U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 7 Station ID: 8531545 PUBLICATION DATE: 02/05/2004 Name: KEYPORT, RARITAN BAY NJ NOAA Chart: 12327 Latitude: 40° 26.4' N ( 40.44000) USGS Quad: KEYPORT Longitude: 74° 11.9' W ( -74.19830) To reach the tidal bench marks from the intersection of State Highway 36 and Atlantic Street in the town of Keyport, proceed north on Atlantic Street for 1.4 km (0.9 mi) to First Street, in the vicinity of Keyport Yacht Club on the corner of First Street and Atlantic Street. The tide gage and staff were on the NE corner of the yacht club pier. The bench marks are in the vicinity of the yacht club, and at Chingarora Creek. T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: 1545 A 1975 DESIGNATION: 853 1545 A TIDAL MONUMENTATION: Tidal Station disk VM#: 2545 AGENCY: National Ocean Survey (NOS) IDB PID#: SETTING CLASSIFICATION: Copper-clad steel rod OPUS PID: LATITUDE: 40° 26.4' N ( 40.44000) LONGITUDE: 74° 11.9' W ( -74.19830) The primary bench mark is a disk located on the Keyport Yacht Club property, 20.54 m (67.4 ft) south of the timber bulkhead along the bay, 6.13 m (20.1 ft) NE of SE corner of the club's brick building, 4.02 m (13.2 ft) SE of the NE corner of the same building, and 1.89 m (6.2 ft) SW of the NW corner of a concrete platform. The bench mark is 0.06 m (0.2 ft) below the ground, crimped to the top of a copper-clad steel rod driven 15.2 m (50 ft).
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 7 Station ID: 8531545 PUBLICATION DATE: 02/05/2004 Name: KEYPORT, RARITAN BAY NJ NOAA Chart: 12327 Latitude: 40° 26.4' N ( 40.44000) USGS Quad: KEYPORT Longitude: 74° 11.9' W ( -74.19830) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 1545 B 1975 DESIGNATION: 853 1545 B TIDAL MONUMENTATION: Tidal Station disk VM#: 2546 AGENCY: National Ocean Survey (NOS) IDB PID#: AI8467 SETTING CLASSIFICATION: Copper-clad steel rod OPUS PID: LATITUDE: 40° 26.4' N ( 40.44000) LONGITUDE: 74° 11.8' W ( -74.19670) The bench mark is a disk located in a small park at the north end of Myrtle Avenue, 11.67 m (38.3 ft) south of wood utility pole # JC 479 KPT, 3.78 m (12.4 ft) south of a flagpole, 2.80 m (9.2 ft) south of the NW corner of a marble war moument, and 0.91 m (3.0 ft) east of the edge of a concrete curbing surrounding the flagpole. The bench mark is set 0.06 m (0.2 ft) below the ground, crimped to the top of a copper-clad steel rod driven 12.8 m (42 ft) to refusal. BENCH MARK STAMPING: 1545 C 1975 DESIGNATION: 853 1545 C TIDAL MONUMENTATION: Tidal Station disk VM#: 2547 AGENCY: National Ocean Survey (NOS) IDB PID#: AI8468 SETTING CLASSIFICATION: Copper-clad steel rod OPUS PID: LATITUDE: 40° 26.4' N ( 40.44000) LONGITUDE: 74° 11.4' W ( -74.19000) The bench mark is a disk located near the bridge over Chingarora Creek, 14.20 m (46.6 ft) SW of the centerline of Walnut Street, 9.42 m (30.9 ft) NW of the centerline of First Street, 8.60 m (28.2 ft) SW of a hydrant, 7.77 m (25.5 ft) NE of the SE corner of the one-story brick building of Bridgeview Apartments, and 5.67 m (18.6 ft) SE of a sewer manhole on the same property. The bench mark is set 0.06 m (0.2 ft) below the ground, crimped to the top of a copper-clad steel rod driven 12.2 m (40 ft) to refusal.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 7 Station ID: 8531545 PUBLICATION DATE: 02/05/2004 Name: KEYPORT, RARITAN BAY NJ NOAA Chart: 12327 Latitude: 40° 26.4' N ( 40.44000) USGS Quad: KEYPORT Longitude: 74° 11.9' W ( -74.19830) T I D A L B E N C H M A R K S BENCH MARK STAMPING: NO 2 1934 DESIGNATION: TIDAL 2 STA 17 MONUMENTATION: Tidal Station disk VM#: 2548 AGENCY: National Ocean Survey (NOS) IDB PID#: KV0754 SETTING CLASSIFICATION: Concrete monument OPUS PID: LATITUDE: 40° 26.3' N ( 40.43830) LONGITUDE: 74° 11.6' W ( -74.19330) The bench mark is a disk set in the top of a concrete post, located 0.2 km (0.1 mi) north along Myrtle Avenue from the intersection of First Street and Myrtle Avenue, 12.80 m (42.0 ft) NE of a fire hydrant, 11.58 m (38.0 ft) ENE of power pole # 189 W, and 0.03 m (0.1 ft) below the ground.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 7 Station ID: 8531545 PUBLICATION DATE: 02/05/2004 Name: KEYPORT, RARITAN BAY NJ NOAA Chart: 12327 Latitude: 40° 26.4' N ( 40.44000) USGS Quad: KEYPORT Longitude: 74° 11.9' W ( -74.19830) T I D A L B E N C H M A R K S BENCH MARK STAMPING: U 53 1961 DESIGNATION: U 53 MONUMENTATION: Bench Mark disk VM#: 2549 AGENCY: US Coast & Geodetic Survey (USC&GS) IDB PID#: KV0756 SETTING CLASSIFICATION: Pumping station OPUS PID: LATITUDE: 40° 26.4' N ( 40.44000) LONGITUDE: 74° 11.5' W ( -74.19170) The bench mark is a disk set in the west face of the SW corner of the Keyport Water Works Pumping Station, 51 m (166 ft) WSW of bench mark NO 2 1934, 7 m (22 ft) north of the NE corner of a small brick building, and 1.37 m (4.5 ft) above the ground.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 7 Station ID: 8531545 PUBLICATION DATE: 02/05/2004 Name: KEYPORT, RARITAN BAY NJ NOAA Chart: 12327 Latitude: 40° 26.4' N ( 40.44000) USGS Quad: KEYPORT Longitude: 74° 11.9' W ( -74.19830) T I D A L B E N C H M A R K S BENCH MARK STAMPING: P 36 1965 DESIGNATION: P 36 RESET MONUMENTATION: Bench Mark disk VM#: 2550 AGENCY: US Coast & Geodetic Survey (USC&GS) IDB PID#: KV0749 SETTING CLASSIFICATION: Bridge abutment OPUS PID: LATITUDE: 40° 26.4' N ( 40.44000) LONGITUDE: 74° 11.3' W ( -74.18830) The bench mark is a disk set in top of the south end of the west abutment of a bridge over Chingarora Creek, 15.09 m (49.5 ft) east of power pole # 100W, 4.69 m (15.4 ft) south of the centerline of Stone Street, and 0.24 m (0.8 ft) west of the east edge of the abutment.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 6 of 7 Station ID: 8531545 PUBLICATION DATE: 02/05/2004 Name: KEYPORT, RARITAN BAY NJ NOAA Chart: 12327 Latitude: 40° 26.4' N ( 40.44000) USGS Quad: KEYPORT Longitude: 74° 11.9' W ( -74.19830) T I D A L D A T U M S Tidal datums at KEYPORT, RARITAN BAY based on: LENGTH OF SERIES: 9 MONTHS TIME PERIOD: March 1976 - November 1976 TIDAL EPOCH: 1983-2001 CONTROL TIDE STATION: 8531680 SANDY HOOK Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS: MEAN HIGHER HIGH WATER MHHW = 1.705 MEAN HIGH WATER MHW = 1.604 North American Vertical Datum NAVD88 = 0.894 MEAN SEA LEVEL MSL = 0.863 MEAN TIDE LEVEL MTL = 0.834 MEAN LOW WATER MLW = 0.065 MEAN LOWER LOW WATER MLLW = 0.000 North American Vertical Datum (NAVD88) Bench Mark Elevation Information In METERS above: Stamping or Designation MLLW MHW 1545 A 1975 7.501 5.897 1545 B 1975 5.528 3.924 1545 C 1975 3.213 1.609 NO 2 1934 6.148 4.544 U 53 1961 6.183 4.579 P 36 1965 3.688 2.084
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 7 of 7 Station ID: 8531545 PUBLICATION DATE: 02/05/2004 Name: KEYPORT, RARITAN BAY NJ NOAA Chart: 12327 Latitude: 40° 26.4' N ( 40.44000) USGS Quad: KEYPORT Longitude: 74° 11.9' W ( -74.19830) 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.