U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 7
Station ID: 8728488 PUBLICATION DATE: 05/22/2013
Name: SOUTH CARRABELLE BEACH
FL
NOAA Chart: 11404 Latitude: 29° 48.1' N ( 29.80170)
USGS Quad: CARRABELLE Longitude: 84° 44.2' W ( -84.73670)
To reach the tidal bench marks from the post office in Carrabelle, proceed 9.66
km (6.0 mi) SW along U.S. Highway 98/319 to the residence of Russell Sinks. The
bench marks are on the property and west along the highway. The tide gage and
staff were located on the private dock of Mr. Sinks.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 8488 D 1977
DESIGNATION: 872 8488 D TIDAL
MONUMENTATION: Tidal Station disk VM#: 9841
AGENCY: Florida Department of Natural Resources
(FLDNR) IDB PID#:
SETTING CLASSIFICATION: Copper-clad steel rod OPUS PID#: DM4811
LATITUDE: 29° 48.0' N ( 29.80000) LONGITUDE: 84° 44.5' W ( -84.74167)
The primary bench mark is a disk located about 92.96 m (305.0 ft) NE of a CGS
bench mark stamped S 293 1967, 86.87 m (285.0 ft) SW of bench mark 8488 E 2007,
15.24 m (50.0 ft) SW of wooden power pole #7129302 with three guy wires
attached, and 0.30 m (1.0 ft) SE of a metal witness post. The bench mark is set
about 0.61 m (2.0 ft) below the level of U.S. Highway 98, crimped to the top of
a copper clad steel rod driven into the ground and encased in a PVC pipe.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 7
Station ID: 8728488 PUBLICATION DATE: 05/22/2013
Name: SOUTH CARRABELLE BEACH
FL
NOAA Chart: 11404 Latitude: 29° 48.1' N ( 29.80170)
USGS Quad: CARRABELLE Longitude: 84° 44.2' W ( -84.73670)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: S 293 1967
DESIGNATION: S 293
MONUMENTATION: Bench Mark disk VM#: 9838
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: AS0213
SETTING CLASSIFICATION: Concrete Post OPUS PID:
LATITUDE: 29° 48.0' N ( 29.80000) LONGITUDE: 84° 44.5' W ( -84.74170)
The bench mark is a disk located 19.26 m (63.2 ft) NW from utility pole
#58X1485R on the SE side of Highway 98, 11.28 m (37.0 ft) NNW from the
approximate center of Highway 98, 1.62m (5.3 ft) west from utility brace pole
#58X1484R with guy wire and 0.40 m (1.3 ft) NE from a metal witness post. Note:
The station projects 4.00 cm above ground.
BENCH MARK STAMPING: 8488 B 1977
DESIGNATION: 872 8488 B TIDAL
MONUMENTATION: Tidal Station disk VM#: 9839
AGENCY: Florida Department of Natural Resources
(FLDNR) IDB PID#:
SETTING CLASSIFICATION: Concrete monument OPUS PID:
LATITUDE: 29° 48.1' N ( 29.80170) LONGITUDE: 84° 44.2' W ( -84.73670)
The bench mark is a disk set flush in the top of a concrete monument located on
the NW side of the highway, 99 m (325 ft) SW of the drive to Mr. Sinks house, 26
m (85 ft) west of utility pole #58X616R, 21 m (69 ft) SW of utility anchor pole
#58X1488R, 2 m (8 ft) SE of a witness post, 1 m (2 ft) below highway level, and
0.37 m (1.2 ft) below ground level.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 7
Station ID: 8728488 PUBLICATION DATE: 05/22/2013
Name: SOUTH CARRABELLE BEACH
FL
NOAA Chart: 11404 Latitude: 29° 48.1' N ( 29.80170)
USGS Quad: CARRABELLE Longitude: 84° 44.2' W ( -84.73670)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 8488 C 1977
DESIGNATION: 872 8488 C TIDAL
MONUMENTATION: Tidal Station disk VM#: 9840
AGENCY: Florida Department of Natural Resources
(FLDNR) IDB PID#:
SETTING CLASSIFICATION: Concrete monument OPUS PID:
LATITUDE: 29° 48.1' N ( 29.80170) LONGITUDE: 84° 44.2' W ( -84.73670)
The bench mark is a disk set flush in the top of a concrete monument, 124 m (406
ft) SW of bench mark 8488 B 1977, 20 m (65 ft) east of utility pole #58X2513R, 9
m (28 ft) NE of utility pole #58X1380R, 7.16 m (23.5 ft) SE of the centerline of
the highway, 0.82 m (2.7 ft) NW of a witness post, 1 m (2 ft) below highway
level, and 0.30 m (1.0 ft) below ground level.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 7
Station ID: 8728488 PUBLICATION DATE: 05/22/2013
Name: SOUTH CARRABELLE BEACH
FL
NOAA Chart: 11404 Latitude: 29° 48.1' N ( 29.80170)
USGS Quad: CARRABELLE Longitude: 84° 44.2' W ( -84.73670)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: D 46 1934 12.828
DESIGNATION: D 46
MONUMENTATION: Bench Mark disk VM#: 19009
AGENCY: US Coast & Geodetic Survey
(USC&GS) IDB PID#: AS0209
SETTING CLASSIFICATION: Concrete Monument OPUS PID:
LATITUDE: 29° 47.6' N ( 29.79333) LONGITUDE: 84° 45.4' W ( -84.75667)
The bench mark is a disk set in the top of a concrete post projecting 0.09 m
(0.3 ft) above the level of the ground, near the SW end of a curve 14.17 m (46.5
ft) NW of the center line of the highway, 9.60 m (31.5 ft) SW of power line
brace pole #58X1332R, 0.27 m (0.9 ft) NW of a metal witness post, and 0.30 m
(1.0 ft) below the level of the highway.
BENCH MARK STAMPING: 8488 E 2007
DESIGNATION: 872 8488 E TIDAL
MONUMENTATION: Tidal Station disk VM#: 19010
AGENCY: Florida Dep. of Environmental Protection
(FLDEP) IDB PID#:
SETTING CLASSIFICATION: Culvert Head Wall OPUS PID#: DM4812
LATITUDE: 29° 48.1' N ( 29.80167) LONGITUDE: 84° 44.4' W ( -84.74000)
The bench mark is a disk set flush in the top of an 11-foot by 9-foot concrete
headwall for a 24-inch culvert, located 86.9 m (285.0 ft) NE of bench mark 2488
D 1977, 18.9 m (62.0 ft) NW of a bench mark 2488 F 2007, 9.2 m (30.2 ft) NW of
the centerline of U.S. Highway 98, 7.1 m (23.3 ft) NE of wooden power pole
#7129303, 1.55 m (5.1 ft) NE of a carsonite witness post, and 0.91 m (3.0 ft)
below the level of U.S. Highway 98.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 7
Station ID: 8728488 PUBLICATION DATE: 05/22/2013
Name: SOUTH CARRABELLE BEACH
FL
NOAA Chart: 11404 Latitude: 29° 48.1' N ( 29.80170)
USGS Quad: CARRABELLE Longitude: 84° 44.2' W ( -84.73670)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 8488 F 2007
DESIGNATION: 872 8488 F TIDAL
MONUMENTATION: Survey disk VM#: 19011
AGENCY: Florida Dept. of Environmental
Protection (FLDEP) IDB PID#:
SETTING CLASSIFICATION: Culvert head wall OPUS PID#: DM4813
LATITUDE: 29° 48.1' N ( 29.80167) LONGITUDE: 84° 44.4' W ( -84.74000)
The bench mark is disk set flush in the top of an 11-foot by 9-foot concrete
headwall for a 24-inch culvert, located about 74.68 m (245.0 ft) SW of the grass
driveway of the residence at 2606 U.S. Highway 98, 18.90 m (62.0 ft) SE of bench
mark 8488 E 2007, 9.51 m (31.2 ft) SE of the centerline of U.S. Highway 98, 1.52
m (5.0 ft) below the level of U.S. Highway 98, and 1.49 m (4.9 ft) SW of a
carsonite witness post.
BENCH MARK STAMPING: 8488 G 2007
DESIGNATION: 872 8488 G TIDAL
MONUMENTATION: Survey disk VM#: 19012
AGENCY: Florida Dept. of Environmental
Protection (FLDEP) IDB PID#:
SETTING CLASSIFICATION: Sea Wall OPUS PID:
LATITUDE: 29° 47.9' N ( 29.79833) LONGITUDE: 84° 44.7' W ( -84.74500)
The bench mark is a disk set flush in the top of the NE end of a 11.43 m (37.5
ft) long concrete sea wall located on the north shore of the Saint George Sound
on the back side of the vacant lot, located 49.35 m (161.9 ft) SE of the
centerline of U.S. Highway 98, 26.0 m (85.3 ft) ESE of the SE corner of a
concrete driveway, 1.22 m (4.0 ft) NNE of an 8-inch palm tree, 0.18 m (0.6 ft)
below the level of U.S. Highway 98, and 0.8 m (2.6 ft) east of a carsonite
witness post.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 7
Station ID: 8728488 PUBLICATION DATE: 05/22/2013
Name: SOUTH CARRABELLE BEACH
FL
NOAA Chart: 11404 Latitude: 29° 48.1' N ( 29.80170)
USGS Quad: CARRABELLE Longitude: 84° 44.2' W ( -84.73670)
T I D A L D A T U M S
Tidal datums at SOUTH CARRABELLE BEACH based on:
LENGTH OF SERIES: 6 MONTHS
TIME PERIOD: December 1977 - May 1978
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION: 8728360 TURKEY POINT
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
MEAN HIGHER HIGH WATER MHHW = 0.749
MEAN HIGH WATER MHW = 0.692
North American Vertical Datum NAVD88 = 0.449
MEAN TIDE LEVEL MTL = 0.439
MEAN SEA LEVEL MSL = 0.425
MEAN LOW WATER MLW = 0.186
MEAN LOWER LOW WATER MLLW = 0.000
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
8488 D 1977 6.728 6.036
S 293 1967 7.665 6.973
8488 B 1977 2.560 1.868
8488 C 1977 2.654 1.962
D 46 1934 12.828 4.182 3.490
8488 E 2007 3.295 2.603
8488 F 2007 2.892 2.200
8488 G 2007 2.985 2.293
Foot Notes:
Bench marks 8488 E 2007, 8488 F 2007, 8488 G 2007, and D 46 1934 12.828 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 7 of 7
Station ID: 8728488 PUBLICATION DATE: 05/22/2013
Name: SOUTH CARRABELLE BEACH
FL
NOAA Chart: 11404 Latitude: 29° 48.1' N ( 29.80170)
USGS Quad: CARRABELLE Longitude: 84° 44.2' W ( -84.73670)
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.