U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 10
Station ID: 8728690 PUBLICATION DATE: 12/19/2018
Name: APALACHICOLA, APALACHICOLA RIVER
FL
NOAA Chart: 11401 Latitude: 29° 43.6' N ( 29.72670)
USGS Quad: APALACHICOLA Longitude: 84° 58.9' W ( -84.98170)
To reach the tidal bench marks from the Post Office at the corner of Commerce
and D Streets in Apalachicola, proceed north along D Street one block to Water
Street, then NW along Water Street for 0.32 km (0.2 mi) to the U.S. Coast Guard
Light Attendant Station. The bench marks are located throughout the city. The
tide gauge is located on the west side of the Apalachicola Municipal dock.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 14.124 NO 1 1933
DESIGNATION: 872 8690 TIDAL 1
MONUMENTATION: Tidal Station disk VM#: 767
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: AS0240
SETTING CLASSIFICATION: Step OPUS PID:
LATITUDE: 29° 43.6' N ( 29.72739) LONGITUDE: 84° 59.0' W ( -84.98331)
The primary bench mark is a disk set flush in a concrete bannister on the NE
corner of the steps at the main entrance to the Post Office, 17.68 m (58.01 ft)
SE of the centerline of D Street, 14.33 m (47.01 ft) SW of the centerline of
Commerce Street, 2.96 m (9.71 ft) SW of a flagpole, and 0.79 m (2.59 ft) above
ground level. Note: The bench mark may be covered by a potted plant in a box.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 10
Station ID: 8728690 PUBLICATION DATE: 12/19/2018
Name: APALACHICOLA, APALACHICOLA RIVER
FL
NOAA Chart: 11401 Latitude: 29° 43.6' N ( 29.72670)
USGS Quad: APALACHICOLA Longitude: 84° 58.9' W ( -84.98170)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: APALACHICOLA 1934 15.771
DESIGNATION: APALACHICOLA
MONUMENTATION: Tidal Station disk VM#: 768
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: AS0244
SETTING CLASSIFICATION: Concrete Base OPUS PID#: AS0244
LATITUDE: 29° 43.5' N ( 29.72556) LONGITUDE: 84° 59.1' W ( -84.98581)
The bench mark is a disk set in the top of the south corner of the second step
above ground of the concrete base of Gorrie Monument, in the north angle of the
intersection of 6th Street and D Street, 30.90 m (101.38 ft) ENE ofthe
centerline of 6th Street, 29.65 m (97.28 ft) WNW of the center of D Street,
25.25 m (82.84 ft) SE of the east corner of the Trinity Episcopal Church, and
0.38 m (1.25 ft) above the ground.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 10
Station ID: 8728690 PUBLICATION DATE: 12/19/2018
Name: APALACHICOLA, APALACHICOLA RIVER
FL
NOAA Chart: 11401 Latitude: 29° 43.6' N ( 29.72670)
USGS Quad: APALACHICOLA Longitude: 84° 58.9' W ( -84.98170)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: J 45 1934 15.449
DESIGNATION: J 45
MONUMENTATION: Tidal Station disk VM#: 769
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: AS0241
SETTING CLASSIFICATION: Step OPUS PID#: AS0241
LATITUDE: 29° 43.5' N ( 29.72567) LONGITUDE: 84° 59.0' W ( -84.98331)
The bench mark is a disk set in top of the center of the third step from bottom
of base of Marks Monument and on the SE side of the monument, in the SW angle of
the intersection, west and across the street from the courthouse, 19.64 m (64.44
ft) south of the centerline of C street, 15.10 m (49.54 ft) SW of the center of
U.S. Highway 98, and 0.85 m (2.79 ft) north of the south edge of the 3RD step of
the monument.
BENCH MARK STAMPING: NO 3 1974
DESIGNATION: 872 8690 TIDAL 3
MONUMENTATION: Bench Mark disk VM#: 771
AGENCY: National Ocean Survey (NOS) IDB PID#: AS0514
SETTING CLASSIFICATION: Sidewalk OPUS PID:
LATITUDE: 29° 43.8' N ( 29.72947) LONGITUDE: 84° 59.1' W ( -84.98486)
The bench mark is a disk set flush in the concrete steps of the front entrance
to Wefings Marine Hardware, 47.2 m (154.9 ft) SW of bench mark NO 4 1974, 28.35
m (93.01 ft) WNW of utility pole 4/60/1/75, 16.10 m (52.82 ft) WNW of the
centerline of F Street, and 10.05 m (32.97 ft) SW of the centerline of Water
Street.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 10
Station ID: 8728690 PUBLICATION DATE: 12/19/2018
Name: APALACHICOLA, APALACHICOLA RIVER
FL
NOAA Chart: 11401 Latitude: 29° 43.6' N ( 29.72670)
USGS Quad: APALACHICOLA Longitude: 84° 58.9' W ( -84.98170)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 8690 A 1978
DESIGNATION: 872 8690 A TIDAL
MONUMENTATION: Bench Mark disk VM#: 773
AGENCY: National Ocean Survey (NOS) IDB PID:
SETTING CLASSIFICATION: Stainless steel rod OPUS PID:
LATITUDE: 29° 43.4' N ( 29.72333) LONGITUDE: 84° 59.0' W ( -84.98325)
The bench mark is a disk set at the SW corner of Battery Park between two large
live oak trees, 53.95 m (176.8 ft) SE of the centerline of Market Street, 51.8 m
(169.9 ft) NW of the west corner of the boat basin, 34.44 m (112.99 ft) NNE of
the centerline of Bay Avenue, 11.0 m (36.1ft) ENE of the centerline of 6th
Street, and 0.09 m (0.3 ft) south of a witness post. The bench mark is crimped
to the top of a stainless steel rod driven 8.53 m (27.9 ft), and encased in a
5-inch PVC pipe and concrete kick-block with an aluminum access LID.
BENCH MARK STAMPING: 8690 B 1978
DESIGNATION: 872 8690 B
MONUMENTATION: Bench Mark disk VM#: 774
AGENCY: National Ocean Survey (NOS) IDB PID#: DM4900
SETTING CLASSIFICATION: Stainless steel rod OPUS PID#: DM4900
LATITUDE: 29° 43.3' N ( 29.72164) LONGITUDE: 84° 59.1' W ( -84.98425)
The bench mark is a disk located 4 m (13.1 ft) ESE of the center of the
intersection of Bay Avenue and 8th Street, 4 m (13.1 ft) WNW of Utility Pole
A51253, 2nd number 025257/107075), and 1.07 m (3.51 ft) SE of the south edge of
Bay Avenue. The bench mark is crimped to a stainless steel rod driven 9.8 m
(32.2 ft), and encased in a 5-inch PVC pipe and concrete kickblock with aluminum
access LTD.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 10
Station ID: 8728690 PUBLICATION DATE: 12/19/2018
Name: APALACHICOLA, APALACHICOLA RIVER
FL
NOAA Chart: 11401 Latitude: 29° 43.6' N ( 29.72670)
USGS Quad: APALACHICOLA Longitude: 84° 58.9' W ( -84.98170)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 8690 D 1983
DESIGNATION: 872 8690 D TIDAL
MONUMENTATION: Bench Mark disk VM#: 775
AGENCY: National Ocean Survey (NOS) IDB PID:
SETTING CLASSIFICATION: Step OPUS PID:
LATITUDE: 29° 43.6' N ( 29.72608) LONGITUDE: 84° 58.9' W ( -84.98242)
The bench mark is a disk set flush in the NW corner of the bottom of the north
entrance to the Franklin County Courthouse, 57.15 m (187.50 ft) ENE of bench
mark J 45 1934 15.449, 33.00 m (108.27 ft) ESE of the centerline of Highway
98/Market Street, 18.59 m (60.99 ft) east of the courthouse flag pole, 17.25 m
(56.59 ft) south of the centerline of Leslie Street, and 2.59 m (8.50 ft) WSW of
the centerline of the north entrance sidewalk to the courthouse.
BENCH MARK STAMPING: 8690 E 1983
DESIGNATION: 872 8690 E TIDAL
MONUMENTATION: Bench Mark disk VM#: 776
AGENCY: National Ocean Survey (NOS) IDB PID:
SETTING CLASSIFICATION: Driveway OPUS PID:
LATITUDE: 29° 43.7' N ( 29.72892) LONGITUDE: 84° 59.1' W ( -84.98428)
The bench mark is a disk set flush in the concrete foundation lip of
Apalachicola Volunteer Fire Department, in front of the second column north of
the SE corner of the building, between two 1 m (3.28 ft) high and 0.09 m (0.30
ft) diameter steel pipes, 91.44 m (300.00 ft) SE of bench mark NO 3 1974, 75.29
m (247.01 ft) SE of the centerline of F Street, 49.38 m (162.01 ft) WSW of the
SW shoreline of Apalachicola River, 10.50 m (34.45 ft) WSW of the centerline of
Water Street, 4.63 m (15.19 ft) NW of the SE corner of the fire station, and
0.24 m (0.79 ft) NE of the NE face of the fire station.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 10
Station ID: 8728690 PUBLICATION DATE: 12/19/2018
Name: APALACHICOLA, APALACHICOLA RIVER
FL
NOAA Chart: 11401 Latitude: 29° 43.6' N ( 29.72670)
USGS Quad: APALACHICOLA Longitude: 84° 58.9' W ( -84.98170)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: P 294 1967
DESIGNATION: P 294
MONUMENTATION: Bench Mark disk VM#: 19078
AGENCY: US Coast & Geodetic Survey
(USC&GS) IDB PID#: AS0138
SETTING CLASSIFICATION: Concrete Monument OPUS PID:
LATITUDE: 29° 44.1' N ( 29.73464) LONGITUDE: 85° 1.1' W ( -85.01858)
The bench mark is a disk set in the top of a concrete post projecting 0.06 m
(0.2 ft) above the level of the ground, 11.13 m (36.5 ft) SW of the center line
of the highway, 8.53 m (28.0 ft) SE of a fence corner around a lot, 6.40 m (21.0
ft) NW of the center line of driveway, 0.40 m (1.3 ft) SE of a metal witness
post, 0.30 m (1.0 ft) NE of a fence line, and 0.30 m (1.0 ft) above the level of
the highway..
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 7 of 10
Station ID: 8728690 PUBLICATION DATE: 12/19/2018
Name: APALACHICOLA, APALACHICOLA RIVER
FL
NOAA Chart: 11401 Latitude: 29° 43.6' N ( 29.72670)
USGS Quad: APALACHICOLA Longitude: 84° 58.9' W ( -84.98170)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: Q 294 1967
DESIGNATION: Q 294
MONUMENTATION: Bench Mark disk VM#: 19079
AGENCY: US Coast & Geodetic Survey
(USC&GS) IDB PID#: AS0143
SETTING CLASSIFICATION: Concrete Monument OPUS PID:
LATITUDE: 29° 43.9' N ( 29.73144) LONGITUDE: 85° 0.2' W ( -85.00339)
The bench mark is a disk set in the top of a concrete post projecting 0.06 m
(0.2 ft) above the level of the ground, 36.58 m (120.0 ft) NW of the center of
the junction of 24th Avenue, near the junction of the west one of 4 driveways
leading north into the Magnolia Cemetery, 9.75 m (32.0 ft) north of the center
line of the highway, 4.42 m (14.5 ft) west of the center line of driveway, 0.46
m (1.5 ft) east of a metal witness post, and about level with the highway.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 8 of 10
Station ID: 8728690 PUBLICATION DATE: 12/19/2018
Name: APALACHICOLA, APALACHICOLA RIVER
FL
NOAA Chart: 11401 Latitude: 29° 43.6' N ( 29.72670)
USGS Quad: APALACHICOLA Longitude: 84° 58.9' W ( -84.98170)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: D 689 2007
DESIGNATION: D 689
MONUMENTATION: Survey disk VM#: 19080
AGENCY: Florida Dept. of Environmental
Protection (FLDEP) IDB PID#: DM4901
SETTING CLASSIFICATION: Concrete Culvert Head Wall OPUS PID:
LATITUDE: 29° 43.4' N ( 29.72350) LONGITUDE: 84° 59.6' W ( -84.99378)
The bench mark is a disk set flush in the top of the NE end of a concrete
culvert headwall in the SE quadrant of the intersection located about 83.82 m
(275.0 ft) SW of the centerline of 12th street, 11.70 m (38.4 ft) NE of the
centerline of 13th street, 9.02 m (29.6 ft) SE of the centerline of Avenue H,
0.30 m 0.30 m (1.0 ft) below the level of Avenue H and 0.5 ft NW of a carsonite
witness post.
BENCH MARK STAMPING: 8690 F 2009
DESIGNATION: 872 8690 F
MONUMENTATION: Metal Rod VM#: 19558
AGENCY: National Ocean Service (NOS) IDB PID:
SETTING CLASSIFICATION: Stainless steel rod OPUS PID#: DO1545
LATITUDE: 29° 43.5' N ( 29.72439) LONGITUDE: 84° 58.9' W ( -84.98083)
The bench mark is a metal rod set flush in a grassy area on the foot of the
Municipal commercial pier is set 120.9 m (396.7 ft) NE of the east side of the
public boat ramp, 55.8 m (183.1 ft) SE of the SE corner of the baseball field
concession stand, 35.0 m (114.8 ft) WSW of the SW corner of the tidal station,
24.7 m (81.0 ft) ESE of water ST., 2.0 m (6.6 ft) NE of the NE corner of the
city dock, and 1.0 m (3.28 ft) SE of a telephone pole. The datum point is set
on top of a flange-encased rod, being the top of a stainless steel rod driven
27.3 m (89.57 ft) to refusal, and encased in a 5-inch NOS logo cap.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 9 of 10
Station ID: 8728690 PUBLICATION DATE: 12/19/2018
Name: APALACHICOLA, APALACHICOLA RIVER
FL
NOAA Chart: 11401 Latitude: 29° 43.6' N ( 29.72670)
USGS Quad: APALACHICOLA Longitude: 84° 58.9' W ( -84.98170)
T I D A L D A T U M S
Tidal datums at APALACHICOLA, APALACHICOLA RIVER 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 (10/10/2018) = 2.845
MEAN HIGHER HIGH WATER MHHW = 0.492
MEAN HIGH WATER MHW = 0.461
MEAN TIDE LEVEL MTL = 0.291
MEAN SEA LEVEL MSL = 0.277
North American Vertical Datum NAVD88 = 0.232
MEAN LOW WATER MLW = 0.122
MEAN LOWER LOW WATER MLLW = 0.000
LOWEST OBSERVED WATER LEVEL (01/18/1981) = -0.560
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
14.124 NO 1 1933 4.362 3.902
APALACHICOLA 1934 15.771 4.869 4.408
J 45 1934 15.449 4.769 4.309
NO 3 1974 1.887 1.427
8690 A 1978 2.781 2.320
8690 B 1978 1.642 1.182
8690 D 1983 3.719 3.259
8690 E 1983 1.887 1.426
P 294 1967 4.030 3.570
Q 294 1967 5.396 4.936
D 689 2007 4.788 4.328
8690 F 2009 0.965 0.505
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 10 of 10
Station ID: 8728690 PUBLICATION DATE: 12/19/2018
Name: APALACHICOLA, APALACHICOLA RIVER
FL
NOAA Chart: 11401 Latitude: 29° 43.6' N ( 29.72670)
USGS Quad: APALACHICOLA Longitude: 84° 58.9' W ( -84.98170)
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.