U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 8
Station ID: 8775296 PUBLICATION DATE: 05/06/2020
Name: USS LEXINGTON, CORPUS CHRISTI
TX
NOAA Chart: 11309 Latitude: 27° 48.9' N ( 27.81490)
USGS Quad: CORPUS CHRISTI, TX Longitude: 97° 23.4' W ( -97.38920)
To reach the station from the interchange of Interstate 37 and State Highway 358
proceed 7.2 km (4.5 mi) east, merge onto US-181 toward TX-35/Portland for 2.7 km
(1.7 mi), take the exit toward the Texas State Aquarium/USS Lexington for 0.3
km (0.2 mi), travel 0.08 mi (0.1 km) straight on Seagull Boulevard, veer right
onto Burleson Street, drive 0.1 km (0.07 mi) on Burleson Street to the
intersection with Timon Boulevard, turn right onto Timon Boulevard and travel
0.6 km (0.38 mi) until it merges with Surfside Boulevard, proceed on Surfside
Boulevard for 0.3 km (0.17 mi), turn left onto Pearl Avenue, drive 0.1 km (0.06
mi) then turn right onto North Shoreline Boulevard. The bench marks are located
on the walk ramp leading to the USS Lexington and along Pearl Avenue and North
Shoreline Boulevard near the Texas State Aquarium. The station is located on the
concrete pier leading up to the USS Lexington Museum on North Shoreline
Boulevard.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 90008 A 1990
DESIGNATION: 90008 A 1990
MONUMENTATION: Tidal Station disk VM#: 17499
AGENCY: Conrad Blucher Institute (CBI) IDB PID#: AC8425
SETTING CLASSIFICATION: Concrete Seawall OPUS PID:
LATITUDE: 27° 48.9' N ( 27.81436) LONGITUDE: 97° 23.5' W ( -97.39167)
The primary benchmark is a disk set in a concrete seawall located 15.41 m (50.6
ft) SW of the water taxi landing, 14.02 m (46.0 ft) SE of the sidewalk
Intersection, and 6.68 m (21.9 ft) NE of the concrete sidewalk.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 8
Station ID: 8775296 PUBLICATION DATE: 05/06/2020
Name: USS LEXINGTON, CORPUS CHRISTI
TX
NOAA Chart: 11309 Latitude: 27° 48.9' N ( 27.81490)
USGS Quad: CORPUS CHRISTI, TX Longitude: 97° 23.4' W ( -97.38920)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 90008 C 1990
DESIGNATION: 90008 C 1990
MONUMENTATION: Bench Mark disk VM#: 17535
AGENCY: Conrad Blucher Institute IDB PID#: AC8424
SETTING CLASSIFICATION: Stainless steal rod OPUS PID:
LATITUDE: 27° 48.9' N ( 27.81461) LONGITUDE: 97° 23.5' W ( -97.39172)
The bench mark is a disk located 36.8 m (120.7 ft ) northeast of the northeast
corner of the Texas State Aquarium, 7.0 m (23.0 ft) southeast of the center of
an exit driveway from a shuttle bus stop, 4.9 m (16.1 ft ) northwest of the
center of a sidewalk, 2.2 m (7.2 ft ) east of a utility lightpole, and 0.2 m
(0.7 ft) above the level of the driveway, crimped to a stainless steel rod
driven 14.6 m (47.9 ft) to refusal and encased in a 6- inch PVC pipe with
concrete kickblock.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 8
Station ID: 8775296 PUBLICATION DATE: 05/06/2020
Name: USS LEXINGTON, CORPUS CHRISTI
TX
NOAA Chart: 11309 Latitude: 27° 48.9' N ( 27.81490)
USGS Quad: CORPUS CHRISTI, TX Longitude: 97° 23.4' W ( -97.38920)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 90008 D 1990
DESIGNATION: 90008 D 1990
MONUMENTATION: Bench Mark disk VM#: 17536
AGENCY: Conrad Blucher Institute IDB PID#: AC8423
SETTING CLASSIFICATION: Stainless steel rod OPUS PID:
LATITUDE: 27° 48.9' N ( 27.81517) LONGITUDE: 97° 23.5' W ( -97.39161)
The bench mark is a brass disk at the intersection of North Shoreline Boulevard
and Pearl Street in a shrubby area between a curb and sidewalk at the NE end of
a median at a bus stop, located 13.6 m (44.6 ft) NW of the center of the exit
driveway for a shuttle bus stop, 10.1 m (33.1 ft) SE of the center of the
entrance driveway, 7.6 m (24.9 ft) SW of the extended street center, 3.0 m (9.8
ft) NW of the center of a manhole cover, 2.0 m (6.6 ft) NW of the extended
boulevard center, and 0.2 m (0.7 ft) above the level of the street, crimped to a
stainless steal rod driven 17.7 m (56 ft) to refusal, and encased in a 6 inch
PVC and concrete kickblock.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 8
Station ID: 8775296 PUBLICATION DATE: 05/06/2020
Name: USS LEXINGTON, CORPUS CHRISTI
TX
NOAA Chart: 11309 Latitude: 27° 48.9' N ( 27.81490)
USGS Quad: CORPUS CHRISTI, TX Longitude: 97° 23.4' W ( -97.38920)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 90008 E 1990
DESIGNATION: 90008 E 1990
MONUMENTATION: Bench Mark disk VM#: 17537
AGENCY: Conrad Blucher Institute (CBI) IDB PID#: AC8422
SETTING CLASSIFICATION: Stainless steal rod OPUS PID#: AC8422
LATITUDE: 27° 48.9' N ( 27.81564) LONGITUDE: 97° 23.5' W ( -97.39242)
The bench mark is a disk located at the inter section of Surfside Boulevard and
Pearl Street, in a shrubby area between a curb and sidewalk, 16.8 m (55.1 ft) SE
of the Boulevard Center, 12.31 m (40.4 ft) east of the center of a manhole
cover, 6.61 m (21.7 ft) SW of the street center, 1.8 m (5.9 ft) south of a
utility light pole, 0.6 m (2.0ft) NE of the NE edge of a sidewalk, and 0.3 m
(1.0 ft) above the level of the street. The benchmark is crimped to a stainless
steel rod driven 17.1 m (56.1 ft) to refusal and encased in a 6- inch PVC pipe
with concrete kickblock.
BENCH MARK STAMPING: 5296 D 2012
DESIGNATION: 877 5296 D
MONUMENTATION: Bench Mark disk VM#: 20947
AGENCY: Conrad Blucher Institute (CBI) IDB PID:
SETTING CLASSIFICATION: OPUS PID#: BBGF92
LATITUDE: 27° 49.0' N ( 27.81633) LONGITUDE: 97° 23.4' W ( -97.39039)
The bench mark is a disk set into a concrete walkway of the USS Lexington,
located 39.7 m (130.2 ft) NW of "5296 C 2012", 36.9 m (121.1 ft) east of the
road centerline, and 11.4 m (37.4 ft) south of the A4 Skyhawk display.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 8
Station ID: 8775296 PUBLICATION DATE: 05/06/2020
Name: USS LEXINGTON, CORPUS CHRISTI
TX
NOAA Chart: 11309 Latitude: 27° 48.9' N ( 27.81490)
USGS Quad: CORPUS CHRISTI, TX Longitude: 97° 23.4' W ( -97.38920)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 5296 C 2012
DESIGNATION: 877 5296 C
MONUMENTATION: Bench Mark disk VM#: 20948
AGENCY: Conrad Blucher Institute (CBI) IDB PID:
SETTING CLASSIFICATION: OPUS PID#: BBGF91
LATITUDE: 27° 49.0' N ( 27.81600) LONGITUDE: 97° 23.4' W ( -97.38981)
The bench mark is a disk set into a concrete walkway of the USS Lexington 94.3 m
(309.4 ft) NW of "5296 B 2012", 39.7 m (130.2 ft) SE of "5296 D 2012", and 25.62
m (84.1 ft) east of the beginning of the USS Lexington walkway.
BENCH MARK STAMPING: 5296 B 2012
DESIGNATION: 877 5296 B
MONUMENTATION: Bench Mark disk VM#: 20949
AGENCY: Conrad Blucher Institute (CBI) IDB PID:
SETTING CLASSIFICATION: OPUS PID:
LATITUDE: 27° 48.9' N ( 27.81564) LONGITUDE: 97° 23.4' W ( -97.38928)
The bench mark is a disk set into a concrete walkway of the USS Lexington 27.4 m
(89.9 ft) north of "5296 A 2012", 8.83 m (29.0 ft) east of the viewing platform
located next to the walkway, and 6.28 m (20.6 ft) north of access ramp leading
to the USS Lexington.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 8
Station ID: 8775296 PUBLICATION DATE: 05/06/2020
Name: USS LEXINGTON, CORPUS CHRISTI
TX
NOAA Chart: 11309 Latitude: 27° 48.9' N ( 27.81490)
USGS Quad: CORPUS CHRISTI, TX Longitude: 97° 23.4' W ( -97.38920)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 5296 A 2012
DESIGNATION: 877 5296 A
MONUMENTATION: Bench Mark disk VM#: 20950
AGENCY: Conrad Blucher Institute (CBI) IDB PID:
SETTING CLASSIFICATION: OPUS PID#: BBGF90
LATITUDE: 27° 48.9' N ( 27.81539) LONGITUDE: 97° 23.4' W ( -97.38919)
The bench mark is a disk set into a concrete walkway of the USS Lexington 53.4 m
(175.2 ft) north of the Aquatrack Leveling Point, 27.4 m (89.9 ft) south of
"5296 B 2012", and 16.8 m (55.1 ft) NW of the walkway handrail end next to the
USS Lexington.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 7 of 8
Station ID: 8775296 PUBLICATION DATE: 05/06/2020
Name: USS LEXINGTON, CORPUS CHRISTI
TX
NOAA Chart: 11309 Latitude: 27° 48.9' N ( 27.81490)
USGS Quad: CORPUS CHRISTI, TX Longitude: 97° 23.4' W ( -97.38920)
T I D A L D A T U M S
Tidal datums at USS LEXINGTON, CORPUS CHRISTI based on:
LENGTH OF SERIES: 2 YEARS
TIME PERIOD: July 2016 - June 2018
TIDAL EPOCH: 2002-2006
CONTROL TIDE STATION: 8775792 PACKERY CHANNEL
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
HIGHEST OBSERVED WATER LEVEL (10/13/2018) = 0.852
MEAN HIGHER HIGH WATER MHHW = 0.185
MEAN HIGH WATER MHW = 0.180
MEAN SEA LEVEL MSL = 0.106
MEAN TIDE LEVEL MTL = 0.093
MEAN LOW WATER MLW = 0.005
MEAN LOWER LOW WATER MLLW = 0.000
North American Vertical Datum NAVD88 = -0.128
LOWEST OBSERVED WATER LEVEL (01/13/2018) = -0.340
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
90008 A 1990 1.461 1.281
90008 C 1990 1.354 1.174
90008 D 1990 1.065 0.885
90008 E 1990 1.078 0.898
5296 D 2012 0.902 0.722
5296 C 2012 3.321 3.141
5296 B 2012 7.103 6.923
5296 A 2012 8.552 8.372
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 8 of 8
Station ID: 8775296 PUBLICATION DATE: 05/06/2020
Name: USS LEXINGTON, CORPUS CHRISTI
TX
NOAA Chart: 11309 Latitude: 27° 48.9' N ( 27.81490)
USGS Quad: CORPUS CHRISTI, TX Longitude: 97° 23.4' W ( -97.38920)
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.