U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 7
Station ID: 8723044 PUBLICATION DATE: 02/13/2004
Name: DUMFOUNDLING BAY
FL
NOAA Chart: 11466 Latitude: 25° 56.5' N ( 25.94170)
USGS Quad: NORTH MIAMI Longitude: 80° 7.5' W ( -80.12500)
To reach the tidal bench marks from the intersection of State Highway A1A
(Collins Avenue) and State Road 826 (Sunny Isles Boulevard), proceed north on
State Highway A1A for 1.3 km (0.8 mi) to 178th Street, then west on 178th Street
for 0.2 km (0.1 mi) to Atlantic Boulevard, then north on Atlantic Boulevard for
0.1 km (0.05 mi) to 180th Drive, then NW on 180th Drive for 0.24 km (0.15 mi) to
its end at a north/south road. The bench marks are in the area between the
north/south road and the seawall. The tide gage and staff were located on the
concrete seawall behind and across the street from the Caribbean Breeze
Condominiums.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: NO 3 1973
DESIGNATION: 872 3044 TIDAL 3
MONUMENTATION: Tidal Station disk VM#: 5747
AGENCY: National Ocean Survey (NOS) IDB PID#: AC3285
SETTING CLASSIFICATION: Concrete sea wall OPUS PID:
LATITUDE: 25° 56.5' N ( 25.94170) LONGITUDE: 80° 7.5' W ( -80.12500)
The primary bench mark is a disk set flush in the concrete seawall west of the
junction of the north/south road and 180th Drive, WNW of the Caribbean Breeze
Condominiums, and 33.65 m (110.4 ft) north of the NW property corner of the Eden
Roc Condominiums.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 7
Station ID: 8723044 PUBLICATION DATE: 02/13/2004
Name: DUMFOUNDLING BAY
FL
NOAA Chart: 11466 Latitude: 25° 56.5' N ( 25.94170)
USGS Quad: NORTH MIAMI Longitude: 80° 7.5' W ( -80.12500)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: NO 5 1973
DESIGNATION: 872 3044 TIDAL 5
MONUMENTATION: Tidal Station disk VM#: 5748
AGENCY: National Ocean Survey (NOS) IDB PID#: AC3286
SETTING CLASSIFICATION: Concrete sea wall OPUS PID:
LATITUDE: 25° 56.5' N ( 25.94170) LONGITUDE: 80° 7.5' W ( -80.12500)
The bench mark is a disk set flush in the concrete seawall NW of the junction of
the north/south road and 180th Drive, 61 m (200 ft) north of bench mark NO 3
1973, and 30 m (100 ft) north of the SW corner of a wooded area.
BENCH MARK STAMPING: 3044 F 1982 BSM
DESIGNATION: 872 3044 F TIDAL FLDNR
MONUMENTATION: Tidal Station disk VM#: 5749
AGENCY: Florida Department of Natural Resources
(FLDNR) IDB PID#: AC3284
SETTING CLASSIFICATION: Concrete box drain OPUS PID:
LATITUDE: 25° 56.5' N ( 25.94170) LONGITUDE: 80° 7.5' W ( -80.12500)
The bench mark is a disk set flush in the corner of a 1 m x 1 m (4 ft x 3 ft)
concrete box drain located across the road from the junction of the north/south
road and 180th Drive, 16.00 m (52.5 ft) WNW of bench mark 3044 H 1982 BSM, 4.48
m (14.7 ft) west of the centerline of the north/south road.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 7
Station ID: 8723044 PUBLICATION DATE: 02/13/2004
Name: DUMFOUNDLING BAY
FL
NOAA Chart: 11466 Latitude: 25° 56.5' N ( 25.94170)
USGS Quad: NORTH MIAMI Longitude: 80° 7.5' W ( -80.12500)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 3044 G 1982 BSM
DESIGNATION: 872 3044 G TIDAL FLDNR
MONUMENTATION: Tidal Station disk VM#: 5750
AGENCY: Florida Department of Natural Resources
(FLDNR) IDB PID#: AC3282
SETTING CLASSIFICATION: Concrete foundation OPUS PID:
LATITUDE: 25° 56.4' N ( 25.94000) LONGITUDE: 80° 7.3' W ( -80.12170)
The bench mark is a disk set flush in the NE corner of a concrete foundation for
a traffic control box, 9.54 m (31.3 ft) south of the centerline of 178th Street,
5.58 m (18.3 ft) west of the west edge of State Highway A1A, and 2.04 m (6.7 ft)
NW of the NW corner of a square concrete traffic light power pole, and 0.15 m
(0.5 ft) above the sidewalk.
BENCH MARK STAMPING: 3044 H 1982 BSM
DESIGNATION: 872 3044 H TIDAL FLDNR
MONUMENTATION: Tidal Station disk VM#: 5751
AGENCY: Florida Department of Natural Resources
(FLDNR) IDB PID#: AC3283
SETTING CLASSIFICATION: Concrete box drain OPUS PID:
LATITUDE: 25° 56.5' N ( 25.94170) LONGITUDE: 80° 7.5' W ( -80.12500)
The bench mark is a disk set flush in the corner of a 1 m x 1 m (4 ft x 3 ft)
concrete box drain, 16.00 m (52.5 ft) ESE of bench mark 3044 F 1982 BSM, 8.90 m
(29.2 ft) east of the centerline of the north/south road, 7.77 m (25.5 ft) south
of the centerline of 180th Drive, and 6.80 m (22.3 ft) NW of the NW edge of a
sidewalk where it makes a right angle turn.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 7
Station ID: 8723044 PUBLICATION DATE: 02/13/2004
Name: DUMFOUNDLING BAY
FL
NOAA Chart: 11466 Latitude: 25° 56.5' N ( 25.94170)
USGS Quad: NORTH MIAMI Longitude: 80° 7.5' W ( -80.12500)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: NO 1 1973
DESIGNATION: 872 3044 TIDAL 1
MONUMENTATION: Tidal Station disk VM#: 17085
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete sea wall OPUS PID:
LATITUDE: 25° 56.5' N ( 25.94170) LONGITUDE: 80° 7.5' W ( -80.12500)
The bench mark is a disk set flush in the concrete north-south sea wall located
on the east side of Dumfoundling Bay behind and across the street from the
Carribean Breeze Condominiums, 53 m (175 ft) west of the center of the
North-South Street on the west side of the Carribean Breeze Condominums, and 50
m (165 ft) north of a shear break in the sea wall.
BENCH MARK STAMPING: NO 2 1973
DESIGNATION: 872 3044 TIDAL 2
MONUMENTATION: Tidal Station disk VM#: 17086
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete sea wall OPUS PID:
LATITUDE: 25° 56.5' N ( 25.94170) LONGITUDE: 80° 7.5' W ( -80.12500)
The bench mark is a disk set flush in the concrete sea wall located on the west
side of the Carribean Breeze Condominiums, 34 m (113 ft) south of bench mark NO
3 1973, 27 m (90 ft) north of bench mark NO 1 1973, and 1 m (3 ft) south of the
tide gage site.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 7
Station ID: 8723044 PUBLICATION DATE: 02/13/2004
Name: DUMFOUNDLING BAY
FL
NOAA Chart: 11466 Latitude: 25° 56.5' N ( 25.94170)
USGS Quad: NORTH MIAMI Longitude: 80° 7.5' W ( -80.12500)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: NO 4 1973
DESIGNATION: 872 3044 TIDAL 4
MONUMENTATION: Tidal Station disk VM#: 17087
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete sea wall OPUS PID:
LATITUDE: 25° 56.5' N ( 25.94170) LONGITUDE: 80° 7.5' W ( -80.12500)
The bench mark is a disk set flush in the concrete sea wall located NW of the
Carribean Breeze Condominiums, NW of the northern most two grouping of pine
trees, 38 m (125 ft) south of bench mark NO 5 1973, and 37 m (120 ft) north of
bench mark NO 3 1973.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 7
Station ID: 8723044 PUBLICATION DATE: 02/13/2004
Name: DUMFOUNDLING BAY
FL
NOAA Chart: 11466 Latitude: 25° 56.5' N ( 25.94170)
USGS Quad: NORTH MIAMI Longitude: 80° 7.5' W ( -80.12500)
T I D A L D A T U M S
Tidal datums at DUMFOUNDLING BAY based on:
LENGTH OF SERIES: 1 MONTH
TIME PERIOD: August 1973 - August 1973
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION: 8723170 MIAMI BEACH (CITY PIER)
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
MEAN HIGHER HIGH WATER MHHW = 0.680
MEAN HIGH WATER MHW = 0.659
North American Vertical Datum NAVD88 = 0.576
MEAN TIDE LEVEL MTL = 0.351
MEAN SEA LEVEL MSL = 0.349
MEAN LOW WATER MLW = 0.043
MEAN LOWER LOW WATER MLLW = 0.000
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
NO 3 1973 1.332 0.673
NO 5 1973 1.362 0.703
3044 F 1982 BSM 1.067 0.408
3044 G 1982 BSM 1.970 1.311
3044 H 1982 BSM 1.052 0.393
NO 1 1973 1.287 0.628
NO 2 1973 1.321 0.662
NO 4 1973 1.356 0.697
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 7 of 7
Station ID: 8723044 PUBLICATION DATE: 02/13/2004
Name: DUMFOUNDLING BAY
FL
NOAA Chart: 11466 Latitude: 25° 56.5' N ( 25.94170)
USGS Quad: NORTH MIAMI Longitude: 80° 7.5' W ( -80.12500)
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.