U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 8 Station ID: 8535163 PUBLICATION DATE: 05/12/2004 Name: STRATHMERE, STRATHMERE BAY NJ NOAA Chart: 12316 Latitude: 39° 12.0' N ( 39.20000) USGS Quad: SEA ISLE CITY Longitude: 74° 39.4' W ( -74.65670) To reach the tidal bench marks from the intersection of Whittier and Commonwealth Avenues at the south end of the Ocean Drive bridge over Strathmere Bay in Strathmere, proceed one block NW to Bayview Drive and the abandoned Coast Guard station. The bench marks are along Whittier and Commonwealth Avenues. The tide gage and staff were located on the NE side of the northeasternmost Coast Guard pier, 24 m (80 ft) offshore of the bulkhead. T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: 5163 A 1977 DESIGNATION: 853 5163 A TIDAL MONUMENTATION: Tidal Station disk VM#: 2762 AGENCY: National Ocean Survey (NOS) IDB PID#: JU2400 SETTING CLASSIFICATION: Galvanized steel rod OPUS PID#: JU2400 LATITUDE: 39° 11.9' N ( 39.19830) LONGITUDE: 74° 39.3' W ( -74.65500) The primary bench mark is a disk located at the intersection of Commonwealth Avenue and Whittier Road, 15 m (49 ft) SW of wood utility pole #291, 12.13 m (39.8 ft) NE of wood utility pole #3651 on the north edge of Whittier Road, 6.28 m (20.6 ft) east of the SE corner of house #101 Whittier Road (a 2-story frame house), and 3.17 m (10.4 ft) NW of the NW curb of Commonwealth 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 8 Station ID: 8535163 PUBLICATION DATE: 05/12/2004 Name: STRATHMERE, STRATHMERE BAY NJ NOAA Chart: 12316 Latitude: 39° 12.0' N ( 39.20000) USGS Quad: SEA ISLE CITY Longitude: 74° 39.4' W ( -74.65670) T I D A L B E N C H M A R K S BENCH MARK STAMPING: STRATHMERE 1932 DESIGNATION: STRATHMERE MONUMENTATION: Triangulation Station disk VM#: 2758 AGENCY: US Coast & Geodetic Survey (USC&GS) IDB PID#: JU0394 SETTING CLASSIFICATION: Concrete monument OPUS PID: LATITUDE: 39° 11.9' N ( 39.19830) LONGITUDE: 74° 39.4' W ( -74.65670) The bench mark is a disk set in the top of a concrete monument under the concrete apron at the west entrance to the Coast Guard garage, 46.76 m (153.4 ft) south of bench mark STRATHMERE NO 1 1932, and 11 m (36 ft) SW of the south leg of the flagpole.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 8 Station ID: 8535163 PUBLICATION DATE: 05/12/2004 Name: STRATHMERE, STRATHMERE BAY NJ NOAA Chart: 12316 Latitude: 39° 12.0' N ( 39.20000) USGS Quad: SEA ISLE CITY Longitude: 74° 39.4' W ( -74.65670) T I D A L B E N C H M A R K S BENCH MARK STAMPING: STRATHMERE NO 1 1932 DESIGNATION: STRATHMERE RM 1 MONUMENTATION: Reference Mark disk VM#: 2759 AGENCY: US Coast & Geodetic Survey (USC&GS) IDB PID#: JU0393 SETTING CLASSIFICATION: Concrete monument OPUS PID: LATITUDE: 39° 12.0' N ( 39.20000) LONGITUDE: 74° 39.4' W ( -74.65670) The bench mark is set in a concrete monument at the NE corner of Bayview Drive and Whittier Road, 21.49 m (70.5 ft) north and across Whittier Road from the NW corner of the U.S. Coast Guard building, 6 m (20 ft) NE of the centerline of Whittier Road, 5.33 m (17.5 ft) SE of the centerline of Bayview Drive, 0.30 m (1.0 ft) NW of a street sign marker, and 6 cm (0.2 ft) above the sidewalk.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 8 Station ID: 8535163 PUBLICATION DATE: 05/12/2004 Name: STRATHMERE, STRATHMERE BAY NJ NOAA Chart: 12316 Latitude: 39° 12.0' N ( 39.20000) USGS Quad: SEA ISLE CITY Longitude: 74° 39.4' W ( -74.65670) T I D A L B E N C H M A R K S BENCH MARK STAMPING: STRATHMERE NO 4 1932 DESIGNATION: STRATHMERE RM 4 MONUMENTATION: Reference Mark disk VM#: 2760 AGENCY: US Coast & Geodetic Survey (USC&GS) IDB PID#: JU2401 SETTING CLASSIFICATION: Concrete monument OPUS PID: LATITUDE: 39° 11.9' N ( 39.19830) LONGITUDE: 74° 39.4' W ( -74.65670) The bench mark is a disk set in the top of a concrete monument, 32.25 m (105.8 ft) west of bench mark STRATHMERE 1932, 14 m (46 ft) SE of the east corner of the Coast Guard building, 10 m (34 ft) SW of the centerline of Whittier Road, 5 m (16 ft) NE of the east corner of the concrete block foundation, 4 m (13 ft) east of a witness post, and 1.43 m (4.7 ft) east of the east leg of the flagpole.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 8 Station ID: 8535163 PUBLICATION DATE: 05/12/2004 Name: STRATHMERE, STRATHMERE BAY NJ NOAA Chart: 12316 Latitude: 39° 12.0' N ( 39.20000) USGS Quad: SEA ISLE CITY Longitude: 74° 39.4' W ( -74.65670) T I D A L B E N C H M A R K S BENCH MARK STAMPING: U 57 1961 DESIGNATION: U 57 MONUMENTATION: Bench Mark disk VM#: 2761 AGENCY: US Coast & Geodetic Survey (USC&GS) IDB PID#: JU0392 SETTING CLASSIFICATION: Concrete abutment OPUS PID: LATITUDE: 39° 12.1' N ( 39.20170) LONGITUDE: 74° 39.4' W ( -74.65670) The bench mark is a disk set in the east concrete abutment inside the guard rail at the south end of the bridge over Strathmere Bay, 4 m (13 ft) east of the centerline of Ocean Drive, 0.3 m (1 ft) west of the guard rail, and 0.3 m (1 ft) above road level. BENCH MARK STAMPING: 5163 B 1977 DESIGNATION: 853 5163 B TIDAL MONUMENTATION: Tidal Station disk VM#: 2763 AGENCY: National Ocean Survey (NOS) IDB PID#: JU2403 SETTING CLASSIFICATION: Galvanized steel rod OPUS PID: LATITUDE: 39° 12.0' N ( 39.20000) LONGITUDE: 74° 39.3' W ( -74.65500) The bench mark is a disk located set in front of the Ocean Drive bridge sign, 122 m (400 ft) NE of bench mark 5163 A 1977, 45.51 m (149.3 ft) SW of the west corner of house #400 Commonwealth Avenue (a 2-story wood frame house), 6.04 m (19.8 ft) NW of the NW curb of Commonwealth Avenue, 4.51 m (14.8 ft) south of wood utility pole #W27679, and 2 m (7 ft) east of the east edge of Ocean Drive roadway. 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 8 Station ID: 8535163 PUBLICATION DATE: 05/12/2004 Name: STRATHMERE, STRATHMERE BAY NJ NOAA Chart: 12316 Latitude: 39° 12.0' N ( 39.20000) USGS Quad: SEA ISLE CITY Longitude: 74° 39.4' W ( -74.65670) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 5163 C 1977 DESIGNATION: 853 5163 C TIDAL MONUMENTATION: Tidal Station disk VM#: 2764 AGENCY: National Ocean Survey (NOS) IDB PID#: JU2402 SETTING CLASSIFICATION: Galvanized steel rod OPUS PID: LATITUDE: 39° 11.9' N ( 39.19830) LONGITUDE: 74° 39.3' W ( -74.65500) The bench mark is a disk located set south of Whittier Road, 29.26 m (96.0 ft) NE of the NE corner of the last house on Whittier Road next to the beach, 14.75 m (48.40 ft) NW of the bulkhead bordering the west side of the beach area, 9.81 m (32.2 ft) east of wood utility pole #3655, and 8.53 m (28.0 ft) NE of the centerline of Whittier Road. The bench mark is set level with the ground, 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 7 of 8 Station ID: 8535163 PUBLICATION DATE: 05/12/2004 Name: STRATHMERE, STRATHMERE BAY NJ NOAA Chart: 12316 Latitude: 39° 12.0' N ( 39.20000) USGS Quad: SEA ISLE CITY Longitude: 74° 39.4' W ( -74.65670) T I D A L D A T U M S Tidal datums at STRATHMERE, STRATHMERE BAY 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) = 2.235 MEAN HIGHER HIGH WATER MHHW = 1.330 MEAN HIGH WATER MHW = 1.210 North American Vertical Datum NAVD88 = 0.735 MEAN SEA LEVEL MSL = 0.648 MEAN TIDE LEVEL MTL = 0.630 MEAN LOW WATER MLW = 0.051 MEAN LOWER LOW WATER MLLW = 0.000 LOWEST OBSERVED WATER LEVEL (01/10/1978) = -1.398 North American Vertical Datum (NAVD88) Bench Mark Elevation Information In METERS above: Stamping or Designation MLLW MHW 5163 A 1977 2.137 0.927 STRATHMERE 1932 2.154 0.944 STRATHMERE NO 1 1932 2.326 1.116 STRATHMERE NO 4 1932 2.381 1.171 U 57 1961 3.948 2.738 5163 B 1977 2.425 1.215 5163 C 1977 3.148 1.938
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 8 of 8 Station ID: 8535163 PUBLICATION DATE: 05/12/2004 Name: STRATHMERE, STRATHMERE BAY NJ NOAA Chart: 12316 Latitude: 39° 12.0' N ( 39.20000) USGS Quad: SEA ISLE CITY Longitude: 74° 39.4' W ( -74.65670) 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.