Bench Mark Sheet for 8725858, VENICE, GULF OF MEXICO 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Superseded Epoch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Small blue map location marker Unpublished bench mark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  9

                                                                                
Station ID: 8725858                         PUBLICATION DATE:  06/02/2011
Name:       VENICE, GULF OF MEXICO                            
            FL
NOAA Chart: 11424                           Latitude:   27°  4.3' N (  27.07170)
USGS Quad:  VENICE                          Longitude:  82° 27.2' W ( -82.45330)


To reach the tidal bench marks from Venice Airport, proceed west on Avenue E to
its end at Harbor Drive, then south on Harbor Drive for 0.8 km (0.5 mi) to
Venice Municipal Pier.  The bench marks are near the municipal pier and north of
the pier at the abandoned U.S. Cost Guard station.  The tide gauge and staff
were at the municipal pier.


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


                 PRIMARY BENCH MARK STAMPING:  5858 A 1977
                         DESIGNATION:          872 5858 A TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:        11353
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  AG7629
SETTING CLASSIFICATION:  Galvanized steel rod                  OPUS PID:        
LATITUDE:   27°  4.4' N (  27.07330)          LONGITUDE:  82° 27.1' W ( -82.45170)


The primary bench mark is a disk located near the Venice municipal pier, 17 m
(57 ft) north of the centerline of the exit dirt road, 15.91 m (52.2 ft) west of
the centerline of Harbor Drive, 15 m (50 ft) south of the dirt entrance road,
and 0.55 m (1.8 ft) NW of the NW corner of the Venice Fishing Pier sign.  The
bench mark is 12 cm (0.4 ft) below the ground, crimped to a galvanized steel rod
driven 12.2 m (40 ft) to refusal, and encased in a 4-inch PVC pipe and concrete
kickblock.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  2 of  9

                                                                                
Station ID: 8725858                         PUBLICATION DATE:  06/02/2011
Name:       VENICE, GULF OF MEXICO                            
            FL
NOAA Chart: 11424                           Latitude:   27°  4.3' N (  27.07170)
USGS Quad:  VENICE                          Longitude:  82° 27.2' W ( -82.45330)


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


                         BENCH MARK STAMPING:  5858 B 1977
                         DESIGNATION:          872 5858 B TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:        11354
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  AG7630
SETTING CLASSIFICATION:  Concrete pier wing wall               OPUS PID:        
LATITUDE:   27°  4.4' N (  27.07330)          LONGITUDE:  82° 27.1' W ( -82.45170)


The bench mark is a disk set in the top of the NE concrete wing wall of the
municipal pier, 136 m (446 ft) west of bench mark 5858 A 1977, 14 m (47 ft) NE
of the east end of the pier, 13 m (42 ft) west of the NW corner of the
concession stand, 3 m (11 ft) SW of the NE end of the pier wing wall, and 0.46 m
(1.5 ft) west of the fence.



                         BENCH MARK STAMPING:  5858 C 1977
                         DESIGNATION:          872 5858 C TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:        11355
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  AG7627
SETTING CLASSIFICATION:  Galvanized steel rod                  OPUS PID:        
LATITUDE:   27°  4.7' N (  27.07830)          LONGITUDE:  82° 27.1' W ( -82.45170)


The bench mark is a disk located at the abandoned Coast Guard Station, 18 m (59
ft) west of the centerline of Harbor Drive, 8 m (26 ft) south of the centerline 
of the paved road leading  to the old Coast Guard Station, and 0.3 m (1.0 ft) SE
of the south leg of the old Coast Guard Station sign.  The bench mark is at
ground level, crimped to the top of a galvanized steel rod driven 12.2 m (40 ft)
to refusal and encased in a 4-inch PVC pipe and concrete kickblock.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  3 of  9

                                                                                
Station ID: 8725858                         PUBLICATION DATE:  06/02/2011
Name:       VENICE, GULF OF MEXICO                            
            FL
NOAA Chart: 11424                           Latitude:   27°  4.3' N (  27.07170)
USGS Quad:  VENICE                          Longitude:  82° 27.2' W ( -82.45330)


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


                         BENCH MARK STAMPING:  5858 E 1977
                         DESIGNATION:          872 5858 E TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:        11356
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  AG7632
SETTING CLASSIFICATION:  Concrete flagpole base                OPUS PID#: AG7632
LATITUDE:   27°  4.7' N (  27.07830)          LONGITUDE:  82° 27.1' W ( -82.45170)


The bench mark is a disk set in the NE corner of the concrete base of the
flagpole at the abandoned Coast Guard station, 60 m (197 ft) SW of bench mark I
WSA 1 1950, 19 m (61 ft) NE of the NE corner of the generator building, 11 m (35
ft) south of the centerline of the paved entrance road, 1 m (2 ft) NE of the
flagpole, and 0.21 m (0.7 ft) SW of the NE corner of the slab.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  4 of  9

                                                                                
Station ID: 8725858                         PUBLICATION DATE:  06/02/2011
Name:       VENICE, GULF OF MEXICO                            
            FL
NOAA Chart: 11424                           Latitude:   27°  4.3' N (  27.07170)
USGS Quad:  VENICE                          Longitude:  82° 27.2' W ( -82.45330)


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


                         BENCH MARK STAMPING:  IWSA 1 1950
                         DESIGNATION:          IWSA 1

MONUMENTATION:           Bench Mark disk                       VM#:        11357
AGENCY:                  US Army Corps of Engineers (USE)      IDB PID#:  AG7628
SETTING CLASSIFICATION:  Concrete monument                     OPUS PID:        
LATITUDE:   27°  4.7' N (  27.07830)          LONGITUDE:  82° 27.1' W ( -82.45170)


The bench mark is a disk set in a 0.3 m (1.0 ft) square concrete monument
located near the Old Coast Guard Station,  55 m (180 ft) WNW of bench mark 5858
C 1977, 26 m (84 ft) east of the SE corner of the wooden fence around a high
voltage transformer, 20 m (65 ft) north of the centerline of the entrance road
to the abandoned Coast Guard station, 13 m (43 ft) east of the east pole of the
Loran antenna, and 1 m (4 ft) south of the east guy wire anchor for the tower.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  5 of  9

                                                                                
Station ID: 8725858                         PUBLICATION DATE:  06/02/2011
Name:       VENICE, GULF OF MEXICO                            
            FL
NOAA Chart: 11424                           Latitude:   27°  4.3' N (  27.07170)
USGS Quad:  VENICE                          Longitude:  82° 27.2' W ( -82.45330)


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


                         BENCH MARK STAMPING:  LORAN 1954
                         DESIGNATION:          LORAN

MONUMENTATION:           Traverse Station disk                 VM#:        11358
AGENCY:                  US Coast and Geodetic Survey
                         (USC&GS)                              IDB PID#:  AG7631
SETTING CLASSIFICATION:  Concrete monument                     OPUS PID:        
LATITUDE:   27°  4.6' N (  27.07670)          LONGITUDE:  82° 27.0' W ( -82.45000)


The bench mark is a disk set in the top of a concrete monument, 47.55 m (156.0
ft) NE of the flagpole, 30.08 m (98.7 ft) north of the centerline of the
entrance road to the abandoned Coast Guard station, 23.62 m (77.5 ft) NW of
Bench Mark 1 WSA 1 1950, 10.73 m (35.2 ft) NW of the east pole of the Loran
antenna, 6.16 m (20.2 ft) NE of the NE corner of the concrete pad for a high
voltage transformer, 4.66 m (15.3 ft) north of the NE corner of the fence, 0.1 m
(0.3 ft) east of a witness post, and 0.12 m (0.4 ft) below the ground.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  6 of  9

                                                                                
Station ID: 8725858                         PUBLICATION DATE:  06/02/2011
Name:       VENICE, GULF OF MEXICO                            
            FL
NOAA Chart: 11424                           Latitude:   27°  4.3' N (  27.07170)
USGS Quad:  VENICE                          Longitude:  82° 27.2' W ( -82.45330)


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


                         BENCH MARK STAMPING:  G 702 2007
                         DESIGNATION:          G 702

MONUMENTATION:           Flange-encased Rod                    VM#:        19924
AGENCY:                  US Coast and Geodetic Survey
                         (USC&GS)                              IDB PID#:  DL2731
SETTING CLASSIFICATION:  Stainless steel rod                   OPUS PID:        
LATITUDE:   27°  4.6' N (  27.07747)          LONGITUDE:  82° 27.0' W ( -82.45044)


The bench mark is a stainless steel rod located from the junction of Airport
Road with South Harbor Drive, South on South Harbor Drive, 2.7 km (1.7 mi) to a
dead end and Caspersen Beach county parking lot on the left, and SE along the
beach for 1.4 km (0.9 mi).  The bench mark is a stainless steel rod driven to
refusal at a depth of 15.9 m (52.3 ft) with an NGS logo cap flush with the
ground and about 1.2 m (4.0 ft) below the level of the dune crest, the datum
point being recessed 0.1 m (0.2 ft) below the level of the NGS logo cap.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  7 of  9

                                                                                
Station ID: 8725858                         PUBLICATION DATE:  06/02/2011
Name:       VENICE, GULF OF MEXICO                            
            FL
NOAA Chart: 11424                           Latitude:   27°  4.3' N (  27.07170)
USGS Quad:  VENICE                          Longitude:  82° 27.2' W ( -82.45330)


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


                         BENCH MARK STAMPING:  H 702 2007
                         DESIGNATION:          H 702

MONUMENTATION:           Survey disk                           VM#:        19925
AGENCY:                  Florida Dept. of Environmental
                         Protection (FLDEP)                    IDB PID#:  DL2732
SETTING CLASSIFICATION:  Round concrete monument               OPUS PID:        
LATITUDE:   27°  3.4' N (  27.05631)          LONGITUDE:  82° 26.5' W ( -82.44228)


The bench mark is a disk set in the top of a round concrete monument flush with
the ground and level with the parking lot, 22.5 m (73.8 ft) south of the
approximate centerline of the entrance road to Caspersen Beach County Park, 3.0
m (9.7 ft) SW of a chain link fence, and 0.6 m (2.0 ft) SE of a carsonite
witness post.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  8 of  9

                                                                                
Station ID: 8725858                         PUBLICATION DATE:  06/02/2011
Name:       VENICE, GULF OF MEXICO                            
            FL
NOAA Chart: 11424                           Latitude:   27°  4.3' N (  27.07170)
USGS Quad:  VENICE                          Longitude:  82° 27.2' W ( -82.45330)


                            T I D A L   D A T U M S 


Tidal datums at VENICE, GULF OF MEXICO based on:

     LENGTH OF SERIES:      4 MONTHS
     TIME PERIOD:           June 1990 - September 1990
     TIDAL EPOCH:           1983-2001
     CONTROL TIDE STATION:  8725110 NAPLES, GULF OF MEXICO


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

     MEAN HIGHER HIGH WATER                     MHHW   =  0.671
     MEAN HIGH WATER                            MHW    =  0.589
     North American Vertical Datum              NAVD88 =  0.497
     MEAN SEA LEVEL                             MSL    =  0.357
     MEAN TIDE LEVEL                            MTL    =  0.351
     MEAN LOW WATER                             MLW    =  0.113
     MEAN LOWER LOW WATER                       MLLW   =  0.000

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     5858 A 1977                                 2.944    2.355
     5858 B 1977                                 3.698    3.109
     5858 C 1977                                 4.404    3.815
     5858 E 1977                                 4.112    3.523
     IWSA 1 1950                                 4.222    3.633
     LORAN 1954                                  4.166    3.577
     G 702 2007                                  2.483    1.894
     H 702 2007                                  2.431    1.842


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 G 702 2007 and H 702 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  9 of  9

                                                                                
Station ID: 8725858                         PUBLICATION DATE:  06/02/2011
Name:       VENICE, GULF OF MEXICO                            
            FL
NOAA Chart: 11424                           Latitude:   27°  4.3' N (  27.07170)
USGS Quad:  VENICE                          Longitude:  82° 27.2' W ( -82.45330)


                             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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