U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
Datums Page                                                        Page  1 of  6

                                                   PUBLICATION DATE:  09/22/1987
Station ID: 8720576                                SUPERCEDED DATE:   04/21/2003
Name:       ST. AUGUSTINE, INTRACOASTAL WATERWAY, MATANZAS RIV
            FLORIDA
NOAA Chart: 11488                                  Latitude:         29° 53.5' N
USGS Quad:  ST.AUGUSTINE                           Longitude:        81° 18.6' W


To reach the tidal bench marks from the intersection of U.S. Highway 1 and King
Street in St. Augustine, proceed east on King Street for 0.8 mile (1.3 km) to
Avienda Menendez, then south on Avienda Menendez for 150 feet (46 m) to City
Yacht Pier.  The bench marks are located in the area around the pier and Bridge
of the Lions.  The tide gage and staff were located on City Yacht Pier.


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


                 PRIMARY BENCH MARK STAMPING:  12 1974

MONUMENTATION:           Survey Disk                               VM#:     5208
AGENCY:                                                            PID#:  AQ0276
SETTING CLASSIFICATION:  Concrete Monument


The bench mark is set flush in the top center of the 2-foot (1 m) thick seawall
at City Yacht Pier, 35 feet (11 m) east of the east side of the City Yacht Pier
building, 3 feet (1 m) north of the north side of the concrete deck and pier
rail, and 2 feet (1 m) below the concrete deck.



                         BENCH MARK STAMPING:  J 15 1932 7.608

MONUMENTATION:           Survey Disk                               VM#:     5203
AGENCY:                                                            PID#:  AQ0274
SETTING CLASSIFICATION:  Concrete Foundation


The bench mark is at the corner of King and Charlotte Streets, set vertically in
the north face and at the foot of the NE pillar near a bronze rectangular tablet
describing the old Slave Market building, 90 feet (27 m) west of the statue of
Juan Ponce de Leon in the park, 1 foot (0.3 m) west of the NE corner, and 2 feet
(1 m) above the level of the sidewalk.

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

                                                   PUBLICATION DATE:  09/22/1987
Station ID: 8720576                                SUPERCEDED DATE:   04/21/2003
Name:       ST. AUGUSTINE, INTRACOASTAL WATERWAY, MATANZAS RIV
            FLORIDA
NOAA Chart: 11488                                  Latitude:         29° 53.5' N
USGS Quad:  ST.AUGUSTINE                           Longitude:        81° 18.6' W


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


                         BENCH MARK STAMPING:  LIONS 1934

MONUMENTATION:           Survey Disk                               VM#:     5204
AGENCY:                                                            PID#:  AQ0271
SETTING CLASSIFICATION:  Concrete Monument


The bench mark is at the NE corner of the parkway at the west bridge approach at
the intersection of the line between the first and second concrete blocks east
of the grass plot on the south side of the roadway and the line between the
first and second concrete blocks south of the sidewalk, 36 feet (11 m) west of
Bench Mark 10 1937, and 19 feet (6 m) west of the southernmost of two stone lion
statues at Bridge of the Lions.



                         BENCH MARK STAMPING:  US ENGINEERS HARBOR SURVEYS 1934
                                               ELEV STA

MONUMENTATION:           Survey Disk                               VM#:     5205
AGENCY:                                                            PID#:  AQ0271
SETTING CLASSIFICATION:  Concrete Sidewalk


The bench mark is set flush in the sidewalk at the SW abutment of Bridge of the
Lions, 35 feet (11 m) west of the SW bridge abutment and handrail, 35 feet (11
m) west of Bench Mark 10 1937, and 20 feet (6 m) west of the west base of a
stone lion statue.

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

                                                   PUBLICATION DATE:  09/22/1987
Station ID: 8720576                                SUPERCEDED DATE:   04/21/2003
Name:       ST. AUGUSTINE, INTRACOASTAL WATERWAY, MATANZAS RIV
            FLORIDA
NOAA Chart: 11488                                  Latitude:         29° 53.5' N
USGS Quad:  ST.AUGUSTINE                           Longitude:        81° 18.6' W


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


                         BENCH MARK STAMPING:  10 1937

MONUMENTATION:           Survey Disk                               VM#:     5206
AGENCY:                                                            PID#:  AQ0272
SETTING CLASSIFICATION:  Concrete Curb


The bench mark is set in the concrete curbing at the south abutment of Bridge of
the Lions, halfway between the second and third concrete posts from the corner
of the bridge, 10 feet (3 m) east of the east end of the base of the
southernmost of the two stone lion statues, 15 feet (5 m) west and 5 feet  (2 m)
above the seawall, and about 1 foot (0.3 m) above the level of the highway.



                         BENCH MARK STAMPING:  TIDAL II RESET 1959

MONUMENTATION:           Survey Disk                               VM#:     5207
AGENCY:                                                            PID#:  AQ0266
SETTING CLASSIFICATION:  Concrete Monument


The bench mark is set in the top of a concrete monument, 168 feet (51 m) NW of
the north end of the west abutment of Bridge of the Lions, 142 feet (43 m) north
of the north curb of State Highway A1A, 6 feet (2 m) SW of the SW edge of the
seawall, and level with the ground.



                         BENCH MARK STAMPING:  NO STAMPING 1

MONUMENTATION:           High Point of Statue                      VM#:     5209
AGENCY:                                                            PID#:  AQ1533
SETTING CLASSIFICATION:  Bronze Statue


The bench mark is the top of the head of the bronze American Eagle statue, with
a 1.5-foot (0.5 m) wing spread, at the south side of a bronze Memorial flagpole
base in the circle between Charlotte Street Cathedral Place and Avienda
Menendez, 55 feet (17 m) east of the centerline of Charlotte Street, 50 feet (15
m) north of the centerline of Cathedral Place, and 5 feet (2 m) above the
sidewalk.

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

                                                   PUBLICATION DATE:  09/22/1987
Station ID: 8720576                                SUPERCEDED DATE:   04/21/2003
Name:       ST. AUGUSTINE, INTRACOASTAL WATERWAY, MATANZAS RIV
            FLORIDA
NOAA Chart: 11488                                  Latitude:         29° 53.5' N
USGS Quad:  ST.AUGUSTINE                           Longitude:        81° 18.6' W


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


                         BENCH MARK STAMPING:  NO STAMPING 2

MONUMENTATION:           Granite Seawall                           VM#:     5210
AGENCY:                                                            PID#:  AQ0273
SETTING CLASSIFICATION:  Chiseled Square


The bench mark is in a granite seawall, 350 feet (107 m) south of the
intersection of Bay and King Streets and in front of the center of the entrance
to the pier, 27.5 feet (8.4 m) WNW of the SW corner of the public restrooms, 18
feet (5 m) west of the west side of the City Yacht Pier building, 9 feet (3 m)
east of the east curb of Avienda Menendez, 8 feet (2 m) east of the west edge of
the building, and 1 foot (0.3 m) above the sidewalk.

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

                                                   PUBLICATION DATE:  09/22/1987
Station ID: 8720576                                SUPERCEDED DATE:   04/21/2003
Name:       ST. AUGUSTINE, INTRACOASTAL WATERWAY, MATANZAS RIV
            FLORIDA
NOAA Chart: 11488                                  Latitude:         29° 53.5' N
USGS Quad:  ST.AUGUSTINE                           Longitude:        81° 18.6' W


                            T I D A L   D A T U M S 


Tidal datums at ST. AUGUSTINE, INTRACOASTAL WATERWAY, MATANZAS RIV based on:

     LENGTH OF SERIES:      58 MONTHS
     TIME PERIOD:           FEBRUARY1974-APRIL 1979
     TIDAL EPOCH:           1960-1978
     CONTROL TIDE STATION:  8720220 MAYPORT


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

     HIGHEST OBSERVED WATER LEVEL (11/03/1978)         =   7.34
     MEAN HIGHER HIGH WATER                     MHHW   =   5.05
     MEAN HIGH WATER                            MHW    =   4.73
     MEAN TIDE LEVEL                            MTL    =   2.45
   * NATIONAL GEODETIC VERTICAL DATUM           NGVD29 =   2.18
     MEAN LOW WATER                             MLW    =   0.18
     MEAN LOWER LOW WATER                       MLLW   =   0.00
     LOWEST  OBSERVED WATER LEVEL (09/05/1975)         =  -3.26

   * NGVD reference based on elevations published in Quad 290811, 1973, and NOS
     leveling of 1979. 
North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In FEET above:

     Stamping or Designation                    MLLW        MHW

     12 1974                                     7.76      3.03
     J 15 1932 7.608                             9.80      5.07
     LIONS 1934                                  9.84      5.11
     US ENGINEERS HARBOR SURVEYS 1934
     ELEV STA                                    9.84      5.11
     10 1937                                    10.47      5.74
     TIDAL II RESET 1959                         9.12      4.39
     NO STAMPING 1                              14.53      9.80
     NO STAMPING 2                               8.57      3.84


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

                                                   PUBLICATION DATE:  09/22/1987
Station ID: 8720576                                SUPERCEDED DATE:   04/21/2003
Name:       ST. AUGUSTINE, INTRACOASTAL WATERWAY, MATANZAS RIV
            FLORIDA
NOAA Chart: 11488                                  Latitude:         29° 53.5' N
USGS Quad:  ST.AUGUSTINE                           Longitude:        81° 18.6' 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.