U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 5
PUBLICATION DATE: 07/22/1989
Station ID: 8720291 SUPERCEDED DATE: 04/21/2003
Name: JACKSONVILLE BEACH
FLORIDA
NOAA Chart: 11490 Latitude: 30° 17.0' N
USGS Quad: JACKSONVILLE BEACH Longitude: 81° 23.2' W
To reach the tidal bench marks from the intersection of Beach Boulevard and U.S.
Highway A1A, proceed south on U.S. Highway A1A (3rd Street) for 0.4 mile (0.6
km) to 6th Avenue South, then east on 6th Avenue South to its end at the
Jacksonville Beach Fishing Pier. The bench marks are along the sea wall north
of the pier, along U.S. Highway A1A, and along Beach Boulevard east of Highway
A1A. The tide gage and staff were on the west end of the pier.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: NO 1 1973
MONUMENTATION: Survey Disk VM#: 5163
AGENCY: PID#: BC1556
SETTING CLASSIFICATION: Concrete Sea Wall
The bench mark is set in a concrete sea wall, 99.1 feet (30.2 m) south of Bench
Mark NO 2 1973, 63.5 feet (19.4 m) north of the Jacksonville Beach Fishing Pier,
and 1.0 foot (0.3 m) west of the east edge of the sea wall.
BENCH MARK STAMPING: C-30 RESET 1963
MONUMENTATION: Survey Disk VM#: 5159
AGENCY: PID#: BC0501
SETTING CLASSIFICATION: Concrete Step
The bench mark is in the north end of the bottom step of the east entrance to
the City Hall building at the NE corner of the intersection of U.S. Highway A1A
and Beach Boulevard, 25.4 feet (7.7 m) NE of the east entrance to City Hall, 0.8
foot (0.2 m) south of the north end of the step, and 0.3 foot (0.1 m) above
ground.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 5
PUBLICATION DATE: 07/22/1989
Station ID: 8720291 SUPERCEDED DATE: 04/21/2003
Name: JACKSONVILLE BEACH
FLORIDA
NOAA Chart: 11490 Latitude: 30° 17.0' N
USGS Quad: JACKSONVILLE BEACH Longitude: 81° 23.2' W
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: U 323 1970
MONUMENTATION: Survey Disk VM#: 5160
AGENCY: PID#: BC0503
SETTING CLASSIFICATION: Concrete Monument
The bench mark is set in a concrete monument on the property of a high rise
apartment building at the NE corner of the intersection of U.S. Highway A1A and
2nd Avenue South, 36 feet (11 m) north of the centerline of 2nd Avenue South,
31.5 feet (9.6 m) east of the centerline of northbound U.S. Highway A1A, 1.8
feet (0.5 m) west of a witness post, and 0.5 foot (0.2 m) above ground.
BENCH MARK STAMPING: X 323 1970
MONUMENTATION: Survey Disk VM#: 5161
AGENCY: PID#: BC0505
SETTING CLASSIFICATION: Concrete Foundation
The bench mark is in the NE corner of a 4 x 4-foot (1 x 1 m) concrete catch
basin at the intersection of U.S. Highway A1A and 11th Avenue South, 47 feet (14
m) east of the centerline of northbound U.S. Highway A1A, 28.5 feet (8.7 m)
north of the centerline of 11th Avenue South, and level with the highway.
BENCH MARK STAMPING: Y 324 1970
MONUMENTATION: Survey Disk VM#: 5162
AGENCY: PID#: BC0502
SETTING CLASSIFICATION: Concrete Sea Wall
The bench mark is set in a concrete sea wall at the east end of the southern
side of Beach Boulevard, 28.5 feet (8.7 m) south of the centerline of Beach
Boulevard, 22.6 feet (6.9 m) north of the south steps leading to the beach, 2.1
feet (0.6 m) east of the east concrete support of a pedestrian overpass, and 5.3
feet (1.6 m) above the sidewalk.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 5
PUBLICATION DATE: 07/22/1989
Station ID: 8720291 SUPERCEDED DATE: 04/21/2003
Name: JACKSONVILLE BEACH
FLORIDA
NOAA Chart: 11490 Latitude: 30° 17.0' N
USGS Quad: JACKSONVILLE BEACH Longitude: 81° 23.2' W
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: NO 2 1973
MONUMENTATION: Survey Disk VM#: 5164
AGENCY: PID#: BC1555
SETTING CLASSIFICATION: Concrete Sea Wall
The bench mark is set in a concrete sea wall 162.6 feet (49.6 m) north of the
Jacksonville Beach Fishing Pier, 86.7 feet (26.4 m) south of the east end of
5th Avenue South, and 0.7 foot (0.2 m) west of the east edge of the sea wall.
BENCH MARK STAMPING: NO 3 1973
MONUMENTATION: Survey Disk VM#: 5165
AGENCY: PID#: BC1554
SETTING CLASSIFICATION: Concrete Sea Wall
The bench mark is set in a concrete sea wall north of the Jacksonville Beach
Fishing Pier, 69.6 feet (21.2 m) NE of the NE corner of the Greens Motel at 3rd
Avenue South and 1st Street South, 28.4 feet (8.7 m) east of the east end of 3rd
Avenue South, 9.0 feet (2.7 m) north of the steps leading to the beach from 3rd
Avenue South, and 1.2 feet (0.4 m) west of the east edge of the sea wall.
BENCH MARK STAMPING: DUVAL R-67 1974
MONUMENTATION: Survey Disk VM#: 5166
AGENCY: PID#: BC1553
SETTING CLASSIFICATION: Concrete Monument
The bench mark is set in a concrete monument at the east end of 1st Avenue
South, 34.6 feet (10.5 m) south of the centerline of 1st Avenue South, 10.5 feet
(3.2 m) west of the east edge of the concrete sea wall, and level with the
sidewalk.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 5
PUBLICATION DATE: 07/22/1989
Station ID: 8720291 SUPERCEDED DATE: 04/21/2003
Name: JACKSONVILLE BEACH
FLORIDA
NOAA Chart: 11490 Latitude: 30° 17.0' N
USGS Quad: JACKSONVILLE BEACH Longitude: 81° 23.2' W
T I D A L D A T U M S
Tidal datums at JACKSONVILLE BEACH based on:
LENGTH OF SERIES: 12 MONTHS
TIME PERIOD: MAY 1974 - APRIL 1975
TIDAL EPOCH: 1960-1978
CONTROL TIDE STATION: 8720030 FERNANDINA BEACH
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in FEET:
HIGHEST OBSERVED WATER LEVEL (04/03/1973) = 7.60
MEAN HIGHER HIGH WATER MHHW = 5.65
MEAN HIGH WATER MHW = 5.28
MEAN TIDE LEVEL MTL = 2.73
* NATIONAL GEODETIC VERTICAL DATUM NGVD29 = 2.30
MEAN LOW WATER MLW = 0.17
MEAN LOWER LOW WATER MLLW = 0.00
LOWEST OBSERVED WATER LEVEL (01/27/1975) = -2.20
* NGVD reference based on elevations published in Quad 300812, 1973, and NOS
leveling of 1976.
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In FEET above:
Stamping or Designation MLLW MHW
NO 1 1973 12.57 7.29
C-30 RESET 1963 13.31 8.03
U 323 1970 12.74 7.46
X 323 1970 15.22 9.94
Y 324 1970 13.97 8.69
NO 2 1973 12.74 7.46
NO 3 1973 13.82 8.54
DUVAL R-67 1974 14.06 8.78
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 5
PUBLICATION DATE: 07/22/1989
Station ID: 8720291 SUPERCEDED DATE: 04/21/2003
Name: JACKSONVILLE BEACH
FLORIDA
NOAA Chart: 11490 Latitude: 30° 17.0' N
USGS Quad: JACKSONVILLE BEACH Longitude: 81° 23.2' 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.