Bench Mark Sheet for 8722371, SEWALL POINT. ST. LUCIE RIVER 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Superseded Epoch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Small blue map location marker Unpublished bench mark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  8

                                                                                
Station ID: 8722371                         PUBLICATION DATE:  07/31/2009
Name:       SEWALL POINT. ST. LUCIE RIVER                     
            FL
NOAA Chart: 11474                           Latitude:   27° 10.5' N (  27.17500)
USGS Quad:  ST. LUCIE INLET                 Longitude:  80° 11.3' W ( -80.18830)


To reach the tidal bench marks from the courthouse on State Highway A1A in
Stuart, proceed 5.3 km (3.3 mi) east on State Highway A1A (East Ocean Boulevard)
to the community of Sewall Point, turn right at the Sewall Point Road
intersection and proceed 3.4 km (2.1 mi) south on Sewall Point Road to the
residence of Mr. A. R. Moyer, Jr.  The bench marks are near the residences of A.
R. Moyer, Harold Hock, and W. J. Fields. The tide gage and staff were located on
the Indian River, on the Moyer pier.  


                         T I D A L   B E N C H   M A R K S
                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  2 of  8

                                                                                
Station ID: 8722371                         PUBLICATION DATE:  07/31/2009
Name:       SEWALL POINT. ST. LUCIE RIVER                     
            FL
NOAA Chart: 11474                           Latitude:   27° 10.5' N (  27.17500)
USGS Quad:  ST. LUCIE INLET                 Longitude:  80° 11.3' W ( -80.18830)


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


                 PRIMARY BENCH MARK STAMPING:  SEAWALL USE 1898 NO 5 1969
                         DESIGNATION:          SEAWALL RM 5

MONUMENTATION:           Bench Mark disk                       VM#:         5448
AGENCY:                  US Coast and Geodetic Survey
                         (USC&GS)                              IDB PID#:  AF3181
SETTING CLASSIFICATION:  Concrete Monument                     OPUS PID:        
LATITUDE:   27° 10.4' N (  27.17333)          LONGITUDE:  80° 11.3' W ( -80.18830)


The primary bench mark is a disk set flush in the top of a concrete post, inch
below the level of the ground, located 37.00 m (121.4 ft) NE of the station mark
described, 12.62 m (41.4 ft) SE of the NW corner of a brick residence, 9.20 m
(30.2 ft) NW of the SE corner of the house, 2.13 m (7.0 ft) north of a 12-inch
palm tree, 0.30 m (1.0 ft) below the base of the house.  

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  3 of  8

                                                                                
Station ID: 8722371                         PUBLICATION DATE:  07/31/2009
Name:       SEWALL POINT. ST. LUCIE RIVER                     
            FL
NOAA Chart: 11474                           Latitude:   27° 10.5' N (  27.17500)
USGS Quad:  ST. LUCIE INLET                 Longitude:  80° 11.3' W ( -80.18830)


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


                         BENCH MARK STAMPING:  SEAWALL  USE 1898 NO 4 1969
                         DESIGNATION:          SEAWALL RM 4

MONUMENTATION:           Bench Mark disk                       VM#:         5447
AGENCY:                  US Coast and Geodetic Survey
                         (USC&GS)                              IDB PID#:  AF3134
SETTING CLASSIFICATION:  Concrete Monument                     OPUS PID:        
LATITUDE:   27° 10.4' N (  27.17333)          LONGITUDE:  80° 11.4' W ( -80.19000)


The bench mark is a disk set flush in the top of a concrete post one inch below
the level of the ground, located 27.95 m (91.7 ft) SW of the station mark
described, 17.50 m (57.4 ft) SW of the SW corner of a brick residence, 2.44 m
(8.0 ft) North of the NW one of a clump of several palm trees, 0.34 m (1.1 ft)
north of a metal witness post, and 1.83 m (6.0 ft) below the top of the ridge.



                         BENCH MARK STAMPING:  NO 1 A 1969
                         DESIGNATION:          872 2371 NO 1 A 1969

MONUMENTATION:           Survey disk                           VM#:         5450
AGENCY:                  USC&GS                                IDB PID#:  AF3182
SETTING CLASSIFICATION:  Patio                                 OPUS PID:        
LATITUDE:   27° 10.5' N (  27.17500)          LONGITUDE:  80° 11.3' W ( -80.18830)


DESTROYED OR NOT RECOVERED ON 01/01/1986  The bench mark is a disk set flush in
a drill hole in the Moyer front patio, which faces the river, at the north end
of the southernmost sliding-glass door, 6 m (20 ft) NW of a 0.30 m (1.0 ft)
diameter palm tree, 4.72 m (15.5 ft) NW of the SE corner of the residence, and
0.30 m (1.0 ft) east of the residence.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  4 of  8

                                                                                
Station ID: 8722371                         PUBLICATION DATE:  07/31/2009
Name:       SEWALL POINT. ST. LUCIE RIVER                     
            FL
NOAA Chart: 11474                           Latitude:   27° 10.5' N (  27.17500)
USGS Quad:  ST. LUCIE INLET                 Longitude:  80° 11.3' W ( -80.18830)


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


                         BENCH MARK STAMPING:  B 306 1970
                         DESIGNATION:          B 306

MONUMENTATION:           Bench Mark disk                       VM#:         5452
AGENCY:                  US Coast and Geodetic Survey
                         (USC&GS)                              IDB PID#:  AF3184
SETTING CLASSIFICATION:  Concrete bulkhead                     OPUS PID:        
LATITUDE:   27° 10.8' N (  27.18000)          LONGITUDE:  80° 11.2' W ( -80.18670)


The bench mark is a disk set in the top of a concrete bulkhead, 0.3 km (0.2 mi)
north of bench mark NO 2A RESET 1984, 19.20 m (63.0 ft) east of the centerline
of Sewall Point Road, 11 m (36 ft) NW of the NW corner of a bridge over a canal,
6.40 m (21.0 ft) north of the centerline of a road leading east, and 0.3 m (1
ft) NE of the SW corner of the bulkhead.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  5 of  8

                                                                                
Station ID: 8722371                         PUBLICATION DATE:  07/31/2009
Name:       SEWALL POINT. ST. LUCIE RIVER                     
            FL
NOAA Chart: 11474                           Latitude:   27° 10.5' N (  27.17500)
USGS Quad:  ST. LUCIE INLET                 Longitude:  80° 11.3' W ( -80.18830)


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


                         BENCH MARK STAMPING:  SEAWALL USE 1934 1898
                         DESIGNATION:          SEAWALL RESET

MONUMENTATION:           Bench Mark disk                       VM#:        15813
AGENCY:                  US Coast and Geodetic Survey
                         (USC&GS)                              IDB PID#:  AF3135
SETTING CLASSIFICATION:  Concrete Monument                     OPUS PID:        
LATITUDE:   27° 10.4' N (  27.17330)          LONGITUDE:  80° 11.4' W ( -80.19000)


The bench mark is a disk set flush in the top of a 0.30 m (1.0 ft) in diameter
concrete post located in the south, rear, lawn of the Fields residence, on the
SE side of the swimming pool, 14.60 m (47.9 ft) south of the SW corner of a
screened porch, 9.81 m (32.2 ft) WSW of a flag pole, 5.70 m (18.7 ft) east of
the East edge of a walkway around the pool, and 3.99 m (13.1 ft) north of the
edge of a steep bluff, and 0.06 m (0.2 ft) above the ground surface.    Note:
The owner must be notified before work.  Allow 0.5 hour extra time for contact
and setup.  

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  6 of  8

                                                                                
Station ID: 8722371                         PUBLICATION DATE:  07/31/2009
Name:       SEWALL POINT. ST. LUCIE RIVER                     
            FL
NOAA Chart: 11474                           Latitude:   27° 10.5' N (  27.17500)
USGS Quad:  ST. LUCIE INLET                 Longitude:  80° 11.3' W ( -80.18830)


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


                         BENCH MARK STAMPING:  Q 236 1965
                         DESIGNATION:          Q 236

MONUMENTATION:           Bench Mark disk                       VM#:        18903
AGENCY:                  US Coast and Geodetic Survey
                         (USC&GS)                              IDB PID#:  AF3126
SETTING CLASSIFICATION:  Concrete Monument                     OPUS PID:        
LATITUDE:   27° 11.5' N (  27.19167)          LONGITUDE:  80° 11.7' W ( -80.19500)


The bench mark is a disk set in the top of a concrete post projection four
inches above the level of the ground, 12.19 m (40.0 ft) NE of the approximate
center  of the junction, 7.62 m (25.0 ft) east of the center line of the road,
5.18 m (17.0 ft) north of the extended center line of the road leading west,
0.61 m (2.0 ft) south of a power line pole, 0.49 m (1.6 ft) north of a metal
witness post and about level with the road.



                         BENCH MARK STAMPING:  NO 1 A RESET 1984
                         DESIGNATION:          872 2371 TIDAL 1 A RESET

MONUMENTATION:           Tidal Station disk                    VM#:        18904
AGENCY:                  National Geodetic Survey (NGS)        IDB PID#:  AF7402
SETTING CLASSIFICATION:  Concrete Monument                     OPUS PID:        
LATITUDE:   27° 10.5' N (  27.17500)          LONGITUDE:  80° 11.3' W ( -80.18833)


The bench mark is a disk set flush with the ground and level with the surface of
the sewall point road, located 7.56 m (24.8 ft) east of the approximate
centerline of Sewall Point Road, 6.61 m (21 7 ft) north of the approximate
centerline of the driveway to house number 24, 4.51 m (14.8 ft) SE of a NGS
vertical control mark NO 2 A RESET 1984, 1.9 m (6.3 ft) east of a Bell South
telephone junction post and 0.30 m (1.0 ft) east of a carsonite witness post.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  7 of  8

                                                                                
Station ID: 8722371                         PUBLICATION DATE:  07/31/2009
Name:       SEWALL POINT. ST. LUCIE RIVER                     
            FL
NOAA Chart: 11474                           Latitude:   27° 10.5' N (  27.17500)
USGS Quad:  ST. LUCIE INLET                 Longitude:  80° 11.3' W ( -80.18830)


                            T I D A L   D A T U M S 


Tidal datums at SEWALL POINT. ST. LUCIE RIVER based on:

     LENGTH OF SERIES:      6 MONTHS
     TIME PERIOD:           May 1973 - October 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:

     North American Vertical Datum              NAVD88 =  0.493
     MEAN HIGHER HIGH WATER                     MHHW   =  0.299
     MEAN HIGH WATER                            MHW    =  0.273
     MEAN SEA LEVEL                             MSL    =  0.157
     MEAN TIDE LEVEL                            MTL    =  0.154
     MEAN LOW WATER                             MLW    =  0.034
     MEAN LOWER LOW WATER                       MLLW   =  0.000

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     SEAWALL USE 1898 NO 5 1969                 11.089   10.816
     SEAWALL  USE 1898 NO 4 1969                 9.871    9.598
     NO 1 A 1969                                 7.251    6.978
     B 306 1970                                  1.551    1.278
     SEAWALL USE 1934 1898                      11.112   10.839
     Q 236 1965                                  1.481    1.208
     NO 1 A RESET 1984                           7.861    7.588


Foot Notes:

Bench marks B 306 1970, NO 1 A RESET 1984, and Q 236 1965 are based on one
differential leveling connection anddo not meet the quality control standards of
the NOS.  Therefore, caution should be used when deriving elevations for these
marks.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  8 of  8

                                                                                
Station ID: 8722371                         PUBLICATION DATE:  07/31/2009
Name:       SEWALL POINT. ST. LUCIE RIVER                     
            FL
NOAA Chart: 11474                           Latitude:   27° 10.5' N (  27.17500)
USGS Quad:  ST. LUCIE INLET                 Longitude:  80° 11.3' W ( -80.18830)


                             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.

Return to Top
Products available at 8722371 SEWALL POINT. ST. LUCIE RIVER, FL