U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 10
Station ID: 9410170 PUBLICATION DATE: 09/20/2017
Name: SAN DIEGO, SAN DIEGO BAY
CA
NOAA Chart: 18772 Latitude: 32° 42.9' N ( 32.71419)
USGS Quad: POINT LOMA Longitude: 117° 10.4' W (-117.17358)
To reach the tidal bench marks, proceed south on I-5 to 10th Avenue exit
Downtown San Diego, proceed 4 blocks and turn right onto Broadway, proceed 16
blocks and turn left onto North Harbor Drive, then proceed one block to 960
North Harbor Drive which is where the Aircraft Carrier USS MIDWAY is moored.
The tidal bench marks are located in this facility. Tide gauge is located in
room 5A of the south side of the pier adjacent to the USS MIDWAY. To reach the
temp MWWL sensor tide gauge, proceed south on I-5 to 10th Avenue exit Downtown
San Diego, proceed 4 blocks and turn right onto Broadway, proceed 16 blocks and
enter the Broadway Pier. MWWL sensor tide gauge is located on the extreme west
end of the pier
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 12 1926
DESIGNATION: 941 0170 TIDAL 12
MONUMENTATION: Bench Mark disk VM#: 904
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: DC0891
SETTING CLASSIFICATION: Building OPUS PID:
LATITUDE: 32° 42.9' N ( 32.71553) LONGITUDE: 117° 10.4' W (-117.17278)
The primary bench mark is a disk set vertically in the west wall on the bay side
of the Naval Broadway Complex Headquarters Building at the SE corner of the
intersection of Harbor Drive and Broadway, 6.85 m (22.5 ft) north of the north
side of the northernmost doorway along the bay side of the building, 6.63 m
(21.8 ft) south of the fire hydrant on the south curb of Broadway, 2.92 m (9.6
ft) east of the east edge of the sidewalk along the east side of North Harbor
Drive, 0.40 m (1.3 ft) south of the NW corner of the building, and 0.94 m (3.1
ft) above ground level.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 10
Station ID: 9410170 PUBLICATION DATE: 09/20/2017
Name: SAN DIEGO, SAN DIEGO BAY
CA
NOAA Chart: 18772 Latitude: 32° 42.9' N ( 32.71419)
USGS Quad: POINT LOMA Longitude: 117° 10.4' W (-117.17358)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 0170 T 1991
DESIGNATION: 941 0170 T
MONUMENTATION: Tidal Station disk VM#: 106
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete storm drain slab OPUS PID:
LATITUDE: 32° 42.8' N ( 32.71267) LONGITUDE: 117° 10.4' W (-117.17333)
The bench mark is a disk set flush in the SW corner of a 1 x 1 m (3 x 3 ft)
square concrete storm drain near the aircraft carrier USS Midway in a landscaped
area between two sidewalks, 34 m (111 ft) west of the centerline of North Harbor
Drive, 19.51 m (64.0 ft) east of the north-south running sea wall, and 16.00 m
(52.5 ft) north of the centerline of the entrance to the Fish Market Restaurant.
BENCH MARK STAMPING: 0170 V 1991
DESIGNATION: 941 0170 V
MONUMENTATION: Tidal Station disk VM#: 107
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete storm drain slab OPUS PID:
LATITUDE: 32° 42.7' N ( 32.71158) LONGITUDE: 117° 10.4' W (-117.17292)
The bench mark is a disk set flush in the SW corner of a 1 m x 1 m (4 x 4 ft)
square concrete storm drain, 87 m (285 ft) SSE of the USS San Diego WWII
monument, 21.18 m (69.5 ft) west of the west curb of North Harbor Drive, 11.22 m
(36.8 ft) north of a triangular monument cover set in the sidewalk, 8.84 m (29.0
ft) NE of the sea wall, and 7.53 m (24.7 ft) west of concrete lamp pole BL27.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 10
Station ID: 9410170 PUBLICATION DATE: 09/20/2017
Name: SAN DIEGO, SAN DIEGO BAY
CA
NOAA Chart: 18772 Latitude: 32° 42.9' N ( 32.71419)
USGS Quad: POINT LOMA Longitude: 117° 10.4' W (-117.17358)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 0170 X 2009
DESIGNATION: 941 0170 X
MONUMENTATION: Tidal Station disk VM#: 19182
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete bulkhead OPUS PID:
LATITUDE: 32° 42.8' N ( 32.71411) LONGITUDE: 117° 10.4' W (-117.17353)
The benchmark is a disk set in a concrete bulkhead along the USS Midway Museum
pier on North Harbor Drive, 32.21 m (105.7 ft) east of the large bollard on the
pier, 17.41 m (57.1 ft) west of the fire hydrant on the west side of North
Harbor Drive, 10.53 m (34.5 ft) south of the SE corner of the Navy building in
which the tide station is located, 1.95 m (6.4 ft) west of the east end of the
bulkhead, and 0.59 m (1.9 ft) above the walking surface of the pier.
BENCH MARK STAMPING: 0170 AA 2015
DESIGNATION: 941 0170 AA
MONUMENTATION: Metal Rod VM#: 21421
AGENCY: National Ocean Service IDB PID#:
SETTING CLASSIFICATION: Stainless steel rod OPUS PID#: BBFD86
LATITUDE: 32° 42.8' N ( 32.71356) LONGITUDE: 117° 10.4' W (-117.17311)
The bench mark is a 9/16 inch (14 mm) stainless steel rod in the circular
landscaping planter around the aircraft carrier memorial obelisk in the
waterfront park E of the USS Midway, 35.5 m (116.5 ft) NNW of a yellow fire
hydrant on the W side of N Harbor Dr., 14.5 m (47.6 ft) W of the centerline of N
Harbor Dr., 3.5 m (11.5 ft) NE of the aircraft carrier memorial obelisk and 2.0
m (6.6 ft) N of the E light in the circular planter, stainless steel rod is
driven 70.1 ft (21.4 m) to refusal.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 10
Station ID: 9410170 PUBLICATION DATE: 09/20/2017
Name: SAN DIEGO, SAN DIEGO BAY
CA
NOAA Chart: 18772 Latitude: 32° 42.9' N ( 32.71419)
USGS Quad: POINT LOMA Longitude: 117° 10.4' W (-117.17358)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 0170 AB 2015
DESIGNATION: 941 0170 AB
MONUMENTATION: Metal Rod VM#: 21422
AGENCY: National Ocean Service IDB PID#:
SETTING CLASSIFICATION: Stainless steel rod OPUS PID:
LATITUDE: 32° 42.7' N ( 32.71214) LONGITUDE: 117° 10.4' W (-117.17303)
The bench mark is a 9/16 inch (14 mm) stainless steel rod at the N end of a
planter area S of G Street and between N Harbor Dr. and a parking lot, 28.1 m
(92.2 ft) S of the SW portion of the USS San Diego sculpture, 20.1 m (65.9 ft) E
of the sea wall, 13.9 m (45.6 ft) N of storm drain on the E side of the parking
lot, 0.6 m (2.0 ft) S of a metal witness post attached to a 3 hour parking sign
at the entrance to the parking lot, stainless steel rod is driven 76 ft (23.2 m)
to refusal.
BENCH MARK STAMPING: 0170 AC 2015
DESIGNATION: 941 0170 AC
MONUMENTATION: Metal Rod VM#: 21423
AGENCY: National Ocean Service IDB PID#:
SETTING CLASSIFICATION: Stainless steel rod OPUS PID:
LATITUDE: 32° 42.8' N ( 32.71250) LONGITUDE: 117° 10.4' W (-117.17403)
The bench mark is a 9/16 inch (14 mm) stainless steel rod in a planter at the
center of the road entrance to Tuna Harbor Park, 27.4 m (89.9 ft) SSE of the
Clifton A.F. Sprague memorial, 19.5 m (64.0 ft) W of a light post (gl-1) on the
S side of the entrance to Tuna Harbor Park, 5.1 m (16.7 ft) SW of a sewer
manhole cover in the center of the entrance to Tuna Harbor Park and 0.2 m (0.7
ft) E of an orange fiberglass witness post, stainless steel rod is driven 72 ft
(21.9 m) to refusal.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 10
Station ID: 9410170 PUBLICATION DATE: 09/20/2017
Name: SAN DIEGO, SAN DIEGO BAY
CA
NOAA Chart: 18772 Latitude: 32° 42.9' N ( 32.71419)
USGS Quad: POINT LOMA Longitude: 117° 10.4' W (-117.17358)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 0170 AD 2015
DESIGNATION: 941 0170 AD
MONUMENTATION: Survey disk VM#: 21424
AGENCY: National Ocean Service IDB PID#:
SETTING CLASSIFICATION: OPUS PID:
LATITUDE: 32° 42.9' N ( 32.71444) LONGITUDE: 117° 10.2' W (-117.17083)
The bench mark is a disk set flush on the NE corner of a concrete vault with a
green electrical box (d215095) near the SE corner of the intersection of E St.
and the pacific highway, 19.5 m (64.0 ft) S of the centerline of E St. 16.4 m
(53.8 ft) NNW of the NW corner of the office depot building and 3.1 m (10.2 ft)
N of a light post.
BENCH MARK STAMPING: 0170 AE 2015
DESIGNATION: 941 0170 AE
MONUMENTATION: Survey disk VM#: 21425
AGENCY: National Ocean Service IDB PID#:
SETTING CLASSIFICATION: OPUS PID:
LATITUDE: 32° 42.9' N ( 32.71583) LONGITUDE: 117° 10.3' W (-117.17139)
The bench mark is a disk set flush on the NE corner of a concrete vault with a
green electrical box (d208615) on the N side of Broadway near the NW corner of
the intersection of Broadway and the pacific highway, 15 m (49.2 ft) E of a
storm drain on the N side of Broadway, 8.1 m (26.6 ft) W of a traffic light in
the NW corner of the intersection and 7.7 m (25.3 ft) N of the center line of W
bound Broadway.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 10
Station ID: 9410170 PUBLICATION DATE: 09/20/2017
Name: SAN DIEGO, SAN DIEGO BAY
CA
NOAA Chart: 18772 Latitude: 32° 42.9' N ( 32.71419)
USGS Quad: POINT LOMA Longitude: 117° 10.4' W (-117.17358)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 0170 AF 2015
DESIGNATION: 941 0170 AF
MONUMENTATION: Survey disk VM#: 21426
AGENCY: National Ocean Service IDB PID#:
SETTING CLASSIFICATION: Retaining wall OPUS PID:
LATITUDE: 32° 42.9' N ( 32.71472) LONGITUDE: 117° 10.4' W (-117.17333)
The bench mark is a disk set flush on the E end of a concrete bull rail on the N
side of navy pier, 10.4 m (34.1 ft) N of the NE corner of building 11, 7.9 m
(25.9 ft) WNW of a metal electrical box on the waterfront walkway, 1.6 m (5.2
ft) S of the gate entrance to the loading dock for Hornblower cruise ships, 1.1
m (3.6 ft) N of the N rail track on navy pier and 0.6 m (2.0 ft) W of the E end
of the bull rail.
BENCH MARK STAMPING: 0170 AG 2017
DESIGNATION: 941 0170 AG
MONUMENTATION: Tidal Station disk VM#: 22299
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete pier OPUS PID:
LATITUDE: 32° 42.9' N ( 32.71556) LONGITUDE: 117° 10.5' W (-117.17503)
The bench mark is a disk set flush on the South side of Broadway Pier next to a
fire hydrant, 27.3 m (89.6 ft) West of theSE corner of cruiseliner terminal
building, 12.1 m (39.7 ft) East of the South gate, and 9.8 m (32.2 ft) South of
the men's room on ths south side of the cruiseliner terminal building.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 7 of 10
Station ID: 9410170 PUBLICATION DATE: 09/20/2017
Name: SAN DIEGO, SAN DIEGO BAY
CA
NOAA Chart: 18772 Latitude: 32° 42.9' N ( 32.71419)
USGS Quad: POINT LOMA Longitude: 117° 10.4' W (-117.17358)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 0170 AH 2017
DESIGNATION: 941 0170 AH
MONUMENTATION: Tidal Station disk VM#: 22300
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete pier OPUS PID:
LATITUDE: 32° 42.9' N ( 32.71556) LONGITUDE: 117° 10.6' W (-117.17661)
The bench mark is a disk set flush on the SW corner of Broadway Pier, 32.5 m
(106.6 ft) West of the SW corner of cruiseliner terminal building, 19.3 m (63.3
ft) South 0f the temporary tide gauge enclosure, and 7.3 m (24.0 ft) East of the
SW corner of the Broadway Pier.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 8 of 10
Station ID: 9410170 PUBLICATION DATE: 09/20/2017
Name: SAN DIEGO, SAN DIEGO BAY
CA
NOAA Chart: 18772 Latitude: 32° 42.9' N ( 32.71419)
USGS Quad: POINT LOMA Longitude: 117° 10.4' W (-117.17358)
T I D A L D A T U M S
Tidal datums at SAN DIEGO, SAN DIEGO BAY based on:
LENGTH OF SERIES: 19 YEARS
TIME PERIOD: January 1983 - 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 (11/25/2015) = 2.511
MEAN HIGHER HIGH WATER MHHW = 1.745
MEAN HIGH WATER MHW = 1.519
MEAN TIDE LEVEL MTL = 0.902
MEAN SEA LEVEL MSL = 0.896
MEAN LOW WATER MLW = 0.285
North American Vertical Datum NAVD88 = 0.132
MEAN LOWER LOW WATER MLLW = 0.000
LOWEST OBSERVED WATER LEVEL (12/17/1937) = -0.942
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
12 1926 5.170 3.650
0170 T 1991 3.160 1.640
0170 V 1991 2.924 1.405
0170 X 2009 4.373 2.854
0170 AA 2015 4.433 2.914
0170 AB 2015 3.461 1.941
0170 AC 2015 3.010 1.490
0170 AD 2015 4.235 2.716
0170 AE 2015 3.978 2.459
0170 AF 2015 4.391 2.872
0170 AG 2017 3.958 2.438
0170 AH 2017 4.127 2.607
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 9 of 10
Station ID: 9410170 PUBLICATION DATE: 09/20/2017
Name: SAN DIEGO, SAN DIEGO BAY
CA
NOAA Chart: 18772 Latitude: 32° 42.9' N ( 32.71419)
USGS Quad: POINT LOMA Longitude: 117° 10.4' W (-117.17358)
Foot Notes:
Bench marks 0170 AG 2017 and 0170 AH 2017 are based on one differential leveling
connection and do not meet the quality control standards of the NOS. Therefore,
caution should be used when deriving elevations for these marks.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 10 of 10
Station ID: 9410170 PUBLICATION DATE: 09/20/2017
Name: SAN DIEGO, SAN DIEGO BAY
CA
NOAA Chart: 18772 Latitude: 32° 42.9' N ( 32.71419)
USGS Quad: POINT LOMA Longitude: 117° 10.4' W (-117.17358)
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.