Details for Benchmark: EA2722
N 34° 03.341 W 077° 53.985 (NAD 83)
Coordinates may not be exact. Altitude is VERTCON and location is ADJUSTED. (more info)
- In NEW HANOVER county, NC View Original Datasheet
- HI BRIDGE NCGS 1975
- Marker Type:
- traverse station disk
- setting not listed - see description
- Mark of questionable or unknown stability.
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Documented History (by the NGS)
|01/01/1975 by NCGS (MONUMENTED)
|DESCRIBED BY NORTH CAROLINA GEODETIC SURVEY 1975 (LA)
HI BRIDGE IS A N. C. GEODETIC SURVEY TRAVERSE STATION ESTABLISHED IN THE VICINITY OF CAROLINA BEACH, NORTH CAROLINA.
HI BRIDGE IS LOCATED APPROXIMATELY 1.5 MILES NORTH OF CAROLINA BEACH, AND 12.6 MILES SOUTH OF WILMINGTON. STATION IS NEAR THE CENTER OF THE U.S. 421 BRIDGE OVER THE INTRACOASTAL WATERWAY (SNOWS CUT), IN THE MIDDLE OF THE WEST WALKWAY.
STATION MARK IS A STANDARD N. C. BRASS TRAVERSE DISK, STAMPED HI BRIDGE 1975, SET FLUSH IN A CONCRETE WALKWAY.
MARK IS 1.5 FT W OF WEST HIGHWAY CLUB
1.5 FT E OF WEST BRIDGE RAIL
22.0 FT S OF A PIPE SUPPORTING A LIGHT UNDER BRIDGE.
|07/28/1995 by USPSQD (GOOD)
|RECOVERY NOTE BY US POWER SQUADRON 1995
RECOVERED IN GOOD CONDITION.
- 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Carolina HARNS have been completed but, due to contractual restrictions, coordinates for these stations will NOT be published in the near future.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 July 1986.
- The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.)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.