U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 6 Station ID: 8656612 PUBLICATION DATE: 09/29/2004 Name: CALICO JACKS MARINA NC NOAA Chart: 11545 Latitude: 34° 41.2' N ( 34.68670) USGS Quad: HARKERS ISLAND Longitude: 76° 32.0' W ( -76.53330) To reach the bench marks proceed 2.6 km (1.6 mi) SE along County Road NO. 1335 from Hakers Island, at Shell Island. The bench marks are located near Shell Point at Hakers Island. T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: NO 1 1973 DESIGNATION: 865 6612 TIDAL 1 MONUMENTATION: Tidal Station disk VM#: 14971 AGENCY: National Ocean Survey (NOS) IDB PID#: SETTING CLASSIFICATION: Concrete slab OPUS PID: LATITUDE: 34° 41.2' N ( 34.68670) LONGITUDE: 76° 32.0' W ( -76.53330) The bench mark is a disk set in the SE corner of a concrete slab with a 76 sign, 2.01 km (1.25 mi) SE along County Road 1335 from Harkers Island School, 5.18 m (17.0 ft) west of the NW corner of Calico Jacks Marina Office, 1.83 m (6.0 ft) east of the east wall of a boat ramp, and 0.06 m (0.2 ft) NW of the end of a road at Shell Point. BENCH MARK STAMPING: NO 2 1973 DESIGNATION: 865 6612 TIDAL 2 MONUMENTATION: Tidal Station disk VM#: 14972 AGENCY: National Ocean Survey (NOS) IDB PID#: SETTING CLASSIFICATION: Concrete metal porch OPUS PID#: BBCJ59 LATITUDE: 34° 41.2' N ( 34.68670) LONGITUDE: 76° 32.0' W ( -76.53330) The bench mark is a disk set flush on top of a concrete metal porch, 1.9 km (1.2 mi) SE along County Road 1335 from Harkers Island School, 0.5 km (0.3 mi) NW of the end of the end of a road at Shell Point, 9.88 m (32.4 ft) SW of the centerline of the road, 0.24 m (0.8 ft) west of the north corner of a motel building, and 0.3 m (1 ft) above ground level.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 6 Station ID: 8656612 PUBLICATION DATE: 09/29/2004 Name: CALICO JACKS MARINA NC NOAA Chart: 11545 Latitude: 34° 41.2' N ( 34.68670) USGS Quad: HARKERS ISLAND Longitude: 76° 32.0' W ( -76.53330) T I D A L B E N C H M A R K S BENCH MARK STAMPING: SAM 3 1962 DESIGNATION: SAM 3 MONUMENTATION: Triangulation Station disk VM#: 14974 AGENCY: US Coast and Geodetic Survey (USC&GS) IDB PID#: EA0275 SETTING CLASSIFICATION: Concrete monument OPUS PID: LATITUDE: 34° 41.0' N ( 34.68330) LONGITUDE: 76° 31.6' W ( -76.52670) The bench mark is a disk set in a square concrete monument, 2.5 km (1.6 mi) SE along County Road 1335 from Harkers Island School, 40.39 m (132.5 ft) west of and across the road from the west porch corner of the Shell Point Restaurant, 7.62 m (25.0 ft) SW of the centerline of the road, and 0.46 m (1.5 ft) NE of a wooden witness post.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 6 Station ID: 8656612 PUBLICATION DATE: 09/29/2004 Name: CALICO JACKS MARINA NC NOAA Chart: 11545 Latitude: 34° 41.2' N ( 34.68670) USGS Quad: HARKERS ISLAND Longitude: 76° 32.0' W ( -76.53330) T I D A L B E N C H M A R K S BENCH MARK STAMPING: SAM 3 1962 NO 6 DESIGNATION: SAM 3 RM 6 MONUMENTATION: Reference Mark disk VM#: 14975 AGENCY: US Coast and Geodetic Survey (USC&GS) IDB PID#: EA0274 SETTING CLASSIFICATION: Concrete post OPUS PID: LATITUDE: 34° 41.1' N ( 34.68500) LONGITUDE: 76° 31.6' W ( -76.52670) The bench mark is a disk set in the top of a concrete post, 2.6 km (1.6 mi) SE along County Road 1335 from Harkers Island School, near the end of the road at Shell Point, 54.10 m (177.5 ft) WNW of and across the road from the NW porch corner of the Shell Point Restaurant, 24.02 m (78.8 ft) SW of the west corner of a concrete block building, 6.34 m (20.8 ft) SW of the centerline of the road, and 0.46 m (1.5 ft) SW of the board fence. BENCH MARK STAMPING: SAM 3 1962 NO 7 DESIGNATION: SAM 3 RM 7 MONUMENTATION: Reference Mark disk VM#: 14976 AGENCY: US Coast and Geodetic Survey (USC&GS) IDB PID#: EA0277 SETTING CLASSIFICATION: Concrete post OPUS PID: LATITUDE: 34° 41.1' N ( 34.68500) LONGITUDE: 76° 31.6' W ( -76.52670) The bench mark is a disk set in the top of a concrete post, 28.50 m (93.5 ft) west of and across the road from the west porch corner of the Shell Point Restaurant, 6.40 m (21.0 ft) SW of the centerline of the road, and 0.46 m (1.5 ft) SW of a board fence.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 6 Station ID: 8656612 PUBLICATION DATE: 09/29/2004 Name: CALICO JACKS MARINA NC NOAA Chart: 11545 Latitude: 34° 41.2' N ( 34.68670) USGS Quad: HARKERS ISLAND Longitude: 76° 32.0' W ( -76.53330) T I D A L B E N C H M A R K S BENCH MARK STAMPING: W 163 1963 DESIGNATION: W 163 MONUMENTATION: Bench Mark disk VM#: 14978 AGENCY: US Coast and Geodetic Survey (USC&GS) IDB PID#: EA0276 SETTING CLASSIFICATION: Copper clad steel rod OPUS PID: LATITUDE: 34° 41.1' N ( 34.68500) LONGITUDE: 76° 31.6' W ( -76.52670) The bench mark is a disk, 29.57 m (97.0 ft) NW of the west porch corner of Shell Point Restaurant, near the west corner of the parking lot, 9.30 m (30.5 ft) NE of the centerline of the road, 1.07 m (3.5 ft) SW of power pole No. 289, 0.46 m (1.5 ft) NW of a wooden witness post, and 0.3 m (1 ft) west of the end of a wooden fence. The bench mark is set 6 cm (0.2 ft) above the ground, crimped to a copper-clad steel rod driven 17.1 m (56 ft).
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 6 Station ID: 8656612 PUBLICATION DATE: 09/29/2004 Name: CALICO JACKS MARINA NC NOAA Chart: 11545 Latitude: 34° 41.2' N ( 34.68670) USGS Quad: HARKERS ISLAND Longitude: 76° 32.0' W ( -76.53330) T I D A L D A T U M S Tidal datums at CALICO JACKS MARINA based on: LENGTH OF SERIES: 5 MONTHS TIME PERIOD: June 1977 - October 1977 TIDAL EPOCH: 1983-2001 CONTROL TIDE STATION: 8656483 BEAUFORT, DUKE MARINE LAB Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS: MEAN HIGHER HIGH WATER MHHW = 0.613 MEAN HIGH WATER MHW = 0.552 North American Vertical Datum NAVD88 = 0.388 MEAN SEA LEVEL MSL = 0.295 MEAN TIDE LEVEL MTL = 0.290 MEAN LOW WATER MLW = 0.029 MEAN LOWER LOW WATER MLLW = 0.000 North American Vertical Datum (NAVD88) Bench Mark Elevation Information In METERS above: Stamping or Designation MLLW MHW NO 1 1973 1.975 1.423 NO 2 1973 2.320 1.768 SAM 3 1962 1.079 0.527 SAM 3 1962 NO 6 1.211 0.659 SAM 3 1962 NO 7 0.963 0.411 W 163 1963 1.358 0.806
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 6 of 6 Station ID: 8656612 PUBLICATION DATE: 09/29/2004 Name: CALICO JACKS MARINA NC NOAA Chart: 11545 Latitude: 34° 41.2' N ( 34.68670) USGS Quad: HARKERS ISLAND Longitude: 76° 32.0' W ( -76.53330) 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.