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Bench Mark Sheet for 8726906, RIVER VILLAGE, ANCLOTE 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Superseded Epoch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Small blue map location marker Unpublished bench mark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: 8726906                         PUBLICATION DATE:  01/06/2004
Name:       RIVER VILLAGE, ANCLOTE RIVER                      
            FL
NOAA Chart: 11412                           Latitude:   28°  9.4' N (  28.15670)
USGS Quad:  ELFERS                          Longitude:  82° 44.8' W ( -82.74670)


To reach the tidal bench marks at River Village from Tarpon Springs, proceed
north on US Highway 19 to the overpass of the S.C.L. Railroad.  The bench marks
are along the railroad and near the bridge over U.S. Highway 19.  The gage and
staff were NW of the intersection along the railroad tracks as they parallel
Seaboard Boulevard and curve to the north, and is just to the NW of the foot of
Seaboard Boulevard on a privately owned wood pier.


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


                 PRIMARY BENCH MARK STAMPING:  NO 2 1975
                         DESIGNATION:          872 6906 TIDAL 2

MONUMENTATION:           Tidal Station disk                    VM#:         7651
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  AL7392
SETTING CLASSIFICATION:  Concrete power pole foundation        OPUS PID:        
LATITUDE:   28°  9.4' N (  28.15670)          LONGITUDE:  82° 44.7' W ( -82.74500)


The primary bench mark is a disk set in the concrete foundation for the east of
two concrete poles for a high tension powerline, 0.3 km (0.2 mi) NW of the U.S.
Highway 19 railroad overpass, 28 m (91 ft) SE of the intersection of a dirt road
and the railroad tracks, 11.58 m (38.0 ft) south of the centerline of the dirt
road, and 0.30 m (1 ft) above ground level.

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

                                                                                
Station ID: 8726906                         PUBLICATION DATE:  01/06/2004
Name:       RIVER VILLAGE, ANCLOTE RIVER                      
            FL
NOAA Chart: 11412                           Latitude:   28°  9.4' N (  28.15670)
USGS Quad:  ELFERS                          Longitude:  82° 44.8' W ( -82.74670)


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


                         BENCH MARK STAMPING:  226
                         DESIGNATION:          226 FLHD
                         ALIAS:                UNSTAMPED 1 SRD (SE of S)

MONUMENTATION:           Survey disk                           VM#:         7653
AGENCY:                  Florida State Road Department (FLSRD) IDB PID#:  AL0060
SETTING CLASSIFICATION:  Concrete bridge wing wall             OPUS PID:        
LATITUDE:   28°  9.3' N (  28.15500)          LONGITUDE:  82° 44.4' W ( -82.74000)


The bench mark is a disk set in top of the concrete wing wall at the SE corner
of the U.S. Highway 19 southbound bridge over the Seaboard Coastline Railroad,
and 5.79 m (19.0 ft) east of the centerline of the southbound lane.  NOTE: The
bench mark is historically referred to as SRD (SE of S).

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

                                                                                
Station ID: 8726906                         PUBLICATION DATE:  01/06/2004
Name:       RIVER VILLAGE, ANCLOTE RIVER                      
            FL
NOAA Chart: 11412                           Latitude:   28°  9.4' N (  28.15670)
USGS Quad:  ELFERS                          Longitude:  82° 44.8' W ( -82.74670)


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


                         BENCH MARK STAMPING:  227
                         DESIGNATION:          227 FLHD
                         ALIAS:                UNSTAMPED 2 SRD (SE OF N)

MONUMENTATION:           Survey disk                           VM#:         7654
AGENCY:                  Florida State Road Department (FLSRD) IDB PID#:  AL0061
SETTING CLASSIFICATION:  Concrete bridge wing wall             OPUS PID:        
LATITUDE:   28°  9.3' N (  28.15500)          LONGITUDE:  82° 44.4' W ( -82.74000)


The bench mark is a disk set in top of the concrete wing wall at the SE corner
of the U.S. Highway 19 northbound bridge over the Seaboard Coastline Railroad,
5.79 m (19.0 ft) east of the centerline of the northbound lane.  NOTE: The bench
mark is historically referred to as SRD (SE of N).

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

                                                                                
Station ID: 8726906                         PUBLICATION DATE:  01/06/2004
Name:       RIVER VILLAGE, ANCLOTE RIVER                      
            FL
NOAA Chart: 11412                           Latitude:   28°  9.4' N (  28.15670)
USGS Quad:  ELFERS                          Longitude:  82° 44.8' W ( -82.74670)


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


                         BENCH MARK STAMPING:  225
                         DESIGNATION:          225 FLHD
                         ALIAS:                UNSTAMPED 3 SRD (NW OF S)

MONUMENTATION:           Survey disk                           VM#:         7655
AGENCY:                  Florida State Road Department (FLSRD) IDB PID#:  AL0059
SETTING CLASSIFICATION:  Concrete bridge wing wall             OPUS PID:        
LATITUDE:   28°  9.4' N (  28.15670)          LONGITUDE:  82° 44.4' W ( -82.74000)


The bench mark is a disk set in top of the concrete wing wall at the NW corner
of the U.S. Highway 19 southbound bridge over the Seaboard Coastline Railroad,
5.79 m (19.0 ft) west of the centerline of the southbound lane. NOTE: The bench
mark is historically referred to as SRD (NW of S).

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

                                                                                
Station ID: 8726906                         PUBLICATION DATE:  01/06/2004
Name:       RIVER VILLAGE, ANCLOTE RIVER                      
            FL
NOAA Chart: 11412                           Latitude:   28°  9.4' N (  28.15670)
USGS Quad:  ELFERS                          Longitude:  82° 44.8' W ( -82.74670)


                            T I D A L   D A T U M S 


Tidal datums at RIVER VILLAGE, ANCLOTE RIVER based on:

     LENGTH OF SERIES:      1 MONTH
     TIME PERIOD:           January 1976 - January 1976
     TIDAL EPOCH:           1983-2001
     CONTROL TIDE STATION:  8726724 CLEARWATER BEACH, GULF OF MEXICO


Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:

     MEAN HIGHER HIGH WATER                     MHHW   =  0.730
     MEAN HIGH WATER                            MHW    =  0.632
     North American Vertical Datum              NAVD88 =  0.441
     MEAN SEA LEVEL                             MSL    =  0.375
     MEAN TIDE LEVEL                            MTL    =  0.369
     MEAN LOW WATER                             MLW    =  0.106
     MEAN LOWER LOW WATER                       MLLW   =  0.000

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     NO 2 1975                                   1.785    1.153
     226                                        12.146   11.514
     227                                        12.139   11.507
     225                                        11.632   11.000


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

                                                                                
Station ID: 8726906                         PUBLICATION DATE:  01/06/2004
Name:       RIVER VILLAGE, ANCLOTE RIVER                      
            FL
NOAA Chart: 11412                           Latitude:   28°  9.4' N (  28.15670)
USGS Quad:  ELFERS                          Longitude:  82° 44.8' W ( -82.74670)


                             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 8726906 RIVER VILLAGE, ANCLOTE RIVER, FL

Revised: 08/08/2018
NOAA / National Ocean Service
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