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Bench Mark Sheet for 9410840, Santa Monica 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Superseded Epoch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Small blue map location marker Unpublished bench mark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  7

                                                                                
Station ID: 9410840                         PUBLICATION DATE:  04/21/2003
Name:       SANTA MONICA, PACIFIC OCEAN                       
            CA
NOAA Chart: 18744                           Latitude:   34°  0.5' N (  34.00830)
USGS Quad:  BEVERLY HILLS                   Longitude: 118° 30.0' W (-118.50000)


To reach the tidal bench marks from San Diego Freeway  (I-405) in Santa Monica
go west on Santa Monica Freeway (I-10) to the Lincoln Boulevard exit.  Exit
right and proceed NW on Lincoln Boulevard two blocks to Colorado Avenue, turn
left on Colorado Avenue and proceed SW until Colorado Avenue dead ends into
Santa Monica Municipal Pier.  The tidal bench marks are in the vicinity of the
Municipal Pier.   The tide house is located one deck below the Harbor Master's
Office at the seaward end of the pier. 


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


                 PRIMARY BENCH MARK STAMPING:  TIDAL BM 12 1974
                         DESIGNATION:          941 0840 TIDAL 12

MONUMENTATION:           Tidal Station disk                    VM#:          929
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  EW6840
SETTING CLASSIFICATION:  Concrete curb                         OPUS PID:        
LATITUDE:   34°  0.7' N (  34.01111)          LONGITUDE: 118° 29.7' W (-118.49558)


The primary bench mark is a disk set flush in the south curb of a westbound
access road to U.S. Highway 1, 24.08 m (79.0 ft) NW of the centerline of the
Colorado Avenue overpass, 3.96 m (13.0 ft) SW of the centerline of the access
road, 0.21 m (0.7 ft) north of the south end of a concrete guard rail, and 0.18
m (0.6 ft) above street level.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  2 of  7

                                                                                
Station ID: 9410840                         PUBLICATION DATE:  04/21/2003
Name:       SANTA MONICA, PACIFIC OCEAN                       
            CA
NOAA Chart: 18744                           Latitude:   34°  0.5' N (  34.00830)
USGS Quad:  BEVERLY HILLS                   Longitude: 118° 30.0' W (-118.50000)


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


                         BENCH MARK STAMPING:  3 1940
                         DESIGNATION:          941 0840 TIDAL 3

MONUMENTATION:           Tidal Station disk                    VM#:          924
AGENCY:                  US Coast and Geodetic Survey
                         (USC&GS)                              IDB PID#:  EW1586
SETTING CLASSIFICATION:  Concrete curb                         OPUS PID:        
LATITUDE:   34°  0.6' N (  34.01022)          LONGITUDE: 118° 29.8' W (-118.49642)


The bench mark is a disk set in the top of NW curb on the west end of the
Colorado Avenue Bridge, SW of Ocean Avenue where the Bridge connects onto Santa
Monica Municipal Pier, 193 m (632 ft) SW of the centerline of Ocean Avenue, and
2.90 m (9.5 ft) east of the west end of the bridge.



                         BENCH MARK STAMPING:  5 1941
                         DESIGNATION:          941 0840 TIDAL 5

MONUMENTATION:           Tidal Station disk                    VM#:          928
AGENCY:                  US Coast and Geodetic Survey
                         (USC&GS)                              IDB PID#:  EW1593
SETTING CLASSIFICATION:  Concrete wall                         OPUS PID:        
LATITUDE:   34°  0.7' N (  34.01094)          LONGITUDE: 118° 29.5' W (-118.49103)


The bench mark is a disk set in the center at top of the SW concrete wall around
a flower bed on the NW side of the SW entrance to the Santa Monica City Hall,
2.53 m (8.3 ft) NW of the SE end of the wall, 7.01 m (23.0 ft) west of the
center of the entrance doorway, and 0.76 m (2.5 ft) higher than the sidewalk.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  3 of  7

                                                                                
Station ID: 9410840                         PUBLICATION DATE:  04/21/2003
Name:       SANTA MONICA, PACIFIC OCEAN                       
            CA
NOAA Chart: 18744                           Latitude:   34°  0.5' N (  34.00830)
USGS Quad:  BEVERLY HILLS                   Longitude: 118° 30.0' W (-118.50000)


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


                         BENCH MARK STAMPING:  0840 N 1990
                         DESIGNATION:          941 0840 N

MONUMENTATION:           Tidal Station disk                    VM#:          935
AGENCY:                  National Ocean Service (NOS)          IDB PID#:  AH7469
SETTING CLASSIFICATION:  Concrete slab                         OPUS PID#: AH7469
LATITUDE:   34°  0.7' N (  34.01144)          LONGITUDE: 118° 29.7' W (-118.49556)


The bench mark is a disk set in the NE corner of a 2 m x 2 m (7 ft x 6 ft)
concrete slab that supports a cannon in the park along Ocean Avenue, 61 m (200
ft) NW of the centerline of the Colorado Avenue bridge, 12.80 m (42.0 ft) SE of
a drinking fountain, 11.89 m (39.0 ft) NE of a concrete fence that lines the
edge of the park, 0.15 m (0.5 ft) NE of the NE edge of the cannon, and 0.61 m
(2.0 ft) above ground level.



                         BENCH MARK STAMPING:  0840 P 1994
                         DESIGNATION:          941 0840 P

MONUMENTATION:           Tidal Station disk                    VM#:         6768
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Concrete base slab                    OPUS PID:        
LATITUDE:   34°  0.8' N (  34.01389)          LONGITUDE: 118° 29.9' W (-118.49828)


The bench mark is a disk set flush in the concrete base of a Pacific Utilities
Products electrical box located SW of Ocean Boulevard at the base of Santa
Monica Boulevard, 17.71 m (58.1 ft) WSW from the traffic signal pole at the
intersection, 12.22 m (40.1 ft) SE from the NE corner of Will Roger's monument,
and 1.22 m (4.0 ft) north of utility pole with power meter.  

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  4 of  7

                                                                                
Station ID: 9410840                         PUBLICATION DATE:  04/21/2003
Name:       SANTA MONICA, PACIFIC OCEAN                       
            CA
NOAA Chart: 18744                           Latitude:   34°  0.5' N (  34.00830)
USGS Quad:  BEVERLY HILLS                   Longitude: 118° 30.0' W (-118.50000)


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


                         BENCH MARK STAMPING:  0840 Q 1994
                         DESIGNATION:          941 0840 Q

MONUMENTATION:           Tidal Station disk                    VM#:         6769
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Concrete base slab                    OPUS PID:        
LATITUDE:   34°  0.8' N (  34.01333)          LONGITUDE: 118° 29.9' W (-118.49764)


The bench mark is a disk set flush in the eastern corner of the concrete base of
canon monument in Palisades Park, located SW of Ocean Boulevard between Santa
Monica Boulevard and Broadway, 30.51 m (100.1 ft) south of the southern pillar
and visitors information center, 13.62 m (44.7 ft) north of a public viewing
telescope, 9.81 m (32.2 ft) south of a lamp post, and 0.21 m (0.7 ft) above
ground level.



                         BENCH MARK STAMPING:  0840 R 1994
                         DESIGNATION:          941 0840 R

MONUMENTATION:           Tidal Station disk                    VM#:         6770
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Concrete bridge guardrail             OPUS PID:        
LATITUDE:   34°  0.7' N (  34.01194)          LONGITUDE: 118° 29.6' W (-118.49286)


The bench mark is a disk set flush in top of a concrete bridge guard rail, in a
0.61 m x 1.40 m (2.0 ft x 4.6 ft) base at the southern end of the bridge
crossing over Pacific Coast Highway, located on the western side of Main Street,
9.99 m (32.8 ft) west of centerline of Main Street, 8.50 m (27.9 ft) NNE of
yellow fire hydrant, and 1.25 m (4.1 ft) above the sidewalk.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  5 of  7

                                                                                
Station ID: 9410840                         PUBLICATION DATE:  04/21/2003
Name:       SANTA MONICA, PACIFIC OCEAN                       
            CA
NOAA Chart: 18744                           Latitude:   34°  0.5' N (  34.00830)
USGS Quad:  BEVERLY HILLS                   Longitude: 118° 30.0' W (-118.50000)


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


                         BENCH MARK STAMPING:  0840 S 1994
                         DESIGNATION:          941 0840 S

MONUMENTATION:           Tidal Station disk                    VM#:         6777
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Concrete base slab                    OPUS PID:        
LATITUDE:   34°  0.8' N (  34.01253)          LONGITUDE: 118° 29.8' W (-118.49653)


The bench mark is a disk set flush in concrete base of a lightpole near SE
corner of intersection of Broadway and Ocean Avenue, 19.60 m (64.3 ft) east of a
flagpole, 8.56 m (28.1 ft) south of the lightpole at the base of Broadway, and
0.03 m (0.1 ft) NE of NE side of lightpole base.



                         BENCH MARK STAMPING:  0840 T 1995
                         DESIGNATION:          941 0840 T

MONUMENTATION:           Tidal Station disk                    VM#:        12697
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Concrete foundation                   OPUS PID:        
LATITUDE:   34°  0.5' N (  34.00830)          LONGITUDE: 118° 30.0' W (-118.50000)


The bench mark is a disk set flush in a concrete base supporting a storm drain
lid under the Colorado Avenue bridge leading to Santa Monica Pier, 20.80 m (68.2
ft) SE of a stop sign at the corner of Appian Way and entrance leading to the
beach, 10.12 m (33.2 ft) east of yellow fire hydrant at the corner of the
entrance to beach parking north of Colorado Avenue and the boardwalk, 1.80 m
(5.9 ft) north of an electrical box adjacent to the most southern of pillars
supporting bridge.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  6 of  7

                                                                                
Station ID: 9410840                         PUBLICATION DATE:  04/21/2003
Name:       SANTA MONICA, PACIFIC OCEAN                       
            CA
NOAA Chart: 18744                           Latitude:   34°  0.5' N (  34.00830)
USGS Quad:  BEVERLY HILLS                   Longitude: 118° 30.0' W (-118.50000)


                            T I D A L   D A T U M S 


Tidal datums at SANTA MONICA, PACIFIC OCEAN based on:

     LENGTH OF SERIES:      18 Years
     TIME PERIOD:           January 1984 - 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 (11/30/1982)         =  2.590
     MEAN HIGHER HIGH WATER                     MHHW   =  1.653
     MEAN HIGH WATER                            MHW    =  1.428
     MEAN TIDE LEVEL                            MTL    =  0.855
     MEAN SEA LEVEL                             MSL    =  0.849
     MEAN LOW WATER                             MLW    =  0.283
     North American Vertical Datum              NAVD88 =  0.057
     MEAN LOWER LOW WATER                       MLLW   =  0.000
     LOWEST  OBSERVED WATER LEVEL (12/17/1933)         = -0.867

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     TIDAL BM 12 1974                           14.315   12.887
     3 1940                                      7.779    6.351
     5 1941                                     20.328   18.900
     0840 N 1990                                19.093   17.665
     0840 P 1994                                22.065   20.637
     0840 Q 1994                                21.344   19.916
     0840 R 1994                                22.151   20.723
     0840 S 1994                                20.151   18.723
     0840 T 1995                                 5.973    4.545


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

                                                                                
Station ID: 9410840                         PUBLICATION DATE:  04/21/2003
Name:       SANTA MONICA, PACIFIC OCEAN                       
            CA
NOAA Chart: 18744                           Latitude:   34°  0.5' N (  34.00830)
USGS Quad:  BEVERLY HILLS                   Longitude: 118° 30.0' W (-118.50000)


                             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 9410840 Santa Monica, CA

Revised: 08/08/2018
NOAA / National Ocean Service
Web site owner: Center for Operational Oceanographic Products and Services