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Bench Mark Sheet for 8725902, SHAKETT CREEK 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Superseded Epoch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Small blue map location marker Unpublished bench mark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  6

                                                                                
Station ID: 8725902                         PUBLICATION DATE:  05/25/2011
Name:       SHAKETT CREEK                                     
            FL
NOAA Chart: 11424                           Latitude:   27°  7.6' N (  27.12670)
USGS Quad:  VENICE                          Longitude:  82° 26.8' W ( -82.44670)


To reach the tidal bench marks from the intersection of U.S.  Highway 41 and
Pocono Trail, proceed 2.7 km (1.7 mi) to Buena Vista Drive, then 0.6 km (0.4 mi)
north on Buena Vista Drive to Ceil Drive, proceed 0.2 km (0.2 mi) on Ceil Drive
to house #437.  The bench marks are located along Ceil Drive and the seawall
behind the houses.  The tide gage and staff were located on a private dock
behind house #437.


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


                 PRIMARY BENCH MARK STAMPING:  5902 C 1977
                         DESIGNATION:          872 5902 C TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         6099
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  AG7755
SETTING CLASSIFICATION:  Copper-clad steel rod                 OPUS PID:        
LATITUDE:   27°  7.5' N (  27.12500)          LONGITUDE:  82° 27.0' W ( -82.45000)


The primary bench mark is a disk 36.58 m (120.0 ft) west of Bench Mark 5902 A
1977, 31.09 m (102.0 ft) north of the centerline of Ceil Drive, 21.58 m (70.8
ft) north of power pole #14, and 4.48 m (14.7 ft) south of the water's edge. The
bench mark is crimped to the top of a copper-clad steel rod driven an
unspecified depth 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  6

                                                                                
Station ID: 8725902                         PUBLICATION DATE:  05/25/2011
Name:       SHAKETT CREEK                                     
            FL
NOAA Chart: 11424                           Latitude:   27°  7.6' N (  27.12670)
USGS Quad:  VENICE                          Longitude:  82° 26.8' W ( -82.44670)


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


                         BENCH MARK STAMPING:  5902 B 1977
                         DESIGNATION:          872 5902 B TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         6098
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  AG7756
SETTING CLASSIFICATION:  Concrete sea wall                     OPUS PID:        
LATITUDE:   27°  7.5' N (  27.12500)          LONGITUDE:  82° 27.0' W ( -82.45000)


The bench mark is a disk set flush in the concrete seawall, 34.75 m (114.0 ft)
NW of power pole #14-1, 19.20 m (63.0 ft) west of Bench Mark 5902 C 1977, and
2.01 m (6.6 ft) south of the waters edge.



                         BENCH MARK STAMPING:  5902 F 1977
                         DESIGNATION:          872 5902 F TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         6121
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  AG7752
SETTING CLASSIFICATION:  Copper-clad steel rod                 OPUS PID:        
LATITUDE:   27°  7.5' N (  27.12500)          LONGITUDE:  82° 27.0' W ( -82.45000)


The bench mark is a disk located 35.66 m (117.0 ft) SE of Bench Mark 5902 B
1977, 8 m (26 ft) NW of the centerline of Ceil Drive, and 3.75 m (12.3 ft) SE of
power pole #14-1.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  3 of  6

                                                                                
Station ID: 8725902                         PUBLICATION DATE:  05/25/2011
Name:       SHAKETT CREEK                                     
            FL
NOAA Chart: 11424                           Latitude:   27°  7.6' N (  27.12670)
USGS Quad:  VENICE                          Longitude:  82° 26.8' W ( -82.44670)


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


                         BENCH MARK STAMPING:  W 699 2007
                         DESIGNATION:          W 699

MONUMENTATION:           Flange-encased Rod                    VM#:        19931
AGENCY:                  National Geodetic Survey (NGS)        IDB PID#:  DL2733
SETTING CLASSIFICATION:  Stainless steel rod                   OPUS PID:        
LATITUDE:   27°  7.5' N (  27.12481)          LONGITUDE:  82° 27.3' W ( -82.45436)


The bench mark is a stainless steel rod located 6.9 m (22.7 ft) east of the west
end of the center median, 5.9 m (19.2 ft)north of the approximate centerline of
Albee Road eastbound lanes, 4.8 m (15.6 ft) south of the approximate centerline
of Albee Road westbound lanes, and 0.4 m (1.4 ft) east of a carsonite witness
post.  The bench mark is a stainless steel rod driven to refusal at a depth of
5.6 m (18.3 ft) with an NGS logo cap flush with the ground and about 0.2 m (0.8
ft) above the level of Albee Road, the datum point being recessed 0.03 m (0.1
ft) below the level of the NGS logo cap.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  4 of  6

                                                                                
Station ID: 8725902                         PUBLICATION DATE:  05/25/2011
Name:       SHAKETT CREEK                                     
            FL
NOAA Chart: 11424                           Latitude:   27°  7.6' N (  27.12670)
USGS Quad:  VENICE                          Longitude:  82° 26.8' W ( -82.44670)


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


                         BENCH MARK STAMPING:  P 252 1965 10.40
                         DESIGNATION:          P 252

MONUMENTATION:           Bench Mark disk                       VM#:        19932
AGENCY:                  US Coast and Geodetic Survey
                         (USC&GS)                              IDB PID#:        
SETTING CLASSIFICATION:  Round concrete monument               OPUS PID:        
LATITUDE:   27°  7.5' N (  27.12506)          LONGITUDE:  82° 26.8' W ( -82.44719)


The bench mark is a disk set in the top of a round concrete monument recessed
0.2 m (0.6 ft) below the level of the ground and level with Colonia Lane, 9.8 m
(32.3 ft) south of the approximate centerline of Colonia Lane, 8.1 m (26.6 ft)
east of the approximate centerline of a bike trail median, 6.8 m (22.3 ft) west
of a chain link fence, 6.7 m (22.1 ft) west-SW of a chain link fence corner
post, and 0.4 m (1.3 ft) west of a metal witness post.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  5 of  6

                                                                                
Station ID: 8725902                         PUBLICATION DATE:  05/25/2011
Name:       SHAKETT CREEK                                     
            FL
NOAA Chart: 11424                           Latitude:   27°  7.6' N (  27.12670)
USGS Quad:  VENICE                          Longitude:  82° 26.8' W ( -82.44670)


                            T I D A L   D A T U M S 


Tidal datums at SHAKETT CREEK based on:

     LENGTH OF SERIES:      6 MONTHS
     TIME PERIOD:           July 1977 - December 1977
     TIDAL EPOCH:           1983-2001
     CONTROL TIDE STATION:  8726520 ST. PETERSBURG, TAMPA BAY


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

     MEAN HIGHER HIGH WATER                     MHHW   =  0.535
     MEAN HIGH WATER                            MHW    =  0.451
     North American Vertical Datum              NAVD88 =  0.396
     MEAN SEA LEVEL                             MSL    =  0.276
     MEAN TIDE LEVEL                            MTL    =  0.266
     MEAN LOW WATER                             MLW    =  0.080
     MEAN LOWER LOW WATER                       MLLW   =  0.000

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     5902 C 1977                                 1.839    1.388
     5902 B 1977                                 1.697    1.246
     5902 F 1977                                 1.402    0.951
     W 699 2007                                  3.549    3.098
     P 252 1965 10.40                            3.211    2.760


Foot Notes:

Geodetic heights of the bench marks meet all NOAA/NOS/NGS quality control
standards for Second Order, Class 1 leveling.  It is advised that a confirmation
set of levels be established for bench marks P 252 1965 10.40 and W 699 2007 to
verify height differences before using tidal bench mark elevation information.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  6 of  6

                                                                                
Station ID: 8725902                         PUBLICATION DATE:  05/25/2011
Name:       SHAKETT CREEK                                     
            FL
NOAA Chart: 11424                           Latitude:   27°  7.6' N (  27.12670)
USGS Quad:  VENICE                          Longitude:  82° 26.8' W ( -82.44670)


                             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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Revised: 08/08/2018
NOAA / National Ocean Service
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