Superseded Bench Mark Sheet for 8722557, North Palm Beach FL

Present Epoch

Printable version

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

                                                   PUBLICATION DATE:  07/23/1987
Station ID: 8722557                                SUPERCEDED DATE:   04/21/2003
Name:       NORTH PALM BEACH, LAKE WORTH                      
            FLORIDA
NOAA Chart: 11466                                  Latitude:         26° 49.6' N
USGS Quad:  RIVIERA BEACH                          Longitude:        80°  3.3' W


To reach the tidal bench marks from the intersection of U.S. Highway 1 and Yacht
Club Drive in North Palm Beach [0.3 mile (0.5 km) south of the U.S. Highway 1
bridge over the Intracoastal Waterway], proceed east on Yacht Club Drive to the
Landings East Condominiums on Lake Worth.  The bench marks are located in the
vicinity of the condominiums, along Yacht Club Drive, and along U.S. Highway 1. 
The tide gage and staff were located on a dock behind the condominiums.


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


                 PRIMARY BENCH MARK STAMPING:  N 309 1970

MONUMENTATION:           Survey Disk                               VM#:     5592
AGENCY:                                                            PID#:  AD2896
SETTING CLASSIFICATION:  Concrete Bulkhead


The bench mark is set flush in a concrete bulkhead east of Landings East
Condominiums, 64.4 feet (19.6 m) south of the south edge of the center wooden
dock of three wooden docks, and 35.3 feet (10.8 m) ESE of the SE corner of 
Landings East Condominiums.



                         BENCH MARK STAMPING:  L 309 1970

MONUMENTATION:           Survey Disk                               VM#:     5590
AGENCY:                                                            PID#:  AD2899
SETTING CLASSIFICATION:  Unspecified Rod


The bench mark is in the SW corner of the yard of Landings East Condominiums,
56.5 feet (17.2 m) west of the SW corner of the swimming pool, 41 feet (12 m)
south of the centerline of the driveway, 36 feet (11 m) east of Yacht Club
Drive, 4.9 feet (1.5 m) east of the west end of the hedges, and 0.8 foot (0.2 m)
north of the north face of the hedges.  The bench mark is 1 foot (0.3 m) above
ground level, crimped t[-o an unspecified rod.

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

                                                   PUBLICATION DATE:  07/23/1987
Station ID: 8722557                                SUPERCEDED DATE:   04/21/2003
Name:       NORTH PALM BEACH, LAKE WORTH                      
            FLORIDA
NOAA Chart: 11466                                  Latitude:         26° 49.6' N
USGS Quad:  RIVIERA BEACH                          Longitude:        80°  3.3' W


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


                         BENCH MARK STAMPING:  M 309 1970

MONUMENTATION:           Survey Disk                               VM#:     5591
AGENCY:                                                            PID#:  AD2900
SETTING CLASSIFICATION:  Wall


The bench mark is set flush in the top of a wall surrounding the steps leading
to an underground pumphouse for the pool, 56.5 feet (17.2 m) NE of Bench Mark L
309 1970, 16 feet (5 m) NW of the NW corner of the swimming pool, and level with
the parking lot.



                         BENCH MARK STAMPING:  P 309 1970

MONUMENTATION:           Survey Disk                               VM#:     5593
AGENCY:                                                            PID#:  AD2901
SETTING CLASSIFICATION:  Concrete Bulkhead


The bench mark is set flush in the center of the curve of a concrete bulkhead,
73 feet (22 m) NE of the NE corner of Landings East Condominiums, and at ground
level.



                         BENCH MARK STAMPING:  Q 309 1970

MONUMENTATION:           Survey Disk                               VM#:     5594
AGENCY:                                                            PID#:  AD2895
SETTING CLASSIFICATION:  Concrete Catch Basin


The bench mark is set flush in the NE corner of a 3x3-foot (1x1 m) concrete
catch basin located 84 feet (26 m) SE of the SE corner of a large yacht basin,
33 feet (10 m) east of the centerline of a driveway, 20 feet (6 m) north of the
centerline of Yacht Club Drive, 5.7 feet (1.7 m) south of the south edge of a
sidewalk, and 0.5 foot (0.2 m) below road level.

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

                                                   PUBLICATION DATE:  07/23/1987
Station ID: 8722557                                SUPERCEDED DATE:   04/21/2003
Name:       NORTH PALM BEACH, LAKE WORTH                      
            FLORIDA
NOAA Chart: 11466                                  Latitude:         26° 49.6' N
USGS Quad:  RIVIERA BEACH                          Longitude:        80°  3.3' W


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


                         BENCH MARK STAMPING:  29.591

MONUMENTATION:           Survey Disk                               VM#:     5595
AGENCY:                                                            PID#:  AD2897
SETTING CLASSIFICATION:  Concrete Bridge Abutment


The bench mark is set flush in the east end of the south concrete abutment for
the U.S. Highway 1 bridge over the Intercoastal Waterway, 18 feet (5 m) east of
the centerline of the northbound highway lane, and 1 foot (0.3 m) above  highway
level.

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

                                                   PUBLICATION DATE:  07/23/1987
Station ID: 8722557                                SUPERCEDED DATE:   04/21/2003
Name:       NORTH PALM BEACH, LAKE WORTH                      
            FLORIDA
NOAA Chart: 11466                                  Latitude:         26° 49.6' N
USGS Quad:  RIVIERA BEACH                          Longitude:        80°  3.3' W


                            T I D A L   D A T U M S 


Tidal datums at NORTH PALM BEACH, LAKE WORTH based on:

     LENGTH OF SERIES:      24 MONTHS
     TIME PERIOD:           MARCH 1971-FEBRUARY 1973
     TIDAL EPOCH:           1960-1978
     CONTROL TIDE STATION:  8723170 MIAMI BEACH


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

     HIGHEST OBSERVED WATER LEVEL (10/25/1973)         =   5.14
     MEAN HIGHER HIGH WATER                     MHHW   =   3.26
     MEAN HIGH WATER                            MHW    =   3.06
     MEAN TIDE LEVEL                            MTL    =   1.63
   * NATIONAL GEODETIC VERTICAL DATUM           NGVD29 =   1.30
     MEAN LOW WATER                             MLW    =   0.19
     MEAN LOWER LOW WATER                       MLLW   =   0.00
     LOWEST  OBSERVED WATER LEVEL (05/22/1971)         =  -1.31

   * NGVD is based on elevations published in Quad 260801, February 1972 and NOS
     leveling of 1981. 
North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In FEET above:

     Stamping or Designation                    MLLW        MHW

     N 309 1970                                  6.82      3.76
     L 309 1970                                  7.88      4.82
     M 309 1970                                  8.81      5.75
     P 309 1970                                  6.85      3.79
     Q 309 1970                                  6.66      3.60
     29.591                                     30.90     27.84


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

                                                   PUBLICATION DATE:  07/23/1987
Station ID: 8722557                                SUPERCEDED DATE:   04/21/2003
Name:       NORTH PALM BEACH, LAKE WORTH                      
            FLORIDA
NOAA Chart: 11466                                  Latitude:         26° 49.6' N
USGS Quad:  RIVIERA BEACH                          Longitude:        80°  3.3' 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.

Return to Top
Products available at 8722557 North Palm Beach, FL