U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 5
PUBLICATION DATE: 05/23/2000
Station ID: 8726607 SUPERCEDED DATE: 04/21/2003
Name: PORT TAMPA, OLD TAMPA BAY
FLORIDA
NOAA Chart: 11413 Latitude: 27° 51.4' N
USGS Quad: PORT TAMPA Longitude: 82° 33.2' W
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) PID:
SETTING CLASSIFICATION: Concrete bulkhead
The primary bench mark is a disk set in the NW corner of the conrete bulkhead on
the north side of the boat ramp at the Picnic Island fishing pier, 36.30 m
(119.1 ft) west of the east end of the bulkhead, 2.77 m (9.1 ft) SW of the
center one of five palm trees, and 5.91 m (19.4 ft) SSW of the north end of the
bulkhead.
BENCH MARK STAMPING: 6607 B 1991
DESIGNATION: 872 6607 B
MONUMENTATION: Tidal Station disk VM#: 14020
AGENCY: National Ocean Service (NOS) PID:
SETTING CLASSIFICATION: Concrete retaining wall
The bench mark is a disk set flush 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 (64.3 ft) ENE of the NE corner of a four-story conveyor building,
16.70 m (54.8 ft) WNW of the SW corner of the mill building with four loading
doors on its west side, 1.31 m (4.3 ft) east of the west end of the retaining
wall, and 0.3 m (1 ft) above the pavement.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 5
PUBLICATION DATE: 05/23/2000
Station ID: 8726607 SUPERCEDED DATE: 04/21/2003
Name: PORT TAMPA, OLD TAMPA BAY
FLORIDA
NOAA Chart: 11413 Latitude: 27° 51.4' N
USGS Quad: PORT TAMPA Longitude: 82° 33.2' W
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 6607 C 1991
DESIGNATION: 872 6607 C
MONUMENTATION: Tidal Station disk VM#: 14021
AGENCY: National Ocean Service (NOS) PID:
SETTING CLASSIFICATION: Concrete base
The bench mark is a disk set flush in the SW corner of a concrete base of a
bollard along the south side of the Port Tampa ship basin, 47.70 m (156.5 ft) NW
of power pole No. 22230, 16.31 m (53.5 ft) east of the centerline of the
entrance ramp for the Chevron USA loading dock, and 9.11 m (29.9 ft) north of
the centerline of the access road.
BENCH MARK STAMPING: 6607 D 1991
DESIGNATION: 872 6607 D
MONUMENTATION: Tidal Station disk VM#: 14022
AGENCY: National Ocean Service (NOS) PID:
SETTING CLASSIFICATION: Concrete base
The bench mark is a disk set flush in the SE corner of the concrete base of a
bollard along the south side of the Port Tampa ship basin, 39.99 m (131.2 ft) NW
of power pole NO. 22254, 9.11 m (29.9 ft) north of the centerline of the access
road, and 1.58 m (5.2 ft) SE of the center of the bollard.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 5
PUBLICATION DATE: 05/23/2000
Station ID: 8726607 SUPERCEDED DATE: 04/21/2003
Name: PORT TAMPA, OLD TAMPA BAY
FLORIDA
NOAA Chart: 11413 Latitude: 27° 51.4' N
USGS Quad: PORT TAMPA Longitude: 82° 33.2' W
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 6607 E 1991
DESIGNATION: 872 6607 E
MONUMENTATION: Tidal Station disk VM#: 14023
AGENCY: National Ocean Service (NOS) PID:
SETTING CLASSIFICATION: Concrete platform
The bench mark is a disk set flush 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 (46.6 ft) east of the NW corner of the building, 14.20 m (46.6 ft) west
of the NE corner of the building, 9.30 m (30.5 ft) south of the south curb of
the entrance drive, and 0.46 m (1.5 ft) above ground level.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 5
PUBLICATION DATE: 05/23/2000
Station ID: 8726607 SUPERCEDED DATE: 04/21/2003
Name: PORT TAMPA, OLD TAMPA BAY
FLORIDA
NOAA Chart: 11413 Latitude: 27° 51.4' N
USGS Quad: PORT TAMPA Longitude: 82° 33.2' W
T I D A L D A T U M S
Tidal datums at PORT TAMPA, OLD TAMPA BAY based on:
LENGTH OF SERIES: 1 YEAR
TIME PERIOD: January 1999 - December 1999
TIDAL EPOCH: 1960-1978
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) = 1.902
MEAN HIGHER HIGH WATER MHHW = 0.753
MEAN HIGH WATER MHW = 0.658
MEAN TIDE LEVEL MTL = 0.395
MEAN SEA LEVEL MSL = 0.393
MEAN LOW WATER MLW = 0.132
MEAN LOWER LOW WATER MLLW = 0.000
LOWEST OBSERVED WATER LEVEL (03/19/1996) = -0.512
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
6607 A 1991 1.436 0.778
6607 B 1991 3.023 2.365
6607 C 1991 1.763 1.105
6607 D 1991 1.917 1.259
6607 E 1991 3.027 2.369
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 5
PUBLICATION DATE: 05/23/2000
Station ID: 8726607 SUPERCEDED DATE: 04/21/2003
Name: PORT TAMPA, OLD TAMPA BAY
FLORIDA
NOAA Chart: 11413 Latitude: 27° 51.4' N
USGS Quad: PORT TAMPA Longitude: 82° 33.2' 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.