Bench Mark Sheet for 8729736, WOODLAWN BEACH 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Superseded Epoch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Small blue map location marker Unpublished bench mark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: 8729736                         PUBLICATION DATE:  05/20/2004
Name:       WOODLAWN BEACH                                    
            FL
NOAA Chart: 11382                           Latitude:   30° 23.2' N (  30.38670)
USGS Quad:  HOLLEY                          Longitude:  86° 59.5' W ( -86.99170)


To reach the tidal bench marks from the junction of U.S. Highway 98 and State
Highway 87 in Navarre, proceed west on U.S. Highway 98 for 11.3 km (7.0 mi) to
Oak Street, then south on Oak Street for 1.4 km (0.9 mi) to Soundside Drive and
the residence of Mike Simpson, at the SW corner of the intersection.  The bench
marks are along Soundside Drive and Oak Street.  The tide gage and staff were on
a private dock south of the Simpson Residence.


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


                 PRIMARY BENCH MARK STAMPING:  9736 E 1977
                         DESIGNATION:          872 9736 E TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:        10212
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  BG4558
SETTING CLASSIFICATION:  Galvanized steel rod                  OPUS PID:        
LATITUDE:   30° 23.3' N (  30.38830)          LONGITUDE:  86° 59.6' W ( -86.99330)


The primary bench mark is a disk located 91 m (300 ft) west of bench mark 9736 A
1977, 6.25 m (25.5 ft) NNW of the centerline of Soundside Drive, and 0.06 m (0.2
ft) south of a witness post.  The bench mark is set 6 cm (0.2 ft) below ground
level, crimped to the top of a galvanized 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  5

                                                                                
Station ID: 8729736                         PUBLICATION DATE:  05/20/2004
Name:       WOODLAWN BEACH                                    
            FL
NOAA Chart: 11382                           Latitude:   30° 23.2' N (  30.38670)
USGS Quad:  HOLLEY                          Longitude:  86° 59.5' W ( -86.99170)


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


                         BENCH MARK STAMPING:  RANCH 2 1910 1934
                         DESIGNATION:          RANCH 2

MONUMENTATION:           Triangulation Station disk            VM#:        10209
AGENCY:                  US Coast and Geodetic Survey
                         (USC&GS)                              IDB PID#:  BG1892
SETTING CLASSIFICATION:  Vitrified clay pipe                   OPUS PID:        
LATITUDE:   30° 23.2' N (  30.38670)          LONGITUDE:  86° 59.5' W ( -86.99170)


The bench mark is a disk set in a vitrified clay pipe in the front lawn of the
fourth house west of where a power cable crosses the sound, 17.34 m (56.9 ft) SW
of the SE corner of the house, 17.25 m (56.6 ft) SE of the SW corner of the
house, 0.52 m (1.7 ft) west of the west edge of a sidewalk, and level with the
ground.



                         BENCH MARK STAMPING:  9736 A 1977
                         DESIGNATION:          872 9736 A TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:        10210
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  BG4557
SETTING CLASSIFICATION:  Concrete monument                     OPUS PID:        
LATITUDE:   30° 23.3' N (  30.38830)          LONGITUDE:  86° 59.5' W ( -86.99170)


The bench mark is a disk set flush in the top of a concrete monument, 47.15 m
(154.7 ft) north of the gate in the fence around the Peterson residence, 24 m
(80 ft) NW of the NW corner of the Simpson residence, 15 m (50 ft) SSW of the
intersection of Soundside Drive and Oak Street, 0.55 m (1.8 ft) east of a power
pole with witness sign, and level with the ground.

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

                                                                                
Station ID: 8729736                         PUBLICATION DATE:  05/20/2004
Name:       WOODLAWN BEACH                                    
            FL
NOAA Chart: 11382                           Latitude:   30° 23.2' N (  30.38670)
USGS Quad:  HOLLEY                          Longitude:  86° 59.5' W ( -86.99170)


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


                         BENCH MARK STAMPING:  9736 C 1977
                         DESIGNATION:          872 9736 C TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:        10211
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  BG4560
SETTING CLASSIFICATION:  Concrete monument                     OPUS PID:        
LATITUDE:   30° 23.3' N (  30.38830)          LONGITUDE:  86° 59.4' W ( -86.99000)


The bench mark is a disk set in the top of concrete monument, 113 m (370 ft) ENE
of bench mark 9736 A 1977, 27 m (90 ft) NE of the driveway to the Knight
residence, 9.97 m (32.7 ft) NW of the centerline of Soundside Drive, 0.12 m (0.4
ft) north of a witness post, and level with the ground.

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

                                                                                
Station ID: 8729736                         PUBLICATION DATE:  05/20/2004
Name:       WOODLAWN BEACH                                    
            FL
NOAA Chart: 11382                           Latitude:   30° 23.2' N (  30.38670)
USGS Quad:  HOLLEY                          Longitude:  86° 59.5' W ( -86.99170)


                            T I D A L   D A T U M S 


Tidal datums at WOODLAWN BEACH based on:

     LENGTH OF SERIES:      4 MONTHS
     TIME PERIOD:           January 1986 - April 1986
     TIDAL EPOCH:           1983-2001
     CONTROL TIDE STATION:  8729840 PENSACOLA, PENSACOLA BAY


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

     MEAN HIGHER HIGH WATER                     MHHW   =  0.415
     MEAN HIGH WATER                            MHW    =  0.401
     MEAN TIDE LEVEL                            MTL    =  0.204
     MEAN SEA LEVEL                             MSL    =  0.203
     MEAN LOW WATER                             MLW    =  0.007
     MEAN LOWER LOW WATER                       MLLW   =  0.000

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     9736 E 1977                                 2.188    1.787
     RANCH 2 1910 1934                           1.880    1.479
     9736 A 1977                                 5.166    4.765
     9736 C 1977                                 3.874    3.473


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

                                                                                
Station ID: 8729736                         PUBLICATION DATE:  05/20/2004
Name:       WOODLAWN BEACH                                    
            FL
NOAA Chart: 11382                           Latitude:   30° 23.2' N (  30.38670)
USGS Quad:  HOLLEY                          Longitude:  86° 59.5' W ( -86.99170)


                             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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