U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 7
PUBLICATION DATE: 11/05/1984
Station ID: 8723170 SUPERCEDED DATE: 04/21/2003
Name: MIAMI BEACH, ATLANTIC OCEAN
FLORIDA
NOAA Chart: 11468 Latitude: 25° 46.2' N
USGS Quad: MIAMI Longitude: 80° 7.9' W
To reach the tidal bench marks from the intersection of Washington Avenue and
Biscayne Street at the south side of Miami Beach, proceed east along Biscayne
Street to the end the street and the beginning of the concrete municipal pier.
The bench marks are around the pier area and southerly along Government Cut. The
gage and staff were on the pier.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: BM NO 6
MONUMENTATION: Survey Disk VM#: 5785
AGENCY: PID#: AC2231
SETTING CLASSIFICATION: Shallow Set Pipe
The bench mark is at Government Cut, 0.05 mile (0.08 km) south of the south end
of Collins Avenue, 190.2 feet (58.0 m) east of the road to Government Cut, 72
feet (22 m) ESE of the SE corner of a wood frame building and set in the center
of the road paralleling Government Cut, beneath a rectangular iron cover.
BENCH MARK STAMPING: NO 4 1928
MONUMENTATION: Survey Disk VM#: 5773
AGENCY: PID#: AC2247
SETTING CLASSIFICATION: Concrete Base
The bench mark is set in the top of the north corner of a concrete base
supporting a witness post near the City of Miami Beach warehouse, 21.5 feet (6.6
m) SW of the SW curb of Alton Road, 9 feet (3 m) NW of the NW corner of the
warehouse, 1 foot (0.3 m) north of a witness post, and 0.3 foot (0.1 m) below
ground level.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 7
PUBLICATION DATE: 11/05/1984
Station ID: 8723170 SUPERCEDED DATE: 04/21/2003
Name: MIAMI BEACH, ATLANTIC OCEAN
FLORIDA
NOAA Chart: 11468 Latitude: 25° 46.2' N
USGS Quad: MIAMI Longitude: 80° 7.9' W
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 7 1937
MONUMENTATION: Survey Disk VM#: 5774
AGENCY: PID#: AC2244
SETTING CLASSIFICATION: Concrete Base
The bench mark is set in the NW side of the concrete base of the east post of
the entrance gate of the road leading to the U.S. Army Corps of Engineers office
building, 300 feet (91 m) south of the intersection of Washington Avenue and
Biscayne Street, 8 feet (2 m) east of the extended centerline of Washington
Avenue, and 0.5 foot (0.2 m) above the ground.
BENCH MARK STAMPING: 9 1955
MONUMENTATION: Survey Disk VM#: 5775
AGENCY: PID#: AC2240
SETTING CLASSIFICATION: Concrete Pier
The bench mark is set flush in the concrete pier deck, at the east end of
Biscayne Street, 366 feet (112 m) east of the west end of the municipal pier, 39
feet (12 m) NW of the NE corner of the womens restroom, and 0.5 foot (0.2 m)
south of the south face of the north guardrail of the pier.
BENCH MARK STAMPING: NO 10 1956
MONUMENTATION: Survey Disk VM#: 5776
AGENCY: PID#: AC2246
SETTING CLASSIFICATION: Concrete Footing
The bnech mark is set in top of the NW corner of the concrete base to light pole
#166D6, at the west end of Biscayne Street near the NW corner of the South Shore
Recreation Park, 204 feet (62 m) west of the intersection of Biscayne Street and
Alton Road, 62 feet (19 m) east of the west edge of the bulkhead on the water
front, 9.5 feet (2.9 m) NE of the east edge of the north entrance to the
recreation building, and at ground level.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 7
PUBLICATION DATE: 11/05/1984
Station ID: 8723170 SUPERCEDED DATE: 04/21/2003
Name: MIAMI BEACH, ATLANTIC OCEAN
FLORIDA
NOAA Chart: 11468 Latitude: 25° 46.2' N
USGS Quad: MIAMI Longitude: 80° 7.9' W
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: MH 17 1963
MONUMENTATION: Survey Disk VM#: 5777
AGENCY: PID#: AC2238
SETTING CLASSIFICATION: Concrete Foundation
The bench mark is set in the NE concrete foundation of the Corps of Engineers
Boathouse (Building No.5) on the north bank of Government Cut, 39.6 feet (12.1
m) SE of the south corner of warehouse building No.25, and 22.5 feet (6.9 m)
west of the NW corner of building No.7.
BENCH MARK STAMPING: DINO NO 1 1967 1971
MONUMENTATION: Survey Disk VM#: 5778
AGENCY: PID#: AC3190
SETTING CLASSIFICATION: Concrete Monument
The bench mark is set in the top of a concrete monument, in the center of a
circular drive near the SE corner of the U.S. Army Corps of Engineers property,
59.0 feet (18.0 m) west of a north-south chain link fence along the property
boundary, and at ground level.
BENCH MARK STAMPING: MB 20 1973
MONUMENTATION: Survey Disk VM#: 5779
AGENCY: PID#: AC3183
SETTING CLASSIFICATION: Concrete Pier
The bench mark is set flush in the concrete near the 90 degree bend of the
municipal pier, 29 feet (9 m) SSE of Bench Mark 9 1955, and 1 foot (0.3 m) north
of the south face of the pier.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 7
PUBLICATION DATE: 11/05/1984
Station ID: 8723170 SUPERCEDED DATE: 04/21/2003
Name: MIAMI BEACH, ATLANTIC OCEAN
FLORIDA
NOAA Chart: 11468 Latitude: 25° 46.2' N
USGS Quad: MIAMI Longitude: 80° 7.9' W
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: NO 3 1974
MONUMENTATION: Survey Disk VM#: 5780
AGENCY: PID#: AC3184
SETTING CLASSIFICATION: Concrete Pier
The bench mark is set flush in concrete at the south and outer end of the
municipal pier, and SE of Bench Mark 9 1955.
BENCH MARK STAMPING: DADE CO. R73-1974
MONUMENTATION: Survey Disk VM#: 5781
AGENCY: PID:
SETTING CLASSIFICATION: Sidewalk
The bench mark is set flush in the sidewalk, 332 feet (101 m) NE of Bench Mark
NO 3 1975, 224 feet (68 m) east of the centerline of Ocean Drive, and 11.9 feet
(3.6 m) SE of the SW corner of the restroom building.
BENCH MARK STAMPING: NO 1 1975
MONUMENTATION: Survey Disk VM#: 5782
AGENCY: PID#: AC3186
SETTING CLASSIFICATION: Concrete Pier
The bench mark is set flush in concrete at the NW corner of the west end of the
municipal Pier at the east end of Biscayne Street, 77 feet (23 m) ENE of Bench
Mark NO 2 1975, 18.2 feet (5.6 m) west of the first light pole on the north side
of the pier from the west end, 18.1 feet (5.6 m) north of the north side of the
walk to the pier, and 1.0 foot (0.3 m) south of the north face of the pier.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 7
PUBLICATION DATE: 11/05/1984
Station ID: 8723170 SUPERCEDED DATE: 04/21/2003
Name: MIAMI BEACH, ATLANTIC OCEAN
FLORIDA
NOAA Chart: 11468 Latitude: 25° 46.2' N
USGS Quad: MIAMI Longitude: 80° 7.9' W
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: NO 2 1975
MONUMENTATION: Survey Disk VM#: 5783
AGENCY: PID#: AC3187
SETTING CLASSIFICATION: Concrete Pier
The bench mark is set flush in the concrete floor of the covered seating area at
the west end of the municipal pier at the east end of Biscayne Street, 43.4 feet
(13.2 m) SW of the NE corner of the covered area, 16.7 feet (5.1 m) north of the
SW corner of the covered area.
BENCH MARK STAMPING: NO 3 1975
MONUMENTATION: Survey Disk VM#: 5784
AGENCY: PID#: AC3189
SETTING CLASSIFICATION: Concrete Sidewalk
The bench mark is set flush in the sidewalk at the NE corner of the intersection
of Biscayne Street and Ocean Drive, 230 feet (70 m) west of Bench Mark NO 2
1975, 39 feet (12 m) south of a fire hydrant, 10.5 feet (3.2 m) NE of the
intersection corner curbing.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 7
PUBLICATION DATE: 11/05/1984
Station ID: 8723170 SUPERCEDED DATE: 04/21/2003
Name: MIAMI BEACH, ATLANTIC OCEAN
FLORIDA
NOAA Chart: 11468 Latitude: 25° 46.2' N
USGS Quad: MIAMI Longitude: 80° 7.9' W
T I D A L D A T U M S
Tidal datums at MIAMI BEACH, ATLANTIC OCEAN based on:
LENGTH OF SERIES: 19 YEARS
TIME PERIOD: 1960-1978
TIDAL EPOCH: 1960-1978
CONTROL TIDE STATION:
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in FEET:
HIGHEST OBSERVED WATER LEVEL (09/08/1965) = 6.40
MEAN HIGHER HIGH WATER MHHW = 2.76
MEAN HIGH WATER MHW = 2.67
MEAN TIDE LEVEL MTL = 1.42
* NATIONAL GEODETIC VERTICAL DATUM NGVD29 = 1.00
MEAN LOW WATER MLW = 0.16
MEAN LOWER LOW WATER MLLW = 0.00
LOWEST OBSERVED WATER LEVEL (03/24/1936) = -1.60
* NGVD reference based on adjustment of 1970 and NOS levels of 1982.
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In FEET above:
Stamping or Designation MLLW MHW
BM NO 6 7.18 4.51
NO 4 1928 5.64 2.97
7 1937 5.05 2.38
9 1955 11.35 8.68
NO 10 1956 5.26 2.59
MH 17 1963 5.70 3.03
DINO NO 1 1967 1971 9.09 6.42
MB 20 1973 11.40 8.73
NO 3 1974 11.37 8.70
DADE CO. R73-1974 8.47 5.80
NO 1 1975 11.27 8.60
NO 2 1975 9.50 6.83
NO 3 1975 8.93 6.26
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 7 of 7
PUBLICATION DATE: 11/05/1984
Station ID: 8723170 SUPERCEDED DATE: 04/21/2003
Name: MIAMI BEACH, ATLANTIC OCEAN
FLORIDA
NOAA Chart: 11468 Latitude: 25° 46.2' N
USGS Quad: MIAMI Longitude: 80° 7.9' W
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 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.