U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 4
PUBLICATION DATE: 10/01/1987
Station ID: 8726249 SUPERCEDED DATE: 04/21/2003
Name: NORTH SHORE, PALMA SOLA BAY
FLORIDA
NOAA Chart: 11414 Latitude: 27° 30.2' N
USGS Quad: ANNA MARIA Longitude: 82° 38.9' W
To reach the tidal bench marks from the post office in Bradenton, proceed west
on Highway 64 for 4 miles (6 km) to 75th Street North, then north on 75th Street
for 0.7 mile (1.1 km) to 9th Avenue, N.W., then west on 9th Avenue for 1.2 miles
(1.9 km) to 8603 9th Avenue. The bench marks are located in the area around the
residence. The tide gage and staff were located on a privately owned pier,
behind the residence.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 6249 A 1977
MONUMENTATION: Survey Disk VM#: 6167
AGENCY: PID#: AG7662
SETTING CLASSIFICATION: Copper-clad Steel Rod
The bench mark is on the property at 8603 9th Avenue, 22.6 feet (6.9 m) SW of
the SW corner of a cement block Bar-b-que Grill, 20.0 feet (6.1 m) NE of the NE
corner of the pier, 3.0 feet (0.9 m) ENE of a 1 foot (0.3 m) diameter oak tree,
and 2.3 feet (0.7 m) NW of a 0.7 foot (0.2 m) diameter oak tree. The bench mark
is crimped to the top of a copper-clad steel rod driven to a depth of 40 feet
(12 m) encased in a pipe level with the ground.
BENCH MARK STAMPING: 6249 B 1977
MONUMENTATION: Survey Disk VM#: 6168
AGENCY: PID#: AG7661
SETTING CLASSIFICATION: Concrete Monument
The bench mark is set in a concrete monument SE of the residence at 8603 9th
Avenue, 34.5 feet (10.5 m) SE of a 1 foot (0.3 m) diameter magnolia tree, 25.0
feet (7.6 m) south of a large cedar tree, 1.9 feet (0.6 m) WNW of the SW corner
of a flower shed (hot house), and at ground level.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 4
PUBLICATION DATE: 10/01/1987
Station ID: 8726249 SUPERCEDED DATE: 04/21/2003
Name: NORTH SHORE, PALMA SOLA BAY
FLORIDA
NOAA Chart: 11414 Latitude: 27° 30.2' N
USGS Quad: ANNA MARIA Longitude: 82° 38.9' W
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 6249 C 1977
MONUMENTATION: Survey Disk VM#: 6169
AGENCY: PID#: AG7660
SETTING CLASSIFICATION: Concrete Monument
The bench mark is set in a concrete monument near the residence at 8603 9th
Avenue, 36.5 feet (11.1 m) SE of a 5-trunked cedar tree, 2.2 feet (0.7 m) west
of a 1 foot (0.3 m) diameter palm tree, and 1.2 feet (0.4 m) north of an old
water well, and at ground level.
BENCH MARK STAMPING: 6249 E 1977
MONUMENTATION: Survey Disk VM#: 6170
AGENCY: PID#: AG7659
SETTING CLASSIFICATION: Concrete Monument
The bench mark is set in a concrete monument near the residence at 8603 9th
Avenue, 17.0 feet (5.2 m) north of the centerline of the driveway, 14.4 feet
(4.4 m) SW of the SW corner of a car garage, 11.0 feet (3.4 m) east of the main
entrance to the house, 3.6 feet (1.1 m) SE of the SE corner of the house, and at
ground level.
BENCH MARK STAMPING: 6249 F 1977
MONUMENTATION: Survey Disk VM#: 6171
AGENCY: PID#: AG7658
SETTING CLASSIFICATION: Concrete Monument
The bench mark is set in a concrete monument near the south end of fence line on
the west side of a driveway at 8603 9th Avenue, 81.5 feet (24.8 m) north of a
power pole, 12.5 feet (3.8 m), west of the centerline of the drive 1.3 feet (0.4
m) south of the south fence post, and 0.2 foot (0.1 m) below ground level.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 4
PUBLICATION DATE: 10/01/1987
Station ID: 8726249 SUPERCEDED DATE: 04/21/2003
Name: NORTH SHORE, PALMA SOLA BAY
FLORIDA
NOAA Chart: 11414 Latitude: 27° 30.2' N
USGS Quad: ANNA MARIA Longitude: 82° 38.9' W
T I D A L D A T U M S
Tidal datums at NORTH SHORE, PALMA SOLA BAY based on:
LENGTH OF SERIES: 5 MONTHS
TIME PERIOD: APRIL-OCTOBER 1977
TIDAL EPOCH: 1960-1978
CONTROL TIDE STATION: 8726247 BRADENTON
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in FEET:
HIGHEST OBSERVED WATER LEVEL (06/03/1977) = 3.39
MEAN HIGHER HIGH WATER (MHHW) = 2.18
MEAN HIGH WATER (MHW) = 1.90
MEAN TIDE LEVEL (MTL) = 1.10
MEAN LOW WATER (MLW) = 0.29
MEAN LOWER LOW WATER (MLLW) = 0.00
LOWEST OBSERVED WATER LEVEL (04/07/1977) = -0.90
National Geodetic Vertical Datum (NGVD 29)
Bench Mark Elevation Information In FEET above:
Stamping or Designation MLLW MHW
6249 A 1977 5.90 4.00
6249 B 1977 7.73 5.83
6249 C 1977 10.66 8.76
6249 E 1977 10.61 8.71
6249 F 1977 11.27 9.37
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 4
PUBLICATION DATE: 10/01/1987
Station ID: 8726249 SUPERCEDED DATE: 04/21/2003
Name: NORTH SHORE, PALMA SOLA BAY
FLORIDA
NOAA Chart: 11414 Latitude: 27° 30.2' N
USGS Quad: ANNA MARIA Longitude: 82° 38.9' 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 (NAVD 88).
NGVD 29 is a fixed datum adopted as a national standard geodetic reference for
heights but is now considered superseded. NGVD 29 is sometimes referred to as
Sea Level Datum of 1929 or as Mean Sea Level on some early issues of Geological
Survey Topographic Quads. NGVD 29 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 NGVD 29 are available from the National
Geodetic Survey (NGS) data base via the World Wide Web at
National Geodetic Survey.
NAVD 88 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. NAVD 88 replaces NGVD 29 as the national
standard geodetic reference for heights. Bench mark elevations relative to
NAVD 88 are available from NGS through the World Wide Web at
National Geodetic Survey.
NGVD 29 and NAVD 88 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 NAVD 88 elevation is shown on the Elevations of Tidal Datums Table Referred
to MLLW only when two or more of the bench marks listed have NAVD 88 elevations.
The NAVD 88 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, NAVD 88 bench mark elevations computed indirectly from the tidal
datums elevation table may differ slightly from NAVD 88 elevations listed for
each bench mark in the NGS database.