U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 9 Station ID: 8654467 PUBLICATION DATE: 10/07/2020 Name: USCG STATION HATTERAS, PAMLICO SOUND NC NOAA Chart: 11555 Latitude: 35° 12.5' N ( 35.20864) USGS Quad: HATTERAS Longitude: 75° 42.2' W ( -75.70417) To reach the station from the Post Office in Hatteras Village proceed 2.092 km (1.3 miles) south on Hwy 12 to Coast Guard road and turn right on Coast Guard road and proceed to the gate. Pass through the gate, turn to the right and drive to docks. The station is located in the NW corner of the small boat dock. The bench marks are along the open area near the water. T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: 4467 C 2010 DESIGNATION: 865 4467 C MONUMENTATION: Flange-encased Rod VM#: 19621 AGENCY: NOS IDB PID#: SETTING CLASSIFICATION: Stainless steel rod in sleeve OPUS PID#: BBFF30 LATITUDE: 35° 12.3' N ( 35.20500) LONGITUDE: 75° 42.2' W ( -75.70330) The primary bench mark is a stainless steel deep rod driven 35.1 m (115.2 ft) to refusal with a NOS logo cap and concrete kick block, northwest corner of a helicopter pad, 30.4 m (99.7 ft) south of the south edge of a rock jetty, 24.96 m (81.9 ft) north-northwest of the southeast corner of the helicopter pad, and 1.82 m (6.0 ft) west of the northwest corner of the helicopter pad. *Note - this mark does not meet the specifications of a class 'A' rod mark.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 9 Station ID: 8654467 PUBLICATION DATE: 10/07/2020 Name: USCG STATION HATTERAS, PAMLICO SOUND NC NOAA Chart: 11555 Latitude: 35° 12.5' N ( 35.20864) USGS Quad: HATTERAS Longitude: 75° 42.2' W ( -75.70417) T I D A L B E N C H M A R K S BENCH MARK STAMPING: CAHA 23 2010 DESIGNATION: CAHA 23 MONUMENTATION: Metal Rod VM#: 19623 AGENCY: NOS IDB PID#: DN6302 SETTING CLASSIFICATION: Stainless steel rod in sleeve OPUS PID: LATITUDE: 35° 12.4' N ( 35.20714) LONGITUDE: 75° 42.3' W ( -75.70469) The bench mark is a deep-driven rod with a 13 cm (5 inch) NOS logo cap, 23.42 m (76.8 ft) east of a red fire hydrant, 21.90 m (71.9 ft) northwest of the center of a concrete pump station, and 6.98 m (22.9 ft) north-northeast of the center of a paved road leading to the USGS base. BENCH MARK STAMPING: 4467 B 2010 DESIGNATION: 865 4467 B MONUMENTATION: Tidal Station disk VM#: 19624 AGENCY: NOS IDB PID: SETTING CLASSIFICATION: Concrete ledge OPUS PID: LATITUDE: 35° 12.5' N ( 35.20831) LONGITUDE: 75° 42.2' W ( -75.70392) The bench mark is a disk set flush in the concrete cap on the south corner of the dock, 33.38 m (109.5 ft) southwest of the offshore end of the dock, 29.13 m (95.6 ft) north-northeast of the northeast corner of a block garage, and 22.70 m (74.5 ft) southeast of a metal light pole.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 9 Station ID: 8654467 PUBLICATION DATE: 10/07/2020 Name: USCG STATION HATTERAS, PAMLICO SOUND NC NOAA Chart: 11555 Latitude: 35° 12.5' N ( 35.20864) USGS Quad: HATTERAS Longitude: 75° 42.2' W ( -75.70417) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 4467 A 2010 DESIGNATION: 865 4467 A MONUMENTATION: Tidal Station disk VM#: 19625 AGENCY: NOS IDB PID: SETTING CLASSIFICATION: Concrete ledge OPUS PID: LATITUDE: 35° 12.5' N ( 35.20864) LONGITUDE: 75° 42.2' W ( -75.70417) The bench mark is a NOS disk set flush in the concrete cap at the northwest corner of the bulkhead near the NOAA tide station, 32.30 m (106.0 ft) southwest of the northeast outside corner of the dock, 22.20 m (72.8 ft) east of a gazebo, 18.05 m (59.2 ft) north-northwest of a metal light pole, and 12.85 m (42.2 ft) northeast of the northeast corner of a stone fuel pump building. BENCH MARK STAMPING: 4467 D 2015 DESIGNATION: 865 4467 D MONUMENTATION: Tidal Station disk VM#: 21469 AGENCY: NOS IDB PID: SETTING CLASSIFICATION: Concrete Pad OPUS PID: LATITUDE: 35° 12.4' N ( 35.20583) LONGITUDE: 75° 42.3' W ( -75.70483) The bench mark is located on the graveyard of the Atlantic Museum property, 38.40 m (126.0 ft) south of the Hotel De Afrique monument, 14.3 m (46.9 ft) south-southeast of the east facing corner of the USS monitor monument, 2.9 m (9.5 ft) northeast of the edge of the parking lot curb, and 0.7 m (2.3 ft) east of the center of the nautical flag pole.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 9 Station ID: 8654467 PUBLICATION DATE: 10/07/2020 Name: USCG STATION HATTERAS, PAMLICO SOUND NC NOAA Chart: 11555 Latitude: 35° 12.5' N ( 35.20864) USGS Quad: HATTERAS Longitude: 75° 42.2' W ( -75.70417) T I D A L B E N C H M A R K S BENCH MARK STAMPING: NC12 11 2000 DESIGNATION: NC 12 11 MONUMENTATION: Horizontal Station disk VM#: 21470 AGENCY: North Carolina Geodetic Survey IDB PID#: DK3459 SETTING CLASSIFICATION: Concrete monument OPUS PID: LATITUDE: 35° 12.4' N ( 35.20611) LONGITUDE: 75° 42.2' W ( -75.70306) The bench mark is located 19.1 m (62.5 ft) northwest of a NPS monument--P.I. 2877+75--, 17.4 m (57.1 ft) west-southwest of a power pole with transformer and a reference tag, 13.5 m (44.4 ft) south of the centerline of NC 12, 5.4 m (17.8 ft) southwest of the base of the westernmost of 3 guy wires, 0.4 m (1.3 ft) north-northeast of a carsonite witness post.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 9 Station ID: 8654467 PUBLICATION DATE: 10/07/2020 Name: USCG STATION HATTERAS, PAMLICO SOUND NC NOAA Chart: 11555 Latitude: 35° 12.5' N ( 35.20864) USGS Quad: HATTERAS Longitude: 75° 42.2' W ( -75.70417) T I D A L B E N C H M A R K S BENCH MARK STAMPING: NC12 12 2000 DESIGNATION: NC 12 12 MONUMENTATION: Horizontal Station disk VM#: 21471 AGENCY: North Carolina Geodetic Survey IDB PID#: DK3460 SETTING CLASSIFICATION: Concrete monument OPUS PID: LATITUDE: 35° 12.5' N ( 35.20861) LONGITUDE: 75° 41.9' W ( -75.69917) The bench mark is located 19.1 m (62.5 ft) northwest of NPS monument--p.i. 2877+75--, 17.4 m (57.1 ft) west-southwest of a power pole with transformer and a reference tag, 13.5 m (44.4 ft) south of the centerline of NC 12 11, 5.4 m (17.8 ft) southwest of the base of the westernmost of 3 guy wires, and 0.4 m (1.3 ft) north-northeast of a carsonite witness post.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 6 of 9 Station ID: 8654467 PUBLICATION DATE: 10/07/2020 Name: USCG STATION HATTERAS, PAMLICO SOUND NC NOAA Chart: 11555 Latitude: 35° 12.5' N ( 35.20864) USGS Quad: HATTERAS Longitude: 75° 42.2' W ( -75.70417) T I D A L B E N C H M A R K S BENCH MARK STAMPING: Y 194 1977 DESIGNATION: Y 194 MONUMENTATION: Vertical Control disk VM#: 21472 AGENCY: National Ocean Service (NOS) IDB PID#: EX0261 SETTING CLASSIFICATION: Copper-clad steel rod OPUS PID: LATITUDE: 35° 12.8' N ( 35.21294) LONGITUDE: 75° 41.7' W ( -75.69563) The bench mark is located 35.4 m (116.1 ft) west of the center of the campground driveway, 28.28 m (92.78 ft) north of the northeast corner of a frame house, and 29.26 m (96.00 ft) west of a telephone pedestal (16W), and is .076 m (3 in) below ground level.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 7 of 9 Station ID: 8654467 PUBLICATION DATE: 10/07/2020 Name: USCG STATION HATTERAS, PAMLICO SOUND NC NOAA Chart: 11555 Latitude: 35° 12.5' N ( 35.20864) USGS Quad: HATTERAS Longitude: 75° 42.2' W ( -75.70417) T I D A L B E N C H M A R K S BENCH MARK STAMPING: A 193 1977 DESIGNATION: A 193 MONUMENTATION: Vertical Control disk VM#: 22928 AGENCY: National Ocean Service (NOS) IDB PID#: EX0260 SETTING CLASSIFICATION: Base plate screwed into ground OPUS PID: LATITUDE: 35° 13.0' N ( 35.21664) LONGITUDE: 75° 41.2' W ( -75.68669) The bench mark is a bench mark disk located 30.2 m (99.1 ft) west of the westmost corner of a telephone building, 16.2 m (53.1 ft) NW of the center of a dirt driveway, 13.4 m (44.0 ft) NE of the centerline of NC 12, 6.6 m (21.7 ft) WNW of a fence post with reference tags, and 3.9 m (12.8 ft) north of a power pole with reference tags.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 8 of 9 Station ID: 8654467 PUBLICATION DATE: 10/07/2020 Name: USCG STATION HATTERAS, PAMLICO SOUND NC NOAA Chart: 11555 Latitude: 35° 12.5' N ( 35.20864) USGS Quad: HATTERAS Longitude: 75° 42.2' W ( -75.70417) T I D A L D A T U M S Tidal datums at USCG STATION HATTERAS, PAMLICO SOUND based on: LENGTH OF SERIES: 5 YEARS TIME PERIOD: 05/2010-04/2011, 09/2013-08/2017 TIDAL EPOCH: 1983-2001 CONTROL TIDE STATION: 8652587 OREGON INLET MARINA, PAMLICO SOUND Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS: HIGHEST OBSERVED WATER LEVEL (10/09/2016) = 1.925 MEAN HIGHER HIGH WATER MHHW = 0.198 MEAN HIGH WATER MHW = 0.166 North American Vertical Datum NAVD88 = 0.119 MEAN SEA LEVEL MSL = 0.097 MEAN TIDE LEVEL MTL = 0.095 MEAN LOW WATER MLW = 0.023 MEAN LOWER LOW WATER MLLW = 0.000 LOWEST OBSERVED WATER LEVEL (08/27/2011) = -0.821 North American Vertical Datum (NAVD88) Bench Mark Elevation Information In METERS above: Stamping or Designation MLLW MHW 4467 C 2010 1.627 1.461 CAHA 23 2010 1.152 0.986 4467 B 2010 2.153 1.987 4467 A 2010 2.160 1.994 4467 D 2015 1.901 1.735 NC12 11 2000 3.377 3.211 NC12 12 2000 2.164 1.998 Y 194 1977 0.672 0.506 A 193 1977 0.992 0.825 Foot Notes: Bench mark A 193 1977 is based on one differential leveling connection and do not meet the quality control standards of the NOS. Therefore, caution should be used when deriving elevations for these marks.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 9 of 9 Station ID: 8654467 PUBLICATION DATE: 10/07/2020 Name: USCG STATION HATTERAS, PAMLICO SOUND NC NOAA Chart: 11555 Latitude: 35° 12.5' N ( 35.20864) USGS Quad: HATTERAS Longitude: 75° 42.2' W ( -75.70417) 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.