U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 8 Station ID: 8454000 PUBLICATION DATE: 04/21/2003 Name: PROVIDENCE, PROVIDENCE RIVER RI NOAA Chart: 13224 Latitude: 41° 48.4' N ( 41.80670) USGS Quad: PROVIDENCE Longitude: 71° 24.1' W ( -71.40170) To reach the tidal bench marks from northbound I-95 take Exit 18 (Thurbers Avenue) to Allens Avenue (Alt 1). Proceed north on Allens Avenue for 0.6 km (0.4 mi) to 242 Allens Avenue, Promet Corp. Pier, formerly State Pier. From southbound I-95 take Exit 19 (Allens Avenue). Proceed south for 0.3 km (0.2 mi) to Promet Marine Services. The tide station is located on the pier in the SE corner of the Promet property. All bench marks are located within 1.6 km (1 mi) of tide station. T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: NO 6 RESET 1930 DESIGNATION: 845 4000 TIDAL 6 RESET MONUMENTATION: Tidal Station disk VM#: 229 AGENCY: US Coast and Geodetic Survey (USC&GS) IDB PID#: LW0150 SETTING CLASSIFICATION: Concrete bulkhead deck OPUS PID: LATITUDE: 41° 48.4' N ( 41.80714) LONGITUDE: 71° 24.0' W ( -71.40081) The primary bench mark is a disk set in the concrete deck at the onshore end of the pier, located in the vicinity of the Promet Marine Services Building, 9.00 m (29.5 ft) west of the SW corner of the building, 4.10 m (13.5 ft) east of a fire main, and 1.10 m (3.6 ft) south of a 10-inch steam main.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 8 Station ID: 8454000 PUBLICATION DATE: 04/21/2003 Name: PROVIDENCE, PROVIDENCE RIVER RI NOAA Chart: 13224 Latitude: 41° 48.4' N ( 41.80670) USGS Quad: PROVIDENCE Longitude: 71° 24.1' W ( -71.40170) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 9 1938 DESIGNATION: 845 4000 TIDAL 9 MONUMENTATION: Tidal Station disk VM#: 230 AGENCY: US Coast and Geodetic Survey (USC&GS) IDB PID#: LW0154 SETTING CLASSIFICATION: Concrete bulkhead deck OPUS PID#: LW0154 LATITUDE: 41° 48.5' N ( 41.80761) LONGITUDE: 71° 23.9' W ( -71.39892) The bench mark is set in the concrete pier deck, located in the vicinity of the extreme SE end of the Promet Marine Services Pier, 23.60 m (77.4 ft) SW of the rectangular flood light tower, 0.80 m (2.6 ft) west of the easterly mooring bit, and 0.20 m (0.7 ft) north of the south cap log. BENCH MARK STAMPING: 10 1938 DESIGNATION: 854 4000 TIDAL 10 MONUMENTATION: Tidal Station disk VM#: 231 AGENCY: US Coast and Geodetic Survey (USC&GS) IDB PID#: LW0152 SETTING CLASSIFICATION: Concrete bulkhead extension OPUS PID: LATITUDE: 41° 48.4' N ( 41.80742) LONGITUDE: 71° 24.1' W ( -71.40111) The bench mark is a disk set in the concrete extension of the pier, located on the Promet Marine Service property, 32.0 m (105 ft) NW of the NW corner of the Promet office, 23.60 m (77.4 ft) west of the inshore end of pier, and 9.00 m (29.5 ft) north of the extended centerline of the pier.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 8 Station ID: 8454000 PUBLICATION DATE: 04/21/2003 Name: PROVIDENCE, PROVIDENCE RIVER RI NOAA Chart: 13224 Latitude: 41° 48.4' N ( 41.80670) USGS Quad: PROVIDENCE Longitude: 71° 24.1' W ( -71.40170) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 4000 A 1979 DESIGNATION: 845 4000 A TIDAL MONUMENTATION: Tidal Station disk VM#: 232 AGENCY: National Ocean Survey (NOS) IDB PID#: LW5204 SETTING CLASSIFICATION: Concrete scale platform OPUS PID: LATITUDE: 41° 48.4' N ( 41.80703) LONGITUDE: 71° 24.2' W ( -71.40294) The bench mark is a disk set in the SW corner of the truck scale platform, located in the vicinity of the south entrance to Promet Marine Services, 28.00 m (91.9 ft) north of the north gate post of the south entrance, 6.60 m (21.7 ft) east of the eastern curb of Allens Avenue, and 1.00 m (3.2 ft) SE of the SE corner of the truck scale building. BENCH MARK STAMPING: 4000 B 1979 DESIGNATION: 845 4000 B MONUMENTATION: Tidal Station disk VM#: 233 AGENCY: National Ocean Survey (NOS) IDB PID#: SETTING CLASSIFICATION: Concrete step OPUS PID: LATITUDE: 41° 48.5' N ( 41.80808) LONGITUDE: 71° 24.2' W ( -71.40378) The bench mark is a disk set in the bottom step of the Narragansett Improvement Company located at 223 Allens Avenue, 10.10 m (33.1 ft) south of the centerline of Public Street, 4.00 m (13.1 ft) north of the SE corner of the building, 2.70 m (8.9 ft) west of the west curb of Allens Avenue, and 0.15 m (0.5 ft) above the sidewalk.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 8 Station ID: 8454000 PUBLICATION DATE: 04/21/2003 Name: PROVIDENCE, PROVIDENCE RIVER RI NOAA Chart: 13224 Latitude: 41° 48.4' N ( 41.80670) USGS Quad: PROVIDENCE Longitude: 71° 24.1' W ( -71.40170) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 4000 G 1976 DESIGNATION: 845 4000 G TIDAL MONUMENTATION: Tidal Station disk VM#: 234 AGENCY: National Ocean Survey (NOS) IDB PID#: AH9453 SETTING CLASSIFICATION: Concrete loading ramp OPUS PID: LATITUDE: 41° 48.5' N ( 41.80753) LONGITUDE: 71° 25.0' W ( -71.41661) The bench mark is a disk set in the top of the concrete loading ramp, located on the Promet Marine Service property, 16.00 m (52.5 ft) south of the northern wharf face, 10.2 m (33.5 ft) west of the NE corner of the warehouse, 3.00 m (9.8 ft) NE of the loading ramp door, and 1.00 m (3.3 ft) above ground. BENCH MARK STAMPING: 4000 K 1977 DESIGNATION: 845 4000 K TIDAL MONUMENTATION: Tidal Station disk VM#: 235 AGENCY: National Ocean Survey (NOS) IDB PID#: LW5205 SETTING CLASSIFICATION: Concrete pier deck OPUS PID: LATITUDE: 41° 48.4' N ( 41.80703) LONGITUDE: 71° 24.0' W ( -71.40061) The bench mark is a disk set in the deck of the concrete pier, located in the SE corner of the Promet Marine Service Pier, 20.00 m (65.6 ft) south of the SE corner of the Promet building, 1.50 m (4.9 ft) west of the NOAA 6-inch PVC protective well, and 0.85 m (2.79 ft) north of the south face of pier.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 8 Station ID: 8454000 PUBLICATION DATE: 04/21/2003 Name: PROVIDENCE, PROVIDENCE RIVER RI NOAA Chart: 13224 Latitude: 41° 48.4' N ( 41.80670) USGS Quad: PROVIDENCE Longitude: 71° 24.1' W ( -71.40170) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 4000 L 1986 DESIGNATION: 845 4000 L MONUMENTATION: Tidal Station disk VM#: 1519 AGENCY: National Ocean Service (NOS) IDB PID#: SETTING CLASSIFICATION: Stainless steel rod OPUS PID: LATITUDE: 41° 48.5' N ( 41.80759) LONGITUDE: 71° 24.2' W ( -71.40321) The bench mark is a disk, located along Allens Avenue at the entrance to the Promet Marine Services property, 48.30 m (158.5 ft) north of the NW corner of the truck scale, 6.10 m (20.0 ft) east of Power Pole No. 537035, 0.90 m (3.0 ft) north of the north gate post, and 0.40 m (1.3 ft) NE of a witness post. The bench mark is crimped to a stainless steel rod driven 15.8 m (52 ft) to refusal, and encased in a 6 inch PVC pipe with concrete kickblock. BENCH MARK STAMPING: 4000 M 1990 DESIGNATION: 845 4000 M MONUMENTATION: Tidal Station disk VM#: 1520 AGENCY: National Ocean Service (NOS) IDB PID#: SETTING CLASSIFICATION: Stainless steel rod OPUS PID: LATITUDE: 41° 48.5' N ( 41.80792) LONGITUDE: 71° 24.2' W ( -71.40286) At Providence, near the junction of Allens Avenue and Bay Street, the bench mark is a disk located on the north side of Promet Marine Services, 12.20 m (40.03 ft) east of the SW corner of the Michelin-Dunlap Tire Company, 4.7 m (15.4 ft) south of the east side of the Michelin-Dunlap garage door, 0.95 m (3.12 ft) east of the south end of the ramp leading to the Michelin-Dunlap garage door, and 0.50 m (1.64 ft) south of a witness post. The bench mark is crimped to a stainless steel rod driven 20.7 m (67.9 ft) to refusal, and encased in a standard nos concrete kickblock.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 6 of 8 Station ID: 8454000 PUBLICATION DATE: 04/21/2003 Name: PROVIDENCE, PROVIDENCE RIVER RI NOAA Chart: 13224 Latitude: 41° 48.4' N ( 41.80670) USGS Quad: PROVIDENCE Longitude: 71° 24.1' W ( -71.40170) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 4000 N 1990 DESIGNATION: 845 4000 N MONUMENTATION: Tidal Station disk VM#: 1521 AGENCY: National Ocean Service (NOS) IDB PID#: SETTING CLASSIFICATION: Stainless steel rod OPUS PID: LATITUDE: 41° 48.4' N ( 41.80661) LONGITUDE: 71° 24.2' W ( -71.40275) The bench mark is a disk located in the SW corner of the Promet Marine Services property, 19.20 m (63.0 ft) south of the centerline of the road leading into the Promet property, 16.90 m (55.4 ft) east of the centerline of Allens Avenue, 4.90 m (16.1 ft) east of the SW corner of the fence, 2.60 m (8.5 ft) south of a utility pole, and 0.06 m (0.2 ft) north of a chainlink fence. The bench mark is crimped to a stainless steel rod driven 18.3 m (60 ft) to refusal, and encased in a standard NOS concrete kickblock.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 7 of 8 Station ID: 8454000 PUBLICATION DATE: 04/21/2003 Name: PROVIDENCE, PROVIDENCE RIVER RI NOAA Chart: 13224 Latitude: 41° 48.4' N ( 41.80670) USGS Quad: PROVIDENCE Longitude: 71° 24.1' W ( -71.40170) T I D A L D A T U M S Tidal datums at PROVIDENCE, PROVIDENCE RIVER 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 (09/21/1938) = 5.337 MEAN HIGHER HIGH WATER MHHW = 1.476 MEAN HIGH WATER MHW = 1.401 North American Vertical Datum NAVD88 = 0.754 MEAN TIDE LEVEL MTL = 0.728 MEAN SEA LEVEL MSL = 0.686 MEAN LOW WATER MLW = 0.055 MEAN LOWER LOW WATER MLLW = 0.000 LOWEST OBSERVED WATER LEVEL (01/05/1959) = -1.094 North American Vertical Datum (NAVD88) Bench Mark Elevation Information In METERS above: Stamping or Designation MLLW MHW NO 6 RESET 1930 3.429 2.029 9 1938 3.410 2.010 10 1938 3.213 1.812 4000 A 1979 4.655 3.255 4000 B 1979 4.166 2.765 4000 G 1976 4.394 2.994 4000 K 1977 3.429 2.028 4000 L 1986 4.212 2.811 4000 M 1990 3.754 2.354 4000 N 1990 4.556 3.156
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 8 of 8 Station ID: 8454000 PUBLICATION DATE: 04/21/2003 Name: PROVIDENCE, PROVIDENCE RIVER RI NOAA Chart: 13224 Latitude: 41° 48.4' N ( 41.80670) USGS Quad: PROVIDENCE Longitude: 71° 24.1' W ( -71.40170) 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 the fixed datums of North American Vertical Datum of 1988 (NAVD88). NAVD88 is a fixed datum derived from a simultaneous, least squares, minimum constraint adjustment of Canadian/Mexican/United States leveling observations. Local mean sea level observed at Father Point/Rimouski, Canada was held fixed as the single initial constraint. NAVD88 replaces NGVD29 as the national standard geodetic reference for heights. Bench mark elevations relative to NAVD88 are available from NGS through the World Wide Web at National Geodetic Survey. NGVD29 is a fixed datum adopted as a national standard geodetic reference for heights but is now considered superseded. NGVD29 is sometimes referred to as Sea Level Datum of 1929 or as Mean Sea Level on some early issues of Geological Survey Topographic Quads. NGVD29 was originally derived from a general adjustment of the first-order leveling networks of the U.S. and Canada after holding mean sea level observed at 26 long term tide stations as fixed. Numerous local and wide-spread adjustments have been made since establishment in 1929. Bench mark elevations relative to NGVD29 are available from the National Geodetic Survey (NGS) data base via the World Wide Web at National Geodetic Survey. NAVD88 and NGVD29 are fixed geodetic datums whose elevation relationships 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 NAVD88 elevation is shown on the Elevations of Tidal Datums Table Referred to MLLW only when two or more of the bench marks listed have NAVD88 elevations. The NAVD88 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, NAVD88 bench mark elevations computed indirectly from the tidal datums elevation table may differ slightly from NAVD88 elevations listed for each bench mark in the NGS database.