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Bench Mark Sheet for 8727395, PORT INGLIS, 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Superseded Epoch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Small blue map location marker Unpublished bench mark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.

Error: There is no bench mark map available for 8727395 PORT INGLIS, WITHLACOOCHEE RIVER, FL
Printable version

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
Datums Page                                                        Page  1 of  5

                                                                                
Station ID: 8727395                                PUBLICATION DATE:  04/01/2004
Name:       PORT INGLIS, WITHLACOOCHEE R.                     
            FLORIDA
NOAA Chart: 11408                                  Latitude:         29°  0.1' N
USGS Quad:  WITHLACOOCHE BAY                       Longitude:        82° 45.5' W


To reach the tidal bench marks from the intersection of U.S. Highway 19-98 and
State Road C-40 in Inglis, proceed west on State Highway C-40 for 10.3 km (6.4
mi) to its end at a county park and boat ramp. The bench marks are located along
State Road C-40 and around the county park. The tide gage and staff were located
on the boat ramp at the end of State Road C-40.


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


                 PRIMARY BENCH MARK STAMPING:  7395 B 1978
                         DESIGNATION:          872 7395 B TIDAL

MONUMENTATION:           Tidal Station disk                        VM#:     8185
AGENCY:                  National Ocean Survey (NOS)               PID#:  AR1661
SETTING CLASSIFICATION:  Galvanized steel rod


The primary bench mark is a disk, 214 m (703 ft) east of the boat ramp, 24.08 m
(79.0 ft) SSW of a powerline pole on the north side of the road, 11.67 m (38.3
ft) south of the centerline of State Road C-40, and 0.40 m (1.3 ft) north of a
witness post.  The bench mark is crimped to a galvanized steel rod driven 4.6 m
(15 ft) to refusal, and encased in a PVC pipe and concrete kickblock.



                         BENCH MARK STAMPING:  7395 A 1978
                         DESIGNATION:          872 7395 A TIDAL

MONUMENTATION:           Tidal Station disk                        VM#:     8184
AGENCY:                  National Ocean Survey (NOS)               PID#:  AR1662
SETTING CLASSIFICATION:  Concrete pedestal


The bench mark is a disk set in the top of a concrete pedestal for the south
wall of the boat ramp, 6.31 m (20.7 ft) west of a palm tree and 2.96 m (9.7 ft)
south of the centerline of the boat ramp.

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

                                                                                
Station ID: 8727395                                PUBLICATION DATE:  04/01/2004
Name:       PORT INGLIS, WITHLACOOCHEE R.                     
            FLORIDA
NOAA Chart: 11408                                  Latitude:         29°  0.1' N
USGS Quad:  WITHLACOOCHE BAY                       Longitude:        82° 45.5' W


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


                         BENCH MARK STAMPING:  7395 C 1978
                         DESIGNATION:          872 7395 C TIDAL

MONUMENTATION:           Tidal Station disk                        VM#:     8186
AGENCY:                  National Ocean Survey (NOS)               PID#:  AR1660
SETTING CLASSIFICATION:  Galvanized steel rod


The bench mark is a disk located 83 m (271 ft) NE of bench mark 7395 B 1978,
29.26 m (96.0 ft) NW of a radioactive warning siren pole, 26 m (86 ft) west of
the centerline of the gravel road leading to the park office and bath house, 8 m
(25 ft) south of the centerline of State Road C-40, 5.64 m (18.5 ft) south of a
power pole with a transformer, and 0.3 m (1 ft) north of a witness post. The
bench mark is crimped to the top of a galvanized steel rod driven 7.0 m (23 ft)
to refusal, and encased in a PVC pipe and concrete kickblock.



                         BENCH MARK STAMPING:  7395 D 1978
                         DESIGNATION:          872 7395 D TIDAL

MONUMENTATION:           Tidal Station disk                        VM#:     8187
AGENCY:                  National Ocean Survey (NOS)               PID#:  AR1664
SETTING CLASSIFICATION:  Concrete monument


The bench mark is a disk set in a concrete monument located near the picnic
area, 92 m (302 ft) north of bench mark 7395 E 1978, 21 m (69 ft) SE of the
shoreline, 14 m (47 ft) west of the NW corner of the park office trailer, 6.40 m
(21.0 ft) SW of the SW corner of a concrete picnic table, 2.13 m (7.0 ft) NW of
a 0.3 m (1 ft) diameter palm tree, and 0.3 m (1 ft)  north of a witness post.

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

                                                                                
Station ID: 8727395                                PUBLICATION DATE:  04/01/2004
Name:       PORT INGLIS, WITHLACOOCHEE R.                     
            FLORIDA
NOAA Chart: 11408                                  Latitude:         29°  0.1' N
USGS Quad:  WITHLACOOCHE BAY                       Longitude:        82° 45.5' W


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


                         BENCH MARK STAMPING:  7395 E 1978
                         DESIGNATION:          872 7395 E TIDAL

MONUMENTATION:           Tidal Station disk                        VM#:     8188
AGENCY:                  National Ocean Survey (NOS)               PID#:  AR1663
SETTING CLASSIFICATION:  Concrete monument


The bench mark is a disk set in a concrete monument, 97 m (317 ft) north of
bench mark 7395 C 1978, 13 m (42 ft) west of the centerline of the gravel road
leading to the park office and bath house, 8.81 m (28.9 ft) NE of the NE corner
of the bath house, 0.88 m (2.9 ft) north of a power pole, and 0.03 m (0.1 ft)
below the ground. 

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

                                                                                
Station ID: 8727395                                PUBLICATION DATE:  04/01/2004
Name:       PORT INGLIS, WITHLACOOCHEE R.                     
            FLORIDA
NOAA Chart: 11408                                  Latitude:         29°  0.1' N
USGS Quad:  WITHLACOOCHE BAY                       Longitude:        82° 45.5' W


                            T I D A L   D A T U M S 


Tidal datums at PORT INGLIS, WITHLACOOCHEE R. based on:

     LENGTH OF SERIES:      2 MONTHS
     TIME PERIOD:           September 1978 - October 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   =  1.234
     MEAN HIGH WATER                            MHW    =  1.122
     North American Vertical Datum              NAVD88 =  0.780
     MEAN TIDE LEVEL                            MTL    =  0.651
     MEAN SEA LEVEL                             MSL    =  0.648
     MEAN LOW WATER                             MLW    =  0.180
     MEAN LOWER LOW WATER                       MLLW   =  0.000

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     7395 B 1978                                 1.731    0.609
     7395 A 1978                                 2.722    1.600
     7395 C 1978                                 1.787    0.665
     7395 D 1978                                 1.791    0.669
     7395 E 1978                                 2.236    1.114


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

                                                                                
Station ID: 8727395                                PUBLICATION DATE:  04/01/2004
Name:       PORT INGLIS, WITHLACOOCHEE R.                     
            FLORIDA
NOAA Chart: 11408                                  Latitude:         29°  0.1' N
USGS Quad:  WITHLACOOCHE BAY                       Longitude:        82° 45.5' W


                             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 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 8727395 PORT INGLIS, WITHLACOOCHEE RIVER, FL

Revised: 10/15/2013
NOAA / National Ocean Service
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