U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 6
Station ID: 8723574 PUBLICATION DATE: 02/01/2005
Name: MANATEE CREEK, BARNES SOUND
FL
NOAA Chart: 11463 Latitude: 25° 14.1' N ( 25.23500)
USGS Quad: BLACKWATER SOUND Longitude: 80° 26.1' W ( -80.43500)
To reach the tidal bench marks from the post office in Florida City, proceed
east on State Highway 27 (West Palm Drive) for 0.6 km (0.4 mi) to U.S. Highway
1, turn right and go south on U.S. Highway 1 for 17.9 km (11.1 mi) to a
drawbridge over Aerojet Canal C-111, continue south on U.S. Highway 1 for 6.0 km
(3.7 mi) to Monroe/Dade County line. The bench marks are located along U.S.
Highway 1. The tide gage and staff were located west of U.S. Highway 1 on a
pier SSW of a dirt parking area.
T I D A L B E N C H M A R K S
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 6
Station ID: 8723574 PUBLICATION DATE: 02/01/2005
Name: MANATEE CREEK, BARNES SOUND
FL
NOAA Chart: 11463 Latitude: 25° 14.1' N ( 25.23500)
USGS Quad: BLACKWATER SOUND Longitude: 80° 26.1' W ( -80.43500)
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: W 316 1970
DESIGNATION: W 316
ALIAS:
MONUMENTATION: Bench Mark disk VM#: 10744
AGENCY: National Geodetic Survey (NGS) IDB PID#: AC1087
SETTING CLASSIFICATION: Concrete block OPUS PID:
LATITUDE: 25° 14.1' N ( 25.23500) LONGITUDE: 80° 26.0' W ( -80.43330)
The primary bench mark is a disk set flush in a 0.61 m (2.0 ft) square concrete
block, 80 m (261 ft) south of the Monroe/Dade County line, in line with a drive
leading to U.S. Highway 1, 29 m (96 ft) SW of the centerline of U.S. Highway 1,
1 m (3 ft) below the level of U.S. Highway 1, and 0.30 m (1.0 ft) above ground
level.
BENCH MARK STAMPING: LONG SOUND 1961
DESIGNATION: LONG SOUND
ALIAS:
MONUMENTATION: Triangulation Station disk VM#: 10740
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: AC1090
SETTING CLASSIFICATION: Concrete monument OPUS PID:
LATITUDE: 25° 14.2' N ( 25.23670) LONGITUDE: 80° 26.0' W ( -80.43330)
The bench mark is a disk set flush in a concrete monument on the south side of
U.S. Highway 1, on the road right-of-way, 24 m (79 ft) NW of the Monroe/Dade
County line sign, 15.33 m (50.3 ft) west of the centerline of U.S. Highway 1, 4
m (13 ft) east of a telephone line, 0.73 m (2.4 ft) east of a metal witness
post, and 0.06 m (0.2 ft) above ground level.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 6
Station ID: 8723574 PUBLICATION DATE: 02/01/2005
Name: MANATEE CREEK, BARNES SOUND
FL
NOAA Chart: 11463 Latitude: 25° 14.1' N ( 25.23500)
USGS Quad: BLACKWATER SOUND Longitude: 80° 26.1' W ( -80.43500)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: LONG SOUND NO 1 1961
DESIGNATION: LONG SOUND RM 1
ALIAS:
MONUMENTATION: Reference Mark disk VM#: 10741
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: AC1089
SETTING CLASSIFICATION: Concrete monument OPUS PID:
LATITUDE: 25° 14.2' N ( 25.23670) LONGITUDE: 80° 26.0' W ( -80.43330)
The bench mark is a disk set flush in a concrete monument, 28.65 m (94.0 ft)
west of the centerline of U.S. Highway 1, 21.40 m (70.2 ft) SW of bench mark
LONG SOUND 1961, 9 m (29 ft) west of telephone pole No. 15417, 7 m (22 ft) north
of the north edge of the water inlet, and 0.06 m (0.2 ft) above ground level.
BENCH MARK STAMPING: LONG SOUND NO 2 1961
DESIGNATION: LONG SOUND RM 2
ALIAS:
MONUMENTATION: Reference Mark disk VM#: 10742
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: AC1091
SETTING CLASSIFICATION: Concrete monument OPUS PID:
LATITUDE: 25° 14.2' N ( 25.23670) LONGITUDE: 80° 26.0' W ( -80.43330)
The bench mark is a disk set flush in a concrete monument, 28 m (92 ft) west of
the centerline of U.S. Highway 1, 20.03 m (65.7 ft) NW of bench mark LONG SOUND
1961, 10.73 m (35.2 ft) SW of telephone pole No. 6, 5 m (15 ft) east of a tree,
0.30 m (1.0 ft) east of a metal witness post, and 0.06 m (0.2 ft) above ground
level.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 6
Station ID: 8723574 PUBLICATION DATE: 02/01/2005
Name: MANATEE CREEK, BARNES SOUND
FL
NOAA Chart: 11463 Latitude: 25° 14.1' N ( 25.23500)
USGS Quad: BLACKWATER SOUND Longitude: 80° 26.1' W ( -80.43500)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: H 274 1966
DESIGNATION: H 274
ALIAS:
MONUMENTATION: Bench Mark disk VM#: 10743
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: AC1092
SETTING CLASSIFICATION: Concrete abutment OPUS PID:
LATITUDE: 25° 14.3' N ( 25.23830) LONGITUDE: 80° 26.0' W ( -80.43330)
The bench mark is a disk set flush in the south end of the east concrete
abutment of the highway bridge, 0.2 km (0.1 mi) north of the Monroe/Dade County
line, 26 m (84 ft) south of a power tower No 119 near the junction of gravel
road leading east, and 10.21 m (33.5 ft) NE of the centerline of U.S. Highway 1.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 6
Station ID: 8723574 PUBLICATION DATE: 02/01/2005
Name: MANATEE CREEK, BARNES SOUND
FL
NOAA Chart: 11463 Latitude: 25° 14.1' N ( 25.23500)
USGS Quad: BLACKWATER SOUND Longitude: 80° 26.1' W ( -80.43500)
T I D A L D A T U M S
Tidal datums at MANATEE CREEK, BARNES SOUND based on:
LENGTH OF SERIES: 1 YEAR
TIME PERIOD: July 1970 - June 1971
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION: 8723170 MIAMI BEACH (CITY PIER)
Elevations of tidal datums referred to Mean Sea Level (MSL), in METERS:
HIGHEST OBSERVED WATER LEVEL (10/24/1971) = 0.261
North American Vertical Datum NAVD88 = 0.296
MEAN SEA LEVEL MSL = 0.000
LOWEST OBSERVED WATER LEVEL (02/11/1971) = -0.233
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MSL
W 316 1970 0.707
LONG SOUND 1961 0.189
LONG SOUND NO 1 1961 0.156
LONG SOUND NO 2 1961 0.221
H 274 1966 1.445
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 6
Station ID: 8723574 PUBLICATION DATE: 02/01/2005
Name: MANATEE CREEK, BARNES SOUND
FL
NOAA Chart: 11463 Latitude: 25° 14.1' N ( 25.23500)
USGS Quad: BLACKWATER SOUND Longitude: 80° 26.1' W ( -80.43500)
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.