Bench Mark Sheet for 8721147, Ponce De Leon Inlet South 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Superseded Epoch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Small blue map location marker Unpublished bench mark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  7

                                                                                
Station ID: 8721147                         PUBLICATION DATE:  11/22/2010
Name:       PONCE DE LEON INLET SOUTH                         
            FL
NOAA Chart: 11484                           Latitude:   29°  3.8' N (  29.06330)
USGS Quad:  NEW SMYRNA BEACH                Longitude:  80° 54.9' W ( -80.91500)


To reach the tidal bench marks from the intersection of State Highway 44 East
(Live Oak Avenue) and State Highway A1A (Lytle Avenue) in New Smyrna Beach, go
east on State Highway A1A (Lytle Avenue) for 1.93 km (1.2 mi) to the junction of
Peninsula Avenue on the left, turn left on Peninsula Avenue and go North for
0.97 km (0.6 mi) to the intersection of State Highway 44 (Flagler Avenue),
continue north on Peninsula Avenue for 3.22 km (2.0 mi) to the entrance of the
Ponce de Leon Inlet Coast Guard Station, passing through the gate, go west for
about 48.77 m (160.0 ft) to the first drive on the left, turn left on the drive
and go south for about 48.77 m (160.0 ft) to the seawall.  The tidal bench marks
are in the general vicinity of the seawall, just east of the boat ramp and the
end of truck travel, now by walking, go south for about 17.68 m (58.0 ft) where
the tide gauge is attached to the southwest end of a wooden dock.


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


                 PRIMARY BENCH MARK STAMPING:  1 1973
                         DESIGNATION:          872 1147 TIDAL 1

MONUMENTATION:           Tidal Station disk                    VM#:         5296
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  AQ1522
SETTING CLASSIFICATION:  Seawall                               OPUS PID#: AQ1522
LATITUDE:   29°  3.8' N (  29.06306)          LONGITUDE:  80° 54.9' W ( -80.91444)


The primary bench mark is a disk set flush in the top of the south sea wall,
near the SW corner of a fuel storage area barrier wall, about 0.46 m (1.5 ft)
below the level of the driveway, 115.82 m (380.0 ft) SW of bench mark 1147 B
1996, 69.49 m (228.0 ft) SE of bench mark 1147 A 1996, 54.86 m (180.0 ft) west
of the SE end of the sea wall, 14.60 m (47.9 ft) SW of the SW corner of the fuel
storage area barrier wall, 13.14 m (43.1 ft) east of the SE corner of the boat
ramp, 0.30 m south of a carsonite witness post, and 0.27 m (0.9 ft) north of the
north face of the sea wall.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  2 of  7

                                                                                
Station ID: 8721147                         PUBLICATION DATE:  11/22/2010
Name:       PONCE DE LEON INLET SOUTH                         
            FL
NOAA Chart: 11484                           Latitude:   29°  3.8' N (  29.06330)
USGS Quad:  NEW SMYRNA BEACH                Longitude:  80° 54.9' W ( -80.91500)


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


                         BENCH MARK STAMPING:  4 1973
                         DESIGNATION:          872 1147 TIDAL 4

MONUMENTATION:           Tidal Station disk                    VM#:         5299
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  AQ1803
SETTING CLASSIFICATION:  Concrete building base                OPUS PID:        
LATITUDE:   29°  3.9' N (  29.06417)          LONGITUDE:  80° 54.9' W ( -80.91417)


The bench mark is a disk set flush in a concrete foundation near the center of
the east side of the garage in the garage doorway, 0.15 m (0.5 ft) south of the
south side of the center building support between the two center doorways.



                         BENCH MARK STAMPING:  1147 A 1996
                         DESIGNATION:          872 1147 A TIDAL

MONUMENTATION:           Flange-encased Rod                    VM#:        18054
AGENCY:                  FL Department of Environmental
                         Protection (FLDEP)                    IDB PID#:  DK6692
SETTING CLASSIFICATION:  Stainless steel rod                   OPUS PID#: DK6692
LATITUDE:   29°  3.8' N (  29.06333)          LONGITUDE:  80° 54.9' W ( -80.91556)


The bench mark is a flange-encased rod located just east of the boat ramp and
the end of truck travel, 69.49 m (228.0 ft) west of bench mark  1 1973, about
63.40 m (208.0 ft) WNW of the tide gage, 4.02 m (13.2 ft) NE of the SW corner of
the sea wall, 3.35 m (11.0 ft) NE of a carsonite witness post, 3.14 m (10.3 ft)
north of the south edge of the sea wall, and 2.99 m (9.8 ft) SW of the SW corner
of the helicopter pad.  The datum point is recessed 0.09 m (0.3 ft) below the
level of the NGS logo cap, being the top of a stainless steel rod, driven to
refusal at a depth of 14.6 m (48 ft), and encased in a 5 inch NGS logo cap
containing a magnet flush with the ground.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  3 of  7

                                                                                
Station ID: 8721147                         PUBLICATION DATE:  11/22/2010
Name:       PONCE DE LEON INLET SOUTH                         
            FL
NOAA Chart: 11484                           Latitude:   29°  3.8' N (  29.06330)
USGS Quad:  NEW SMYRNA BEACH                Longitude:  80° 54.9' W ( -80.91500)


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


                         BENCH MARK STAMPING:  1147 B 1996
                         DESIGNATION:          872 1147 B TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:        18055
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  DK6690
SETTING CLASSIFICATION:  Navigation structure base             OPUS PID:        
LATITUDE:   29°  3.8' N (  29.06389)          LONGITUDE:  80° 54.8' W ( -80.91278)


The bench mark is a disk set flush in the SW corner of the concrete base of a
navigation aid structure, west of the stations property fence, the concrete base
projecting about 0.15 m (0.5 ft) above the level of the ground, about 134.11 m
(440.0 ft) ESE of bench mark 4 1973, about 115.82 m (380.0 ft) NE of bench mark
1 1973, 19.96 m (65.5 ft) NE of the NE corner of the Billeting and Dining Hall
Building, 6.71 m (22.0 ft) SW of the approximate centerline of the south
entrance gate, 5.54 m (18.2 ft) west of a 6.0 ft tall chain link property line
fence, 4.33 m (14.2 ft) south of the approximate centerline of the station road,
0.18 m (0.6 ft) NE of the SW corner of the concrete base, and 0.18 m (0.6 ft)
east of a carsonite witness post.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  4 of  7

                                                                                
Station ID: 8721147                         PUBLICATION DATE:  11/22/2010
Name:       PONCE DE LEON INLET SOUTH                         
            FL
NOAA Chart: 11484                           Latitude:   29°  3.8' N (  29.06330)
USGS Quad:  NEW SMYRNA BEACH                Longitude:  80° 54.9' W ( -80.91500)


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


                         BENCH MARK STAMPING:  1147 C 1996
                         DESIGNATION:          872 1147 C TIDAL

MONUMENTATION:           Flange-encased Rod                    VM#:        18056
AGENCY:                  FL Department of Environmental
                         Protection (FLDEP)                    IDB PID#:  DK6689
SETTING CLASSIFICATION:  Stainless steel rod                   OPUS PID:        
LATITUDE:   29°  3.9' N (  29.06528)          LONGITUDE:  80° 54.9' W ( -80.91500)


The bench mark is a flange-encased rod located 97.84 m (321.0 ft) NE of bench
mark 4 1973, 4.15 m (13.6 ft) SW of the approximate centerline of the north
gate, 3.87 m (12.7 ft) south of the approximate centerline of the coast guard
station road, 1.10 m (3.6 ft) west of  a 1.8 m (6 ft) tall chain link property
fence line, and 1.01 m (3.3 ft) west of a carsonite witness post.  The datum
point is recessed 0.09 m (0.3 ft) below the level of the NGS logo cap, being the
top of a stainless steel rod, driven to refusal at a depth of 15.5 m (51 ft),
and encased in a 5 inch NGS logo cap containing a magnet flush with the ground.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  5 of  7

                                                                                
Station ID: 8721147                         PUBLICATION DATE:  11/22/2010
Name:       PONCE DE LEON INLET SOUTH                         
            FL
NOAA Chart: 11484                           Latitude:   29°  3.8' N (  29.06330)
USGS Quad:  NEW SMYRNA BEACH                Longitude:  80° 54.9' W ( -80.91500)


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


                         BENCH MARK STAMPING:  PDI-26 1974 JAX FLA
                         DESIGNATION:          PDI 26

MONUMENTATION:           Survey disk                           VM#:        18058
AGENCY:                  US Army Corps of Engineers (USE)      IDB PID#:  DK6691
SETTING CLASSIFICATION:  Concrete Pad                          OPUS PID#: DK6691
LATITUDE:   29°  3.8' N (  29.06306)          LONGITUDE:  80° 54.9' W ( -80.91500)


The bench mark is a disk set in the SW corner of the concrete helicopter pad,
11.28 m (37.0 ft) south of the NW corner of the concrete helicopter pad, 7.32 m
(24.0 ft) NNW of a carsonite witness post for bench mark 1147 A 1996, 4.27 m
(14.0 ft) north of a concrete sea wall, 3.96 m (13.0 ft) NNE of bench mark 1147
A 1996, and 0.91 m (3.0 ft) NNE of the SW corner of the helicopter pad.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  6 of  7

                                                                                
Station ID: 8721147                         PUBLICATION DATE:  11/22/2010
Name:       PONCE DE LEON INLET SOUTH                         
            FL
NOAA Chart: 11484                           Latitude:   29°  3.8' N (  29.06330)
USGS Quad:  NEW SMYRNA BEACH                Longitude:  80° 54.9' W ( -80.91500)


                            T I D A L   D A T U M S 


Tidal datums at PONCE DE LEON INLET SOUTH based on:

     LENGTH OF SERIES:      7 MONTHS
     TIME PERIOD:           April 2006 - October 2006
     TIDAL EPOCH:           1983-2001
     CONTROL TIDE STATION:  8721604 TRIDENT PIER, PORT CANAVERAL


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

     MEAN HIGHER HIGH WATER                     MHHW   =  1.056
     MEAN HIGH WATER                            MHW    =  0.969
     North American Vertical Datum              NAVD88 =  0.784
     MEAN SEA LEVEL                             MSL    =  0.509
     MEAN TIDE LEVEL                            MTL    =  0.506
     MEAN LOW WATER                             MLW    =  0.043
     MEAN LOWER LOW WATER                       MLLW   =  0.000

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     1 1973                                      1.458    0.489
     4 1973                                      3.427    2.458
     1147 A 1996                                 1.648    0.679
     1147 B 1996                                 2.640    1.672
     1147 C 1996                                 2.191    1.222
     PDI-26 1974 JAX FLA                         1.793    0.824


                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  7 of  7

                                                                                
Station ID: 8721147                         PUBLICATION DATE:  11/22/2010
Name:       PONCE DE LEON INLET SOUTH                         
            FL
NOAA Chart: 11484                           Latitude:   29°  3.8' N (  29.06330)
USGS Quad:  NEW SMYRNA BEACH                Longitude:  80° 54.9' W ( -80.91500)


                             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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