U.S. DEPARTMENT OF COMMERCE
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National Ocean Service
Datums Page Page 1 of 9
Station ID: 8725520 PUBLICATION DATE: 04/21/2003
Name: FORT MYERS, CALOOSAHATCHEE RIVER
FL
NOAA Chart: 11426 Latitude: 26° 38.8' N ( 26.64670)
USGS Quad: FORT MYERS Longitude: 81° 52.3' W ( -81.87170)
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 between Main Street and the river. The tide
gage and staff are located in the City of Fort Myers Yacht Basin on the west
side of the west Basin entrance, at the foot of Hendry Street.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 5520 A 1978
DESIGNATION: 872 5520 A TIDAL
MONUMENTATION: Tidal Station disk VM#: 737
AGENCY: National Ocean Survey (NOS) IDB PID#: AD7888
SETTING CLASSIFICATION: Retaining wall OPUS PID#: AD7888
LATITUDE: 26° 38.8' N ( 26.64633) LONGITUDE: 81° 52.2' W ( -81.87058)
The primary bench mark is a disk set in top of a concrete bulkhead or retaining
wall, at the SW corner of the Yacht Basin of the City of Fort Myers, 26.49 m
(86.9 ft) north of the north curb of Edwards Drive, 23.29 m (76.4 ft) east of
the east edge of Hendry Street, 3.70 m (12.1 ft) SW of the NE corner of a wooden
walkway around the basin, and 2.71 m (8.9 ft) NE of a corner point of the
concrete fence/wall of the Yacht Basin.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 9
Station ID: 8725520 PUBLICATION DATE: 04/21/2003
Name: FORT MYERS, CALOOSAHATCHEE RIVER
FL
NOAA Chart: 11426 Latitude: 26° 38.8' N ( 26.64670)
USGS Quad: FORT MYERS Longitude: 81° 52.3' W ( -81.87170)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: V 37 FORT MYERS 1932 11.460
DESIGNATION: V 37
MONUMENTATION: Bench Mark disk VM#: 734
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: AD1434
SETTING CLASSIFICATION: Concrete balustrade OPUS PID:
LATITUDE: 26° 38.5' N ( 26.64244) LONGITUDE: 81° 52.2' W ( -81.87036)
The bench mark is a disk set vertically in the NW face of the SW balustrade of
the NW entrance of the County Courthouse, 36.70 m (120.4 ft) NE of the
centerline of the northbound lanes of Monroe Street, 34.69 m (113.8 ft) SE of
the centerline of Main Street, 9.69 m (31.8 ft) SW of the center of the
entrance, 0.21 m (0.7 ft) NE of the SW corner of the balustrade, and 0.3 m (1
ft) above ground level.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 9
Station ID: 8725520 PUBLICATION DATE: 04/21/2003
Name: FORT MYERS, CALOOSAHATCHEE RIVER
FL
NOAA Chart: 11426 Latitude: 26° 38.8' N ( 26.64670)
USGS Quad: FORT MYERS Longitude: 81° 52.3' W ( -81.87170)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: G 246 1965
DESIGNATION: G 246
MONUMENTATION: Bench Mark disk VM#: 735
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: AD1433
SETTING CLASSIFICATION: Copper-clad steel rod OPUS PID:
LATITUDE: 26° 38.6' N ( 26.64272) LONGITUDE: 81° 52.2' W ( -81.87008)
The bench mark is a disk set in a flower bed in the north corner of the lawn at
the County Courthouse, 21.79 m (71.5 ft) SE of the center of Main Street, 20.39
m (66.9 ft) north of the NE corner of the building, 15.21 m (49.9 ft) SW of the
centerline of Broadway, 4.69 m (15.4 ft) south of the SE corner of a memorial
monument (World War I American Legion), 1.71 m (5.6 ft) NE of the NE edge of a
sidewalk, 0.70 m (2.3 ft) SE of the SE edge of a sidewalk, and 0.3 m (1 ft)
above the level of the streets. The bench mark is crimped to the top of a
copper-clad steel rod driven 22.3 m (73 ft) to refusal, and encased inside a PVC
pipe and concrete kickblock. NOTE: the disk has been hit and is bent down along
the NW edge.
BENCH MARK STAMPING: 5520 B 1978
DESIGNATION: 872 5520 B TIDAL
MONUMENTATION: Tidal Station disk VM#: 738
AGENCY: National Ocean Survey (NOS) IDB PID#: AD8306
SETTING CLASSIFICATION: Retaining wall OPUS PID:
LATITUDE: 26° 38.8' N ( 26.64689) LONGITUDE: 81° 52.3' W ( -81.87117)
The bench mark is a disk set in top of the SW concrete retaining wall at Slip
Number C 10 of the City of Fort Myers Yacht Basin, 118.51 m (388.8 ft) NW of the
center line of Edwards Drive, 11.70 m (38.4 ft) SE of the NW end of the wall,
8.90 m (29.2 ft) NE of the center of the northbound lanes of Hendry Street, 2.01
m (6.6 ft) NE of a guardrail, and level with the drive.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 9
Station ID: 8725520 PUBLICATION DATE: 04/21/2003
Name: FORT MYERS, CALOOSAHATCHEE RIVER
FL
NOAA Chart: 11426 Latitude: 26° 38.8' N ( 26.64670)
USGS Quad: FORT MYERS Longitude: 81° 52.3' W ( -81.87170)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 5520 F 1990
DESIGNATION: 872 5520 F TIDAL
MONUMENTATION: Tidal Station disk VM#: 1783
AGENCY: National Ocean Service (NOS) IDB PID#: AD8309
SETTING CLASSIFICATION: Retaining wall OPUS PID:
LATITUDE: 26° 38.7' N ( 26.64514) LONGITUDE: 81° 52.4' W ( -81.87294)
The bench mark is a disk set in top of a concrete retaining wall on the NW edge
of Riverside Park, 89 m (292 ft) NW of the centerline of Edwards Drive, 66.29 m
(217.5 ft) SW of the NE end of the wall, 33.01 m (108.3 ft) west of the west end
of a memorial monument (Buckingham and Page Army Air Fields), 18.90 m (62.0 ft)
NW of the SW corner of a footing for a flag pole, 5.61 m (18.4 ft) NE of the
extended centerline of the northbound lanes of Monroe Street, and 0.3 m (1 ft)
above the level of the drive.
BENCH MARK STAMPING: 5520 G 1990
DESIGNATION: 872 5520 G TIDAL
MONUMENTATION: Tidal Station disk VM#: 1784
AGENCY: National Ocean Service (NOS) IDB PID#: AD8308
SETTING CLASSIFICATION: Boat ramp wall OPUS PID:
LATITUDE: 26° 38.7' N ( 26.64500) LONGITUDE: 81° 52.4' W ( -81.87330)
The bench mark is a disk set in top of a concrete retaining wall on the NW edge
of Riverside Park, 93.79 m (307.7 ft) NW of the centerline of Edwards Drive,
72.39 (237.5 ft) NE of the extended centerline of the northbound lanes of Monroe
Street, 37.89 m (124.3 ft) NE of the NE corner of a memorial monument
(Buckingham and Page Army Air Fields), 10.09 m (33.1 ft) SW of the center of a
boat ramp, and 0.3 m (1 ft) above the level of the drive.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 9
Station ID: 8725520 PUBLICATION DATE: 04/21/2003
Name: FORT MYERS, CALOOSAHATCHEE RIVER
FL
NOAA Chart: 11426 Latitude: 26° 38.8' N ( 26.64670)
USGS Quad: FORT MYERS Longitude: 81° 52.3' W ( -81.87170)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 5520 H 1990
DESIGNATION: 872 5520 H TIDAL
MONUMENTATION: Tidal Station disk VM#: 1785
AGENCY: National Ocean Service (NOS) IDB PID#: AD8307
SETTING CLASSIFICATION: Concrete retaining wall OPUS PID:
LATITUDE: 26° 38.7' N ( 26.64492) LONGITUDE: 81° 52.4' W ( -81.87339)
The bench mark is a disk set in top of a concrete retaining wall on the NW edge
of Riverside Park, 60.41 m (198.2 ft) SW of the extended centerline of the
northbound lanes of Monroe Street, 54.10 m (177.5 ft) NW of the centerline of
Edwards Drive, 30.78 m (101.0 ft) NE of the center of a ramp leading to a
fishing pier, 10.09 m (33.1 ft) SW of the center of a boat ramp, and 0.3 m (1
ft) above the level of the drive.
BENCH MARK STAMPING: 5520 J 1997
DESIGNATION: 872 5520 J
MONUMENTATION: Flange-encased Rod VM#: 13772
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Stainless steel rod in sleeve OPUS PID:
LATITUDE: 26° 38.6' N ( 26.64306) LONGITUDE: 81° 52.4' W ( -81.87406)
The bench mark is a flange-encased rod located in the center of Centennial Park,
70.25 m (230.5 ft) north of a fire hydrant at the south entrance of the
Centennial Park, 41.85 m (137.3 ft) SE of the SE corner of the restroom and
maintenance building in the west side of park, and 41.15 m (135.0 ft) west of
the SE end of a brick wall that runs along the east side of the park. The datum
point is the top of a stainless steel rod driven 17.3 m (57 ft) to refusal, and
encased in a no-tox grease-filled sleeve inside a 5-inch NOS logo cap.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 9
Station ID: 8725520 PUBLICATION DATE: 04/21/2003
Name: FORT MYERS, CALOOSAHATCHEE RIVER
FL
NOAA Chart: 11426 Latitude: 26° 38.8' N ( 26.64670)
USGS Quad: FORT MYERS Longitude: 81° 52.3' W ( -81.87170)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: B 242 1965
DESIGNATION: B 242
MONUMENTATION: Bench Mark disk VM#: 13773
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: AD1431
SETTING CLASSIFICATION: Bridge pier OPUS PID:
LATITUDE: 26° 38.5' N ( 26.64103) LONGITUDE: 81° 52.4' W ( -81.87269)
The bench mark is a disk set vertically in the west face of the west one of the
second row of bridge piers south from the north end of the overpass of U.S.
Highway 41 over State Highway 867 (also known as McGregor Boulevard), 7.41 m
(24.3 ft) NW of the centerline of the southbound lane of State Highway 867, 3.60
m (11.8 ft) west of the center of the overpass, and 0.79 m (2.6 ft) above ground
level.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 7 of 9
Station ID: 8725520 PUBLICATION DATE: 04/21/2003
Name: FORT MYERS, CALOOSAHATCHEE RIVER
FL
NOAA Chart: 11426 Latitude: 26° 38.8' N ( 26.64670)
USGS Quad: FORT MYERS Longitude: 81° 52.3' W ( -81.87170)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: X 415 1992
DESIGNATION: X 415
MONUMENTATION: Flange-encased Rod VM#: 13774
AGENCY: National Geodetic Survey (NGS) IDB PID#: AD8310
SETTING CLASSIFICATION: Stainless steel rod OPUS PID:
LATITUDE: 26° 38.9' N ( 26.64830) LONGITUDE: 81° 51.8' W ( -81.86330)
The bench mark is a flange-encased rod located at the intersection of First
Street and Poinsetta Avenue, 43.80 m (143.7 ft) SW of the extended center of
Poinsetta Avenue, 12.41 m (40.7 ft) NE of the center of the NE entrance to the
Calusa Harbor Retirement Community, 6.10 m (20 ft) south of underground cable
junction box No. 2635, 5.90 m (19.4 ft) north of the centerline of the street,
and 0.49 m (1.6 ft) SE of a T-junction utility pole No. 5 5818 8820 09. The
datum point is at ground level, being the top of a stainless steel rod driven
18.5 m (61 ft), and encased in a 5-inch PVC pipe with logo cap.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 8 of 9
Station ID: 8725520 PUBLICATION DATE: 04/21/2003
Name: FORT MYERS, CALOOSAHATCHEE RIVER
FL
NOAA Chart: 11426 Latitude: 26° 38.8' N ( 26.64670)
USGS Quad: FORT MYERS Longitude: 81° 52.3' W ( -81.87170)
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: 1/1983-12/1996 ; 1/1998-12/2001
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION:
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
HIGHEST OBSERVED WATER LEVEL (11/23/1988) = 1.439
MEAN HIGHER HIGH WATER MHHW = 0.401
MEAN HIGH WATER MHW = 0.335
North American Vertical Datum NAVD88 = 0.318
MEAN SEA LEVEL MSL = 0.193
MEAN TIDE LEVEL MTL = 0.191
MEAN LOW WATER MLW = 0.047
MEAN LOWER LOW WATER MLLW = 0.000
LOWEST OBSERVED WATER LEVEL (09/08/1965) = -0.872
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
5520 A 1978 1.417 1.082
V 37 FORT MYERS 1932 11.460 3.455 3.120
G 246 1965 2.858 2.523
5520 B 1978 1.389 1.054
5520 F 1990 1.457 1.122
5520 G 1990 1.174 0.839
5520 H 1990 1.464 1.129
5520 J 1997 1.737 1.402
B 242 1965 3.350 3.015
X 415 1992 1.044 0.709
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 9 of 9
Station ID: 8725520 PUBLICATION DATE: 04/21/2003
Name: FORT MYERS, CALOOSAHATCHEE RIVER
FL
NOAA Chart: 11426 Latitude: 26° 38.8' N ( 26.64670)
USGS Quad: FORT MYERS Longitude: 81° 52.3' W ( -81.87170)
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.