U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 7 Station ID: 8535101 PUBLICATION DATE: 05/20/2004 Name: CORSON INLET NJ NOAA Chart: 12316 Latitude: 39° 12.9' N ( 39.21500) USGS Quad: SEA ISLE CITY Longitude: 74° 38.9' W ( -74.64830) To reach the tidal bench marks from the post office in Strathmere, proceed NE on Ocean Drive 0.40 km (0.25 mi) to the toll booth on the bridge over Strathmere Bay, continue NE on Ocean Drive 1.8 km (1.1 mi) to the NE end of the Ocean Drive (Bay Avenue) over Corson Inlet. The bench marks are located along Bay Avenue and the tide gage and staff were located on a platform on the side of the Cape May County bridge over Corson Inlet. T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: 5101 H 1977 DESIGNATION: 853 5101 H TIDAL MONUMENTATION: Tidal Station disk VM#: 2757 AGENCY: National Ocean Survey (NOS) IDB PID#: JU2404 SETTING CLASSIFICATION: Galvanized steel rod OPUS PID: LATITUDE: 39° 13.0' N ( 39.21670) LONGITUDE: 74° 38.8' W ( -74.64670) The bench mark is a disk located 0.2 km (0.1 mi) SW of bench mark 5101 G 1977, 22.40 m (73.5 ft) NW of the NE and of the metal rail on the east side of the Bay Avenue Bridge over Corson Inlet, 19.75 m (64.8 ft) west of wood utility pole #241 on the east side of Bay Avenue, 15.27 m (50.1 ft) north of the NE end of the steel guard rail on the west of the bridge, and 12.04 m (39.5 ft) NW of the centerline of Bay Avenue. The bench mark is set 6 cm (0.2 ft) below ground level, crimped to the top of a galvanized 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 2 of 7 Station ID: 8535101 PUBLICATION DATE: 05/20/2004 Name: CORSON INLET NJ NOAA Chart: 12316 Latitude: 39° 12.9' N ( 39.21500) USGS Quad: SEA ISLE CITY Longitude: 74° 38.9' W ( -74.64830) T I D A L B E N C H M A R K S BENCH MARK STAMPING: CURVE 2 1966 DESIGNATION: CURVE 2 MONUMENTATION: Triangulation Station disk VM#: 2750 AGENCY: US Coast & Geodetic Survey (USC&GS) IDB PID#: JU2410 SETTING CLASSIFICATION: Concrete monument OPUS PID#: JU2410 LATITUDE: 39° 13.6' N ( 39.22670) LONGITUDE: 74° 38.3' W ( -74.63830) The bench mark is a disk set in the top of a 0.15 m (0.5 ft) diameter orangeburg pipe filled with concrete, 8 m (25 ft) SE of the centerline of Bay Avenue, 6 m (19 ft) NE of the NE curb of 55th Street, and 0.30 m (1.0 ft) above ground level. BENCH MARK STAMPING: CI 2 1971 DESIGNATION: 853 5101 CI 2 MONUMENTATION: Bench Mark disk VM#: 2751 AGENCY: US Coast & Geodetic Survey (USC&GS) IDB PID#: SETTING CLASSIFICATION: Concrete filled pipe OPUS PID: LATITUDE: 39° 12.9' N ( 39.21500) LONGITUDE: 74° 38.9' W ( -74.64830) The bench mark is a disk set in the top of a concrete-filled orangeburg pipe, 76 m (250 ft) SW of the south end of the Ocean Drive (Bay Avenue) bridge over Corson Inlet, 8.38 m (27.5 ft) west of the centerline of Ocean Drive, 1.52 m (5.0 ft) NW of Ace Power Pole #15726, and 0.15 m (0.5 ft) above ground level.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 7 Station ID: 8535101 PUBLICATION DATE: 05/20/2004 Name: CORSON INLET NJ NOAA Chart: 12316 Latitude: 39° 12.9' N ( 39.21500) USGS Quad: SEA ISLE CITY Longitude: 74° 38.9' W ( -74.64830) T I D A L B E N C H M A R K S BENCH MARK STAMPING: CI 3 1971 DESIGNATION: 853 5101 CI 3 MONUMENTATION: Bench Mark disk VM#: 2752 AGENCY: US Coast & Geodetic Survey (USC&GS) IDB PID#: SETTING CLASSIFICATION: Concrete filled pipe OPUS PID: LATITUDE: 39° 12.9' N ( 39.21500) LONGITUDE: 74° 38.9' W ( -74.64830) The bench mark is a disk set in top of a concrete-filled orangeburg pipe, 144 m (473 ft) SW of the south end of the Ocean Drive (Bay Avenue) bridge over Corson Inlet, 6 m (21 ft)east of the centerline of Ocean Drive, 0.76 m (2.5 ft) NE of USGG utility pole #251, and 0.15 m (0.5 ft) above ground level. BENCH MARK STAMPING: 5101 D 1977 DESIGNATION: 853 5101 D TIDAL MONUMENTATION: Tidal Station disk VM#: 2753 AGENCY: National Ocean Survey (NOS) IDB PID#: JU2409 SETTING CLASSIFICATION: Galvanized steel rod OPUS PID: LATITUDE: 39° 13.5' N ( 39.22500) LONGITUDE: 74° 38.4' W ( -74.64000) The bench mark is a disk located near the intersection of Bay Avenue and 56th Street, 0.2 km (0.1 mi) NE of bench mark 5101 E 1977, 31.76 m (104.2 ft) SW of the SW corner of House NO. 5545 Bay Avenue (a 2-story frame house), 9.66 m (31.7 ft) south of the SE corner of a steel catch basin, 9 m (30 ft) SE of the centerline of Bay Avenue and 1.68 m (5.5 ft) NE of wood utility pole #211. The bench mark is set 6 cm (0.2 ft) below ground level, crimped to the top of a galvanized 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 7 Station ID: 8535101 PUBLICATION DATE: 05/20/2004 Name: CORSON INLET NJ NOAA Chart: 12316 Latitude: 39° 12.9' N ( 39.21500) USGS Quad: SEA ISLE CITY Longitude: 74° 38.9' W ( -74.64830) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 5101 E 1977 DESIGNATION: 853 5101 E TIDAL MONUMENTATION: Tidal Station disk VM#: 2754 AGENCY: National Ocean Survey (NOS) IDB PID#: JU2408 SETTING CLASSIFICATION: Galvanized steel rod OPUS PID: LATITUDE: 39° 13.5' N ( 39.22500) LONGITUDE: 74° 38.3' W ( -74.63830) The bench mark is a disk located near the intersection of Haven Avenue and 56th Street, 29.20 m (95.8 ft) SW of the SW corner of House NO.5545 Haven Avenue, 15.33 m (50.3 ft) south of the SE corner of a catch basin, 15.03 m (49.3 ft) SW of the SW corner of a second steel catch basin, 12.44 m (40.8 ft) NE of the south end of a 0.76 m (2.5 ft) diameter steel corrugated culvert pipe, and 1.74 m (5.7 ft) south of the wood blockage fence at the south end of Haven Avenue. The bench mark is set 6 cm (0.2 ft) below ground level, crimped to the top of a galvanized steel rod driven 15.2 m (50 ft), and encased in a PVC pipe and concrete kickblock. BENCH MARK STAMPING: 5101 F 1977 DESIGNATION: 853 5101 F TIDAL MONUMENTATION: Tidal Station disk VM#: 2755 AGENCY: National Ocean Survey (NOS) IDB PID#: JU2407 SETTING CLASSIFICATION: Galvanized steel rod OPUS PID: LATITUDE: 39° 13.2' N ( 39.22000) LONGITUDE: 74° 38.6' W ( -74.64330) The bench mark is a disk located 0.3 km (0.2 mi) NE of the NE end of the Bay Avenue bridge over Corson Inlet, 42 m (138 ft) NE of wood utility pole #5238 on the west side of Bay Avenue, 19.99 m (65.6 ft) NE of the steel guard rail alongside Bay Avenue, 7.53 m (24.7 ft) SE of the centerline of Bay Avenue, and 2.01 m (6.6 ft) NW of wood utility pole #228. The bench mark is set 6 cm (0.2 ft) below ground level, crimped to the top of a galvanized 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 5 of 7 Station ID: 8535101 PUBLICATION DATE: 05/20/2004 Name: CORSON INLET NJ NOAA Chart: 12316 Latitude: 39° 12.9' N ( 39.21500) USGS Quad: SEA ISLE CITY Longitude: 74° 38.9' W ( -74.64830) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 5101 G 1977 DESIGNATION: 853 5101 G TIDAL MONUMENTATION: Tidal Station disk VM#: 2756 AGENCY: National Ocean Survey (NOS) IDB PID#: JU2405 SETTING CLASSIFICATION: Galvanized steel rod OPUS PID: LATITUDE: 39° 13.1' N ( 39.21830) LONGITUDE: 74° 38.8' W ( -74.64630) The bench mark is a disk located 0.2 km (0.1 mi) NE of the NE end of the Bay Avenue bridge over Corson Inlet, 35 m (115 ft) SW of wood utility pole #BT 235, 16.34 m (53.6 ft) SE of wood utility pole #05242, 7.47 m (24.5 ft) SE of the centerline of Bay Avenue, and 3.72 m (12.2 ft) NE of wood utility pole #236. The bench mark is set 6 cm (0.2 ft) below ground level, crimped to the top of a galvanized 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 6 of 7 Station ID: 8535101 PUBLICATION DATE: 05/20/2004 Name: CORSON INLET NJ NOAA Chart: 12316 Latitude: 39° 12.9' N ( 39.21500) USGS Quad: SEA ISLE CITY Longitude: 74° 38.9' W ( -74.64830) T I D A L D A T U M S Tidal datums at CORSON INLET based on: LENGTH OF SERIES: 1 YEAR TIME PERIOD: November 1977 - October 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 (10/14/1977) = 2.181 MEAN HIGHER HIGH WATER MHHW = 1.325 MEAN HIGH WATER MHW = 1.207 North American Vertical Datum NAVD88 = 0.723 MEAN SEA LEVEL MSL = 0.635 MEAN TIDE LEVEL MTL = 0.628 MEAN LOW WATER MLW = 0.050 MEAN LOWER LOW WATER MLLW = 0.000 LOWEST OBSERVED WATER LEVEL (01/10/1978) = -1.102 North American Vertical Datum (NAVD88) Bench Mark Elevation Information In METERS above: Stamping or Designation MLLW MHW 5101 H 1977 2.919 1.712 CURVE 2 1966 2.331 1.124 CI 2 1971 3.355 2.148 CI 3 1971 2.992 1.785 5101 D 1977 2.082 0.875 5101 E 1977 1.818 0.611 5101 F 1977 2.330 1.123 5101 G 1977 2.285 1.078
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 7 of 7 Station ID: 8535101 PUBLICATION DATE: 05/20/2004 Name: CORSON INLET NJ NOAA Chart: 12316 Latitude: 39° 12.9' N ( 39.21500) USGS Quad: SEA ISLE CITY Longitude: 74° 38.9' W ( -74.64830) 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.