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Bench Mark Sheet for 8729538, GARNIER BAYOU, SHALIMAR 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Superseded Epoch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Small blue map location marker Unpublished bench mark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: 8729538                         PUBLICATION DATE:  06/02/2003
Name:       GARNIER BAYOU, SHALIMAR                           
            FL
NOAA Chart: 11385                           Latitude:   30° 26.1' N (  30.43500)
USGS Quad:  FORT WALTON BEACH               Longitude:  86° 35.2' W ( -86.58670)


To reach the tidal bench marks from the Shalimar Post Office at the junction of
Cherokee Road and State Highway 85, proceed south on Cherokee Road for 0.6 km
(0.4 mi) to the Shalimar Yacht Basin.  The bench marks are at the Yacht Basin
and along State Highway 85.  The tide gage and staff were located on the wharf
at the Yacht Basin.


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


                 PRIMARY BENCH MARK STAMPING:  1 1973
                         DESIGNATION:          872 9538 TIDAL 1

MONUMENTATION:           Tidal Station disk                    VM#:        10153
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  BG3403
SETTING CLASSIFICATION:  Concrete retaining wall               OPUS PID#: BG3403
LATITUDE:   30° 26.1' N (  30.43500)          LONGITUDE:  86° 35.1' W ( -86.58500)


The primary bench mark is a disk set in the top center of a 0.30 m (1.0 ft) wide
and 1.83 m (6.0 ft) high concrete retaining wall, on the SE side of the Shalimar
Yacht Basin, and 6.40 m (21.0 ft) NW of the centerline of Old Ferry Road.



                         BENCH MARK STAMPING:  2 1973
                         DESIGNATION:          872 9538 TIDAL 2

MONUMENTATION:           Tidal Station disk                    VM#:        10154
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  BG3402
SETTING CLASSIFICATION:  Concrete slab                         OPUS PID:        
LATITUDE:   30° 26.2' N (  30.43670)          LONGITUDE:  86° 35.1' W ( -86.58500)


The bench mark is a disk set flush in a concrete slab at the Shalimar Yacht
Basin,  76 m (250 ft) NW along Gardner Drive from Old Ferry Road, 26 m (85 ft)
SW of the centerline of Gardner Drive, 0.3 m (1 ft) SW of the west corner of a
one story building, and 0.15 m (0.5 ft) SW of the SW face of the building.

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

                                                                                
Station ID: 8729538                         PUBLICATION DATE:  06/02/2003
Name:       GARNIER BAYOU, SHALIMAR                           
            FL
NOAA Chart: 11385                           Latitude:   30° 26.1' N (  30.43500)
USGS Quad:  FORT WALTON BEACH               Longitude:  86° 35.2' W ( -86.58670)


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


                         BENCH MARK STAMPING:  Q 297 1967
                         DESIGNATION:          Q 297

MONUMENTATION:           Bench Mark disk                       VM#:        10156
AGENCY:                  US Coast and Geodetic Survey
                         (USC&GS)                              IDB PID#:  BG2047
SETTING CLASSIFICATION:  Concrete monument                     OPUS PID:        
LATITUDE:   30° 26.9' N (  30.44830)          LONGITUDE:  86° 34.8' W ( -86.58000)


The bench mark is a disk set in the top of a concrete monument, 0.3 km (0.2 mi)
east along Richbourg Avenue from the east end of Meigs Junior High School in
Shalimar, 46 m (151 ft) NW of and across Richbourg Avenue from the west bound
lane of State Highway 85, 9.45 m (31.0 ft) east of the centerline of Carl Brandt
Drive, 7.62 m (25.0 ft) north of the centerline of Richbourg Avenue, 1.37 m (4.5
ft) SE of the SW corner post of a fence around a park, 0.30 m (1 ft) north of
the north edge of a sidewalk along the north side of the avenue, and at ground
level.



                         BENCH MARK STAMPING:  3 1973
                         DESIGNATION:          872 9538 TIDAL 3

MONUMENTATION:           Tidal Station disk                    VM#:        10157
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  BG3399
SETTING CLASSIFICATION:  Concrete base                         OPUS PID#: BG3399
LATITUDE:   30° 26.5' N (  30.44170)          LONGITUDE:  86° 34.9' W ( -86.58170)


The bench mark is a disk set in the top of the concrete base for a sign, 7 m (23
ft) NE of the centerline of Cherokee Road, 15 m (50 ft) SE of the centerline of
State Highway 85, and 2.44 m (8.0 ft) east of powerline pole #  355.

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

                                                                                
Station ID: 8729538                         PUBLICATION DATE:  06/02/2003
Name:       GARNIER BAYOU, SHALIMAR                           
            FL
NOAA Chart: 11385                           Latitude:   30° 26.1' N (  30.43500)
USGS Quad:  FORT WALTON BEACH               Longitude:  86° 35.2' W ( -86.58670)


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


                         BENCH MARK STAMPING:  4 1973
                         DESIGNATION:          872 9538 TIDAL 4

MONUMENTATION:           Tidal Station disk                    VM#:        10158
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  BG3400
SETTING CLASSIFICATION:  Concrete base                         OPUS PID:        
LATITUDE:   30° 26.4' N (  30.44000)          LONGITUDE:  86° 35.1' W ( -86.58500)


The bench mark is a disk set in the top of a 1 m x 2 m (4 ft x 7 ft) concrete
base near the north side of the Shalimar Post Office, 5 m (15 ft) NE of the east
corner of the Post Office, 38 m (125 ft) NW of the centerline of State Highway
85, 12 m (40 ft) SW of the centerline of Turner Trail, and 2 m (8 ft) SE of a
flagpole.



                         BENCH MARK STAMPING:  5 1989
                         DESIGNATION:          872 9538 TIDAL 5

MONUMENTATION:           Tidal Station disk                    VM#:        10159
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Concrete flagpole foundation          OPUS PID:        
LATITUDE:   30° 26.1' N (  30.43500)          LONGITUDE:  86° 35.2' W ( -86.58670)


The bench mark is a disk set flush in the concrete flagpole foundation in front
of the Shalimar Police Department Building, 7 m (22 ft) west of the Police
Department door step, 17 m (56 ft) south of utility pole # 34364-52917, 8 m (25
ft) east of the centerline of Cherokee Road, 29 m (95 ft) north of a utility
pole with a street lamp on it, 0.40 m (1.3 ft) NE from the base of the flagpole,
and 0.21 m (0.7 ft) of the NE edge of the concrete base.

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

                                                                                
Station ID: 8729538                         PUBLICATION DATE:  06/02/2003
Name:       GARNIER BAYOU, SHALIMAR                           
            FL
NOAA Chart: 11385                           Latitude:   30° 26.1' N (  30.43500)
USGS Quad:  FORT WALTON BEACH               Longitude:  86° 35.2' W ( -86.58670)


                            T I D A L   D A T U M S 


Tidal datums at GARNIER BAYOU, SHALIMAR based on:

     LENGTH OF SERIES:      2 YEARS
     TIME PERIOD:           June 1976 - May 1978
     TIDAL EPOCH:           1983-2001
     CONTROL TIDE STATION:  8729840 PENSACOLA, PENSACOLA BAY


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

     HIGHEST OBSERVED WATER LEVEL (10/04/1992)         =  0.805
     MEAN HIGHER HIGH WATER                     MHHW   =  0.124
     MEAN HIGH WATER                            MHW    =  0.119
     MEAN TIDE LEVEL                            MTL    =  0.064
     MEAN SEA LEVEL                             MSL    =  0.059
     MEAN LOW WATER                             MLW    =  0.008
     MEAN LOWER LOW WATER                       MLLW   =  0.000
     North American Vertical Datum              NAVD88 = -0.060
     LOWEST  OBSERVED WATER LEVEL (07/08/1992)         =  0.104

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     1 1973                                      2.916    2.797
     2 1973                                      2.194    2.075
     Q 297 1967                                  4.760    4.641
     3 1973                                      3.911    3.792
     4 1973                                      2.940    2.821
     5 1989                                      3.831    3.712


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

                                                                                
Station ID: 8729538                         PUBLICATION DATE:  06/02/2003
Name:       GARNIER BAYOU, SHALIMAR                           
            FL
NOAA Chart: 11385                           Latitude:   30° 26.1' N (  30.43500)
USGS Quad:  FORT WALTON BEACH               Longitude:  86° 35.2' W ( -86.58670)


                             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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Products available at 8729538 GARNIER BAYOU, SHALIMAR, FL

Revised: 10/15/2013
NOAA / National Ocean Service
Web site owner: Center for Operational Oceanographic Products and Services