U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 6 Station ID: 8533987 PUBLICATION DATE: 06/16/2004 Name: WEST CREEK, WESTECUNK CREEK NJ NOAA Chart: 12324 Latitude: 39° 37.9' N ( 39.63170) USGS Quad: WEST CREEK Longitude: 74° 17.8' W ( -74.29670) To reach the tidal bench marks in West Creek proceed 1.05 km (0.65 mi) SE along Westecunk Creek Dock Road from the intersection of Westecunk Creek Dock Road and U.S. Highway 9 to Westecunk Creek. The bench marks are along Westecunk Creek Dock Road. The tide gage and staff were located on a sea wall at No. 133 Dock Road. T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: 3987 A 1976 DESIGNATION: 853 3987 A TIDAL MONUMENTATION: Tidal Station disk VM#: 2605 AGENCY: National Ocean Survey (NOS) IDB PID#: SETTING CLASSIFICATION: Copper clad steel rod OPUS PID: LATITUDE: 39° 37.9' N ( 39.63170) LONGITUDE: 74° 17.8' W ( -74.29670) The primary bench mark is a disk located 57.06 m (187.2 ft) west of the NW corner of a one-story block garage south of a dwelling at 133 Dock Road, 24 m (79 ft) south of the bulkhead on the SW side of Westecunk Creek, 8.99 m (29.5 ft) NE of the centerline of Dock Road, and 1.28 m (4.2 ft) SE of utility pole No. P39876. The bench mark is set 6 cm (0.2 ft) below ground level, crimped to the top of a copper-coated steel rod driven 9.8 m (32 ft) to refusal, and encased in a PVC pipe and concrete kickblock.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 6 Station ID: 8533987 PUBLICATION DATE: 06/16/2004 Name: WEST CREEK, WESTECUNK CREEK NJ NOAA Chart: 12324 Latitude: 39° 37.9' N ( 39.63170) USGS Quad: WEST CREEK Longitude: 74° 17.8' W ( -74.29670) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 3987 B 1976 DESIGNATION: 853 3987 B TIDAL MONUMENTATION: Tidal Station disk VM#: 2606 AGENCY: National Ocean Survey (NOS) IDB PID#: SETTING CLASSIFICATION: Copper clad steel rod OPUS PID: LATITUDE: 39° 37.9' N ( 39.63170) LONGITUDE: 74° 17.8' W ( -74.29670) The bench mark is a disk located 0.3 km (0.2 mi) NW of bench mark 3987 A 1976, 8.32 m (27.3 ft) south of the centerline of Dock Road, and 1.01 m (3.3 ft) NW of utility pole No. P10130. The bench mark is set 6 cm (0.2 ft) below ground level, crimped to the top of a copper-coated steel rod driven 9.4 m (31 ft) to refusal, and encased in a PVC pipe and concrete kickblock. BENCH MARK STAMPING: 3987 C 1977 DESIGNATION: 853 3987 C TIDAL MONUMENTATION: Tidal Station disk VM#: 2607 AGENCY: National Ocean Survey (NOS) IDB PID#: SETTING CLASSIFICATION: Concrete abutment OPUS PID: LATITUDE: 39° 37.9' N ( 39.63170) LONGITUDE: 74° 17.8' W ( -74.29670) The bench mark is a disk at West Creek, set in the top of the north end of the west concrete abutment of the U.S. Highway 9 bridge over Westecunk Creek, 31.76 m (104.2 ft) NW of utility pole No. 6435, 16.86 m (55.3 ft) west of utility pole No. 6436, and 4.36 m (14.3 ft) NW of a catch basin on the west side of U.S. Highway 9.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 6 Station ID: 8533987 PUBLICATION DATE: 06/16/2004 Name: WEST CREEK, WESTECUNK CREEK NJ NOAA Chart: 12324 Latitude: 39° 37.9' N ( 39.63170) USGS Quad: WEST CREEK Longitude: 74° 17.8' W ( -74.29670) T I D A L B E N C H M A R K S BENCH MARK STAMPING: B 55 1961 DESIGNATION: B 55 MONUMENTATION: Bench Mark disk VM#: 2608 AGENCY: US Coast & Geodetic Survey (USC&GS) IDB PID#: JU0125 SETTING CLASSIFICATION: Concrete monument OPUS PID#: JU0125 LATITUDE: 39° 37.9' N ( 39.63170) LONGITUDE: 74° 17.8' W ( -74.29670) The bench mark is a disk located 1.05 km (0.65 mi) SE on Westecunk Creek Dock Road from the intersection with U.S. Highway 9 in West Creek, 9.75 m (32.0 ft) NW of the centerline of a driveway leading to Creston Court, 9 m (30 ft) SW of the centerline of Westecunk Creek Dock Road, 1.98 m (6.5 ft) NW of a cable line pole, 0.30 m (1.0 ft) below road surface, and set into the top of a concrete post.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 6 Station ID: 8533987 PUBLICATION DATE: 06/16/2004 Name: WEST CREEK, WESTECUNK CREEK NJ NOAA Chart: 12324 Latitude: 39° 37.9' N ( 39.63170) USGS Quad: WEST CREEK Longitude: 74° 17.8' W ( -74.29670) T I D A L B E N C H M A R K S BENCH MARK STAMPING: J 67 1964 DESIGNATION: J 67 MONUMENTATION: Bench Mark disk VM#: 2609 AGENCY: US Coast & Geodetic Survey (USC&GS) IDB PID#: JU0089 SETTING CLASSIFICATION: Copper clad steel rod OPUS PID: LATITUDE: 39° 38.0' N ( 39.63330) LONGITUDE: 74° 18.6' W ( -74.31000) The bench mark is a disk located 0.2 km (0.1 mi) SW along U.S. Highway 9 from the Post Office at West Creek, and 0.1 km (0.05 mi) NW along Thomas Avenue, near the east corner of a cemetery, 8.53 m (28.0 ft) SW of the centerline of Thomas Avenue, and 0.30 m (1.0 ft) NE of the brick wall along the NE side of the cemetery. The bench mark is set at ground level, crimped to the top of a copper-coated steel rod driven 29.2 m (96 ft), and encased in an 8-inch protector tile.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 6 Station ID: 8533987 PUBLICATION DATE: 06/16/2004 Name: WEST CREEK, WESTECUNK CREEK NJ NOAA Chart: 12324 Latitude: 39° 37.9' N ( 39.63170) USGS Quad: WEST CREEK Longitude: 74° 17.8' W ( -74.29670) T I D A L D A T U M S Tidal datums at WEST CREEK, WESTECUNK CREEK based on: LENGTH OF SERIES: 9 MONTHS TIME PERIOD: March 1977 - November 1977 TIDAL EPOCH: 1983-2001 CONTROL TIDE STATION: 8557380 LEWES, FT. MILES Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS: MEAN HIGHER HIGH WATER MHHW = 0.742 MEAN HIGH WATER MHW = 0.661 MEAN TIDE LEVEL MTL = 0.344 North American Vertical Datum NAVD88 = 0.344 MEAN SEA LEVEL MSL = 0.340 MEAN LOW WATER MLW = 0.027 MEAN LOWER LOW WATER MLLW = 0.000 North American Vertical Datum (NAVD88) Bench Mark Elevation Information In METERS above: Stamping or Designation MLLW MHW 3987 A 1976 1.220 0.559 3987 B 1976 0.943 0.282 3987 C 1977 2.868 2.207 B 55 1961 1.368 0.707 J 67 1964 8.447 7.786
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 6 of 6 Station ID: 8533987 PUBLICATION DATE: 06/16/2004 Name: WEST CREEK, WESTECUNK CREEK NJ NOAA Chart: 12324 Latitude: 39° 37.9' N ( 39.63170) USGS Quad: WEST CREEK Longitude: 74° 17.8' W ( -74.29670) 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.