U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 5 Station ID: 8531262 PUBLICATION DATE: 07/15/2003 Name: KEASBEY, RARITAN RIVER NJ NOAA Chart: 12131 Latitude: 40° 30.5' N ( 40.50830) USGS Quad: PERTH AMBOY Longitude: 74° 18.7' W ( -74.31170) To reach the tidal bench marks from the Garden State Parkway, exit at South Amboy toll and proceed north on U.S. 9 across Raritan River to the first stoplight at Smith Street, then proceed west on Smith Street for 1.6 km (1 mi) to Crows Mill Road, then proceed south on Crows Mill Road to the Gallo Asphalt Company. Get permission before proceeding to extreme east end of the wharf. The bench marks are located near Crows Mill Road. The tide gage and staff were located on a wharf owned by this company. T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: 1262 A 1975 DESIGNATION: 853 1262 A TIDAL MONUMENTATION: Tidal Station disk VM#: 2518 AGENCY: National Ocean Survey (NOS) IDB PID#: SETTING CLASSIFICATION: Concrete pavement OPUS PID: LATITUDE: 40° 30.5' N ( 40.50830) LONGITUDE: 74° 18.7' W ( -74.31170) The primary bench mark is a disk set flush in the concrete framework of a truck scale located next to the 1-story frame office building of the Gallo Asphalt Company, 18.50 m (60.7 ft) north of the south end of a concrete retaining wall, 13.84 m (45.4 ft) SE of the nearest corner of a 2 m (5 ft) high steel fence, 10.52 m (34.5 ft) west of a steel radio anetenna tower, 5.41 m (17.7 ft) SW of the SE corner of the building, and 1.16 m (3.8 ft) south of the SE corner of the building.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 5 Station ID: 8531262 PUBLICATION DATE: 07/15/2003 Name: KEASBEY, RARITAN RIVER NJ NOAA Chart: 12131 Latitude: 40° 30.5' N ( 40.50830) USGS Quad: PERTH AMBOY Longitude: 74° 18.7' W ( -74.31170) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 1262 B 1975 DESIGNATION: 853 1262 B TIDAL MONUMENTATION: Tidal Station disk VM#: 2519 AGENCY: National Ocean Survey (NOS) IDB PID#: SETTING CLASSIFICATION: Copper-clad steel rod OPUS PID: LATITUDE: 40° 30.5' N ( 40.50830) LONGITUDE: 74° 18.7' W ( -74.31170) The bench mark is a disk located at the Indiana General Electronic Division on Crows Mill Road, 28.16 m (92.4 ft) SE of wood utility pole #12562WB, 23.91 m (78.5 ft) SE of the SW corner of a square steel manhole cover, 17.74 m (58.2 ft) north of the north corner of the main building entrance extension, and 1.43 m (4.7 ft) east of the asphalt curb to the east of the parking area. The bench mark is set 6 cm (0.2 ft) below ground level, and crimped to the top of a copper-clad steel rod driven 9.1 m (30 ft) to refusal. BENCH MARK STAMPING: 1262 C 1975 DESIGNATION: 853 1262 C TIDAL MONUMENTATION: Tidal Station disk VM#: 2520 AGENCY: National Ocean Survey (NOS) IDB PID#: SETTING CLASSIFICATION: Copper-clad steel rod OPUS PID#: BBDC05 LATITUDE: 40° 30.5' N ( 40.50830) LONGITUDE: 74° 18.7' W ( -74.31170) The bench mark is a disk located south of the Union Carbide Keasbey Plant on Crows Mill Road, 18.57 m (60.9 ft) west of a wood utility pole on the west side of Crows Mill Road, 12.13 m (39.8 ft) NE of a flagpole, 10.82 m (35.5 ft) SE of the SW corner of the building in line with three trees, 6.16 m (20.2 ft) SW of the SE corner of the main building. The bench mark is set 6 cm (0.2 ft) below ground level, and crimped to the top of a copper-clad steel rod driven 7.6 m (25 ft) to refusal.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 5 Station ID: 8531262 PUBLICATION DATE: 07/15/2003 Name: KEASBEY, RARITAN RIVER NJ NOAA Chart: 12131 Latitude: 40° 30.5' N ( 40.50830) USGS Quad: PERTH AMBOY Longitude: 74° 18.7' W ( -74.31170) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 1262 D 1975 DESIGNATION: 853 1262 D TIDAL MONUMENTATION: Tidal Station disk VM#: 2521 AGENCY: National Ocean Survey (NOS) IDB PID#: SETTING CLASSIFICATION: Copper-clad steel rod OPUS PID: LATITUDE: 40° 30.5' N ( 40.50830) LONGITUDE: 74° 18.7' W ( -74.31170) The bench mark is a disk located near the intersection of Smith Street and Crows Mill Road north of the Union Carbide Keasbey Complex between two Lehigh Valley railroad tracks, 33.62 m (110.3 ft) SE of the intersection point of the two inside rails, 22.98 m (75.4 ft) north of a fire hydrant, 21.98 m (72.1 ft) NW of utility pole #12557B, 18.23 m (59.8 ft) south of utility pole #60382WB. The bench mark is set at ground level, and crimped to the top of a copper-clad steel rod driven 6.7 m (22 ft) to refusal. BENCH MARK STAMPING: 1262 E 1975 DESIGNATION: 853 1262 E TIDAL MONUMENTATION: Tidal Station disk VM#: 2522 AGENCY: National Ocean Survey (NOS) IDB PID#: SETTING CLASSIFICATION: Building foundation OPUS PID: LATITUDE: 40° 30.5' N ( 40.50830) LONGITUDE: 74° 18.7' W ( -74.31170) The bench mark is a disk set vertically in the south face of the building of the Garden State Shipping Company located near the intersection of Smith Street and Crows Mill Road, diagonally across from the Keasbey Post Office, 22.19 m (72.8 ft) SW of the SE corner of an 2 m (8 ft) high chain link fence enclosure, 21.85 m (71.7 ft) north of the east end of a steel guard rail, 14.87 m (48.8 ft) east of the SE corner of the loading platform, and 0.58 m (1.9 ft) above the pavement.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 5 Station ID: 8531262 PUBLICATION DATE: 07/15/2003 Name: KEASBEY, RARITAN RIVER NJ NOAA Chart: 12131 Latitude: 40° 30.5' N ( 40.50830) USGS Quad: PERTH AMBOY Longitude: 74° 18.7' W ( -74.31170) T I D A L D A T U M S Tidal datums at KEASBEY, RARITAN RIVER based on: LENGTH OF SERIES: 1 Year TIME PERIOD: January 1976 - December 1976 TIDAL EPOCH: 1983-2001 CONTROL TIDE STATION: 8531680 SANDY HOOK Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS: HIGHEST OBSERVED WATER LEVEL (08/09/1976) = 2.395 MEAN HIGHER HIGH WATER MHHW = 1.749 MEAN HIGH WATER MHW = 1.647 MEAN SEA LEVEL MSL = 0.870 MEAN TIDE LEVEL MTL = 0.852 MEAN LOW WATER MLW = 0.058 MEAN LOWER LOW WATER MLLW = 0.000 LOWEST OBSERVED WATER LEVEL (02/02/1976) = -1.427 North American Vertical Datum (NAVD88) Bench Mark Elevation Information In METERS above: Stamping or Designation MLLW MHW 1262 A 1975 3.974 2.327 1262 B 1975 4.677 3.030 1262 C 1975 6.333 4.686 1262 D 1975 11.877 10.230 1262 E 1975 13.663 12.016
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 5 Station ID: 8531262 PUBLICATION DATE: 07/15/2003 Name: KEASBEY, RARITAN RIVER NJ NOAA Chart: 12131 Latitude: 40° 30.5' N ( 40.50830) USGS Quad: PERTH AMBOY Longitude: 74° 18.7' W ( -74.31170) 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.