U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 5 Station ID: 8516891 PUBLICATION DATE: 04/15/2014 Name: NORTON POINT, HOOK CREEK NY NOAA Chart: 12350 Latitude: 40° 38.1' N ( 40.63500) USGS Quad: LYNBROOK Longitude: 73° 44.8' W ( -73.74670) To reach the bench marks from John F. Kennedy (JFK) International Airport, proceed NW for 2.3 km (1.4 mi) on the JFK Expressway, take the exit to Interstate 678, keep right at the fork and follow the signs for Rockaway Boulevard East and Nassau Boulevard, proceed 1.3 km (0.8 mi) SE on Nassau Boulevard until it becomes Rockaway Boulevard, continue SE for 3.4 km (2.1 mi) on Rockaway Boulevard to a stoplight, turn right and proceed 0.1 km (0.6 mi) south on Brookville Boulevard to the intersection with Broad Street, continue straight onto Broad Street for 0.1 km (0.06 mi) to the intersection with Bayview Avenue, turn left and proceed 0.15 km (0.09 mi) on Bayview Avenue to the Bay Waterfront Bar & Grill at 155-57 Bayview Avenue. The bench marks are located along Hook Creek between the tide gauges and the Meyer Avenue Bridge over Hook Creek. The tide gauges are located on the restaurant's dock. T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: 6891 A 2013 DESIGNATION: 851 6891 A MONUMENTATION: Tidal Station disk VM#: 20956 AGENCY: National Ocean Service IDB PID#: SETTING CLASSIFICATION: Concrete bridge abutment OPUS PID: LATITUDE: 40° 38.1' N ( 40.63458) LONGITUDE: 73° 44.4' W ( -73.74056) The primary bench mark is a brass disk set in the NE concrete abutment for the E Avenue bridge over Hook Creek, 23.20 m (76.1 ft) ENE of where the W end of the bridge meets some sheet pile, 5.02 m (16.5 ft) NNW of the centerline of E Avenue, 1.25 m (4.1 ft) WSW of the E most edge of the abutment, 0.21 m (0.6 ft) SSE of the N edge of the abutment, and 0.18 m (0.6 ft) above the road level.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 5 Station ID: 8516891 PUBLICATION DATE: 04/15/2014 Name: NORTON POINT, HOOK CREEK NY NOAA Chart: 12350 Latitude: 40° 38.1' N ( 40.63500) USGS Quad: LYNBROOK Longitude: 73° 44.8' W ( -73.74670) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 6891 B 2013 DESIGNATION: 851 6891 B MONUMENTATION: Tidal Station disk VM#: 20957 AGENCY: National Ocean Service IDB PID#: SETTING CLASSIFICATION: Concrete bridge abutment OPUS PID#: BBDK07 LATITUDE: 40° 38.2' N ( 40.63625) LONGITUDE: 73° 44.5' W ( -73.74186) The bench mark is a brass disk set in the top concrete step on the E side of the Meyer Avenue footbridge over Hook Creek, 29.73 m (97.5 ft) WNW of the center of the intersection of Meyer Avenue and 1st Street, 5.22 m (17.1 ft) ESE of the E most bridge piling on the south side of the bridge, 1.40 m (4.5 ft) S of the center line of the bridge, 0.18 m (0.6 ft) ESE of the W edge of the concrete steps, 0.17 m (0.6 ft) NNE of the S edge of the concrete steps, and 0.46 m (1.5 ft) above the road level. BENCH MARK STAMPING: 6891 C 2013 DESIGNATION: 851 6891 C MONUMENTATION: Tidal Station disk VM#: 20958 AGENCY: National Ocean Service IDB PID#: SETTING CLASSIFICATION: Concrete backfill steel sheet pile seawall OPUS PID: LATITUDE: 40° 38.2' N ( 40.63739) LONGITUDE: 73° 44.5' W ( -73.74097) The bench mark is a brass disk set in the top of the concrete backfill of the steel sheet pile seawall along Hook Creek near the intersection of Rockaway Boulevard and Division Street, 22.60 m (74.1 ft) NNW of the S end of seawall, 11.58 m (38.0 ft) SSE of the center of a drain pipe set in the top of seawall, 3.89 m (12.8 ft) WNW of the SW curb of Rockaway Boulevard, and 0.86 m (2.8 ft) below the sidewalk.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 5 Station ID: 8516891 PUBLICATION DATE: 04/15/2014 Name: NORTON POINT, HOOK CREEK NY NOAA Chart: 12350 Latitude: 40° 38.1' N ( 40.63500) USGS Quad: LYNBROOK Longitude: 73° 44.8' W ( -73.74670) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 6891 D 2013 DESIGNATION: 851 6891 D MONUMENTATION: Tidal Station disk VM#: 20959 AGENCY: National Ocean Service IDB PID#: SETTING CLASSIFICATION: Large concrete block footing OPUS PID: LATITUDE: 40° 38.3' N ( 40.63872) LONGITUDE: 73° 44.7' W ( -73.74447) The bench mark is a brass disk set in the top of the concrete foundation of a recycling building built out conex shipping containers and located along Bayview Avenue, 14.60 m (47.9 ft) NE of the center of the intersection of Broad Street and Bayview Avenue, 12.10 m (39.7 ft) N of power pole #P4, 6.80 m (22.3 ft) WNW of power pole support #4S, 4.41 m (14.4 ft) ESE of the SW corner of recycling building, and 0.62 m (2.0 ft) above the street level. BENCH MARK STAMPING: 6891 E 2013 DESIGNATION: 851 6891 E MONUMENTATION: Tidal Station disk VM#: 20960 AGENCY: National Ocean Service IDB PID#: SETTING CLASSIFICATION: Large concrete block wall OPUS PID: LATITUDE: 40° 38.3' N ( 40.63778) LONGITUDE: 73° 44.7' W ( -73.74489) The bench mark is a brass disk set in the top of a concrete wall with a chain-link fence that is along the E side of Bayview Avenue, 26.20 m (86.0 ft) SSW of a gate going through the concrete wall, 11.59 m (38.0 ft) E of the front door of the house at 155-46 Bayview Avenue, 3.45 m (11.3 ft) E of the Bayview Avenue centerline, 2.48 m (8.1 ft) N of the S end of the wall, and 0.89 m (2.9 ft) above the street level .
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 5 Station ID: 8516891 PUBLICATION DATE: 04/15/2014 Name: NORTON POINT, HOOK CREEK NY NOAA Chart: 12350 Latitude: 40° 38.1' N ( 40.63500) USGS Quad: LYNBROOK Longitude: 73° 44.8' W ( -73.74670) T I D A L D A T U M S Tidal datums at NORTON POINT, HOOK CREEK based on: LENGTH OF SERIES: 4 MONTHS TIME PERIOD: September 2013 - December 2013 TIDAL EPOCH: 1983-2001 CONTROL TIDE STATION: 8531680 SANDY HOOK Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS: MEAN HIGHER HIGH WATER MHHW = 1.887 MEAN HIGH WATER MHW = 1.783 MEAN SEA LEVEL MSL = 0.932 MEAN TIDE LEVEL MTL = 0.924 MEAN LOW WATER MLW = 0.064 MEAN LOWER LOW WATER MLLW = 0.000 North American Vertical Datum (NAVD88) Bench Mark Elevation Information In METERS above: Stamping or Designation MLLW MHW 6891 A 2013 3.658 1.875 6891 B 2013 2.854 1.071 6891 C 2013 2.715 0.932 6891 D 2013 3.088 1.305 6891 E 2013 3.317 1.534
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 5 Station ID: 8516891 PUBLICATION DATE: 04/15/2014 Name: NORTON POINT, HOOK CREEK NY NOAA Chart: 12350 Latitude: 40° 38.1' N ( 40.63500) USGS Quad: LYNBROOK Longitude: 73° 44.8' W ( -73.74670) 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.