U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 7
Station ID: 8726384 PUBLICATION DATE: 10/22/2020
Name: PORT MANATEE, TAMPA BAY
FL
NOAA Chart: 11416 Latitude: 27° 38.3' N ( 27.63833)
USGS Quad: COCKROACH BAY Longitude: 82° 33.8' W ( -82.56250)
To reach the tidal bench marks from the junction of I-275 South and US Highway
41 North, proceed north on US Highway 41 for 5.5 km (3.40 mi) , then proceed
west on Piney Point Road for 0.6 km (0.35 mi), then proceed SW on Harley Road
for 1.2 km (0.75 mi) through the security gate (Harley road then turns into
North Dock Road) and continue to the Port Manatee Basin. The bench marks are
around the basin in the port area. The tide station is located just north of the
NW corner of the turning basin along the bulkhead fronting the bay, near Berth
4.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 6384 C 1976
DESIGNATION: 872 6384 C TIDAL
MONUMENTATION: Tidal Station disk VM#: 7807
AGENCY: National Ocean Survey (NOS) IDB PID#: AG7340
SETTING CLASSIFICATION: Building foundation OPUS PID:
LATITUDE: 27° 38.0' N ( 27.63374) LONGITUDE: 82° 33.5' W ( -82.55828)
The bench mark is a disk set in the concrete footing of a blue aluminum building
(warehouse) located east of the Port Manatee turning basin area, 43.37 m (142.29
ft) east of the east bulkhead of the basin, 1.19 m (3.90 ft) north of the south
garage door of two doors on the west side of the building, and 0.30 m (0.98 ft)
west of the building.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 7
Station ID: 8726384 PUBLICATION DATE: 10/22/2020
Name: PORT MANATEE, TAMPA BAY
FL
NOAA Chart: 11416 Latitude: 27° 38.3' N ( 27.63833)
USGS Quad: COCKROACH BAY Longitude: 82° 33.8' W ( -82.56250)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 6384 K 2004
DESIGNATION: 872 6384 K
MONUMENTATION: Tidal Station disk VM#: 17596
AGENCY: National Ocean Service (NOS) IDB PID:
SETTING CLASSIFICATION: Sea wall OPUS PID#: BBBT27
LATITUDE: 27° 38.3' N ( 27.63842) LONGITUDE: 82° 33.8' W ( -82.56292)
The bench mark is a disk set in the W sea wall 80.25 m (263.29 ft) SW from the W
corner of the Florida Fish and Wildlife building at the entrance the pump
station, 52.50 m (172.24 ft ) SW of Fire hydrant K81A in the NE corner of the
parking lot, 10.20 m (33.46 ft) SW from the center of the only bollard on the N
sea wall, and 6.40 m (21.00 ft) NE of the most N bollard on the W sea wall.
BENCH MARK STAMPING: 6384 L 2004
DESIGNATION: 872 6384 L
MONUMENTATION: Tidal Station disk VM#: 17597
AGENCY: National Ocean Service (NOS) IDB PID:
SETTING CLASSIFICATION: concrete Sea wall OPUS PID:
LATITUDE: 27° 38.2' N ( 27.63728) LONGITUDE: 82° 33.8' W ( -82.56308)
The primary bench mark is a disk set in the western sea wall in the concrete
bulkhead of berth 4, located 34.50 m (113.16 ft) NW of the SW corner of
warehouse 210, 0.5 m (1.5 ft) west of a bollard, 0.435 m (1.4 ft) NW of the SE
edge of the concrete bulkhead.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 7
Station ID: 8726384 PUBLICATION DATE: 10/22/2020
Name: PORT MANATEE, TAMPA BAY
FL
NOAA Chart: 11416 Latitude: 27° 38.3' N ( 27.63833)
USGS Quad: COCKROACH BAY Longitude: 82° 33.8' W ( -82.56250)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 6384 L 2007
DESIGNATION: 872 6384 L TIDAL
MONUMENTATION: Survey disk VM#: 19857
AGENCY: Florida Dept. of Environmental
Protection (FLDEP) IDB PID#: DL1870
SETTING CLASSIFICATION: Concrete sea wall OPUS PID:
LATITUDE: 27° 38.1' N ( 27.63510) LONGITUDE: 82° 33.5' W ( -82.55872)
The bench mark is a disk set flush in the top of the concrete seawall just west
of the NE corner of the boat basin, 25.3 m (83.0 ft) WSW of bench mark 6384 K
2007, 23.3 m (76.4 ft) south of the SE corner of a large gray metal building,
21.9 m (71.6 ft) ENE of the second mooring bollard west of the NE corner of the
boat basin, 21.8 m (31.4 ft) WSW of the first mooring bollard west of the NE
corner of the boat basin, and about 0.6 m (2.0 ft) north of the south edge of
the seawall.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 7
Station ID: 8726384 PUBLICATION DATE: 10/22/2020
Name: PORT MANATEE, TAMPA BAY
FL
NOAA Chart: 11416 Latitude: 27° 38.3' N ( 27.63833)
USGS Quad: COCKROACH BAY Longitude: 82° 33.8' W ( -82.56250)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: DNR JEG 1976
DESIGNATION: JEG
MONUMENTATION: Bench Mark disk VM#: 19858
AGENCY: Florida Dept. of Environmental
Protection (FLDEP) IDB PID#: AG7336
SETTING CLASSIFICATION: Copper-clad steel rod OPUS PID:
LATITUDE: 27° 38.2' N ( 27.63747) LONGITUDE: 82° 32.9' W ( -82.54811)
The bench mark is a disk located 17.6 m (57.6 ft) east of the centerline of
Reeder Road, 13.6 m (44.6 ft) SW of the centerline of Piney Point Road, 10.0 m
(32.9 ft) NNW of the center of a cluster of five palm trees in the center of a
round rock garden, 7.3 m (23.8 ft) SSE of a stop sign, 6.9 m (22.6 ft) SW of a
wooden telephone pole numbered 161-2 with one guy wire attached, and 0.3 m (1.0
ft) north of a carsonite witness post. The bench mark is set below the level of
Piney Point Road, crimped to a copper clad steel rod encased in a 10 cm (4-inch)
pvc pipe with a concrete kick block 0.5 m (1.5 ft).
BENCH MARK STAMPING: 6384 M 2014
DESIGNATION: 872 6384 M
MONUMENTATION: Tidal Station disk VM#: 21002
AGENCY: National Ocean Service (NOS) IDB PID:
SETTING CLASSIFICATION: Concrete bulkhead OPUS PID#: BBFP57
LATITUDE: 27° 38.2' N ( 27.63625) LONGITUDE: 82° 33.8' W ( -82.56319)
The bench mark is a disk set in the W sea wall, 46.97m (153.8 ft) NW of the SW
corner of warehouse 210, 1.92m (6.3 ft) W of a ballard, and 0.435m (1.4 ft) NW
of the SE edge of the concrete bulkhead.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 7
Station ID: 8726384 PUBLICATION DATE: 10/22/2020
Name: PORT MANATEE, TAMPA BAY
FL
NOAA Chart: 11416 Latitude: 27° 38.3' N ( 27.63833)
USGS Quad: COCKROACH BAY Longitude: 82° 33.8' W ( -82.56250)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 6384 N 2014
DESIGNATION: 872 6384 N
MONUMENTATION: Bench Mark disk VM#: 21003
AGENCY: National Ocean Service (NOS) IDB PID:
SETTING CLASSIFICATION: Concrete bulkhead OPUS PID:
LATITUDE: 27° 38.1' N ( 27.63522) LONGITUDE: 82° 33.8' W ( -82.56331)
The benchmark is a disk set in the W sea wall, 5.331 m (17.5 ft) S of the first
ballard N of the S corner of sea wall, 34.43 m (113.0 ft) WSW of a light tower,
0.240 m (0.8 ft) W of the E edge of the concrete sea wall.
BENCH MARK STAMPING: 6384 P 2017
DESIGNATION: 872 6384 P
MONUMENTATION: Tidal Station disk VM#: 22617
AGENCY: National Ocean Service (NOS) IDB PID:
SETTING CLASSIFICATION: Concrete deck OPUS PID#: BBFN97
LATITUDE: 27° 38.0' N ( 27.63292) LONGITUDE: 82° 33.6' W ( -82.55928)
The bench mark is a disk 61m (200 ft) west of the southeast corner of the ship
turning basin (corner of berths 8 and 9), 3m (9.7 ft) south of the newly
constructed north face of the berth 9 dock, and 1.7m (5.6 ft) west of a 4 inch
(10 cm) wide joint in the newly upgraded berth 9 dock.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 7
Station ID: 8726384 PUBLICATION DATE: 10/22/2020
Name: PORT MANATEE, TAMPA BAY
FL
NOAA Chart: 11416 Latitude: 27° 38.3' N ( 27.63833)
USGS Quad: COCKROACH BAY Longitude: 82° 33.8' W ( -82.56250)
T I D A L D A T U M S
Tidal datums at PORT MANATEE, TAMPA BAY based on:
LENGTH OF SERIES: 17 YEARS
TIME PERIOD: 12/99-11/08, 01/12-12/19
TIDAL EPOCH: 1983-2001
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 (09/02/2016) = 1.377
MEAN HIGHER HIGH WATER MHHW = 0.663
MEAN HIGH WATER MHW = 0.581
North American Vertical Datum NAVD88 = 0.486
MEAN SEA LEVEL MSL = 0.353
MEAN TIDE LEVEL MTL = 0.346
MEAN LOW WATER MLW = 0.111
MEAN LOWER LOW WATER MLLW = 0.000
LOWEST OBSERVED WATER LEVEL (01/03/2008) = -0.618
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
6384 C 1976 2.976 2.395
6384 K 2004 2.582 2.001
6384 L 2004 2.584 2.003
6384 L 2007 2.659 2.078
DNR JEG 1976 2.033 1.452
6384 M 2014 2.583 2.002
6384 N 2014 2.578 1.997
6384 P 2017 2.831 2.250
Foot Notes:
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 7 of 7
Station ID: 8726384 PUBLICATION DATE: 10/22/2020
Name: PORT MANATEE, TAMPA BAY
FL
NOAA Chart: 11416 Latitude: 27° 38.3' N ( 27.63833)
USGS Quad: COCKROACH BAY Longitude: 82° 33.8' W ( -82.56250)
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.