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Bench Mark Sheet for 8725541, BOKEELIA, CHARLOTTE HARBOR 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Superseded Epoch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Small blue map location marker Unpublished bench mark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: 8725541                         PUBLICATION DATE:  03/06/2017
Name:       BOKEELIA, CHARLOTTE HARBOR                        
            FL
NOAA Chart: 11426                           Latitude:   26° 42.4' N (  26.70670)
USGS Quad:  BOKEELIA                        Longitude:  82°  9.8' W ( -82.16330)


To reach the tidal bench marks from the Post Office in Bokeelia, proceed NW on
Main Street for 0.56 km (0.35 mi).  The bench marks are along Main Street and at
the Post Office.  The tide gage and staff were on a private pier across Main
Street from the Crab Shack Restaurant.


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


                 PRIMARY BENCH MARK STAMPING:  5541 A 1989
                         DESIGNATION:          872 5541 A TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         7360
AGENCY:                  National Ocean Service (NOS)          IDB PID#:  AG9431
SETTING CLASSIFICATION:  Stainless steel rod                   OPUS PID:        
LATITUDE:   26° 42.3' N (  26.70500)          LONGITUDE:  82°  9.3' W ( -82.15500)


The primary bench mark is a disk located 36.61 m (120.1 ft) east of the extended
centerline of a private pier, 35 m (115 ft) NE of bench mark RMC 14 MSL 1946,
18.17 m (59.6 ft) north of the centerline of Main Street, 7.50 m (24.6 ft) south
of the north edge of the sea wall, and 0.21 m (0.7 ft) east of a witness post. 
The bench mark is crimped to a stainless steel rod driven 26.8 m (88 ft) to
refusal, and encased in a PVC pipe and concrete kickblock.

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

                                                                                
Station ID: 8725541                         PUBLICATION DATE:  03/06/2017
Name:       BOKEELIA, CHARLOTTE HARBOR                        
            FL
NOAA Chart: 11426                           Latitude:   26° 42.4' N (  26.70670)
USGS Quad:  BOKEELIA                        Longitude:  82°  9.8' W ( -82.16330)


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


                         BENCH MARK STAMPING:  RMC 14 MSL 1946
                         DESIGNATION:          RMC 14 MSL

MONUMENTATION:           Survey disk                           VM#:         7359
AGENCY:                  US Harbor Survey (USHS)               IDB PID#:  AG9432
SETTING CLASSIFICATION:  Concrete monument                     OPUS PID:        
LATITUDE:   26° 42.3' N (  26.70500)          LONGITUDE:  82°  9.3' W ( -82.15500)


The bench mark is a disk set in a round concrete monument, 10.91 m (35.8 ft)
west of the centerline of unpaved Starboard Drive, 8.02 m (26.3 ft) south of the
centerline of Main Street, and 0.43 m (1.4 ft) east of Crab Shack Gift Shop.



                         BENCH MARK STAMPING:  5541 B 1989
                         DESIGNATION:          872 5541 B TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         7361
AGENCY:                  National Ocean Service (NOS)          IDB PID#:  AG9433
SETTING CLASSIFICATION:  Stainless steel rod                   OPUS PID:        
LATITUDE:   26° 42.3' N (  26.70500)          LONGITUDE:  82°  9.3' W ( -82.15500)


The bench mark is a disk located NW of the intersection of Main Street and H.
Stringfellow Road, 14.81 m (48.6 ft) south of the NE corner of a sea wall, 4.39
m (14.4 ft) north of the centerline of Main Street, 0.37 m (1.2 ft) west of a
large cactus plant, and 0.3 m (1.0 ft) south of a witness post.  The bench mark
is crimped to a stainless steel rod driven 24.1 m (79 ft) to refusal, and
encased in a PVC pipe and concrete kickblock.

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

                                                                                
Station ID: 8725541                         PUBLICATION DATE:  03/06/2017
Name:       BOKEELIA, CHARLOTTE HARBOR                        
            FL
NOAA Chart: 11426                           Latitude:   26° 42.4' N (  26.70670)
USGS Quad:  BOKEELIA                        Longitude:  82°  9.8' W ( -82.16330)


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


                         BENCH MARK STAMPING:  5541 C 1989
                         DESIGNATION:          872 5541 C TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         7362
AGENCY:                  National Ocean Service (NOS)          IDB PID#:  AG9434
SETTING CLASSIFICATION:  Stainless steel rod                   OPUS PID:        
LATITUDE:   26° 42.3' N (  26.70500)          LONGITUDE:  82°  9.3' W ( -82.15500)


The bench mark is a disk located NW of the intersection of Main Street and H.
Stringfellow Road, 54.53 m (178.9 ft) south of the centerline of Main Street,
25.45 m (83.5 ft) west of the centerline of the entrance road to Bocilla Island
Club, and 12.83 m (42.1 ft) east of a 0.61 m (2.0 ft) diameter Australian pine
tree.  The bench mark is at ground level, crimped to a stainless steel rod
driven 13.4 m (44 ft) to refusal, and encased in a PVC pipe and concrete
kickblock.



                         BENCH MARK STAMPING:  5541 D 1989
                         DESIGNATION:          872 5541 D TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         7363
AGENCY:                  National Ocean Service (NOS)          IDB PID#:  AG9435
SETTING CLASSIFICATION:  Concrete platform                     OPUS PID:        
LATITUDE:   26° 42.3' N (  26.70500)          LONGITUDE:  82°  9.2' W ( -82.15330)


The bench mark is a disk set in the concrete loading platform behind the Post
Office, 2.29 m (7.5 ft) north of the south edge of the platform, 1.80 m (5.9 ft)
from the center of the back door of the post office, and 1.10 m (3.6 ft) east of
the west edge of the platform.

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

                                                                                
Station ID: 8725541                         PUBLICATION DATE:  03/06/2017
Name:       BOKEELIA, CHARLOTTE HARBOR                        
            FL
NOAA Chart: 11426                           Latitude:   26° 42.4' N (  26.70670)
USGS Quad:  BOKEELIA                        Longitude:  82°  9.8' W ( -82.16330)


                            T I D A L   D A T U M S 


Tidal datums at BOKEELIA, CHARLOTTE HARBOR based on:

     LENGTH OF SERIES:      2 MONTHS
     TIME PERIOD:           June 1989 - July 1989
     TIDAL EPOCH:           1983-2001
     CONTROL TIDE STATION:  8725520 FORT MYERS, CALOOSAHATCHEE RIVER


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

     MEAN HIGHER HIGH WATER                     MHHW   =  0.526
     North American Vertical Datum              NAVD88 =  0.495
     MEAN HIGH WATER                            MHW    =  0.481
     MEAN SEA LEVEL                             MSL    =  0.281
     MEAN TIDE LEVEL                            MTL    =  0.277
     MEAN LOW WATER                             MLW    =  0.072
     MEAN LOWER LOW WATER                       MLLW   =  0.000

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     5541 A 1989                                 0.809    0.328
     RMC 14 MSL 1946                             1.160    0.679
     5541 B 1989                                 0.892    0.411
     5541 C 1989                                 0.993    0.512
     5541 D 1989                                 1.473    0.992


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

                                                                                
Station ID: 8725541                         PUBLICATION DATE:  03/06/2017
Name:       BOKEELIA, CHARLOTTE HARBOR                        
            FL
NOAA Chart: 11426                           Latitude:   26° 42.4' N (  26.70670)
USGS Quad:  BOKEELIA                        Longitude:  82°  9.8' W ( -82.16330)


                             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 8725541 BOKEELIA, CHARLOTTE HARBOR, FL

Revised: 10/15/2013
NOAA / National Ocean Service
Web site owner: Center for Operational Oceanographic Products and Services