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Datums Page Page 1 of 9
Station ID: 9755371 PUBLICATION DATE: 10/24/2011
Name: SAN JUAN, LA PUNTILLA, SAN JUAN BAY
PR
NOAA Chart: 25670 Latitude: 18° 27.5' N ( 18.45894)
USGS Quad: SAN JUAN Longitude: 66° 7.0' W ( -66.11642)
To reach the tidal bench marks from the Cruise Ship Terminal in Old San Juan,
proceed to the US Custom Service building, turn left and proceed 0.5 km (0.3 mi)
to the US Coast Guard Base entrance. The bench marks are on the U.S. Coast Guard
compound. The tide gage and staff are on the southern tip of the U.S. Coast
Guard compound.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 5371 A 1977
DESIGNATION: 975 5371 A TIDAL
MONUMENTATION: Tidal Station disk VM#: 1386
AGENCY: National Ocean Survey (NOS) IDB PID#: TV1513
SETTING CLASSIFICATION: Concrete sea wall OPUS PID:
LATITUDE: 18° 27.5' N ( 18.45894) LONGITUDE: 66° 7.0' W ( -66.11642)
The primary bench mark is a disk set in the top of the concrete sea wall at the
SW corner of the U.S. Coast Guard Compound, 16.58 m (54.4 ft) SE of the concrete
steps leading to the water, 5.30 m (17.4 ft) west of the SW corner of the NOS
Tide House, 0.94 m (3.1 ft) north of the south face of the sea wall, and 0.24 m
(0.8 ft) above the ground.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 9
Station ID: 9755371 PUBLICATION DATE: 10/24/2011
Name: SAN JUAN, LA PUNTILLA, SAN JUAN BAY
PR
NOAA Chart: 25670 Latitude: 18° 27.5' N ( 18.45894)
USGS Quad: SAN JUAN Longitude: 66° 7.0' W ( -66.11642)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 5371 B 1977
DESIGNATION: 975 5371 B TIDAL
MONUMENTATION: Tidal Station disk VM#: 1390
AGENCY: National Ocean Survey (NOS) IDB PID#: AA7649
SETTING CLASSIFICATION: Concrete slab OPUS PID:
LATITUDE: 18° 27.7' N ( 18.46175) LONGITUDE: 66° 7.0' W ( -66.11611)
The bench mark is a disk set in a concrete slab at the SE side of the U.S. Coast
Guard Compound, 22.25 m (73.0 ft) NW of the concrete sea wall of Berth 3, 8.84 m
(29.0 ft) east of the SE corner of a small boat repair shop, and 0.79 m (2.6 ft)
south of the SW corner of a transformer shelter.
BENCH MARK STAMPING: 5371 J 1977
DESIGNATION: 975 5371 J TIDAL
MONUMENTATION: Tidal Station disk VM#: 1397
AGENCY: National Ocean Survey (NOS) IDB PID#: AA7652
SETTING CLASSIFICATION: Concrete step OPUS PID:
LATITUDE: 18° 27.7' N ( 18.46122) LONGITUDE: 66° 7.0' W ( -66.11667)
The bench mark is a disk set in the lower concrete step at the east entrance to
Building No. 36 (Health Services), 26.91 m (88.3 ft) south of the west entrance
gate, 14.75 m (48.4 ft) SSE of the entrance to the Engineering Department
Building, and 9.75 m (32.0 ft) west of the centerline of the road and flush with
the ground.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 9
Station ID: 9755371 PUBLICATION DATE: 10/24/2011
Name: SAN JUAN, LA PUNTILLA, SAN JUAN BAY
PR
NOAA Chart: 25670 Latitude: 18° 27.5' N ( 18.45894)
USGS Quad: SAN JUAN Longitude: 66° 7.0' W ( -66.11642)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: SJH-44 COE 1991
DESIGNATION: 975 5371 SJH-44
MONUMENTATION: Survey disk VM#: 13768
AGENCY: US Army Corps of Engineers (USE) IDB PID#: DE5461
SETTING CLASSIFICATION: Concrete bulkhead OPUS PID:
LATITUDE: 18° 27.5' N ( 18.45894) LONGITUDE: 66° 7.0' W ( -66.11642)
The bench mark is a disk set in a concrete bulkhead at the NW corner of the NOS
tide house, 5.00 m (16.4 ft) south of the SW corner of a chainlink fence, 3.05 m
(10.0 ft) SE of bench mark 5371 A 1977, 1.10 m (3.6 ft) ENE of the south face of
the bulkhead, 1.10 m (3.6 ft) NW of the NW corner of the tide house, and at
ground level.
BENCH MARK STAMPING: 5371 L 1998
DESIGNATION: 975 5371 L
MONUMENTATION: Tidal Station disk VM#: 13951
AGENCY: National Ocean Service (NOS) IDB PID#: DE5462
SETTING CLASSIFICATION: Concrete stonewall OPUS PID:
LATITUDE: 18° 27.6' N ( 18.45986) LONGITUDE: 66° 7.0' W ( -66.11664)
The bench mark is a disk set in a concrete stone wall on the west side of the
U.S. Coast Guard base near the Engineering building, 28.50 M (93.50 FT) SE of a
flag pole on the south side of a two story white building with wrap around the
balcony, 22.90 M (75.13 FT) north of a red fire hydrant and 6.00 M (19.68 FT)
NNW of the NW corner of the engineering building, and 0.70 M (2.30 FT) above the
parking lot.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 9
Station ID: 9755371 PUBLICATION DATE: 10/24/2011
Name: SAN JUAN, LA PUNTILLA, SAN JUAN BAY
PR
NOAA Chart: 25670 Latitude: 18° 27.5' N ( 18.45894)
USGS Quad: SAN JUAN Longitude: 66° 7.0' W ( -66.11642)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 5371 M 2000
DESIGNATION: 975 5371 M
MONUMENTATION: Tidal Station disk VM#: 16270
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete bulkhead OPUS PID#: DO1557
LATITUDE: 18° 27.6' N ( 18.45917) LONGITUDE: 66° 7.0' W ( -66.11606)
The bench mark is a disk set in the concrete bulkhead on the south side of the
base near the NOAA tide Station, 17.80 m (58.4 ft) SSE of the south side of the
tank storage shelter, 15.00 m (49.2 ft) west of the 4th bollard from the SW
corner of the dock, 4.57 m (15.00 ft) NE of the 3rd bollard from the SW end of
the dock, 0.80 m (2.6 ft) NW of the south side of the bulkhead face, and 0.26 m
(0.9 ft) above the concrete deck.
BENCH MARK STAMPING: 5371 N 2005
DESIGNATION: 975 5371 N
MONUMENTATION: Tidal Station disk VM#: 17809
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete bulkhead OPUS PID:
LATITUDE: 18° 27.6' N ( 18.46006) LONGITUDE: 66° 6.9' W ( -66.11558)
The bench mark is a disk set in a concrete bulkhead cap located on the east side
of the coast guard property, 55.82 m (183.1 ft) ESE from the SE corner of the
mat building, 55.0 m (180.4 ft) west of the end of Finger Pier, 32.45 m (106.5
ft) north of the centerline of the most southern Finger Pier, and 2.85 m (9.4
ft) south of the centerline of the second Finger Pier.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 9
Station ID: 9755371 PUBLICATION DATE: 10/24/2011
Name: SAN JUAN, LA PUNTILLA, SAN JUAN BAY
PR
NOAA Chart: 25670 Latitude: 18° 27.5' N ( 18.45894)
USGS Quad: SAN JUAN Longitude: 66° 7.0' W ( -66.11642)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 5371 P 2005
DESIGNATION: 975 5371 P
MONUMENTATION: Tidal Station disk VM#: 17810
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Concrete pad OPUS PID:
LATITUDE: 18° 27.6' N ( 18.46075) LONGITUDE: 66° 7.0' W ( -66.11589)
The bench mark is a disk set in the SW corner of the concrete pad for a
generator and storage tanks for Bildge Oil located on the NE corner of the US
Coast Guard station property, 41.40 m (135.8 ft) WSW from the bulkhead face on
the east side of the Coast Guard base, 16.36 m (53.7 ft) ESE from the NE corner
of the Response building, 14.22 m (46.6 ft) ENE from the east face of the
Response building, 11.90 m (39.0 ft) SSE of the chain link fence running along
the north side of the property, and 0.32 m (1.0 ft) above the ground.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 9
Station ID: 9755371 PUBLICATION DATE: 10/24/2011
Name: SAN JUAN, LA PUNTILLA, SAN JUAN BAY
PR
NOAA Chart: 25670 Latitude: 18° 27.5' N ( 18.45894)
USGS Quad: SAN JUAN Longitude: 66° 7.0' W ( -66.11642)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 15 1992
DESIGNATION: USCG 15
MONUMENTATION: Tidal Station disk VM#: 18069
AGENCY: National Ocean Service (NOS) IDB PID#:
SETTING CLASSIFICATION: Road OPUS PID:
LATITUDE: 18° 27.6' N ( 18.46042) LONGITUDE: 66° 7.0' W ( -66.11672)
The bench mark is a disk set with the road surface located in the entrance road
leading into the base and near the SW corner of the Navy Exchange Building,
18.56 m (68.9 ft) NW of the NW end of a concrete and stone wall, 6.11 m (20.0
ft) WSW of a concrete lamp post, and 2.90 m (9.5 ft) east of the SW corner of
the exchange building.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 7 of 9
Station ID: 9755371 PUBLICATION DATE: 10/24/2011
Name: SAN JUAN, LA PUNTILLA, SAN JUAN BAY
PR
NOAA Chart: 25670 Latitude: 18° 27.5' N ( 18.45894)
USGS Quad: SAN JUAN Longitude: 66° 7.0' W ( -66.11642)
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: USCG 4 1992
DESIGNATION: USCG 4
MONUMENTATION: Survey disk VM#: 18286
AGENCY: US Army Corps of Engineers (USE) IDB PID#:
SETTING CLASSIFICATION: Bulkhead OPUS PID:
LATITUDE: 18° 27.6' N ( 18.45919) LONGITUDE: 66° 7.0' W ( -66.11669)
The bench mark is a disk set in the top of a concrete retaining wall by the
water's edge at the SW corner of the US Coast Guard compound, ESE of concrete
boat ramp, 18.92 m (62.1 ft) north of the bottom southern step of concrete boat
landing steps, 9.0 m (29.5 ft) west of the west face of fire hydrant east of a
concrete sea wall, 2.75 m (9.0 ft) WSW of the west face of a 40 foot (12.2 m)
concrete camra pole, 0.11 m (0.36 ft) east of the west face of a concrete
retaining sea wall that is running north-south and near the northern end of sea
wall, 0.18 m (0.59 ft) above ground.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 8 of 9
Station ID: 9755371 PUBLICATION DATE: 10/24/2011
Name: SAN JUAN, LA PUNTILLA, SAN JUAN BAY
PR
NOAA Chart: 25670 Latitude: 18° 27.5' N ( 18.45894)
USGS Quad: SAN JUAN Longitude: 66° 7.0' W ( -66.11642)
T I D A L D A T U M S
Tidal datums at SAN JUAN, LA PUNTILLA, SAN JUAN BAY based on:
LENGTH OF SERIES: 19 YEARS
TIME PERIOD: January 1983 - December 2001
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION:
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
HIGHEST OBSERVED WATER LEVEL (09/18/1989) = 1.324
MEAN HIGHER HIGH WATER MHHW = 0.480
MEAN HIGH WATER MHW = 0.400
MEAN SEA LEVEL MSL = 0.234
Puerto Rico Vertical Datum of 2002 PRVD02 = 0.234
MEAN TIDE LEVEL MTL = 0.232
MEAN LOW WATER MLW = 0.063
MEAN LOWER LOW WATER MLLW = 0.000
LOWEST OBSERVED WATER LEVEL (12/20/1968) = -0.331
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
5371 A 1977 1.568 1.168
5371 B 1977 1.656 1.256
5371 J 1977 1.749 1.349
SJH-44 COE 1991 1.533 1.133
5371 L 1998 2.536 2.136
5371 M 2000 1.704 1.304
5371 N 2005 1.843 1.443
5371 P 2005 2.110 1.710
15 1992 1.487 1.087
USCG 4 1992 1.595 1.195
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 9 of 9
Station ID: 9755371 PUBLICATION DATE: 10/24/2011
Name: SAN JUAN, LA PUNTILLA, SAN JUAN BAY
PR
NOAA Chart: 25670 Latitude: 18° 27.5' N ( 18.45894)
USGS Quad: SAN JUAN Longitude: 66° 7.0' W ( -66.11642)
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.
Station Location
Published bench mark
Unpublished bench mark
