U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 5 Station ID: 8534540 PUBLICATION DATE: 02/05/2004 Name: ABSECON, ABSECON CREEK NJ NOAA Chart: 12316 Latitude: 39° 25.4' N ( 39.42330) USGS Quad: OCEANVILLE Longitude: 74° 30.0' W ( -74.50000) To reach the tidal bench marks from the intersection of U.S. Highway 30 and U.S. Highway 9, proceed 0.72 km (0.45 mi) SE along U.S. Highway 30 to the South Shore Road bridge over Absecon Creek. The bench marks are located along U.S. Highway 30 (Absecon Boulevard) over Absecon Creek in Absecon. The tide gage and staff were located on a structure attached to the west side of the bridge. T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: 4540 D 1977 DESIGNATION: 853 4540 D TIDAL MONUMENTATION: Tidal Station disk VM#: 2697 AGENCY: National Ocean Survey (NOS) IDB PID#: JU2455 SETTING CLASSIFICATION: Concrete abutment OPUS PID: LATITUDE: 39° 25.4' N ( 39.42330) LONGITUDE: 74° 30.0' W ( -74.50000) The primary bench mark is a disk set on top of an abandoned stone bridge abutment wall on the NW side of Absecon Creek, 24.38 m (80.0 ft) SE of the SE corner of the Phillips gas station (a 1-story concrete block building), 23.41 m (76.8 ft) west of the new bridge west face, 18.07 m (59.3 ft) south of wood utility pole #P41 984, 1.98 m (6.5 ft) north of the south face of the old abutment, and 1.07 m (3.5 ft) east of the west face of the stone abutment.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 5 Station ID: 8534540 PUBLICATION DATE: 02/05/2004 Name: ABSECON, ABSECON CREEK NJ NOAA Chart: 12316 Latitude: 39° 25.4' N ( 39.42330) USGS Quad: OCEANVILLE Longitude: 74° 30.0' W ( -74.50000) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 4540 E 1977 DESIGNATION: 853 4540 E TIDAL MONUMENTATION: Tidal Station disk VM#: 2698 AGENCY: National Ocean Survey (NOS) IDB PID#: JU2456 SETTING CLASSIFICATION: Concrete abutment OPUS PID#: JU2456 LATITUDE: 39° 25.4' N ( 39.42330) LONGITUDE: 74° 30.0' W ( -74.50000) The bench mark is a disk set on top of the SE concrete abutment wall of the South Shore Road bridge over Absecon Creek, on the SE side of the creek, 10.73 m (35.2 ft) west of wood utility pole #P3312, 5.06 m (16.6 ft) NE of the south end of the abutment, 4.85 m (15.9 ft) SW of a fire hydrant, and 3.93 m (12.9 ft) SW along the wall from the south curb of U.S. Highway 30 (Absecon Boulevard). BENCH MARK STAMPING: 4540 F 1977 DESIGNATION: 853 4540 F TIDAL PORTER MONUMENTATION: Tidal Station disk VM#: 2699 AGENCY: National Ocean Survey (NOS) IDB PID#: JU2457 SETTING CLASSIFICATION: Copper-clad steel rod OPUS PID: LATITUDE: 39° 25.4' N ( 39.42330) LONGITUDE: 74° 30.0' W ( -74.50000) The bench mark is a disk located 61 m (200 ft) SE of Bench Mark 4540 E 1977 and 17.43 m (57.2 ft) NE of the NE corner of a service station. The bench mark is 0.06 m (0.2 ft) below ground level, crimped to the top of a copper-clad steel rod driven 15.2 m (50 ft), and encased in a PVC pipe and concrete kickblock. NOTE: The mark was searched but not found in 2002.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 5 Station ID: 8534540 PUBLICATION DATE: 02/05/2004 Name: ABSECON, ABSECON CREEK NJ NOAA Chart: 12316 Latitude: 39° 25.4' N ( 39.42330) USGS Quad: OCEANVILLE Longitude: 74° 30.0' W ( -74.50000) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 4540 G 1977 DESIGNATION: 853 4540 G TIDAL PORTER MONUMENTATION: Tidal Station disk VM#: 2700 AGENCY: National Ocean Survey (NOS) IDB PID#: JU2458 SETTING CLASSIFICATION: Copper-clad steel rod OPUS PID: LATITUDE: 39° 25.3' N ( 39.42170) LONGITUDE: 74° 30.0' W ( -74.50000) The bench mark is a disk located 122 m (400 ft) SE of Bench Mark 4540 F 1977, 36.12 m (118.5 ft) SE of wood utility pole #P13953, 12.50 m (41.0 ft) SW of the centerline of U.S. Highway 30 (Absecon Boulevard), 8.84 m (29.0 ft) east of the east end of the billboard, and 1.62 m (5.3 ft) NW of wood utility pole #43-2 49. The bench mark is 0.06 m (0.2 ft) below ground level, crimped to the top of a copper-clad steel rod driven 15.2 m (50 ft), and encased in a PVC pipe and concrete kickblock. BENCH MARK STAMPING: 4540 H 1977 DESIGNATION: 853 4540 H TIDAL PORTER MONUMENTATION: Tidal Station disk VM#: 2701 AGENCY: National Ocean Survey (NOS) IDB PID#: JU2459 SETTING CLASSIFICATION: Copper-clad steel rod OPUS PID: LATITUDE: 39° 25.3' N ( 39.42170) LONGITUDE: 74° 29.9' W ( -74.49830) The bench mark is a disk located 82 m (269 ft) SE of Bench Mark 4540 G 1977, 54.62 m (179.2 ft) SE of a catch basin, 26.12 m (85.7 ft) NE of wood utility pole #P13557, 14.51 m (47.6 ft) NE of the centerline of U.S. Highway 30, 4 m (13 ft) NE of the NE curb of U.S. Highway 30, and 1.83 m (6.0 ft) east of the east leg of a steel traffic sign. The bench mark is 0.06 m (0.2 ft) below ground level, crimped to the top of a copper-clad steel rod driven 15.2 m (50 ft), and encased in a PVC pipe and concrete kickblock.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 5 Station ID: 8534540 PUBLICATION DATE: 02/05/2004 Name: ABSECON, ABSECON CREEK NJ NOAA Chart: 12316 Latitude: 39° 25.4' N ( 39.42330) USGS Quad: OCEANVILLE Longitude: 74° 30.0' W ( -74.50000) T I D A L D A T U M S Tidal datums at ABSECON, ABSECON CREEK based on: LENGTH OF SERIES: 1 YEAR TIME PERIOD: December 1977 - November 1978 TIDAL EPOCH: 1983-2001 CONTROL TIDE STATION: 8557380 LEWES, FT. MILES Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS: HIGHEST OBSERVED WATER LEVEL (12/19/1977) = 1.922 MEAN HIGHER HIGH WATER MHHW = 1.337 MEAN HIGH WATER MHW = 1.226 North American Vertical Datum NAVD88 = 0.732 MEAN SEA LEVEL MSL = 0.676 MEAN TIDE LEVEL MTL = 0.637 MEAN LOW WATER MLW = 0.048 MEAN LOWER LOW WATER MLLW = 0.000 LOWEST OBSERVED WATER LEVEL (12/10/1977) = -0.776 North American Vertical Datum (NAVD88) Bench Mark Elevation Information In METERS above: Stamping or Designation MLLW MHW 4540 D 1977 2.349 1.123 4540 E 1977 3.443 2.217 4540 F 1977 2.957 1.731 4540 G 1977 2.513 1.287 4540 H 1977 2.222 0.996
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 5 Station ID: 8534540 PUBLICATION DATE: 02/05/2004 Name: ABSECON, ABSECON CREEK NJ NOAA Chart: 12316 Latitude: 39° 25.4' N ( 39.42330) USGS Quad: OCEANVILLE Longitude: 74° 30.0' W ( -74.50000) 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.