U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 5
Station ID: 8721808 PUBLICATION DATE: 05/14/2007
Name: EAU GALLIE, INDIAN RIVER
FL
NOAA Chart: 11476 Latitude: 28° 8.0' N ( 28.13330)
USGS Quad: EAU GALLIE Longitude: 80° 37.5' W ( -80.62500)
To reach the tidal bench marks from the intersection of U.S. Highway 1 (State
Road 5) and State Road 518 (Eau Gallie Blvd.), go east on Eau Gallie Blvd. for
0.5 km (0.3 mi) to Pineapple Avenue, turn left, go north on Pineapple Avenue for
0.16 km (0.1 mi) to a parking lot on the right, south of the Eau Gallie Library,
turn right and go east in the parking lot for 0.08 km (0.05 mi). The bench
marks are located on the left. The tide gage and staff were located on the T of
the municipal wharf.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: COLLEGE 2 1906 1930 1934
DESIGNATION: COLLEGE 2 RESET
MONUMENTATION: Triangulation Station disk VM#: 5375
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: AK2899
SETTING CLASSIFICATION: Clay tile pipe OPUS PID:
LATITUDE: 28° 7.9' N ( 28.13170) LONGITUDE: 80° 37.5' W ( -80.62500)
The primary bench mark is a disk set in a 12-inch clay tile pipe filled with
concrete and is 0.8 m (2.5 ft) below the surface of the ground inside of a
24-inch concrete pipe (rocks and sand have been filled around the concrete pipe
and mark to keep the bank from eroding away), south of the Eau Gallie Library,
0.8 km (0.05 mi) after entrance into a parking lot, and 6.2 m (20.3 ft) ENE of
the NE edge of a concrete sidewalk. Carsonite witness post is 0.3 m (1 ft) NE
of station mark inside of the 24-inch concrete pipe.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 5
Station ID: 8721808 PUBLICATION DATE: 05/14/2007
Name: EAU GALLIE, INDIAN RIVER
FL
NOAA Chart: 11476 Latitude: 28° 8.0' N ( 28.13330)
USGS Quad: EAU GALLIE Longitude: 80° 37.5' W ( -80.62500)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: COLLEGE 2 NO 5 1906 1935
DESIGNATION: COLLEGE 2 RM 5
MONUMENTATION: Reference Mark disk VM#: 5377
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: AK2904
SETTING CLASSIFICATION: Concrete wharf wing wall OPUS PID:
LATITUDE: 28° 7.9' N ( 28.13170) LONGITUDE: 80° 37.5' W ( -80.62500)
The bench mark is a disk set flush in the NW end of the north concrete wharf
wing wall, 6 m (20 ft) north of the municipal wharf driveway, and 1 m (3 ft) SE
of the NW end of the wingwall.
BENCH MARK STAMPING: NO 1 1969
DESIGNATION: 872 1808 TIDAL 1
MONUMENTATION: Tidal Station disk VM#: 5378
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: AK2907
SETTING CLASSIFICATION: Concrete wharf wing wall OPUS PID#: AK2907
LATITUDE: 28° 7.9' N ( 28.13170) LONGITUDE: 80° 37.5' W ( -80.62500)
The bench mark is a disk set flush in the west end of the south concrete wharf
wingwall, 3 m (9 ft) south of the extended centerline of the municipal wharf
driveway, 0.61 m (2.0 ft) east of the west end of the wingwall, and in the
center of the wingwall.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 5
Station ID: 8721808 PUBLICATION DATE: 05/14/2007
Name: EAU GALLIE, INDIAN RIVER
FL
NOAA Chart: 11476 Latitude: 28° 8.0' N ( 28.13330)
USGS Quad: EAU GALLIE Longitude: 80° 37.5' W ( -80.62500)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: NO 2 1969
DESIGNATION: 872 1808 TIDAL 2
MONUMENTATION: Tidal Station disk VM#: 5379
AGENCY: US Coast and Geodetic Survey
(USC&GS) IDB PID#: AK2905
SETTING CLASSIFICATION: Concrete pad OPUS PID:
LATITUDE: 28° 7.9' N ( 28.13170) LONGITUDE: 80° 37.6' W ( -80.62670)
The bench mark is a disk set flush in the NW corner of the concrete entrance to
the librarys childrens room, 37 m (120 ft) east of the centerline of Pineapple
Street, 15 m (48 ft) north of the centerline of the municipal wharf driveway,
and 1 m (4 ft) west of the door.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 5
Station ID: 8721808 PUBLICATION DATE: 05/14/2007
Name: EAU GALLIE, INDIAN RIVER
FL
NOAA Chart: 11476 Latitude: 28° 8.0' N ( 28.13330)
USGS Quad: EAU GALLIE Longitude: 80° 37.5' W ( -80.62500)
T I D A L D A T U M S
Tidal datums at EAU GALLIE, INDIAN RIVER based on:
LENGTH OF SERIES: 10 MONTHS
TIME PERIOD: January 1970 - October 1970
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION: 8723170 MIAMI BEACH (CITY PIER)
Elevations of tidal datums referred to Mean Sea Level (MSL), in METERS:
North American Vertical Datum NAVD88 = 0.300
MEAN SEA LEVEL MSL = 0.000
North American Vertical Datum (NAVD88)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MSL
COLLEGE 2 1906 1930 1934 0.709
COLLEGE 2 NO 5 1906 1935 1.013
NO 1 1969 1.021
NO 2 1969 2.376
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 5
Station ID: 8721808 PUBLICATION DATE: 05/14/2007
Name: EAU GALLIE, INDIAN RIVER
FL
NOAA Chart: 11476 Latitude: 28° 8.0' N ( 28.13330)
USGS Quad: EAU GALLIE Longitude: 80° 37.5' W ( -80.62500)
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.