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Details for Benchmark: KV0812

N 40° 11.167 W 074° 01.500 (NAD 83)

Altitude: 18.75

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

Location:
In MONMOUTH county, NJ View Original Datasheet
Designation:
IN RM 2
Marker Type:
reference mark disk
Setting:
pavements (street, sidewalk, curb, apron, etc.)
Stability:
Mark of questionable or unknown stability.

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Documented History (by the NGS)

01/01/1933 by CGS (MONUMENTED)
01/01/1961 by CGS (GOOD)
DESCRIBED BY COAST AND GEODETIC SURVEY 1961 AT AVON. 0.4 MILE SOUTH ALONG NEW YORK AND LONG BRANCH RAILROAD FROM THE STATION AT AVON, WEST OF THE TRACKS IN THE SIDEWALK AT THE SOUTH END OF THE WEST SIDE OF STATE HIGHWAY 35 BRIDGE OVER THE NORTH ARM OF SHARK RIVER, 86 FEET NORTHWEST OF BENCH MARK 2 (STATION INN 1933), 33 FEET NORTH OF THE SOUTH END OF THE BRIDGE AND 0.5 FOOT EAST OF THE GUARD RAIL. SET IN A DRILL HOLE.
01/01/1964 by CGS (MARK NOT FOUND)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1964 MARK NOT FOUND.
01/01/1984 by USPSQD (MARK NOT FOUND)
RECOVERY NOTE BY US POWER SQUADRON 1984 MARK NOT FOUND.
05/09/1989 by NJGS (GOOD)
RECOVERY NOTE BY NEW JERSEY GEODETIC SURVEY 1989 THE STATION IS IN THE CITY OF NEPTUNE, LOCATED IN THE SIDEWALK AT THE SOUTH END OF THE WEST SIDE OF STATE ROUTE 35 BRIDGE OVER THE NORTH ARM OF SHARK RIVER. THE STATION IS 10.06 M (33.01 FT) NORTH OF THE SOUTH END OF THE BRIDGE AND 0.17 M (0.56 FT) EAST OF THE CONCRETE BRIDGE RAILING.

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. WARNING-Repeat measurements at this control monument indicate possible vertical movement.
  • 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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