Bench Mark Sheet for 8726904, HOWARD PARK 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Superseded Epoch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Small blue map location marker Unpublished bench mark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: 8726904                         PUBLICATION DATE:  01/06/2004
Name:       HOWARD PARK                                       
            FL
NOAA Chart: 11412                           Latitude:   28°  9.2' N (  28.15330)
USGS Quad:  TARPON SPRINGS                  Longitude:  82° 48.1' W ( -82.80170)


To reach the tidal bench marks from the intersection of U.S. Highway ALT 19
(Pinellas Avenue) and State Road 582 (Tarpon Avenue) in Tarpon Springs, proceed
west on Tarpon Avenue for 0.24 km (0.15 mi) to Spring Boulevard, then north and
west on Spring Boulevard, becomes Riverside Drive, for 2.7 km (1.7 mi) to Sunset
Drive, then turn left and proceed west on Sunset Drive for 0.8 km (0.5 mi) to
the entrance to Fred Howard Park, then turn into the park  and head west on
Howard Park Causeway for 1.6 km (1.0 mi) to the westmost causeway bridge.  The
bench marks are along Howard Park Causeway, the bridge, and the sea wall.  The
tide gage and staff were at the west causeway bridge leading to the swimming
beach.


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


                 PRIMARY BENCH MARK STAMPING:  NO 1 1975
                         DESIGNATION:          872 6904 TIDAL 1

MONUMENTATION:           Tidal Station disk                    VM#:         7642
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  AL7386
SETTING CLASSIFICATION:  Concrete bulkhead                     OPUS PID:        
LATITUDE:   28°  9.2' N (  28.15330)          LONGITUDE:  82° 48.1' W ( -82.80170)


The primary bench mark is a disk set in top of the concrete bulkhead of the
westernmost bridge leading to the swimming beach at Fred Howard Park, 6.10 m
(20.0 ft) SE of bench mark NO 2 1975, 4.36 m (14.3 ft) NE of the SW end of the
bulkhead, 5.94 m (19.5 ft) SSW of the SW corner of the bridge, and 1 m (3 ft)
below the level of the road.

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

                                                                                
Station ID: 8726904                         PUBLICATION DATE:  01/06/2004
Name:       HOWARD PARK                                       
            FL
NOAA Chart: 11412                           Latitude:   28°  9.2' N (  28.15330)
USGS Quad:  TARPON SPRINGS                  Longitude:  82° 48.1' W ( -82.80170)


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


                         BENCH MARK STAMPING:  NO 2 1975
                         DESIGNATION:          872 6904 TIDAL 2

MONUMENTATION:           Tidal Station disk                    VM#:         7643
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  AL7385
SETTING CLASSIFICATION:  Concrete walkway                      OPUS PID:        
LATITUDE:   28°  9.2' N (  28.15330)          LONGITUDE:  82° 48.1' W ( -82.80170)


The bench mark is a disk set flush into the SW corner of the concrete walkway of
the westernmost bridge leading to Sand Point and the swimming beach at Fred
Howard Park, 6 m (20 ft) NW of Bench Mark NO 1 1975, 5.18 m (17.0 ft) south of
the centerline of the road. 0.30 m (1.0 ft) east of the west end of the bridge,
and 0.30 m (1.0 ft) north of the concrete guard rail.



                         BENCH MARK STAMPING:  NO 3 1975
                         DESIGNATION:          872 6904 TIDAL 3

MONUMENTATION:           Tidal Station disk                    VM#:         7644
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  AL7384
SETTING CLASSIFICATION:  Concrete walkway                      OPUS PID:        
LATITUDE:   28°  9.2' N (  28.15330)          LONGITUDE:  82° 48.0' W ( -82.80000)


The bench mark is a disk set flush into the NW corner of the concrete walkway of
the westernmost bridge leading to Sand Point and the swimming beach at Fred
Howard Park, 5 m (17 ft) north of the centerline of the bridge, 0.30 m (1.0 ft)
east of the west end of the bridge and 0.30 m (1.0 ft) south of the concrete
guard rail.

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

                                                                                
Station ID: 8726904                         PUBLICATION DATE:  01/06/2004
Name:       HOWARD PARK                                       
            FL
NOAA Chart: 11412                           Latitude:   28°  9.2' N (  28.15330)
USGS Quad:  TARPON SPRINGS                  Longitude:  82° 48.1' W ( -82.80170)


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


                         BENCH MARK STAMPING:  NO 4 1975
                         DESIGNATION:          872 6904 TIDAL 4

MONUMENTATION:           Tidal Station disk                    VM#:         7645
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  AL7383
SETTING CLASSIFICATION:  Concrete bulkhead                     OPUS PID:        
LATITUDE:   28°  9.2' N (  28.15330)          LONGITUDE:  82° 48.0' W ( -82.80000)


The bench mark is a disk set in top of the eastern concrete bulkhead at the
westernmost bridge leading to Sand Point and the swimming beach at Fred Howard
Park, 39 m (127 ft) WSW of Bench Mark NO 5 1975, 14.48 m (47.5 ft) north of the
centerline of the road, and 0.46 m (1.5 ft) SW of the NE end of the bulkhead.

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

                                                                                
Station ID: 8726904                         PUBLICATION DATE:  01/06/2004
Name:       HOWARD PARK                                       
            FL
NOAA Chart: 11412                           Latitude:   28°  9.2' N (  28.15330)
USGS Quad:  TARPON SPRINGS                  Longitude:  82° 48.1' W ( -82.80170)


                            T I D A L   D A T U M S 


Tidal datums at HOWARD PARK based on:

     LENGTH OF SERIES:      1 MONTH
     TIME PERIOD:           November 1975 - November 1975
     TIDAL EPOCH:           1983-2001
     CONTROL TIDE STATION:  8726924 ANCLOTE RIVER


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

     MEAN HIGHER HIGH WATER                     MHHW   =  0.924
     MEAN HIGH WATER                            MHW    =  0.813
     North American Vertical Datum              NAVD88 =  0.570
     MEAN SEA LEVEL                             MSL    =  0.493
     MEAN TIDE LEVEL                            MTL    =  0.490
     MEAN LOW WATER                             MLW    =  0.167
     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 1 1975                                   1.566    0.753
     NO 2 1975                                   3.343    2.530
     NO 3 1975                                   3.109    2.296
     NO 4 1975                                   1.275    0.462


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

                                                                                
Station ID: 8726904                         PUBLICATION DATE:  01/06/2004
Name:       HOWARD PARK                                       
            FL
NOAA Chart: 11412                           Latitude:   28°  9.2' N (  28.15330)
USGS Quad:  TARPON SPRINGS                  Longitude:  82° 48.1' W ( -82.80170)


                             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 8726904 HOWARD PARK, FL