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Bench Mark Sheet for 8722029, SEBASTIAN, INDIAN RIVER FL

Superseded Epoch

Large map location marker Station Location
Small red map location marker Published bench mark
Small blue map location marker Unpublished bench mark

Bench mark positions only appear on the map if their coordinates in the CO-OPS database are at the precision of degrees/minutes/seconds/and tenths of seconds. If the coordinates are less precise, the mark will not appear.

Printable version

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
Datums Page                                                        Page  1 of  6

                                                                                
Station ID: 8722029                         PUBLICATION DATE:  02/14/2011
Name:       SEBASTIAN, INDIAN RIVER                           
            FL
NOAA Chart: 11476                           Latitude:   27° 48.7' N (  27.81170)
USGS Quad:  SEBASTIAN                       Longitude:  80° 27.8' W ( -80.46330)


To reach the tidal bench marks from Ace Hardware Store on Cleveland Street and
U.S. Highway 1 in Sebastian, proceed 1 block east on Cleveland Street, then
south on Indian River Drive to the Sebastian Yacht Club.  The bench marks are
located in the vicinity of the hardware store and the yacht club.  The tide gage
and staff were located on the yacht club dock.


                         T I D A L   B E N C H   M A R K S


                 PRIMARY BENCH MARK STAMPING:  NO 1 1969
                         DESIGNATION:          872 2029 TIDAL 1

MONUMENTATION:           Tidal Station disk                    VM#:         5400
AGENCY:                  US Coast and Geodetic Survey
                         (USC&GS)                              IDB PID#:  AF3497
SETTING CLASSIFICATION:  Seawall                               OPUS PID#: AF3497
LATITUDE:   27° 48.7' N (  27.81083)          LONGITUDE:  80° 27.9' W ( -80.46444)


The primary bench mark is a disk set in the NE corner of the south wingwall of
the boat launch ramp of the Sebastian Yacht Club, 29 m (96 ft) SSE of the SE
corner of the yacht club building, 8.66 m (28.4 ft) east of the west end of the
bulkhead, 7.19 m (23.6 ft) north of the south corner, 0.30 m (1.0 ft) south of
the north face, and 0.21 m (0.7 ft) west of the east face of the south wingwall.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  2 of  6

                                                                                
Station ID: 8722029                         PUBLICATION DATE:  02/14/2011
Name:       SEBASTIAN, INDIAN RIVER                           
            FL
NOAA Chart: 11476                           Latitude:   27° 48.7' N (  27.81170)
USGS Quad:  SEBASTIAN                       Longitude:  80° 27.8' W ( -80.46330)


                         T I D A L   B E N C H   M A R K S


                         BENCH MARK STAMPING:  NO 2 1969
                         DESIGNATION:          872 2029 TIDAL 2

MONUMENTATION:           Tidal Station disk                    VM#:         5401
AGENCY:                  US Coast and Geodetic Survey
                         (USC&GS)                              IDB PID#:  AF3498
SETTING CLASSIFICATION:  Retaining wall                        OPUS PID:        
LATITUDE:   27° 48.7' N (  27.81083)          LONGITUDE:  80° 27.9' W ( -80.46528)


The bench mark is a disk set flush in the concrete retaining wall at the NW
corner of the property, 12.50 m (41.0 ft) east of the centerline of Indian River
Drive, 3.93 m (12.9 ft) east of the east edge of a 2.44 m (8.0 ft) concrete
sidewalk, 2.10 m (6.9 ft) north of a 2-inch emergency shut off water valve
projecting 0.79 m (2.6 ft) above the level of the ground, 1.74 m (5.7 ft) SE of
an electric meter box, 1.65 m (5.4 ft) ENE of a wooden light pole, and 0.30 m
(1.0 ft) east of the west end of the concrete seawall.



                         BENCH MARK STAMPING:  NO 3 1969
                         DESIGNATION:          872 2029 TIDAL 3

MONUMENTATION:           Tidal Station disk                    VM#:         5402
AGENCY:                  US Coast and Geodetic Survey
                         (USC&GS)                              IDB PID#:  AF3502
SETTING CLASSIFICATION:  Sidewalk                              OPUS PID:        
LATITUDE:   27° 48.6' N (  27.81028)          LONGITUDE:  80° 28.0' W ( -80.46611)


The bench mark is a disk set flush in the top of the concrete sidewalk near the
NW corner of the Ace Hardware building and 0.91 m (3.0 ft) above the level of
Cleveland Street, 15.24 m (50.0 ft) south of the south curb of Cleveland Street,
1.77 m (5.8 ft) west of the NW corner of the Ace Hardware building, 0.85 m (2.8
ft) north of a flagpole, and 0.40 m (1.3 ft) NE of the SW corner of the concrete
sidewalk.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  3 of  6

                                                                                
Station ID: 8722029                         PUBLICATION DATE:  02/14/2011
Name:       SEBASTIAN, INDIAN RIVER                           
            FL
NOAA Chart: 11476                           Latitude:   27° 48.7' N (  27.81170)
USGS Quad:  SEBASTIAN                       Longitude:  80° 27.8' W ( -80.46330)


                         T I D A L   B E N C H   M A R K S


                         BENCH MARK STAMPING:  NO 5 1969
                         DESIGNATION:          872 2029 TIDAL 5

MONUMENTATION:           Tidal Station disk                    VM#:         5404
AGENCY:                  US Coast and Geodetic Survey
                         (USC&GS)                              IDB PID#:  AF3495
SETTING CLASSIFICATION:  Seawall                               OPUS PID#: AF3495
LATITUDE:   27° 48.6' N (  27.81056)          LONGITUDE:  80° 27.9' W ( -80.46500)


The bench mark is a disk set flush in the top of the west end of the concrete
seawall 12.19 m (40.0 ft) east of the centerline of Indian River Drive, 7.50 m
(24.6 ft) north of a wooden power pole with transformer and four guy wires, 3.93
m (12.9 ft) NE of the east edge of a 1.83 m (6.0 ft) concrete sidewalk, 2.68 m
(8.8 ft) west of a wooden power pole with three guy wires, 1.31 m (4.3 ft) north
of the NE corner of a square concrete base of a sewer cap, and 0.30 m (1.0 ft)
east of the west end of the concrete seawall.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  4 of  6

                                                                                
Station ID: 8722029                         PUBLICATION DATE:  02/14/2011
Name:       SEBASTIAN, INDIAN RIVER                           
            FL
NOAA Chart: 11476                           Latitude:   27° 48.7' N (  27.81170)
USGS Quad:  SEBASTIAN                       Longitude:  80° 27.8' W ( -80.46330)


                         T I D A L   B E N C H   M A R K S


                         BENCH MARK STAMPING:  P 401 1991
                         DESIGNATION:          P 401

MONUMENTATION:           Flange-encased Rod                    VM#:        19491
AGENCY:                  National Geodetic Survey (NGS)        IDB PID#:  AF7497
SETTING CLASSIFICATION:  Stainless steel rod                   OPUS PID:        
LATITUDE:   27° 47.9' N (  27.79806)          LONGITUDE:  80° 27.6' W ( -80.46028)


The bench mark is a disk 41.09 m (134.8 ft) east of the centerline of the
northbound lanes of the highway, 8.81 m (28.9 ft) west of the centerline of
Indian River Drive south, 0.61 m (2.0 ft) south of a utility pole, 0.30 m (1.0
ft) east of a witness post, and 0.30 m (1.0 ft) below the level of the highway. 
Note: Access to the datum point is through a 5-inch logo cap.  

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  5 of  6

                                                                                
Station ID: 8722029                         PUBLICATION DATE:  02/14/2011
Name:       SEBASTIAN, INDIAN RIVER                           
            FL
NOAA Chart: 11476                           Latitude:   27° 48.7' N (  27.81170)
USGS Quad:  SEBASTIAN                       Longitude:  80° 27.8' W ( -80.46330)


                            T I D A L   D A T U M S 


Tidal datums at SEBASTIAN, INDIAN RIVER based on:

     LENGTH OF SERIES:      2 years
     TIME PERIOD:           8/1/69-7/31/70 & 9/1/72-8/31/73
     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:

     HIGHEST OBSERVED WATER LEVEL (10/19/1973)         =  0.701
     North American Vertical Datum              NAVD88 =  0.342
     MEAN HIGHER HIGH WATER                     MHHW   =  0.136
     MEAN HIGH WATER                            MHW    =  0.114
     MEAN SEA LEVEL                             MSL    =  0.068
     MEAN TIDE LEVEL                            MTL    =  0.068
     MEAN LOW WATER                             MLW    =  0.021
     MEAN LOWER LOW WATER                       MLLW   =  0.000
     LOWEST  OBSERVED WATER LEVEL (03/05/1970)         = -0.384

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     NO 1 1969                                   1.487    1.373
     NO 2 1969                                   1.501    1.387
     NO 3 1969                                   3.009    2.895
     NO 5 1969                                   1.463    1.349
     P 401 1991                                  2.024    1.910


Foot Notes:

Bench mark P 401 1991 is based on one differential leveling connection and does
not meet the quality control standards of the NOS.  Therefore, caution should be
used when deriving elevations for this mark.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  6 of  6

                                                                                
Station ID: 8722029                         PUBLICATION DATE:  02/14/2011
Name:       SEBASTIAN, INDIAN RIVER                           
            FL
NOAA Chart: 11476                           Latitude:   27° 48.7' N (  27.81170)
USGS Quad:  SEBASTIAN                       Longitude:  80° 27.8' W ( -80.46330)


                             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.

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Products available at 8722029 SEBASTIAN, INDIAN RIVER, FL

Revised: 08/08/2018
NOAA / National Ocean Service
Web site owner: Center for Operational Oceanographic Products and Services