U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 7
Station ID: 9757487 PUBLICATION DATE: 07/22/2021
Name: PONCE
PR
NOAA Chart: 25683 Latitude: 17° 58.2' N ( 17.96958)
USGS Quad: PONCE Longitude: 66° 37.2' W ( -66.61986)
To reach the tidal bench marks from the interchange for PR-52 and PR-12, proceed
south 2.1 km (1.3 mi) on PR-12 / Avenida Malec n to the entrance to the port,
follow the road as it turns to the left and becomes Calle A 0.1 km (0.06 mi)
south, turn right and proceed west and then north 0.8 km (0.5 mi) on an unnamed
port access road past the warehouses to the north side of the pier. The bench
marks are along the concrete bulkhead, PR-12 and PR-52 west of the interchange
with PR-12. The tide gauge is located approximately 500 ft east from the west
end of the pier.
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 7
Station ID: 9757487 PUBLICATION DATE: 07/22/2021
Name: PONCE
PR
NOAA Chart: 25683 Latitude: 17° 58.2' N ( 17.96958)
USGS Quad: PONCE Longitude: 66° 37.2' W ( -66.61986)
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: PH 2 1965
DESIGNATION: PH 2
MONUMENTATION: Survey disk VM#: 23552
AGENCY: USACE IDB PID#: DO1342
SETTING CLASSIFICATION: Bulkhead OPUS PID#: DO1342
LATITUDE: 17° 58.2' N ( 17.97032) LONGITUDE: 66° 37.1' W ( -66.61850)
The primary bench mark is a disk set in the north concrete bulkhead in the Port
of Ponce facility, 39.24 m (128.0 ft) NW of light pole with yellow concrete
base, 16.94 m (55.1 ft) north of corner of brown building on north side of 2
story structure, 14.99 m (49.2 ft) west of 1.07 m (3.5 ft) high yellow painted
metal rolling container crane bumper on end of track and 3.31 m (11.2 ft) west
of a grey bollard set 0.73 m (2.4 ft) high on concrete.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 7
Station ID: 9757487 PUBLICATION DATE: 07/22/2021
Name: PONCE
PR
NOAA Chart: 25683 Latitude: 17° 58.2' N ( 17.96958)
USGS Quad: PONCE Longitude: 66° 37.2' W ( -66.61986)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: PH 1 1963
DESIGNATION: PH 1
MONUMENTATION: Survey disk VM#: 23553
AGENCY: USACE IDB PID#: TV0001
SETTING CLASSIFICATION: Pier OPUS PID#: TV0001
LATITUDE: 17° 58.1' N ( 17.96886) LONGITUDE: 66° 37.3' W ( -66.62118)
The bench mark is a disk in a concrete pier near the west point of the Port of
Ponce, 34.85 m (113.8 ft) west of NW corner of a 27.0 m (90 ft) x 129 m (425 ft)
warehouse in disrepair, 4.20 m (13.8 ft) SW of a 0.65 m (2.1 ft) high red
bollard adjacent to seawall of the western most edge of wall, 3.77 m (12.4 ft)
NE of red indicator light set on west side seawall corner and 1.05 m (3.4 ft)
south of the NW edge of the pier.
BENCH MARK STAMPING: BM 2 1971
DESIGNATION: 975 7487 Tidal 2
MONUMENTATION: Tidal Station disk VM#: 23554
AGENCY: CGS (US Coast and Geodetic Survey) IDB PID#: TV0002
SETTING CLASSIFICATION: Seawall OPUS PID#: TV0002
LATITUDE: 17° 58.1' N ( 17.96833) LONGITUDE: 66° 37.2' W ( -66.62053)
The bench mark is a disk set in a concrete bulkhead just south of the west most
corner of the Port of Ponce facility, 45.39 m (148.9 ft) SW of the upper seaward
edge of the SW corner of a 27.0 m (90 ft) x 129 m (425 ft) warehouse in
disrepair, 18.64 m (61.0 ft) SSE of a 0.69 m (2.3 ft) high red bollard on top of
seawall, 8.80 m (28.5 ft) WSW of a 2.44 m (8.0 ft) high wall with barb wire on
top of wall, 2.48 m (8.1 ft) SW of a 0.57 m (1.9 ft) diameter sewer manhole
cover set in the adjacent road and 0.62 m (2.0 ft) above ground level.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 7
Station ID: 9757487 PUBLICATION DATE: 07/22/2021
Name: PONCE
PR
NOAA Chart: 25683 Latitude: 17° 58.2' N ( 17.96958)
USGS Quad: PONCE Longitude: 66° 37.2' W ( -66.61986)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: PBR 204 1987
DESIGNATION: PBR 204
MONUMENTATION: Survey disk VM#: 23555
AGENCY: USACE IDB PID#: DO1341
SETTING CLASSIFICATION: Sidewalk OPUS PID:
LATITUDE: 17° 58.7' N ( 17.97774) LONGITUDE: 66° 36.6' W ( -66.61066)
The bench mark is a disk set in a concrete sidewalk at the entrance road to
PR-12 Northbound from Avenue Caribe, 60.35 m (197.8 ft) west of the SW corner of
gas station building, 23.50 m (77.1 ft) NE of a white 'no u-turn' sign in road
median adjacent to sidewalk, 5.45 m (18.0 ft) ESE of light pole set in concrete
on the north side of Avenue Caribe and 1.68 m (5.5 ft) NE of the sidewalk curb.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 7
Station ID: 9757487 PUBLICATION DATE: 07/22/2021
Name: PONCE
PR
NOAA Chart: 25683 Latitude: 17° 58.2' N ( 17.96958)
USGS Quad: PONCE Longitude: 66° 37.2' W ( -66.61986)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: C 1012 2008
DESIGNATION: C 1012
MONUMENTATION: Vertical Control disk VM#: 23556
AGENCY: National Geodetic Survey (NGS) IDB PID#: DO1298
SETTING CLASSIFICATION: OPUS PID#: DO1298
LATITUDE: 17° 59.2' N ( 17.98738) LONGITUDE: 66° 36.8' W ( -66.61337)
The bench mark is a disk set in a concrete cylinder in a grassy road shoulder on
the south side of of PR-52, 64.15 m (210.3 ft) west of the 105.3 km (65.4 mi)
marker sign on the north side of PR-52, 29.13 m (95.5 ft) east of a concrete
light post near road entrance to PR-52 on northbound side, 10.86 m (35.8 ft)
west of a light post set on concrete footer in grass shoulder on the same side
of the bench mark and 0.84 m (2.8 ft) SSW of a yellow concrete curb for PR-12.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 7
Station ID: 9757487 PUBLICATION DATE: 07/22/2021
Name: PONCE
PR
NOAA Chart: 25683 Latitude: 17° 58.2' N ( 17.96958)
USGS Quad: PONCE Longitude: 66° 37.2' W ( -66.61986)
T I D A L D A T U M S
Tidal datums at PONCE based on:
LENGTH OF SERIES: 3 MONTHS
TIME PERIOD: December 2020 - February 2021
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 HIGH WATER MHW = 0.213
MEAN HIGHER HIGH WATER MHHW = 0.210
MEAN TIDE LEVEL MTL = 0.107
MEAN SEA LEVEL MSL = 0.103
MEAN LOW WATER MLW = 0.001
MEAN LOWER LOW WATER MLLW = 0.000
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
PH 2 1965 1.836 1.623
PH 1 1963 1.734 1.521
BM 2 1971 2.315 2.102
PBR 204 1987 2.488 2.275
C 1012 2008 7.311 7.098
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 7 of 7
Station ID: 9757487 PUBLICATION DATE: 07/22/2021
Name: PONCE
PR
NOAA Chart: 25683 Latitude: 17° 58.2' N ( 17.96958)
USGS Quad: PONCE Longitude: 66° 37.2' W ( -66.61986)
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.