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.