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Bench Mark Sheet for 8726651, PENDOLA POINT, HILLSBOROUGH BAY 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Superseded Epoch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Small blue map location marker Unpublished bench mark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: 8726651                         PUBLICATION DATE:  04/21/2003
Name:       PENDOLA POINT, HILLSBOROUGH BAY                   
            FL
NOAA Chart: 11413                           Latitude:   27° 54.0' N (  27.90000)
USGS Quad:  TAMPA                           Longitude:  82° 25.4' W ( -82.42330)


To reach the tidal bench marks from the intersection of U. S. Highway 41 and
Pendola Point Road, proceed west on Pendola Point Road for 2.3 km (1.4 mi).  The
bench marks are along the shoreline.  The tide gage and staff were on a platform
approximately 107 m (350 ft) south of the shoreline.


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


                 PRIMARY BENCH MARK STAMPING:  6651 A 1977
                         DESIGNATION:          872 6651 A TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         7488
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  AG9401
SETTING CLASSIFICATION:  Concrete monument                     OPUS PID:        
LATITUDE:   27° 54.0' N (  27.90000)          LONGITUDE:  82° 25.6' W ( -82.42670)


The primary bench mark is a disk set in the top of a concrete monument, 18.11 m
(59.4 ft) south of the centerline of Pendola Point Road, 10.00 m (32.8 ft) south
of power pole #40, and 0.24 m (0.8 ft) north of a witness post.



                         BENCH MARK STAMPING:  6651 B 1977
                         DESIGNATION:          872 6651 B TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         7489
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  AG9402
SETTING CLASSIFICATION:  Concrete monument                     OPUS PID:        
LATITUDE:   27° 54.0' N (  27.90000)          LONGITUDE:  82° 25.6' W ( -82.42670)


The bench mark is a disk set in the top of a concrete monument, 37.00 m (121.4
ft) west of bench mark 6651 A 1977, 18.50 m (60.7 ft) south of the centerline of
Pendola Point Road, and 0.21 m (0.7 ft) north of a witness post.

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

                                                                                
Station ID: 8726651                         PUBLICATION DATE:  04/21/2003
Name:       PENDOLA POINT, HILLSBOROUGH BAY                   
            FL
NOAA Chart: 11413                           Latitude:   27° 54.0' N (  27.90000)
USGS Quad:  TAMPA                           Longitude:  82° 25.4' W ( -82.42330)


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


                         BENCH MARK STAMPING:  6651 C 1977
                         DESIGNATION:          872 6651 C TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         7490
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  AG9403
SETTING CLASSIFICATION:  Concrete monument                     OPUS PID:        
LATITUDE:   27° 54.0' N (  27.90000)          LONGITUDE:  82° 25.6' W ( -82.42670)


The bench mark is a disk set in the top of a concrete monument, 32 m (105 ft)
west of bench mark 6651 B 1977, 19 m (62 ft) south of the centerline of Pendola
Point Road, 14.69 m (48.2 ft) SE of power pole #41, and 0.21 m (0.7 ft) north of
a witness post.



                         BENCH MARK STAMPING:  6651 E 1977
                         DESIGNATION:          872 6651 E TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         7491
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  AG9404
SETTING CLASSIFICATION:  Concrete monument                     OPUS PID:        
LATITUDE:   27° 54.0' N (  27.90000)          LONGITUDE:  82° 25.7' W ( -82.42830)


The bench mark is a disk set in the top of a concrete monument, 55 m (182 ft) SE
of power pole #42, 29.99 m (98.4 ft) west of bench mark 6651 C 1977, 24.51 m
(80.4 ft)  SW of power pole #41, 19 m (61 ft) south of the centerline of Pendola
Point Road, and 0.21 m (0.7 ft) north of a witness post.

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

                                                                                
Station ID: 8726651                         PUBLICATION DATE:  04/21/2003
Name:       PENDOLA POINT, HILLSBOROUGH BAY                   
            FL
NOAA Chart: 11413                           Latitude:   27° 54.0' N (  27.90000)
USGS Quad:  TAMPA                           Longitude:  82° 25.4' W ( -82.42330)


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


                         BENCH MARK STAMPING:  6651 G 1990
                         DESIGNATION:          872 6651 G TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:        12515
AGENCY:                  Florida Department of Natural Resources
                         (FLDNR)                               IDB PID#:  AG9405
SETTING CLASSIFICATION:  Stainless steel rod                   OPUS PID:        
LATITUDE:   27° 54.1' N (  27.90170)          LONGITUDE:  82° 25.7' W ( -82.42830)


The bench mark is a disk located 93.51 m (306.8 ft) west of bench mark 6651 E
1977, 37.89 m (124.3 ft) west of power pole #42, 37 m (122 ft) east of power
pole #43, 7 m (22 ft) south of the centerline of Pendola Point Road, and 0.30 m
(1.0 ft) north of a witness post.  The bench mark is a disk crimped to the top
of a stainless steel rod driven to an unspecified depth.

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

                                                                                
Station ID: 8726651                         PUBLICATION DATE:  04/21/2003
Name:       PENDOLA POINT, HILLSBOROUGH BAY                   
            FL
NOAA Chart: 11413                           Latitude:   27° 54.0' N (  27.90000)
USGS Quad:  TAMPA                           Longitude:  82° 25.4' W ( -82.42330)


                            T I D A L   D A T U M S 


Tidal datums at PENDOLA POINT, HILLSBOROUGH BAY based on:

     LENGTH OF SERIES:      1 Month
     TIME PERIOD:           August 1990 - August 1990
     TIDAL EPOCH:           1983-2001
     CONTROL TIDE STATION:  8726520 ST. PETERSBURG, TAMPA BAY


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

     MEAN HIGHER HIGH WATER                     MHHW   =  0.794
     MEAN HIGH WATER                            MHW    =  0.689
     North American Vertical Datum              NAVD88 =  0.506
     MEAN SEA LEVEL                             MSL    =  0.425
     MEAN TIDE LEVEL                            MTL    =  0.413
     MEAN LOW WATER                             MLW    =  0.137
     MEAN LOWER LOW WATER                       MLLW   =  0.000

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     6651 A 1977                                 1.029    0.340
     6651 B 1977                                 0.955    0.266
     6651 C 1977                                 0.909    0.220
     6651 E 1977                                 0.934    0.245
     6651 G 1990                                 3.280    2.591


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

                                                                                
Station ID: 8726651                         PUBLICATION DATE:  04/21/2003
Name:       PENDOLA POINT, HILLSBOROUGH BAY                   
            FL
NOAA Chart: 11413                           Latitude:   27° 54.0' N (  27.90000)
USGS Quad:  TAMPA                           Longitude:  82° 25.4' W ( -82.42330)


                             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 8726651 PENDOLA POINT, HILLSBOROUGH BAY, FL

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