U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
Datums Page                                                        Page  1 of 11

                                                                                
Station ID: 8722548                         PUBLICATION DATE:  04/19/2012
Name:       PGA BOULEVARD BRIDGE, PALM BEACH                  
            FL
NOAA Chart: 11466                           Latitude:   26° 50.6' N (  26.84330)
USGS Quad:  RIVIERA BEACH                   Longitude:  80°  4.0' W ( -80.06670)


To reach the station from the intersection of Interstate 95 and PGA Blvd proceed
east 2.89 km (1.8 mi) to PGA Marina located on the left immediately before the
PGA Blvd bridge spanning the inter coastal water way. Marks are located on PGA
Marina property.


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


                 PRIMARY BENCH MARK STAMPING:  2548 F 1981 BSM
                         DESIGNATION:          872 2548 F TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         5588
AGENCY:                  Florida Department of Natural Resources
                         (FLDNR)                               IDB PID#:  AD6295
SETTING CLASSIFICATION:  Concrete post                         OPUS PID:        
LATITUDE:   26° 50.0' N (  26.83353)          LONGITUDE:  80°  4.0' W ( -80.06692)


The primary bench mark is a disk set into the top of a concrete monument, 195.0
m (639.8 ft) west of the NW corner of the PGA Boulevard Bridge, 18.29 m (60.0
ft) north of the centerline of PGA Boulevard, 10.0 m (32.8 ft) west of the
centerline of Kidd Lane, 1.0 m (3.3 ft) WNW of a utility pole, 0.30 m (0.98 ft)
south of a witness post, and 0.17 m (0.56 ft) north of the north edge of the
sidewalk.  

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  2 of 11

                                                                                
Station ID: 8722548                         PUBLICATION DATE:  04/19/2012
Name:       PGA BOULEVARD BRIDGE, PALM BEACH                  
            FL
NOAA Chart: 11466                           Latitude:   26° 50.6' N (  26.84330)
USGS Quad:  RIVIERA BEACH                   Longitude:  80°  4.0' W ( -80.06670)


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


                         BENCH MARK STAMPING:  2548 G 1981
                         DESIGNATION:          872 2548 G TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         5589
AGENCY:                  Florida Department of Transportation
                         (FLDT)                                IDB PID#:  AD6294
SETTING CLASSIFICATION:  Concrete Bridge Guardrail             OPUS PID:        
LATITUDE:   26° 50.7' N (  26.84500)          LONGITUDE:  80°  4.0' W ( -80.06667)


The bench mark is a disk located 9.14 m (30.0 ft) north of the centerline of the
new PGA Boulevard bridge and 0.76 m (2.5 ft) west of the NE corner of the new
PGA Boulevard bridge.      



                         BENCH MARK STAMPING:  2548 H 2008
                         DESIGNATION:          872 2548 H

MONUMENTATION:           Tidal Station disk                    VM#:        18657
AGENCY:                  National Ocean Survey/Service(NOS)    IDB PID#:        
SETTING CLASSIFICATION:  Marina sea wall                       OPUS PID#: BBFN73
LATITUDE:   26° 50.7' N (  26.84500)          LONGITUDE:  80°  4.0' W ( -80.06670)


The bench mark is a disk set in the SW corner of the Marina Floating Dock Basin
located on the PGA Marina Property, 5.30 m (17.39 ft) north of the south edge of
the concrete pad, and 3.73 m (12.24 ft) west of the NE outside corner of a
concrete wall, and 3.43 m (11.25 ft) south of the southern-most boat forklift
dock stop.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  3 of 11

                                                                                
Station ID: 8722548                         PUBLICATION DATE:  04/19/2012
Name:       PGA BOULEVARD BRIDGE, PALM BEACH                  
            FL
NOAA Chart: 11466                           Latitude:   26° 50.6' N (  26.84330)
USGS Quad:  RIVIERA BEACH                   Longitude:  80°  4.0' W ( -80.06670)


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


                         BENCH MARK STAMPING:  2548 J 2008
                         DESIGNATION:          872 2548 J

MONUMENTATION:           Tidal Station disk                    VM#:        18659
AGENCY:                  National Ocean Survey/Service(NOS)    IDB PID#:        
SETTING CLASSIFICATION:  Marina sea wall                       OPUS PID#: BBFM69
LATITUDE:   26° 50.7' N (  26.84500)          LONGITUDE:  80°  4.0' W ( -80.06670)


The bench mark is set flush with the concrete located at Marina at NW corner of
floating floating Dock Basin, 26.78 m (87.86 ft) W of east face of the dock,
14.08 m (46.19 ft) ESE of SE intercoastal ship store, 2.06 m (6.76 ft) N of NW
inside corner of floating dock basin.



                         BENCH MARK STAMPING:  2548 K 2008
                         DESIGNATION:          872 2548 K

MONUMENTATION:           Tidal Station disk                    VM#:        18660
AGENCY:                  National Ocean Survey/Service(NOS)    IDB PID#:        
SETTING CLASSIFICATION:  Marina sea wall                       OPUS PID:        
LATITUDE:   26° 50.7' N (  26.84500)          LONGITUDE:  80°  4.0' W ( -80.06670)


The bench mark is set flush with the concrete located PGA Marina at east
entrance to lentine Marine office, 19.56 m (64.17 ft) W of east face of dock,
1.5 m (4.9 ft) E of SE corner of Lentine Marine, 25.36 m (83.20 ft) S of
centerline of eastern entrance to boatel.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  4 of 11

                                                                                
Station ID: 8722548                         PUBLICATION DATE:  04/19/2012
Name:       PGA BOULEVARD BRIDGE, PALM BEACH                  
            FL
NOAA Chart: 11466                           Latitude:   26° 50.6' N (  26.84330)
USGS Quad:  RIVIERA BEACH                   Longitude:  80°  4.0' W ( -80.06670)


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


                         BENCH MARK STAMPING:  2548 L 2008
                         DESIGNATION:          872 2548 L

MONUMENTATION:           Tidal Station disk                    VM#:        18661
AGENCY:                  National Ocean Survey/Service(NOS)    IDB PID#:        
SETTING CLASSIFICATION:  Marina sea wall                       OPUS PID:        
LATITUDE:   26° 50.7' N (  26.84500)          LONGITUDE:  80°  4.0' W ( -80.06670)


The bench mark is set flush with the concrete located in the southern side of
the western entrance to the boatel 18.065 m (59.268 ft) S of NW corner of PGA
Marina boatel, 17.14 m (56.23 ft) ENE of centerline of road leading to river
house resteraunt, and 12.58 m (51.27 ft) N of SW corner of PGA Marina Boatel.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  5 of 11

                                                                                
Station ID: 8722548                         PUBLICATION DATE:  04/19/2012
Name:       PGA BOULEVARD BRIDGE, PALM BEACH                  
            FL
NOAA Chart: 11466                           Latitude:   26° 50.6' N (  26.84330)
USGS Quad:  RIVIERA BEACH                   Longitude:  80°  4.0' W ( -80.06670)


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


                         BENCH MARK STAMPING:  L 305 1970
                         DESIGNATION:          L 305

MONUMENTATION:           Vertical Control disk                 VM#:        18866
AGENCY:                  US Coast and Geodetic Survey
                         (USC&GS)                              IDB PID#:  AD2889
SETTING CLASSIFICATION:  Concrete Catch Basin                  OPUS PID:        
LATITUDE:   26° 50.6' N (  26.84333)          LONGITUDE:  80°  3.5' W ( -80.05833)


The bench mark is a disk set in the top of the SW corner of a 3-foot square
concrete catch basin which is 0.91 m (3.0 ft) deep, 0.76 m (2.5 ft) below the
level of the highway, 64.01 m (210.0 ft) west of the NW corner of a 60-foot
bridge over a narrow channel, 10.67 m (35.0 ft) north of the center line of the
highway, and 8.23 m (27.0 ft) SW of the center of the junction of sidewalk
leading to apartment building.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  6 of 11

                                                                                
Station ID: 8722548                         PUBLICATION DATE:  04/19/2012
Name:       PGA BOULEVARD BRIDGE, PALM BEACH                  
            FL
NOAA Chart: 11466                           Latitude:   26° 50.6' N (  26.84330)
USGS Quad:  RIVIERA BEACH                   Longitude:  80°  4.0' W ( -80.06670)


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


                         BENCH MARK STAMPING:  K 305 1970
                         DESIGNATION:          K 305

MONUMENTATION:           Bench Mark disk                       VM#:        18867
AGENCY:                  US Coast and Geodetic Survey
                         (USC&GS)                              IDB PID#:  AD2891
SETTING CLASSIFICATION:  Concrete Monument                     OPUS PID:        
LATITUDE:   26° 51.3' N (  26.85500)          LONGITUDE:  80°  3.5' W ( -80.05833)


The bench mark is a disk set in the top of a concrete post which projects 5
inches above the level of the ground, 35.97 m (118.0 ft) south of the center
line of pleasant drive, 12.50 m (41.0 ft) west of the center line of the
southbound lane of the highway, 5.79 m (19.0 ft) N of power line pole 15 D 10,
0.52 m (1.7 ft) S of a metal witness post, 0.46 m (1.5 ft) above the level of
the highway, and 0.46 m (1.5 ft) north of a concrete right-of-way marker which
projects 0.61 m (2.0 ft) above the level of the ground.  



                         BENCH MARK STAMPING:  2548 H 1990 JAX FLA
                         DESIGNATION:          872 2548 H TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:        18868
AGENCY:                  US Army Corps of Engineers (USE)      IDB PID#:  DK3503
SETTING CLASSIFICATION:  Concrete Bridge Sidewalk              OPUS PID:        
LATITUDE:   26° 50.7' N (  26.84500)          LONGITUDE:  80°  4.0' W ( -80.06667)


The bench mark is a disk set flush in the top of the concrete sidewalk located
175.26 m (575.0 ft) west of the approximate centerline of Ellison Wilson Road,
27.16 m (89.1 ft) W of a FLDOT survey mark 2548 G 1981, 1.22 m (4.0 ft) north of
the north edge of the pavement of PGA Boulevard's westbound lanes, 1.13 m (3.7
ft) south of the concrete guardrail along the north edge of the bridge, and 0.21
m (0.7 ft) above the level of PGA Boulevard.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  7 of 11

                                                                                
Station ID: 8722548                         PUBLICATION DATE:  04/19/2012
Name:       PGA BOULEVARD BRIDGE, PALM BEACH                  
            FL
NOAA Chart: 11466                           Latitude:   26° 50.6' N (  26.84330)
USGS Quad:  RIVIERA BEACH                   Longitude:  80°  4.0' W ( -80.06670)


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


                         BENCH MARK STAMPING:  2548 J 2006
                         DESIGNATION:          872 2548 J TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:        18869
AGENCY:                  Florida Department of Environment
                         Protection (FLDE                      IDB PID#:  DK3502
SETTING CLASSIFICATION:  Stainless Steel Rod                   OPUS PID:        
LATITUDE:   26° 50.7' N (  26.84500)          LONGITUDE:  80°  3.9' W ( -80.06500)


The bench mark is a stainless steel rod located about 122.53 m (402.0 ft) east
of bench mark 2548 G 1981, 25.30 m (83.0 ft) west of the approximate centerline
of Ellison Wilson road, 2.74 m (9.0 ft) north of the north edge of the pavement
of PGA Boulevard, 0.61 m (2.0 ft) SE of a traffic warning sign (BRIDGE AHEAD),
0.52 m (1.7 ft) west of the west edge of a 5-foot concrete sidewalk, 0.27 m (0.9
ft) south of a carsonite witness post, and 0.21 m (0.7 ft) north of the north
edge of a 6-foot concrete sidewalk.  The bench mark is a stainless steel rod
driven to refusal at a depth of 24.38 m (80.0 ft) with a magnet placed inside an
NGS logo cap flush with ground and 0.18 m (0.6 ft) above the level of PGA
Boulevard.  The datum point is recessed 0.12 m (0.4 ft) below the level of the
NGS logo cap and access to the datum point is had through a 5-inch NGS logo cap.
 

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  8 of 11

                                                                                
Station ID: 8722548                         PUBLICATION DATE:  04/19/2012
Name:       PGA BOULEVARD BRIDGE, PALM BEACH                  
            FL
NOAA Chart: 11466                           Latitude:   26° 50.6' N (  26.84330)
USGS Quad:  RIVIERA BEACH                   Longitude:  80°  4.0' W ( -80.06670)


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


                         BENCH MARK STAMPING:  BM I95 K15
                         DESIGNATION:          I95 K15

MONUMENTATION:           Bench Mark disk                       VM#:        18870
AGENCY:                  Florida Department of Transportation
                         (FLDT)                                IDB PID#:  AC5289
SETTING CLASSIFICATION:  Concrete Bridge Guardrail             OPUS PID:        
LATITUDE:   26° 50.7' N (  26.84500)          LONGITUDE:  80°  4.0' W ( -80.06670)


The bench mark is a disk set in the top west end of the north concrete guardrail
of the bridge over the Intracoastal Waterway, 2.74 m (9.0 ft) north of the north
edge of the north concrete curb of the westbound lanes.  

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  9 of 11

                                                                                
Station ID: 8722548                         PUBLICATION DATE:  04/19/2012
Name:       PGA BOULEVARD BRIDGE, PALM BEACH                  
            FL
NOAA Chart: 11466                           Latitude:   26° 50.6' N (  26.84330)
USGS Quad:  RIVIERA BEACH                   Longitude:  80°  4.0' W ( -80.06670)


                            T I D A L   D A T U M S 


Tidal datums at PGA BOULEVARD BRIDGE, PALM BEACH based on:

     LENGTH OF SERIES:      8 MONTHS
     TIME PERIOD:           February 2010 - September 2010
     TIDAL EPOCH:           1983-2001
     CONTROL TIDE STATION:  8723214 VIRGINIA KEY, BISCAYNE BAY


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

     MEAN HIGHER HIGH WATER                     MHHW   =  0.898
     MEAN HIGH WATER                            MHW    =  0.849
     North American Vertical Datum              NAVD88 =  0.755
     MEAN SEA LEVEL                             MSL    =  0.450
     MEAN TIDE LEVEL                            MTL    =  0.447
     MEAN LOW WATER                             MLW    =  0.044
     MEAN LOWER LOW WATER                       MLLW   =  0.000

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     2548 F 1981 BSM                             1.590    0.741
     2548 G 1981                                 9.549    8.700
     2548 H 2008                                 2.082    1.233
     2548 J 2008                                 2.186    1.337
     2548 K 2008                                 2.063    1.214
     2548 L 2008                                 2.359    1.510
     L 305 1970                                  1.829    0.980
     K 305 1970                                  6.414    5.565
     2548 H 1990 JAX FLA                         9.145    8.296
     2548 J 2006                                 7.838    6.989
     BM I95 K15                                  8.416    7.567


                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page 10 of 11

                                                                                
Station ID: 8722548                         PUBLICATION DATE:  04/19/2012
Name:       PGA BOULEVARD BRIDGE, PALM BEACH                  
            FL
NOAA Chart: 11466                           Latitude:   26° 50.6' N (  26.84330)
USGS Quad:  RIVIERA BEACH                   Longitude:  80°  4.0' W ( -80.06670)


Foot Notes:

Bench marks 2548 H 1990 JAX FLA, 2548 J 2006, BM I95 K15, K 305 1970, and L 305
1970  are based on one differential leveling connection and do 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 11 of 11

                                                                                
Station ID: 8722548                         PUBLICATION DATE:  04/19/2012
Name:       PGA BOULEVARD BRIDGE, PALM BEACH                  
            FL
NOAA Chart: 11466                           Latitude:   26° 50.6' N (  26.84330)
USGS Quad:  RIVIERA BEACH                   Longitude:  80°  4.0' W ( -80.06670)


                             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.