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Bench Mark Sheet for 8726833, SUTHERLAND BAYOU, PALM HARBOR 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Superseded Epoch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Small blue map location marker Unpublished bench mark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: 8726833                         PUBLICATION DATE:  04/01/2004
Name:       SUTHERLAND BAYOU, PALM HARBOR                     
            FL
NOAA Chart: 11412                           Latitude:   28°  5.1' N (  28.08500)
USGS Quad:  DUNEDIN                         Longitude:  82° 46.3' W ( -82.77170)


To reach the tidal bench marks from the intersection of U.S. Alt. Route 19 (10th
Street) and Delaware Avenue in Palm Harbor, proceed north on U.S. Alt. Route 19
for about 0.8 km (0.5 mi) to a drive leading to Palm Harbor Fishing Lodge, then
turn left onto the drive and continue past the railroad tracks to the
waterfront.  The bench marks are located along U.S. Alt. Route 19 between
Delaware Avenue and the drive.  The tide gage and staff were located on a dock
at the Palm Harbor Fishing Lodge.


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


                 PRIMARY BENCH MARK STAMPING:  6833 A
                         DESIGNATION:          872 6833 A TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         7622
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  AL7394
SETTING CLASSIFICATION:  Copper-clad steel rod                 OPUS PID:        
LATITUDE:   28°  5.2' N (  28.08670)          LONGITUDE:  82° 46.2' W ( -82.77000)


The primary bench mark is a disk located 0.5 km (0.3 mi) NW of bench mark 6833 C
1976, 10.52 m (34.5 ft) SW of the centerline of U.S. Alt. Route 19, 8.99 m (29.5
ft) NE of the centerline of the railroad tracks, and 2.53 m (8.3 ft) SE of
utility pole #12A-5811R with a witness sign.  The bench mark is 9 cm (0.3 ft)
below the ground, crimped to the top of a copper-clad steel rod driven an
unspecified depth to refusal, and encased in a PVC pipe and concrete kickblock.

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

                                                                                
Station ID: 8726833                         PUBLICATION DATE:  04/01/2004
Name:       SUTHERLAND BAYOU, PALM HARBOR                     
            FL
NOAA Chart: 11412                           Latitude:   28°  5.1' N (  28.08500)
USGS Quad:  DUNEDIN                         Longitude:  82° 46.3' W ( -82.77170)


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


                         BENCH MARK STAMPING:  6833 B 1976
                         DESIGNATION:          872 6833 B

MONUMENTATION:           Tidal Station disk                    VM#:         7620
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:        
SETTING CLASSIFICATION:  Copper-clad steel rod                 OPUS PID:        
LATITUDE:   28°  5.1' N (  28.08500)          LONGITUDE:  82° 46.2' W ( -82.77000)


The bench mark is a disk located 0.2 km (0.1 mi) NNW of bench mark 6833 C 1976,
10.58 m (34.7 ft) NE of the centerline of the railroad tracks, 8.63 m (28.3 ft)
SW of the centerline of U.S. Highway Alt. 19, and 0.43 m (1.4 ft) SE of utility
pole #13A-5805R with witness sign.  The bench mark is 15 m (0.5 ft) below ground
level, crimped to a copper-clad steel rod driven an unspecified depth to
refusal, and encased in a PVC pipe and concrete kickblock.



                         BENCH MARK STAMPING:  6833 C 1976
                         DESIGNATION:          872 6833 C TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         7621
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  AL7393
SETTING CLASSIFICATION:  Copper-clad steel rod                 OPUS PID:        
LATITUDE:   28°  5.1' N (  28.08500)          LONGITUDE:  82° 46.1' W ( -82.76830)


The bench mark is a disk located at the intersection of U.S. Alt. Route 19 and
Missouri Avenue, 0.08 km (0.05 mi) NW of Bench Mark OZONA G, 11 m (35 ft) west
of the centerline of U.S. Highway Alt. 19, 7.83 m (25.7 ft) east of the
centerline of the railroad tracks, and 6 m (21 ft) south of the centerline of
Missouri Avenue.  The bench mark is 6 cm (0.2 ft) below the ground level,
crimped to a copper-clad steel rod driven to an unspecified depth to refusal,
and encased in  a PVC pipe and concrete kickblock. 

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

                                                                                
Station ID: 8726833                         PUBLICATION DATE:  04/01/2004
Name:       SUTHERLAND BAYOU, PALM HARBOR                     
            FL
NOAA Chart: 11412                           Latitude:   28°  5.1' N (  28.08500)
USGS Quad:  DUNEDIN                         Longitude:  82° 46.3' W ( -82.77170)


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


                         BENCH MARK STAMPING:  OZONA G
                         DESIGNATION:          OZONA G

MONUMENTATION:           Bench Mark disk                       VM#:         7624
AGENCY:                  Pinellas County                       IDB PID#:  AL0281
SETTING CLASSIFICATION:  Concrete monument                     OPUS PID:        
LATITUDE:   28°  5.0' N (  28.08330)          LONGITUDE:  82° 46.0' W ( -82.76670)


The bench mark is a disk set in the top of a concrete monument located at the
intersection of Delaware Avenue and U.S. Alt. Route 19, 14.84 m (48.7 ft) south
of the centerline of Delaware Avenue, 13 m (42 ft) NW of a 1 m (2 ft) diameter
pine tree, 8.08 m (26.5 ft) east of the centerline of U.S. Highway Alt. 19, 0.61
m (2.0 ft) NW of a 0.37 m (1.2 ft) diameter palm tree.

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

                                                                                
Station ID: 8726833                         PUBLICATION DATE:  04/01/2004
Name:       SUTHERLAND BAYOU, PALM HARBOR                     
            FL
NOAA Chart: 11412                           Latitude:   28°  5.1' N (  28.08500)
USGS Quad:  DUNEDIN                         Longitude:  82° 46.3' W ( -82.77170)


                            T I D A L   D A T U M S 


Tidal datums at SUTHERLAND BAYOU, PALM HARBOR based on:

     LENGTH OF SERIES:      1 MONTH
     TIME PERIOD:           March 1976 - March 1976
     TIDAL EPOCH:           1983-2001
     CONTROL TIDE STATION:  8726724 CLEARWATER BEACH, GULF OF MEXICO


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

     MEAN HIGHER HIGH WATER                     MHHW   =  0.928
     MEAN HIGH WATER                            MHW    =  0.814
     North American Vertical Datum              NAVD88 =  0.593
     MEAN SEA LEVEL                             MSL    =  0.493
     MEAN TIDE LEVEL                            MTL    =  0.490
     MEAN LOW WATER                             MLW    =  0.166
     MEAN LOWER LOW WATER                       MLLW   =  0.000

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     6833 A                                      1.333    0.519
     6833 B 1976                                 2.815    2.001
     6833 C 1976                                 3.983    3.169
     OZONA G                                     5.576    4.762


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

                                                                                
Station ID: 8726833                         PUBLICATION DATE:  04/01/2004
Name:       SUTHERLAND BAYOU, PALM HARBOR                     
            FL
NOAA Chart: 11412                           Latitude:   28°  5.1' N (  28.08500)
USGS Quad:  DUNEDIN                         Longitude:  82° 46.3' W ( -82.77170)


                             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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Products available at 8726833 SUTHERLAND BAYOU, PALM HARBOR, FL

Revised: 08/08/2018
NOAA / National Ocean Service
Web site owner: Center for Operational Oceanographic Products and Services