Bench Mark Sheet for 8727695, STEINHATCHEE 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Superseded Epoch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Small blue map location marker Unpublished bench mark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: 8727695                         PUBLICATION DATE:  06/02/2003
Name:       STEINHATCHEE                                      
            FL
NOAA Chart: 11407                           Latitude:   29° 40.3' N (  29.67170)
USGS Quad:  STEINHATCHEE                    Longitude:  83° 23.4' W ( -83.39000)


To reach the tidal bench marks from the Post Office at Steinhatchee, proceed 0.3
km (0.2 mi) west along State Highway 51 to Pace's grocery store.  The bench
marks are located along State Highway 51 and 2nd Avenue.  The tide gage and
staff were located on a concrete pier behind the grocery store.


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


                 PRIMARY BENCH MARK STAMPING:  TIDAL 1 1973
                         DESIGNATION:          872 7695 TIDAL 1 FLDT

MONUMENTATION:           Tidal Station disk                    VM#:         8224
AGENCY:                  Florida Department of Transportation
                         (FLDT)                                IDB PID#:  AR1382
SETTING CLASSIFICATION:  Concrete monument                     OPUS PID#: AR1382
LATITUDE:   29° 40.2' N (  29.67000)          LONGITUDE:  83° 23.0' W ( -83.38330)


The primary bench mark is a disk set in the top of a concrete monument at the SW
corner of the intersection of 2nd Avenue and 7th Street, near the NE property
corner of the Steinhatchee Baptist Church, 23 m (75 ft) SW of the centerline of
the intersection of Seventh Streed and Second Avenue, 18 m (58 ft) west of the
centerline of Seventh Street, 14 m (46 ft) south of the centerline of Second
Avenue, and 0.67 m (2.2 ft) NNE of a utility pole with a witness sign attached.

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

                                                                                
Station ID: 8727695                         PUBLICATION DATE:  06/02/2003
Name:       STEINHATCHEE                                      
            FL
NOAA Chart: 11407                           Latitude:   29° 40.3' N (  29.67170)
USGS Quad:  STEINHATCHEE                    Longitude:  83° 23.4' W ( -83.39000)


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


                         BENCH MARK STAMPING:  TIDAL 2 1973
                         DESIGNATION:          872 7695 TIDAL 2 FLDT

MONUMENTATION:           Tidal Station disk                    VM#:         8225
AGENCY:                  Florida Department of Transportation
                         (FLDT)                                IDB PID#:  AR1383
SETTING CLASSIFICATION:  Concrete monument                     OPUS PID:        
LATITUDE:   29° 40.2' N (  29.67000)          LONGITUDE:  83° 23.2' W ( -83.38670)


The bench mark is a disk set in the top of a concrete monument at the SE corner
of a 90-degree turn at the west end of 2nd Avenue, 30 m (97 ft) east of the NE
corner of a red house, 19 m (62 ft) SE of the centerline at the intersection of
the street at the curve, 4 m (13 ft) NW of a fence corner, and 1 m (2 ft) NW of
a witness post.



                         BENCH MARK STAMPING:  TIDAL NO 3 1973
                         DESIGNATION:          872 7695 TIDAL 3 FLDT

MONUMENTATION:           Tidal Station disk                    VM#:         8226
AGENCY:                  Florida Department of Transportation
                         (FLDT)                                IDB PID#:  AR1384
SETTING CLASSIFICATION:  Concrete sea wall                     OPUS PID:        
LATITUDE:   29° 40.3' N (  29.67170)          LONGITUDE:  83° 23.4' W ( -83.39000)


The bench mark is a disk set in the concrete seawall behind Pace's grocery
store, 37 m (122 ft) SW of the centerline of State Highway 51, 7 m (24 ft) SW of
the SW corner of the grocery store, 4 m (13 ft) south of the SE corner of the
ice house, and 0.3 m (1 ft) SW of an iron pole with a "Phillips 66" sign.

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

                                                                                
Station ID: 8727695                         PUBLICATION DATE:  06/02/2003
Name:       STEINHATCHEE                                      
            FL
NOAA Chart: 11407                           Latitude:   29° 40.3' N (  29.67170)
USGS Quad:  STEINHATCHEE                    Longitude:  83° 23.4' W ( -83.39000)


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


                         BENCH MARK STAMPING:  TIDAL NO 4 1973
                         DESIGNATION:          872 7695 TIDAL 4 FLDT

MONUMENTATION:           Tidal Station disk                    VM#:         8227
AGENCY:                  Florida Department of Transportation
                         (FLDT)                                IDB PID#:  AR1385
SETTING CLASSIFICATION:  Concrete monument                     OPUS PID:        
LATITUDE:   29° 40.4' N (  29.67330)          LONGITUDE:  83° 23.4' W ( -83.39000)


The bench mark is a disk set in the top of a concrete monument located on the
south side of State Highway 51 at the curve in the NE corner of a fence for a
one-story white frame house, 0.2 km (0.1 mi) west of bench mark Tidal NO 3 1973,
30 m (97 ft) south of the SW corner of a hardware store, 24 m (80 ft) SE of a
powerline pole, 18.14 m (59.5 ft) NW of a fire hydrant, 15.54 m (51.0 ft) south
of the centerline of State Highway 51, 3.05 m (10.0 ft) WNW of a fence corner,
and 0.40 m (1.3 ft) west of a witness post.



                         BENCH MARK STAMPING:  TIDAL NO 5 1973
                         DESIGNATION:          872 7695 TIDAL 5 FLDT

MONUMENTATION:           Tidal Station disk                    VM#:         8228
AGENCY:                  Florida Department of Transportation
                         (FLDT)                                IDB PID#:  AR1386
SETTING CLASSIFICATION:  Concrete monument                     OPUS PID:        
LATITUDE:   29° 40.4' N (  29.67330)          LONGITUDE:  83° 23.5' W ( -83.39170)


The bench mark is a disk set in the top of a concrete monument located on the
south side of State Highway 51 at the NE fence corner for an off white frame
house, 0.5 km (0.3 mi) west of bench mark TIDAL NO 3 1973, 15 m (48 ft) south of
the centerline of State Highway 51, 13 m (43 ft) SE of a powerline pole with a
transformer, 12 m (39 ft) NE of the NE corner of an off white frame house, 0.49
m (1.6 ft) north of the NE fence corner.

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

                                                                                
Station ID: 8727695                         PUBLICATION DATE:  06/02/2003
Name:       STEINHATCHEE                                      
            FL
NOAA Chart: 11407                           Latitude:   29° 40.3' N (  29.67170)
USGS Quad:  STEINHATCHEE                    Longitude:  83° 23.4' W ( -83.39000)


                            T I D A L   D A T U M S 


Tidal datums at STEINHATCHEE based on:

     LENGTH OF SERIES:      1 YEAR
     TIME PERIOD:           July 1975 - June 1976
     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:

     HIGHEST OBSERVED WATER LEVEL (10/17/1975)         =  2.084
     MEAN HIGHER HIGH WATER                     MHHW   =  1.166
     MEAN HIGH WATER                            MHW    =  1.082
     North American Vertical Datum              NAVD88 =  0.664
     MEAN TIDE LEVEL                            MTL    =  0.645
     MEAN SEA LEVEL                             MSL    =  0.640
     MEAN LOW WATER                             MLW    =  0.208
     MEAN LOWER LOW WATER                       MLLW   =  0.000
     LOWEST  OBSERVED WATER LEVEL (01/11/1973)         = -0.614

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     TIDAL 1 1973                                4.702    3.620
     TIDAL 2 1973                                5.640    4.558
     TIDAL NO 3 1973                             2.170    1.088
     TIDAL NO 4 1973                             4.947    3.865
     TIDAL NO 5 1973                             2.016    0.934


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

                                                                                
Station ID: 8727695                         PUBLICATION DATE:  06/02/2003
Name:       STEINHATCHEE                                      
            FL
NOAA Chart: 11407                           Latitude:   29° 40.3' N (  29.67170)
USGS Quad:  STEINHATCHEE                    Longitude:  83° 23.4' W ( -83.39000)


                             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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