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

                                                                                
Station ID: 8722669                         PUBLICATION DATE:  12/01/2011
Name:       LAKE WORTH INTRACOASTAL WATERWAY                  
            FL
NOAA Chart: 11467                           Latitude:   26° 36.8' N (  26.61330)
USGS Quad:  LAKE WORTH                      Longitude:  80°  2.8' W ( -80.04670)


To reach the station from Interstate 95 South exit 64, turn left onto 10th
Avenue and travel 1.6 km (1.0 mi) to north Federal Highway/SR-5, turn right onto
north Federal Highway and travel 1.3 km (0.8 mi) to Lake Avenue/SR-802E, turn
left onto Lake Avenue and travel 0.4 km (0.2 mi) to Golfview Road, turn right
onto Golfview Road and travel 0.2 km (0.1 mi) to Bryant Park.  The bench marks
are located in the vicinity of the Park.


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


                 PRIMARY BENCH MARK STAMPING:  2669 A 2008
                         DESIGNATION:          872 2669 A

MONUMENTATION:           Tidal Station disk                    VM#:        18585
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Concrete pad                          OPUS PID:        
LATITUDE:   26° 36.8' N (  26.61327)          LONGITUDE:  80°  2.8' W ( -80.04705)


The primary bench mark is a disk set flush in the SW corner of a 7.3 m x 7.3 m
(23.95 ft x 23.95 ft) concrete pad on the jetty, 59.436 m (195.0 ft) east from
the west end of the Jetty, 14.996 m (49.2 ft) north of the south edge of the
north/south pier off the south side of the Jetty, 4.876 m (16.0 ft) west of the
east edge of the concrete pad, 2.438 m (8.0 ft) east of the west edge of the
concrete pad, and 0.153 m (0.5 ft) north of the south edge of the concrete pad.

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

                                                                                
Station ID: 8722669                         PUBLICATION DATE:  12/01/2011
Name:       LAKE WORTH INTRACOASTAL WATERWAY                  
            FL
NOAA Chart: 11467                           Latitude:   26° 36.8' N (  26.61330)
USGS Quad:  LAKE WORTH                      Longitude:  80°  2.8' W ( -80.04670)


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


                         BENCH MARK STAMPING:  2669 B 2008
                         DESIGNATION:          872 2669 B

MONUMENTATION:           Tidal Station disk                    VM#:        18586
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Seawall                               OPUS PID:        
LATITUDE:   26° 36.8' N (  26.61339)          LONGITUDE:  80°  2.9' W ( -80.04772)


The bench mark is a disk set flush into the park seawall, 8.229 m (27.0 ft) ESE
of light pole No. 3-300, 4.267 m (14.0 ft) east of the centerline of a bike
path, 3.414 m (11.2 ft) north of the south end of the seawall, and 1.676 m (5.5
ft) SSE of a concrete sign post 1.448 m (4.75 ft) high.



                         BENCH MARK STAMPING:  2669 C 2008
                         DESIGNATION:          872 2669 C

MONUMENTATION:           Tidal Station disk                    VM#:        18587
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Seawall                               OPUS PID:        
LATITUDE:   26° 36.8' N (  26.61405)          LONGITUDE:  80°  2.9' W ( -80.04752)


The bench mark is a disk set flush into the park seawall, 14.325 m (47.0 ft)
east of a concrete sitting bench, 11.125 m (36.5 ft) west of the end of a boat
dock on the south side of the boat ramp, 7.62 m (25.0 ft) east of a light pole
No. 3-302, and 1.128 m (3.7 ft) south of the north end of the seawall on the
south side of the boat ramp.

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

                                                                                
Station ID: 8722669                         PUBLICATION DATE:  12/01/2011
Name:       LAKE WORTH INTRACOASTAL WATERWAY                  
            FL
NOAA Chart: 11467                           Latitude:   26° 36.8' N (  26.61330)
USGS Quad:  LAKE WORTH                      Longitude:  80°  2.8' W ( -80.04670)


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


                         BENCH MARK STAMPING:  2669 D 2008
                         DESIGNATION:          872 2669 D

MONUMENTATION:           Tidal Station disk                    VM#:        18588
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Seawall                               OPUS PID:        
LATITUDE:   26° 36.9' N (  26.61439)          LONGITUDE:  80°  2.8' W ( -80.04749)


The bench mark is a disk set into the park seawall, 16.703 m (54.8 ft) SE of
light pole No. 3-304, on the north side of the boat ramp, 11.125 m (36.5 ft)
west of the east end of a boat dock on the north side of the boat ramp, 7.224 m
(23.7 ft) east of light pole No. 3-303, and 1.585 m (5.2 ft) north of the
southern end of the seawall on the north side of the boat ramp.



                         BENCH MARK STAMPING:  2669 E 2008
                         DESIGNATION:          872 2669 E

MONUMENTATION:           Tidal Station disk                    VM#:        18589
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Seawall                               OPUS PID:        
LATITUDE:   26° 36.9' N (  26.61447)          LONGITUDE:  80°  2.9' W ( -80.04764)


The bench mark is a disk set in the park seawall, 12.497 m (41.0 ft) west of
light pole No. 3-303, 9.144 m (30.0 ft) south from a paved bike path, 8.625 m
(28.3 ft) east of the west end of the boat ramp.

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

                                                                                
Station ID: 8722669                         PUBLICATION DATE:  12/01/2011
Name:       LAKE WORTH INTRACOASTAL WATERWAY                  
            FL
NOAA Chart: 11467                           Latitude:   26° 36.8' N (  26.61330)
USGS Quad:  LAKE WORTH                      Longitude:  80°  2.8' W ( -80.04670)


                            T I D A L   D A T U M S 


Tidal datums at LAKE WORTH INTRACOASTAL WATERWAY based on:

     LENGTH OF SERIES:      2 YEARS
     TIME PERIOD:           October 2008 - 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:

     HIGHEST OBSERVED WATER LEVEL (09/25/2008)         =  1.471
     MEAN HIGHER HIGH WATER                     MHHW   =  0.908
     MEAN HIGH WATER                            MHW    =  0.858
     MEAN TIDE LEVEL                            MTL    =  0.449
     MEAN SEA LEVEL                             MSL    =  0.441
     MEAN LOW WATER                             MLW    =  0.040
     MEAN LOWER LOW WATER                       MLLW   =  0.000
     LOWEST  OBSERVED WATER LEVEL (12/13/2008)         = -0.336

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     2669 A 2008                                 2.102    1.244
     2669 B 2008                                 2.060    1.202
     2669 C 2008                                 2.006    1.148
     2669 D 2008                                 2.032    1.174
     2669 E 2008                                 1.590    0.732


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

                                                                                
Station ID: 8722669                         PUBLICATION DATE:  12/01/2011
Name:       LAKE WORTH INTRACOASTAL WATERWAY                  
            FL
NOAA Chart: 11467                           Latitude:   26° 36.8' N (  26.61330)
USGS Quad:  LAKE WORTH                      Longitude:  80°  2.8' W ( -80.04670)


                             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.