U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 7 Station ID: 9759938 PUBLICATION DATE: 10/21/2020 Name: MONA ISLAND PR NOAA Chart: 25671 Latitude: 18° 5.4' N ( 18.08992) USGS Quad: ISLA MONA Longitude: 67° 56.3' W ( -67.93850) To reach the bench marks on Mona Island, travel west offshore from Rincon, Puerto Rico, 40 miles (34.8 nm). The bench marks are on the DNRAs pier and the road leading to the pier. DNRA is located on the southwest side of Mona Island and is the only facility on the island. The station is located on the pier and is attached to an abandoned building on the pier. T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: 9938 A 2006 DESIGNATION: 975 9938 A MONUMENTATION: Tidal Station disk VM#: 18192 AGENCY: National Ocean Service IDB PID#: DN8596 SETTING CLASSIFICATION: Concrete pier OPUS PID#: DN8596 LATITUDE: 18° 5.4' N ( 18.08992) LONGITUDE: 67° 56.3' W ( -67.93850) The primary bench mark is a disk located on a concrete pier of the DNR near the tide station. 17.30 m (56.8 ft) WSW of the SW corner of an abandoned building on the pier, 6.20 m (20.3 ft) SW of the NW corner of the pier, and 0.50 m (1.6 ft) SE of the NW face of the pier.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 7 Station ID: 9759938 PUBLICATION DATE: 10/21/2020 Name: MONA ISLAND PR NOAA Chart: 25671 Latitude: 18° 5.4' N ( 18.08992) USGS Quad: ISLA MONA Longitude: 67° 56.3' W ( -67.93850) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 9938 C 2006 DESIGNATION: 975 9938 C MONUMENTATION: Tidal Station disk VM#: 18191 AGENCY: National Ocean Service IDB PID#: DN8598 SETTING CLASSIFICATION: Concrete road OPUS PID: LATITUDE: 18° 5.3' N ( 18.08908) LONGITUDE: 67° 56.3' W ( -67.93806) The bench mark is set in the road leading to the DNR pier, 22.35 m (73.3 ft) NE of the end of the concrete road leading to the pier, 18.10 m (59.4 ft) SSW of the first range marker off the pier, 1.30 m (4.27 ft) NW of the center of the road, 0.20 m (0.7 ft) SE of the NW edge of the road, and flush with the road. BENCH MARK STAMPING: 9938 B 2006 DESIGNATION: 975 9938 B MONUMENTATION: Tidal Station disk VM#: 18193 AGENCY: National Ocean Service IDB PID#: DN8597 SETTING CLASSIFICATION: Concrete road OPUS PID: LATITUDE: 18° 5.4' N ( 18.08922) LONGITUDE: 67° 56.3' W ( -67.93819) The bench mark is set in the road at the DNR pier, 24.80 m (81.4 ft) SE of the NE face of the concrete pier, 17.50 m (57.4 ft) north of the first range marker off the pier, 5.35 m (17.6 ft) NE of the SW face of the pier, 0.50 m (1.64 ft) SW of the SE corner of the building on the pier.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 7 Station ID: 9759938 PUBLICATION DATE: 10/21/2020 Name: MONA ISLAND PR NOAA Chart: 25671 Latitude: 18° 5.4' N ( 18.08992) USGS Quad: ISLA MONA Longitude: 67° 56.3' W ( -67.93850) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 9938 D 2006 DESIGNATION: 975 9938 D MONUMENTATION: Tidal Station disk VM#: 18194 AGENCY: National Ocean Service IDB PID#: DN8599 SETTING CLASSIFICATION: Concrete pad OPUS PID: LATITUDE: 18° 5.3' N ( 18.08856) LONGITUDE: 67° 56.3' W ( -67.93792) The bench mark is set in a 0.55 m (1.80 ft) X 0.65 m (2.13 ft) concrete pad on the DNR property near the camp ground east of the pier, 5.00 m (16.40 ft) west of the eastern most concrete foundation, and 0.30 m (0.98 ft) above ground. BENCH MARK STAMPING: 9938 E 2006 DESIGNATION: 975 9938 E MONUMENTATION: Tidal Station disk VM#: 18195 AGENCY: National Ocean Service IDB PID#: DN8600 SETTING CLASSIFICATION: Concrete Pad OPUS PID: LATITUDE: 18° 5.3' N ( 18.08817) LONGITUDE: 67° 56.3' W ( -67.93836) The bench mark is set in the concrete foundation supporting the steps leading to the camp ground restrooms on the DNR property, 24.00 m (78.7 ft) NE of the SE corner of a ranger office, 10.80 m (35.4 ft) ESE of a DNRA sign, 3.40 m (11.2 ft) SW of the NW corner of the camp restrooms, and 0.50 m (1.6 ft) above ground.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 7 Station ID: 9759938 PUBLICATION DATE: 10/21/2020 Name: MONA ISLAND PR NOAA Chart: 25671 Latitude: 18° 5.4' N ( 18.08992) USGS Quad: ISLA MONA Longitude: 67° 56.3' W ( -67.93850) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 9938 F 2007 DESIGNATION: 975 9938 F MONUMENTATION: Tidal Station disk VM#: 18257 AGENCY: National Ocean Service IDB PID#: DN8601 SETTING CLASSIFICATION: Concrete pad OPUS PID#: DN8601 LATITUDE: 18° 5.3' N ( 18.08764) LONGITUDE: 67° 56.4' W ( -67.93925) The bench mark is set in a concrete foundation for an automotive lift ramp supporting station, located on the NW side of the basketball courts, 17.04 m (55.9 ft) SE of the SE corner of the living quarters located NW of the basketball court, 15.90 m (52.17 ft) north of the SW corner of the basketball court, 11.22 m (36.81 ft) west of the NE corner of the basketball court, 0.20 m (0.6 ft) above the ground, set in an old concrete car lift ramp pad 5.0 m (16.4 ft) x 2.6 m (8.5ft). BENCH MARK STAMPING: 9938 G 2008 DESIGNATION: 975 9938 G MONUMENTATION: Tidal Station disk VM#: 18686 AGENCY: IDB PID#: DN8602 SETTING CLASSIFICATION: Concrete pad OPUS PID: LATITUDE: 18° 5.2' N ( 18.08747) LONGITUDE: 67° 56.3' W ( -67.93881) The benchmark is a disk set in a concrete foundation at the base of a stair case hand rail in the northern most of two residential buildings and closest to the mess hall on the SW side of Mona Island near the basketball court, 31.7 m (104.0 ft) SE of the SE corner of the basketball court, 5.4 m (17.8 ft) SW of the NE corner of a residential building next to the mess hall building, 0.38 m (1.2 ft) south of the NE corner of a concrete foundation at the base of the staircase, 11.58 cm (5 in) above ground.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 7 Station ID: 9759938 PUBLICATION DATE: 10/21/2020 Name: MONA ISLAND PR NOAA Chart: 25671 Latitude: 18° 5.4' N ( 18.08992) USGS Quad: ISLA MONA Longitude: 67° 56.3' W ( -67.93850) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 9938 H 2014 DESIGNATION: 975 9938 H MONUMENTATION: Tidal Station disk VM#: 21136 AGENCY: National Ocean Service IDB PID: SETTING CLASSIFICATION: Concrete Step OPUS PID: LATITUDE: 18° 5.2' N ( 18.08747) LONGITUDE: 67° 56.4' W ( -67.94003) The bench mark is a disk set flush in the steps of the Mona Island research and education building on the SW side of the island, 13.8 m (45.3 ft) south of the SE corner of the building, 7.30 m (24.0 ft) NE of a set of double doors at the entrance to the building, 1.80 m (5.9 ft) north of the NE corner of the building, and set flush in the second step on the NE side of the steps.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 6 of 7 Station ID: 9759938 PUBLICATION DATE: 10/21/2020 Name: MONA ISLAND PR NOAA Chart: 25671 Latitude: 18° 5.4' N ( 18.08992) USGS Quad: ISLA MONA Longitude: 67° 56.3' W ( -67.93850) T I D A L D A T U M S Tidal datums at MONA ISLAND based on: LENGTH OF SERIES: 8 YEARS TIME PERIOD: 03/10-02/17, 04/18-03/19 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: HIGHEST OBSERVED WATER LEVEL (09/21/2017) = 0.880 MEAN HIGHER HIGH WATER MHHW = 0.247 MEAN HIGH WATER MHW = 0.231 MEAN TIDE LEVEL MTL = 0.126 MEAN SEA LEVEL MSL = 0.125 Puerto Rico Vertical Datum of 2002 PRVD02 = 0.124 MEAN LOW WATER MLW = 0.021 MEAN LOWER LOW WATER MLLW = 0.000 LOWEST OBSERVED WATER LEVEL (04/27/2009) = -0.220 Bench Mark Elevation Information In METERS above: Stamping or Designation MLLW MHW 9938 A 2006 1.282 1.051 9938 C 2006 2.395 2.164 9938 B 2006 1.365 1.134 9938 D 2006 3.338 3.107 9938 E 2006 2.968 2.737 9938 F 2007 3.084 2.853 9938 G 2008 2.594 2.363 9938 H 2014 2.377 2.146
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 7 of 7 Station ID: 9759938 PUBLICATION DATE: 10/21/2020 Name: MONA ISLAND PR NOAA Chart: 25671 Latitude: 18° 5.4' N ( 18.08992) USGS Quad: ISLA MONA Longitude: 67° 56.3' W ( -67.93850) 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.