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Details for Benchmark: AE7506

N 35° 48.270 W 078° 37.500 (NAD 83)

Altitude: 242.3

Coordinates may not be exact. Altitude is VERTCON and location is ADJUSTED. (more info)

Location:
In WAKE county, NC View Original Datasheet
Designation:
B 218 RESET 1987
Marker Type:
bench mark disk
Setting:
mat foundation, concrete slab, etc.
Stability:
May hold, but of type commonly subject to surface motion.

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Recovered as described.

[Photos:]
photoDisk

Recovered in good condition - see attached pictures.

[Photos:]
photocloseup of marker
recovered in good condition
photolocation to NW
marker indicated by red box

Documented History (by the NGS)

01/01/1987 by NCGS (MONUMENTED)
03/25/1996 by NCGS (GOOD)
DESCRIBED BY NORTH CAROLINA GEODETIC SURVEY 1996 (JGG) RECOVERED AS DESCRIBED. STATION IS IN NORTHEAST RALEIGH. ALONG WAKE FOREST ROAD FOR 0.25 MI (0.40 KM) SOUTHWEST FROM WHITAKER MILL ROAD, AT THE RAILROAD BRIDGE, AT THE SOUTHEAST CORNER. MARK IS LOCATED 4.6 FT (1.4 M) SOUTH-SOUTHWEST OF THE SOUTH RAIL OF THE TRACK, 9.1 FT (2.8 M) WEST-NORTHWEST OF THE SOUTHEAST END OF THE CONCRETE BRIDGE RAIL, 41.0 FT (12.5 M) WEST-NORTHWEST OF A SIGNAL LIGHT POLE, AND 2.5 FT (0.8 M) NORTH OF THE BRIDGE RAIL.

Control Text

  • The North Carolina/South Carolina HARNS have been completed but, due to contractual restrictions, coordinates for these stations will NOT be published in the near future. In the interim, the published coordinates in North and South Carolina will not be consistent with the Continuously Operating Reference Stations (CORS). The HARN coordinates for these stations are available upon request. Contact Gary Thompson(919-733-3836), or Lewis Lapine(803-896-7700). In addition, the published North and South Carolina positions (NAD 83 (1986)) are NOT consistent with those determined in adjacent state readjustments. The discontinuity between stations located in North or South Carolina and those in adjacent states which have been adjusted to the HARN may be as much as 5 decimeters. This will result in a significant loss of accuracy over lines crossing such state borders.
  • The horizontal coordinates were established by classical geodetic methods and adjusted by the National Geodetic Survey in February 1998.
  • The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) The vertical order pertains to the superseded datum.
  • The Laplace correction was computed from DEFLEC99 derived deflections.
  • The geoid height was determined by GEOID99.

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