U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
Datums Page                                                        Page  1 of  9

                                                                                
Station ID: 8722059                         PUBLICATION DATE:  02/14/2011
Name:       WABASSO,INDIAN RIVER                              
            FL
NOAA Chart: 11474                           Latitude:   27° 45.3' N (  27.75500)
USGS Quad:  VERO BEACH                      Longitude:  80° 25.5' W ( -80.42500)


To reach the tidal bench marks from the intersection of U.S. Highway 1 and State
Road 510 in Wabasso, proceed 1.21 km (0.75 mi) NE on State Road 510 to the west
end of the second bridge span over Indian River.  The bench marks are located on
the bridge wingwall and the bridge.  The tide gage and staff were located on the
adjacent fishing catwalk.  


                         T I D A L   B E N C H   M A R K S
                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  2 of  9

                                                                                
Station ID: 8722059                         PUBLICATION DATE:  02/14/2011
Name:       WABASSO,INDIAN RIVER                              
            FL
NOAA Chart: 11474                           Latitude:   27° 45.3' N (  27.75500)
USGS Quad:  VERO BEACH                      Longitude:  80° 25.5' W ( -80.42500)


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


                 PRIMARY BENCH MARK STAMPING:  K 306 1970
                         DESIGNATION:          K 306

MONUMENTATION:           Bench Mark disk                       VM#:         5405
AGENCY:                  US Coast and Geodetic Survey
                         (USC&GS)                              IDB PID#:  AF3457
SETTING CLASSIFICATION:  Guardrail base                        OPUS PID:        
LATITUDE:   27° 45.3' N (  27.75444)          LONGITUDE:  80° 25.6' W ( -80.42667)


The primary bench mark is a disk set flush in the top of the west end of the
concrete base for the north guard rail 0.30 m (1.0 ft) above the level of County
Road 510 11.58 m (38.0 ft) NE of a bench mark 2059 E, 5.36 m (17.6 ft) north of
the centerline of County Road 510 and 0.18 m (0.6 ft) south of the north bridge
guard rail.



                         BENCH MARK STAMPING:  NO 1 1972
                         DESIGNATION:          872 2059 TIDAL 1

MONUMENTATION:           Tidal Station disk                    VM#:         5406
AGENCY:                  US Coast and Geodetic Survey
                         (USC&GS)                              IDB PID#:  AF6799
SETTING CLASSIFICATION:  Seawall                               OPUS PID:        
LATITUDE:   27° 45.2' N (  27.75389)          LONGITUDE:  80° 25.6' W ( -80.42667)


The bench mark is a disk set flush in the top of a concrete seawall 3.04 m (10.0
ft) below the level of County Road 510, 42.34 m (138.9 ft) WSW of bench mark NO
2 1972, 40.23 m (132.0 ft) SW of the SW bridge abutment, 2.77 m (78.0 ft) south
of the centerline of County Road 510, 10.70 m (35.1 ft) NNE of the NW corner of
a concrete pad of a picnic pavilion, 9.05 m (29.7 ft) NW of the NE corner of a
concrete pad of a picnic pavilion, 3.66 m (12.0 ft) south of the south edge of a
1.52 m (5.0 ft) concrete sidewalk and 0.76 m (2.5 ft) west of the west edge of a
1.52 m (5.0 ft) concrete sidewalk.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  3 of  9

                                                                                
Station ID: 8722059                         PUBLICATION DATE:  02/14/2011
Name:       WABASSO,INDIAN RIVER                              
            FL
NOAA Chart: 11474                           Latitude:   27° 45.3' N (  27.75500)
USGS Quad:  VERO BEACH                      Longitude:  80° 25.5' W ( -80.42500)


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


                         BENCH MARK STAMPING:  NO 2 1972
                         DESIGNATION:          872 2059 TIDAL 2

MONUMENTATION:           Tidal Station disk                    VM#:         5407
AGENCY:                  US Coast and Geodetic Survey
                         (USC&GS)                              IDB PID#:  AF6798
SETTING CLASSIFICATION:  Seawall                               OPUS PID#: AF6798
LATITUDE:   27° 45.3' N (  27.75417)          LONGITUDE:  80° 25.6' W ( -80.42667)


The bench mark is a disk set flush in the top of a concrete seawall 3.05 m (10.0
ft) below the level of County Road 510, 23.56 m (77.3 ft) south of the
centerline of County Road 510, 18.62 m (61.1 ft) SE of bench mark 2059 E, 16.70
m (54.8 ft) SW of bench mark NO 3 1972, 13.20 m (43.3 ft) SW of the approximate
centerline of a concrete catwalk-fishing pier, 4.33 m (14.2 ft) SE of a 14-inch
cabbage palm, and 0.30 m (1.0 ft) north of the south edge of the concrete
seawall.



                         BENCH MARK STAMPING:  NO 3 1972
                         DESIGNATION:          872 2059 TIDAL 3

MONUMENTATION:           Tidal Station disk                    VM#:         5408
AGENCY:                  US Coast and Geodetic Survey
                         (USC&GS)                              IDB PID#:  AF6797
SETTING CLASSIFICATION:  Seawall                               OPUS PID:        
LATITUDE:   27° 45.3' N (  27.75444)          LONGITUDE:  80° 25.6' W ( -80.42667)


The bench mark is a disk set flush in the top of a concrete seawall 3.05 m (10.0
ft) below the level of County Road 510, 16.70 m (54.8 ft) NE of bench mark NO 2
1972, 8.96 m (29.4 ft) east of bench mark 2059 E, 6.95 m (22.8 ft) south of the
centerline of County Road 510, 3.66 m (12.0 ft) north of the approximate
centerline of a concrete catwalk-fishing pier and 0.30 m (1.0 ft) west of the
edge of the concrete seawall.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  4 of  9

                                                                                
Station ID: 8722059                         PUBLICATION DATE:  02/14/2011
Name:       WABASSO,INDIAN RIVER                              
            FL
NOAA Chart: 11474                           Latitude:   27° 45.3' N (  27.75500)
USGS Quad:  VERO BEACH                      Longitude:  80° 25.5' W ( -80.42500)


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


                         BENCH MARK STAMPING:  2059 E
                         DESIGNATION:          SR 510=872 2059 E TIDAL

MONUMENTATION:           Tidal Station disk                    VM#:         5409
AGENCY:                  Florida Department of Transportation
                         (FLDT)                                IDB PID#:  AF6796
SETTING CLASSIFICATION:  Concrete guardrail                    OPUS PID:        
LATITUDE:   27° 45.3' N (  27.75417)          LONGITUDE:  80° 25.6' W ( -80.42667)


The bench mark is a disk set flush in the top of the west end of the south
concrete guard rail 1.22 m (4.0 ft) above the level of County Road 510, 11.58 m
(38.0 ft) SW of bench mark K 306 1970, and 6.10 m (20.0 ft) south of the
centerline of County Road 510.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  5 of  9

                                                                                
Station ID: 8722059                         PUBLICATION DATE:  02/14/2011
Name:       WABASSO,INDIAN RIVER                              
            FL
NOAA Chart: 11474                           Latitude:   27° 45.3' N (  27.75500)
USGS Quad:  VERO BEACH                      Longitude:  80° 25.5' W ( -80.42500)


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


                         BENCH MARK STAMPING:  GPS 36
                         DESIGNATION:          GPS 36

MONUMENTATION:           Bench Mark disk                       VM#:        19492
AGENCY:                  Indian River County                   IDB PID#:  AA5810
SETTING CLASSIFICATION:  Concrete monument                     OPUS PID:        
LATITUDE:   27° 45.3' N (  27.75556)          LONGITUDE:  80° 26.3' W ( -80.43750)


The bench mark is a disk set in the top of a concrete monument level with the
ground, 2.56 m (8.4 ft) east of the east edge of the pavement of the southbound
lanes of U.S. Highway 1, and 2.41 m (7.9 ft) west of the west edge of the
pavement of the northbound lanes of U.S. Highway 1.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  6 of  9

                                                                                
Station ID: 8722059                         PUBLICATION DATE:  02/14/2011
Name:       WABASSO,INDIAN RIVER                              
            FL
NOAA Chart: 11474                           Latitude:   27° 45.3' N (  27.75500)
USGS Quad:  VERO BEACH                      Longitude:  80° 25.5' W ( -80.42500)


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


                         BENCH MARK STAMPING:  M 401 1991
                         DESIGNATION:          M 401

MONUMENTATION:           Bench Mark disk                       VM#:        19493
AGENCY:                  National Geodetic Survey (NGS)        IDB PID#:  AF7495
SETTING CLASSIFICATION:  Set vertically                        OPUS PID:        
LATITUDE:   27° 45.3' N (  27.75500)          LONGITUDE:  80° 26.3' W ( -80.43778)


The bench mark is a disk set vertically in the east face of the Wabasso School
at 8895 U.S. Highway 1 and 1.31 m (4.3 ft) above the level of the ground, 0.91 m
(3.0 ft) south of the NE corner of the Wabasso School.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  7 of  9

                                                                                
Station ID: 8722059                         PUBLICATION DATE:  02/14/2011
Name:       WABASSO,INDIAN RIVER                              
            FL
NOAA Chart: 11474                           Latitude:   27° 45.3' N (  27.75500)
USGS Quad:  VERO BEACH                      Longitude:  80° 25.5' W ( -80.42500)


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


                         BENCH MARK STAMPING:  J 306 1970
                         DESIGNATION:          J 306

MONUMENTATION:           Bench Mark disk                       VM#:        19494
AGENCY:                  US Coast and Geodetic Survey
                         (USC&GS)                              IDB PID#:  AF3458
SETTING CLASSIFICATION:  Gaurdrail base                        OPUS PID:        
LATITUDE:   27° 45.2' N (  27.75278)          LONGITUDE:  80° 25.8' W ( -80.42944)


The bench mark is a disk set flush in the top of the west end of the concrete
base for the north guard rail, 0.30 m (1.0 ft) above the level of County Road
510,  5.36 m (17.6 ft) north of the centerline of County Road 510, and 0.18 m
(0.6 ft) south of the north bridge guard rail.

                          U.S. DEPARTMENT OF COMMERCE
                National Oceanic and Atmospheric Administration
                            National Ocean Service
                                                                   Page  8 of  9

                                                                                
Station ID: 8722059                         PUBLICATION DATE:  02/14/2011
Name:       WABASSO,INDIAN RIVER                              
            FL
NOAA Chart: 11474                           Latitude:   27° 45.3' N (  27.75500)
USGS Quad:  VERO BEACH                      Longitude:  80° 25.5' W ( -80.42500)


                            T I D A L   D A T U M S 


Tidal datums at WABASSO,INDIAN RIVER based on:

     LENGTH OF SERIES:      3 MONTHS
     TIME PERIOD:           June 1972 - August 1972
     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:

     North American Vertical Datum              NAVD88 =  0.347
     MEAN HIGHER HIGH WATER                     MHHW   =  0.146
     MEAN HIGH WATER                            MHW    =  0.128
     MEAN TIDE LEVEL                            MTL    =  0.072
     MEAN SEA LEVEL                             MSL    =  0.068
     MEAN LOW WATER                             MLW    =  0.015
     MEAN LOWER LOW WATER                       MLLW   =  0.000

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     K 306 1970                                  4.312    4.184
     NO 1 1972                                   1.347    1.219
     NO 2 1972                                   1.361    1.233
     NO 3 1972                                   1.348    1.220
     2059 E                                      5.286    5.158
     GPS 36                                      2.729    2.601
     M 401 1991                                  4.422    4.294
     J 306 1970                                  3.393    3.265


Foot Notes:

Geodetic heights of the bench marks meet all NOAA/NOS/NGS quality control
standards for Second Order, Class 1 leveling.  It is advised that a confirmation
set of levels be established for bench marks GPS 36, J 306 1970, and M 401 1991
to verify height differences before using tidal bench mark elevation
information.

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

                                                                                
Station ID: 8722059                         PUBLICATION DATE:  02/14/2011
Name:       WABASSO,INDIAN RIVER                              
            FL
NOAA Chart: 11474                           Latitude:   27° 45.3' N (  27.75500)
USGS Quad:  VERO BEACH                      Longitude:  80° 25.5' W ( -80.42500)


                             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.