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Details for Benchmark: FA4990

N 35° 17.530 W 081° 32.621 (NAD 83)

Altitude: 887

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

Location:
In CLEVELAND county, NC View Original Datasheet
Designation:
JUNIOR
Marker Type:
horizontal control disk
Setting:
set into the top of a round concrete monument
Stability:
May hold, but of type commonly subject to surface motion.

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Documented History (by the NGS)

01/01/1984 by NCGS (MONUMENTED)
DESCRIBED BY NORTH CAROLINA GEODETIC SURVEY 1984 THE STATION IS LOCATED IN SHELBY. ALONG MARION STREET (US 74 BUSINESS) FOR 0.32 KM (0.20 MI) WEST FROM THE INTERSECTION WITH NC 18 (LAFAYETTE STREET), AT THE SHELBY JUNIOR HIGH SCHOOL. STATION IS LOCATED 8.38 M (27.49 FT) NORTH OF THE CENTERLINE OF MARION STREET, 9.51 M (31.20 FT) WEST OF THE CENTERLINE OF CLYDE STREET, 2.74 M (8.99 FT) SOUTH OF THE SOUTH EDGE OF THE SIDEWALK, 1.22 M (4.00 FT) SOUTHWEST OF A FIRE HYDRANT, 2.68 M (8.79 FT) WEST-NORTHWEST OF THE CENTER OF A STORM DRAIN--AND 21.98 M (72.11 FT) EAST OF A POWER POLE, 12.62 M (41.40 FT) WEST OF A POWER POLE--BOTH WITH REFERENCE TAGS. MARK IS RECESSED 3 INCHES BELOW GROUND AND IS LEVEL WITH HIGHWAY.
03/15/1995 by USPSQD (MARK NOT FOUND)
RECOVERY NOTE BY US POWER SQUADRON 1995 MARK NOT FOUND.
08/03/1998 by NCGS (SEE DESCRIPTION)
RECOVERY NOTE BY NORTH CAROLINA GEODETIC SURVEY 1998 (MDB) THE STATION WAS NOT FOUND. SEVERAL REFERENCES REMAIN. AREA WAS THOROUGHLY PROBED. A HOLE WAS FOUND IN THE AREA. STATION IS PROBABLY DESTROYED.

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Carolina HARNS have been completed but, due to contractual restrictions, coordinates for these stations will NOT be published in the near future.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 September 1992.
  • The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.)
  • The Laplace correction was computed from DEFLEC99 derived deflections.
  • The geoid height was determined by GEOID99.

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