U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
Datums Page                                                        Page  1 of  4

                                                                                
Station ID: 8722982                         PUBLICATION DATE:  02/13/2004
Name:        WEST LAKE, SOUTH END                             
            FL
NOAA Chart: 11466                           Latitude:   26°  2.0' N (  26.03330)
USGS Quad:  PORT EVERGLADES                 Longitude:  80°  7.4' W ( -80.12330)


To reach the tidal bench marks from the junction of State Highway A1A and County
Road 822 (Sheridan Street) in Hollywood Beach, proceed west on County Road 822
for 0.2 km (0.1 mi) to the bridge over the Intracoastal Waterway; continue for
another 0.6 km (0.4 mi) to the bridge over West Lake.  The bench marks are
located on the bridge over West Lake.  The tide gage and staff were located at
the West Lake bridge.


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


                 PRIMARY BENCH MARK STAMPING:  NO 3 1973
                         DESIGNATION:          872 2982 TIDAL 3

MONUMENTATION:           Tidal Station disk                    VM#:         5736
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  AD5895
SETTING CLASSIFICATION:  Concrete bulkhead                     OPUS PID:        
LATITUDE:   26°  2.0' N (  26.03330)          LONGITUDE:  80°  7.4' W ( -80.12330)


The primary bench mark is a disk set flush in the U-shaped concrete bulkhead for
the east side of the bridge, 16 m (52 ft) west of the SE end of the bulkhead.



                         BENCH MARK STAMPING:  NO 4 1973
                         DESIGNATION:          872 2982 TIDAL 4

MONUMENTATION:           Tidal Station disk                    VM#:         5737
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  AD5896
SETTING CLASSIFICATION:  Concrete bulkhead                     OPUS PID:        
LATITUDE:   26°  2.1' N (  26.03500)          LONGITUDE:  80°  7.4' W ( -80.12333)


The bench mark is a disk set flush in the U-shaped concrete bulkhead located
directly under the east end of the bridge and on the south side of the highway,
18 m (60 ft) south of the north 45 degree corner of the bulkhead, 16 m (52 ft)
north of the south 45 degree corner of the bulkhead.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  2 of  4

                                                                                
Station ID: 8722982                         PUBLICATION DATE:  02/13/2004
Name:        WEST LAKE, SOUTH END                             
            FL
NOAA Chart: 11466                           Latitude:   26°  2.0' N (  26.03330)
USGS Quad:  PORT EVERGLADES                 Longitude:  80°  7.4' W ( -80.12330)


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


                         BENCH MARK STAMPING:  NO 5 1973
                         DESIGNATION:          872 2982 TIDAL 5

MONUMENTATION:           Tidal Station disk                    VM#:         5738
AGENCY:                  National Ocean Survey (NOS)           IDB PID#:  AD5897
SETTING CLASSIFICATION:  Concrete bulkhead                     OPUS PID:        
LATITUDE:   26°  2.0' N (  26.03333)          LONGITUDE:  80°  7.4' W ( -80.12333)


The bench mark is a disk set flush in the U-shaped concrete bulkhead for the
east side of the bridge, 24 m (78 ft) west of the NE end of the bulkhead.



                         BENCH MARK STAMPING:  1 16.925
                         DESIGNATION:          1 16.925 FLHD

MONUMENTATION:           Bench Mark disk                       VM#:         5739
AGENCY:                  Florida Highway Division  (FLHD)      IDB PID#:  AD5899
SETTING CLASSIFICATION:  Concrete bridge curbing               OPUS PID:        
LATITUDE:   26°  2.0' N (  26.03330)          LONGITUDE:  80°  7.4' W ( -80.12330)


The bench mark is a disk set in the concrete curbing located at the SW end of
the bridge, 8 m (27 ft) south of the centerline of the bridge, and 0.15 m (0.5
ft) east of the west end of the bridge.



                         BENCH MARK STAMPING:  2 16.925
                         DESIGNATION:          2 16.925 FLHD

MONUMENTATION:           Bench Mark disk                       VM#:         5740
AGENCY:                  Florida Highway Division  (FLHD)      IDB PID#:  AD5898
SETTING CLASSIFICATION:  Concrete bridge curbing               OPUS PID:        
LATITUDE:   26°  2.0' N (  26.03330)          LONGITUDE:  80°  7.4' W ( -80.12330)


The bench mark is a disk set in the concrete curbing located at the NE corner of
the bridge, 8 m (27 ft) north of the centerline of the bridge, and 0.15 m (0.5
ft) west of the east end of the bridge.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  3 of  4

                                                                                
Station ID: 8722982                         PUBLICATION DATE:  02/13/2004
Name:        WEST LAKE, SOUTH END                             
            FL
NOAA Chart: 11466                           Latitude:   26°  2.0' N (  26.03330)
USGS Quad:  PORT EVERGLADES                 Longitude:  80°  7.4' W ( -80.12330)


                            T I D A L   D A T U M S 


Tidal datums at  WEST LAKE, SOUTH END based on:

     LENGTH OF SERIES:      1 MONTH
     TIME PERIOD:           August 1973 - August 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:

     MEAN HIGHER HIGH WATER                     MHHW   =  0.672
     MEAN HIGH WATER                            MHW    =  0.648
     North American Vertical Datum              NAVD88 =  0.630
     MEAN SEA LEVEL                             MSL    =  0.349
     MEAN TIDE LEVEL                            MTL    =  0.347
     MEAN LOW WATER                             MLW    =  0.046
     MEAN LOWER LOW WATER                       MLLW   =  0.000

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     NO 3 1973                                   1.261    0.613
     NO 4 1973                                   1.313    0.665
     NO 5 1973                                   1.316    0.668
     1 16.925                                    5.253    4.605
     2 16.925                                    5.246    4.598


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

                                                                                
Station ID: 8722982                         PUBLICATION DATE:  02/13/2004
Name:        WEST LAKE, SOUTH END                             
            FL
NOAA Chart: 11466                           Latitude:   26°  2.0' N (  26.03330)
USGS Quad:  PORT EVERGLADES                 Longitude:  80°  7.4' W ( -80.12330)


                             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.