U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 6 Station ID: 9752235 PUBLICATION DATE: 06/03/2020 Name: CULEBRA PR NOAA Chart: 25653 Latitude: 18° 18.1' N ( 18.30086) USGS Quad: CULEBRA AND ADJACENT ISLANDS Longitude: 65° 18.1' W ( -65.30247) On the island of Culebra, Puerto Rico, in the town of Dewey, at the Culebra ferry terminal, station is located on the waters edge, being a white aluminum enclosure mounted on aluminum stand. T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: 2235 D 2005 DESIGNATION: 975 2235 D MONUMENTATION: Tidal Station disk VM#: 17958 AGENCY: National Ocean Service (NOS) IDB PID#: DN8624 SETTING CLASSIFICATION: Concrete bulkhead OPUS PID#: DN8624 LATITUDE: 18° 18.1' N ( 18.30114) LONGITUDE: 65° 18.1' W ( -65.30250) The primary bench mark is a NOS disk set flush in the concrete bulkhead located 7.57 m (24.8 ft) ESE of the south end of the bottom step of six steps leading to the water, 3.90 m (12.8 ft) south of the north face of a 1.1 m (3.6 ft) high block wall, 3.05 m (10.0 ft) west of the east face of the terminal building. BENCH MARK STAMPING: 2235 B 2005 DESIGNATION: 975 2235 B MONUMENTATION: Tidal Station disk VM#: 17956 AGENCY: National Ocean Service (NOS) IDB PID#: DN8622 SETTING CLASSIFICATION: Concrete bulkhead OPUS PID: LATITUDE: 18° 18.1' N ( 18.30108) LONGITUDE: 65° 18.1' W ( -65.30222) The bench mark is a disk set flush in the concrete bulkhead located 18.10 m (59.4 ft) SW of the SW corner of Culebra divers store, 9.92 m (32.6 ft) SE of the NE corner of the ticket office of the ferry terminal, 3.70 m (12.1 ft) west of two gas hoses, and 0.3 m (1.0 ft) below the street level.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 6 Station ID: 9752235 PUBLICATION DATE: 06/03/2020 Name: CULEBRA PR NOAA Chart: 25653 Latitude: 18° 18.1' N ( 18.30086) USGS Quad: CULEBRA AND ADJACENT ISLANDS Longitude: 65° 18.1' W ( -65.30247) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 2235 C 2005 DESIGNATION: 975 2235 C MONUMENTATION: Tidal Station disk VM#: 17957 AGENCY: National Ocean Service (NOS) IDB PID#: DN8623 SETTING CLASSIFICATION: Concrete manhole OPUS PID: LATITUDE: 18° 18.1' N ( 18.30106) LONGITUDE: 65° 18.1' W ( -65.30200) The bench mark is a disk set flush in concrete 11.4 m (37.4 ft) SE of a concrete structure corner, 9.9 m (32.5 ft) SW of Ricky's Service Station, 5.97 m (19.6 ft) SE of a concrete power pole, 3.10 m (10.2 ft) NE of the water's edge, and 2.12 m (7.0 ft) west of the east face of the Garaje Ricky building. BENCH MARK STAMPING: 2235 F 2006 DESIGNATION: 975 2235 F MONUMENTATION: Tidal Station disk VM#: 18237 AGENCY: National Ocean Service (NOS) IDB PID#: DN8626 SETTING CLASSIFICATION: Sidewalk OPUS PID: LATITUDE: 18° 18.1' N ( 18.30181) LONGITUDE: 65° 18.2' W ( -65.30261) The BM is a disk set flush in the concrete sidewalk on the NW side of the ramp by some concrete benches, located 29.05 m (95.31 ft) NW of BM 2235 E, 23.73 m (77.8 ft) WNW of the center of the road leading into town, 11.49 m (37.7 ft) west of the center of some concrete steps leading to the water, and 0.65 m (2.1 ft) south of a concrete wall.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 6 Station ID: 9752235 PUBLICATION DATE: 06/03/2020 Name: CULEBRA PR NOAA Chart: 25653 Latitude: 18° 18.1' N ( 18.30086) USGS Quad: CULEBRA AND ADJACENT ISLANDS Longitude: 65° 18.1' W ( -65.30247) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 2235 G 2007 DESIGNATION: 975 2235 G MONUMENTATION: Tidal Station disk VM#: 18308 AGENCY: National Ocean Service (NOS) IDB PID#: DN8627 SETTING CLASSIFICATION: Sidewalk OPUS PID: LATITUDE: 18° 18.1' N ( 18.30189) LONGITUDE: 65° 18.1' W ( -65.30231) The bench mark is a disk set flush in a concrete slab near a concrete wall 0.55 m (1.8 ft) high, 4.5 m (14.8 ft) long, running north and south and splitting the sidewalk by the Bienvenidos A Culebra building, 22.0 m (72.2 ft) west of the center line of the road leading to the cargo ferry ramp, 7.9 m (25.9 ft) NE of a light pole, 6.7 m (22.0 ft) NW of a tree, and 1.9 m (6.2 ft) north of the PR-250 curb and gutter. BENCH MARK STAMPING: 2235 H 2008 DESIGNATION: 975 2235 H MONUMENTATION: Tidal Station disk VM#: 18683 AGENCY: National Ocean Service (NOS) IDB PID#: DN8628 SETTING CLASSIFICATION: Step OPUS PID: LATITUDE: 18° 18.1' N ( 18.30192) LONGITUDE: 65° 18.1' W ( -65.30194) The benchmark is a disk set in a concrete slab footing and step of the Culebra Pissa on the SW side of the Isla del Culebra Pissa ve Pizza, 19.67 m (64.5 ft) south from the south side of the Golden China, 6.27 m (20.6 ft) east from the center line of Rt. Este 250, 0.33 m (1.08 ft) north from the SW end of Isla del Culebra Pizza, and 0.20 m (0.66 ft) above the ground.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 6 Station ID: 9752235 PUBLICATION DATE: 06/03/2020 Name: CULEBRA PR NOAA Chart: 25653 Latitude: 18° 18.1' N ( 18.30086) USGS Quad: CULEBRA AND ADJACENT ISLANDS Longitude: 65° 18.1' W ( -65.30247) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 2235 K 2009 DESIGNATION: 975 2235 K MONUMENTATION: Tidal Station disk VM#: 19224 AGENCY: National Ocean Service (NOS) IDB PID#: DO1533 SETTING CLASSIFICATION: Sidewalk OPUS PID#: DO1533 LATITUDE: 18° 18.2' N ( 18.30261) LONGITUDE: 65° 18.1' W ( -65.30133) The bench mark is a disk set in a concrete slab next to a set of three steps leading to a church on SR-250, 7.43 m (24.38 ft) NNW of the centerline of SR-250, 4.78 m (15.68 ft) NNE of the north face of a wall of the church that runs east and west parallel to SR-250, .20 m (0.66 ft) SSE of the east face of a wall that runs east and west parallel to SR- 250 and next to a church, .17 m (0.56 ft) SSW of a set of concrete steps leading to a church courtyard, 0.06 m (0.20 ft) above the road on SR-250, set in a concrete sidewalk and flush with the ground. BENCH MARK STAMPING: 2235 M 2019 DESIGNATION: 975 2235 M MONUMENTATION: Bench Mark disk VM#: 23033 AGENCY: National Ocean Service IDB PID: SETTING CLASSIFICATION: Bridge abutment OPUS PID: LATITUDE: 18° 18.1' N ( 18.30219) LONGITUDE: 65° 18.0' W ( -65.29989) The benchmark is brass disk set flush in the NW bridge abutment of the bridge located along Cll Escudero. The disk is 10.30 m (33.8 ft) west of the west face of the NE bridge abutment, 1.20 m (3.9 ft) east of the west edge of the NW bridge abutment, and 0.18 m (2.6 ft) north of the south face of the NW bridge abutment.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 6 Station ID: 9752235 PUBLICATION DATE: 06/03/2020 Name: CULEBRA PR NOAA Chart: 25653 Latitude: 18° 18.1' N ( 18.30086) USGS Quad: CULEBRA AND ADJACENT ISLANDS Longitude: 65° 18.1' W ( -65.30247) T I D A L D A T U M S Tidal datums at CULEBRA based on: LENGTH OF SERIES: 6 YEARS TIME PERIOD: 6/06-5/09, 2/12-1/13, 4/16-3/17, 4/18-3/19 TIDAL EPOCH: 1983-2001 CONTROL TIDE STATION: 9755371 SAN JUAN, LA PUNTILLA, SAN JUAN BAY Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS: HIGHEST OBSERVED WATER LEVEL (09/20/2017) = 0.666 MEAN HIGHER HIGH WATER MHHW = 0.343 MEAN HIGH WATER MHW = 0.280 MEAN TIDE LEVEL MTL = 0.165 MEAN SEA LEVEL MSL = 0.165 Puerto Rico Vertical Datum of 2002 PRVD02 = 0.154 MEAN LOW WATER MLW = 0.050 MEAN LOWER LOW WATER MLLW = 0.000 LOWEST OBSERVED WATER LEVEL (04/28/2009) = -0.187 Bench Mark Elevation Information In METERS above: Stamping or Designation MLLW MHW 2235 D 2005 1.127 0.847 2235 B 2005 1.722 1.442 2235 C 2005 1.715 1.435 2235 F 2006 2.945 2.665 2235 G 2007 3.792 3.512 2235 H 2008 4.564 4.284 2235 K 2009 2.032 1.752 2235 M 2019 3.271 2.990
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 6 of 6 Station ID: 9752235 PUBLICATION DATE: 06/03/2020 Name: CULEBRA PR NOAA Chart: 25653 Latitude: 18° 18.1' N ( 18.30086) USGS Quad: CULEBRA AND ADJACENT ISLANDS Longitude: 65° 18.1' W ( -65.30247) 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.