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Bench Mark Sheet for 9415102, Martinez-Amorco Pier 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Superseded Epoch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Small blue map location marker Unpublished bench mark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  6

                                                                                
Station ID: 9415102                         PUBLICATION DATE:  07/25/2018
Name:       MARTINEZ-AMORCO PIER, CARQUINEZ STRAIT            
            CA
NOAA Chart: 18657                           Latitude:   38°  2.1' N (  38.03464)
USGS Quad:  BENICIA                         Longitude: 122°  7.5' W (-122.12519)


To reach the tidal bench marks from Concord, CA, go north on Interstate 680 to
the Marina Vista Drive exit (# 56, last exit before toll bridge over Sacramento
River).  Turn left (west) on Marina Vista Drive and proceed 1.3 km (0.8 mi) to
Amorco road on the right.  This is a private road and not well marked.  Cross
the railroad tracks and under the railroad overpass to continue right on Amorco
Road, proceed 1.3 km (0.8 mi) to a parking lot and guard station.  Continue out
the wharf to the Operators office where you must sign in.  Proceed on foot to
the far west end of the wharf and the tide station is on the NW corner.


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


                 PRIMARY BENCH MARK STAMPING:  5102 D 2013
                         DESIGNATION:          941 5102 D

MONUMENTATION:           Metal Rod                             VM#:        20716
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Stainless steel rod in sleeve         OPUS PID#: BBCZ49
LATITUDE:   38°  2.0' N (  38.03256)          LONGITUDE: 122°  7.2' W (-122.11947)


The primary bench mark is a metal rod located at the SW corner of the pier
parking lot, south of the guard station, 7.31 m (24.0 ft) south of south edge of
concrete walkway, 1.35 m (4.4 ft) NNE of SE fence corner, 1.87 m (6.1 ft) west
of back of west curb around the parking lot. The datum point is set 9.0 cm (3.5
in) below ground, being the top of a stainless steel rod driven 409 m (16 ft) to
refusal and encased in a 5-inch NOS logo cap.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  2 of  6

                                                                                
Station ID: 9415102                         PUBLICATION DATE:  07/25/2018
Name:       MARTINEZ-AMORCO PIER, CARQUINEZ STRAIT            
            CA
NOAA Chart: 18657                           Latitude:   38°  2.1' N (  38.03464)
USGS Quad:  BENICIA                         Longitude: 122°  7.5' W (-122.12519)


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


                         BENCH MARK STAMPING:  5102 A 2013
                         DESIGNATION:          941 5102 A
                         ALIAS:                Met SRM

MONUMENTATION:           Tidal Station disk                    VM#:        20717
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Large concrete pier                   OPUS PID:        
LATITUDE:   38°  2.1' N (  38.03469)          LONGITUDE: 122°  7.5' W (-122.12514)


The bench mark is a disk set flush in the concrete pier deck located at west end
of Amorco pier, SE of the tide station, 7.56 m (24.8 ft) west of the east edge
of concrete, 2.59 m (8.5 ft) east of the meteorological sensor mast, and 2.41 m
(7.9 ft) south of the side looking current meter I-beam.



                         BENCH MARK STAMPING:  5102 B 2013
                         DESIGNATION:          941 5102 B

MONUMENTATION:           Tidal Station disk                    VM#:        20718
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Large concrete pier                   OPUS PID:        
LATITUDE:   38°  2.1' N (  38.03461)          LONGITUDE: 122°  7.5' W (-122.12428)


The bench mark is a disk set flush in the SE corner of a concrete mooring hook
pier located to the west of Amorco pier, 1.56 m (5.1 ft) east of a navigation
light pole, 0.46 m (1.5 ft) north of south side of the pier, and 0.5 m (1.6 ft)
west of east side of the pier.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  3 of  6

                                                                                
Station ID: 9415102                         PUBLICATION DATE:  07/25/2018
Name:       MARTINEZ-AMORCO PIER, CARQUINEZ STRAIT            
            CA
NOAA Chart: 18657                           Latitude:   38°  2.1' N (  38.03464)
USGS Quad:  BENICIA                         Longitude: 122°  7.5' W (-122.12519)


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


                         BENCH MARK STAMPING:  5102 C 2013
                         DESIGNATION:          941 5102 C

MONUMENTATION:           Tidal Station disk                    VM#:        20719
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Concrete bollard foundation           OPUS PID:        
LATITUDE:   38°  2.0' N (  38.03314)          LONGITUDE: 122°  7.2' W (-122.11978)


The bench mark is a disk set flush in a concrete foundation for a guard pole
located at the outside of the curve where Amorco Road meets the pier, 7.98 m
(26.2 ft) east of the east end of the pier, 8.96 m (29.4 ft) NE of the SE corner
of the smokers shack, and 4.2 m (13.8 ft) west of north end of a jersey barrier.



                         BENCH MARK STAMPING:  5102 E 2013
                         DESIGNATION:          941 5102 E

MONUMENTATION:           Metal Rod                             VM#:        20720
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Stainless steel rod in sleeve         OPUS PID:        
LATITUDE:   38°  1.9' N (  38.03208)          LONGITUDE: 122°  7.2' W (-122.11961)


The bench mark is located on east side of the Amorco access road, 22.7 m (74.5
ft) SSE of a surveillance camera pole, 2.82 m (9.3 ft) east of east edge of
road, and 1.4 m (4.6 ft) west of a cyclone fence. The datum point is a set 9.0
cm (3.5 in) below ground, being the top of a stainless steel rod driven 5.9 m
(19.5 ft) to refusal and encased in a 5-inch NOS logo cap.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  4 of  6

                                                                                
Station ID: 9415102                         PUBLICATION DATE:  07/25/2018
Name:       MARTINEZ-AMORCO PIER, CARQUINEZ STRAIT            
            CA
NOAA Chart: 18657                           Latitude:   38°  2.1' N (  38.03464)
USGS Quad:  BENICIA                         Longitude: 122°  7.5' W (-122.12519)


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


                         BENCH MARK STAMPING:  5102 F 2013
                         DESIGNATION:          941 5102 F

MONUMENTATION:           Metal Rod                             VM#:        20721
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Stainless steel rod in sleeve         OPUS PID:        
LATITUDE:   38°  1.9' N (  38.03142)          LONGITUDE: 122°  7.2' W (-122.11969)


The bench mark is located on the east side of the Amorco access road, 23.01 m
(75.5 ft) NE of a red riser with valves, 11.86 m (38.9 ft) SE of a large yellow
painted valve in a pipeline, 2.97 m (9.7 ft) east of west edge of road, and 1.16
m (3.8 ft) west of a cyclone fence. The datum point is set 9.0 cm (3.5 in) below
ground, being the top of a stainless steel rod driven 5.5 m (18 ft) to refusal
and encased in a 5-inch NOS logo cap.



                         BENCH MARK STAMPING:  5102 G 2013
                         DESIGNATION:          941 5102 G

MONUMENTATION:           Metal Rod                             VM#:        20722
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Stainless steel rod in sleeve         OPUS PID:        
LATITUDE:   38°  1.8' N (  38.03067)          LONGITUDE: 122° 20.2' W (-122.33653)


The bench mark is located on the east side of the Amorco access road, 27.77 m
(91.1 ft) north of the north edge of a gate in a cyclone fence, 13.0 m (42.7 ft)
east of a petroleum pipeline warning sign, 2.39 m (7.8 ft) east of edge of road,
and 1.04 m (3.4 ft) west of a cyclone fence. The datum point is below the
ground, being the top of a stainless steel rod driven 5.6 m (18.5 ft) to refusal
and encased in a 5-inch NOS logo cap.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  5 of  6

                                                                                
Station ID: 9415102                         PUBLICATION DATE:  07/25/2018
Name:       MARTINEZ-AMORCO PIER, CARQUINEZ STRAIT            
            CA
NOAA Chart: 18657                           Latitude:   38°  2.1' N (  38.03464)
USGS Quad:  BENICIA                         Longitude: 122°  7.5' W (-122.12519)


                            T I D A L   D A T U M S 


Tidal datums at MARTINEZ-AMORCO PIER, CARQUINEZ STRAIT based on:

     LENGTH OF SERIES:      3 YEARS
     TIME PERIOD:           Mar 2014 - Feb 2015 and Nov 2015 - Oct 2017
     TIDAL EPOCH:           1983-2001
     CONTROL TIDE STATION:  9415144 PORT CHICAGO, SUISUN BAY


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

     HIGHEST OBSERVED WATER LEVEL (01/12/2017)         =  2.341
     MEAN HIGHER HIGH WATER                     MHHW   =  1.637
     MEAN HIGH WATER                            MHW    =  1.479
     MEAN TIDE LEVEL                            MTL    =  0.874
     MEAN SEA LEVEL                             MSL    =  0.874
     MEAN LOW WATER                             MLW    =  0.268
     MEAN LOWER LOW WATER                       MLLW   =  0.000
     LOWEST  OBSERVED WATER LEVEL (12/05/2017)         = -0.311

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     5102 D 2013                                 9.312    7.833
     5102 A 2013                                 4.917    3.438
     5102 B 2013                                 4.391    2.912
     5102 C 2013                                 4.415    2.936
     5102 E 2013                                 7.241    5.762
     5102 F 2013                                 6.401    4.922
     5102 G 2013                                 6.141    4.662


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

                                                                                
Station ID: 9415102                         PUBLICATION DATE:  07/25/2018
Name:       MARTINEZ-AMORCO PIER, CARQUINEZ STRAIT            
            CA
NOAA Chart: 18657                           Latitude:   38°  2.1' N (  38.03464)
USGS Quad:  BENICIA                         Longitude: 122°  7.5' W (-122.12519)


                             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 9415102 Martinez-Amorco Pier, CA

Revised: 10/15/2013
NOAA / National Ocean Service
Web site owner: Center for Operational Oceanographic Products and Services