U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 5
Station ID: 8726254 PUBLICATION DATE: 02/05/2004
Name: PERICO BAYOU
FL
NOAA Chart: 11414 Latitude: 27° 29.9' N ( 27.49830)
USGS Quad: BRADENTON BEACH Longitude: 82° 40.1' W ( -82.66830)
To reach the tidal bench marks from the Bradenton Post Office, travel west on
State Route 64 (Manatee Avenue West) for 7.1 km (4.4 mi) to 75th Street, then
turn right and proceed north on 75th Street for 1.3 km (0.8 mi) to 9th Avenue
NW, then turn left and proceed west on 9th Avenue, NW for 1.6 km (1.0 mi) to a
fence with a dirt road beyond it, then turn left and proceed south along the
dirt road. The bench marks were along the road. The tide gage and staff were
located near the end of the road.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 6254 A 1977
DESIGNATION: 872 6254 A TIDAL
MONUMENTATION: Tidal Station disk VM#: 6172
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Unspecified deep rod OPUS PID:
LATITUDE: 27° 29.9' N ( 27.49830) LONGITUDE: 82° 40.1' W ( -82.66830)
The primary bench mark is a disk located 14.33 m (47.0 ft) north of the
shoreline of South Point, 7.62 m (25.0 ft) west of the east bank shoreline, and
2.13 m (7.0 ft) east of the centerline of the dirt road. The bench mark is
crimped to an unspecified deep rod driven to an unspecified depth.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 5
Station ID: 8726254 PUBLICATION DATE: 02/05/2004
Name: PERICO BAYOU
FL
NOAA Chart: 11414 Latitude: 27° 29.9' N ( 27.49830)
USGS Quad: BRADENTON BEACH Longitude: 82° 40.1' W ( -82.66830)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 6254 B 1977
DESIGNATION: 872 6254 B TIDAL
MONUMENTATION: Tidal Station disk VM#: 6173
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Post OPUS PID:
LATITUDE: 27° 29.9' N ( 27.49830) LONGITUDE: 82° 40.1' W ( -82.66830)
The bench mark is a disk set on a post located 31.09 m (102.0 ft) north of bench
mark 6254 A 1977, 3 m (10 ft) west of the centerline of the dirt road, and 1.83
m (6.0 ft) east of the west bank shoreline.
BENCH MARK STAMPING: 6254 C 1977
DESIGNATION: 872 6254 C TIDAL
MONUMENTATION: Tidal Station disk VM#: 6174
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Unspecified deep rod OPUS PID:
LATITUDE: 27° 29.9' N ( 27.49830) LONGITUDE: 82° 40.1' W ( -82.66830)
The bench mark is a disk set in a rod 27.43 m (90.0 ft) north of bench mark 6254
B 1977, 14.27 m (14.0 ft) east of the centerline of the dirt road, and 2.44 m
(8.0 ft) west of the east bank shoreline. The bench mark is crimped to an
unspecified deep rod driven to an unspecified depth.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 5
Station ID: 8726254 PUBLICATION DATE: 02/05/2004
Name: PERICO BAYOU
FL
NOAA Chart: 11414 Latitude: 27° 29.9' N ( 27.49830)
USGS Quad: BRADENTON BEACH Longitude: 82° 40.1' W ( -82.66830)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 6254 E 1977
DESIGNATION: 872 6254 E TIDAL
MONUMENTATION: Tidal Station disk VM#: 6175
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Post OPUS PID:
LATITUDE: 27° 29.9' N ( 27.49830) LONGITUDE: 82° 40.1' W ( -82.66830)
The bench mark is set on a post located 24.69 m (81.0 ft) north of bench mark
6254 C 1977, 2.74 m (9.0 ft) west of the centerline of the dirt road, and 2.44 m
(8.0 ft) east of the west bank shoreline.
BENCH MARK STAMPING: 6254 F 1977
DESIGNATION: 872 6254 F TIDAL
MONUMENTATION: Tidal Station disk VM#: 6176
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Post OPUS PID:
LATITUDE: 27° 29.9' N ( 27.49830) LONGITUDE: 82° 40.1' W ( -82.66830)
The bench mark is a disk set on a post 24.69 m (81.0 ft) north of bench mark
6254 E 1977, 3.35 m (11.0 ft) east of the west bank shoreline, and 2.44 m (8.0
ft) west of the centerline of the dirt road.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 5
Station ID: 8726254 PUBLICATION DATE: 02/05/2004
Name: PERICO BAYOU
FL
NOAA Chart: 11414 Latitude: 27° 29.9' N ( 27.49830)
USGS Quad: BRADENTON BEACH Longitude: 82° 40.1' W ( -82.66830)
T I D A L D A T U M S
Tidal datums at PERICO BAYOU based on:
LENGTH OF SERIES: 1 MONTH
TIME PERIOD: July 1977 - July 1977
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION: 8726247 BRADENTON, MANATEE RIVER
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
MEAN HIGHER HIGH WATER MHHW = 0.640
MEAN HIGH WATER MHW = 0.551
MEAN SEA LEVEL MSL = 0.323
MEAN TIDE LEVEL MTL = 0.318
MEAN LOW WATER MLW = 0.085
MEAN LOWER LOW WATER MLLW = 0.000
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
6254 A 1977 1.364 0.813
6254 B 1977 1.121 0.570
6254 C 1977 1.273 0.722
6254 E 1977 1.141 0.590
6254 F 1977 1.112 0.561
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 5
Station ID: 8726254 PUBLICATION DATE: 02/05/2004
Name: PERICO BAYOU
FL
NOAA Chart: 11414 Latitude: 27° 29.9' N ( 27.49830)
USGS Quad: BRADENTON BEACH Longitude: 82° 40.1' W ( -82.66830)
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.