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Bench Mark Sheet for 8727892, FENHOLLOWAY 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Superseded Epoch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Small blue map location marker Unpublished bench mark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: 8727892                         PUBLICATION DATE:  01/06/2004
Name:       FENHOLLOWAY RIVER                                 
            FL
NOAA Chart: 11407                           Latitude:   29° 58.8' N (  29.98000)
USGS Quad:  FENHOLLOWAY RIVER               Longitude:  83° 47.0' W ( -83.78330)


To reach the tidal bench marks from the intersection of U.S. Highway 98 and U.S.
Highway 19/ALT 27 in Perry, proceed west on US Highway 98 for 6.8 km (4.2 mi) to
County Route C356, then turn left and proceed south on County Route C356,
following the paved road for 13.8 km (8.6 mi) to the end of the pavement and a
cattle gap, then proceed on the dirt road 2.4 km (1.5 mi) to a landing on the
Fenholloway River, then continue by boat south from the landing for 1.4 km (1.0
nm).  The bench marks are located along the east shore around a landing. The
tide gage and staff were located on a free standing structure in the Fenholloway
River, approximately 37 m (120 ft) offshore on the east side of the river.


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


                 PRIMARY BENCH MARK STAMPING:  7892 A 1978
                         DESIGNATION:          872 7892 A TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         8254
AGENCY:                  Florida Department of Natural Resources
                         (FLDNR)                               IDB PID#:        
SETTING CLASSIFICATION:  Copper-clad steel rod                 OPUS PID:        
LATITUDE:   29° 58.8' N (  29.98000)          LONGITUDE:  83° 47.0' W ( -83.78330)


The primary bench mark is a disk located on the south end of a strip of
semi-aquatic woody vegetation on the east bank of the Fenholloway River, 20 m
(65 ft) SSW of a palm with a 1 m (2 ft) wide notch around it 5 m (15 ft) off the
ground, 12 m (38 ft) ENE of the edge of vegetation, 5 m (15 ft) ENE of the high
tide line, 3.75 m (12.3 ft) south of a 0.24 m (0.8 ft) diameter palm with an X
blaze, and 2 m (5 ft) south of a witness post.  The bench mark is crimped to the
top of a copper-coated steel rod driven 1.5 (5 ft) to refusal, and encased in a
PVC pipe and concrete kickblock.

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

                                                                                
Station ID: 8727892                         PUBLICATION DATE:  01/06/2004
Name:       FENHOLLOWAY RIVER                                 
            FL
NOAA Chart: 11407                           Latitude:   29° 58.8' N (  29.98000)
USGS Quad:  FENHOLLOWAY RIVER               Longitude:  83° 47.0' W ( -83.78330)


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


                         BENCH MARK STAMPING:  7892 B 1978
                         DESIGNATION:          872 7892 B TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         8255
AGENCY:                  Florida Department of Natural Resources
                         (FLDNR)                               IDB PID#:        
SETTING CLASSIFICATION:  Copper-clad steel rod                 OPUS PID:        
LATITUDE:   29° 58.8' N (  29.98000)          LONGITUDE:  83° 47.0' W ( -83.78330)


The bench mark is a disk located 50 m (165 ft) NE of bench mark 7892 A 1978, 31
m (102 ft) NE of a palm with a 1 m (2 ft) wide notch around it 5 m (15 ft) off
the ground, 25 m (83 ft) ENE of the vegetation line on the east bank of the
Fenholloway River, 6 m (19 ft) SSW of the south bank of a tidal creek heading
generally east, and 2 m (5 ft) south of a witness post.  The bench mark is
crimped to the top of a copper-clad steel rod driven 2.7 (9 ft) to refusal, and
encated in PVC and a concrete kickblock.



                         BENCH MARK STAMPING:  7892 C 1978
                         DESIGNATION:          872 7892 C TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         8256
AGENCY:                  Florida Department of Natural Resources
                         (FLDNR)                               IDB PID#:        
SETTING CLASSIFICATION:  Copper-clad steel rod                 OPUS PID:        
LATITUDE:   29° 58.8' N (  29.98000)          LONGITUDE:  83° 47.0' W ( -83.78330)


The bench mark is a disk located 65 m (213 ft) SE of bench mark 7892 A 1978, 62
m (202 ft) NE of bench mark 7892 D 1978, 60 m (198 ft) NW of bench mark 7892 E
1978, and 1 m (3 ft) SW of a witness post.  The bench mark is crimped to the top
of a copper-coated steel rod driven 1.2 m (4 ft) to refusal, and encased in a
PVC pipe and concrete kickblock.

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

                                                                                
Station ID: 8727892                         PUBLICATION DATE:  01/06/2004
Name:       FENHOLLOWAY RIVER                                 
            FL
NOAA Chart: 11407                           Latitude:   29° 58.8' N (  29.98000)
USGS Quad:  FENHOLLOWAY RIVER               Longitude:  83° 47.0' W ( -83.78330)


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


                         BENCH MARK STAMPING:  7892 D 1978
                         DESIGNATION:          872 7892 D TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         8257
AGENCY:                  Florida Department of Natural Resources
                         (FLDNR)                               IDB PID#:        
SETTING CLASSIFICATION:  Copper-clad steel rod                 OPUS PID:        
LATITUDE:   29° 58.8' N (  29.98000)          LONGITUDE:  83° 47.0' W ( -83.78330)


The bench mark is a disk located 80 m (263 ft) west of bench mark 7892 E 1978,
62 m (202 ft) SW of bench mark 7892 C 1978, and 37 m (121 ft) WSW of the east
bank of Fenholloway River.  The bench mark is crimped to the top of a
copper-coated steel rod driven 3.0 (10 ft) to refusal, and encased in a PVC pipe
and concrete kickblock.



                         BENCH MARK STAMPING:  7892 E 1978
                         DESIGNATION:          872 7892 E TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         8258
AGENCY:                  Florida Department of Natural Resources
                         (FLDNR)                               IDB PID#:        
SETTING CLASSIFICATION:  Copper-clad steel rod                 OPUS PID:        
LATITUDE:   29° 58.8' N (  29.98000)          LONGITUDE:  83° 47.0' W ( -83.78330)


The bench mark is a disk located 80 m (263 ft) east of bench mark 7892 D 1978,
60 m (198 ft) SE of bench mark 7892 C 1978, and 1 m (2 ft) SW of a witness post.
 The bench mark is crimped to the top of a copper-coated steel rod driven 2.7 m
(9 ft) to refusal, and encased in a PVC pipe and concrete kickblock.

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

                                                                                
Station ID: 8727892                         PUBLICATION DATE:  01/06/2004
Name:       FENHOLLOWAY RIVER                                 
            FL
NOAA Chart: 11407                           Latitude:   29° 58.8' N (  29.98000)
USGS Quad:  FENHOLLOWAY RIVER               Longitude:  83° 47.0' W ( -83.78330)


                            T I D A L   D A T U M S 


Tidal datums at FENHOLLOWAY RIVER based on:

     LENGTH OF SERIES:      7 MONTHS
     TIME PERIOD:           June 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   =  1.107
     MEAN HIGH WATER                            MHW    =  1.029
     MEAN TIDE LEVEL                            MTL    =  0.607
     MEAN SEA LEVEL                             MSL    =  0.588
     MEAN LOW WATER                             MLW    =  0.184
     MEAN LOWER LOW WATER                       MLLW   =  0.000

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     7892 A 1978                                 1.217    0.188
     7892 B 1978                                 1.162    0.133
     7892 C 1978                                 1.067    0.038
     7892 D 1978                                 1.165    0.136
     7892 E 1978                                 1.002   -0.026


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

                                                                                
Station ID: 8727892                         PUBLICATION DATE:  01/06/2004
Name:       FENHOLLOWAY RIVER                                 
            FL
NOAA Chart: 11407                           Latitude:   29° 58.8' N (  29.98000)
USGS Quad:  FENHOLLOWAY RIVER               Longitude:  83° 47.0' W ( -83.78330)


                             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 8727892 FENHOLLOWAY RIVER, FL

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