U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 6
Station ID: 9415218 PUBLICATION DATE: 08/06/2013
Name: MARE IS.NAVAL SHIPYARD,CARQUINEZ STRAIT
CA
NOAA Chart: 18655 Latitude: 38° 4.2' N ( 38.07000)
USGS Quad: MARE ISLAND Longitude: 122° 15.0' W (-122.25000)
To reach the bench marks from I-80 Tennessee Ave exit, proceed west on Tennessee
Avenue to the former Mare Island Naval Ammunitions depot, continue across draw
bridge and turn SE (left) on Asuar Drive, then proceed through new housing
development and past traffic circle, continue past University of Touro and
through first locked cyclone gate to the east, proceed through this gate to
abandoned Coast Guard base. Turn west (right) and proceed to pier 35 then turn
south on to the asphalt road leading to the pier. Tide station is located to the
west side of the main pier entrance.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 5218 L 1976
DESIGNATION: 941 5218 L
MONUMENTATION: Tidal Station disk VM#: 8613
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete pier OPUS PID#: BBBZ81
LATITUDE: 38° 4.2' N ( 38.07000) LONGITUDE: 122° 15.1' W (-122.25200)
The primary bench mark is a disk set flush in the concrete pier 35 at the former
Mare Island Naval Ammo Depot, 14.42 m (47.3 ft) south of the SW corner of
building A-194, 7.92 m (26.0 ft) SE of the land end of the pier, 0.37 m (1.2 ft)
NNE of the west side of the pier.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 6
Station ID: 9415218 PUBLICATION DATE: 08/06/2013
Name: MARE IS.NAVAL SHIPYARD,CARQUINEZ STRAIT
CA
NOAA Chart: 18655 Latitude: 38° 4.2' N ( 38.07000)
USGS Quad: MARE ISLAND Longitude: 122° 15.0' W (-122.25000)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 5218 K 1976
DESIGNATION: 941 5218 K TIDAL
MONUMENTATION: Tidal Station disk VM#: 8612
AGENCY: National Ocean Survey (NOS) IDB PID#: JT9537
SETTING CLASSIFICATION: Pavement OPUS PID:
LATITUDE: 38° 4.5' N ( 38.07500) LONGITUDE: 122° 15.0' W (-122.25000)
The bench mark is a disk set flush in the sidewalk at the former Mare Island
Naval Ammo Depot, 8.69 m (28.5 ft) north of the NW corner of a truck scale, 1.80
m (5.9 ft) west of the north corner of the weigh station building, and 0.61 m
(2.0 ft) NE of the south corner of weigh station A-292.
BENCH MARK STAMPING: U 466 1950
DESIGNATION: U 466
MONUMENTATION: Bench Mark disk VM#: 8614
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: JT0318
SETTING CLASSIFICATION: Concrete wall OPUS PID:
LATITUDE: 38° 4.6' N ( 38.07669) LONGITUDE: 122° 15.0' W (-122.25000)
The bench mark is a disk set vertically in the SW concrete wall of building
A-228, 1.65 m (5.4 ft) NW of the NW edge of the NW most window on the SW wall
of the building, 0.27 m (0.9 ft) SE of the west corner of the building, and
0.70 m (2.3 ft) above the surface of the pavement.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 6
Station ID: 9415218 PUBLICATION DATE: 08/06/2013
Name: MARE IS.NAVAL SHIPYARD,CARQUINEZ STRAIT
CA
NOAA Chart: 18655 Latitude: 38° 4.2' N ( 38.07000)
USGS Quad: MARE ISLAND Longitude: 122° 15.0' W (-122.25000)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: PT OLSON
DESIGNATION: 941 5218 PT OLSON
MONUMENTATION: Tidal Station disk VM#: 13419
AGENCY: US Army Corps of Engineers (USE) IDB PID#:
SETTING CLASSIFICATION: Concrete wharf OPUS PID:
LATITUDE: ' °deg (0) LONGITUDE: ' °deg (0)
The bench mark is a disk set flush in the concrete wharf deck at the north end
of the wharf east of the USCG building A-228, 16.03 m (52.6 ft) east of a yellow
fire hydrant across from building A-8, 2.99 m (9.8 ft) south of the south edge
of a large light pole at the north end of the wharf, 3.81 m (12.5 ft) west of
the east face of the wharf.
BENCH MARK STAMPING: 5218 R 2006
DESIGNATION: 941 5218 R
MONUMENTATION: Tidal Station disk VM#: 18066
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete vault OPUS PID#: BBCN57
LATITUDE: 38° 4.4' N ( 38.07297) LONGITUDE: 122° 15.2' W (-122.25275)
The bench mark is a disk set flush in a concrete slab for a sewer vault
adjacent to a sewage pump station in the northeast end of field shoreward of
pier 35 at former Mare Island Naval Ammo Depot, 33.40 m (109.6 ft) SE of the
northern most orange witness post located along the east side of the causeway
leading to pier 35, 23.72 m (77.8 ft) NE of the southern most orange witness
post located along the east side of the causeway leading to pier 35, 23.23 m
(76.2 ft) east from the centerline of the causeway leading to pier 35, and 3.86
m (12.7) west of the electrical panel of the pump station.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 6
Station ID: 9415218 PUBLICATION DATE: 08/06/2013
Name: MARE IS.NAVAL SHIPYARD,CARQUINEZ STRAIT
CA
NOAA Chart: 18655 Latitude: 38° 4.2' N ( 38.07000)
USGS Quad: MARE ISLAND Longitude: 122° 15.0' W (-122.25000)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 5218 P 2006
DESIGNATION: 941 5218 P
MONUMENTATION: Tidal Station disk VM#: 18067
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete deck OPUS PID:
LATITUDE: 38° 4.2' N ( 38.06939) LONGITUDE: 122° 15.1' W (-122.25194)
The bench mark is a disk set flush in the concrete deck of pier 35 at the former
Mare Island Naval Ammo Depot, 10.60 m (34.8 ft) east of northeastern most light
stanchion, 5.65 m (18.5 ft) east of northeastern most double bollard, and 0.75 m
(2.5 ft) south of north edge of concrete pier face.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 6
Station ID: 9415218 PUBLICATION DATE: 08/06/2013
Name: MARE IS.NAVAL SHIPYARD,CARQUINEZ STRAIT
CA
NOAA Chart: 18655 Latitude: 38° 4.2' N ( 38.07000)
USGS Quad: MARE ISLAND Longitude: 122° 15.0' W (-122.25000)
T I D A L D A T U M S
Tidal datums at MARE IS.NAVAL SHIPYARD,CARQUINEZ STRAIT based on:
LENGTH OF SERIES: 6 YEARS
TIME PERIOD: October 2006 - September 2012
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 (12/22/1996) = 2.350
MEAN HIGHER HIGH WATER MHHW = 1.755
MEAN HIGH WATER MHW = 1.583
MEAN TIDE LEVEL MTL = 0.937
MEAN SEA LEVEL MSL = 0.936
MEAN LOW WATER MLW = 0.292
MEAN LOWER LOW WATER MLLW = 0.000
North American Vertical Datum NAVD88 = -0.110
LOWEST OBSERVED WATER LEVEL (06/06/2012) = -0.613
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
5218 L 1976 3.375 1.792
5218 K 1976 3.752 2.169
U 466 1950 4.276 2.693
PT OLSON 3.411 1.828
5218 R 2006 3.795 2.212
5218 P 2006 3.411 1.828
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 6
Station ID: 9415218 PUBLICATION DATE: 08/06/2013
Name: MARE IS.NAVAL SHIPYARD,CARQUINEZ STRAIT
CA
NOAA Chart: 18655 Latitude: 38° 4.2' N ( 38.07000)
USGS Quad: MARE ISLAND Longitude: 122° 15.0' W (-122.25000)
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.