U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 5 Station ID: 8419399 PUBLICATION DATE: 05/20/2004 Name: CAPE NEDDICK ME NOAA Chart: 13283 Latitude: 43° 10.0' N ( 43.16670) USGS Quad: YORK BEACH Longitude: 70° 35.6' W ( -70.59330) To reach the tidal bench marks from the intersection of U.S. Highways 1 and 1A in York Village, proceed SE then north on U.S. Highway 1A to Cape Neddick, then turn rigth and proceed SE on Nubble Road to Sohier Park on the easternmost point of Cape Neddick. The bench marks are located in the area around the park. The tide gage and staff were north of the northernmost of two telescope observation platforms in the park. T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: 9399 A 1976 DESIGNATION: 841 9399 A TIDAL MONUMENTATION: Tidal Station disk VM#: 1954 AGENCY: National Ocean Survey (NOS) IDB PID#: SETTING CLASSIFICATION: Concrete platform OPUS PID: LATITUDE: 43° 10.0' N ( 43.16670) LONGITUDE: 70° 35.6' W ( -70.59330) The primary bench mark is a disk set in the northernmost of two telescope observation platforms in the park, 61 m (200 ft) south of the north shoreline, and north of the dirt roads. BENCH MARK STAMPING: 9399 B 1976 DESIGNATION: 841 9399 B TIDAL MONUMENTATION: Tidal Station disk VM#: 1955 AGENCY: National Ocean Survey (NOS) IDB PID#: SETTING CLASSIFICATION: Rock outcrop OPUS PID: LATITUDE: 43° 10.0' N ( 43.16670) LONGITUDE: 70° 35.6' W ( -70.59330) The bench mark is a disk set in a rock outcrop at the easternmost point of Sohier Park, 46 m (150 ft) east of the northernmost of two telescope observation platforms in the park, 30 m (100 ft) south of the north shoreline, and 6 m (20 ft) west of the utility pole leading to the Cape Neddick Light.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 5 Station ID: 8419399 PUBLICATION DATE: 05/20/2004 Name: CAPE NEDDICK ME NOAA Chart: 13283 Latitude: 43° 10.0' N ( 43.16670) USGS Quad: YORK BEACH Longitude: 70° 35.6' W ( -70.59330) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 9399 C 1976 DESIGNATION: 841 9399 C TIDAL MONUMENTATION: Tidal Station disk VM#: 1956 AGENCY: National Ocean Survey (NOS) IDB PID#: SETTING CLASSIFICATION: Bedrock OPUS PID: LATITUDE: 43° 10.0' N ( 43.16670) LONGITUDE: 70° 35.6' W ( -70.59330) The bench mark is a disk set in bedrock on the SE side of the parking lot at Sohier Park, 1 m (2 ft) SW of the southernmost of two telescope observation platforms in the park. BENCH MARK STAMPING: 9399 D 1976 DESIGNATION: 841 9399 D TIDAL MONUMENTATION: Tidal Station disk VM#: 1957 AGENCY: National Ocean Survey (NOS) IDB PID#: SETTING CLASSIFICATION: Rock OPUS PID: LATITUDE: 43° 10.0' N ( 43.16670) LONGITUDE: 70° 35.6' W ( -70.59330) The bench mark is a disk set in rock, 33 m (108 ft) north of the centerline of the northernmost dirt road in Sohier Park, 30 m (100 ft) south of the north shoreline, and 8 m (25 ft) NE of Fox's Lobster House Restaurant and Lounge.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 5 Station ID: 8419399 PUBLICATION DATE: 05/20/2004 Name: CAPE NEDDICK ME NOAA Chart: 13283 Latitude: 43° 10.0' N ( 43.16670) USGS Quad: YORK BEACH Longitude: 70° 35.6' W ( -70.59330) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 9399 E 1976 DESIGNATION: 841 9399 E TIDAL MONUMENTATION: Tidal Station disk VM#: 1958 AGENCY: National Ocean Survey (NOS) IDB PID#: SETTING CLASSIFICATION: Rock OPUS PID: LATITUDE: 43° 10.0' N ( 43.16670) LONGITUDE: 70° 35.6' W ( -70.59330) The bench mark is a disk set in rock, 76 m (250 ft) east of the NE corner of Fox's Lobster House Restaurant and Lounge, 46 m (150 ft) south of the north shoreline, 37 m (120 ft) west of the northernmost of two telescope observation platforms in the park, and 15 m (50 ft) north of the centerline of the northernmost dirt road in Sohier Park.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 5 Station ID: 8419399 PUBLICATION DATE: 05/20/2004 Name: CAPE NEDDICK ME NOAA Chart: 13283 Latitude: 43° 10.0' N ( 43.16670) USGS Quad: YORK BEACH Longitude: 70° 35.6' W ( -70.59330) T I D A L D A T U M S Tidal datums at CAPE NEDDICK based on: LENGTH OF SERIES: 1 MONTH TIME PERIOD: September 1976 - September 1976 TIDAL EPOCH: 1983-2001 CONTROL TIDE STATION: 8418150 PORTLAND, CASCO BAY Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS: MEAN HIGHER HIGH WATER MHHW = 2.884 MEAN HIGH WATER MHW = 2.752 MEAN SEA LEVEL MSL = 1.437 MEAN TIDE LEVEL MTL = 1.427 MEAN LOW WATER MLW = 0.102 MEAN LOWER LOW WATER MLLW = 0.000 North American Vertical Datum (NAVD88) Bench Mark Elevation Information In METERS above: Stamping or Designation MLLW MHW 9399 A 1976 8.754 6.002 9399 B 1976 6.907 4.155 9399 C 1976 8.639 5.887 9399 D 1976 5.345 2.593 9399 E 1976 6.172 3.420
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 5 Station ID: 8419399 PUBLICATION DATE: 05/20/2004 Name: CAPE NEDDICK ME NOAA Chart: 13283 Latitude: 43° 10.0' N ( 43.16670) USGS Quad: YORK BEACH Longitude: 70° 35.6' W ( -70.59330) 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.