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Bench Mark Sheet for 8722761, SOUTH DELRAY 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Superseded Epoch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Small blue map location marker Unpublished bench mark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.

Error: There is no bench mark map available for 8722761 SOUTH DELRAY BEACH, FL
Printable version

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
Datums Page                                                        Page  1 of  5

                                                                                
Station ID: 8722761                                PUBLICATION DATE:  12/08/2010
Name:       SOUTH DELRAY BEACH                                
            FLORIDA
NOAA Chart: 11466                                  Latitude:         26° 26.8' N
USGS Quad:  DELRAY BEACH                           Longitude:        80°  3.9' W


To reach the tidal bench marks from the intersection of U.S. Highway 1 and State
Highway S-806 (Atlantic Avenue) in Delray Beach, proceed south on U.S. Highway 1
for  km (1.2 mi) to a U-turn loop to U.S. Highway 1 north (one-way), go north on
U.S. Highway 1 for  km (0.1 mi) to the Delray Harbor Club Apartments (1035 S.
Federal Highway).  The bench marks are in the area around the marina. The tide
gage and staff were on the Delray Harbor Club Apartments pier.  


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


                 PRIMARY BENCH MARK STAMPING:  NO 1 1973
                         DESIGNATION:          872 2761 TIDAL 1

MONUMENTATION:           Tidal Station disk                        VM#:     5632
AGENCY:                  National Ocean Survey (NOS)               PID#:  AD5823
SETTING CLASSIFICATION:  Concrete sea wall


The primary bench mark is a disk located (66.3 ft) SSW of the SW corner of the
Del Mar Marina yard office, (60.0 ft) west of the east edge of the sea wall
along the Intracoastal Waterway, and (1.3 ft) east of the west end of the
southernmost sea wall at the marina.



                         BENCH MARK STAMPING:  DELRAY S BASE 1934 1962
                         DESIGNATION:           DELRAY SOUTH BASE RESET

MONUMENTATION:           Triangulation Station disk                VM#:     5630
AGENCY:                  US Coast and Geodetic Survey (USC&GS)     PID#:  AD2687
SETTING CLASSIFICATION:  Concrete monument


The bench mark is a disk set into the top of a square concrete monument m (1.0
ft) in diameter, recessed m (1.0 ft) below the ground, located 16.5 m (54.0 ft)
north of the center of SE 10th Street,  15.1 m (49.5 ft) east of the east rail
of rail road track,  and m (2.8 ft) north of a metal witness post.    NOTE:  The
bench mark is (1.0 ft) west of a 6-foot high cyclone wire fence that is in a
7-foot high hedge row.  Due to location of station, it is impossible to occupy
station unless fence is cut.

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

                                                                                
Station ID: 8722761                                PUBLICATION DATE:  12/08/2010
Name:       SOUTH DELRAY BEACH                                
            FLORIDA
NOAA Chart: 11466                                  Latitude:         26° 26.8' N
USGS Quad:  DELRAY BEACH                           Longitude:        80°  3.9' W


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


                         BENCH MARK STAMPING:  NO 2 1973
                         DESIGNATION:          872 2761 TIDAL 2

MONUMENTATION:           Tidal Station disk                        VM#:     5633
AGENCY:                  National Ocean Survey (NOS)               PID#:  AD5822
SETTING CLASSIFICATION:  Concrete sea wall


The bench mark is a disk set flush in the concrete sea wall, 19.8 m (65.0 ft)
north of bench mark NO 1 1973, (32.8 ft) west of the east edge of the sea wall
at the Intracoastal Waterway,  7.0 m (23.0 ft) north of the NW corner of the
swimming pool, and  m (4.9 ft) SW of the SW corner of the dock-house office.  



                         BENCH MARK STAMPING:  NO 3 1973
                         DESIGNATION:          872 2761 TIDAL 3

MONUMENTATION:           Tidal Station disk                        VM#:     5634
AGENCY:                  National Ocean Survey (NOS)               PID#:  AD5821
SETTING CLASSIFICATION:  Concrete sea wall


The bench mark is a disk set flush in the concrete sea wall, 29.8 m (98.0 ft)
west of the SW corner of the dock house, 28.65 m (94.0 ft) west of Bench Mark NO
2 1973, and 5.2 m (17.0 ft) NNE of the NW corner of the cabana building.  



                         BENCH MARK STAMPING:  NO 5 1973
                         DESIGNATION:          872 2761TIDAL 5

MONUMENTATION:           Tidal Station disk                        VM#:     5636
AGENCY:                  National Ocean Survey (NOS)               PID#:  AD5819
SETTING CLASSIFICATION:  Concrete sea wall


The bench mark is a disk set flush in the top of the south boat lift wall, (1.5
ft) west of the east end of the wall and (1.0 ft) north of the main sea wall,
located 12.80 m (42 ft) north of bench mark NO 4 1973, and 1.5 m (5 ft) north of
the NE corner of the south wing of the Delray Harbor Club Apartments.  

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

                                                                                
Station ID: 8722761                                PUBLICATION DATE:  12/08/2010
Name:       SOUTH DELRAY BEACH                                
            FLORIDA
NOAA Chart: 11466                                  Latitude:         26° 26.8' N
USGS Quad:  DELRAY BEACH                           Longitude:        80°  3.9' W


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


                         BENCH MARK STAMPING:  B 234 1965
                         DESIGNATION:          B 234

MONUMENTATION:           Bench Mark disk                           VM#:    18780
AGENCY:                  US Coast and Geodetic Survey (USC&GS)     PID#:  AD2682
SETTING CLASSIFICATION:  Concrete Post


The bench mark is a disk located 13.90 m (45.6 ft) east of railroad milepost
319,  8.30 m (27.2 ft) west of and level with the centerline of Dixie Highway, 
8.7 m (28.5 ft) east of the near rail, 0.48 m (1.6 ft) north of a witness post,
and the monument is flush with the ground surface.  

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

                                                                                
Station ID: 8722761                                PUBLICATION DATE:  12/08/2010
Name:       SOUTH DELRAY BEACH                                
            FLORIDA
NOAA Chart: 11466                                  Latitude:         26° 26.8' N
USGS Quad:  DELRAY BEACH                           Longitude:        80°  3.9' W


                            T I D A L   D A T U M S 


Tidal datums at SOUTH DELRAY BEACH based on:

     LENGTH OF SERIES:      1 MONTH
     TIME PERIOD:           April 1973 - April 1973
     TIDAL EPOCH:           1983-2001
     CONTROL TIDE STATION:  8723170 MIAMI BEACH (CITY PIER)


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

     MEAN HIGHER HIGH WATER                     MHHW   =  0.808
     MEAN HIGH WATER                            MHW    =  0.769
     North American Vertical Datum              NAVD88 =  0.681
     MEAN TIDE LEVEL                            MTL    =  0.408
     MEAN SEA LEVEL                             MSL    =  0.386
     MEAN LOW WATER                             MLW    =  0.047
     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 1973                                   2.176    1.407
     DELRAY S BASE 1934 1962                     5.604    4.835
     NO 2 1973                                   2.178    1.409
     NO 3 1973                                   2.179    1.410
     NO 5 1973                                   2.161    1.392
     B 234 1965                                  6.242    5.473


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 marks B 234 1965 and DELRAY S BASE 1934
1962 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  5 of  5

                                                                                
Station ID: 8722761                                PUBLICATION DATE:  12/08/2010
Name:       SOUTH DELRAY BEACH                                
            FLORIDA
NOAA Chart: 11466                                  Latitude:         26° 26.8' N
USGS Quad:  DELRAY BEACH                           Longitude:        80°  3.9' W


                             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 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 8722761 SOUTH DELRAY BEACH, FL

Revised: 10/15/2013
NOAA / National Ocean Service
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