Superseded Bench Mark Sheet for 8726819, OZONA FL

Present Epoch

Printable version

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
Datums Page                                                        Page  1 of  5

                                                   PUBLICATION DATE:  10/11/1988
Station ID: 8726819                                SUPERCEDED DATE:   04/21/2003
Name:       SPECKLED TROUT FISH CAMP, OZONA, ST. JOSEPH SOUND 
            FLORIDA
NOAA Chart: 11412                                  Latitude:         28°  4.2' N
USGS Quad:  DUNEDIN                                Longitude:        82° 46.9' W


To reach the tidal bench marks from the Ozona Post Office, proceed north for one
block to Bay Street, then west on Bay Street to its end at Bayshore Drive, then
south on Bayshore Drive for 300 feet (91 m) to the Speckled Trout Fish Camp. 
The bench marks are located in the vicinity of the Speckled Trout Fish Camp and
Bayshore Drive.  The tide gage and staff were located near the west end, and on
the north side of the wooden pier west of the bait shop.


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


                 PRIMARY BENCH MARK STAMPING:  NO 1 1975

MONUMENTATION:           Survey Disk                               VM#:     7616
AGENCY:                                                            PID#:  AL7398
SETTING CLASSIFICATION:  Concrete Foundation


The bench mark is set flush in the concrete foundation of a boat davit located
at the Speckled Trout Fish Camp boat ramp, 47.0 feet (14.3 m) west of the
centerline of Bayshore Drive, 9.0 feet (2.7 m) NE of the centerline of the boat
ramp, and 1.6 feet (0.5 m) NE of the boat ramp edge.



                         BENCH MARK STAMPING:  M 102 1942

MONUMENTATION:           Survey Disk                               VM#:     7615
AGENCY:                                                            PID#:  AL6281
SETTING CLASSIFICATION:  Concrete Monument


The bench mark is set flush in a concrete monument one block north and two
blocks west of the Ozona Post Office, 31.6 feet (9.6 m) south of the centerline
of Bay Street, 8.1 feet (2.5 m) NE of the NE corner of the white frame house at
11 Bay Street, 1.7 feet (0.5 m) SE of power pole #12A2359-R, 1 foot (0.3 m)
north of a witness post, and 0.3 foot (0.1 m) above ground level.

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

                                                   PUBLICATION DATE:  10/11/1988
Station ID: 8726819                                SUPERCEDED DATE:   04/21/2003
Name:       SPECKLED TROUT FISH CAMP, OZONA, ST. JOSEPH SOUND 
            FLORIDA
NOAA Chart: 11412                                  Latitude:         28°  4.2' N
USGS Quad:  DUNEDIN                                Longitude:        82° 46.9' W


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


                         BENCH MARK STAMPING:  NO 2 1975

MONUMENTATION:           Survey Disk                               VM#:     7617
AGENCY:                                                            PID#:  AL7397
SETTING CLASSIFICATION:  Concrete Sidewalk


The bench mark is set flush in the top of the southernmost of two parallel
east/west sea walls located on the north property line of the Speckled Trout
Fish Camp, 180 feet (55 m) SW of the junction of Bay Street and Bayshore Drive,
70 feet (21 m) west of the centerline of Bayshore Drive, and 3 feet (1 m) east
of the junction of the two sea walls.



                         BENCH MARK STAMPING:  NO 4 1975

MONUMENTATION:           Survey Disk                               VM#:     7618
AGENCY:                                                            PID#:  AL7396
SETTING CLASSIFICATION:  Copper-clad Steel Rod


The bench mark is located NW of the bend between Bay Street and Bayshore Drive,
204 feet (62 m) NE of Bench Mark NO 2 1975, 33 feet (10 m) east of a wood
bulkhead, 27 feet (8 m) WSW of a fence and 1-foot (0.3 m) diameter tree, and 2.0
feet (0.6 m) west of power pole #2-25700 with a witness sign.  The bench mark is
crimped to a copper-clad steel rod driven to refusal, encased in a PVC pipe and
concrete, and level with the ground.

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

                                                   PUBLICATION DATE:  10/11/1988
Station ID: 8726819                                SUPERCEDED DATE:   04/21/2003
Name:       SPECKLED TROUT FISH CAMP, OZONA, ST. JOSEPH SOUND 
            FLORIDA
NOAA Chart: 11412                                  Latitude:         28°  4.2' N
USGS Quad:  DUNEDIN                                Longitude:        82° 46.9' W


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


                         BENCH MARK STAMPING:  6819 F 1983

MONUMENTATION:           Survey Disk                               VM#:     7619
AGENCY:                                                            PID#:  AL7399
SETTING CLASSIFICATION:  Concrete Monument


The bench mark is set flush in the top of a concrete monument along Bayshore
Drive, 50 feet (15 m) north of the centerline of the driveway for the house at
300 Bayshore Drive, 47.6 feet (14.5 m) south of the centerline of Banana Road,
14.5 feet (4.4 m) east of the centerline of Bayshore Drive, 3.9 feet (1.2 m)
west of power pole 2A2201F with a witness sign, and level with the ground.

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

                                                   PUBLICATION DATE:  10/11/1988
Station ID: 8726819                                SUPERCEDED DATE:   04/21/2003
Name:       SPECKLED TROUT FISH CAMP, OZONA, ST. JOSEPH SOUND 
            FLORIDA
NOAA Chart: 11412                                  Latitude:         28°  4.2' N
USGS Quad:  DUNEDIN                                Longitude:        82° 46.9' W


                            T I D A L   D A T U M S 


Tidal datums at SPECKLED TROUT FISH CAMP, OZONA, ST. JOSEPH SOUND based on:

     LENGTH OF SERIES:      1 MONTH
     TIME PERIOD:           NOVEMBER 1975
     TIDAL EPOCH:           1960-1978
     CONTROL TIDE STATION:  8726761 DUNEDIN


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

     HIGHEST OBSERVED WATER LEVEL (10/17/1975)         =   4.11
     MEAN HIGHER HIGH WATER                     MHHW   =   3.00
     MEAN HIGH WATER                            MHW    =   2.67
     MEAN TIDE LEVEL                            MTL    =   1.61
     MEAN LOW WATER                             MLW    =   0.55
     MEAN LOWER LOW WATER                       MLLW   =   0.00
     LOWEST  OBSERVED WATER LEVEL (12/03/1975)         =  -0.92

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In FEET above:

     Stamping or Designation                    MLLW        MHW

     NO 1 1975                                   4.72      2.05
     M 102 1942                                  8.79      6.12
     NO 2 1975                                   6.09      3.42
     NO 4 1975                                   9.28      6.61
     6819 F 1983                                 7.37      4.70


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

                                                   PUBLICATION DATE:  10/11/1988
Station ID: 8726819                                SUPERCEDED DATE:   04/21/2003
Name:       SPECKLED TROUT FISH CAMP, OZONA, ST. JOSEPH SOUND 
            FLORIDA
NOAA Chart: 11412                                  Latitude:         28°  4.2' N
USGS Quad:  DUNEDIN                                Longitude:        82° 46.9' W


                             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 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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