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

                                                                                
Station ID: 9759189                         PUBLICATION DATE:  11/03/2011
Name:       PUERTO REAL                                       
            PR
NOAA Chart: 25671                           Latitude:   18°  4.5' N (  18.07481)
USGS Quad:  PUERTO REAL, P.R.               Longitude:  67° 11.3' W ( -67.18878)


To reach the bench mark from the intersection of PR-100 and PR-308, proceed west
on PR-308 3.5 km (2.2 mi) to the Puerto Real and Marina Pescaderia on the left. 
The tide gauge is located on the seaward edge of the dock near the large
flagpole.  The bench marks are located in the marina and in the public plaza
west of the marina.


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


                 PRIMARY BENCH MARK STAMPING:  9189 A 2011
                         DESIGNATION:          975 9189 A

MONUMENTATION:           Bench Mark disk                       VM#:        20056
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Concrete and sheet pile dock          OPUS PID:        
LATITUDE:   18°  4.5' N (  18.07486)          LONGITUDE:  67° 11.3' W ( -67.18881)


The primary bench mark is set in the seaward edge of the concrete and sheet pile
dock, 28.78 m (94.4 ft) NW of bench mark 975 9189 B, 17.5 m (57.4 ft) NW of the
middle dock, 9.12 m (29.9 ft) SSE of the north most dock, 1.89 m (6.2 ft) west
of the flagpole and 0.33 m (1.1 ft) east of the edge of the dock.

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

                                                                                
Station ID: 9759189                         PUBLICATION DATE:  11/03/2011
Name:       PUERTO REAL                                       
            PR
NOAA Chart: 25671                           Latitude:   18°  4.5' N (  18.07481)
USGS Quad:  PUERTO REAL, P.R.               Longitude:  67° 11.3' W ( -67.18878)


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


                         BENCH MARK STAMPING:  9189 B 2011
                         DESIGNATION:          975 9189 B

MONUMENTATION:           Bench Mark disk                       VM#:        20058
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Concrete and sheet pile dock          OPUS PID#: BBCK18
LATITUDE:   18°  4.5' N (  18.07464)          LONGITUDE:  67° 11.3' W ( -67.18867)


The bench mark is set in the seaward edge of the concrete and sheet pile dock,
28.78 m (94.4 ft) se of bench mark 975 9189 A, 23.45 m (76.9 ft) SW of the
western corner of the restaurant building beneath a concrete bar, 18.04 m (59.2
ft) NW of the southern most dock, 11.52 m (37.8 ft) SSE of the middle dock, 3.77
m (12.4 ft) NW of the white light pole and 0.33 m (1.1 ft) NE of the edge of the
dock.



                         BENCH MARK STAMPING:  9189 C 2011
                         DESIGNATION:          975 9189 C

MONUMENTATION:           Bench Mark disk                       VM#:        20059
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Concrete patio                        OPUS PID:        
LATITUDE:   18°  4.5' N (  18.07486)          LONGITUDE:  67° 11.3' W ( -67.18833)


The bench mark is set in a concrete patio behind the marina restaurant, 11.33 m
(37.2 ft) SW of the first door in the back of the marina office, 10.48 m (34.4
ft) ENE of the open entryway to the back of the restaurant, 3.71 m (12.2 ft) NW
of the edge of the concrete pad and a seawall, 1.05 m (3.4 ft) SW of the chain
link fence and 0.34 m (1.1 ft) SW of the edge of the patio.

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

                                                                                
Station ID: 9759189                         PUBLICATION DATE:  11/03/2011
Name:       PUERTO REAL                                       
            PR
NOAA Chart: 25671                           Latitude:   18°  4.5' N (  18.07481)
USGS Quad:  PUERTO REAL, P.R.               Longitude:  67° 11.3' W ( -67.18878)


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


                         BENCH MARK STAMPING:  9189 D 2011
                         DESIGNATION:          975 9189 D

MONUMENTATION:           Bench Mark disk                       VM#:        20060
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Concrete driveway                     OPUS PID:        
LATITUDE:   18°  4.5' N (  18.07519)          LONGITUDE:  67° 11.3' W ( -67.18836)


The bench mark is set on the east side of a concrete border around a circle
driveway at the entrance to Marina Pescaderia, 17.50 m (57.4 ft) south of a
concrete utility and light pole, 15.32 m (50.3 ft) east of the guard shack at
the vehicle gate entrance to Marina Pescaderia, 7.39 m (24.2 ft) SW of a fire
hydrant and 3.81 m (12.5 ft) WNW of the next door house foundation.



                         BENCH MARK STAMPING:  9189 E 2011
                         DESIGNATION:          975 9189 E

MONUMENTATION:           Bench Mark disk                       VM#:        20061
AGENCY:                  National Ocean Service (NOS)          IDB PID#:        
SETTING CLASSIFICATION:  Concrete stair                        OPUS PID:        
LATITUDE:   18°  4.6' N (  18.07614)          LONGITUDE:  67° 11.3' W ( -67.18911)


The bench mark is set in the bottom concrete step leading from the sidewalk up
to the plaza, 23.28 m (76.4 ft) west of the stairs leading up to the band stand
on the west side of the plaza, 18.05 m (59.2 ft) north of the near corner of the
concrete fence in front of the store at the street intersection, 3.02 m (9.9 ft)
south of an ornamental black light post and 1.53 m (5.0 ft) east of the face of
the curb.

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

                                                                                
Station ID: 9759189                         PUBLICATION DATE:  11/03/2011
Name:       PUERTO REAL                                       
            PR
NOAA Chart: 25671                           Latitude:   18°  4.5' N (  18.07481)
USGS Quad:  PUERTO REAL, P.R.               Longitude:  67° 11.3' W ( -67.18878)


                            T I D A L   D A T U M S 


Tidal datums at PUERTO REAL based on:

     LENGTH OF SERIES:      3 MONTHS
     TIME PERIOD:           June 2011 - August 2011
     TIDAL EPOCH:           1983-2001
     CONTROL TIDE STATION:  9759110 MAGUEYES ISLAND, CARIBBEAN SEA


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

     MEAN HIGHER HIGH WATER                     MHHW   =  0.247
     MEAN HIGH WATER                            MHW    =  0.222
     MEAN SEA LEVEL                             MSL    =  0.130
     MEAN TIDE LEVEL                            MTL    =  0.126
     MEAN LOW WATER                             MLW    =  0.030
     MEAN LOWER LOW WATER                       MLLW   =  0.000



Bench Mark Elevation Information                In METERS above:

     Stamping or Designation                    MLLW        MHW

     9189 A 2011                                 1.116    0.894
     9189 B 2011                                 1.065    0.843
     9189 C 2011                                 1.026    0.804
     9189 D 2011                                 1.248    1.026
     9189 E 2011                                 2.966    2.744


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

                                                                                
Station ID: 9759189                         PUBLICATION DATE:  11/03/2011
Name:       PUERTO REAL                                       
            PR
NOAA Chart: 25671                           Latitude:   18°  4.5' N (  18.07481)
USGS Quad:  PUERTO REAL, P.R.               Longitude:  67° 11.3' W ( -67.18878)


                             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 any other fixed island datum.

This tide station location has a defined island datum (PRVD02).  Island datums
are specific fixed geodetic datums whose elevation relationship 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 PRVD02 elevation is shown on the Elevations of Tidal Datums Table Referred
to MLLW only when two or more of the bench marks listed have PRVD02 elevations.
The PRVD02 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, PRVD02 bench mark elevations computed indirectly from the tidal
datums elevation table may differ slightly from PRVD02 elevations listed for
each bench mark in the NGS database.