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Bench Mark Sheet for 8729613, HARRIS, SANTA ROSA SOUND 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Superseded Epoch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Small blue map location marker Unpublished bench mark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: 8729613                         PUBLICATION DATE:  05/12/2004
Name:       HARRIS, SANTA ROSA SOUND                          
            FL
NOAA Chart: 11388                           Latitude:   30° 24.5' N (  30.40830)
USGS Quad:  MARY ESTHER                     Longitude:  86° 43.9' W ( -86.73170)


To reach the tidal bench marks from the City Hall in Fort Walton Beach, proceed
west on U.S. Highway 98 for 10.86 km (6.75 mi) to a private drive east of Casa
Marina Drive, then turn and proceed south along the private drive for 0.3 km
(0.2 mi) to the residence of  Mr. Ed Seymore.  The bench marks are along U.S.
Highway 98 and the private drive.  The tide gage and staff were on a dock in
Santa Rosa Sound, behind the Seymore residence.


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


                 PRIMARY BENCH MARK STAMPING:  NO 1 1935
                         DESIGNATION:          872 9613 TIDAL 1

MONUMENTATION:           Bench Mark disk                       VM#:        10185
AGENCY:                  US Coast and Geodetic Survey
                         (USC&GS)                              IDB PID#:  BG3590
SETTING CLASSIFICATION:  Concrete filled pipe                  OPUS PID:        
LATITUDE:   30° 24.5' N (  30.40830)          LONGITUDE:  86° 44.0' W ( -86.73330)


The primary bench mark is a disk set in the top of a concrete filled tile pipe,
in the front lawn of the Lalor residence (the second house west of the Seymoure
residence), 40 m (131 ft) north of the shoreline, 16.76 m (55.0 ft) SE of the SW
corner of the house, 16.25 m (53.3 ft) SW of the SE corner of the house, 15.85 m
(52.0 ft) east of a fence, 6.04 m (19.8 ft) west of the centerline of a walkway
leading to the beach, and 9 cm (0.3 ft) above ground level.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  2 of  6

                                                                                
Station ID: 8729613                         PUBLICATION DATE:  05/12/2004
Name:       HARRIS, SANTA ROSA SOUND                          
            FL
NOAA Chart: 11388                           Latitude:   30° 24.5' N (  30.40830)
USGS Quad:  MARY ESTHER                     Longitude:  86° 43.9' W ( -86.73170)


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


                         BENCH MARK STAMPING:  9613 A 1977
                         DESIGNATION:          872 9613 A TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:        10183
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  BG3589
SETTING CLASSIFICATION:  Copper clad steel rod                 OPUS PID:        
LATITUDE:   30° 24.6' N (  30.41000)          LONGITUDE:  86° 43.9' W ( -86.73170)


The bench mark is a disk located in the back yard of the property belonging to
Mr. Ed Seymore,18.68 m (61.3 ft) north of the east-west fence paralleling the
shoreline, 13.01 m (42.7 ft) ENE of the SE corner of the residence, 12.95 m
(42.5 ft) SE of the NE corner of the residence, and 6.10 m (20.0 ft) SSW of a
large cedar tree.  The bench mark is set 6 cm (0.2 ft), below ground level,
crimped to the top of a copper-clad steel rod driven 12.2 m (40 ft) to refusal,
and encased in a PVC pipe and concrete kickblock.



                         BENCH MARK STAMPING:  9613 B 1977
                         DESIGNATION:          872 9613 B TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:        10184
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  BG3588
SETTING CLASSIFICATION:  Gavanized steel rod                   OPUS PID:        
LATITUDE:   30° 24.6' N (  30.41000)          LONGITUDE:  86° 44.0' W ( -86.73330)


The bench mark is a disk located 111.3 m (365.0 ft) NNW of bench mark 9613 A
1977, 16.64 m (54.6 ft) SW of the SW corner of a white house just north of the
Seymore residence, 5.55 m (18.2 ft) west of the centerline of the private drive,
0.27 m (0.9 ft) east of a witness post, and underneath an overhead powerline. 
The bench mark is set 12 cm (0.4 ft) below ground level, crimped to the top of a
galvanized steel rod driven to a depth of 12.2 m (40 ft), and encased in a PVC
pipe and concrete kickblock.

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

                                                                                
Station ID: 8729613                         PUBLICATION DATE:  05/12/2004
Name:       HARRIS, SANTA ROSA SOUND                          
            FL
NOAA Chart: 11388                           Latitude:   30° 24.5' N (  30.40830)
USGS Quad:  MARY ESTHER                     Longitude:  86° 43.9' W ( -86.73170)


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


                         BENCH MARK STAMPING:  NO 3 1935
                         DESIGNATION:          872 9613 TIDAL 3

MONUMENTATION:           Tidal Station disk                    VM#:        10186
AGENCY:                  US Coast and Geodetic Survey
                         (USC&GS)                              IDB PID#:  BG3587
SETTING CLASSIFICATION:  Concrete filled pipe                  OPUS PID:        
LATITUDE:   30° 24.7' N (  30.41170)          LONGITUDE:  86° 43.9' W ( -86.73170)


The bench mark is a disk set in the top of a concrete filled pipe, at the SE
corner of the junction of U.S. Highway 98 and the private drive to the Seymoure
residence, 16.76 m (55.0 ft), south of the centerline of the eastbound lane of
U.S. Highway 98, 2.29 m (7.5 ft) east of the centerline of the private drive,
2.13 m (7.0 ft) SE of the east stone gate post to the drive, 3.66 m (12.0 ft)
WSW of a gas pipeline installation, and 6 cm (0.2 ft) above ground level.

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

                                                                                
Station ID: 8729613                         PUBLICATION DATE:  05/12/2004
Name:       HARRIS, SANTA ROSA SOUND                          
            FL
NOAA Chart: 11388                           Latitude:   30° 24.5' N (  30.40830)
USGS Quad:  MARY ESTHER                     Longitude:  86° 43.9' W ( -86.73170)


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


                         BENCH MARK STAMPING:  U 297 1967
                         DESIGNATION:          U 297

MONUMENTATION:           Vertical Control disk                 VM#:        10187
AGENCY:                  US Coast and Geodetic Survey
                         (USC&GS)                              IDB PID#:  BG1986
SETTING CLASSIFICATION:  Concrete monument                     OPUS PID:        
LATITUDE:   30° 24.7' N (  30.41170)          LONGITUDE:  86° 43.8' W ( -86.73000)


The bench mark is a disk set in the top of a concrete monument,  112.8 m (370.0
ft) east of the centerline of a dirt road leading north, 13.72 m (45.0 ft) north
of the centerline of the westbound lane of U.S. Highway 98, 9.14 m (30.0 ft) NW
of the west end of the north head wall of an 0.46 m (1.5 ft) diameter culvert,
1.52 m (5.0 ft) north of a powerline pole, 0.61 m (2.0 ft) south of a witness
post, 0.08 km (0.05 mi) east of the drive to the Seymoure residence, and 9 cm
(0.3 ft) above ground level.

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

                                                                                
Station ID: 8729613                         PUBLICATION DATE:  05/12/2004
Name:       HARRIS, SANTA ROSA SOUND                          
            FL
NOAA Chart: 11388                           Latitude:   30° 24.5' N (  30.40830)
USGS Quad:  MARY ESTHER                     Longitude:  86° 43.9' W ( -86.73170)


                            T I D A L   D A T U M S 


Tidal datums at HARRIS, SANTA ROSA SOUND based on:

     LENGTH OF SERIES:      4 MONTHS
     TIME PERIOD:           May 1977 - August 1977
     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   =  0.380
     MEAN HIGH WATER                            MHW    =  0.364
     MEAN SEA LEVEL                             MSL    =  0.201
     MEAN TIDE LEVEL                            MTL    =  0.190
     North American Vertical Datum              NAVD88 =  0.097
     MEAN LOW WATER                             MLW    =  0.017
     MEAN LOWER LOW WATER                       MLLW   =  0.000

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     NO 1 1935                                   3.359    2.995
     9613 A 1977                                 4.209    3.845
     9613 B 1977                                 5.120    4.756
     NO 3 1935                                   7.295    6.931
     U 297 1967                                  6.290    5.926


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

                                                                                
Station ID: 8729613                         PUBLICATION DATE:  05/12/2004
Name:       HARRIS, SANTA ROSA SOUND                          
            FL
NOAA Chart: 11388                           Latitude:   30° 24.5' N (  30.40830)
USGS Quad:  MARY ESTHER                     Longitude:  86° 43.9' W ( -86.73170)


                             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 8729613 HARRIS, SANTA ROSA SOUND, FL

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