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Bench Mark Sheet for 9410650, CABRILLO BEACH 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Superseded Epoch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Small blue map location marker Unpublished bench mark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 10

                                                                                
Station ID: 9410650                         PUBLICATION DATE:  05/15/2003
Name:       CABRILLO BEACH                                    
            CA
NOAA Chart: 18751                           Latitude:   33° 42.4' N (  33.70670)
USGS Quad:  LONG BEACH                      Longitude: 118° 16.4' W (-118.27300)


To reach the tidal bench marks from Interstate Highway 110 southbound (Harbor
Freeway), take the Gaffey Street exit, proceed on Gaffey Street and turn left
onto 9th Street, then proceed on 9th Street to turn right onto Pacific Street
and proceed, turning left at the sign for Cabrillo Beach State Park.  The bench
marks are in the vicinity of the park and along the breakwater.  The tide gage
was located in the pump room behind the restrooms at the fishing pier concession
stand near the breakwater.


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


                 PRIMARY BENCH MARK STAMPING:  NO 12 1973
                         DESIGNATION:          941 0650 TIDAL 12

MONUMENTATION:           Tidal Station disk                    VM#:         8011
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  DY2506
SETTING CLASSIFICATION:  Concrete base                         OPUS PID:        
LATITUDE:   33° 42.5' N (  33.70830)          LONGITUDE: 118° 16.7' W (-118.27800)


The primary bench mark is a disk set flush in the base of the fourth concrete
street light in a series running from the fishing pier along the road leading
approximately SE-NW towards the Juan Rodriguez Cabrillo statue, 560 m (1837 ft)
SE of the Juan Rodriguez Cabrillo statue, 40 m (130 ft) SE of a pole-gate with
chain and lock, 13 m (44 ft) SW of the NW edge of the old granite breakwater,
4.57 m (15.0 ft) SW of the centerline of the paved road, and 0.94 m (3.1 ft) SW
of the SW side of the asphalt curb of the road leading to the pier.  NOTE: The
section of the light pole base at the described location of the mark is missing
and the mark is assumed to be destroyed.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  2 of 10

                                                                                
Station ID: 9410650                         PUBLICATION DATE:  05/15/2003
Name:       CABRILLO BEACH                                    
            CA
NOAA Chart: 18751                           Latitude:   33° 42.4' N (  33.70670)
USGS Quad:  LONG BEACH                      Longitude: 118° 16.4' W (-118.27300)


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


                         BENCH MARK STAMPING:  NO 3 1950
                         DESIGNATION:          TIDAL 3 STA II 16

MONUMENTATION:           Tidal Station disk                    VM#:         8005
AGENCY:                  US Coast and Geodetic Survey
                         (USC&GS)                              IDB PID#:  DY1101
SETTING CLASSIFICATION:  Granite boulder                       OPUS PID:        
LATITUDE:   33° 42.4' N (  33.70670)          LONGITUDE: 118° 16.5' W (-118.27500)


The bench mark is a disk set in top of a gray granite boulder in the centerline
of the breakwater rocks, 174 m (570 ft) SE of bench mark NO 11 1973, 73 m (240
ft) NW of the 0.91 m (3 ft) high ruins of a concrete structure in the center of
the breakwater, 64 m (210 ft) SE of the tangent to the SE side of the building
on the pier, 2 m (7 ft) south of the remains of a piece of concrete pedestal
once used to hold a pipeline, and 0.76 m (2.5 ft) SW of the centerline of the
breakwater. NOTE:  The stamping has eroded away and is no longer legible.



                         BENCH MARK STAMPING:  NO 4 1950
                         DESIGNATION:          941 0650 TIDAL 4

MONUMENTATION:           Tidal Station disk                    VM#:         8006
AGENCY:                  US Coast and Geodetic Survey
                         (USC&GS)                              IDB PID#:  DY1100
SETTING CLASSIFICATION:  Concrete walk                         OPUS PID:        
LATITUDE:   33° 42.6' N (  33.71000)          LONGITUDE: 118° 17.0' W (-118.28300)


The bench mark is a disk set in the concrete sidewalk near the SW corner of the
museum and cafe (abandoned) at Cabrillo Beach, 46.21 m (151.6 ft) south of the
center of the south lane of the traffic circle around the Cabrillo statue, 0.30
m (1 ft) east of the SW corner of the building, and 0.21 m (0.7 ft) south of the
south side of the building.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  3 of 10

                                                                                
Station ID: 9410650                         PUBLICATION DATE:  05/15/2003
Name:       CABRILLO BEACH                                    
            CA
NOAA Chart: 18751                           Latitude:   33° 42.4' N (  33.70670)
USGS Quad:  LONG BEACH                      Longitude: 118° 16.4' W (-118.27300)


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


                         BENCH MARK STAMPING:  NO 5 1950
                         DESIGNATION:          941 0650 TIDAL 5

MONUMENTATION:           Tidal Station disk                    VM#:         8007
AGENCY:                  US Coast and Geodetic Survey
                         (USC&GS)                              IDB PID#:  DY1099
SETTING CLASSIFICATION:  Concrete foundation                   OPUS PID:        
LATITUDE:   33° 42.6' N (  33.71000)          LONGITUDE: 118° 17.1' W (-118.28500)


The bench mark is a disk set in top and near the center of the SE edge of the
concrete base for the statue of Juan Rodriguez Cabrillo which is located near
the center of a traffic circle, 18.81 m (61.7 ft) north of the center of the
south lane of the circle, 16.18 m (53.1 ft) NE of the north end of a sign
(Cabrillo Beach), 0.91 m (3 ft) west of the SW corner of the statue base, and
0.79 m (2.6 ft) above the level of the traffic circle.



                         BENCH MARK STAMPING:  NO 9 1973
                         DESIGNATION:          941 0650 TIDAL 9

MONUMENTATION:           Tidal Station disk                    VM#:         8008
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  DY2509
SETTING CLASSIFICATION:  Concrete pier                         OPUS PID:        
LATITUDE:   33° 42.4' N (  33.70670)          LONGITUDE: 118° 16.5' W (-118.27500)


The bench mark is a disk set flush in the concrete pier deck on the SE side of
the concession building, 5 m (17 ft) NE of a wire gage fence, 3.51 m (11.5 ft)
south of the NE corner of the building, 1.49 m (4.9 ft) SE of the SE wall of the
building, 0.21 m (0.7 ft) NW of the NW edge of the pier, and 0.18 m (0.6 ft) NW
of the SE railing surrounding three sides of the walkway around the concession
building.  

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  4 of 10

                                                                                
Station ID: 9410650                         PUBLICATION DATE:  05/15/2003
Name:       CABRILLO BEACH                                    
            CA
NOAA Chart: 18751                           Latitude:   33° 42.4' N (  33.70670)
USGS Quad:  LONG BEACH                      Longitude: 118° 16.4' W (-118.27300)


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


                         BENCH MARK STAMPING:  NO 10 1973
                         DESIGNATION:          941 0650 TIDAL 10

MONUMENTATION:           Tidal Station disk                    VM#:         8009
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  DY2508
SETTING CLASSIFICATION:  Concrete pier                         OPUS PID:        
LATITUDE:   33° 42.5' N (  33.70830)          LONGITUDE: 118° 16.6' W (-118.27700)


The bench mark is a disk set in a concrete pier deck, about midway between the
NW end of the fishing pier and the concession building on the pier at Cabrillo
beach,  0.85 km (0.53 mi) SE of the Juan Rodriguez Cabrillo statue, 2.50 m (8.2
ft) SW of the centerline of the pier, 0.70 m (2.3 ft) NW of the fifth light pole
SE of the access pier to the main pier and 0.61 m (2.0 ft) NE of the SW edge of
the concrete pier deck.  The bench mark is set 0.09 m (0.3 ft) below the level
of the pier deck and is encased in a 5-inch logo cap.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  5 of 10

                                                                                
Station ID: 9410650                         PUBLICATION DATE:  05/15/2003
Name:       CABRILLO BEACH                                    
            CA
NOAA Chart: 18751                           Latitude:   33° 42.4' N (  33.70670)
USGS Quad:  LONG BEACH                      Longitude: 118° 16.4' W (-118.27300)


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


                         BENCH MARK STAMPING:  NO 11 1973
                         DESIGNATION:          941 0650 TIDAL 11

MONUMENTATION:           Tidal Station disk                    VM#:         8010
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  DY2507
SETTING CLASSIFICATION:  Concrete abutment                     OPUS PID:        
LATITUDE:   33° 42.5' N (  33.70830)          LONGITUDE: 118° 16.6' W (-118.27700)


The bench mark is a disk set the concrete abutment and deck of the fishing pier,
0.74 km (0.46 mi) SE of the Juan Rodriguez Cabrillo statue, 32 m (106 ft) NE of
the southeasternmost concrete street lamp (the last of a series running from NW
to SE from inshore to the pier), 10 m (33 ft) NE of the centerline of the
asphalt road leading to the pier, 4.72 m (15.5 ft) NE of the NE corner of a 1.37
m (4.5 ft) high concrete construction monument at the beginning of the pier,
3.66 m (12.0 ft) SE of the centerline of the SW to NE running portion of the
pier and 0.79 m (2.6 ft) north of the SW end of a guardrail.  The benchmark is
is set 0.09 m (0.3 ft) below grade and is covered by a 5-inch logo cap.  NOTE:
The disk has been mutilated and the "No." and part of the first "1" are
illegible.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  6 of 10

                                                                                
Station ID: 9410650                         PUBLICATION DATE:  05/15/2003
Name:       CABRILLO BEACH                                    
            CA
NOAA Chart: 18751                           Latitude:   33° 42.4' N (  33.70670)
USGS Quad:  LONG BEACH                      Longitude: 118° 16.4' W (-118.27300)


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


                         BENCH MARK STAMPING:  NO 13 1973
                         DESIGNATION:          941 0650 TIDAL 13

MONUMENTATION:           Tidal Station disk                    VM#:         8012
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  DY2505
SETTING CLASSIFICATION:  Concrete base                         OPUS PID:        
LATITUDE:   33° 42.6' N (  33.71000)          LONGITUDE: 118° 16.8' W (-118.28000)


The bench mark is a disk set in the NE corner of the concrete base for the first
light pole NW of the fishing pier parking area, 0.3 km (0.2 mi) SE of the Juan
Rodriguez Cabrillo statue, 8.29 m (27.2 ft) NW of the center of the NW entrance
road to the parking area, 4.51 m (14.8 ft) SW of the centerline of the road
leading to the pier, 1.07 m (3.5 ft) NNE of the NE end of a woven wire fence at
the NW end of the pier parking lot, and 1.01 m (3.3 ft) SW of the SW curb of the
asphalt road leading to the pier, and is 0.21 m (0.7 ft) below grade.          

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  7 of 10

                                                                                
Station ID: 9410650                         PUBLICATION DATE:  05/15/2003
Name:       CABRILLO BEACH                                    
            CA
NOAA Chart: 18751                           Latitude:   33° 42.4' N (  33.70670)
USGS Quad:  LONG BEACH                      Longitude: 118° 16.4' W (-118.27300)


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


                         BENCH MARK STAMPING:  0650 S 1980
                         DESIGNATION:          941 0650 S TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         8013
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:        
SETTING CLASSIFICATION:  Copper-clad steel rod                 OPUS PID:        
LATITUDE:   33° 42.4' N (  33.70670)          LONGITUDE: 118° 16.4' W (-118.27300)


The bench mark is a disk located in the southernmost of two eucalyptus tree
planters at the Cabrillo Beach boat trailer parking lot, 104 m (340 ft) NE of
the NE corner of the northernmost of two Cabrillo Beach Marine Museum buildings
located in the parking lot, 52 m (171 ft) SW of the SW corner of the public
restrooms nearest the boat landing ramp, 16 m (51 ft) north of a concrete base
metal light post, 5.70 m (18.7 ft) north of the SW corner of the planter curb,
0.76 m (2.5 ft) NNW of a 4-inch square wooden witness post, and 0.61 m (2.0 ft)
east of the planter curb. The bench mark is crimped to a copper-clad steel rod
and driven to a depth of 5.6 m (18 ft).

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  8 of 10

                                                                                
Station ID: 9410650                         PUBLICATION DATE:  05/15/2003
Name:       CABRILLO BEACH                                    
            CA
NOAA Chart: 18751                           Latitude:   33° 42.4' N (  33.70670)
USGS Quad:  LONG BEACH                      Longitude: 118° 16.4' W (-118.27300)


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


                         BENCH MARK STAMPING:  0650 T 1980
                         DESIGNATION:          941 0650 T TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         8014
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:        
SETTING CLASSIFICATION:  Copper-clad steel rod                 OPUS PID:        
LATITUDE:   33° 42.4' N (  33.70670)          LONGITUDE: 118° 16.4' W (-118.27300)


The bench mark is a disk located at the SE corner of the Cabrillo Beach Heavy
Equipment Yard and Maintenance Building, 160 m (525 ft) NW of the Juan Rodriguez
Cabrillo statue, 42 m (138 ft) south of the SE corner of the loading platform on
the south side of the northernmost of two Cabrillo Beach Marine Museum
buildings, 1.52 m (5.0 ft) east of the SE corner of the Cabrillo Beach
Maintenance Building, and 0.55 m (1.8 ft) west of a 4-inch square wooden witness
post and sign.  The bench mark is crimped to a copper-clad steel rod driven to a
depth of 4.3 m (14 ft).

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  9 of 10

                                                                                
Station ID: 9410650                         PUBLICATION DATE:  05/15/2003
Name:       CABRILLO BEACH                                    
            CA
NOAA Chart: 18751                           Latitude:   33° 42.4' N (  33.70670)
USGS Quad:  LONG BEACH                      Longitude: 118° 16.4' W (-118.27300)


                            T I D A L   D A T U M S 


Tidal datums at CABRILLO BEACH based on:

     LENGTH OF SERIES:      5 Years
     TIME PERIOD:           January 1974 - December 1980
     TIDAL EPOCH:           1983-2001
     CONTROL TIDE STATION:  9410660 LOS ANGELES, OUTER HARBOR


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

     HIGHEST OBSERVED WATER LEVEL (01/07/1974)         =  2.267
     MEAN HIGHER HIGH WATER                     MHHW   =  1.671
     MEAN HIGH WATER                            MHW    =  1.446
     MEAN TIDE LEVEL                            MTL    =  0.866
     MEAN SEA LEVEL                             MSL    =  0.860
     MEAN LOW WATER                             MLW    =  0.286
     North American Vertical Datum              NAVD88 =  0.075
     MEAN LOWER LOW WATER                       MLLW   =  0.000
     LOWEST  OBSERVED WATER LEVEL (12/08/1980)         = -0.976

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     NO 12 1973                                  4.257    2.811
     NO 3 1950                                   3.620    2.174
     NO 4 1950                                   4.221    2.775
     NO 5 1950                                   5.496    4.050
     NO 9 1973                                   4.227    2.781
     NO 10 1973                                  4.212    2.766
     NO 11 1973                                  4.189    2.743
     NO 13 1973                                  4.370    2.924
     0650 S 1980                                 3.792    2.346
     0650 T 1980                                 4.411    2.965


                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page 10 of 10

                                                                                
Station ID: 9410650                         PUBLICATION DATE:  05/15/2003
Name:       CABRILLO BEACH                                    
            CA
NOAA Chart: 18751                           Latitude:   33° 42.4' N (  33.70670)
USGS Quad:  LONG BEACH                      Longitude: 118° 16.4' W (-118.27300)


                             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 9410650 CABRILLO BEACH, CA

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