U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 5 Station ID: 8512668 PUBLICATION DATE: 06/13/2013 Name: MATTITUCK INLET, LONG ISLAND NY NOAA Chart: 12358 Latitude: 41° 0.9' N ( 41.01500) USGS Quad: MATTITUCK HILLS Longitude: 72° 33.7' W ( -72.56170) To reach the tidal bench marks from the post office in Mattituck, NY, head west on US 25 (Sound Avenue) for 1.6 km (1.0 mi), turn right onto Cox Neck Road for 1.3 km (0.8 mi), and follow for 1.6 km (1.0 mi), and turn left onto Naugles Road after 0.5 km (0.3 mi). The benchmarks are along Naugles Road and along the access road for the Mattituck Creek waterway access site. T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: 2668 A 2003 DESIGNATION: 851 2668 A MONUMENTATION: Tidal Station disk VM#: 17589 AGENCY: National Ocean Service (NOS) IDB PID#: SETTING CLASSIFICATION: Stainless steel rod OPUS PID#: BBCZ71 LATITUDE: 41° 0.8' N ( 41.01379) LONGITUDE: 72° 33.2' W ( -72.55297) The primary bench mark is located at the southwest end of the intersection of Breakwater and Naugles road, 24.3 m (79.7 ft) east of a retaining wall constructed from railroad ties, 8.4 m (27.6 ft) south of the centerline of Naugles road, 5.8 m (19.0 ft) southwest of a wood and wire fence, and 2.9 m (9.5 ft) southeast of utility pole 23. The mark is a stainless steel rod driven to an unspecified depth.The sleeve depth does not meet the requirements for a Class A rod mark.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 5 Station ID: 8512668 PUBLICATION DATE: 06/13/2013 Name: MATTITUCK INLET, LONG ISLAND NY NOAA Chart: 12358 Latitude: 41° 0.9' N ( 41.01500) USGS Quad: MATTITUCK HILLS Longitude: 72° 33.7' W ( -72.56170) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 2668 B 2013 DESIGNATION: 851 2668 B MONUMENTATION: Tidal Station disk VM#: 20675 AGENCY: National Ocean Service (NOS) IDB PID#: SETTING CLASSIFICATION: Concrete pad OPUS PID#: BBDB79 LATITUDE: 41° 0.8' N ( 41.01350) LONGITUDE: 72° 33.2' W ( -72.55261) The bench mark is a brass disk set in a concrete pad between two boat launching ramps 10.17 m (33.4 ft) SE of a small boulder with a dedication plaque on it, 9.24 m (30.3 ft) SE of the northeastern most dock light, 6.35 m (20.8 ft) NW of the fourth cyclone fence pipe from a gate leading into a boatyard, and 6.33 m (20.8 ft) NE of the NW of two 5x5 gray composite posts. BENCH MARK STAMPING: 2668 C 2013 DESIGNATION: 851 2668 C MONUMENTATION: Tidal Station disk VM#: 20676 AGENCY: National Ocean Service (NOS) IDB PID#: SETTING CLASSIFICATION: Boulder OPUS PID: LATITUDE: 41° 0.8' N ( 41.01300) LONGITUDE: 72° 33.2' W ( -72.55311) The bench mark is set into a large boulder measuring 3 m (9.8 ft) by 1.5 m (4.9 ft) by 1.2 m (3.9 ft), 29.05 m (95.3 ft) west of the second southernmost cyclone fence pipe at the nearby boat yard, 26.68 m (87.5 ft) south of a directional sign on two posts, 14.25 m (46.8 ft) east of a 4 inch (10 cm) property corner pile, and 9.80 m (32.2 ft) SW of the edge of a red brick paved area.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 5 Station ID: 8512668 PUBLICATION DATE: 06/13/2013 Name: MATTITUCK INLET, LONG ISLAND NY NOAA Chart: 12358 Latitude: 41° 0.9' N ( 41.01500) USGS Quad: MATTITUCK HILLS Longitude: 72° 33.7' W ( -72.56170) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 2668 D 2013 DESIGNATION: 851 2668 D MONUMENTATION: Tidal Station disk VM#: 20677 AGENCY: National Ocean Service (NOS) IDB PID#: SETTING CLASSIFICATION: Concrete pad OPUS PID: LATITUDE: 41° 0.8' N ( 41.01331) LONGITUDE: 72° 33.2' W ( -72.55389) The bench mark is set into a fenced pad containing two portable toilets enclosed by an 8 ft (2.4 m) composite fence, 12.14 m (39.8 ft)NW of the eastern corner of the edge of the intersection of a walkway and the main site access road, 8.53 m (28.0 ft) SW of a walking path light, 5.0 m (16.4 ft) west of the westernmost of three 5 inch (13 cm) by 5 inch (13 cm) composite posts, and 4.81 m (15.8 ft) SE of an information board. BENCH MARK STAMPING: 2668 E 2013 DESIGNATION: 851 2668 E MONUMENTATION: Tidal Station disk VM#: 20678 AGENCY: National Ocean Service (NOS) IDB PID#: SETTING CLASSIFICATION: Concrete pad OPUS PID: LATITUDE: 41° 0.7' N ( 41.01211) LONGITUDE: 72° 33.4' W ( -72.55639) The bench mark is set in a concrete pad containing a single portable toilet surrounded by an 8 ft (2.4 m) composite fence near the entrance to the site, 14.40 m (47.2 ft) NE of the centerline of the site access road, 14.21 m (46.6 ft) south of the westernmost of two benches, 7.63 m (25.0 ft) south of an information sign containing a cork board, and 3.34 m (11.0 ft) north of a bike rack.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 5 Station ID: 8512668 PUBLICATION DATE: 06/13/2013 Name: MATTITUCK INLET, LONG ISLAND NY NOAA Chart: 12358 Latitude: 41° 0.9' N ( 41.01500) USGS Quad: MATTITUCK HILLS Longitude: 72° 33.7' W ( -72.56170) T I D A L D A T U M S Tidal datums at MATTITUCK INLET, LONG ISLAND based on: LENGTH OF SERIES: 30 DAYS TIME PERIOD: March 24 2013 - April 22 2013 TIDAL EPOCH: 1983-2001 CONTROL TIDE STATION: 8467150 BRIDGEPORT, BRIDGEPORT HARBOR Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS: MEAN HIGHER HIGH WATER MHHW = 1.700 MEAN HIGH WATER MHW = 1.611 MEAN TIDE LEVEL MTL = 0.837 MEAN SEA LEVEL MSL = 0.828 MEAN LOW WATER MLW = 0.063 MEAN LOWER LOW WATER MLLW = 0.000 North American Vertical Datum (NAVD88) Bench Mark Elevation Information In METERS above: Stamping or Designation MLLW MHW 2668 A 2003 3.966 2.355 2668 B 2013 2.414 0.803 2668 C 2013 3.531 1.920 2668 D 2013 2.445 0.834 2668 E 2013 3.039 1.428
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 5 Station ID: 8512668 PUBLICATION DATE: 06/13/2013 Name: MATTITUCK INLET, LONG ISLAND NY NOAA Chart: 12358 Latitude: 41° 0.9' N ( 41.01500) USGS Quad: MATTITUCK HILLS Longitude: 72° 33.7' W ( -72.56170) 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.