Bench Mark Sheet for 8726607, Old Port Tampa 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Superseded Epoch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Small blue map location marker Unpublished bench mark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  6

                                                                                
Station ID: 8726607                         PUBLICATION DATE:  08/17/2010
Name:       PORT TAMPA, OLD TAMPA BAY                         
            FL
NOAA Chart: 11413                           Latitude:   27° 51.5' N (  27.85778)
USGS Quad:  PORT TAMPA                      Longitude:  82° 33.2' W ( -82.55269)


To reach the tidal bench marks from the junction of U. S. Highway 92 East (North
Dale Mabry Highway) and South West Shore Boulevard, proceed 5 km (3 mi) south on
South West Shore Boulevard which turns into Commerce Street, then 0.3 km (0.2
km) West on a road marked only with a Gold Bond Building Products plant sign to
the entrance of the plant.  The tidal bench marks are located in the vicinity of
 Gold Bond Building Products Plant. The tide gauge is located on the Picnic
Island Fishing Pier next to the parking lot of the plant.


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


                 PRIMARY BENCH MARK STAMPING:  6607 A 1991
                         DESIGNATION:          872 6607 A

MONUMENTATION:           Tidal Station disk                    VM#:        14019
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Concrete bulkhead                     OPUS PID#: DQ1034
LATITUDE:   27° 51.5' N (  27.85797)          LONGITUDE:  82° 33.1' W ( -82.55206)


The primary bench mark is a disk set in the NW corner of the conrete bulkhead on
the north side of the boat ramp, 36.30 m (119.09 ft) west of the east end of the
bulkhead, 9.1 m (29.9 ft) SW of the center one of five palm trees, and 5.91 m
(19.39 ft) SSW of the north end of the bulkhead.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  2 of  6

                                                                                
Station ID: 8726607                         PUBLICATION DATE:  08/17/2010
Name:       PORT TAMPA, OLD TAMPA BAY                         
            FL
NOAA Chart: 11413                           Latitude:   27° 51.5' N (  27.85778)
USGS Quad:  PORT TAMPA                      Longitude:  82° 33.2' W ( -82.55269)


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


                         BENCH MARK STAMPING:  6607 B 1991
                         DESIGNATION:          872 6607 B

MONUMENTATION:           Tidal Station disk                    VM#:        14020
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Concrete retaining wall               OPUS PID:        
LATITUDE:   27° 51.6' N (  27.85917)          LONGITUDE:  82° 33.0' W ( -82.55044)


The bench mark is a disk set near the west end of a low concrete retaining wall
on the west side of the mill building at the Gold Bond Building Products plant,
19.60 m (64.30 ft) ENE of the NE corner of a four-story conveyor building, 16.70
m (54.79 ft) WNW of the SW corner of the mill building with four loading doors
on its west side, 1.31 m (4.30 ft) east of the west end of the retaining wall,
and 0.3 m (0.98 ft) above the pavement.



                         BENCH MARK STAMPING:  6607 C 1991
                         DESIGNATION:          872 6607 C

MONUMENTATION:           Tidal Station disk                    VM#:        14021
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Base of bollard                       OPUS PID#: BBDM30
LATITUDE:   27° 51.7' N (  27.86089)          LONGITUDE:  82° 33.1' W ( -82.55089)


The bench mark is a disk set in the SW corner of a concrete base of a bollard
along the south side of the Port Tampa ship basin, 47.70 m (156.50 ft) NW of
power pole No. 22230, 16.31 m (53.51 ft) east of the centerline of the entrance
ramp for the Chevron USA loading dock, and 9.11 m (29.89 ft) north of the
centerline of the access road.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  3 of  6

                                                                                
Station ID: 8726607                         PUBLICATION DATE:  08/17/2010
Name:       PORT TAMPA, OLD TAMPA BAY                         
            FL
NOAA Chart: 11413                           Latitude:   27° 51.5' N (  27.85778)
USGS Quad:  PORT TAMPA                      Longitude:  82° 33.2' W ( -82.55269)


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


                         BENCH MARK STAMPING:  6607 D 1991
                         DESIGNATION:          872 6607 D

MONUMENTATION:           Tidal Station disk                    VM#:        14022
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Base of bollard                       OPUS PID#: BBDM29
LATITUDE:   27° 51.7' N (  27.86089)          LONGITUDE:  82° 33.0' W ( -82.54994)


The bench mark is a disk set in the SE corner of the concrete base of a bollard
along the south side of the Port Tampa ship basin, 39.99 m (131.20 ft) NW of
power pole NO. 22254, 9.11 m (29.89 ft) north of the centerline of the access
road, and 1.58 m (5.18 ft) SE of the center of the bollard.



                         BENCH MARK STAMPING:  6607 E 1991
                         DESIGNATION:          872 6607 E

MONUMENTATION:           Tidal Station disk                    VM#:        14023
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Entrance platform                     OPUS PID:        
LATITUDE:   27° 51.6' N (  27.86056)          LONGITUDE:  82° 33.0' W ( -82.54947)


The bench mark is a disk set in the NW corner of the main entrance to the Gold
Bond Building Products office building near the main gate of the plant, 14.20 m
(46.59 ft) east of the NW corner of the building, 14.20 m (46.59 ft) west of the
NE corner of the building, 9.30 m (30.51 ft) south of the south curb of the
entrance drive, and 0.46 m (1.51 ft) above ground level.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  4 of  6

                                                                                
Station ID: 8726607                         PUBLICATION DATE:  08/17/2010
Name:       PORT TAMPA, OLD TAMPA BAY                         
            FL
NOAA Chart: 11413                           Latitude:   27° 51.5' N (  27.85778)
USGS Quad:  PORT TAMPA                      Longitude:  82° 33.2' W ( -82.55269)


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


                         BENCH MARK STAMPING:   
                         DESIGNATION:          TH 149

MONUMENTATION:           See descriptive text                  VM#:        19613
AGENCY:                                                        IDB PID#:        
SETTING CLASSIFICATION:                                        OPUS PID:        
LATITUDE:   27° 51.5' N (  27.85789)          LONGITUDE:  82° 33.1' W ( -82.55172)


Bench mark is a disk set flush with the ground, 38.55 m (126.5 ft) east of a
light pole marked 1-22177-38135-A, 36.27 m (119.0 ft) NW of the westernmost
corner of the sea wall on the northern side of the boat ramp, 7.68 m (25.2 ft)
NNE of the centerline of the boat ramp, being the high point of a US Corps of
Engineers brass bench mark disk, stamped  'TH-149  JAX FL  2002'. 

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  5 of  6

                                                                                
Station ID: 8726607                         PUBLICATION DATE:  08/17/2010
Name:       PORT TAMPA, OLD TAMPA BAY                         
            FL
NOAA Chart: 11413                           Latitude:   27° 51.5' N (  27.85778)
USGS Quad:  PORT TAMPA                      Longitude:  82° 33.2' W ( -82.55269)


                            T I D A L   D A T U M S 


Tidal datums at PORT TAMPA, OLD TAMPA BAY based on:

     LENGTH OF SERIES:      72 MONTHS
     TIME PERIOD:           Jan99-Dec00,Jan03-Dec03,Dec05-Nov08
     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:

     HIGHEST OBSERVED WATER LEVEL (10/08/1996)         =  1.845
     MEAN HIGHER HIGH WATER                     MHHW   =  0.749
     MEAN HIGH WATER                            MHW    =  0.652
     MEAN TIDE LEVEL                            MTL    =  0.394
     MEAN SEA LEVEL                             MSL    =  0.391
     MEAN LOW WATER                             MLW    =  0.136
     MEAN LOWER LOW WATER                       MLLW   =  0.000
     LOWEST  OBSERVED WATER LEVEL (12/15/2004)         = -0.696

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     6607 A 1991                                 1.379    0.727
     6607 B 1991                                 2.965    2.313
     6607 C 1991                                 1.707    1.055
     6607 D 1991                                 1.861    1.209
     6607 E 1991                                 2.971    2.319
     TH 149                                      1.366    0.714


Foot Notes:

Bench mark TH 149 is based on one differential leveling connection and does not
meet the quality control standards of the NOS.  Therefore, caution should be
used when deriving elevations for this mark.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  6 of  6

                                                                                
Station ID: 8726607                         PUBLICATION DATE:  08/17/2010
Name:       PORT TAMPA, OLD TAMPA BAY                         
            FL
NOAA Chart: 11413                           Latitude:   27° 51.5' N (  27.85778)
USGS Quad:  PORT TAMPA                      Longitude:  82° 33.2' W ( -82.55269)


                             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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