U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 5
Station ID: 8728912 PUBLICATION DATE: 02/08/2005
Name: PORT ST. JOE
FL
NOAA Chart: 11389 Latitude: 29° 48.9' N ( 29.81500)
USGS Quad: PORT ST. JOE Longitude: 85° 18.8' W ( -85.31330)
To reach the tidal bench marks from the intersection of State Route 71 and U.S.
Highway 98 in Port St. Joe, proceed north on U.S. Highway 98 for 0.6 km (0.4
mi) to the paved road leading west to the St. Joe Paper Company wharf, then west
on the paved road to its end at the wharf. The bench marks are on the St. Joe
Paper Company property and along the highway. The tide gage and staff were
located at the wharf.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: NO 1 1975
MONUMENTATION: Tidal Station disk VM#: 9900
AGENCY: National Ocean Survey (NOS) IDB PID#: AS0304
SETTING CLASSIFICATION: Concrete bulkhead OPUS PID:
LATITUDE: 29° 49.1' N ( 29.81830) LONGITUDE: 85° 18.7' W ( -85.31170)
The primay bench mark is a disk set in top of the concrete bulkhead at the
wharf, 18.23 m (59.8 ft) west of the SW corner of warehouse #3, 13.23 m (43.4
ft) SW of Fire Control Box #34, and 0.34 m (1.1 ft) east of the west edge of the
bulkhead.
BENCH MARK STAMPING: NO 2 1975
MONUMENTATION: Tidal Station disk VM#: 9901
AGENCY: National Ocean Survey (NOS) IDB PID#: AS0305
SETTING CLASSIFICATION: Concrete valve box OPUS PID:
LATITUDE: 29° 49.1' N ( 29.81830) LONGITUDE: 85° 18.7' W ( -85.31170)
The bench mark is a disk set in the SW corner of a concrete valve box, 21.55 m
(70.7 ft) SW of the SW corner of the Container Corporation building, 16 m (53
ft) NE of a light pole, 16 m (52.0 ft) north of and across the road from the
north rail of the railroad tracks, and 12 m (38 ft) SW of the SW rail of a
railroad spur line.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 5
Station ID: 8728912 PUBLICATION DATE: 02/08/2005
Name: PORT ST. JOE
FL
NOAA Chart: 11389 Latitude: 29° 48.9' N ( 29.81500)
USGS Quad: PORT ST. JOE Longitude: 85° 18.8' W ( -85.31330)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: NO 3 1975
MONUMENTATION: Tidal Station disk VM#: 9902
AGENCY: National Ocean Survey (NOS) IDB PID#: AS0306
SETTING CLASSIFICATION: Concrete steps OPUS PID:
LATITUDE: 29° 49.0' N ( 29.81670) LONGITUDE: 85° 18.6' W ( -85.31000)
The bench mark is a disk set in the steps of the Container Corporation building,
25.69 m (84.3 ft) north of a fence, 22.34 m (73.3 ft) north of and across the
road from the north rail of the railroad track, and 2.83 m (9.3 ft) south of the
south wall of the building.
BENCH MARK STAMPING: NO 4 1975
MONUMENTATION: Tidal Station disk VM#: 9903
AGENCY: National Ocean Survey (NOS) IDB PID#: AS0307
SETTING CLASSIFICATION: Concrete box drain OPUS PID:
LATITUDE: 29° 49.0' N ( 29.81670) LONGITUDE: 85° 18.3' W ( -85.30500)
The bench mark is a disk set in the SW corner of a concrete box drain, 14.63 m
(48.0 ft) SW of the centerline of U.S. Highway 98, 6.86 m (22.5 ft) SE of the
south rail of railroad tracks, 4 m (13 ft) NW of telephone pole #22, 2 m (7 ft)
NE of the edge of the sidewalk, 0.3 m (1 ft) west of a witness post, and 6 cm
(0.2 ft) below ground level.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 5
Station ID: 8728912 PUBLICATION DATE: 02/08/2005
Name: PORT ST. JOE
FL
NOAA Chart: 11389 Latitude: 29° 48.9' N ( 29.81500)
USGS Quad: PORT ST. JOE Longitude: 85° 18.8' W ( -85.31330)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: NO 5 1975
MONUMENTATION: Tidal Station disk VM#: 9904
AGENCY: National Ocean Survey (NOS) IDB PID#: AS0308
SETTING CLASSIFICATION: Concrete monument OPUS PID:
LATITUDE: 29° 49.0' N ( 29.81670) LONGITUDE: 85° 18.3' W ( -85.30500)
The bench mark is a disk set in the top of a concrete monument, 33 m (109 ft)
north of the north edge of the sidewalk on First Street, 18.29 m (60.0 ft) east
of the centerline of U.S. Highway 98, 10 m (33 ft) south of the south rail of
the railroad spur line, 0.46 m (1.5 ft) west of a witness post, and 6 cm (0.2
ft) below ground level..
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 5
Station ID: 8728912 PUBLICATION DATE: 02/08/2005
Name: PORT ST. JOE
FL
NOAA Chart: 11389 Latitude: 29° 48.9' N ( 29.81500)
USGS Quad: PORT ST. JOE Longitude: 85° 18.8' W ( -85.31330)
D A T U M S
Datums at PORT ST. JOE based on:
LENGTH OF SERIES: 1 Year
TIME PERIOD: January 1976 - December 1976
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION: 8729840 PENSACOLA, PENSACOLA BAY
Elevations of datums referred to Mean Lower Low Water (MLLW), in METERS:
HIGHEST OBSERVED WATER LEVEL (12/15/1981) = 0.774
MEAN HIGHER HIGH WATER MHHW = 0.504
MEAN HIGH WATER MHW = 0.413
North American Vertical Datum NAVD88 = 0.251
MEAN SEA LEVEL MSL = 0.250
MEAN TIDE LEVEL MTL = 0.237
MEAN LOW WATER MLW = 0.062
MEAN LOWER LOW WATER MLLW = 0.000
LOWEST OBSERVED WATER LEVEL (01/18/1981) = -0.722
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
NO 1 1975 3.670 3.257
NO 2 1975 2.687 2.274
NO 3 1975 3.945 3.532
NO 4 1975 2.605 2.192
NO 5 1975 3.031 2.618
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 5
Station ID: 8728912 PUBLICATION DATE: 02/08/2005
Name: PORT ST. JOE
FL
NOAA Chart: 11389 Latitude: 29° 48.9' N ( 29.81500)
USGS Quad: PORT ST. JOE Longitude: 85° 18.8' W ( -85.31330)
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.