U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 7
PUBLICATION DATE: 07/20/1987
Station ID: 8725520 SUPERCEDED DATE: 04/21/2003
Name: FORT MYERS, CALOOSAHATCHEE RIVER
FLORIDA
NOAA Chart: 11426 Latitude: 26° 38.8' N
USGS Quad: FORT MYERS Longitude: 81° 52.2' W
To reach the tidal bench marks from the Fort Myers Post Office (33902), proceed
north along Monroe Street, then turn east on Edwards Drive to the intersection
with Hendry Street, then north on Hendry Street to Caloosahatchee River. The
bench marks are in the vicinity of Main Street and the pier. The tide gage and
staff are located in the City of Fort Myers Yacht Basin on the west side of the
west Basin entrance.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 5520 A 1978
MONUMENTATION: Survey Disk VM#: 737
AGENCY: PID#: AD7888
SETTING CLASSIFICATION: Concrete Bulkhead
The bench mark is set flush in the surface of a concrete bulkhead inside the SW
corner of the main boat basin of the City of Fort Myers Yacht Basin, 87.0 feet
(26.5 m) north of the north curb of Edwards Drive, 76.5 feet (23.3 m) east of
the east curb of Hendry Street, and 8.9 feet (2.7 m) NE of a corner point of the
concrete fence/wall of the SW corner of the main boat basin.
BENCH MARK STAMPING: 5520 C 1978
MONUMENTATION: Survey Disk VM#: 731
AGENCY: PID#: AD8311
SETTING CLASSIFICATION: Stainless Steel Rod
The bench mark is on the centerline of a grass median strip of Hendry Street,
44.4 feet (13.5 m) east of an ornamental retaining wall, and 35 feet (11 m)
south of the north bullnose of the median strip. The bench mark is crimped to a
stainless steel rod driven 28 feet (9 m) to refusal, encased in a PVC pipe and
concrete kickblock.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 7
PUBLICATION DATE: 07/20/1987
Station ID: 8725520 SUPERCEDED DATE: 04/21/2003
Name: FORT MYERS, CALOOSAHATCHEE RIVER
FLORIDA
NOAA Chart: 11426 Latitude: 26° 38.8' N
USGS Quad: FORT MYERS Longitude: 81° 52.2' W
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: NO 1 1971
MONUMENTATION: Survey Disk VM#: 732
AGENCY: PID#: AD7873
SETTING CLASSIFICATION: Concrete Foundation
The bench mark is set in the base of an abandoned radio tower near the Acme Oil
Company pier, 0.25 mile (0.40 km) east of Edison Bridge, 50 feet (15 m) south of
the pier, and 7 feet (2 m) west of the west side of Acme warehouse.
BENCH MARK STAMPING: V 37 FORT MYERS 1932 11.460
MONUMENTATION: Survey Disk VM#: 734
AGENCY: PID#: AD1434
SETTING CLASSIFICATION: Stone Banister
The bench mark is set vertically in the north face of the stone banister at the
west side of the north entrance to the old portion of the Lee County Courthouse,
near the intersection of Main and Monroe Streets, 32 feet (10 m) west of the
center of the north entrance to the building, 20 feet (6 m) north of the north
wall, and 1 foot (0.3 m) above the sidewalk.
BENCH MARK STAMPING: G 246 1965
MONUMENTATION: Survey Disk VM#: 735
AGENCY: PID#: AD1433
SETTING CLASSIFICATION: Copper-clad Steel Rod
The bench mark is near the north corner of the lawn of the Lee County
Courthouse, near the intersection of Main Street and Broadway, 67.3 feet
(20.5 m) SE of the centerline of Main Street, 50.2 feet (15.3 m) SW of the
centerline of Broadway, and 1.2 feet (0.4 m) SE of the NE corner of the sidewalk
around the American Legion Memorial. The bench mark is at ground level, crimped
to a copper-clad steel rod driven 73 feet (22 m) to refusal, and encased in a
4-inch steel pipe.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 7
PUBLICATION DATE: 07/20/1987
Station ID: 8725520 SUPERCEDED DATE: 04/21/2003
Name: FORT MYERS, CALOOSAHATCHEE RIVER
FLORIDA
NOAA Chart: 11426 Latitude: 26° 38.8' N
USGS Quad: FORT MYERS Longitude: 81° 52.2' W
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: H 246 1965
MONUMENTATION: Survey Disk VM#: 736
AGENCY: PID#: AD1432
SETTING CLASSIFICATION: Copper-clad Steel Rod
The bench mark is 62.3 feet (19.0 m) NW of the NW curb of Main Street, 42.8 feet
(13.0 m) NE of the center of the east entrance doorway of the City of Fort Myers
Police Department (1530 Heitman Street), 16.4 feet (5.0 m) SW of the SW curb of
Heitman Street, and 1 foot (0.3 m) NW of the edge of a sidewalk. The bench mark
is at ground level, crimped to a copper-clad steel rod driven 69 feet (21 m) to
refusal,in a 4-inch iron pipe.
BENCH MARK STAMPING: 5520 B 1978
MONUMENTATION: Survey Disk VM#: 738
AGENCY: PID#: AD8306
SETTING CLASSIFICATION: Bulkhead
The bench mark is set flush in the top of a bulkhead at the City of Fort Myers
Yacht Basin, 52.6 (16.0 m) east of the centerline of Hendry Street, 38.4 feet
(11.7 m) south of the north end of a concrete dock, and 6.8 feet (2.1 m) east of
an ornamental retaining wall.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 7
PUBLICATION DATE: 07/20/1987
Station ID: 8725520 SUPERCEDED DATE: 04/21/2003
Name: FORT MYERS, CALOOSAHATCHEE RIVER
FLORIDA
NOAA Chart: 11426 Latitude: 26° 38.8' N
USGS Quad: FORT MYERS Longitude: 81° 52.2' W
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 5520 D 1978
MONUMENTATION: Survey Disk VM#: 739
AGENCY: PID:
SETTING CLASSIFICATION: Concrete Base
The bench mark is set flush near the NE edge of a flag pole base at the east
entrance of the Fort Myers Post Office, 239 feet (73 m) south of the centerline
of Edwards Drive, 127 feet (39 m) NW of the centerline intersection of Bay and
Monroe Streets, 30 feet (9 m) west of the centerline of the southbound lane of
Monroe Street, and 15 feet (5 m) south of the centerline of the doorway of the
post office.
BENCH MARK STAMPING: 5520 E 1984
MONUMENTATION: Survey Disk VM#: 740
AGENCY: PID:
SETTING CLASSIFICATION: Stainless Steel Rod
The bench mark is on the east side of Sunset Park on Caloosahatchee River, 260
feet (79 m) NE of the centerline intersection of Edwards Drive and Monroe
Street, 251 feet (76 m) SW of the SW corner of the Acme Oil Company brick
building, 150 feet (46 m) north of the centerline of Edwards Drive, 110 feet (34
m) south of the centerline of a boat ramp, and 12 feet (4 m) west of the west
edge of the parking lot curb. The bench mark is 0.2 foot (0.1 m) below ground
level, crimped to a stainless steel rod driven to substantial resistance, and
encased in a PVC pipe and concrete kickblock.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 7
PUBLICATION DATE: 07/20/1987
Station ID: 8725520 SUPERCEDED DATE: 04/21/2003
Name: FORT MYERS, CALOOSAHATCHEE RIVER
FLORIDA
NOAA Chart: 11426 Latitude: 26° 38.8' N
USGS Quad: FORT MYERS Longitude: 81° 52.2' W
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 5520 F 1984
MONUMENTATION: Survey Disk VM#: 741
AGENCY: PID:
SETTING CLASSIFICATION: Concrete Foundation
The bench mark is set flush in a concrete traffic island at the intersection of
Monroe and First Streets, 270 feet (82 m) east of the SE corner of the Courtney
Building, 220 feet (67 m) SE of the SE corner of the Lee County Motor Bank
building, 31 feet (9 m) north of traffic utility pole #34IV66, and 25 feet (8 m)
south of the centerline intersection of Monroe and First Streets.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 7
PUBLICATION DATE: 07/20/1987
Station ID: 8725520 SUPERCEDED DATE: 04/21/2003
Name: FORT MYERS, CALOOSAHATCHEE RIVER
FLORIDA
NOAA Chart: 11426 Latitude: 26° 38.8' N
USGS Quad: FORT MYERS Longitude: 81° 52.2' W
T I D A L D A T U M S
Tidal datums at FORT MYERS, CALOOSAHATCHEE RIVER based on:
LENGTH OF SERIES: 18 YEARS
TIME PERIOD: 1966-1984
TIDAL EPOCH: 1960-1978
CONTROL TIDE STATION: 8726520 ST. PETERSBURG
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in FEET:
HIGHEST OBSERVED WATER LEVEL (06/19/1972) = 4.05
MEAN HIGHER HIGH WATER MHHW = 1.19
MEAN HIGH WATER MHW = 0.99
MEAN TIDE LEVEL MTL = 0.56
MEAN LOW WATER MLW = 0.12
* NATIONAL GEODETIC VERTICAL DATUM NGVD29 = 0.00
MEAN LOWER LOW WATER MLLW = 0.00
LOWEST OBSERVED WATER LEVEL (01/16/1972) = -2.04
* NGVD reference based on elevations published in Quad 260814, 1969, and NOS
leveling of 1986.
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In FEET above:
Stamping or Designation MLLW MHW
5520 A 1978 4.76 3.77
5520 C 1978 4.79 3.80
NO 1 1971 4.86 3.87
V 37 FORT MYERS 1932 11.460 11.46 10.47
G 246 1965 9.50 8.51
H 246 1965 8.54 7.55
5520 B 1978 4.68 3.69
5520 D 1978 6.31 5.32
5520 E 1984 4.80 3.81
5520 F 1984 7.43 6.44
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 7 of 7
PUBLICATION DATE: 07/20/1987
Station ID: 8725520 SUPERCEDED DATE: 04/21/2003
Name: FORT MYERS, CALOOSAHATCHEE RIVER
FLORIDA
NOAA Chart: 11426 Latitude: 26° 38.8' N
USGS Quad: FORT MYERS Longitude: 81° 52.2' 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.