U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 5 PUBLICATION DATE: 12/12/1989 Station ID: 8510560 SUPERCEDED DATE: 04/21/2003 Name: MONTAUK, FORT POND BAY NEW YORK NOAA Chart: 13209 Latitude: 41° 2.9' N USGS Quad: MONTAUK POINT Longitude: 71° 57.6' W To reach the tidal bench marks from the traffic circle in Montauk, proceed north on Edgemont Road (State Highway 49) for 1.2 miles (1.9 km) to the Rough Rider Condominium complex. The bench marks are on the condominium grounds and to the north, in the vicinity of Duryea's Seafood. The tide gage and staff are in the NE corner of the Rough Rider Condominium pier. T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: 0560 J 1977 MONUMENTATION: Survey Disk VM#: 261 AGENCY: PID#: AH6725 SETTING CLASSIFICATION: Stainless Steel Rod The bench mark is at the foot of the Rough Rider Condominium pier, 14.3 feet (4.4 m) south of the shoreward end of the pier, 11.7 feet (3.6 m) west of the centerline of the pier, 1 foot (0.3 m) north of the north edge of a sidewalk, and 1 foot (0.3 m) west of the west edge of the access road to the pier. The bench mark is at ground level, crimped to a stainless steel rod driven 42 feet (13 m) to refusal, and encased in a 4-inch PVC pipe and concrete kickblock. BENCH MARK STAMPING: NO 8 1947 MONUMENTATION: Survey Disk VM#: 260 AGENCY: PID#: LW0832 SETTING CLASSIFICATION: Concrete Manhole Rim The bench mark is set flush in the concrete pavement around a manhole in the Rough Rider Condominium complex, 196.0 feet (59.7 m) SW of the west edge of the north-south running boardwalk, 113 feet (34 m) NE of the centerline of the road leading to the pier, and 22.6 feet (6.9 m) NW of the north edge of the east-west running boardwalk.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 5 PUBLICATION DATE: 12/12/1989 Station ID: 8510560 SUPERCEDED DATE: 04/21/2003 Name: MONTAUK, FORT POND BAY NEW YORK NOAA Chart: 13209 Latitude: 41° 2.9' N USGS Quad: MONTAUK POINT Longitude: 71° 57.6' W T I D A L B E N C H M A R K S BENCH MARK STAMPING: 0560 K 1988 MONUMENTATION: Survey Disk VM#: 262 AGENCY: PID#: AH6726 SETTING CLASSIFICATION: Stainless Steel Rod The bench mark is at the SW corner of a parking lot in the vicinity of the pier, 175 feet (53 m) SSE of the SE corner of a small building at the end of the pier, 115.3 feet (35.1 m) north of a wooden walkway behind the southernmost condominium building, and 111.4 feet (34.0 m) SW of the centerline of the access road leading to the pier. The bench mark is crimped to a stainless steel rod driven 52 feet (16 m) to refusal, and encased in PVC pipe and concrete kickblock. BENCH MARK STAMPING: 0560 L 1988 MONUMENTATION: Survey Disk VM#: 263 AGENCY: PID: SETTING CLASSIFICATION: Stainless Steel Rod The bench mark is at the southern end of the Rough Riders condominium complex property, 105 feet (32 m) NE of a fire hydrant, 83.3 feet (25.4 m) SW of the SW corner of model condominium No. 109, and 1.6 feet (0.5 m) east of a north-south walkway parallel with condominium No. 111. The bench mark is level with the ground, crimped to a stainless steel rod riven 48 feet (15 m) to refusal, and encased in PVC pipe and concrete kickblock.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 5 PUBLICATION DATE: 12/12/1989 Station ID: 8510560 SUPERCEDED DATE: 04/21/2003 Name: MONTAUK, FORT POND BAY NEW YORK NOAA Chart: 13209 Latitude: 41° 2.9' N USGS Quad: MONTAUK POINT Longitude: 71° 57.6' W T I D A L B E N C H M A R K S BENCH MARK STAMPING: 0560 M 1988 MONUMENTATION: Survey Disk VM#: 264 AGENCY: PID: SETTING CLASSIFICATION: Concrete Loading Dock The bench mark is set in the southern corner of the concrete loading dock of Duryea's Seafood, 15.0 feet (4.6 m) west of the centerline of Fleming Road, 14.2 feet (4.3 m) NE of the south end of a building, 6.2 feet (1.9 m) east of a building on the west side of Fleming Road, and 1.7 feet (0.5 m) above the ground.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 5 PUBLICATION DATE: 12/12/1989 Station ID: 8510560 SUPERCEDED DATE: 04/21/2003 Name: MONTAUK, FORT POND BAY NEW YORK NOAA Chart: 13209 Latitude: 41° 2.9' N USGS Quad: MONTAUK POINT Longitude: 71° 57.6' W T I D A L D A T U M S Tidal datums at MONTAUK, FORT POND BAY based on: LENGTH OF SERIES: 17 YEARS TIME PERIOD: 1960-1978 TIDAL EPOCH: 1960-1978 CONTROL TIDE STATION: Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in FEET: HIGHEST OBSERVED WATER LEVEL (08/31/1954) = 8.70 MEAN HIGHER HIGH WATER MHHW = 2.59 MEAN HIGH WATER MHW = 2.31 MEAN TIDE LEVEL MTL = 1.24 MEAN LOW WATER MLW = 0.18 MEAN LOWER LOW WATER MLLW = 0.00 LOWEST OBSERVED WATER LEVEL (02/02/1976) = -3.54 North American Vertical Datum (NAVD88) Bench Mark Elevation Information In FEET above: Stamping or Designation MLLW MHW 0560 J 1977 8.25 5.94 NO 8 1947 6.95 4.64 0560 K 1988 5.99 3.68 0560 L 1988 6.11 3.80 0560 M 1988 7.34 5.03
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 5 PUBLICATION DATE: 12/12/1989 Station ID: 8510560 SUPERCEDED DATE: 04/21/2003 Name: MONTAUK, FORT POND BAY NEW YORK NOAA Chart: 13209 Latitude: 41° 2.9' N USGS Quad: MONTAUK POINT Longitude: 71° 57.6' W 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 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.