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Bench Mark Sheet for 8727411, YANKEETOWN, WITHLACOOCHEE 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Superseded Epoch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Small blue map location marker Unpublished bench mark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  5

                                                                                
Station ID: 8727411                         PUBLICATION DATE:  04/29/2004
Name:       YANKEETOWN, WITHLACOOCHEE RIVER                   
            FL
NOAA Chart: 11408                           Latitude:   29°  1.8' N (  29.03000)
USGS Quad:  YANKEETOWN                      Longitude:  82° 42.8' W ( -82.71330)


To reach the tidal bench marks from the intersection of  U.S. Highway 19-98 and
County Road C-40 in Inglis, proceed west on County Road C-40 for 4.2 km (2.6 mi)
to 56th Street, proceed south on 56th Street for 0.3 km (0.2 mi) to Riverside
Drive, then west on Riverside Drive for 0.3 km (0.2 mi) to the U.S. Coast Guard
base.  The bench marks are located near the Coast Guard station and along
Riverside Drive.  The tide gage and staff were located on the Coast Guard
Station pier.


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


                 PRIMARY BENCH MARK STAMPING:  7411 D 1978
                         DESIGNATION:           872 7411 D TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         8191
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  AR1654
SETTING CLASSIFICATION:  Galvanized steel rod                  OPUS PID:        
LATITUDE:   29°  1.8' N (  29.03000)          LONGITUDE:  82° 42.8' W ( -82.71330)


The primary bench mark is a disk located near the intersection of 61st Street
and Riverside Drive in the median of Riverside Drive, 51 m (168 ft) NE of the
centerline of 61st Street, 10 m (32 ft) NW of the centerline of eastbound
Riverside Drive, 8 m (26 ft) SE of the centerline of westbound Riverside Drive,
and 0.58 m (1.9 ft) SW of a power pole with witness sign.  The bench mark is
crimped to the top of a 5/8" galvanized steel rod driven 2.1 m (7 ft) to
refusal, and encased in a PVC pipe and a concrete kickblock.



                         BENCH MARK STAMPING:  7411 B 1978
                         DESIGNATION:           872 7411 B TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         8189
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  AR1656
SETTING CLASSIFICATION:  Concrete base                         OPUS PID:        
LATITUDE:   29°  1.8' N (  29.03000)          LONGITUDE:  82° 43.0' W ( -82.71670)


The bench mark is a disk set in a concrete base supporting a flag pole located
at the old post office building on Harmony Lane (between 62nd and 63rd Streets),
ENE of the town hall, 130 m (428 ft) north of bench mark L 21 1933 7.526, 15 m
(50 ft) NW of the centerline of Harmony Lane, 0.76 m (2.5 ft) east of the SE
corner of the post office, and 0.43 m (1.4 ft) south of the flag pole.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  2 of  5

                                                                                
Station ID: 8727411                         PUBLICATION DATE:  04/29/2004
Name:       YANKEETOWN, WITHLACOOCHEE RIVER                   
            FL
NOAA Chart: 11408                           Latitude:   29°  1.8' N (  29.03000)
USGS Quad:  YANKEETOWN                      Longitude:  82° 42.8' W ( -82.71330)


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


                         BENCH MARK STAMPING:  7411 C 1978
                         DESIGNATION:           872 7411 C TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         8190
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  AR1655
SETTING CLASSIFICATION:  Concrete monument                     OPUS PID:        
LATITUDE:   29°  1.8' N (  29.03000)          LONGITUDE:  82° 42.9' W ( -82.71500)


The bench mark is a disk set in the top of a concrete monument on the south side
of Riverside Drive at the intersection of 62nd Street, 189 m (621 ft) WSW of
bench mark 7411 D 1978, 17 m (56 ft) SW of the centerline of a sand driveway, 6
m (19 ft) SSE of the centerline of eastbound Riverside Drive, and 0.88 m (2.9
ft) NW of a power pole with a witness sign attached, and 0.03 m (0.1 ft) below
the ground. 

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  3 of  5

                                                                                
Station ID: 8727411                         PUBLICATION DATE:  04/29/2004
Name:       YANKEETOWN, WITHLACOOCHEE RIVER                   
            FL
NOAA Chart: 11408                           Latitude:   29°  1.8' N (  29.03000)
USGS Quad:  YANKEETOWN                      Longitude:  82° 42.8' W ( -82.71330)


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


                         BENCH MARK STAMPING:  L 21 1933 7.526
                         DESIGNATION:          L 21

MONUMENTATION:           Bench Mark disk                       VM#:         8192
AGENCY:                  US Coast and Geodetic Survey
                         (USC&GS)                              IDB PID#:  AR0721
SETTING CLASSIFICATION:  Concrete monument                     OPUS PID:        
LATITUDE:   29°  1.8' N (  29.03000)          LONGITUDE:  82° 43.0' W ( -82.71670)


The bench mark is a disk set in the top of a concrete monument at the
intersection of Riverside Drive and 63rd Street, 15.36 m (50.5 ft) SE of the
centerline of Riverside Drive, 8.29 m (27.2 ft) SW of the centerline of the
entrance driveway to Izzak Walton Lodge, and 5.30 m (17.4 ft) NE of the north
corner of teh lodge.  

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  4 of  5

                                                                                
Station ID: 8727411                         PUBLICATION DATE:  04/29/2004
Name:       YANKEETOWN, WITHLACOOCHEE RIVER                   
            FL
NOAA Chart: 11408                           Latitude:   29°  1.8' N (  29.03000)
USGS Quad:  YANKEETOWN                      Longitude:  82° 42.8' W ( -82.71330)


                            T I D A L   D A T U M S 


Tidal datums at YANKEETOWN, WITHLACOOCHEE RIVER based on:

     LENGTH OF SERIES:      6 MONTHS
     TIME PERIOD:           July 1978 - December 1978
     TIDAL EPOCH:           1983-2001
     CONTROL TIDE STATION:  8727520 CEDAR KEY, GULF OF MEXICO


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

     MEAN HIGHER HIGH WATER                     MHHW   =  1.195
     MEAN HIGH WATER                            MHW    =  1.092
     North American Vertical Datum              NAVD88 =  0.677
     MEAN SEA LEVEL                             MSL    =  0.633
     MEAN TIDE LEVEL                            MTL    =  0.628
     MEAN LOW WATER                             MLW    =  0.165
     MEAN LOWER LOW WATER                       MLLW   =  0.000

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     7411 D 1978                                 3.854    2.762
     7411 B 1978                                 3.927    2.835
     7411 C 1978                                 2.710    1.618
     L 21 1933 7.526                             2.669    1.577


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

                                                                                
Station ID: 8727411                         PUBLICATION DATE:  04/29/2004
Name:       YANKEETOWN, WITHLACOOCHEE RIVER                   
            FL
NOAA Chart: 11408                           Latitude:   29°  1.8' N (  29.03000)
USGS Quad:  YANKEETOWN                      Longitude:  82° 42.8' W ( -82.71330)


                             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 8727411 YANKEETOWN, WITHLACOOCHEE RIVER, FL

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