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Bench Mark Sheet for 9415056, Pinole Point, San Pablo Bay 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Superseded Epoch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Small blue map location marker Unpublished bench mark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: 9415056                         PUBLICATION DATE:  06/30/2014
Name:       PINOLE POINT, SAN PABLO BAY                       
            CA
NOAA Chart: 18654                           Latitude:   38°  0.9' N (  38.01500)
USGS Quad:  SAN QUENTIN                     Longitude: 122° 21.8' W (-122.36300)


To reach the tidal bench marks from Berkeley, proceed north on Highway 80 to El
Cerrito, then proceed west on Cutting Boulevard to 23rd Street, then turn right
and proceed north on 23rd Street/San Pablo Avenue for 8.9 km (5.5 mi) to
Richmond Parkway, then turn left and proceed west on Richmond Parkway for 400 m
(1300 ft), then turn right and proceed NW on Atlas Road to the Point Pinole
Regional Park, and continue to the paved road in the park to where there is a
fishing pier and ruins of the Atlas Powder Company pier.  The bench marks are
located in the park, along the road leading to the pier.  The tide gage and
staff were located 137 m (450 ft) from the shore on a piling among the ruins of
the powder company pier.


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


                 PRIMARY BENCH MARK STAMPING:  5056 A 1976
                         DESIGNATION:          941 5056 A TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         8514
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:        
SETTING CLASSIFICATION:  Copper-clad steel rod                 OPUS PID#: BBCN55
LATITUDE:   38°  0.7' N (  38.01164)          LONGITUDE: 122° 21.9' W (-122.36419)


The primary bench mark is a disk located 183 m (600 ft) E of a magazine, 23 m
(75 ft) SW of Sandy Beach, 21 m (69 ft) SE of the concrete at the S end of Point
Pinole pier, 6 m (21 ft) NE of the top of an embankment overlooking the mark,
and 1 m (4 ft) ENE of a witness post.  The bench mark is set 0.21 m (0.7 ft)
above the grade, crimped to the top of a copper-clad steel rod driven 12.2 m (40
ft) to substantial resistance and encased in a PVC pipe.

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

                                                                                
Station ID: 9415056                         PUBLICATION DATE:  06/30/2014
Name:       PINOLE POINT, SAN PABLO BAY                       
            CA
NOAA Chart: 18654                           Latitude:   38°  0.9' N (  38.01500)
USGS Quad:  SAN QUENTIN                     Longitude: 122° 21.8' W (-122.36300)


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


                         BENCH MARK STAMPING:  5056 B 1976
                         DESIGNATION:          941 5056 B TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         8515
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:        
SETTING CLASSIFICATION:  Copper-clad steel rod                 OPUS PID:        
LATITUDE:   38°  0.7' N (  38.01108)          LONGITUDE: 122° 21.8' W (-122.36406)


The bench mark is a disk located 123 m (405 ft) NNE of a square concrete slab,
122 m (400 ft) NE of a magazine, 77 m (253 ft) NE of chemical toilets on a
concrete slab, 62 m (205 ft) SSE of bench mark 5056 A 1976, 20 m (66 ft) WSW of
the inshore end of the beach, and 1.04 m (3.4 ft) WSW of a witness post.  The
bench mark is set 0.21 m (0.7 ft) above grade, crimped to the top of a
copper-clad steel rod driven 7.3 m (24 ft) to substantial resistance and encased
in a PVC pipe.



                         BENCH MARK STAMPING:  5056 D 1976
                         DESIGNATION:          941 5056 D TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         8517
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:        
SETTING CLASSIFICATION:  Copper-clad steel rod                 OPUS PID:        
LATITUDE:   38°  0.5' N (  38.00853)          LONGITUDE: 122° 21.9' W (-122.36514)


The bench mark is a disk located 229 m (750 ft) SE of a water tank on a knoll
above a magazine, 137 m (450 ft) SSE of bench mark 5056 C 1976, 102 m (336 ft)
WNW of yellow brick kilns in a brick wall, 45 m (148 ft) WSW of a paved road,
1.37 m (4.5 ft) SE of a witness post, and 0.24 m (0.8 ft) above the grade.  The
bench mark is crimped to the top of a copper-clad steel rod driven 7.6 m (25 ft)
to substantial resistance and encased in a PVC pipe.

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

                                                                                
Station ID: 9415056                         PUBLICATION DATE:  06/30/2014
Name:       PINOLE POINT, SAN PABLO BAY                       
            CA
NOAA Chart: 18654                           Latitude:   38°  0.9' N (  38.01500)
USGS Quad:  SAN QUENTIN                     Longitude: 122° 21.8' W (-122.36300)


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


                         BENCH MARK STAMPING:  POINT PINOLE 4 1940/1977
                         DESIGNATION:          941 5056 POINT PINOLE 4 R

MONUMENTATION:           Bench Mark disk                       VM#:        20353
AGENCY:                  National Geodetic Survey (NGS)        IDB PID#:  JT2895
SETTING CLASSIFICATION:  Concrete monument                     OPUS PID#: JT2895
LATITUDE:   38°  0.7' N (  38.01156)          LONGITUDE: 122° 22.0' W (-122.36675)


To reach the benchmark from the S end of the Point Pinole fishing pier, proceed
SSW along the access road for 165 m (543 ft) to an intersection, then go WNW for
212 m (695 ft) to the station which is on a bluff W of the road



                         BENCH MARK STAMPING:  POINT PINOLE 4 No. 5 1940/1977

MONUMENTATION:           Bench Mark disk                       VM#:        20354
AGENCY:                  National Geodetic Survey              IDB PID#:  JT0568
SETTING CLASSIFICATION:  Concrete monument                     OPUS PID:        
LATITUDE:   38°  0.7' N (  38.01172)          LONGITUDE: 122° 22.0' W (-122.36664)


The bench mark is a disk set in the top of a concrete post located on a bluff at
the southwest side of Pinole Point, 17.98 m (59 ft) SW of the SW corner of a pit
for Magazine 85, 13.78 m (45.2 ft) NE of Point Pinole 4 Triangulation Station,
10.36 m (34 ft) S of the edge of the bluff, 1.37 m (4.5 ft) NE of the NE edge of
a firebreak and projects 0.12 m (0.4 ft) above the ground.

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

                                                                                
Station ID: 9415056                         PUBLICATION DATE:  06/30/2014
Name:       PINOLE POINT, SAN PABLO BAY                       
            CA
NOAA Chart: 18654                           Latitude:   38°  0.9' N (  38.01500)
USGS Quad:  SAN QUENTIN                     Longitude: 122° 21.8' W (-122.36300)


                            T I D A L   D A T U M S 


Tidal datums at PINOLE POINT, SAN PABLO BAY based on:

     LENGTH OF SERIES:      3 MONTHS
     TIME PERIOD:           December 2010 - February 2011
     TIDAL EPOCH:           1983-2001
     CONTROL TIDE STATION:  9414863 RICHMOND, CHEVRON OIL PIER


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

     MEAN HIGHER HIGH WATER                     MHHW   =  1.902
     MEAN HIGH WATER                            MHW    =  1.721
     MEAN TIDE LEVEL                            MTL    =  1.027
     MEAN SEA LEVEL                             MSL    =  1.014
     MEAN LOW WATER                             MLW    =  0.332
     North American Vertical Datum              NAVD88 =  0.019
     MEAN LOWER LOW WATER                       MLLW   =  0.000

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     5056 A 1976                                 2.232    0.511
     5056 B 1976                                 6.394    4.673
     5056 D 1976                                12.151   10.430
     POINT PINOLE 4 1940/1977                   20.946   19.225
     POINT PINOLE 4 No. 5 1940/1977             19.735   18.014


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

                                                                                
Station ID: 9415056                         PUBLICATION DATE:  06/30/2014
Name:       PINOLE POINT, SAN PABLO BAY                       
            CA
NOAA Chart: 18654                           Latitude:   38°  0.9' N (  38.01500)
USGS Quad:  SAN QUENTIN                     Longitude: 122° 21.8' W (-122.36300)


                             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 9415056 Pinole Point, San Pablo Bay, CA

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