Superseded Bench Mark Sheet for 8726988, FILLMANS CREEK, NEW PORT RICHEY FL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:  11/05/1984
Station ID: 8726988                                SUPERCEDED DATE:   04/21/2003
Name:       GULF HARBOR, FILLMANS CREEK                       
            FLORIDA
NOAA Chart: 11409                                  Latitude:         28° 13.8' N
USGS Quad:  TARPON SPRINGS                         Longitude:        82° 45.2' W


To reach the tidal bench marks SW of New Port Richey, proceed 1.6 mile (2.6 km)
from the intersection of US Highway 19 and Floramar Terr S west along Floramar
Terr S to the Gulf Harbor golf course.  The bench marks are between the golf
course and Glenn Drive.  The gage and staff were at the foot of Floramar Terr S,
across Topsail Trail and at the south end and east concrete seawall of the
canal.


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


                 PRIMARY BENCH MARK STAMPING:  6988 A 1976

MONUMENTATION:           Survey Disk                               VM#:     7685
AGENCY:                                                            PID#:  AL7458
SETTING CLASSIFICATION:  Copper-coated Steel Rod


The bench mark is south along Glenn Drive from the intersection of Glenn Drive
and Topsail Trail, 615 feet (187 m) south of Bench Mark 6988 C 1976, 97 feet (30
m) SE of the SE corner of dwelling No 4, 37.2 feet (11.3 m) south of a manhole
cover at the center of Glenn Drive circle, 5.2 feet (1.6 m) NE of a lamp pole
and 1.2 feet (0.4 m) south of the south curb of the road.  The bench mark is
crimped to a 5/8 inch diameter copper-coated steel rod driven to refusal, and
encased in a PVC pipe and concrete.



                         BENCH MARK STAMPING:  6988 B 1976

MONUMENTATION:           Survey Disk                               VM#:     7686
AGENCY:                                                            PID#:  AL7456
SETTING CLASSIFICATION:  Concrete Boat Ramp


The bench mark is SE of the intersection of Floramar Terr S and Topsail Trail,
in the NE corner of a boat ramp, 215 feet (65.5 m) south of Bench Mark 6988 D
1976 and 67.5 feet (20.6 m) NW of the NW corner of dwelling No 133, and is set
flush into the concrete.

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

                                                   PUBLICATION DATE:  11/05/1984
Station ID: 8726988                                SUPERCEDED DATE:   04/21/2003
Name:       GULF HARBOR, FILLMANS CREEK                       
            FLORIDA
NOAA Chart: 11409                                  Latitude:         28° 13.8' N
USGS Quad:  TARPON SPRINGS                         Longitude:        82° 45.2' W


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


                         BENCH MARK STAMPING:  6988 C 1976

MONUMENTATION:           Survey Disk                               VM#:     7687
AGENCY:                                                            PID#:  AL7457
SETTING CLASSIFICATION:  Concrete Storm Drain


The bench mark is south from the intersection of Topsail Trail and Glenn Drive
along Glenn Drive, 48 feet (14.6 m) SSW of a fire hydrant, 43.5 feet (13.3 m) SW
of the SW corner of dwelling No 23 and 13.5 feet (4.1 m) east of the centerline
of Glenn Drive, and is set flush into the top of a concrete base for a storm
drain at road level.



                         BENCH MARK STAMPING:  6988 D 1976

MONUMENTATION:           Survey Disk                               VM#:     7688
AGENCY:                                                            PID#:  AL7455
SETTING CLASSIFICATION:  Concrete Wall


The bench mark is at the Gulf Harbor golf course on the most southern east-west
wall between the parking lot and a grass lawn, 403 feet (122.8 m) NW of a lamp
pole, 227 feet (69.2 m) south of Bench Mark 6988 E 1976, 61 feet (18.6 m) east
of the centerline of Floramar Terr S and 25 feet (7.6 m) north of the north
corner of dwelling No 387, and is set flush into the concrete, 1.0 foot (0.3 m)
above ground.

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

                                                   PUBLICATION DATE:  11/05/1984
Station ID: 8726988                                SUPERCEDED DATE:   04/21/2003
Name:       GULF HARBOR, FILLMANS CREEK                       
            FLORIDA
NOAA Chart: 11409                                  Latitude:         28° 13.8' N
USGS Quad:  TARPON SPRINGS                         Longitude:        82° 45.2' W


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


                         BENCH MARK STAMPING:  6988 E 1976

MONUMENTATION:           Survey Disk                               VM#:     7689
AGENCY:                                                            PID#:  AL7454
SETTING CLASSIFICATION:  Concrete Wall


The bench mark is at the Gulf Harbor golf course on the most northern east-west
wall between the parking lot and a grass lawn, 49 feet (14.9 m) east of the
centerline of Floramar Terr S, 24 feet (7.3 m) SW of the SW corner of dwelling
No 377 and 2.8 feet (0.8 m) SW of a lamp pole, and is set flush into the
concrete, 1.0 foot (0.3 m) above ground.

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

                                                   PUBLICATION DATE:  11/05/1984
Station ID: 8726988                                SUPERCEDED DATE:   04/21/2003
Name:       GULF HARBOR, FILLMANS CREEK                       
            FLORIDA
NOAA Chart: 11409                                  Latitude:         28° 13.8' N
USGS Quad:  TARPON SPRINGS                         Longitude:        82° 45.2' W


                            T I D A L   D A T U M S 


Tidal datums at GULF HARBOR, FILLMANS CREEK based on:

     LENGTH OF SERIES:      1 MONTH
     TIME PERIOD:           MARCH 1976
     TIDAL EPOCH:           1960-1978
     CONTROL TIDE STATION:  8726924 ANCLOTE, ANCLOTE RIVER


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

     HIGHEST OBSERVED WATER LEVEL (03/18/1976)         =   4.20
     MEAN HIGHER HIGH WATER                     MHHW   =   3.40
     MEAN HIGH WATER                            MHW    =   2.97
     MEAN TIDE LEVEL                            MTL    =   1.76
     MEAN LOW WATER                             MLW    =   0.55
     MEAN LOWER LOW WATER                       MLLW   =   0.00
     LOWEST  OBSERVED WATER LEVEL (02/25/1976)         =  -0.96

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In FEET above:

     Stamping or Designation                    MLLW        MHW

     6988 A 1976                                 8.70      5.73
     6988 B 1976                                 6.67      3.70
     6988 C 1976                                 6.07      3.10
     6988 D 1976                                 8.27      5.30
     6988 E 1976                                 8.22      5.25


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

                                                   PUBLICATION DATE:  11/05/1984
Station ID: 8726988                                SUPERCEDED DATE:   04/21/2003
Name:       GULF HARBOR, FILLMANS CREEK                       
            FLORIDA
NOAA Chart: 11409                                  Latitude:         28° 13.8' N
USGS Quad:  TARPON SPRINGS                         Longitude:        82° 45.2' 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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