U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 5 Station ID: 8448157 PUBLICATION DATE: 04/06/2012 Name: VINEYARD HAVEN, VINEYARD HVN HBR MA NOAA Chart: 13233 Latitude: 41° 27.5' N ( 41.45830) USGS Quad: VINEYARD HAVEN Longitude: 70° 36.0' W ( -70.60000) To reach the tide station at Vineyard Haven from the Vineyard Haven Ferry Terminal, travel south on Water Street approximately 0.16 km (0.1 mi) to the intersection known as Five Corners, then turn right on S. Main Street heading west of the intersection of S. Main Street and Main Street, then turn right onto Main Street heading north. Travel on Main Street for 0.32 km (0.2 mi), then turn right into the William Barry Owen Playground and Recreation Area. The tide gauge and staff are located on the end of the Vineyard Haven City Pier in the William Barry Owent Playground and Recreation Area. T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: 8157 A 1994 DESIGNATION: MONUMENTATION: Bench Mark disk VM#: 19468 AGENCY: National Ocean Survey (NOS) IDB PID#: SETTING CLASSIFICATION: Stainless steel rod OPUS PID: LATITUDE: 41° 27.5' N ( 41.45830) LONGITUDE: 70° 36.0' W ( -70.60000) The primary bench mark is a disk located in the William Barry Owen Park in Vineyard Haven, 32.0 m (105.0 ft) SE of the second lightpost from the beach, 22.5 m (73.8 ft) east of the eastern corner of the stone wall along the fence line, 16.6 m (54.5 ft) west of the west corner of the Harbormaster's shed, and 0.5 m (1.5 ft) NE of the third post from the gate along the fence. The bench mark is crimped to a stainless steel rod driven 25.6 m (84.0 ft) to refusal, and encased in a 5-inch NOS logo cap. BENCH MARK STAMPING: VH 1 1994 DESIGNATION: MONUMENTATION: Bench Mark disk VM#: 19469 AGENCY: National Ocean Survey (NOS) IDB PID#: SETTING CLASSIFICATION: Concrete base OPUS PID: LATITUDE: 41° 27.5' N ( 41.45830) LONGITUDE: 70° 36.0' W ( -70.60000) The bench mark is a disk set in the southeast corner of the cement base of a telephone booth at the William Barry Owen Park, located 7.5 m (24.6 ft) NNE of the NE support foundation of the Vineyard Haven Harbormaster's shed, 12.8 m (42.0 ft) south of the center of the lower parking area at the park, 64.0 m (210.0 ft) east of the NE corner of a gazebo, and 126.0 m (413.4 ft) east of the centerline of Main Street and the intersection of the drive leading to the parking area of the park.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 5 Station ID: 8448157 PUBLICATION DATE: 04/06/2012 Name: VINEYARD HAVEN, VINEYARD HVN HBR MA NOAA Chart: 13233 Latitude: 41° 27.5' N ( 41.45830) USGS Quad: VINEYARD HAVEN Longitude: 70° 36.0' W ( -70.60000) T I D A L B E N C H M A R K S BENCH MARK STAMPING: VH 2 1994 MONUMENTATION: Bench Mark disk VM#: 19470 AGENCY: National Ocean Survey (NOS) IDB PID#: SETTING CLASSIFICATION: Step OPUS PID: LATITUDE: 41° 27.5' N ( 41.45830) LONGITUDE: 70° 36.0' W ( -70.60000) The bench mark is a disk set in the northeast corner of the step to the gazebo in the William Barry Owen Playground and Recreation Area, located 12.0 m (39.4 ft) SE of the second lightpost counting from Main Street to the gazebo, 32.3 m (106.0 ft) east of the flagpole in the park, and 52.0 m (170.6 ft) east of the centerline of Main Street. BENCH MARK STAMPING: VH 3 1994 MONUMENTATION: Bench Mark disk VM#: 19471 AGENCY: National Ocean Survey (NOS) IDB PID#: SETTING CLASSIFICATION: Flagpole foundation OPUS PID#: BBDM85 LATITUDE: 41° 27.5' N ( 41.45830) LONGITUDE: 70° 36.0' W ( -70.60000) The bench mark is a disk set in the east side of the flagpole foundation in William Barry Owen Playground and Recreation Area, located 20.3 m (66.6 ft) east of the centerline of the drive leading to the park, 16.0 m (52.5 ft) south of the first power pole in the park counting from Main Street to the gazebo marked NET&T Co, 109, 1, C&VECO, and 17.7 m (58.1 ft) southeast of the first lightpost counting from Main Street to the gazebo.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 5 Station ID: 8448157 PUBLICATION DATE: 04/06/2012 Name: VINEYARD HAVEN, VINEYARD HVN HBR MA NOAA Chart: 13233 Latitude: 41° 27.5' N ( 41.45830) USGS Quad: VINEYARD HAVEN Longitude: 70° 36.0' W ( -70.60000) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 8157 B 1994 MONUMENTATION: Bench Mark disk VM#: 19472 AGENCY: National Ocean Survey (NOS) IDB PID#: SETTING CLASSIFICATION: Stainless steel rod OPUS PID: LATITUDE: 41° 27.5' N ( 41.45830) LONGITUDE: 70° 36.0' W ( -70.60000) The bench mark is a disk located in the William Barry Owen Park in Vineyard Haven, 30.3 m (99.4 ft) north of the second lightpost from the beach, 24.1 m (79.1 ft) east of telephone pole #2, 11.3 m (37.1 ft) NE of the north side of the drive leaing to the park area, and 3.4 m (11.2 ft) SW of a power pole. The bench mark is crimped to a stainless steel rod driven 18.3 m (60.0 ft) to refusal, and encased in a 5-inch NOS logo cap.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 5 Station ID: 8448157 PUBLICATION DATE: 04/06/2012 Name: VINEYARD HAVEN, VINEYARD HVN HBR MA NOAA Chart: 13233 Latitude: 41° 27.5' N ( 41.45830) USGS Quad: VINEYARD HAVEN Longitude: 70° 36.0' W ( -70.60000) T I D A L D A T U M S Tidal datums at VINEYARD HAVEN, VINEYARD HVN HBR based on: LENGTH OF SERIES: 2 MONTHS TIME PERIOD: July 1994 - August 1994 TIDAL EPOCH: 1983-2001 CONTROL TIDE STATION: 8447930 WOODS HOLE, BUZZARDS BAY Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS: MEAN HIGHER HIGH WATER MHHW = 0.648 MEAN HIGH WATER MHW = 0.534 MEAN SEA LEVEL MSL = 0.323 MEAN TIDE LEVEL MTL = 0.291 MEAN LOW WATER MLW = 0.048 MEAN LOWER LOW WATER MLLW = 0.000 North American Vertical Datum (NAVD88) Bench Mark Elevation Information In METERS above: Stamping or Designation MLLW MHW 8157 A 1994 1.905 1.371 VH 1 1994 2.221 1.687 VH 2 1994 8.461 7.927 VH 3 1994 11.797 11.263 8157 B 1994 7.803 7.269
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 5 Station ID: 8448157 PUBLICATION DATE: 04/06/2012 Name: VINEYARD HAVEN, VINEYARD HVN HBR MA NOAA Chart: 13233 Latitude: 41° 27.5' N ( 41.45830) USGS Quad: VINEYARD HAVEN Longitude: 70° 36.0' W ( -70.60000) 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.