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Details for Benchmark: KV0803

N 40° 11.383 W 074° 01.433 (NAD 83)

Altitude: 12.81

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

Location:
In MONMOUTH county, NJ View Original Datasheet
Designation:
L 54
Marker Type:
bench mark 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)

01/01/1961 by CGS (MONUMENTED)
01/01/1964 by CGS (GOOD)
DESCRIBED BY COAST AND GEODETIC SURVEY 1964 AT AVON. AT AVON, ABOUT 100 YARDS SOUTH OF THE RAILROAD STATION, 77.0 FEET WEST OF THE CENTER LINE OF A BLACK TOP STREET, 67.0 FEET SOUTHEAST OF MILEPOST 30, 38.5 FEET SOUTHWEST OF A BRACE POLE NUMBER JC 75 AV, 28.0 FEET EAST OF THE EAST RAIL OF THE NORTH BOUND TRACK, 1.8 FEET SOUTHEAST OF A METAL WITNESS POST, ABOUT LEVEL WITH THE STREET AND SET IN TOP OF A CONCRETE POST WHICH PROJECTS ABOUT 2 INCHES ABOVE THE GROUND.
01/01/1973 by NJGS (GOOD)
RECOVERY NOTE BY NEW JERSEY GEODETIC SURVEY 1973 RECOVERED IN GOOD CONDITION.
01/01/1984 by USPSQD (MARK NOT FOUND)
RECOVERY NOTE BY US POWER SQUADRON 1984 MARK NOT FOUND.
01/01/1987 by USPSQD (MARK NOT FOUND)
RECOVERY NOTE BY US POWER SQUADRON 1987 (JHF) MARK NOT FOUND.
08/22/1992 by USPSQD (MARK NOT FOUND)
RECOVERY NOTE BY US POWER SQUADRON 1992 (JK) MARK NOT FOUND.

Control Text

  • The horizontal coordinates were scaled from a topographic map and have an estimated accuracy of +/- 6 seconds.
  • The orthometric height was determined by differential leveling and adjusted by the National Geodetic Survey in June 1991.
  • The geoid height was determined by GEOID99.
  • The dynamic height is computed by dividing the NAVD 88 geopotential number by the normal gravity value computed on the Geodetic Reference System of 1980 (GRS 80) ellipsoid at 45 degrees latitude (g = 980.6199 gals.).
  • The modeled gravity was interpolated from observed gravity values.

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