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

                                                                                
Station ID: 8721456                         PUBLICATION DATE:  02/10/2005
Name:       TITUSVILLE, INDIAN RIVER                          
            FL
NOAA Chart: 11484                           Latitude:   28° 37.2' N (  28.62000)
USGS Quad:  TITUSVILLE                      Longitude:  80° 48.0' W ( -80.80000)


To reach the tidal bench marks from the intersection of U.S. Highway 1 and State
Highway 402 in Titusville, proceed east of State Highway 402 for 0.89 km (0.55
mi) to the west end of the highway bridge over the Indian River.  The bench
marks are located SW and south of the bridge along State Highway 402.  The tide
gage and staff were located on the Veterans Memorial Pier at the SW end of the
bridge and north of the highway.


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


                 PRIMARY BENCH MARK STAMPING:  Z 131
                         DESIGNATION:          872 1456 Z 131

MONUMENTATION:           Survey disk                           VM#:         5344
AGENCY:                  Florida State Road Department (FLSRD) IDB PID#:  AK0918
SETTING CLASSIFICATION:  Concrete abutment                     OPUS PID:        
LATITUDE:   28° 37.1' N (  28.61830)          LONGITUDE:  80° 48.2' W ( -80.80330)


The primary bench mark is a disk set in top of the SE concrete abutment of the
southernmost of two 46 m (150 ft) long bridges at the Titusville City limits,
5.64 m (18.5 ft) SE of the centerline of State Highway 402 eastbound, and 0.3 m
(1 ft) above the highway.

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

                                                                                
Station ID: 8721456                         PUBLICATION DATE:  02/10/2005
Name:       TITUSVILLE, INDIAN RIVER                          
            FL
NOAA Chart: 11484                           Latitude:   28° 37.2' N (  28.62000)
USGS Quad:  TITUSVILLE                      Longitude:  80° 48.0' W ( -80.80000)


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


                         BENCH MARK STAMPING:  IWBV 202 1952 JACKSONVILLE
                         DESIGNATION:          872 1456 IWBV 202

MONUMENTATION:           Survey disk                           VM#:         5341
AGENCY:                  US Army Corps of Engineers (USE)      IDB PID#:  AK0923
SETTING CLASSIFICATION:  Concrete bulkhead                     OPUS PID:        
LATITUDE:   28° 37.2' N (  28.62000)          LONGITUDE:  80° 48.0' W ( -80.80000)


The bench mark is a disk set flush in the top center of a concrete bulkhead cap
near the SW end of the State Highway 402 bridge over the Indian River, 6.89 m
(22.6 ft) NE of bench mark 10.18, 6.10 m (20.0 ft) SE of the centerline of the
highway, 0.91 m (3.0 ft) SE of being directly below the SE edge of the SE
sidewalk on the bridge, and 2.01 m (6.6 ft) below the sidewalk.



                         BENCH MARK STAMPING:  C 305 1970
                         DESIGNATION:          872 1456 C 305

MONUMENTATION:           Survey disk                           VM#:         5342
AGENCY:                  Florida State Road Department (FLSRD) IDB PID#:  AK0919
SETTING CLASSIFICATION:  Concrete abutment                     OPUS PID#: AK0919
LATITUDE:   28° 37.1' N (  28.61830)          LONGITUDE:  80° 48.2' W ( -80.80330)


The bench mark is a disk set flush in the NW concrete abutment of the
northernmost of two 46 m (150 ft) long bridges at the Titusville City limits
6.89 m (22.6 ft) NW of the centerline of State Highway 402 westbound, and 0.3 m
(1 ft) above the highway.

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

                                                                                
Station ID: 8721456                         PUBLICATION DATE:  02/10/2005
Name:       TITUSVILLE, INDIAN RIVER                          
            FL
NOAA Chart: 11484                           Latitude:   28° 37.2' N (  28.62000)
USGS Quad:  TITUSVILLE                      Longitude:  80° 48.0' W ( -80.80000)


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


                         BENCH MARK STAMPING:  D 305 1970
                         DESIGNATION:          872 1456 D 305

MONUMENTATION:           Survey disk                           VM#:         5343
AGENCY:                  Florida State Road Department (FLSRD) IDB PID#:  AK0927
SETTING CLASSIFICATION:  Concrete abutment                     OPUS PID#: AK0927
LATITUDE:   28° 37.1' N (  28.61830)          LONGITUDE:  80° 48.2' W ( -80.80330)


The bench mark is a disk set flush in the SE concrete abutment of the
northernmost of two 46 m (150 ft) long bridges at the Titusville City limits,
5.67 m (18.6 ft) SE of the centerline of State Highway 402 westbound, and 0.3 m
(1 ft) above the highway.



                         BENCH MARK STAMPING:  9.21
                         DESIGNATION:          872 1456 9.21

MONUMENTATION:           Survey disk                           VM#:         5345
AGENCY:                  Florida State Road Department (FLSRD) IDB PID#:  AK0920
SETTING CLASSIFICATION:  Concrete abutment                     OPUS PID:        
LATITUDE:   28° 37.1' N (  28.61830)          LONGITUDE:  80° 48.2' W ( -80.80330)


The bench mark is a disk set in top of the NW concrete abutment of the southern
most of two 46 m (150 ft) long bridges at the the Titusville City limits, 5.36 m
(17.6 ft) NW of the centerline of State Highway 402 eastbound, and 0.15 m (0.5
ft) above the highway.

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

                                                                                
Station ID: 8721456                         PUBLICATION DATE:  02/10/2005
Name:       TITUSVILLE, INDIAN RIVER                          
            FL
NOAA Chart: 11484                           Latitude:   28° 37.2' N (  28.62000)
USGS Quad:  TITUSVILLE                      Longitude:  80° 48.0' W ( -80.80000)


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


                         BENCH MARK STAMPING:  10.18
                         DESIGNATION:          872 1456 10.18

MONUMENTATION:           Survey disk                           VM#:         5346
AGENCY:                  Florida State Road Department (FLSRD) IDB PID#:  AK0924
SETTING CLASSIFICATION:  Concrete abutment                     OPUS PID:        
LATITUDE:   28° 37.2' N (  28.62000)          LONGITUDE:  80° 48.0' W ( -80.80000)


The bench mark is a disk set in the top of the SE abutment of the SW end of the
State Highway 402 bridge over the Indian River, 0.40 km (0.25 mi) NE of the two
46 m (150 ft) long bridges at the Titusville City limits, 5.49 m (18.0 ft) SE of
the centerline of State Highway 402 eastbound, and 0.3 m (1 ft) above the
highway.

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

                                                                                
Station ID: 8721456                         PUBLICATION DATE:  02/10/2005
Name:       TITUSVILLE, INDIAN RIVER                          
            FL
NOAA Chart: 11484                           Latitude:   28° 37.2' N (  28.62000)
USGS Quad:  TITUSVILLE                      Longitude:  80° 48.0' W ( -80.80000)


                            T I D A L   D A T U M S 


Tidal datums at TITUSVILLE, INDIAN RIVER based on:

     LENGTH OF SERIES:      4 YEARS
     TIME PERIOD:           December 1979 - November 1983
     TIDAL EPOCH:           1983-2001
     CONTROL TIDE STATION:  8720220 MAYPORT


Elevations of tidal datums referred to Mean Sea Level (MSL), in METERS:

     HIGHEST OBSERVED WATER LEVEL (10/20/1970)         =  0.326
     North American Vertical Datum              NAVD88 =  0.214
     MEAN SEA LEVEL                             MSL    =  0.000
     LOWEST  OBSERVED WATER LEVEL (02/04/1978)         = -0.487

North American Vertical Datum (NAVD88)

Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                                MSL

     Z 131                                                2.594
     IWBV 202 1952 JACKSONVILLE                           0.692
     C 305 1970                                           2.523
     D 305 1970                                           2.621
     9.21                                                 2.599
     10.18                                                2.913


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

                                                                                
Station ID: 8721456                         PUBLICATION DATE:  02/10/2005
Name:       TITUSVILLE, INDIAN RIVER                          
            FL
NOAA Chart: 11484                           Latitude:   28° 37.2' N (  28.62000)
USGS Quad:  TITUSVILLE                      Longitude:  80° 48.0' W ( -80.80000)


                             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.