U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 4
PUBLICATION DATE: 11/21/1987
Station ID: 8726282 SUPERCEDED DATE: 04/21/2003
Name: ANNA MARIA CITY PIER, TAMPA BAY
FLORIDA
NOAA Chart: 11414 Latitude: 27° 32.0' N
USGS Quad: ANNA MARIA Longitude: 82° 43.8' W
To reach the tidal bench marks from the Post Office in Anna Maria proceed NW
along Gulf Drive (C 789) for 0.3 mile (0.5 km) to Pine Avenue, then NE along
Pine Avenue for 0.5 mile (0.8 km) to Anna Maria City Fishing Pier. The bench
marks are located along Pine Avenue. The tide gage and staff were located on
the NE inside corner of the pier.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 6282 A 1976
MONUMENTATION: Survey Disk VM#: 6196
AGENCY: PID#: AG7391
SETTING CLASSIFICATION: Concrete Catch Basin
The bench mark is set in the SE corner of a concrete drain ditch, 152 feet (46
m) SW of the centerline of Bay Boulevard, 33.5 feet (10.2 m) NE of a 35 mph
speed limit sign post, 20.3 feet (6.2 m) NW of the centerline of Pine Avenue,
and 6 feet (2 m) south of the corner of a chain link fence.
BENCH MARK STAMPING: NO 5 1933
MONUMENTATION: Survey Disk VM#: 6193
AGENCY: PID#: AG5206
SETTING CLASSIFICATION: Concrete Monument
The bench mark is set in the top of a square concrete monument at the
intersection of Bay Boulevard and Spring Street, SE of the Fishing Pier, 69.5
feet (21.2 m) south of pole 6-C-6, 46 feet (14 m) SE of the centerline of Spring
Street, 22 feet (7 m) SW of the centerline of Bay Boulevard and 0.5 foot (0.2 m)
NE of the NE edge of the sidewalk on the SW side of Bay Boulevard.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 4
PUBLICATION DATE: 11/21/1987
Station ID: 8726282 SUPERCEDED DATE: 04/21/2003
Name: ANNA MARIA CITY PIER, TAMPA BAY
FLORIDA
NOAA Chart: 11414 Latitude: 27° 32.0' N
USGS Quad: ANNA MARIA Longitude: 82° 43.8' W
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: R 254 1965
MONUMENTATION: Survey Disk VM#: 6194
AGENCY: PID#: AG5207
SETTING CLASSIFICATION: Concrete Walkway
The bench mark is set in the top of the end of the east concrete walkway of a
concrete bridge over a canal, 225 feet (69 m) north of Anna Maria City Building,
11.5 feet (3.5 m) east of the centerline of the drive, and 1 foot (0.3 m) above
the level of the road.
BENCH MARK STAMPING: S 254 1965
MONUMENTATION: Survey Disk VM#: 6195
AGENCY: PID#: AG5205
SETTING CLASSIFICATION: Concrete Walkway
The bench mark is set in the top of the SE end of the SW concrete walkway of a
concrete bridge over a canal, 300 feet (91 m) NW of the SW end of Anna Maria
City Fishing Pier, 11 feet (3 m) SW of the centerline of Bay Boulevard, and
level with the road.
BENCH MARK STAMPING: 6282 B 1976
MONUMENTATION: Survey Disk VM#: 6197
AGENCY: PID#: AG7392
SETTING CLASSIFICATION: Concrete Sea Wall
The bench mark is on the sea wall behind the Anna Maria Yacht Club Sales and
Service Building Boat House, 111.8 feet (34.1 m) NW of the centerline of Pine
Avenue, 36.9 feet (11.2 m) SW of the SW corner of the boathouse, 11.4 feet (3.5
m) NE of the SW end of the sea wall, and 9 feet (3 m) SW of a boat davit.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 4
PUBLICATION DATE: 11/21/1987
Station ID: 8726282 SUPERCEDED DATE: 04/21/2003
Name: ANNA MARIA CITY PIER, TAMPA BAY
FLORIDA
NOAA Chart: 11414 Latitude: 27° 32.0' N
USGS Quad: ANNA MARIA Longitude: 82° 43.8' W
T I D A L D A T U M S
Tidal datums at ANNA MARIA CITY PIER, TAMPA BAY based on:
LENGTH OF SERIES: 3 MONTHS
TIME PERIOD: JUNE-AUGUST 1976
TIDAL EPOCH: 1960-1978
CONTROL TIDE STATION: 8726364 MULLET KEY
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in FEET:
HIGHEST OBSERVED WATER LEVEL (05/15/1976) = 3.65
MEAN HIGHER HIGH WATER MHHW = 2.22
MEAN HIGH WATER MHW = 1.96
MEAN TIDE LEVEL MTL = 1.15
* NATIONAL GEODETIC VERTICAL DATUM NGVD29 = 0.85
MEAN LOW WATER MLW = 0.34
MEAN LOWER LOW WATER MLLW = 0.00
LOWEST OBSERVED WATER LEVEL (05/04/1976) = -0.59
* NGVD reference based on elevations published in Quad 270824, 1973, and NOS
leveling of 1979.
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In FEET above:
Stamping or Designation MLLW MHW
6282 A 1976 3.93 1.97
NO 5 1933 4.04 2.08
R 254 1965 11.96 10.00
S 254 1965 12.94 10.98
6282 B 1976 5.25 3.29
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 4
PUBLICATION DATE: 11/21/1987
Station ID: 8726282 SUPERCEDED DATE: 04/21/2003
Name: ANNA MARIA CITY PIER, TAMPA BAY
FLORIDA
NOAA Chart: 11414 Latitude: 27° 32.0' N
USGS Quad: ANNA MARIA Longitude: 82° 43.8' 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.