Bench Mark Sheet for 8726539, NEWMAN BRANCH

Superseded Epoch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Small blue map location marker Unpublished bench mark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: 8726539                         PUBLICATION DATE:  03/16/2011
Name:       NEWMAN BRANCH                                     
            FL
NOAA Chart: 11413                           Latitude:   27° 47.0' N (  27.78330)
USGS Quad:  GIBSONTON                       Longitude:  82° 24.4' W ( -82.40670)


To reach the tidal bench marks from the intersection of U.S. Highway 41 (South
Tamiami Trail) and Apollo Beach Boulevard, proceed 1.1 km (0.7 mi) west on
Apollo Beach Boulevard to Dickman Road, then turn right and proceed north on
Dickman Road for 0.8 km (0.5 mi) to Newman Branch Creek.  The bench marks are in
the vicinity of Dickman Road and Newman Branch Creek.  The tide gage and staff
were on the end of a small pier west of Dickman Road bridge over Newman Branch
Creek.


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


                 PRIMARY BENCH MARK STAMPING:  6539 A 1977
                         DESIGNATION:          872 6539 A TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         6552
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  AG7597
SETTING CLASSIFICATION:  Copper-clad steel rod                 OPUS PID:        
LATITUDE:   27° 46.9' N (  27.78170)          LONGITUDE:  82° 24.1' W ( -82.40170)


The primary bench mark is a disk located west of Dickman Road along the north
bank of Newman Branch creek, 70 m (230 ft) west of the NW corner of the bridge
over the creek, and 0.24 m (0.8 ft) south of a witness post.  The bench mark
disk 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 projecting 6 cm (0.2 ft) with concrete
kickblock.

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

                                                                                
Station ID: 8726539                         PUBLICATION DATE:  03/16/2011
Name:       NEWMAN BRANCH                                     
            FL
NOAA Chart: 11413                           Latitude:   27° 47.0' N (  27.78330)
USGS Quad:  GIBSONTON                       Longitude:  82° 24.4' W ( -82.40670)


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


                         BENCH MARK STAMPING:  6539 B 1977
                         DESIGNATION:          872 6539 B TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         6553
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  AG7596
SETTING CLASSIFICATION:  Concrete bridge abutment              OPUS PID:        
LATITUDE:   27° 46.9' N (  27.78170)          LONGITUDE:  82° 24.0' W ( -82.40000)


The bench mark is a disk set in the bridge abutment at the NW corner of the
bridge over Newman Branch Creek, 70 m (230 ft) east of bench mark 6539 A 1977,
18.59 m (61.0 ft) north of the south end of the bridge, 6.40 m (21.0 ft) west of
the centerline of Dickman Road, and 0.30 m (1 ft) below the level of the road.



                         BENCH MARK STAMPING:  6539 C 1977
                         DESIGNATION:          872 6539 C TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         6554
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  AG7598
SETTING CLASSIFICATION:  Concrete bridge abutment              OPUS PID:        
LATITUDE:   27° 46.9' N (  27.78170)          LONGITUDE:  82° 24.0' W ( -82.40000)


The bench mark is a disk set in the bridge abutment at the SE corner of the
bridge over Newman Branch Creek, 22.86 m (75.0 ft) SE of bench mark 6539 B 1977,
6.10 m (20.0 ft) east of the centerline of Dickman Road, 0.67 m (2.2 ft) east of
the SE corner of the bridge, and 0.30 m (1 ft) below the level of the road.

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

                                                                                
Station ID: 8726539                         PUBLICATION DATE:  03/16/2011
Name:       NEWMAN BRANCH                                     
            FL
NOAA Chart: 11413                           Latitude:   27° 47.0' N (  27.78330)
USGS Quad:  GIBSONTON                       Longitude:  82° 24.4' W ( -82.40670)


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


                         BENCH MARK STAMPING:  6539 E 1977
                         DESIGNATION:          872 6539 E TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         6555
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  AG7599
SETTING CLASSIFICATION:  Concrete bridge abutment              OPUS PID#: AG7599
LATITUDE:   27° 46.7' N (  27.77830)          LONGITUDE:  82° 24.0' W ( -82.40000)


The bench mark is a disk set in the bridge abutment at the NW corner of a small
bridge over a canal, 0.5 km (0.3 mi) south of Newman Branch Creek, 18.59 m (61.0
ft) north of south end of the bridge over the canal, 6.10 m (20.0 ft) west of
the centerline of Dickman Road, 0.61 m (2.0 ft) west of the NW corner of bridge,
and 0.30 m (1 ft) below the level of the road.



                         BENCH MARK STAMPING:  6539 F 1977
                         DESIGNATION:          872 6539 F TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         6556
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  AG7600
SETTING CLASSIFICATION:  Concrete bridge abutment              OPUS PID#: AG7600
LATITUDE:   27° 46.7' N (  27.77830)          LONGITUDE:  82° 24.0' W ( -82.40000)


The bench mark is a disk set in the bridge abutment of the SE corner of a small
bridge over a canal, 0.5 km (0.3 mi) south of Newman Branch Creek, 22.86 m (75.0
ft) SE of bench mark 6539 E 1977, 6.10 m (20.0 ft) east of the centerline of
Dickman Road, 0.67 m (2.2 ft) east of the SE corner of the bridge, and 0.30 m (1
ft) below the level of the road.

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

                                                                                
Station ID: 8726539                         PUBLICATION DATE:  03/16/2011
Name:       NEWMAN BRANCH                                     
            FL
NOAA Chart: 11413                           Latitude:   27° 47.0' N (  27.78330)
USGS Quad:  GIBSONTON                       Longitude:  82° 24.4' W ( -82.40670)


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


                         BENCH MARK STAMPING:  V 694 2007
                         DESIGNATION:          V 694

MONUMENTATION:           Bench Mark disk                       VM#:        19845
AGENCY:                  Florida Dept. of Environmental
                         Protection (FLDEP)                    IDB PID#:  DL1725
SETTING CLASSIFICATION:  Round concrete monument               OPUS PID:        
LATITUDE:   27° 46.5' N (  27.77458)          LONGITUDE:  82° 24.1' W ( -82.40097)


The bench mark is a disk set in the top of a round concrete monument flush with
the ground and level with Dickman Road, located 24.78 m (81.3 ft) north of the
centerline of Apollo Beach Boulevard westbound lanes, 22.62 m (74.2 ft) south of
the approximate centerline of the SE entrance to the Apollo Beach Elementary
School, 14.78 m (48.5 ft) west of the centerline of Dickman Road, 3.57 m (11.7
ft) south of a square concrete power pole #131798 (27027, 35082) with 7 guy
wires and one light attached, 0.67 m (2.2 ft) west of a carsonite witness post,
and 0.18 m (0.6 ft) east of the east side of the side walk.  NOTE: A magnet was
imbedded in the ground on the east side of the monument.

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

                                                                                
Station ID: 8726539                         PUBLICATION DATE:  03/16/2011
Name:       NEWMAN BRANCH                                     
            FL
NOAA Chart: 11413                           Latitude:   27° 47.0' N (  27.78330)
USGS Quad:  GIBSONTON                       Longitude:  82° 24.4' W ( -82.40670)


                            T I D A L   D A T U M S 


Tidal datums at NEWMAN BRANCH based on:

     LENGTH OF SERIES:      6 MONTHS
     TIME PERIOD:           April 1977 - September 1977
     TIDAL EPOCH:           1983-2001
     CONTROL TIDE STATION:  8726520 ST. PETERSBURG, TAMPA BAY


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

     MEAN HIGHER HIGH WATER                     MHHW   =  0.795
     MEAN HIGH WATER                            MHW    =  0.704
     North American Vertical Datum              NAVD88 =  0.509
     MEAN SEA LEVEL                             MSL    =  0.426
     MEAN TIDE LEVEL                            MTL    =  0.416
     MEAN LOW WATER                             MLW    =  0.129
     MEAN LOWER LOW WATER                       MLLW   =  0.000

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     6539 A 1977                                 0.932    0.228
     6539 B 1977                                 3.005    2.301
     6539 C 1977                                 3.010    2.306
     6539 E 1977                                 3.013    2.309
     6539 F 1977                                 3.033    2.329
     V 694 2007                                  2.270    1.566


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 mark V 694 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  6 of  6

                                                                                
Station ID: 8726539                         PUBLICATION DATE:  03/16/2011
Name:       NEWMAN BRANCH                                     
            FL
NOAA Chart: 11413                           Latitude:   27° 47.0' N (  27.78330)
USGS Quad:  GIBSONTON                       Longitude:  82° 24.4' W ( -82.40670)


                             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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