U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 10
Station ID: 8726278 PUBLICATION DATE: 05/12/2011
Name: REDFISH POINT, MANATEE RIVER
FL
NOAA Chart: 11414 Latitude: 27° 31.6' N ( 27.52670)
USGS Quad: PARRISH Longitude: 82° 28.9' W ( -82.48170)
To reach the tidal bench marks from the Ellenton Post Office, proceed north on
U.S. Highway 30l for 4 km (2.5 mi) to the Colony Cove Trailer Park, then SE on
Amsterdam Avenue for 0.2 km (0.1 mi) to Holland Street, then NE on Holland
Street for 0.3 km (0.2 mi) to Hague Drive, then SE on Hague Drive for 0.3 km
(0.2 mi) to Edgewater Drive, then south on Edgewater Drive for 0.2 km (0.1 mi)
to Driftwood Drive, then east on Driftwood Drive for 0.08 km (0.05 mi) to
Bayshore Drive, then south on Bayshore Drive for 0.3 km (0.2 mi) to the trailer
park pavilion. The bench marks are around the pavilion area. The tide gage and
staff were located on the wooden pier behind the pavilion.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 6278 A 1977
DESIGNATION: 872 6278 A TIDAL
MONUMENTATION: Tidal Station disk VM#: 6188
AGENCY: National Ocean Survey (NOS) IDB PID#: AG7724
SETTING CLASSIFICATION: Concrete piling support OPUS PID:
LATITUDE: 27° 31.7' N ( 27.52830) LONGITUDE: 82° 29.1' W ( -82.48500)
The primary bench mark is a disk set in the top of the NW piling support for the
pavilion, 15.54 m (51 ft) north of the stairs, 7.01 m (23 ft) NE of the SW
corner of the fireplace, 21.03 m (69 ft) south of the centerline of Bayshore
Drive, 17.68 m (58 ft) NNE of bench mark 6278 B 1977, and 0.30 m (1 ft) above
ground.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 10
Station ID: 8726278 PUBLICATION DATE: 05/12/2011
Name: REDFISH POINT, MANATEE RIVER
FL
NOAA Chart: 11414 Latitude: 27° 31.6' N ( 27.52670)
USGS Quad: PARRISH Longitude: 82° 28.9' W ( -82.48170)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 6278 B 1977
DESIGNATION: 872 6278 B TIDAL
MONUMENTATION: Tidal Station disk VM#: 6189
AGENCY: National Ocean Survey (NOS) IDB PID#: AG7722
SETTING CLASSIFICATION: Concrete monument OPUS PID:
LATITUDE: 27° 31.7' N ( 27.52830) LONGITUDE: 82° 29.1' W ( -82.48500)
The bench mark is a disk set in the top of a concrete monument, 17.68 m (58.0
ft) SSW of bench mark 6278 A 1977, 12.50 m (41.0 ft) WNW of the SW corner of the
pavilion, 6.71 m (22.0 ft) north of the shoreline, 0.76 m (2.5 ft) south of a
power pole.
BENCH MARK STAMPING: 6278 C 1977
DESIGNATION: 872 6278 C TIDAL
MONUMENTATION: Tidal Station disk VM#: 6190
AGENCY: National Ocean Survey (NOS) IDB PID#: AG7723
SETTING CLASSIFICATION: Concrete piling support OPUS PID:
LATITUDE: 27° 31.7' N ( 27.52830) LONGITUDE: 82° 29.1' W ( -82.48500)
The bench mark is a disk set in the top of a concrete piling support located on
the west side of the pavilion, 13.41 m (44.0 ft) east of bench mark 6278 B 1977,
12.50 m (41.0 ft) south of the NW corner of the pavilion, 4.27 m (14.0 ft) north
of the SW corner of the pavilion, and 0.3 m (1 ft) above ground level.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 10
Station ID: 8726278 PUBLICATION DATE: 05/12/2011
Name: REDFISH POINT, MANATEE RIVER
FL
NOAA Chart: 11414 Latitude: 27° 31.6' N ( 27.52670)
USGS Quad: PARRISH Longitude: 82° 28.9' W ( -82.48170)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 6278 E 1977
DESIGNATION: 872 6278 E TIDAL
MONUMENTATION: Tidal Station disk VM#: 6191
AGENCY: National Ocean Survey (NOS) IDB PID#: AG7721
SETTING CLASSIFICATION: Concrete monument OPUS PID:
LATITUDE: 27° 31.7' N ( 27.52830) LONGITUDE: 82° 29.1' W ( -82.48500)
The bench mark is a disk set in the top of a concrete monument, 36.58 m (120.0
ft) east of bench mark 6278 C 1977, 10.97 m (36 ft) SE of the SE corner of the
pavillon, 7.32 m (24.0 ft) west of the tree and brush line, 0.46 m (1.5 ft) west
of a powerline pole.
BENCH MARK STAMPING: 6278 F 1977
DESIGNATION: 872 6278 F TIDAL
MONUMENTATION: Tidal Station disk VM#: 6192
AGENCY: National Ocean Survey (NOS) IDB PID#: AG7720
SETTING CLASSIFICATION: Concrete piling support OPUS PID:
LATITUDE: 27° 31.7' N ( 27.52830) LONGITUDE: 82° 29.1' W ( -82.48500)
The bench mark is a disk set in the top of the second concrete support pile for
the Pavilion south of the NE corner of the Pavilion, 19.81 m (65 ft) south of
the centerline of Bayshore drive, and 0.30 m (1 ft) above ground.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 10
Station ID: 8726278 PUBLICATION DATE: 05/12/2011
Name: REDFISH POINT, MANATEE RIVER
FL
NOAA Chart: 11414 Latitude: 27° 31.6' N ( 27.52670)
USGS Quad: PARRISH Longitude: 82° 28.9' W ( -82.48170)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 6278 G 2007
DESIGNATION: 872 6278 G TIDAL
MONUMENTATION: Flange-encased Rod VM#: 19893
AGENCY: Florida Dept. of Environmental
Protection (FLDEP) IDB PID#: DL1823
SETTING CLASSIFICATION: Stainless steel rod OPUS PID#:
LATITUDE: 27° 31.8' N ( 27.52922) LONGITUDE: 82° 29.2' W ( -82.48600)
The bench mark is a flange-encased rod located 75.5 m (247.8 ft) NW of bench
mark 6278 A 1977, 32.3 m (106.0 ft) WNW of parcel locker 82-83 at the west end
of the Bayshore Drive mail station, 20.4 m (67.0 ft) WSW of the SW corner of the
house at 577 Bayshore, 37.7 SW of the centerline of Bayshore Drive, and 1.0 m
(3.2 ft) NNE of a carsonite witness post. The bench mark is a flange-encased
rod a stainless steel rod driven to refusal at a depth of 4.3 m (14.0 ft) with a
NGS logo cap flush with the ground and 0.3 m (1.0 ft) below the level of
Bayshore Drive, the datum point being recessed 0.1 m (0.3 ft) below the level of
the NGS logo cap.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 10
Station ID: 8726278 PUBLICATION DATE: 05/12/2011
Name: REDFISH POINT, MANATEE RIVER
FL
NOAA Chart: 11414 Latitude: 27° 31.6' N ( 27.52670)
USGS Quad: PARRISH Longitude: 82° 28.9' W ( -82.48170)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 6278 H 2007
DESIGNATION: 872 6278 H TIDAL
MONUMENTATION: Flange-encased Rod VM#: 19894
AGENCY: Florida Dept. of Environmental
Protection (FLDEP) IDB PID#: DL1824
SETTING CLASSIFICATION: Stainless steel rod OPUS PID:
LATITUDE: 27° 31.7' N ( 27.52900) LONGITUDE: 82° 29.1' W ( -82.48497)
The bench mark is a flange-encased rod located 15.8 m (51.7 ft) north of bench
mark 6278 F 1977, 8.8 m (29.0 ft) NE of a flag pole, 4.5 m (14.6 ft) SSE of the
centerline of Bayshore drive, and 0.3 m (0.9 ft) ESE of a carsonite witness
post. The bench mark is a flange-encased rod, being the top of a stainless
steel rod driven to refusal at a depth of 2.7 m (9.0 ft) with a NGS logo cap
flush with the ground and 0.3 m (1.0 ft) below the level of Bayshore Drive, the
datum point being recessed 0.03 m (0.1 ft) below the level of NGS logo cap.
BENCH MARK STAMPING: 6278 J 2007
DESIGNATION: 872 6278 J TIDAL
MONUMENTATION: Survey disk VM#: 19895
AGENCY: Florida Dept. of Environmental
Protection (FLDEP) IDB PID#: DL1822
SETTING CLASSIFICATION: Round concrete base OPUS PID#: DL1822
LATITUDE: 27° 31.8' N ( 27.53019) LONGITUDE: 82° 29.2' W ( -82.48636)
The bench mark is a disk set flush in the top of a round concrete base for the
sewage pump and 0.5 m (1.6 ft) above the level of Bayshore drive, 14.2 m (46.6
ft) west of the centerline of Bayshore drive, 11.7 m (38.3 ft) NNW of the
centerline of the service-handicap drive of the Bayshore Drive Fitness Center at
564 Bayshore Drive, and 2.3 m (7.55 ft) NE of a carsonite witness post.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 10
Station ID: 8726278 PUBLICATION DATE: 05/12/2011
Name: REDFISH POINT, MANATEE RIVER
FL
NOAA Chart: 11414 Latitude: 27° 31.6' N ( 27.52670)
USGS Quad: PARRISH Longitude: 82° 28.9' W ( -82.48170)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: U 565 2002
DESIGNATION: U 565
MONUMENTATION: Survey disk VM#: 19896
AGENCY: Florida Dept. of Environmental
Protection (FLDEP) IDB PID#: DE8845
SETTING CLASSIFICATION: Round concrete monument OPUS PID:
LATITUDE: 27° 31.8' N ( 27.53075) LONGITUDE: 82° 30.3' W ( -82.50525)
The bench mark is a disk set in the top of a round concrete monument flush with
the ground and about 0.15 m (0.5 ft) below the level of U.S. Highway 301, 27.67
m (90.8 ft) north of the edge of the pavement of the northbound on ramp to
Interstate 75, 5.09 m (16.7) ft NNE of a concrete light pole, 5.03 m (16.5 ft)
east of the approximate east edge of a drainage ditch, 0.46 m (1.5 ft) south of
a chain link fence, and 0.43 m (1.4 ft) south of a carsonite witness post.
NOTE: A magnet was buried on the south side of the mark.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 7 of 10
Station ID: 8726278 PUBLICATION DATE: 05/12/2011
Name: REDFISH POINT, MANATEE RIVER
FL
NOAA Chart: 11414 Latitude: 27° 31.6' N ( 27.52670)
USGS Quad: PARRISH Longitude: 82° 28.9' W ( -82.48170)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: R 565 2002
DESIGNATION: R 565
MONUMENTATION: Survey disk VM#: 19898
AGENCY: Florida Dept. of Environmental
Protection (FLDEP) IDB PID#: DE8844
SETTING CLASSIFICATION: Round concrete monument OPUS PID:
LATITUDE: 27° 32.2' N ( 27.53633) LONGITUDE: 82° 29.5' W ( -82.49181)
The bench mark is a disk set in the top of a round concrete monument recessed
0.06 m (0.2 ft) below the level of the ground and about 0.24 m (0.8 ft) above
the level of Victory Road, 18.01 m (59.1 ft) south of power pole number 5 1882
1587 0 8, 16.31 m (53.5 ft) ESE of the center of a metal gate, 13.75 m (45.1 ft)
west of the approximate centerline of Victory Road, 12.50 m (41.0 ft) south of
the approximate centerline of an asphalt entrance road leading to a loading
dock, 6.07 m (19.9 ft) east of a metal light pole, 1.68 m (5.5 ft) west of a
chain-link fence corner post, 0.43 m (1.4 ft) north of a chain-link fence, and
0.27 m (0.9 ft) north of a carsonite witness post. Note: A magnet was buried on
the south side of the mark.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 8 of 10
Station ID: 8726278 PUBLICATION DATE: 05/12/2011
Name: REDFISH POINT, MANATEE RIVER
FL
NOAA Chart: 11414 Latitude: 27° 31.6' N ( 27.52670)
USGS Quad: PARRISH Longitude: 82° 28.9' W ( -82.48170)
T I D A L D A T U M S
Tidal datums at REDFISH POINT, MANATEE RIVER based on:
LENGTH OF SERIES: 1 MONTH
TIME PERIOD: September 1977 - September 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 = 0.696
MEAN HIGH WATER MHW = 0.623
North American Vertical Datum NAVD88 = 0.450
MEAN SEA LEVEL MSL = 0.371
MEAN TIDE LEVEL MTL = 0.363
MEAN LOW WATER MLW = 0.103
MEAN LOWER LOW WATER MLLW = 0.000
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
6278 A 1977 2.101 1.478
6278 B 1977 1.380 0.757
6278 C 1977 2.102 1.478
6278 E 1977 1.701 1.078
6278 F 1977 2.086 1.463
6278 G 2007 1.741 1.118
6278 H 2007 2.131 1.508
6278 J 2007 2.467 1.844
U 565 2002 2.768 2.145
R 565 2002 5.656 5.033
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 9 of 10
Station ID: 8726278 PUBLICATION DATE: 05/12/2011
Name: REDFISH POINT, MANATEE RIVER
FL
NOAA Chart: 11414 Latitude: 27° 31.6' N ( 27.52670)
USGS Quad: PARRISH Longitude: 82° 28.9' W ( -82.48170)
Foot Notes:
Geodetic heights of the bench marks meet all NOAA/NOS/NGS quality control
standards for Second Order, Class 1 leveling. It is advised that a confirmation
set of levels be established for bench marks 6278 G 2007, 6278 H 2007, 6278 J
2007, R 565 2002, and U 565 2002 to verify height differences before using tidal
bench mark elevation information.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 10 of 10
Station ID: 8726278 PUBLICATION DATE: 05/12/2011
Name: REDFISH POINT, MANATEE RIVER
FL
NOAA Chart: 11414 Latitude: 27° 31.6' N ( 27.52670)
USGS Quad: PARRISH Longitude: 82° 28.9' W ( -82.48170)
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.