER LEVEL (12/17/1933) = -0.874
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
7 1958 10.968 9.566
6 1952 4.656 3.255
BASIC 1929 RESET 1963 RESET 1964 10.081 8.679
NO 10 1974 11.449 10.047
0230 M 1977 9.360 7.958
0230 P 1988 10.143 8.741
0230 Q 1991 9.376 7.974
0230 R 1993 11.202 9.800
0230 S 2000 9.640 8.238
0230 T 2008 10.655 9.253
0230 U 2016 11.302 9.900
0230 V 2017 10.143 8.741
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 9 of 10
Station ID: 9410230 PUBLICATION DATE: 09/20/2017
Name: LA JOLLA, PACIFIC OCEAN
CA
NOAA Chart: 18765 Latitude: 32° 52.0' N ( 32.86689)
USGS Quad: LA JOLLA Longitude: 117° 15.4' W (-117.25714)
Foot Notes:
Bench marks 0230 U 2016 and 0230 V 2017 are based on one differential leveling
connection and do not meet the quality control standards of the NOS. Therefore,
caution should be used when deriving elevations for these marks.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 10 of 10
Station ID: 9410230 PUBLICATION DATE: 09/20/2017
Name: LA JOLLA, PACIFIC OCEAN
CA
NOAA Chart: 18765 Latitude: 32° 52.0' N ( 32.86689)
USGS Quad: LA JOLLA Longitude: 117° 15.4' W (-117.25714)
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.