U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 5 Station ID: 8410715 PUBLICATION DATE: 06/28/2004 Name: GARNET POINT, HERSEY NECK ME NOAA Chart: 13328 Latitude: 44° 55.4' N ( 44.92330) USGS Quad: PEMBROKE Longitude: 67° 7.8' W ( -67.13000) To reach the tidal bench marks from Garnet Point on Hersey Neck, proceed by boat west up the Pennamaquan River for 1.21 km (0.75 mi) to the remains of the R.H. Foster fuel pier. The bench marks are along the beach between the approximate high water line and the tree line in the area of the pier ruins. The gage and tide staff were on a piling cluster about 46 m (150 ft) offshore. T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: 0715 A 1985 DESIGNATION: 841 0715 A TIDAL MONUMENTATION: Tidal Station disk VM#: 1836 AGENCY: National Ocean Survey (NOS) IDB PID#: SETTING CLASSIFICATION: Concrete block OPUS PID: LATITUDE: 44° 55.4' N ( 44.92330) LONGITUDE: 67° 7.8' W ( -67.13000) The primary bench mark is a disk set in the top of a concrete block at the tree line just west of the fuel pier, 6.8 m (22.3 ft) north of the NW corner of the most northerly wooden crib pipe support, 1.5 m (5.0 ft) north of the approximate high water line, 0.9 m (2.8 ft) west of the most westerly of three 6-inch pipes, and 0.6 m (2.0 ft) above ground level.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 5 Station ID: 8410715 PUBLICATION DATE: 06/28/2004 Name: GARNET POINT, HERSEY NECK ME NOAA Chart: 13328 Latitude: 44° 55.4' N ( 44.92330) USGS Quad: PEMBROKE Longitude: 67° 7.8' W ( -67.13000) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 0715 B 1985 DESIGNATION: 841 0715 B TIDAL MONUMENTATION: Tidal Station disk VM#: 1837 AGENCY: National Ocean Survey (NOS) IDB PID#: SETTING CLASSIFICATION: Bedrock outcrop OPUS PID#: BBBF29 LATITUDE: 44° 55.4' N ( 44.92330) LONGITUDE: 67° 7.8' W ( -67.13000) The bench mark is a disk set in the top of a bedrock outcrop SE of the pier ruins, 36.6 m (120.0 ft) SSE of bench mark 0715 A 1985, 27.5 m (90.1 ft) SE of the pier supporting fuel pipes, 5.8 m (19.0 ft) SW of the tree line, and 1.8 m (6.0 ft) NE of the approximate high water line. BENCH MARK STAMPING: 0715 C 1985 DESIGNATION: 841 0715 C TIDAL MONUMENTATION: Tidal Station disk VM#: 1838 AGENCY: National Ocean Survey (NOS) IDB PID#: SETTING CLASSIFICATION: Bedrock outcrop OPUS PID: LATITUDE: 44° 55.4' N ( 44.92330) LONGITUDE: 67° 7.8' W ( -67.13000) The bench mark is a disk set in the top of a bedrock outcrop east of the pier ruins near the approximate high water line, 30.7 m (100.6 ft) east of bench mark 0715 B 1985, and 5.8 m (19.0 ft) south of the tree line.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 5 Station ID: 8410715 PUBLICATION DATE: 06/28/2004 Name: GARNET POINT, HERSEY NECK ME NOAA Chart: 13328 Latitude: 44° 55.4' N ( 44.92330) USGS Quad: PEMBROKE Longitude: 67° 7.8' W ( -67.13000) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 0715 D 1985 DESIGNATION: 841 0715 D TIDAL MONUMENTATION: Tidal Station disk VM#: 1839 AGENCY: National Ocean Survey (NOS) IDB PID#: SETTING CLASSIFICATION: Bedrock outcrop OPUS PID: LATITUDE: 44° 55.4' N ( 44.92330) LONGITUDE: 67° 7.8' W ( -67.13000) The bench mark is a disk set in the top of a bedrock outcrop, 47.9 m (157.0 ft) east of bench mark 0715 C 1985, 5.8 m (19.0 ft) south of the tree line, and 2.3 m (7.4 ft) south of the approximate high water line. BENCH MARK STAMPING: 0715 E 1985 DESIGNATION: 841 0715 E TIDAL MONUMENTATION: Tidal Station disk VM#: 1840 AGENCY: National Ocean Survey (NOS) IDB PID#: SETTING CLASSIFICATION: Bedrock outcrop OPUS PID: LATITUDE: 44° 55.4' N ( 44.92330) LONGITUDE: 67° 7.8' W ( -67.13000) The bench mark is a disk set in the top of a bedrock outcrop west of the pier ruins, 30.8 m (101.0 ft) WSW of bench mark 0715 A 1985, 29.6 m (97.2 ft) NW of the NW corner of the most northerly wooden pier support, 1.2 m (4.0 ft) south of the tree line, at the approximate high water line, and level with the surrounding area.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 5 Station ID: 8410715 PUBLICATION DATE: 06/28/2004 Name: GARNET POINT, HERSEY NECK ME NOAA Chart: 13328 Latitude: 44° 55.4' N ( 44.92330) USGS Quad: PEMBROKE Longitude: 67° 7.8' W ( -67.13000) T I D A L D A T U M S Tidal datums at GARNET POINT, HERSEY NECK based on: LENGTH OF SERIES: 3 MONTHS TIME PERIOD: August 1985 - October 1985 TIDAL EPOCH: 1983-2001 CONTROL TIDE STATION: 8410140 EASTPORT, PASSAMAQUODDY BAY Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS: MEAN HIGHER HIGH WATER MHHW = 6.142 MEAN HIGH WATER MHW = 5.980 MEAN SEA LEVEL MSL = 3.094 MEAN TIDE LEVEL MTL = 3.059 MEAN LOW WATER MLW = 0.137 MEAN LOWER LOW WATER MLLW = 0.000 North American Vertical Datum (NAVD88) Bench Mark Elevation Information In METERS above: Stamping or Designation MLLW MHW 0715 A 1985 7.954 1.974 0715 B 1985 7.050 1.070 0715 C 1985 6.677 0.697 0715 D 1985 6.414 0.434 0715 E 1985 7.083 1.103
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 5 Station ID: 8410715 PUBLICATION DATE: 06/28/2004 Name: GARNET POINT, HERSEY NECK ME NOAA Chart: 13328 Latitude: 44° 55.4' N ( 44.92330) USGS Quad: PEMBROKE Longitude: 67° 7.8' W ( -67.13000) 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.