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Bench Mark Sheet for 8723465, EAST ARSENICKER, CARD SOUND 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Superseded Epoch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Small blue map location marker Unpublished bench mark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: 8723465                         PUBLICATION DATE:  05/12/2004
Name:       EAST ARSENICKER, CARD SOUND                       
            FL
NOAA Chart: 11462                           Latitude:   25° 22.4' N (  25.37330)
USGS Quad:  ARSENICKER KEYS                 Longitude:  80° 17.4' W ( -80.29000)


To reach the tidal bench marks by boat from the Intracoastal Waterway light
number 14, proceed 1.3 km (0.7 nm) NW to the SW corner of East Arsenicker Key. 
The bench marks are located in the vicinity of a clearing and a small beach on
the SW side of the island.  The tide gage and staff were located on the edge of
a mangrove buildup off the extreme SW corner of East Arsenicker Key.


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


                 PRIMARY BENCH MARK STAMPING:  NO 2 1971
                         DESIGNATION:          872 3465 TIDAL 2

MONUMENTATION:           Tidal Station disk                    VM#:         5870
AGENCY:                  US Coast and Geodetic Survey
                         (USC&GS)                              IDB PID#:        
SETTING CLASSIFICATION:  Copper-clad steel rod                 OPUS PID:        
LATITUDE:   25° 22.4' N (  25.37330)          LONGITUDE:  80° 17.5' W ( -80.29170)


The primary bench mark is a disk located 11.89 m (39.0 ft) ESE of bench mark NO
1 1971, 6.25 m (20.5 ft) NW of a "Y" shaped tree trunk, 1.83 m (6.0 ft) ) north
of the apparent shoreline, and 0.24 m (0.8 ft) south 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 3.7 m (12 ft) to refusal, and encased in a 4-inch PVC
pipe that projects 0.24 m (0.8 ft) above the ground and concrete kickblock.

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

                                                                                
Station ID: 8723465                         PUBLICATION DATE:  05/12/2004
Name:       EAST ARSENICKER, CARD SOUND                       
            FL
NOAA Chart: 11462                           Latitude:   25° 22.4' N (  25.37330)
USGS Quad:  ARSENICKER KEYS                 Longitude:  80° 17.4' W ( -80.29000)


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


                         BENCH MARK STAMPING:  NO 3 1971
                         DESIGNATION:          872 3465 TIDAL 3

MONUMENTATION:           Tidal Station disk                    VM#:         5871
AGENCY:                  US Coast and Geodetic Survey
                         (USC&GS)                              IDB PID#:        
SETTING CLASSIFICATION:  Copper-clad steel rod                 OPUS PID:        
LATITUDE:   25° 22.4' N (  25.37330)          LONGITUDE:  80° 17.5' W ( -80.29170)


The bench mark is a disk located in the only clearing and beach on the island,
33.95 m (111.4 ft) east of bench mark NO 1 1971, 22.71 m (74.5 ft) east of bench
mark NO 2 1971, 1.65 m (5.4 ft) NW of a 0.61 m (2.0 ft) diameter tree, 1.52 m
(5.0 ft) north of the apparent shoreline,  and 0.27 m (0.9 ft) south 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 steel rod driven 3.7 m (12 ft) to refusal, and
encased in a 4-inch PVC pipe and concrete kickblock.



                         BENCH MARK STAMPING:  3465 D 1984
                         DESIGNATION:          872 3465 D TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         5872
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Stainless steel rod                   OPUS PID:        
LATITUDE:   25° 22.4' N (  25.37330)          LONGITUDE:  80° 17.5' W ( -80.29170)


The bench mark is a disk located 16 m (52 ft) WNW of bench mark NO 3 1971, 8.44
m (27.7 ft) ENE of bench mark NO 2 1971, 3.66 m (12.0 ft) west of a 0.61 m (2.0
ft) diameter tree, 3 m (10 ft) NNE of the waterline, and 0.46 m (1.5 ft) south
of a witness post.  The bench mark is set 9 cm (0.3 ft) above ground level,
crimped to the top of a stainless steel rod driven 9.1 m (30 ft) to refusal,
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: 8723465                         PUBLICATION DATE:  05/12/2004
Name:       EAST ARSENICKER, CARD SOUND                       
            FL
NOAA Chart: 11462                           Latitude:   25° 22.4' N (  25.37330)
USGS Quad:  ARSENICKER KEYS                 Longitude:  80° 17.4' W ( -80.29000)


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


                         BENCH MARK STAMPING:  3465 E 1984
                         DESIGNATION:          872 3465 E TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         5873
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Stainless steel rod                   OPUS PID:        
LATITUDE:   25° 22.4' N (  25.37330)          LONGITUDE:  80° 17.5' W ( -80.29170)


The bench mark is a disk located 12.25 m (40.2 ft) WNW of bench mark 3465 D
1984, 9.66 m (31.7 ft) NNW of bench mark NO 2 1971, and 0.40 m (1.3 ft) south of
a witness post.  The bench mark is set 9 cm (0.3 ft) above ground level, crimped
to the top of a stainless steel rod driven 8.5 m (28 ft) to refusal, encased in
a PVC pipe and concrete kickblock.



                         BENCH MARK STAMPING:  NO 1 1971
                         DESIGNATION:          872 3465 TIDAL 1

MONUMENTATION:           Tidal Station disk                    VM#:        15835
AGENCY:                  US Coast and Geodetic Survey
                         (USC&GS)                              IDB PID#:        
SETTING CLASSIFICATION:  Unspecified deep rod                  OPUS PID:        
LATITUDE:   25° 22.4' N (  25.37330)          LONGITUDE:  80° 17.5' W ( -80.29170)


The bench mark is a disk located at the extreme SW end of the key, 6.16 m (20.2
ft) NW of a large tree with a Y-shaped trunk, 2 m (6 ft) east of the shoreline,
3 m (11 ft) south of the mangrove line, and 0.37 m (1.2 ft) east of a witness
post.  The bench mark is set 15 cm (0.5 ft) below ground level, crimped to the
top of an unspecified steel rod driven 3.7 m (12 ft) to refusal, and encased in
a concrete filled pipe that projects 0.15 m (0.5 ft) above ground level.

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

                                                                                
Station ID: 8723465                         PUBLICATION DATE:  05/12/2004
Name:       EAST ARSENICKER, CARD SOUND                       
            FL
NOAA Chart: 11462                           Latitude:   25° 22.4' N (  25.37330)
USGS Quad:  ARSENICKER KEYS                 Longitude:  80° 17.4' W ( -80.29000)


                            T I D A L   D A T U M S 


Tidal datums at EAST ARSENICKER, CARD SOUND based on:

     LENGTH OF SERIES:      3 MONTHS
     TIME PERIOD:           December 1971 - February 1972
     TIDAL EPOCH:           1983-2001
     CONTROL TIDE STATION:  8723289 CUTLER, BISCAYNE BAY


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

     MEAN HIGHER HIGH WATER                     MHHW   =  0.310
     MEAN HIGH WATER                            MHW    =  0.295
     MEAN TIDE LEVEL                            MTL    =  0.160
     MEAN SEA LEVEL                             MSL    =  0.155
     MEAN LOW WATER                             MLW    =  0.024
     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 2 1971                                   0.655    0.360
     NO 3 1971                                   0.780    0.485
     3465 D 1984                                 0.473    0.178
     3465 E 1984                                 0.353    0.058
     NO 1 1971                                   0.726    0.431


Foot Notes:

Bench marks 3465 D 1984 and 3465 E 1984 are based on one differential leveling
connection and do not meet the quality control standards of the NOS. Therefore,
caution should be used when deriving elevations for these marks.

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

                                                                                
Station ID: 8723465                         PUBLICATION DATE:  05/12/2004
Name:       EAST ARSENICKER, CARD SOUND                       
            FL
NOAA Chart: 11462                           Latitude:   25° 22.4' N (  25.37330)
USGS Quad:  ARSENICKER KEYS                 Longitude:  80° 17.4' W ( -80.29000)


                             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 8723465 EAST ARSENICKER, CARD SOUND, FL

Revised: 08/08/2018
NOAA / National Ocean Service
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