U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 8 Station ID: 8515186 PUBLICATION DATE: 12/16/2004 Name: FIRE ISLAND COAST GUARD STATION NY NOAA Chart: 12353 Latitude: 40° 37.6' N ( 40.62670) USGS Quad: BAY SHORE WEST Longitude: 73° 15.6' W ( -73.26000) To reach the tidal bench marks from the south point of the traffic circle at the south end of the Robert Moses Causeway on Fire Island, proceed east on the park road for 0.8 km (0.5 mi) to a turnaround and then head back west for 0.3 km (0.2 mi) to the entrance to Fire Island Coast Guard Station, then follow the entrance road west to the station boat basin on Fire island Inlet. The bench marks are located near the station and east along the park road. The tide gage and staff were on the outside of the west bulkhead of the boat basin. T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: 5186 A 1989 DESIGNATION: 851 5186 A MONUMENTATION: Tidal Station disk VM#: 2307 AGENCY: National Ocean Service (NOS) IDB PID#: SETTING CLASSIFICATION: Concrete foundation of a tower OPUS PID: LATITUDE: 40° 37.6' N ( 40.62670) LONGITUDE: 73° 15.6' W ( -73.26000) The primary bench mark is a disk set flush in the NW corner of the square concrete base of the antenna tower, 31 m (102 ft) south of the SW corner of the boat basin dock, 29.02 m (95.2 ft) north of the NW corner of the maintenance building, 4.36 m (14.3 ft) west of a chain link fence, and 0.15 m (0.5 ft) below the top surface of the round steel base of the antenna.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 8 Station ID: 8515186 PUBLICATION DATE: 12/16/2004 Name: FIRE ISLAND COAST GUARD STATION NY NOAA Chart: 12353 Latitude: 40° 37.6' N ( 40.62670) USGS Quad: BAY SHORE WEST Longitude: 73° 15.6' W ( -73.26000) T I D A L B E N C H M A R K S BENCH MARK STAMPING: NO 7 1933 DESIGNATION: TIDAL 7 STA II 68 MONUMENTATION: Tidal Station disk VM#: 2303 AGENCY: US Coast and Geodetic Survey (USC&GS) IDB PID#: KU0723 SETTING CLASSIFICATION: Granite foundation block OPUS PID: LATITUDE: 40° 37.9' N ( 40.63170) LONGITUDE: 73° 13.1' W ( -73.21830) The bench mark is a disk set in a granite foundation block on the north side of the Fire Island Lighthouse tower, in the circular rim of the lighthouse, 3.5 km (2.2 mi) east of Fire Island Coast Guard Station, and 0.46 m (1.5 ft) above the brick terrace built around the lighthouse.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 8 Station ID: 8515186 PUBLICATION DATE: 12/16/2004 Name: FIRE ISLAND COAST GUARD STATION NY NOAA Chart: 12353 Latitude: 40° 37.6' N ( 40.62670) USGS Quad: BAY SHORE WEST Longitude: 73° 15.6' W ( -73.26000) T I D A L B E N C H M A R K S BENCH MARK STAMPING: R 375 1956 DESIGNATION: R 375 MONUMENTATION: Tidal Station disk VM#: 2304 AGENCY: US Coast and Geodetic Survey (USC&GS) IDB PID#: KU0724 SETTING CLASSIFICATION: Concrete base OPUS PID: LATITUDE: 40° 37.9' N ( 40.63170) LONGITUDE: 73° 12.9' W ( -73.21500) The bench mark is a disk set in the top of a 1 m x 1 m (3 ft x 3 ft) concrete base of a former tower, in the most southern one of three bases, at the Fire Island Coast Guard Radio Station, 2.1 km (1.3 mi) west along Dune road from the water tank at Saltaire, 21.88 m (71.8 ft) SE of the SW corner of the radio station building, and 18.11 m (59.4 ft) south of the south side of the building.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 8 Station ID: 8515186 PUBLICATION DATE: 12/16/2004 Name: FIRE ISLAND COAST GUARD STATION NY NOAA Chart: 12353 Latitude: 40° 37.6' N ( 40.62670) USGS Quad: BAY SHORE WEST Longitude: 73° 15.6' W ( -73.26000) T I D A L B E N C H M A R K S BENCH MARK STAMPING: S 375 1956 DESIGNATION: S 375 MONUMENTATION: Bench Mark disk VM#: 2305 AGENCY: US Coast and Geodetic Survey (USC&GS) IDB PID#: KU0725 SETTING CLASSIFICATION: Concrete base OPUS PID: LATITUDE: 40° 37.9' N ( 40.63170) LONGITUDE: 73° 12.9' W ( -73.21500) The bench mark is a disk set in the top of a 1.22 m x 1.71 m (4.0 ft x 5.6 ft) concrete base of a former radio tower at the Fire Island Coast Guard Radio Station, 52 m (172 ft) east of the NE corner of the radio station building, and 52 m (170 ft) east of the radio tower. BENCH MARK STAMPING: V 375 RESET 1968 DESIGNATION: 851 5186 V 375 RESET MONUMENTATION: Tidal Station disk VM#: 2306 AGENCY: US Coast and Geodetic Survey (USC&GS) IDB PID#: SETTING CLASSIFICATION: Concrete helicopter pad OPUS PID#: BBDC06 LATITUDE: 40° 37.5' N ( 40.62542) LONGITUDE: 73° 15.5' W ( -73.25889) The bench mark is a disk set flush near the center of the concrete helicopter pad, 39.99 m (131.2 ft) SE of the SE corner of the wood-sided boat house, 19.57 m (64.2 ft) north of the south corner of the pad, and 19.08 m (62.6 ft) west of the east corner of the pad.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 8 Station ID: 8515186 PUBLICATION DATE: 12/16/2004 Name: FIRE ISLAND COAST GUARD STATION NY NOAA Chart: 12353 Latitude: 40° 37.6' N ( 40.62670) USGS Quad: BAY SHORE WEST Longitude: 73° 15.6' W ( -73.26000) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 5186 B 1989 DESIGNATION: 851 5186 B MONUMENTATION: Tidal Station disk VM#: 2308 AGENCY: National Ocean Service (NOS) IDB PID#: SETTING CLASSIFICATION: Concrete bridge abutment OPUS PID#: BBDG76 LATITUDE: 40° 37.5' N ( 40.62494) LONGITUDE: 73° 15.7' W ( -73.26181) The bench mark is a disk set flush in the SE concrete bridge abutment of the Robert Moses Causeway over Fire Island Inlet, 4.88 m (16.0 ft) SE of the centerline of the highway, 4.82 m (15.8 ft) north of the SE inside corner of the wingwall, and 0.26 m (0.85 ft) SW of the NE edge of the abutment. BENCH MARK STAMPING: 5 579 DESIGNATION: 851 5186 5 579 MONUMENTATION: Survey disk VM#: 2309 AGENCY: Suffolk County IDB PID#: SETTING CLASSIFICATION: Concrete monument OPUS PID: LATITUDE: 40° 37.6' N ( 40.62639) LONGITUDE: 73° 15.9' W ( -73.26486) The bench mark is a disk set in a concrete monument near the entrance lane to Field 4, 0.4 km (0.25 mi) east of bench mark 5 580, 12.74 m (41.8 ft) SW of a painted cross in the pavement with a chiseled X in the center, 7.25 m (23.8 ft) SE of a railroad spike with chiseled X set in the seam of the concrete pavement along the edge of the road, and 4.36 m (14.3 ft) south of the edge of the pavement.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 6 of 8 Station ID: 8515186 PUBLICATION DATE: 12/16/2004 Name: FIRE ISLAND COAST GUARD STATION NY NOAA Chart: 12353 Latitude: 40° 37.6' N ( 40.62670) USGS Quad: BAY SHORE WEST Longitude: 73° 15.6' W ( -73.26000) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 5 580 DESIGNATION: 851 5186 5 580 MONUMENTATION: Survey disk VM#: 2310 AGENCY: Suffolk County IDB PID#: SETTING CLASSIFICATION: Concrete monument OPUS PID: LATITUDE: 40° 37.5' N ( 40.62528) LONGITUDE: 73° 15.2' W ( -73.25300) The bench mark is a disk set in a concrete monument near the first turnaround east of the traffic circle at the south end of the Robert Moses Causeway, 16.37 m (53.7 ft) SE of a railroad spike with chiseled cross set near the edge of the road, 15.82 m (51.9 ft) SW of a second spike in the road near a sign for the Coast Guard Station - Fields 2&3, 7.99 m (26.2 ft) SSE of a third spike along the centerline of the road, and 3.96 m (13 ft) south of the edge of the pavement.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 7 of 8 Station ID: 8515186 PUBLICATION DATE: 12/16/2004 Name: FIRE ISLAND COAST GUARD STATION NY NOAA Chart: 12353 Latitude: 40° 37.6' N ( 40.62670) USGS Quad: BAY SHORE WEST Longitude: 73° 15.6' W ( -73.26000) T I D A L D A T U M S Tidal datums at FIRE ISLAND COAST GUARD STATION based on: LENGTH OF SERIES: 1 YEAR TIME PERIOD: December 1989 - November 1990 TIDAL EPOCH: 1983-2001 CONTROL TIDE STATION: 8518750 THE BATTERY, NEW YORK HARBOR Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS: HIGHEST OBSERVED WATER LEVEL (10/19/1989) = 1.133 MEAN HIGHER HIGH WATER MHHW = 0.705 MEAN HIGH WATER MHW = 0.649 North American Vertical Datum NAVD88 = 0.404 MEAN SEA LEVEL MSL = 0.344 MEAN TIDE LEVEL MTL = 0.344 MEAN LOW WATER MLW = 0.040 MEAN LOWER LOW WATER MLLW = 0.000 LOWEST OBSERVED WATER LEVEL (11/12/1990) = -0.613 North American Vertical Datum (NAVD88) Bench Mark Elevation Information In METERS above: Stamping or Designation MLLW MHW 5186 A 1989 2.976 2.327 NO 7 1933 5.100 4.451 R 375 1956 3.112 2.463 S 375 1956 2.660 2.011 V 375 RESET 1968 3.163 2.514 5186 B 1989 7.958 7.309 5 579 4.793 4.144 5 580 4.802 4.153
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 8 of 8 Station ID: 8515186 PUBLICATION DATE: 12/16/2004 Name: FIRE ISLAND COAST GUARD STATION NY NOAA Chart: 12353 Latitude: 40° 37.6' N ( 40.62670) USGS Quad: BAY SHORE WEST Longitude: 73° 15.6' W ( -73.26000) 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.