U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 5
Station ID: 9755679 PUBLICATION DATE: 06/18/2010
Name: LAS MAREAS
PR
NOAA Chart: 25677 Latitude: 17° 55.7' N ( 17.92830)
USGS Quad: CENTRAL AQUIRRE Longitude: 66° 9.5' W ( -66.15830)
To reach the tidal bench marks from the intersection of Routes 14 and 52 in
Ponce, proceed north on Highway 52 for 44.9 km (27.9 mi) to the intersection of
Highway 52 and 53, exit onto Highway 53 East (Guyama), follow exit and onto
Highway 53 to a $0.25 toll plaza, then continue east on Highway 53 for 9.4 km
(5.8 mi) to the third/south exit (#83), and at the bottom of the exit ramp turn
right on Highway 7707 South, continue for 3.9 km (2.4 mi) to the only traffic
light at the intersection of Highways 7707 and 3, then continue south/straight
for 1.8 km (1.1 mi) to a "T" in the dirt road, bear left/east for 0.2 km (0.1
mi), then bear right/south at the next intersection and proceed 0.5 km (0.3 mi)
to the Port entrance. Bear left into the Port and continue straight SE for 1.1
km (0.7 mi) to the beach. The bench marks are at the outer end of the rock jetty
at the harbor entrance. The tide gage was also located at the end of the jetty.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: OLA GRANDE 1975
DESIGNATION: 975 5679 OLE GRANDE
MONUMENTATION: Survey disk VM#: 16439
AGENCY: National Ocean Survey (NOS) IDB PID#:
SETTING CLASSIFICATION: Tower foundation OPUS PID:
LATITUDE: 17° 55.7' N ( 17.92830) LONGITUDE: 66° 9.6' W ( -66.16000)
The primary bench mark is set in the approximate center of a foundation for the
steel range tower at the end of the rock jetty at the harbor entrance, 2.55 m
(8.4 ft) ESE of the NE tower support leg, 2.45 m (8.0 ft) north of the most
southern tower support leg, and 1.95 m (6.4 ft) WNW of the center of the fence
door.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 5
Station ID: 9755679 PUBLICATION DATE: 06/18/2010
Name: LAS MAREAS
PR
NOAA Chart: 25677 Latitude: 17° 55.7' N ( 17.92830)
USGS Quad: CENTRAL AQUIRRE Longitude: 66° 9.5' W ( -66.15830)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 5679 B 2001
DESIGNATION: 975 5679 B
MONUMENTATION: Tidal Station disk VM#: 16441
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Jetty boulder OPUS PID:
LATITUDE: 17° 55.7' N ( 17.92830) LONGITUDE: 66° 9.6' W ( -66.16000)
The bench mark is a disk set in the top of a granite boulder on the SW end of
the rock jetty, 14.70 m (48.2 ft) east of the most southern corner of the fence
around the range tower base, 13.87 m (45.5 ft) east of bench mark OLA GRANDE
1975, 10.45 m (34.3 ft) east of the NE corner of the fence, and 0.70 m (2.3 ft)
north of the south edge of the boulder it is set in. The boulder is also marked
"B" with fluorescent paint.
BENCH MARK STAMPING: 5679 C 2001
DESIGNATION: 975 5679 C
MONUMENTATION: Tidal Station disk VM#: 16442
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Jetty boulder OPUS PID:
LATITUDE: 17° 55.7' N ( 17.92830) LONGITUDE: 66° 9.6' W ( -66.16000)
The bench mark is a disk set in top of a granite boulder, 36.05 m (118.3 ft)
east of the most southerly corner of the fence around the range tower base,
31.25 m (102.5 ft) east of the NE corner of the fence, 21.40 m (70.2 ft) east of
bench mark 5679 B 2001, and 0.79 m (2.6 ft) north of the south edge of the
boulder the mark is set in. The boulder is also marked "C" with fluorescent
paint.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 5
Station ID: 9755679 PUBLICATION DATE: 06/18/2010
Name: LAS MAREAS
PR
NOAA Chart: 25677 Latitude: 17° 55.7' N ( 17.92830)
USGS Quad: CENTRAL AQUIRRE Longitude: 66° 9.5' W ( -66.15830)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 5679 A 2001
DESIGNATION: 975 5679 A
MONUMENTATION: Tidal Station disk VM#: 16443
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Jetty boulder OPUS PID:
LATITUDE: 17° 55.7' N ( 17.92830) LONGITUDE: 66° 9.6' W ( -66.16000)
The bench mark is a disk set in the top of a granite boulder on the north side
of the jetty (harbor side), 10.65 m (34.9 ft) WNW of the NE corner of the fence
around the range tower, 7.80 m (25.6 ft) WNW of the NW corner of the fence, and
1.06 m (3.5 ft) south of the north edge of the boulder. The boulder is
additionally marked (in March 2001) with an "A" in fluorescent paint in two
places.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 5
Station ID: 9755679 PUBLICATION DATE: 06/18/2010
Name: LAS MAREAS
PR
NOAA Chart: 25677 Latitude: 17° 55.7' N ( 17.92830)
USGS Quad: CENTRAL AQUIRRE Longitude: 66° 9.5' W ( -66.15830)
T I D A L D A T U M S
Tidal datums at LAS MAREAS based on:
LENGTH OF SERIES: 2 MONTHS
TIME PERIOD: April 2001 - May 2001
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 = 0.203
MEAN HIGH WATER MHW = 0.201
MEAN TIDE LEVEL MTL = 0.104
MEAN SEA LEVEL MSL = 0.100
MEAN LOW WATER MLW = 0.006
MEAN LOWER LOW WATER MLLW = 0.000
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
OLA GRANDE 1975 5.985 5.784
5679 B 2001 6.169 5.968
5679 C 2001 5.944 5.743
5679 A 2001 2.809 2.608
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 5
Station ID: 9755679 PUBLICATION DATE: 06/18/2010
Name: LAS MAREAS
PR
NOAA Chart: 25677 Latitude: 17° 55.7' N ( 17.92830)
USGS Quad: CENTRAL AQUIRRE Longitude: 66° 9.5' W ( -66.15830)
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.