Superseded Bench Mark Sheet for 8720587, St. Augustine Beach FL

Present Epoch

Printable version

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
Datums Page                                                        Page  1 of  7

                                                   PUBLICATION DATE:  06/27/2001
Station ID: 8720587                                SUPERCEDED DATE:   04/21/2003
Name:       ST. AUGUSTINE BEACH, ATLANTIC OCEAN               
            FLORIDA
NOAA Chart: 11486                                  Latitude:         29° 51.4' N
USGS Quad:  ST AUGUSTINE BEACH                     Longitude:        81° 15.8' W


To reach the tidal bench marks from the intersection of State Highway A1A and
Anastasia Boulevard in St. Augustine Beach, proceed south on State Highway A1A
for 0.3 km (0.2 mile) to the St. Johns County Municipal Fishing Pier.  The bench
marks are located in the vicinity of the pier and along Highway A1A.  The tide
gauge is located near the seaward end of the pier.


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


                 PRIMARY BENCH MARK STAMPING:  D 322 1970
                         DESIGNATION:          D 322

MONUMENTATION:           Bench Mark disk                           VM#:     5216
AGENCY:                  US Coast and Geodetic Survey (USC&GS)     PID#:  AQ0346
SETTING CLASSIFICATION:  Concrete monument


The primary bench mark is a disk set in a concrete monument north of the bait
shop at the St. Johns County Municipal Fishing Pier, near the east end of a
grass median in the parking lot, 21.00 m (68.9 ft) NW of the NW corner of the
pier, 13.01 M (42.7 ft) east of a utility pole, 10.49 m (34.4 ft) north of the
road center, 7.99 m (26.2 ft) west of the east end of the median, 1.58 m (5.2
ft) south of the north curb of the median, 1.49 m (4.9 ft) north of the south
curb of the midian, 0.30 m (1.0 ft) above the level of the road, and at ground
level.       



                         BENCH MARK STAMPING:  0587 E 1993
                         DESIGNATION:          872 0587 E

MONUMENTATION:           Tidal Station disk                        VM#:       85
AGENCY:                  National Ocean Service (NOS)              PID:         
SETTING CLASSIFICATION:  Stainless steel rod


The bench mark is a disk located at the entrance to the St. Johns County
Municipal Fishing Pier parking lot, 18.75 m (61.5 ft) east of the centerline of
State Highway A1A, 9.80 m (32.1 ft) north of the centerline of the most
northerly entrance to the pier parking lot, and 12.20 (40.0 ft) NW of the center
of a drain in the parking lot.  The bench mark is crimped to a stainless steel
rod driven 8.5 m (28 ft) to refusal, and encased in a five-inch diameter PVC
pipe and concrete kickblock.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  2 of  7

                                                   PUBLICATION DATE:  06/27/2001
Station ID: 8720587                                SUPERCEDED DATE:   04/21/2003
Name:       ST. AUGUSTINE BEACH, ATLANTIC OCEAN               
            FLORIDA
NOAA Chart: 11486                                  Latitude:         29° 51.4' N
USGS Quad:  ST AUGUSTINE BEACH                     Longitude:        81° 15.8' W


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


                         BENCH MARK STAMPING:  H 322 1970
                         DESIGNATION:          H 322

MONUMENTATION:           Survey disk                               VM#:     5212
AGENCY:                  US Army Corps of Engineers (USE)          PID#:  AQ0345
SETTING CLASSIFICATION:  Concrete monument


The bench mark is a disk set in a concrete monument 0.24 km (0.15 mi) north
along State Highway A1A from the St. Augustine Beach Fire Station, near the
intersection of Highway A1A and Pope Road, 14.90 m (48.9 ft) west of the
centerline of Highway A1A, 15.00 m (49.2ft) south of the centerline of Pope
Road, 15.01 m (49.2 ft) west of the centerline of Highway A1A, 12.70 m (41.7 ft)
NE of the corner of a deck on the house at A 301, 1.94 m (6.4 ft) south of a
utility pole, 0.30 m (1.0 ft) below the level of the highway, and 0.09 m (0.3
ft) above ground level.  NOTE: the number 1939 is precast in the disk.



                         BENCH MARK STAMPING:  C 322 1970
                         DESIGNATION:          C 322

MONUMENTATION:           Bench Mark disk                           VM#:     5215
AGENCY:                  US Coast and Geodetic Survey (USC&GS)     PID#:  AQ0347
SETTING CLASSIFICATION:  Concrete monument


The bench mark is a disk in St. Augustine Beach at No. 370 South A1A, 40.10 m
(131.6 ft) east of and level with the highway centerline, 7.40 m (24.3 ft) NE of
the NE corner of a fire station at No. 370 South A1A, 6.60 m (21.7 ft) NW of the
NW corner of the Fire Station garage, 0.6 m (2.0 ft) south of a utility light
pole, and at ground level.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  3 of  7

                                                   PUBLICATION DATE:  06/27/2001
Station ID: 8720587                                SUPERCEDED DATE:   04/21/2003
Name:       ST. AUGUSTINE BEACH, ATLANTIC OCEAN               
            FLORIDA
NOAA Chart: 11486                                  Latitude:         29° 51.4' N
USGS Quad:  ST AUGUSTINE BEACH                     Longitude:        81° 15.8' W


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


                         BENCH MARK STAMPING:  R-142 RESET 1995
                         DESIGNATION:          872 0587 R-142 RESET

MONUMENTATION:           Survey disk                               VM#:    13349
AGENCY:                  US Army Corps of Engineers (USE)          PID:         
SETTING CLASSIFICATION:  Concrete monument


The bench mark is a disk set in a concrete monument, near the foot of the St.
Johns County Municipal Fishing Pier, on the south side of the pier, 29.41 m
(96.5 ft) east of the east face of the pier house, 7.99 m (26.2 ft) west of the
west side of a concrete seawall, 1.98 m (6.5 ft) south of the south side of the
pier, and at ground level.



                         BENCH MARK STAMPING:  0587 F 1997
                         DESIGNATION:          872 0587  F

MONUMENTATION:           Flange-encased Rod                        VM#:    13702
AGENCY:                  National Ocean Service (NOS)              PID:         
SETTING CLASSIFICATION:  Stainless steel rod in sleeve


The bench mark is a flange-encased rod set near the St. Johns County Municipal
Pier in the SE corner of the parking lot, 26.70 m (87.6 ft) SSW of the SW corner
of the bathrooms for the pier, 26.70 m (87.6 ft) NW of the NW corner of the City
Office Building, 26.20 m (86.0 ft) ESE of a cement power pole No. 1156, and
10.15 m (33.3 ft) NNE of a cement power pole No. 1254.  The datum point is the
top of a stainless steel rod driven 18.1 m (59 ft) to refusal, encased in a
grease-filled sleeve and 5-inch NOS logo cap.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  4 of  7

                                                   PUBLICATION DATE:  06/27/2001
Station ID: 8720587                                SUPERCEDED DATE:   04/21/2003
Name:       ST. AUGUSTINE BEACH, ATLANTIC OCEAN               
            FLORIDA
NOAA Chart: 11486                                  Latitude:         29° 51.4' N
USGS Quad:  ST AUGUSTINE BEACH                     Longitude:        81° 15.8' W


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


                         BENCH MARK STAMPING:  0587 G 1997
                         DESIGNATION:          872 0587 G

MONUMENTATION:           Flange-encased Rod                        VM#:    13703
AGENCY:                  National Ocean Service (NOS)              PID:         
SETTING CLASSIFICATION:  Stainless steel rod in sleeve


The bench mark is a flange-encased rod set near the intersection of Highway A1A
and 15th Street in St. Augustine Beach, 32.45 m (106.5 ft) south of the sign for
Better Homes Realty, 28.80 m (94.5 ft) west of a telephone pole with transformer
on 15th Street, 12.30 m (40.6 ft) east of the centerline of Highway A1A, and
5.80 m (19.0 ft) north of the centerline of 15th Street.  The datum point is the
top of  a stainless steel rod driven 15.5 m (51 ft) to refusal, encased in a
grease-filled sleeve and 5-inch NOS logo cap.



                         BENCH MARK STAMPING:  R 141 R 19 1972
                         DESIGNATION:          872 0587 R 141

MONUMENTATION:           Bench Mark disk                           VM#:    13952
AGENCY:                  Florida Dept. of Natural Resources (FDNR) PID:         
SETTING CLASSIFICATION:  Stainless steel rod


The bench mark is a disk near the intersection of Popes Street and Highway A1A
at a curve in the road, 42.98 m  (141.0 ft) north of the centerline of an access
road next to the Howard Johnson Hotel, 27.65 m (90.7 ft) south of the center of
a metal gate for access to the beach, 15.21 m (49.9 ft) east of the centerline
of Highway A1A,  0.88 m (2.9 ft) east of a metal post, and just west of a metal
witness post.  The bench mark is about 0.3 m (1 ft) below ground level in a
depression, set on top of a metal rod driven an unspecified depth.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  5 of  7

                                                   PUBLICATION DATE:  06/27/2001
Station ID: 8720587                                SUPERCEDED DATE:   04/21/2003
Name:       ST. AUGUSTINE BEACH, ATLANTIC OCEAN               
            FLORIDA
NOAA Chart: 11486                                  Latitude:         29° 51.4' N
USGS Quad:  ST AUGUSTINE BEACH                     Longitude:        81° 15.8' W


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


                         BENCH MARK STAMPING:  L 405 1991
                         DESIGNATION:          L 405

MONUMENTATION:           Flange-encased Rod                        VM#:    13953
AGENCY:                  National Geodetic Survey (NGS)            PID#:  AQ2722
SETTING CLASSIFICATION:  Stainless steel rod


The bench mark is a flange-encased rod at the intersection of State Highway A1A
and D Street in St. Augustine Beach, 13.6 m (44.6 ft) west of and level with the
Highway A1A, 4.51 m (14.8 ft) south of the centerline of D Street, and 0.49 m
(1.6 ft) east of utility light pole No. 345.  The datum point is 15 cm (0.5 ft)
below ground level, being the top of a stainless steel rod driven 21.7 m (71
ft), and encased in a 5-inch NGS logo cap.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  6 of  7

                                                   PUBLICATION DATE:  06/27/2001
Station ID: 8720587                                SUPERCEDED DATE:   04/21/2003
Name:       ST. AUGUSTINE BEACH, ATLANTIC OCEAN               
            FLORIDA
NOAA Chart: 11486                                  Latitude:         29° 51.4' N
USGS Quad:  ST AUGUSTINE BEACH                     Longitude:        81° 15.8' W


                            T I D A L   D A T U M S 


Tidal datums at ST. AUGUSTINE BEACH, ATLANTIC OCEAN based on:

     LENGTH OF SERIES:      84 MONTHS
     TIME PERIOD:           June 1992 - September 1999
     TIDAL EPOCH:           1960-1978
     CONTROL TIDE STATION:  8720220 MAYPORT


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

     HIGHEST OBSERVED WATER LEVEL (09/24/1992)         =  2.422
     MEAN HIGHER HIGH WATER                     MHHW   =  1.587
     MEAN HIGH WATER                            MHW    =  1.476
     North American Vertical Datum              NAVD88 =  1.028
     MEAN TIDE LEVEL                            MTL    =  0.764
     MEAN SEA LEVEL                             MSL    =  0.756
     MEAN LOW WATER                             MLW    =  0.053
     MEAN LOWER LOW WATER                       MLLW   =  0.000
     LOWEST  OBSERVED WATER LEVEL (03/03/1993)         = -0.915

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     D 322 1970                                  4.102    2.626
     0587 E 1993                                 3.228    1.752
     H 322 1970                                  2.790    1.314
     C 322 1970                                  3.317    1.841
     R-142 RESET 1995                            4.350    2.874
     0587 F 1997                                 4.090    2.614
     0587 G 1997                                 2.844    1.368
     R 141 R 19 1972                             3.254    1.778
     L 405 1991                                  3.393    1.917


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

                                                   PUBLICATION DATE:  06/27/2001
Station ID: 8720587                                SUPERCEDED DATE:   04/21/2003
Name:       ST. AUGUSTINE BEACH, ATLANTIC OCEAN               
            FLORIDA
NOAA Chart: 11486                                  Latitude:         29° 51.4' N
USGS Quad:  ST AUGUSTINE BEACH                     Longitude:        81° 15.8' 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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