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Bench Mark Sheet for 9410179, Ocean Beach, Point Loma CA

Superseded Epoch

Large map location marker Station Location
Small red map location marker Published bench mark
Small blue map location marker Unpublished bench mark

Bench mark positions only appear on the map if their coordinates in the CO-OPS database are at the precision of degrees/minutes/seconds/and tenths of seconds. If the coordinates are less precise, the mark will not appear.

Printable version

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
Datums Page                                                        Page  1 of  5

                                                                                
Station ID: 9410179                         PUBLICATION DATE:  12/10/2015
Name:       OCEAN BEACH, POINT LOMA                           
            CA
NOAA Chart: 18765                           Latitude:   32° 44.9' N (  32.74830)
USGS Quad:  Point Loma                      Longitude: 117° 15.3' W (-117.25500)


To reach the tidal bench marks from the San Diego International Airport
(Lindberg Field) follow North Harbor Drive West to Nimitz Boulevard and make a
right.  Keep to the left as Nimitz Boulevard veers right and runs into
Narragansett Avenue.  Follow Narragansett Avenue across Chatsworth Boulevard
until you reach Sunset Cliffs Boulevard.  Make a right on Sunset Cliffs
Boulevard and then a left onto Niagra street.  Follow Niagra Street to the Ocean
Beach Pier.  Tidehouse is 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:  0179 A 1994
                         DESIGNATION:          941 0179 A

MONUMENTATION:           TIDAL STATION DISK                    VM#:        15693
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Concrete base                         OPUS PID:        
LATITUDE:   32° 44.9' N (  32.74831)          LONGITUDE: 117° 15.3' W (-117.25500)


The primary bench mark is a disk set in the top of the SE corner of a 0.50 m x
0.50 m (1.6 ft x 1.6 ft) concrete base supporting light pole #18 which is the
sixth light pole on the north side of the pier when looking east from the
tidehouse, 400 m (1,312 ft) west of the east end of Ocean Beach pier, and 0.05 m
(0.2 ft) above the pier deck.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  2 of  5

                                                                                
Station ID: 9410179                         PUBLICATION DATE:  12/10/2015
Name:       OCEAN BEACH, POINT LOMA                           
            CA
NOAA Chart: 18765                           Latitude:   32° 44.9' N (  32.74830)
USGS Quad:  Point Loma                      Longitude: 117° 15.3' W (-117.25500)


                         T I D A L   B E N C H   M A R K S


                         BENCH MARK STAMPING:  0179 B 1994
                         DESIGNATION:          941 0179 B

MONUMENTATION:           TIDAL STATION DISK                    VM#:        15694
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Concrete deck                         OPUS PID:        
LATITUDE:   32° 44.9' N (  32.74831)          LONGITUDE: 117° 15.3' W (-117.25500)


The bench mark is a disk set flush in the concrete deck of the Ocean Beach Pier
on the southern side of the eastern end of the pier, 3.70 m (12.1 ft) north of
power pole # 86, 0.43 m (1.4 ft) west of the metal lip where the pier begins
from Niagra Street, 0.35 m (1.1 ft) north of the southern face of the pier, and
0.13 m (0.4 ft) north of the wooden railing.



                         BENCH MARK STAMPING:  0179 C 1994
                         DESIGNATION:          941 0179 C

MONUMENTATION:           TIDAL STATION DISK                    VM#:        15695
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Retaining wall                        OPUS PID:        
LATITUDE:   32° 44.9' N (  32.74831)          LONGITUDE: 117° 15.3' W (-117.25500)


The bench mark is a disk set flush in the top of the SE corner of the retaining
wall surrounding Ocean Beach public lot, 10.35 m (34.0 ft) NW of the SW corner
of 5064B Niagra Avenue, 8.25 m (27.1 ft) south of a power pole, 0.35 m (1.1 ft)
from the SE edge of the retaining wall, and 3.15 m (10.3 ft) above the parking
lot.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  3 of  5

                                                                                
Station ID: 9410179                         PUBLICATION DATE:  12/10/2015
Name:       OCEAN BEACH, POINT LOMA                           
            CA
NOAA Chart: 18765                           Latitude:   32° 44.9' N (  32.74830)
USGS Quad:  Point Loma                      Longitude: 117° 15.3' W (-117.25500)


                         T I D A L   B E N C H   M A R K S


                         BENCH MARK STAMPING:  0179 D 1994
                         DESIGNATION:          941 0179 D

MONUMENTATION:           TIDAL STATION DISK                    VM#:        15696
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Sea wall                              OPUS PID:        
LATITUDE:   32° 44.9' N (  32.74831)          LONGITUDE: 117° 15.3' W (-117.25500)


The bench mark is a disk set flush in the top of the southern end of the sea
wall located north of the steps along the Ocean Beach beach front, 7.90 m (25.9
ft) north of a flagpole, 8.50 m (27.9 ft) west of street lamp #5099, 0.10 m (0.3
ft) west of the eastern edge of the sea wall, and 0.42 m (1.4 ft) above the
sidewalk. 



                         BENCH MARK STAMPING:  0179 E 1994
                         DESIGNATION:          941 0179 E

MONUMENTATION:           TIDAL STATION DISK                    VM#:        15697
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Sea wall                              OPUS PID:        
LATITUDE:   32° 44.9' N (  32.74831)          LONGITUDE: 117° 15.3' W (-117.25500)


The bench mark is a disk set flush in the northern end of the sea wall at the
Ocean Beach beach, 20.73 m (73.0 ft) west of a 1.50 m (4.9 ft) tall steel
electrical box, 21.77 m (71.4 ft) south of a bench, 4.50 m (14.8 ft) east of the
SE leg of lifeguard hut No. 1, 0.20 m (0.7 ft) south of the northern end of the
wall, and 0.34 m (1.1 ft) above the sidewalk.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  4 of  5

                                                                                
Station ID: 9410179                         PUBLICATION DATE:  12/10/2015
Name:       OCEAN BEACH, POINT LOMA                           
            CA
NOAA Chart: 18765                           Latitude:   32° 44.9' N (  32.74830)
USGS Quad:  Point Loma                      Longitude: 117° 15.3' W (-117.25500)


                            T I D A L   D A T U M S 


Tidal datums at OCEAN BEACH, POINT LOMA based on:

     LENGTH OF SERIES:      2 MONTHS
     TIME PERIOD:           June 1994 - July 1994
     TIDAL EPOCH:           1983-2001
     CONTROL TIDE STATION:  9410230 LA JOLLA, PACIFIC OCEAN


Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METER:

     MEAN HIGHER HIGH WATER                     MHHW   =  1.623
     MEAN HIGH WATER                            MHW    =  1.398
     MEAN TIDE LEVEL                            MTL    =  0.832
     MEAN SEA LEVEL                             MSL    =  0.825
     MEAN LOW WATER                             MLW    =  0.266
     MEAN LOWER LOW WATER                       MLLW   =  0.000

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METER above:

     Stamping or Designation                    MLLW        MHW

     0179 A 1994                                 6.231    4.833
     0179 B 1994                                10.449    9.051
     0179 C 1994                                 8.210    6.812
     0179 D 1994                                 4.926    3.528
     0179 E 1994                                 4.888    3.490


                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  5 of  5

                                                                                
Station ID: 9410179                         PUBLICATION DATE:  12/10/2015
Name:       OCEAN BEACH, POINT LOMA                           
            CA
NOAA Chart: 18765                           Latitude:   32° 44.9' N (  32.74830)
USGS Quad:  Point Loma                      Longitude: 117° 15.3' W (-117.25500)


                             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.

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Products available at 9410179 Ocean Beach, Point Loma, CA

Revised: 08/08/2018
NOAA / National Ocean Service
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