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Bench Mark Sheet for 8724192, BIG PINE KEY, COUPON BIGHT INSIDE 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Superseded Epoch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Small blue map location marker Unpublished bench mark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: 8724192                         PUBLICATION DATE:  02/05/2004
Name:       BIG PINE KEY, COUPON BIGHT INSIDE                 
            FL
NOAA Chart: 11448                           Latitude:   24° 39.1' N (  24.65170)
USGS Quad:  BIG PINE KEY                    Longitude:  81° 21.0' W ( -81.35000)


To reach the tidal bench marks from the west end of the U.S. Highway 1 bridge
crossing Spanish Harbor, proceed NW on U.S. Highway 1 for 1.1 km (0.7 mi) to a
prominent sand berm projecting westerly into Coupon Bight.  The bench marks are
along the sand berm, 0.3 km (0.2 mi) SE of two small mangrove islands in the
bight.  The tide station was SW of the western tip of the sand berm and due
south of the two small mangrove islands in the bight.


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


                 PRIMARY BENCH MARK STAMPING:  NO 1 1974
                         DESIGNATION:          872 4192 TIDAL 1

MONUMENTATION:           Tidal Station disk                    VM#:         6411
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:        
SETTING CLASSIFICATION:  Copper-clad steel rod                 OPUS PID:        
LATITUDE:   24° 39.1' N (  24.65170)          LONGITUDE:  81° 21.0' W ( -81.35000)


The primary bench mark is a disk located on a sand berm on a prominent point on
Bights's east shore, 21 m (70 ft) SE of the NW point of the sand berm, 14 m (45
ft) NE of the SW edge of mangroves, 8 m (26 ft) NE of the approximate high water
line along the western shore, and 0.21 m (0.7 ft) west of a witness post.  The
bench mark is set 27 cm (0.9 ft) above ground level, crimped to the top of a
copper-clad steel rod driven an unspecified depth to refusal, and encased in a
4-inch steel pipe.

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

                                                                                
Station ID: 8724192                         PUBLICATION DATE:  02/05/2004
Name:       BIG PINE KEY, COUPON BIGHT INSIDE                 
            FL
NOAA Chart: 11448                           Latitude:   24° 39.1' N (  24.65170)
USGS Quad:  BIG PINE KEY                    Longitude:  81° 21.0' W ( -81.35000)


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


                         BENCH MARK STAMPING:  NO 2 1974
                         DESIGNATION:          872 4192 TIDAL 2

MONUMENTATION:           Tidal Station disk                    VM#:         6412
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:        
SETTING CLASSIFICATION:  Copper-clad steel rod                 OPUS PID:        
LATITUDE:   24° 39.1' N (  24.65170)          LONGITUDE:  81° 21.0' W ( -81.35000)


The bench mark is a disk located on a sand berm on a prominent point on Bights's
east shore, 20 m (66 ft) SE of bench mark NO 1 1974, 13.72 m (45.0 ft) NE of the
SW edge of mangroves, 8 m (27 ft) NE of the approximate high water line along
the western shore, and 0.46 m (1.5 ft) SW of a witness post.  The bench mark is
set 21 cm (0.7 ft) above ground level, crimped to the top of a copper-clad steel
rod driven an unspecified depth to refusal, and encased in a 4-inch steel pipe.



                         BENCH MARK STAMPING:  NO 3 1974
                         DESIGNATION:          872 4192 TIDAL 3

MONUMENTATION:           Tidal Station disk                    VM#:         6413
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:        
SETTING CLASSIFICATION:  Copper-clad steel rod                 OPUS PID:        
LATITUDE:   24° 39.1' N (  24.65170)          LONGITUDE:  81° 21.0' W ( -81.35000)


The bench mark is a disk located on a sand berm on a prominent point on Bights's
east shore, 15 m (50 ft) NE of the outer edge of mangroves, 13 m (42 ft) SE of
bench mark NO 5 1974, 0.15 m (0.5 ft) SW of a witness post.  The bench mark is
set 12 cm (0.4 ft) above ground level, crimped to the top of a copper-clad rod
driven an unspecified depth to refusal.

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

                                                                                
Station ID: 8724192                         PUBLICATION DATE:  02/05/2004
Name:       BIG PINE KEY, COUPON BIGHT INSIDE                 
            FL
NOAA Chart: 11448                           Latitude:   24° 39.1' N (  24.65170)
USGS Quad:  BIG PINE KEY                    Longitude:  81° 21.0' W ( -81.35000)


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


                         BENCH MARK STAMPING:  NO 4 1974
                         DESIGNATION:          872 4192 TIDAL 4

MONUMENTATION:           Tidal Station disk                    VM#:         6414
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:        
SETTING CLASSIFICATION:  Copper-clad steel rod                 OPUS PID:        
LATITUDE:   24° 39.1' N (  24.65170)          LONGITUDE:  81° 21.0' W ( -81.35000)


The bench mark is a disk located on a sand berm on a prominent point on Bights's
east shore, 90 m (296 ft) SE of the NW point of the sand berm, 19.51 m (64.0 ft)
SE of bench mark NO 3 1974, 14.02 m (46.0 ft) NE of the outer edge of mangroves,
3.2 m (10.5 ft) NE of the approximate high water line of the western shore, and
0.30 m (1.0 ft) SW of a witness post.  The bench mark is set 6 cm (0.2 ft) above
ground level, crimped to the top of a copper-clad rod driven an unspecified
depth to refusal.



                         BENCH MARK STAMPING:  NO 5 1974
                         DESIGNATION:          872 4192 TIDAL 5

MONUMENTATION:           Tidal Station disk                    VM#:         6415
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:        
SETTING CLASSIFICATION:  Copper-clad steel rod                 OPUS PID:        
LATITUDE:   24° 39.1' N (  24.65170)          LONGITUDE:  81° 21.0' W ( -81.35000)


The bench mark is a disk located on a sand berm on a prominent point on Bights's
east shore, 18 m (58 ft) NE of the outer edge of mangroves, 16.00 m (52.5 ft) SE
of bench mark NO 2 1974, 11 m (35 ft) NE of the approximate high water line of
the western shore, 3 m (9 ft) west of the low marsh area, and 0.40 m (1.3 ft) SW
of a witness post.  The bench mark is set 12 cm (0.4 ft) above ground level,
crimped to the top of a copper-clad rod driven an unspecified depth to refusal.

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

                                                                                
Station ID: 8724192                         PUBLICATION DATE:  02/05/2004
Name:       BIG PINE KEY, COUPON BIGHT INSIDE                 
            FL
NOAA Chart: 11448                           Latitude:   24° 39.1' N (  24.65170)
USGS Quad:  BIG PINE KEY                    Longitude:  81° 21.0' W ( -81.35000)


                            T I D A L   D A T U M S 


Tidal datums at BIG PINE KEY, COUPON BIGHT INSIDE based on:

     LENGTH OF SERIES:      1 MONTH
     TIME PERIOD:           October 1974 - October 1974
     TIDAL EPOCH:           1983-2001
     CONTROL TIDE STATION:  8724580 KEY WEST


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

     MEAN HIGHER HIGH WATER                     MHHW   =  0.482
     MEAN HIGH WATER                            MHW    =  0.401
     MEAN SEA LEVEL                             MSL    =  0.223
     MEAN TIDE LEVEL                            MTL    =  0.219
     MEAN LOW WATER                             MLW    =  0.037
     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 1974                                   1.143    0.742
     NO 2 1974                                   1.274    0.873
     NO 3 1974                                   1.193    0.792
     NO 4 1974                                   0.910    0.509
     NO 5 1974                                   1.266    0.865


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

                                                                                
Station ID: 8724192                         PUBLICATION DATE:  02/05/2004
Name:       BIG PINE KEY, COUPON BIGHT INSIDE                 
            FL
NOAA Chart: 11448                           Latitude:   24° 39.1' N (  24.65170)
USGS Quad:  BIG PINE KEY                    Longitude:  81° 21.0' W ( -81.35000)


                             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 8724192 BIG PINE KEY, COUPON BIGHT INSIDE, FL

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