U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 6
Station ID: 9753641 PUBLICATION DATE: 11/03/2011
Name: NAGUABO
PR
NOAA Chart: 25665 Latitude: 18° 11.2' N ( 18.18706)
USGS Quad: NAGUABO, P.R. Longitude: 65° 42.7' W ( -65.71139)
To reach the bench marks from the exit for PR-3 from Highway PR-53, turn right
and proceed 1.0 km (0.6 mi) west on PR-3, then turn left and continue on PR-3
0.1 km (0.1 mi) south and then turn right and continue on PR-3 2.8 km (1.7 mi),
then turn left at the intersection and continue 0.3 km (0.2 mi) to the fishing
dock in Playa de Naguabo. The tide gauge is at the end of the pier, and the
bench marks are along the waterfront.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: NO 3 1975
DESIGNATION: 975 3634 TIDAL 3
MONUMENTATION: Bench Mark disk VM#: 20042
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete dock OPUS PID:
LATITUDE: 18° 11.3' N ( 18.18814) LONGITUDE: 65° 42.7' W ( -65.71144)
The primary bench mark is set in a concrete dock adjacent to a two story
building, 11.91 m (39.1 ft) east of the NW corner of the dock, 7.88 m (25.9 ft)
west of the seawall, 4.70 m (15.4 ft) NW of the concrete stairs underneath the
second story building and 0.25 m (0.8 ft) south of the north side of the dock.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 6
Station ID: 9753641 PUBLICATION DATE: 11/03/2011
Name: NAGUABO
PR
NOAA Chart: 25665 Latitude: 18° 11.2' N ( 18.18706)
USGS Quad: NAGUABO, P.R. Longitude: 65° 42.7' W ( -65.71139)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: NO 5 1975
DESIGNATION: 975 3634 TIDAL 5
MONUMENTATION: Bench Mark disk VM#: 20043
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete curb OPUS PID:
LATITUDE: 18° 11.3' N ( 18.18856) LONGITUDE: 65° 42.7' W ( -65.71147)
The bench mark is a disk set in a curb at a street intersection, 14.34 m (47.0
ft) NW of a light pole across the street, 13.73 m (45.0 ft) NE of, 5.00 m (16.4
ft) NE of the centerline of the waterfront street, 2.15 m (7.1 ft) east of a
storm drain in street gutter and 0.88 m (2.9 ft) SW of a fire hydrant.
BENCH MARK STAMPING: 3641 C 2011
DESIGNATION: 975 3641 C
MONUMENTATION: Bench Mark disk VM#: 20044
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete seawall OPUS PID:
LATITUDE: 18° 11.3' N ( 18.18822) LONGITUDE: 65° 42.7' W ( -65.71142)
The bench mark is set in the concrete cap of a concrete seawall, it is 15.52 m
(50.9 ft) north of the end of the concrete wall near the two story restaurant
building, 12.61 m (41.4 ft) NW of a light pole near the two story restaurant
building, 5.53 m (18.1 ft) west of the face of a curb, 2.21 m (7.3 ft) south of
a light pole on top of a square concrete pedestal on the seawall and 0.46 m (1.5
ft) east of the edge of the seawall.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 6
Station ID: 9753641 PUBLICATION DATE: 11/03/2011
Name: NAGUABO
PR
NOAA Chart: 25665 Latitude: 18° 11.2' N ( 18.18706)
USGS Quad: NAGUABO, P.R. Longitude: 65° 42.7' W ( -65.71139)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 3641 B 2011
DESIGNATION: 975 3641 B
MONUMENTATION: Bench Mark disk VM#: 20045
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete seawall OPUS PID:
LATITUDE: 18° 11.3' N ( 18.18767) LONGITUDE: 65° 42.7' W ( -65.71114)
The bench mark is set in the concrete cap of a concrete seawall, 55.53 m (182.2
ft) north of the north most concrete planter on the half circle plaza at the
entrance to the fishing dock, 21.02 m (69.0 ft) south of the two story
restaurant building, 4.14 m (13.6 ft) west of the edge of the sidewalk and 0.43
m (1.4 ft) east of the edge of the seawall.
BENCH MARK STAMPING: 3641 A 2011
DESIGNATION: 975 3641 A
MONUMENTATION: Bench Mark disk VM#: 20046
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete seawall OPUS PID#: BBCK17
LATITUDE: 18° 11.2' N ( 18.18719) LONGITUDE: 65° 42.7' W ( -65.71089)
The bench mark is set in the concrete cap of a concrete seawall in a half circle
plaza at the entrance to the fisherman's dock, 15.84 m (52.0 ft) SW of a fire
hydrant, 12.69 m (41.6 ft) NW of the south most light pole on the plaza on a
square concrete pedestal, 10.01 m (32.8 ft) west of the face of a curb, 2.65 m
(8.7 ft) north of the center of the top stair leading down to dock and 0.65 m
(2.1 ft) east of the edge of the seawall.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 6
Station ID: 9753641 PUBLICATION DATE: 11/03/2011
Name: NAGUABO
PR
NOAA Chart: 25665 Latitude: 18° 11.2' N ( 18.18706)
USGS Quad: NAGUABO, P.R. Longitude: 65° 42.7' W ( -65.71139)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 3641 D 2011
DESIGNATION: 975 3641 D
MONUMENTATION: Bench Mark disk VM#: 20047
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete seawall OPUS PID:
LATITUDE: 18° 11.3' N ( 18.18861) LONGITUDE: 65° 42.7' W ( -65.71175)
The bench mark is set in the concrete cap of a concrete seawall, 16.69 m (54.8
ft) SW of a concrete light post across the street, 7.96 m (26.1 ft) SW of the
face of a curb, 6.10 m (20.0 ft) west of concrete planter at the east corner of
the half circle veranda, 4.92 m (16.1 ft) south of a concrete planter at the
west corner of the half circle veranda and 0.49 m (1.6 ft) NNE of the edge of
the seawall.
BENCH MARK STAMPING: 3641 E 2011
DESIGNATION: 975 3641 E
MONUMENTATION: Bench Mark disk VM#: 20048
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete seawall OPUS PID:
LATITUDE: 18° 11.4' N ( 18.18917) LONGITUDE: 65° 42.7' W ( -65.71242)
The bench mark is set in the concrete cap of a concrete seawall, 13.88 m (45.5
ft) south of a concrete light and power pole near a street intersection, 6.95 m
(22.8 ft) WNW of a break in the concrete seawall, 6.65 m (21.8 ft) west of a
manhole in the sidewalk, 6.32 m (20.7 ft) ESE of the base of a small concrete
ramp to an octagonal covered patio, 0.10 m (0.3 ft) SW of a 0.90 m (3.0 ft)
square concrete pillar that is 3.0 m (9.8 ft) tall, 0.10 m (0.3 ft) NE of the
end of a concrete bench and 0.43 m (1.4 ft) lower than the concrete bench.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 6
Station ID: 9753641 PUBLICATION DATE: 11/03/2011
Name: NAGUABO
PR
NOAA Chart: 25665 Latitude: 18° 11.2' N ( 18.18706)
USGS Quad: NAGUABO, P.R. Longitude: 65° 42.7' W ( -65.71139)
T I D A L D A T U M S
Tidal datums at NAGUABO based on:
LENGTH OF SERIES: 3 MONTHS
TIME PERIOD: June 2011 - August 2011
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION: 9751639 CHARLOTTE AMALIE, ST. THOMAS
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
MEAN HIGHER HIGH WATER MHHW = 0.248
MEAN HIGH WATER MHW = 0.230
MEAN TIDE LEVEL MTL = 0.127
MEAN SEA LEVEL MSL = 0.118
MEAN LOW WATER MLW = 0.023
MEAN LOWER LOW WATER MLLW = 0.000
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
NO 3 1975 0.924 0.694
NO 5 1975 2.712 2.482
3641 C 2011 1.775 1.545
3641 B 2011 1.507 1.277
3641 A 2011 2.081 1.851
3641 D 2011 4.329 4.099
3641 E 2011 2.832 2.602
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 6
Station ID: 9753641 PUBLICATION DATE: 11/03/2011
Name: NAGUABO
PR
NOAA Chart: 25665 Latitude: 18° 11.2' N ( 18.18706)
USGS Quad: NAGUABO, P.R. Longitude: 65° 42.7' W ( -65.71139)
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.