U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 4
PUBLICATION DATE: 04/18/1984
Station ID: 8729868 SUPERCEDED DATE: 04/21/2003
Name: PENSACOLA NAVAL AIR STATION, PENSACOLA BAY
FLORIDA
NOAA Chart: 11382 Latitude: 30° 20.7' N
USGS Quad: FORTBARRANCAS Longitude: 87° 16.4' W
To reach the tidal bench marks from the main entrance to the Pensacola Naval Air
Station, proceed 1.45 miles (2.33 km) SE on Murry Boulevard to Saufley Street,
0.3 miles (0.5 km) east on Saufley Street to East Avenue, 0.3 miles (0.5 km)
south on East Avenue to Dallas Avenue, then 0.25 mile (0.40 km) west on Dallas
Avenue to Building No. 75 on the south side of Dallas Avenue. The bench marks
are located in area along Dallas Avenue and the sea wall. The tide gage and
staff were located on a concrete dock south of building No. 75.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 7.792 K9 1918
MONUMENTATION: Survey Disk VM#: 10281
AGENCY: PID#: BG1813
SETTING CLASSIFICATION: Concrete Wall
The bench mark is set vertically in the west face of a brick wall between Jayne
Avenue and West Avenue, 61.5 (18.7 m) east and across Jayne Avenue from the SE
corner of building No. 216, 38 feet (12 m) north of the centerline of Dallas
Street and 21 feet (6 m) east of the centerline of Jayne Avenue. The bench mark
is 1 foot (0.3 m) above ground level.
BENCH MARK STAMPING: 7.507 L9 1918
MONUMENTATION: Survey Disk VM#: 10282
AGENCY: PID#: BG1814
SETTING CLASSIFICATION: Concrete Foundation
The bench mark is set vertically in the north face of buildin No. 27, 300 feet
(91 m) SSE of the junction of South Avenue and West Avenue, 255 feet (78 m)
south of the centerline of South Avenue, and 0.9 foot (0.3 m) west of the NE
corner of building No. 27. The bench mark is 2 feet (1 m) above the level of
the pavement.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 4
PUBLICATION DATE: 04/18/1984
Station ID: 8729868 SUPERCEDED DATE: 04/21/2003
Name: PENSACOLA NAVAL AIR STATION, PENSACOLA BAY
FLORIDA
NOAA Chart: 11382 Latitude: 30° 20.7' N
USGS Quad: FORTBARRANCAS Longitude: 87° 16.4' W
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: NO 1 1934
MONUMENTATION: Survey Disk VM#: 10283
AGENCY: PID#: BG1815
SETTING CLASSIFICATION: Concrete Curb
The bench mark is located in top of a concrete curbing of south foundation of
building No. 71, 285 feet (87 m) south of the centerline of South Avenue and 30
feet (9 m) north of sea wall on north shore of Pensacola Bay. The bench mark is
0.5 foot (0.2 m) above level of pavement.
BENCH MARK STAMPING: B 161 1955
MONUMENTATION: Survey Disk VM#: 10284
AGENCY: PID#: BG1810
SETTING CLASSIFICATION: Concrete Pillar
The bench mark is at the junction of Fisher Avenue and Dallas Street, set
vertically in the west face of a large concrete pillar at the SW corner of porch
of building No. 624, on the south side of the building, and 1 foot (0.3 m) north
of the SW corner of the porch. The bench mark is 1.8 feet (0.5 m) above ground
level.
BENCH MARK STAMPING: C 161 1955
MONUMENTATION: Survey Disk VM#: 10285
AGENCY: PID#: BG1809
SETTING CLASSIFICATION: Concrete Foundation
The bench mark is set vertically in the north face of the concrete foundation of
building No. 632, 18 feet (5 m) south of the south curb of Dallas Street and 1.5
feet (0.5 m) west of the NE corner of the building. The bench mark is 2 feet (1
m) above ground level.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 4
PUBLICATION DATE: 04/18/1984
Station ID: 8729868 SUPERCEDED DATE: 04/21/2003
Name: PENSACOLA NAVAL AIR STATION, PENSACOLA BAY
FLORIDA
NOAA Chart: 11382 Latitude: 30° 20.7' N
USGS Quad: FORTBARRANCAS Longitude: 87° 16.4' W
T I D A L D A T U M S
Tidal datums at PENSACOLA NAVAL AIR STATION, PENSACOLA BAY based on:
LENGTH OF SERIES: 4 MONTHS
TIME PERIOD: MARCH-JUNE 1977
TIDAL EPOCH: 1960-1978
CONTROL TIDE STATION: 8729840 PENSACOLA
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in FEET:
HIGHEST OBSERVED WATER LEVEL (03/28/1977) = 2.16
MEAN HIGHER HIGH WATER MHHW = 1.20
MEAN HIGH WATER MHW = 1.17
MEAN TIDE LEVEL MTL = 0.60
* NATIONAL GEODETIC VERTICAL DATUM NGVD29 = 0.21
MEAN LOW WATER MLW = 0.04
MEAN LOWER LOW WATER MLLW = 0.00
LOWEST OBSERVED WATER LEVEL (03/01/1977) = -1.18
* NGVD reference based on elevations published in Quad 300872, 1967, and NOS
leveling of 1977.
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In FEET above:
Stamping or Designation MLLW MHW
7.792 K9 1918 8.02 6.85
7.507 L9 1918 7.72 6.55
NO 1 1934 5.29 4.12
B 161 1955 12.39 11.22
C 161 1955 11.65 10.48
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 4
PUBLICATION DATE: 04/18/1984
Station ID: 8729868 SUPERCEDED DATE: 04/21/2003
Name: PENSACOLA NAVAL AIR STATION, PENSACOLA BAY
FLORIDA
NOAA Chart: 11382 Latitude: 30° 20.7' N
USGS Quad: FORTBARRANCAS Longitude: 87° 16.4' W
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 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.