U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 4
PUBLICATION DATE: 09/24/1985
Station ID: 8721611 SUPERCEDED DATE: 04/21/2003
Name: SYKES CREEK
FLORIDA
NOAA Chart: 11476 Latitude: 28° 24.3' N
USGS Quad: COURTENAY Longitude: 80° 41.8' W
To reach the tidal bench marks from Courtenay on Merritt Island, proceed south
on State Highway 3 to its intersection with State Highway 528, then proceed east
on State Highway 528 to the bridge over Sykes Creek. The bench marks are
located at the bridge. The tide gage and staff were located on a wooden
platform attached to a concrete support under the bridge.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: M 210 1963
MONUMENTATION: Survey Disk VM#: 5352
AGENCY: PID#: AK2177
SETTING CLASSIFICATION: Concrete Curb
The bench mark is set on the roadside curbing on the NW corner of the westbound
traffic bridge of State Highways A1A and 528, 15.3 feet (4.7 m) north of the
centerline of the highway, 8.5 feet (2.6 m) east of the beginning of the bridge
curbing, and 1.0 foot (0.3 m) south of the bridge railing abutment.
BENCH MARK STAMPING: FLORIDA SRD BM (SRD 2)
MONUMENTATION: Survey Disk VM#: 5353
AGENCY: PID:
SETTING CLASSIFICATION: Bridge Abutment
The bench mark is set on the bridge railing abutment on the NE corner of the
eastbound traffic bridge of State Highways A1A and 528, 15.3 feet (4.7 m) north
of the centerline of the highway, 7.0 feet (2.1 m) west of the beginning of the
bridge railing abutment, and 1.0 foot (0.3 m) east of the beginning of the
bridge railing. The bench mark is 3.0 feet (0.9 m) above road level. (Note:
Historically referred to as SRD 2)
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 4
PUBLICATION DATE: 09/24/1985
Station ID: 8721611 SUPERCEDED DATE: 04/21/2003
Name: SYKES CREEK
FLORIDA
NOAA Chart: 11476 Latitude: 28° 24.3' N
USGS Quad: COURTENAY Longitude: 80° 41.8' W
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: FLORIDA SRD BM (SRD 3)
MONUMENTATION: Survey Disk VM#: 5354
AGENCY: PID:
SETTING CLASSIFICATION: Bridge Abutment
The bench mark is set on the bridge railing abutment on the SW corner of the
eastbound traffic bridge of State Highways A1A and 528, 17.3 feet (5.3 m) south
of the centerline of the highway, 7.0 feet (2.1 m) east of the beginning of the
bridge railing abutment, and 1.0 foot (0.3 m) west of the beginning of the
bridge railing. The bench mark is 3.0 feet (0.9 m) above road level. (Note:
Historically referred to as SRD 3)
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 4
PUBLICATION DATE: 09/24/1985
Station ID: 8721611 SUPERCEDED DATE: 04/21/2003
Name: SYKES CREEK
FLORIDA
NOAA Chart: 11476 Latitude: 28° 24.3' N
USGS Quad: COURTENAY Longitude: 80° 41.8' W
T I D A L D A T U M S
Tidal datums at SYKES CREEK based on:
LENGTH OF SERIES: 27 DAYS
TIME PERIOD: MARCH 14-APRIL 9, 1980
TIDAL EPOCH: 1960-1978
CONTROL TIDE STATION: 8721456 TITUSVILLE
Elevations of tidal datums referred to Mean Water Level (MWL), in FEET:
HIGHEST OBSERVED WATER LEVEL (04/03/1980) = 0.15
MEAN LOW WATER MLW = 0.00
LOWEST OBSERVED WATER LEVEL (03/23/1980) = -0.47
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In FEET above:
Stamping or Designation MWL
M 210 1963 19.56
FLORIDA SRD BM (SRD 2) 22.37
FLORIDA SRD BM (SRD 3) 21.71
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 4
PUBLICATION DATE: 09/24/1985
Station ID: 8721611 SUPERCEDED DATE: 04/21/2003
Name: SYKES CREEK
FLORIDA
NOAA Chart: 11476 Latitude: 28° 24.3' N
USGS Quad: COURTENAY Longitude: 80° 41.8' 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.