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Bench Mark Sheet for 8729085, PEARL BAYOU, EAST BAY 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Superseded Epoch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Small blue map location marker Unpublished bench mark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: 8729085                         PUBLICATION DATE:  02/05/2004
Name:       PEARL BAYOU, EAST BAY                             
            FL
NOAA Chart: 11389                           Latitude:   30°  5.9' N (  30.09830)
USGS Quad:  LONG POINT                      Longitude:  85° 36.8' W ( -85.61330)


To reach the tidal bench marks from the intersection of U.S. Highway 98 Business
and U.S. Highway 98 (Bypass), proceed south on U.S. Highway 98 for 3.1 km (1.9
mi) to the SW end of the Dupont Bridge over East Bay, on Tyndall Air Force Base.
 The bench marks are located along U.S. Highway 98.  The tide gage and staff
were located on the Tyndall AFB Special Services Dock.


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


                 PRIMARY BENCH MARK STAMPING:  9083 A 1976
                         DESIGNATION:          872 9083 A TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         9988
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  BE3012
SETTING CLASSIFICATION:  Copper-clad steel rod                 OPUS PID:        
LATITUDE:   30°  5.9' N (  30.09830)          LONGITUDE:  85° 36.8' W ( -85.61330)


The primary bench mark is a disk located 21.49 m (70.5 ft) north of the NW
corner of Tyndall Air Force Base Food Mart, 12.92 m (42.4 ft) east of the
easternmost curb of U.S. Highway 98, 11.09 m (36.4 ft) WNW of a 0.46 m (1.5 ft)
diameter magnolia tree, 0.40 m (1.3 ft) NE of a power pole # 51, and 0.61 m (2.0
ft) west of a witness post.  The bench mark is 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.

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

                                                                                
Station ID: 8729085                         PUBLICATION DATE:  02/05/2004
Name:       PEARL BAYOU, EAST BAY                             
            FL
NOAA Chart: 11389                           Latitude:   30°  5.9' N (  30.09830)
USGS Quad:  LONG POINT                      Longitude:  85° 36.8' W ( -85.61330)


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


                         BENCH MARK STAMPING:  MM 7 1968
                         DESIGNATION:          MM 7 USE

MONUMENTATION:           Survey disk                           VM#:         9987
AGENCY:                  US Army Corps of Engineers (USE)      IDB PID#:  BE3013
SETTING CLASSIFICATION:  Concrete monument                     OPUS PID:        
LATITUDE:   30°  6.0' N (  30.10000)          LONGITUDE:  85° 36.8' W ( -85.61330)


The bench mark is a disk set in the top of a concrete monument, 14.81 m (48.6
ft) south of a powerline pole, 14.57 m (47.8 ft) west of the westernmost curb of
U.S. Highway 98, 7.13 m (23.4 ft) north of a concrete pad, 0.82 m (2.7 ft) east
of a U.S. Army Corps of Engineers witness post, and 0.03 m (0.1 ft) above ground
level.



                         BENCH MARK STAMPING:  9083 B 1976
                         DESIGNATION:          872 9083 B TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         9989
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  BE3011
SETTING CLASSIFICATION:  Copper-clad steel rod                 OPUS PID:        
LATITUDE:   30°  5.9' N (  30.09830)          LONGITUDE:  85° 36.8' W ( -85.61330)


The bench mark is a disk located 23 m (74 ft) west of the NW corner of a garage
at 230 Jefferson Boulevard, 17 m (55 ft) east of the centerline of the
northbound lane of U.S. Highway 98, 8 m (27 ft) east of a power pole with a
flashing yellow traffic light, 6.25 m (20.5 ft) west of the centerline of
Jefferson Boulevard, and 0.30 m (1.0 ft) west of telephone pole #1494 with a
witness sign.  The bench mark is set 12 cm (0.4 ft) below ground level, crimped
to the top of a copper-clad steel rod driven 14.6 m (48 ft) to refusal, and
encased in PVC pipe and concrete kickblock.  NOTE: Mark not found in 1999 by US
Power Squadron.

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

                                                                                
Station ID: 8729085                         PUBLICATION DATE:  02/05/2004
Name:       PEARL BAYOU, EAST BAY                             
            FL
NOAA Chart: 11389                           Latitude:   30°  5.9' N (  30.09830)
USGS Quad:  LONG POINT                      Longitude:  85° 36.8' W ( -85.61330)


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


                         BENCH MARK STAMPING:  9083 D 9085 D
                         DESIGNATION:          872 9083 D TIDAL FLDT

MONUMENTATION:           Bench Mark disk                       VM#:         9990
AGENCY:                  Florida Department of Transportation
                         (FLDT)                                IDB PID#:  BE3015
SETTING CLASSIFICATION:  Concrete curb                         OPUS PID:        
LATITUDE:   30°  6.1' N (  30.10170)          LONGITUDE:  85° 36.7' W ( -85.61170)


The bench mark is a disk set in the curb of the SW end of the Dupont Bridge, 15
m (50 ft) east of a group of five palm trees, 10.33 m (33.9 ft) NW of the
centerline of the bridge median, 0.21 m (0.7 ft) SE of the bridge rail, and is
0.3 m (1 ft) above the pavement.

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

                                                                                
Station ID: 8729085                         PUBLICATION DATE:  02/05/2004
Name:       PEARL BAYOU, EAST BAY                             
            FL
NOAA Chart: 11389                           Latitude:   30°  5.9' N (  30.09830)
USGS Quad:  LONG POINT                      Longitude:  85° 36.8' W ( -85.61330)


                            T I D A L   D A T U M S 


Tidal datums at PEARL BAYOU, EAST BAY based on:

     LENGTH OF SERIES:      2 MONTHS
     TIME PERIOD:           July 1976 - August 1976
     TIDAL EPOCH:           1983-2001
     CONTROL TIDE STATION:  8729108 PANAMA CITY, ST. ANDREW BAY


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

     MEAN HIGHER HIGH WATER                     MHHW   =  0.428
     MEAN HIGH WATER                            MHW    =  0.398
     MEAN SEA LEVEL                             MSL    =  0.215
     MEAN TIDE LEVEL                            MTL    =  0.210
     North American Vertical Datum              NAVD88 =  0.174
     MEAN LOW WATER                             MLW    =  0.021
     MEAN LOWER LOW WATER                       MLLW   =  0.000

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     9083 A 1976                                 2.991    2.593
     MM 7 1968                                   3.616    3.218
     9083 B 1976                                 2.429    2.031
     9083 D 9085 D                               6.254    5.856


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

                                                                                
Station ID: 8729085                         PUBLICATION DATE:  02/05/2004
Name:       PEARL BAYOU, EAST BAY                             
            FL
NOAA Chart: 11389                           Latitude:   30°  5.9' N (  30.09830)
USGS Quad:  LONG POINT                      Longitude:  85° 36.8' W ( -85.61330)


                             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 8729085 PEARL BAYOU, EAST BAY, FL

Revised: 08/08/2018
NOAA / National Ocean Service
Web site owner: Center for Operational Oceanographic Products and Services