NOAA Web Site Link Tides and Currents Home Page Transparent placeholder image

On Saturday, June 23rd, 2018 starting at 7:30 a.m to 8 p.m. EDT, there will be a system maintenance performed affecting the Tides and Currents web site (https://tidesandcurrents.noaa.gov). During this time, the Tides and Currents website will be running with limited capabilities. Click here for more information.

Bench Mark Sheet for 8720623, ANASTASIA ISLAND 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Superseded Epoch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Small blue map location marker Unpublished bench mark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  6

                                                                                
Station ID: 8720623                         PUBLICATION DATE:  04/29/2004
Name:       ANASTASIA ISLAND                                  
            FL
NOAA Chart: 11485                           Latitude:   29° 47.6' N (  29.79330)
USGS Quad:  ST. AUGUSTINE BEACH             Longitude:  81° 16.3' W ( -81.27170)


To reach the tidal bench marks from the intersection of State Route A1A and
State Route 206 in Crescent Beach, proceed north on State Route A1A for 2.4 km
(1.5 mi) to Palmetto Road, then turn left and proceed west on Palmetto Road for
0.72 km (0.45 mi) to the boat launch site.  The bench marks are along State
Route A1A, Palmetto Drive, and near the boat ramp.  The tide station was at the
end of Palmetto Road in south St. Augustine Beach at the SW corner of the dock,
which is parallel to the rock jetty at the St. Johns Public Boat Ramp Facility.


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


                 PRIMARY BENCH MARK STAMPING:  0623 B 1978
                         DESIGNATION:          872 0623 B TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:        10728
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  AQ1584
SETTING CLASSIFICATION:  Copper-clad steel rod                 OPUS PID:        
LATITUDE:   29° 47.5' N (  29.79170)          LONGITUDE:  81° 16.0' W ( -81.26670)


The primary bench mark is a disk located on the extended centerline of 5th
Street, on the south side of Palmetto Drive, 6.31 m (20.7 ft) south of the
centerline of Palmetto Drive, 4.9 m (16.1 ft) east of a utility pole, and 0.60 m
(2.0 ft) north of a witness post.  The bench mark is crimped to the top of a
copper-clad steel rod driven 9.8 m (32.0 ft) and encased in a 4-inch PVC pipe
recessed 0.1 m (0.3 ft) below the ground surface.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  2 of  6

                                                                                
Station ID: 8720623                         PUBLICATION DATE:  04/29/2004
Name:       ANASTASIA ISLAND                                  
            FL
NOAA Chart: 11485                           Latitude:   29° 47.6' N (  29.79330)
USGS Quad:  ST. AUGUSTINE BEACH             Longitude:  81° 16.3' W ( -81.27170)


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


                         BENCH MARK STAMPING:  0623 A 1978
                         DESIGNATION:          872 0623 A TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:        10727
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  AQ1585
SETTING CLASSIFICATION:  Concrete sea wall                     OPUS PID:        
LATITUDE:   29° 47.4' N (  29.79000)          LONGITUDE:  81° 16.1' W ( -81.26830)


The bench mark is a disk set in the north concrete sea wall of the boat ramp,
14.57 m (47.8 ft) west of the NW corner of the boat ramp bulkhead, 8.26 m (27.1
ft) north of the boat ramp, 5.94 m (19.5 ft) south of the centerline of Palmetto
Drive, 0.49 m (1.6 ft) NE of the top step of the boat ramp, and at ground level.



                         BENCH MARK STAMPING:  0623 C 1978
                         DESIGNATION:          872 0623 C TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:        10729
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  AQ1758
SETTING CLASSIFICATION:  Concrete post                         OPUS PID:        
LATITUDE:   29° 47.5' N (  29.79170)          LONGITUDE:  81° 15.9' W ( -81.26500)


The bench mark is a disk set in the top of a concrete post, 8.35 m (27.4 ft) SW
of the centerline of the intersection of Third Street and Palmetto Drive, 7.10 m
(23.3 ft) south of the centerline of Palmetto Drive, 5.00 m (16.4 ft) west of
the extended center of 3rd Street, 0.79 m (2.6 ft) east of a utility pole with 3
guy cables, 0.30 m (1.0 ft) north of a witness post, and 0.06 m (0.2 ft) above
ground level.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  3 of  6

                                                                                
Station ID: 8720623                         PUBLICATION DATE:  04/29/2004
Name:       ANASTASIA ISLAND                                  
            FL
NOAA Chart: 11485                           Latitude:   29° 47.6' N (  29.79330)
USGS Quad:  ST. AUGUSTINE BEACH             Longitude:  81° 16.3' W ( -81.27170)


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


                         BENCH MARK STAMPING:  W 321 1970
                         DESIGNATION:          W 321

MONUMENTATION:           Bench Mark disk                       VM#:        10731
AGENCY:                  US Coast and Geodetic Survey
                         (USC&GS)                              IDB PID#:  AQ0363
SETTING CLASSIFICATION:  Concrete post                         OPUS PID:        
LATITUDE:   29° 47.3' N (  29.78830)          LONGITUDE:  81° 15.6' W ( -81.26000)


The bench mark is a disk set in the top of a concrete post, 73.15 m (240.0 ft)
south of the extended centerline of Mary Street heading east to Ocean Beach,
13.69 m (44.9 ft) west of the centerline of Florida A1A, 9.30 m (30.5 ft) east
of a chain-link fence corner, 0.70 m (2.3 ft) south of a witness post, and 0.40
m (1.3 ft) north of a utility pole with a transformer.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  4 of  6

                                                                                
Station ID: 8720623                         PUBLICATION DATE:  04/29/2004
Name:       ANASTASIA ISLAND                                  
            FL
NOAA Chart: 11485                           Latitude:   29° 47.6' N (  29.79330)
USGS Quad:  ST. AUGUSTINE BEACH             Longitude:  81° 16.3' W ( -81.27170)


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


                         BENCH MARK STAMPING:  X 321 1970
                         DESIGNATION:          X 321

MONUMENTATION:           Bench Mark disk                       VM#:        10732
AGENCY:                  US Coast and Geodetic Survey
                         (USC&GS)                              IDB PID#:  AQ0359
SETTING CLASSIFICATION:  Concrete post                         OPUS PID:        
LATITUDE:   29° 48.1' N (  29.80170)          LONGITUDE:  81° 15.9' W ( -81.26500)


The bench mark is a disk set in the top of a concrete post, 46.79 m (153.5 ft)
south of the extended centerline of Palmetto Avenue, 13.99 m (45.9 ft) west of
the centerline of State Route A1A, 0.49 m (1.6 ft) north of a utility pole with
a transformer and one guy cable, 0.30 m (1.0 ft) east of a witness post, and 0.3
m (1 ft) below the level of the highway.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  5 of  6

                                                                                
Station ID: 8720623                         PUBLICATION DATE:  04/29/2004
Name:       ANASTASIA ISLAND                                  
            FL
NOAA Chart: 11485                           Latitude:   29° 47.6' N (  29.79330)
USGS Quad:  ST. AUGUSTINE BEACH             Longitude:  81° 16.3' W ( -81.27170)


                            T I D A L   D A T U M S 


Tidal datums at ANASTASIA ISLAND based on:

     LENGTH OF SERIES:      1 MONTH
     TIME PERIOD:           October 1978 - October 1978
     TIDAL EPOCH:           1983-2001
     CONTROL TIDE STATION:  8720220 MAYPORT


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

     MEAN HIGHER HIGH WATER                     MHHW   =  1.534
     MEAN HIGH WATER                            MHW    =  1.436
     North American Vertical Datum              NAVD88 =  0.875
     MEAN SEA LEVEL                             MSL    =  0.764
     MEAN TIDE LEVEL                            MTL    =  0.745
     MEAN LOW WATER                             MLW    =  0.054
     MEAN LOWER LOW WATER                       MLLW   =  0.000

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     0623 B 1978                                 2.035    0.599
     0623 A 1978                                 2.203    0.767
     0623 C 1978                                 2.151    0.715
     W 321 1970                                  2.290    0.854
     X 321 1970                                  2.659    1.223


                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  6 of  6

                                                                                
Station ID: 8720623                         PUBLICATION DATE:  04/29/2004
Name:       ANASTASIA ISLAND                                  
            FL
NOAA Chart: 11485                           Latitude:   29° 47.6' N (  29.79330)
USGS Quad:  ST. AUGUSTINE BEACH             Longitude:  81° 16.3' W ( -81.27170)


                             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.

Return to Top
Products available at 8720623 ANASTASIA ISLAND, FL

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