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Bench Mark Sheet for 8725351, ESTERO ISLAND, ESTERO BAY FL

Superseded Epoch

Large map location marker Station Location
Small red map location marker Published bench mark
Small blue map location marker Unpublished bench mark

Bench mark positions only appear on the map if their coordinates in the CO-OPS database are at the precision of degrees/minutes/seconds/and tenths of seconds. If the coordinates are less precise, the mark will not appear.

Printable version

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
Datums Page                                                        Page  1 of  5

                                                                                
Station ID: 8725351                         PUBLICATION DATE:  11/13/2003
Name:       ESTERO ISLAND, ESTERO BAY                         
            FL
NOAA Chart: 11426                           Latitude:   26° 26.3' N (  26.43830)
USGS Quad:  FORT MYERS BEACH                Longitude:  81° 55.1' W ( -81.91830)


To reach the tidal bench marks from the bridge at the north end of Estero
Island, proceed 4.2 km (2.6 mi) SE on Estero Boulevard (State Road 865) to Mid
Island Marina at 4765 Estero Boulevard.  The bench marks are along the marina
seawall.  The tide gage and staff were located on pilings NNE of the floating
dock.


                         T I D A L   B E N C H   M A R K S


                 PRIMARY BENCH MARK STAMPING:  NO 1 1973
                         DESIGNATION:          872 5351 TIDAL 1

MONUMENTATION:           Tidal Station disk                    VM#:         7288
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  AD7863
SETTING CLASSIFICATION:  Concrete sea wall                     OPUS PID:        
LATITUDE:   26° 26.3' N (  26.43830)          LONGITUDE:  81° 55.1' W ( -81.91830)


The primary bench mark is a disk set flush in the concrete seawall on the SE
side of the marina area, 22.46 m (73.7 ft) SE of a 45 degree turn in the
seawall, and 21.43 m (70.3 ft) SE of Bench Mark NO 2 1973.  NOTE: Mark not found
by US Power Squadron in 1996 and 1998.



                         BENCH MARK STAMPING:  NO 2 1973
                         DESIGNATION:          872 5351 TIDAL 2

MONUMENTATION:           Tidal Station disk                    VM#:         7289
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  AD7864
SETTING CLASSIFICATION:  Concrete sea wall                     OPUS PID:        
LATITUDE:   26° 26.3' N (  26.43830)          LONGITUDE:  81° 55.1' W ( -81.91830)


The bench mark is a disk set flush in the concrete seawall of the SE side of the
marina area, 21.43 m (70.3 ft) NW of Bench Mark NO 1 1973, 17.83 m (58.5 ft) SE
of Bench Mark NO 3 1973, and 7.13 m (23.4 ft) SE of the concrete curbing.  NOTE:
Mark not found by US Power Squadron in 1996 and 1998.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  2 of  5

                                                                                
Station ID: 8725351                         PUBLICATION DATE:  11/13/2003
Name:       ESTERO ISLAND, ESTERO BAY                         
            FL
NOAA Chart: 11426                           Latitude:   26° 26.3' N (  26.43830)
USGS Quad:  FORT MYERS BEACH                Longitude:  81° 55.1' W ( -81.91830)


                         T I D A L   B E N C H   M A R K S


                         BENCH MARK STAMPING:  NO 3 1973
                         DESIGNATION:          872 5351 TIDAL 3

MONUMENTATION:           Tidal Station disk                    VM#:         7290
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  AD7865
SETTING CLASSIFICATION:  Concrete sea wall                     OPUS PID:        
LATITUDE:   26° 26.3' N (  26.43830)          LONGITUDE:  81° 55.1' W ( -81.91830)


The bench mark is a disk set flush in the concrete seawall NE of the gas pumps,
18.38 m (60.3 ft) SE of Bench Mark NO 4 1973, 17.83 m (58.5 ft) NW of Bench Mark
NO 2 1973, and 3.35 m (11.0 ft) NW of the NW end of the forklift launching area.



                         BENCH MARK STAMPING:  NO 4 1973
                         DESIGNATION:          872 5351 TIDAL 4

MONUMENTATION:           Tidal Station disk                    VM#:         7291
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  AD7866
SETTING CLASSIFICATION:  Concrete sea wall                     OPUS PID:        
LATITUDE:   26° 26.3' N (  26.43830)          LONGITUDE:  81° 55.1' W ( -81.91830)


The bench mark is a disk set flush in the concrete seawall on the NW side of the
marina, 22.34 m (73.3 ft) SE of the NW end of the seawall, and 18.38 m (60.3 ft)
NW of Bench Mark NO 3 1973.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  3 of  5

                                                                                
Station ID: 8725351                         PUBLICATION DATE:  11/13/2003
Name:       ESTERO ISLAND, ESTERO BAY                         
            FL
NOAA Chart: 11426                           Latitude:   26° 26.3' N (  26.43830)
USGS Quad:  FORT MYERS BEACH                Longitude:  81° 55.1' W ( -81.91830)


                         T I D A L   B E N C H   M A R K S


                         BENCH MARK STAMPING:  NO 5 1973
                         DESIGNATION:          872 5351 TIDAL 5

MONUMENTATION:           Tidal Station disk                    VM#:         7292
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  AD7867
SETTING CLASSIFICATION:  Concrete platform                     OPUS PID:        
LATITUDE:   26° 26.3' N (  26.43830)          LONGITUDE:  81° 55.1' W ( -81.91830)


The bench mark is a disk set flush in a concrete platform at the NW corner of
the marina, 22.43 m (73.6 ft) west of Bench Mark NO 4 1973, and 3.11 m (10.2 ft)
SW of the NW corner of the concrete platform.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  4 of  5

                                                                                
Station ID: 8725351                         PUBLICATION DATE:  11/13/2003
Name:       ESTERO ISLAND, ESTERO BAY                         
            FL
NOAA Chart: 11426                           Latitude:   26° 26.3' N (  26.43830)
USGS Quad:  FORT MYERS BEACH                Longitude:  81° 55.1' W ( -81.91830)


                            T I D A L   D A T U M S 


Tidal datums at ESTERO ISLAND, ESTERO BAY based on:

     LENGTH OF SERIES:      1 MONTH
     TIME PERIOD:           June 1973 - June 1973
     TIDAL EPOCH:           1983-2001
     CONTROL TIDE STATION:  8725110 NAPLES, GULF OF MEXICO


Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:

     MEAN HIGHER HIGH WATER                     MHHW   =  0.770
     MEAN HIGH WATER                            MHW    =  0.687
     North American Vertical Datum              NAVD88 =  0.643
     MEAN SEA LEVEL                             MSL    =  0.426
     MEAN TIDE LEVEL                            MTL    =  0.418
     MEAN LOW WATER                             MLW    =  0.149
     MEAN LOWER LOW WATER                       MLLW   =  0.000

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     NO 1 1973                                   1.325    0.638
     NO 2 1973                                   1.333    0.646
     NO 3 1973                                   1.341    0.654
     NO 4 1973                                   1.346    0.659
     NO 5 1973                                   1.709    1.022


                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  5 of  5

                                                                                
Station ID: 8725351                         PUBLICATION DATE:  11/13/2003
Name:       ESTERO ISLAND, ESTERO BAY                         
            FL
NOAA Chart: 11426                           Latitude:   26° 26.3' N (  26.43830)
USGS Quad:  FORT MYERS BEACH                Longitude:  81° 55.1' W ( -81.91830)


                             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.

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Products available at 8725351 ESTERO ISLAND, ESTERO BAY, FL

Revised: 08/08/2018
NOAA / National Ocean Service
Web site owner: Center for Operational Oceanographic Products and Services